CN104078194B - Magnetic devices and its assemble method with integrated current sensing element - Google Patents
Magnetic devices and its assemble method with integrated current sensing element Download PDFInfo
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- CN104078194B CN104078194B CN201410118363.5A CN201410118363A CN104078194B CN 104078194 B CN104078194 B CN 104078194B CN 201410118363 A CN201410118363 A CN 201410118363A CN 104078194 B CN104078194 B CN 104078194B
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Abstract
The invention provides the magnetic devices with integrated current sensing element and its assemble method.Specifically, the invention provides a kind of magnetic devices (102).The magnetic devices (102) include magnetic core (116) and are inductively connected to the conductive winding (118) of magnetic core.Conductive winding includes the first terminal section (140), Second terminal section (142) and the serially linked sensing section (144) between the first terminal section (140) and Second terminal section (142).The first terminal section includes current sensing element (112;500).
Description
The cross reference of related application
The U.S. Provisional Patent Application No.'s 61/805,755 that patent application claims are submitted on March 27th, 2013 is preferential
Power, the full text of this application is incorporated herein by reference.
Technical field
The field of the disclosure relates generally to power electronic device, and more particularly, to the electric current with integration
The magnetic devices of sensing element.
Background technology
Power electronic system generally includes printed circuit board (PCB) and multiple electric components, and the multiple electric component is installed to
Printed circuit board (PCB) is electrically connected with being set up between electric component.The electric component in power electronic system is flowed through in measurement and monitoring
Electric current is important for preventing overload and may damage electric component.In addition, with the electronic system to more power density
Demand increase, efficiently become more and more important using plate space.
For measure at least some known devices of the electric current in power electronic system need relatively great amount of plate space and/
Or need it is complicated, often expensive circuit obtain accurate current measurement.For example, some known current sensing device bags
Include discrete current-sense resistor being separated with other electric components, being installed to printed circuit board (PCB).
Other known current sensing device is flowed through using 4 terminal measurements on the winding of electric component to measure
The electric current of the electric component.However, such current sensing device is usually required with low resistance temperature coefficient (thermal
Coefficient of resisivity) and therefore with respect to the winding of high resistivity.The winding of such electric component has phase
To big cross-sectional area with increased resistance in compensative winding, and therefore, such electric component is typically larger than conventional electricity
Gas part.
Other other known current sensing devices flow through one using discrete or special current sensing circuit to measure
The electric current of individual or multiple electric components.Such current sensing circuit usually requires extra plate space and/or needed extra
Cost is to be implemented into electronic system.In addition, the degree of accuracy of such current sensing circuit is easily by temperature change in electric component
Influence.
The content of the invention
On the one hand there is provided a kind of magnetic devices, the magnetic devices include magnetic core and inductively couple (couple, also
Claim " coupling ") to magnetic core conductive winding.Conductive winding includes the first terminal section, Second terminal section and electric in series
It is connected in the sensing section between the first and second terminal sections.The first terminal section includes current sensing element.
On the other hand there is provided a kind of printed circuit-board assembly, the printed circuit-board assembly include printed circuit board (PCB) and
It is connected to the magnetic devices of the printed circuit board (PCB).Magnetic devices include magnetic core and are inductively connected to the conductive winding of magnetic core.Lead
Electric winding includes the first terminal section, Second terminal section, electrically connects sense between the first and second terminal sections in series
Answer section and current sensing element.First and second terminal sections be configured to by magnetic core be spaced apart with printed circuit board (PCB) away from
From.
It yet still another aspect, there is provided a kind of method for assembling magnetic devices.This method includes：Magnetic core is provided；There is provided conductive
Winding, the conductive winding includes the first terminal section, Second terminal section and electrically connected in series in the first and second terminals
Sensing section between section；Current sensing element is provided in the first terminal section；And inductively couple conductive winding
To magnetic core.
The present invention provides a kind of magnetic devices, and it includes：Magnetic core；And conductive winding, it is inductively connected to magnetic core, leads
Electric winding includes the first terminal section, Second terminal section and electrically connected in series in the first terminal section and Second terminal
Sensing section between section, wherein the first terminal section include current sensing element.
Preferably, the first terminal section also includes the first sensing terminals and the second sensing terminals, current sensing element connection
Between the first and second sensing terminals, and the electric current in response to flowing through conductive winding is configured so that, in first and
Voltage difference and current in proportion between two sensing terminals.
Preferably, the first sensing terminals are spaced apart with the second sensing terminals, and conductive winding also includes recess, and recess is defined
In conductive winding and it is arranged between the first and second sensing terminals.
Preferably, the first terminal section is divided into Part I and Part II, the first sensing terminals by current sensing element
Part I is connected to, and the second sensing terminals are connected to Part II.
Preferably, the first terminal section also includes input/output terminal, and input/output terminal has than first and second
The bigger cross-sectional area of the cross-sectional area of each in sensing terminals.
Preferably, input/output terminal is spaced apart with least one in the first and second sensing terminals, and conductive winding is also
Including recess, recess be limited in conductive winding and be arranged on input/output terminal and the first and second sensing terminals in
Between at least one.
Preferably, magnetic core, which has, is limited to opening therein, and senses section and be arranged in opening.
Preferably, current sensing element is arranged on the outside of opening.
Preferably, current sensing element has the resistivity bigger than the resistivity of conductive winding.
The present invention also provides a kind of printed circuit-board assembly, and it includes：Printed circuit board (PCB)；And magnetic devices, it couples
To printed circuit board (PCB).The magnetic devices include：Magnetic core；And conductive winding, it is inductively connected to magnetic core, and conductive winding includes
The first terminal section, Second terminal section, serially linked sensing section, Yi Ji electricity between the first and second terminal sections
Flow sensing element, wherein the first and second terminal sections be configured to magnetic core is spaced apart with printed circuit board (PCB).
Preferably, distance is more than the thickness of conductive winding.
Preferably, the first terminal section includes current sensing element.
Preferably, the first terminal section includes the first sensing terminals and the second sensing terminals, and current sensing element is connected in
Between first and second sensing terminals, and the electric current in response to flowing through conductive winding is configured so that, first and second
Voltage difference and current in proportion between sensing terminals.
Preferably, the first terminal section is divided into Part I and Part II, the first sensing terminals by current sensing element
Part I is connected to, and the second sensing terminals are connected to Part II.
Preferably, the first terminal section also includes input/output terminal, and input/output terminal has than first and second
The bigger cross-sectional area of the cross-sectional area of each in sensing terminals.
Preferably, current sensing element has the resistivity bigger than the resistivity of conductive winding.
The present invention also provides a kind of method for assembling magnetic devices, and this method includes：Magnetic core is provided；Conductive winding is provided,
Conductive winding include the first terminal section, Second terminal section and electrically connect in series the first and second terminal sections it
Between sensing section；Current sensing element is provided in the first terminal section；And conductive winding is inductively connected to magnetic core.
Preferably, magnetic core, which has, is limited to opening therein, wherein inductively connection conductive winding includes that section will be sensed
It is positioned in opening.
Preferably, this method also includes the outside that current sensing element is positioned to opening.
Preferably, this method also includes：Printed circuit board (PCB) is provided；And join the first terminal section and Second terminal section
It is connected to printed circuit board (PCB) so that magnetic core is spaced apart with printed circuit board (PCB), the distance is more than the thickness of conductive winding.
Brief description of the drawings
Fig. 1 is the schematic diagram for the example electronic system for including magnetic devices.
Fig. 2 is the perspective view of magnetic devices shown in Fig. 1, and it includes the current sense member being integrally formed with conductive winding
Part.
Fig. 3 is the exploded view of magnetic devices shown in Fig. 2.
Fig. 4 is the perspective view of conductive winding shown in Fig. 2 and Fig. 3 and current sensing element.
Fig. 5 is the perspective view for the alternative current sensing element being integrally formed with Fig. 4 conductive winding.
Fig. 6 is the partial side view of printed circuit board (PCB) (PCB) component shown in Fig. 2 and Fig. 3 and magnetic devices.
Fig. 7 is the perspective view of alternative magnetic devices.
Fig. 8 is the flow chart for the illustrative methods for assembling magnetic devices.
Fig. 9 is the flow chart of the illustrative methods for assembled printed circuit boards component.
Although the specific features of various embodiments may show in some accompanying drawings and not shown in other accompanying drawings, this
For the sake of convenience.Any feature of any accompanying drawing can combine any other accompanying drawing any feature be cited and/
Or it is claimed.
Reference
100 electronic circuits
102 integrated magnetic devices
104 first switching devices
106 second switching devices
108 inductors
The D.C. resistance of 110 inductors
112 current sensing elements
114 processing units
116 magnetic cores
118 conductive windings
120 first sides
122 second sides
124 first ends
126 the second ends
128 tops
130 bottoms
First of 132 magnetic cores
Second of 134 magnetic cores
136 openings
138 passages
140 the first terminal sections
142 Second terminal sections
144 sensing sections
146 first sensing terminals
148 second sensing terminals
150 the oneth I/O terminals
152 the 2nd I/O terminals
154 first recesses
156 second recesses
158 Part I
160 Part II
500 alternative current sensing elements
600 printed circuit-board assemblies
602 printed circuit board (PCB)s
The distance between 604 magnetic cores and printed circuit board (PCB)
700 alternative integrated magnetic devices
702 magnetic cores
704 conductive windings
706 current sensing elements.
Embodiment
This document describes the exemplary embodiment of magnetic devices.Magnetic devices include magnetic core and are inductively connected to magnetic core
Conductive winding.Conductive winding includes the first terminal section, Second terminal section and electrically connected in series at the first and second ends
Sensing section between sub-segments.The first terminal section includes current sensing element.
Embodiment described herein provides the magnetic devices with the current sensing element being integrated into conductive winding.Phase
Than some known current measuring devices, magnetic devices described herein advantageously reduce power of the assembling with current measuring device
The number of discrete electrical components needed for electronic system.In addition, compared to some known current measuring devices, magnetic described herein
Device is conducive to effective use circuit board space, while also providing heat-staple, accurate current measurement.
Fig. 1 is the schematic diagram of exemplary electronic circuit 100, and the electronic circuit includes the exemplary magnetic device of the disclosure
102.In the exemplary embodiment, electronic circuit 100 is Buck switched-mode (buck switch-mode) power inverter, its
It is configured to input voltage VinIt is transformed to output voltage Vout.Electronic circuit 100 switches including the first switching device 104, second
Device 106 and magnetic devices 102.In the exemplary embodiment, magnetic devices 102 are inductor assemblies, and it is included with direct current
The inductor 108 of resistance 110 and the current sensing element 112 being integrated into magnetic devices 102.First switching device 104
And second switching device 106 switch to produce output voltage V between the open position of opposite phase and closing positionout.Showing
In example property embodiment, the first switching device 104 and the second switching device 106 are transistor switch (specifically, MOSFET), and
And one or more controller (not shown) are connected to, the controller is configured to the grid to each switching device 104 and 106
The control signal of pole side output pulse width modulation.
Although magnetic devices 102 are described with reference to Buck switched-mode power inverter, the magnetic devices of the disclosure
It can be realized in the magnetic devices any suitable electrical architecture as described herein worked is enable.In addition, although magnetic
Property device 102 is described as inductor assembly, but the magnetic devices and its specific features of the disclosure can be embodied in and make the magnetic
Property any electric component that as described herein can work of device in, including for example integrated magnetic transformer component and many
Individual inductor assembly.
With the configuration of four terminals sensing, (connection of also referred to as four terminal Kelvin types, four lines sensing are connected current sensing element 112
With four-point probe connection) it is connected to electronic circuit 100 so that flow through the electric current I of inductor 108LCan be by measuring across electric current sense
The voltage difference of element 112 is surveyed to determine.More specifically, current sensing element 112 and inductor 108 electrically connect in series and
Electrically connected in parallel with processing unit 114, processing unit 114 is configured to using the MS between electric current, resistance and voltage
System is calculated and/or monitored the electric current I for flowing through inductor 108 based on the voltage difference across current sensing element 112L.Processing unit
114 may be additionally configured in the electric current I detectedLTerminated when meeting some conditions (for example, beyond threshold current) supplied to electricity
The power of sub-circuit 100.
Fig. 2 is the perspective view of magnetic devices 102, and Fig. 3 is the exploded view of magnetic devices 102.In exemplary embodiment
In, magnetic devices 102 include magnetic core 116, are inductively connected to magnetic core 116 to form the (figure of conductive winding 118 of inductor 108
1) current sensing element 112 and with conductive winding 118 being integrally formed.
In the exemplary embodiment, magnetic core 116 has the shape for the general rectangular for including six sides.Magnetic core 116
Six sides include：First side 120；Relative second side 122；Relative first end 124 and the second end 126, its
Extend between first side 120 and second side 122；And top 128 and relative bottom 130, it is in first side 120
Extend between second side 122 and between first end 124 and the second end 126.Term " top " and " bottom " are at this
In text combine be installed to such as printed circuit board (PCB) installation surface when magnetic core 116 orientation and use.Therefore, magnetic devices are worked as
102 when being installed to installation surface, and bottom 130 faces installation surface, and top 128 is back to installation surface.In alternative
In, magnetic core 116, which can have, enables any suitable shape as described herein worked of magnetic devices 102 and any suitable number
Purpose side.
In the exemplary embodiment, magnetic core 116 includes first 132, second 134 and is limited in magnetic core 116
Opening 136.In the exemplary embodiment, first 132 and second 134 manufactures the magnetic block being integrated.First 132 He
Second 134 by being made including for example ferritic any suitable magnetic material 102, the material enables magnetic devices 102
It is enough as described herein to work.In the exemplary embodiment, the bottom 130 of first 132 restriction magnetic core 116, and second
134 limit the top 128 of magnetic core 116.In addition, first 132 and second 134 jointly limits first side 120, the second side
Face 122, first end 124 and the second end 126.
In the exemplary embodiment, opening 136 extends through magnetic core 116 from first side 120 to second side 122.Open
Mouth 136 is configured to receive a part for conductive winding 118, as described in more detail herein.In addition, in the exemplary embodiment,
The respective channel 138 that opening 136 is formed from first 132 and second 134 of magnetic core 116 is limited.In alternative
In, the single passage in the only one that opening 136 can be formed from first 132 and second 134 is formed.Other
In alternative, opening 136 can extend sideways through magnetic core 116 to any side from any, including identical is sideways.
Conductive winding 118 is inductively connected to magnetic core 116.In the exemplary embodiment, conductive winding 118 inductively couples
To magnetic core 116 to form inductor 108 as described above.Conductive winding 118 is formed by suitably conductive material, including for example
Copper, aluminium, silver, gold, phosphor bronze and combinations thereof.In the exemplary embodiment, conductive winding 118 has than current sense
The smaller resistivity of the resistivity of element 112.More specifically, the resistivity of conductive winding 118 is in about 10 microhms-centimetre (μ
Ω-cm) and about 0.1 μ Ω-cm in the range of, more suitably in the range of about 5 μ Ω-cm and about 0.5 μ Ω-cm and even
More suitably in the range of about 3 μ Ω-cm and about 1 μ Ω-cm.Conductive winding 118 can be for example by from copper stamped from sheetstock institute
Need shape and configure and formed needed for conductive winding 118 is bent to.
Fig. 4 is the perspective view of conductive winding 118 and current sensing element 112.In the exemplary embodiment, conductive winding
118 include the first terminal section 140, Second terminal section 142 and electrically connect sensing section between them in series
144.In addition, in the exemplary embodiment, current sensing element 112 is integrally formed with conductive winding 118 and is arranged on first
In terminal section 140.Therefore, in the illustrated embodiment, the first terminal section 140 includes current sensing element 112.In addition,
Illustrate in embodiment, current sensing element 140 is arranged on outside the opening 136 in magnetic core 116.
Sensing section 144 is configured to induce magnetic field in magnetic core 116.In the exemplary embodiment, section 144 is sensed
It is arranged in the opening 136 of magnetic core 116.The first terminal section 140 and Second terminal section 142 are configured to be electrically coupled to magnetic
Electrical connector outside device 102.In the exemplary embodiment, the first terminal section 140 and Second terminal section 142 are configured
Into the conductive lead wire that printed circuit board (PCB) is for example electrically coupled to by solder.In addition, in the exemplary embodiment, first end sub-district
Section 140 and Second terminal section 142 are oriented substantially parallel to each other, and substantially perpendicular to sensing section 144.This
Outside, when magnetic devices 102 are assembled, the first terminal section 140 and Second terminal section 142 are protruding from magnetic core 116, and
And extend beyond the bottom 130 of magnetic core 116.
In addition, in the exemplary embodiment, the first terminal section 140 includes the first sensing terminals 146, the second sensing terminals
148 and first input/output (I/O) terminal 150.Second terminal section 142 includes the 2nd I/O terminals 152.Such as herein
In it is described in more detail, the first sensing terminals 146 and the second sensing terminals 148 are configured to measure across current sensing element 112
Voltage difference, the voltage difference and the electric current I for flowing through conductive winding 118LProportional (Fig. 1).First I/O terminals 150 and the 2nd I/O ends
Son 152 be configured to receive input signal from the electric component for being connected to magnetic devices 102, and/or by signal output extremely
It is connected to the electric component of magnetic devices 102.In addition, in the exemplary embodiment, the first I/O terminals 150 and the 2nd I/O terminals
152 cross-sectional area is more than the cross-sectional area of both the first sensing terminals 146 and the second sensing terminals 148, to be led to flow through
The electric current of electric winding 118 is provided compared with low resistance path.
In the exemplary embodiment, the first sensing terminals 146 are spaced apart with the second sensing terminals 148, and conductive winding
118 include the first recess 154, and first recess 154 is limited in conductive winding 118 and is arranged on the first sensing terminals 146
And second between sensing terminals 148.In addition, between the first I/O terminals 150 and the first sensing terminals 146 and the second sensing terminals 148
Separate, and conductive winding 118 includes the second recess 156, and second recess 156 is limited in conductive winding 118 and set
Between the first I/O terminals 150 and the first sensing terminals 146.
Current sensing element 112 is connected between the first sensing terminals 146 and the second sensing terminals 148, and is configured
Into the electric current I caused in response to flowing through conductive winding 118L, between the first sensing terminals 146 and the second sensing terminals 148
Voltage difference and the voltage drop across current sensing element 112 and flow through the electric current I of conductive winding 118LIt is proportional.In addition, electric current sense
Surveying element 112 has the resistivity bigger than the resistivity of conductive winding 118 and the resistance temperature system than conductive winding 118
The smaller temperature-coefficient of electrical resistance of number.Therefore, current sensing element 112 has compared to of a relatively high thermally-stabilised of conductive winding 118
Resistance, and therefore be conducive to using four terminals sense e measurement technology accurate current measurement.
Current sensing element 112, which can have, enables any suitable electricity as described herein worked of magnetic devices 102
Resistance rate, such as resistivity of at least about an order of magnitude bigger than the resistivity of conductive winding 118.In a suitable embodiment
In, for example, the resistivity of current sensing element 112 is in the range of about 10 μ Ω-cm and about 200 μ Ω-cm, more suitably about
In the range of 20 μ Ω-cm and about 100 μ Ω-cm and even more suitably in about 30 μ Ω-cm and about 60 μ Ω-cm scope
It is interior.In addition, in another suitable embodiment, the temperature-coefficient of electrical resistance of current sensing element 112 is less than about every degree Celsius million
/ (ppm) 500 (ppm/ DEG C), more suitably less than about 300ppm/ DEG C and even more suitably less than about 100ppm/ DEG C.
May be utilized in fabricating the suitable material of current sensing element 112 includes such as copper-manganese-nickel alloy, nichrome, manganin, siderochrome
Aluminium alloy, corronil and combinations thereof.
The first terminal section 140 is divided into Part I 158 and Part II 160 by current sensing element 112.When electric current stream
When crossing conductive winding 118, across current sensing element 112 voltage drop the first terminal section 140 Part I 158 and first
Voltage difference is formed between the Part II 160 of terminal section 140.How to be attached to according to magnetic devices 102 in electronic circuit, the
A part 158 can have the voltage higher than Part II 160, or Part I 158 can have it is lower than Part II 160
Voltage.First sensing terminals 146 are connected to the Part I 158 of the first terminal section 140, and the second sensing terminals 148
The Part II 160 of the first terminal section 140 is connected to, to detect the voltage drop across current sensing element 112.First sensing
The sensing terminals 148 of terminal 146 and second can be electrically coupled to processing unit 114 (Fig. 1), so as to based on across current sensing element
The electric current I of conductive winding 118 is flowed through in 112 detection voltage drop to calculate and/or monitorL。
In one suitable embodiment, by will be welded for the resistive material sheet material for forming current sensing element 112
It is connected to two sheet of conductor material so that the resistive material sheet material is arranged between the two sheet of conductor material and mutual with it
Even, so that current sensing element 112 be integrally formed with conductive winding 118.The material sheet of welding is then stamped with shape
Into conductive winding 118, the conductive winding 118 has the current sensing element 112 being formed integrally therein.Punching press it is conductive around
Group is then curved to obtain the required orientation of winding.In the illustrated embodiment, current sensing element 112 and conductive winding 118
It is integrally formed so that current sensing element 112 is only extended across the first I/O terminals 150 and the first sensing terminals 146.
Fig. 5 is the perspective view of alternative current sensing element 500 and conductive winding 118.In the embodiment shown in fig. 5,
Current sensing element 500 is integrally formed with conductive winding 118 so that current sensing element 500 is extended across the first I/O terminals
150th, the first sensing terminals 146 and the second sensing terminals 148.
Fig. 6 is the partial side of printed circuit board (PCB) (PCB) component 600 for including printed circuit board (PCB) 602 and magnetic devices 102
Figure.PCB components 600 may include other electric component (not shown), and the electric component is mutual via the conduction on printed circuit board (PCB) 602
Even part is connected to printed circuit board (PCB) 602 and magnetic devices 102.
Magnetic devices 102 are installed to printed circuit board (PCB) 602 via conductive winding 118.In the exemplary embodiment, the first sense
Terminal 146, the second sensing terminals 148, the first I/O terminals 150 and the 2nd I/O terminals is surveyed to be connected on printed circuit board (PCB) 602
Electrical lead or contact (not shown), so as between magnetic devices 102 and the other electric components for being connected to printed circuit board (PCB) 602
Set up electrical connection.First sensing terminals 146, the second sensing terminals 148, the first I/O terminals 150 and the Electricity Federation of the 2nd I/O terminals 152
It is connected to printed circuit board (PCB) 602 so that can be measured to determine to flow through conductive winding 118 across the voltage difference of current sensing element 112
Electric current.
As shown in fig. 6, the first terminal section 140 and Second terminal section 142 of conductive winding 118 are configured to work as magnetic
By magnetic core 116 and printed circuit board (PCB) 602 spaced apart 604 when device 102 is connected to printed circuit board (PCB) 602.In exemplary reality
Apply in example, the first terminal section 140 and Second terminal section 142 extend beyond the enough distance in bottom 130 of magnetic core 116, with
Just the spacing needed for being provided when magnetic devices 102 are connected to printed circuit board (PCB) 602.In addition, in the exemplary embodiment, in magnetic
The distance between core 116 and printed circuit board (PCB) 602 604 is enough so that other electric components can be in magnetic core 116 and printing electricity
Printed circuit board (PCB) 602 is installed between road plate 602.Thus the configuration of magnetic devices 102 is conducive to the higher of printed circuit board (PCB) 602
Effect is used.
Fig. 7 is the perspective view of alternative magnetic devices 700.As described above, the magnetic devices and its specific features of the disclosure
Can be embodied in enables in the magnetic devices any suitable electric component as described herein worked.Magnetic devices 700 are
Dual inductor component, it includes magnetic core 702, is inductively connected to two conductive windings 704 and two electric currents of magnetic core 702
Sensing element 706, each current sensing element 706 is formed in conductive winding 704 in corresponding one.Conductive winding
704 is substantially the same with herein by reference to the conductive winding 118 described in Fig. 2-4, and current sensing element 706 with herein by reference to figure
Current sensing element 112 described in 2-4 is substantially the same.
Fig. 8 is the stream for the illustrative methods 800 for assembling magnetic devices (all magnetic devices 102 as shown in Figures 2 and 3)
Cheng Tu.802 magnetic cores, such as magnetic core 116 are provided.804 conductive windings, such as conductive winding 118 are provided.Conductive winding includes：The
One end sub-segments, such as the first terminal section 140；Second terminal section, such as Second terminal section 142；And sensing section,
For example sense section 144, it is electrically connected between the first terminal section and Second terminal section in series.In the first terminal section
806 current sensing elements of interior offer, such as current sensing element 112.Conductive winding inductively couples 808 and arrives magnetic core.
Fig. 9 is the flow of the illustrative methods 900 of assembled printed circuit boards component (all PCB components 600 as shown in Figure 6)
Figure.902 printed circuit board (PCB)s, such as printed circuit board (PCB) 602 are provided.Integrated current sense member is had according to the assembling of method 800 904
The magnetic devices of part.By magnetic devices connection 906 to printed circuit board (PCB) (for example, by by the first and second ends of conductive winding
Sub-segments are connected to printed circuit board (PCB)) so that magnetic core is spaced apart the distance of the thickness more than conductive winding with printed circuit board (PCB).
This document describes the exemplary embodiment of magnetic devices.Magnetic devices include magnetic core and are inductively connected to magnetic core
Conductive winding.Conductive winding includes the first terminal section, Second terminal section and electrically connects sense between them in series
Answer section.The first terminal section includes current sensing element.
Compared to some known current measuring devices, magnetic devices described herein, which advantageously reduce assembling, has current measurement
The number of discrete electrical components needed for the power electronic circuit of device.In addition, some known current measuring devices are compared, this
The text magnetic devices are conducive to effective use circuit board space, while also providing heat-staple, accurate current measurement.
The execution of operation in embodiments of the invention shown and described herein or implementation order are not most important
, except as otherwise noted.That is, except as otherwise noted, operation, and the implementation of the present invention can be performed in any order
Example may include other operation or the operation less than those operations disclosed herein.For example, it is envisioned that, in another operation
Prior to, concurrently with, or after perform or carry out specific operation all in the range of each aspect of the present invention.
Although the specific features of various embodiments of the present invention may be shown in some accompanying drawings and not in other accompanying drawings
Show, but this is used for the purpose of for the sake of convenience.According to the principle of the present invention, any feature of accompanying drawing can combine any other attached
Any feature of figure is cited and/or is claimed.
The written description uses examples to disclose the present invention including optimal mode, and also enables those skilled in the art
It is enough to implement the present invention, including manufacture and use any device or system and perform any method being included.The present invention's
Patentable scope is defined by the claims, and may include the other examples that those skilled in the art expect.If this other
Example has the indistinguishable structural detail of literal language with claim, or if they include the word with claim
Equivalent structural elements of the face language without essential difference, then this other examples be intended within the scope of the claims.
Claims (16)
1. a kind of magnetic devices, including：
Magnetic core；And
Conductive winding, it is inductively connected to the magnetic core, and the conductive winding includes the first terminal section, Second terminal area
Section and sensing section between the first terminal section and the Second terminal section is electrically connected in series, wherein institute
Stating the first terminal section includes sensing terminals and the input/output terminal being spaced apart with the sensing terminals by recess, described recessed
Mouthful limited by conductive winding, and current sensing element, the current sensing element be extended across the input/output terminal and
The sensing terminals, and with the resistivity bigger than the resistivity of the conductive winding, wherein recess extension at least portion
Divide and enter the current sensing element.
2. magnetic devices according to claim 1, it is characterised in that the sensing terminals are the first sensing terminals, described
The first terminal section also include the second sensing terminals, the current sensing element be connected in first and second sensing terminals it
Between, and the electric current in response to flowing through the conductive winding is configured so that, between first and second sensing terminals
Voltage difference and the current in proportion.
3. magnetic devices according to claim 2, it is characterised in that first sensing terminals and the described second sensing end
Son is spaced apart by the recess, and the recess is limited by the conductive winding.
4. magnetic devices according to claim 2, it is characterised in that the current sensing element is by the first end sub-district
Section is divided into Part I and Part II, first sensing terminals-positioned along the Part I, and second sensing
Terminal is positioned along the Part II.
5. magnetic devices according to claim 1, it is characterised in that the input/output terminal has than the sensing
The bigger cross-sectional area of the cross-sectional area of terminal.
6. magnetic devices according to claim 1, it is characterised in that the magnetic core, which has, is limited to opening therein, and
And the sensing section is arranged in the opening.
7. magnetic devices according to claim 6, it is characterised in that the current sensing element is arranged on the opening
It is outside.
8. a kind of printed circuit-board assembly, including：
Printed circuit board (PCB)；And
Magnetic devices, it is connected to the printed circuit board (PCB), and the magnetic devices include：
Magnetic core；And
Conductive winding, it is inductively connected to the magnetic core, and the conductive winding includes the first terminal section, Second terminal area
Section, serially linked sensing section, wherein described the first terminal section between the first and second terminals section include
Sensing terminals and the input/output terminal being spaced apart with the sensing terminals by recess, the recess are limited by conductive winding, with
And current sensing element, the current sensing element is extended across the input/output terminal and the sensing terminals, and has
There is the resistivity bigger than the resistivity of the conductive winding, wherein recess extension is at least partially into the current sense
Element, wherein the first and second terminals section be configured to the magnetic core and the printed circuit board (PCB) is spaced apart.
9. printed circuit-board assembly according to claim 8, it is characterised in that the distance is more than the conductive winding
Thickness.
10. printed circuit-board assembly according to claim 8, it is characterised in that the sensing terminals are the first sensing end
Son, the first terminal section also includes the second sensing terminals, and the current sensing element is connected in first and second sense
Survey between terminal, and be configured so that the electric current in response to flowing through the conductive winding, in the described first and second sensings
Voltage difference and the current in proportion between terminal.
11. printed circuit-board assembly according to claim 10, it is characterised in that the current sensing element is by described
One end sub-segments are divided into Part I and Part II, and first sensing terminals are positioned along the Part I, and described
Second sensing terminals are positioned along the Part II.
12. printed circuit-board assembly according to claim 10, it is characterised in that the input/output terminal have than
The bigger cross-sectional area of the cross-sectional areas of the sensing terminals.
13. a kind of method for assembling magnetic devices, methods described includes：
Magnetic core is provided；
Conductive winding is provided, the conductive winding includes the first terminal section, Second terminal section and electrically connected in series
Sensing section between the first and second terminals section, wherein the first terminal section include sensing terminals and with it is described
The input/output terminal that sensing terminals are spaced apart by recess, the recess is limited by conductive winding；
Electrically connect current sensing element in the first terminal section, the current sensing element be extended across the input/
Lead-out terminal and the sensing terminals, and with the resistivity bigger than the resistivity of the conductive winding, wherein the recess
Extension is at least partially into the current sensing element；And
The conductive winding is inductively connected to the magnetic core.
14. the method for assembling magnetic devices according to claim 13, it is characterised in that the magnetic core, which has, is limited to it
In opening, wherein inductively couple the conductive winding include by it is described sensing section be positioned in the opening.
15. the method for assembling magnetic devices according to claim 14, it is characterised in that also including by the current sense
Element is positioned at the outside of the opening.
16. the method for assembling magnetic devices according to claim 13, it is characterised in that methods described also includes：
Printed circuit board (PCB) is provided；And
The first terminal section and the Second terminal section are connected to the printed circuit board (PCB) so that the magnetic core and institute
State that printed circuit board (PCB) is spaced apart, the distance is more than the thickness of the conductive winding.
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| Application Number | Priority Date | Filing Date | Title |
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| US201361805755P | 2013-03-27 | 2013-03-27 | |
| US61/805755 | 2013-03-27 | ||
| US14/218093 | 2014-03-18 | ||
| US14/218,093 US9171667B2 (en) | 2013-03-27 | 2014-03-18 | Magnetic device having integrated current sensing element and methods of assembling same |
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| CN104078194B true CN104078194B (en) | 2017-10-13 |
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| US10541063B2 (en) | 2015-08-11 | 2020-01-21 | Bel Fuse (Macao Commercial Offshore) Limited | Power inductor |
| JP6604183B2 (en) * | 2015-12-16 | 2019-11-13 | 富士電機株式会社 | Semiconductor module |
| KR101952866B1 (en) | 2017-02-22 | 2019-02-27 | 삼성전기주식회사 | Power inductor, board having the same, and current measurement method using the same |
| US10438730B2 (en) * | 2017-10-31 | 2019-10-08 | Cyntec Co., Ltd. | Current sensing resistor and fabrication method thereof |
| US11387039B2 (en) | 2019-02-13 | 2022-07-12 | Astronics Advanced Electronic Systems Corp. | Integrated transformer with low AC losses and impedance balanced interface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763872A (en) * | 2004-10-22 | 2006-04-26 | 胜美达集团株式会社 | Magnetic element |
| CN101536124A (en) * | 2006-09-27 | 2009-09-16 | 韦沙戴尔电子公司 | Inductor with thermally stable resistance |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763872A (en) * | 2004-10-22 | 2006-04-26 | 胜美达集团株式会社 | Magnetic element |
| CN101536124A (en) * | 2006-09-27 | 2009-09-16 | 韦沙戴尔电子公司 | Inductor with thermally stable resistance |
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