CN203055590U - Electromagnetic actuator - Google Patents
Electromagnetic actuator Download PDFInfo
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- CN203055590U CN203055590U CN 201220743483 CN201220743483U CN203055590U CN 203055590 U CN203055590 U CN 203055590U CN 201220743483 CN201220743483 CN 201220743483 CN 201220743483 U CN201220743483 U CN 201220743483U CN 203055590 U CN203055590 U CN 203055590U
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- iron core
- moving iron
- spring plate
- coil
- electromagnetic actuator
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Abstract
The utility model discloses an electromagnetic actuator in the field of active noise control. The electromagnetic actuator comprises a support installed on the surface of a transformer. The top and the bottom of the support are respectively and correspondingly provided with an annular inner step. The two inner steps are respectively provided with an upper spring plate and a lower spring plate. An upper movable iron core, permanent magnet magnetic steel and a lower movable iron core are sequentially arranged between the upper spring plate and the lower spring plate from top to bottom. The upper spring plate, the upper movable iron core, the permanent magnet magnetic steel, the lower movable iron core and the lower spring plate are connected in series through a screw and are fixed through nuts at two ends of the screw. The outer periphery of the upper movable iron core and the outer periphery of the lower movable iron core are respectively wound by an upper coil and a lower coil. The upper coil and the lower coil are reversely connected in series and then connected with a control power source. The electromagnetic actuator is simple in structure, low in manufacturing cost, adjustable in modality, convenient to install, flexible and capable of being used for noise elimination of the transformer.
Description
Technical field
The utility model relates to a kind of active noise controller, particularly a kind of noise ACTIVE CONTROL actuator.
Background technology
The acoustical treatment of traditional control noise mainly contains methods such as sound absorption, sound insulation and use muffler, and these modes are referred to as the control of " passive " noise, and in general, they are only effective to the control of high-frequency noises., roentgen Paul Leug(1898～1979 in 1933) patent that proposes " is eliminated the process of sound vibration ", has started the beginning of Active noise control using (Active Noise Control) research.The Active noise control using technology is good at the control of low-frequency noise, complementary extremely strong with the control of no source noise.Active noise control using can be divided into active acoustic control system and Active Force control.Active acoustic control system is to produce a secondary sound field with secondary sound source, thereby offsets elementary noise, namely " eliminates the noise with sound ".Have quite a few noise to be because structural vibration is radiation-induced, also just controlled acoustic radiation or the sound transmission of structure with the vibration of secondary power source control structure, the method that noise is controlled in the secondary power of this employing source is exactly that Active Force is controlled.Secondary power source is also referred to as moving device, actuator choose the quality that is directly determining to control effect.
The actuator that is used for the active noise ACTIVE CONTROL traditionally mainly contains following two kinds:
1. magnetostrictive actuator.Its operation principle is that magnetostrictive material produce magnetostrictive effect under the effect of externally-applied magnetic field.Advantage is that power output is big, dynamic response is fast.Shortcoming is that displacement is little, and magnetostrictive material are very crisp, be difficult to processing, so cost of manufacture is bigger.
2. piezoelectric actuator.Its operation principle is to utilize the inverse piezoelectric effect of piezoelectric, by applying external electrical field, converts electrical energy into the device of mechanical energy, and the reaction time is short, response speed is fast, and frequency response can reach several KHz or higher, drives the efficient height, simple in structure, do not relate to problems such as sealing, leakage, the control precision height.
3. electromagnetic actuator.It is the device that utilizes the electromagnetic force of electromagnetic field to move, the basic principle of electromagnetic actuator is when electric current passes through conductor, can produce corresponding electromagnetic field around it, simultaneously, near electromagnetic field conductor also can be subjected to corresponding attraction or repulsive force, causes the mechanical movement of ferromagnetic material.
Modal electromagnetic actuator can be divided into two kinds: unidirectional electromagnetic actuator and bi-directional electromagnetic actuator.Fig. 4 is the structural principle sketch of unidirectional electromagnetic actuator, and it is made up of spring 13, armature 14, permeability magnetic material 15 and magnet exciting coil 16.When starting working, armature 14 keeps balance under self gravitation and spring 13 elastic force, when giving magnet exciting coil 16 energisings, armature 14 moves under the acting in conjunction of the suction that is subjected to magnetic field and spring 13 power, by the size of controlled amount magnetic field force processed of control exciting current, thus the suffered power of adjustment armature 14.Fig. 5 is the structural principle sketch of bi-directional electromagnetic actuator, and is similar with the principle of unidirectional electromagnetic actuator, and different is, and it controls the size and Orientation of the suffered electromagnetic force of armature 14 by the size of adjusting two magnet exciting coil 16 exciting currents.This electromagnetic actuator has compact conformation, is quick on the draw, contactless friction, unlubricated, low in energy consumption, response is fast, control is big, adapt to bandwidth, output displacement and power output is big, controllability is good advantage, is widely used in fields such as construct noise ACTIVE CONTROL, Active Vibration Control, electromagnetic suspension, contactless high-precision navigation system.But there are shortcomings such as power factor (PF) is low, power density is low in this kind actuator.
At home, a kind of energy-saving resonance type electric actuator is now disclosed, its publication number is: CN101710777A, traditional electromagnetic actuator is improved, and improved efficient, but the electric actuator structure described in this technical scheme is very complicated, yoke, base and magnet steel are combined by a plurality of parts, and be complex-shaped, processes the comparison difficulty, be slidingly connected by bearing between moving iron core and the base, cost height, the accuracy of manufacture require high.From the angle of work done, live part is the shared space of coil and air gap, and this only is the sub-fraction of total height, makes that the power density of this actuator is lower the ratio of volume or weight (power with).Therefore, also need this type of electromagnetic actuator is further improved, this actuator structure is fixed in addition, mode fixes, can not be according to the mode of being adjusted self by the mode of control structure in noise control.
The utility model content
The purpose of this utility model provides a kind of electromagnetic actuator, has solved deficiency of the prior art, and it is simple in structure, make with low cost, the power density height, mode is adjustable, easy for installation flexibly.
The purpose of this utility model is achieved in that a kind of electromagnetic actuator, comprise the bearing that is installed in the transformer surface, the top of described bearing offers the interior step of corresponding annular with the bottom, be respectively arranged with upper spring plate and lower spring plate on the two described interior steps, from top to bottom be disposed with moving iron core between described upper spring plate and the lower spring plate, permanent magnetic steel and following moving iron core, described upper spring plate, go up moving iron core, permanent magnetic steel, moving iron core and lower spring plate are cascaded through screw rod down, and the nut through the screw rod two ends is fixed together, described moving iron core and down the periphery of moving iron core be arranged with coil and lower coil respectively, describedly go up after coil and the lower coil differential concatenation and control power supply and link to each other.
During the utility model work, after last coil, lower coil feed alternating current, upward moving iron core, following moving iron core are subjected to the electromagnetic excitation power effect that the cycle changes, the resistance that overcomes latch plate is reciprocating, by the control frequency of voltage/current and amplitude vibration frequency and the amplitude with regard to the controllable brake iron core, thereby produce corresponding reaction force at bearing, be transferred on the transformer through bearing, reach the purpose of eliminating noise.Compared with prior art, the beneficial effects of the utility model are: the utility model will be gone up unshakable in one's determination, down moving iron core, permanent magnetic steel, cushion block and latch plate by screw rod, nut and connect as one, process structure is simple, low cost of manufacture, to move unshakable in one's determination and static bearing by latch plate up and down links to each other, by four installing holes in bearing bottom surface bearing is connected convenient and flexible installation with the transformer surface that needs to reduce noise and vibration; In the course of work, by the thickness that changes latch plate and the mode of oscillation that modulus of elasticity changes electromagnetic actuator, can do corresponding mode adjustment according to the transformer of different structure, increase its scope of application, improve its result of use; The permanent magnetic steel that is installed between moving iron core and the following moving iron core provides the air-gap field of electromagnetic actuator, thereby has improved power factor and the power density of actuator.The utility model can be used in the transformer de-noising.
For fear of between nut and the upper spring plate, between upper spring plate and the last moving iron core, between nut and the lower spring plate, lower spring plate and produce the gap between the moving iron core down, thereby the stability of influence vibration, be provided with the bullet pad between described screw rod top nut and last moving iron core, the following moving iron core, between described upper spring plate and the last moving iron core, lower spring plate and down be provided with cushion block between the moving iron core, described cushion block is sleeved on the screw rod.
More reliable and more stable for the vibration of feasible moving iron core and following moving iron core, described upward coil is corresponding with last moving iron core air gap, and described lower coil is corresponding with following moving iron core air gap.
In order to make the dismounting of this device convenient, there are four installing holes described bearing bottom surface, by installing hole bearing is connected with the transformer surface.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is Fig. 1 vertical view.
Fig. 3 is loop construction schematic diagram in the utility model.
Fig. 4 is unidirectional electromagnetic actuator structural representation.
Fig. 5 is bi-directional electromagnetic actuator structural representation.
Wherein, 1 bearing, 2 upper spring plates, coil on 3, moving iron core on 4,5 permanent magnetic steels, 6 times moving iron cores, 7 lower spring plates, 8 screw rods, 9 nuts, 10 bullet pads, 11 cushion blocks, 12 lower coil, 13 springs, 14 armature, 15 permeability magnetic materials, 16 magnet exciting coils.
Embodiment
A kind of electromagnetic actuator as Figure 1-3, comprise the bearing 1 that is installed in the transformer surface, the top of bearing 1 offers the interior step of corresponding annular with the bottom, be respectively arranged with upper spring plate 2 and lower spring plate 7 on the step in two, from top to bottom be disposed with moving iron core 4 between upper spring plate 2 and the lower spring plate 7, permanent magnetic steel 5 and following moving iron core 6, upper spring plate 2, go up moving iron core 4, permanent magnetic steel 5, moving iron core 6 and lower spring plate 7 are cascaded through screw rod 8 down, and the nut 9 through screw rod 8 two ends is fixed together, the periphery that goes up moving iron core 4 and following moving iron core 6 is arranged with coil 3 and lower coil 12 respectively, last coil 3 is corresponding with last moving iron core 4 air gaps, lower coil 12 is with moving iron core 6 air gaps are corresponding down, link to each other with the control power supply after last coil 3 and lower coil 12 differential concatenations, screw rod 8 top nuts 9 and last moving iron core 4, be provided with bullet pad 10 between the moving iron core 6 down, between upper spring plate 2 and the last moving iron core 4, be provided with cushion block 11 between lower spring plate 7 and the following moving iron core 6, cushion block 11 is sleeved on the screw rod 8.
During the utility model work, after last coil 3, lower coil 12 feed alternating current, upward moving iron core 4, following moving iron core 6 are subjected to the electromagnetic excitation power effect that the cycle changes, the resistance that overcomes upper spring plate 2 and lower spring plate 7 is reciprocating, thereby produce corresponding reaction force at bearing 1, be transferred on the transformer through bearing 1, reach the purpose of eliminating noise; Be arranged on the bullet pad 10 between screw rod 8 top nuts 9 and last moving iron core 4, the following moving iron core 6, between upper spring plate 2 and the last moving iron core 4, lower spring plate 7 and the following cushion block 11 between the moving iron core 6, avoid between nut 9 and the upper spring plate 2, between upper spring plate 2 and the last moving iron core 4, between nut 9 and the lower spring plate 7, lower spring plate 7 and produce the gap between the moving iron core 6 down, improved the stability of vibration.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection range of the present utility model.
Claims (4)
1. electromagnetic actuator, comprise the bearing that is installed in the transformer surface, it is characterized in that, the top of described bearing offers the interior step of corresponding annular with the bottom, be respectively arranged with upper spring plate and lower spring plate on the two described interior steps, from top to bottom be disposed with moving iron core between described upper spring plate and the lower spring plate, permanent magnetic steel and following moving iron core, described upper spring plate, go up moving iron core, permanent magnetic steel, moving iron core and lower spring plate are cascaded through screw rod down, and the nut through the screw rod two ends is fixed together, described moving iron core and down the periphery of moving iron core be arranged with coil and lower coil respectively, describedly go up after coil and the lower coil differential concatenation and control power supply and link to each other.
2. a kind of electromagnetic actuator according to claim 1, it is characterized in that, be provided with the bullet pad between described screw rod top nut and last moving iron core, the following moving iron core, between described upper spring plate and the last moving iron core, lower spring plate and down be provided with cushion block between the moving iron core, described cushion block is sleeved on the screw rod.
3. a kind of electromagnetic actuator according to claim 1 and 2 is characterized in that, described upward coil is corresponding with last moving iron core air gap, and described lower coil is with moving iron core air gap is corresponding down.
4. a kind of electromagnetic actuator according to claim 1 and 2 is characterized in that, there are four installing holes described bearing bottom surface, by installing hole bearing is connected with the transformer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743483 CN203055590U (en) | 2012-12-31 | 2012-12-31 | Electromagnetic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743483 CN203055590U (en) | 2012-12-31 | 2012-12-31 | Electromagnetic actuator |
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| Publication Number | Publication Date |
|---|---|
| CN203055590U true CN203055590U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220743483 Expired - Lifetime CN203055590U (en) | 2012-12-31 | 2012-12-31 | Electromagnetic actuator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050216A (en) * | 2012-12-31 | 2013-04-17 | 东南大学 | Electromagnetic actuator for active noise control for amorphous alloy transformers |
| CN104036772A (en) * | 2014-06-04 | 2014-09-10 | 上海兰宝环保科技有限公司 | Magnetostriction noise elimination device and method |
| US20150137914A1 (en) * | 2013-11-18 | 2015-05-21 | Abb Technology Ag | Actuator for medium voltage switchgear |
| CN109459168A (en) * | 2018-09-30 | 2019-03-12 | 江苏大学 | A kind of electromagnetic balance formula pull pressure sensor |
| CN112737277A (en) * | 2020-12-30 | 2021-04-30 | 青岛理工大学 | Magnetic suspension inertial actuator capable of reducing eddy current effect and method |
-
2012
- 2012-12-31 CN CN 201220743483 patent/CN203055590U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050216A (en) * | 2012-12-31 | 2013-04-17 | 东南大学 | Electromagnetic actuator for active noise control for amorphous alloy transformers |
| US20150137914A1 (en) * | 2013-11-18 | 2015-05-21 | Abb Technology Ag | Actuator for medium voltage switchgear |
| CN104658819A (en) * | 2013-11-18 | 2015-05-27 | Abb技术股份公司 | Actuator for medium voltage switchgear |
| US9478342B2 (en) * | 2013-11-18 | 2016-10-25 | Abb Schweiz Ag | Actuator for medium voltage switchgear |
| CN104658819B (en) * | 2013-11-18 | 2017-09-15 | Abb技术股份公司 | Actuator for medium-voltage switchgear |
| CN104036772A (en) * | 2014-06-04 | 2014-09-10 | 上海兰宝环保科技有限公司 | Magnetostriction noise elimination device and method |
| CN109459168A (en) * | 2018-09-30 | 2019-03-12 | 江苏大学 | A kind of electromagnetic balance formula pull pressure sensor |
| CN112737277A (en) * | 2020-12-30 | 2021-04-30 | 青岛理工大学 | Magnetic suspension inertial actuator capable of reducing eddy current effect and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |