CN205983052U - Electric tool - Google Patents
Electric tool Download PDFInfo
- Publication number
- CN205983052U CN205983052U CN201620945998.7U CN201620945998U CN205983052U CN 205983052 U CN205983052 U CN 205983052U CN 201620945998 U CN201620945998 U CN 201620945998U CN 205983052 U CN205983052 U CN 205983052U
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- 239000011810 insulating material Substances 0.000 claims abstract description 4
- 239000004065 semiconductor Substances 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 abstract 1
- 230000005669 field effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model discloses an electric tool, include: the motor turns into mechanical energy with the electric energy, the power is for the motor power supply, circuit component, control motor and/or power and circuit board, electric connection power and motor contain: circuit component is connected to the line layer, the basic unit, the support circuit board, and the insulating layer, make by insulating material, wherein, line layer and basic unit make by conducting material, the insulating layer sets up between line layer and insulating layer so that the line layer is insulating with the basic unit. This electric tool can reduce calorific capacity of circuit board and circuit component relatively through great electric current the time.
Description
Technical Field
The utility model relates to an electric tool, concretely relates to electric tool with power consumption device.
Background
In the case of an electric tool, the circuit board and the motor are generally disposed in a housing of the electric tool, and the circuit board drives the motor to operate to implement the operation of the electric tool. In addition, for the hand-held electric tool, it is desirable to reduce the size of the electric tool as much as possible for the convenience of the user, and the size of the electric tool is generally limited by the size of the internal circuit board.
SUMMERY OF THE UTILITY MODEL
In order to overcome the great defect of circuit board size among the current electric tool, the utility model discloses a following technical scheme:
a power tool, comprising: a motor having a plurality of connection terminals; the high-voltage driving end is electrically connected to one of the wiring terminals; the low-voltage driving end is electrically connected to the other wiring terminal; the power supply device enables a potential difference to be generated between the high-voltage driving end and the low-voltage driving end; the power chip enables one wiring terminal to be electrically connected with at least one of the high-voltage driving end and the low-voltage driving end; and the controller is used for sending a control signal to the power chip.
Wherein, the power chip includes: the high-voltage connecting end is electrically connected to the high-voltage driving end; the low-voltage connecting end is electrically connected to the low-voltage connecting end; the motor connecting end is electrically connected to one wiring terminal in the motor; the control end is electrically connected to the controller; the controller has a first control state in which the high voltage connection terminal is conducted to the motor connection terminal and a second control state in which the low voltage connection terminal is conducted to the motor connection terminal.
The electric tool as described above, characterized in that: the electric tool comprises three power chips; the motor comprises three wiring terminals; the motor connecting ends of the three power chips are respectively and electrically connected to the three wiring terminals; the high-voltage connecting ends of the three power chips are connected to the high-voltage driving end; the low-voltage connecting ends of the three power chips are connected to the low-voltage driving end.
The electric tool as described above, characterized in that: the motor is a brushless motor.
The electric tool as described above, characterized in that: the control ends of the three power chips are electrically connected to the same controller.
The electric tool as described above, characterized in that: each power chip has two control terminals.
The electric tool as described above, characterized in that: the controller also has a third control state in which the high voltage connection and the low voltage connection are not in communication with the motor connection.
The electric tool as described above, characterized in that: the power chip includes a plurality of semiconductor units; each semiconductor unit comprises a grid electrode, a source electrode and a drain electrode; the gate of each semiconductor unit serves as a control terminal of the power chip.
The electric tool as described above, characterized in that: the electric tool comprises two power chips; the motor comprises two wiring terminals; the motor connecting ends of the two power chips are respectively and electrically connected to the two wiring terminals; the high-voltage connecting ends of the two power chips are connected to the high-voltage driving end; the low-voltage connecting ends of the two power chips are connected to the low-voltage driving end.
The electric tool as described above, characterized in that: the electric power tool further includes: a circuit board for mounting a power chip; the circuit board includes: a base layer made of a metal material; an insulating layer made of an insulating material; a circuit layer made of a metal material; the insulating layer insulates the base layer from the circuit layer, and the circuit layer is electrically connected to the power chip.
The utility model discloses an useful part lies in: the utility model discloses an among the electric tool, power chip's motor link can selectively connect motor line terminal, has effectively reduced the circuit board size, and then has reduced the electric tool size, convenience of customers operation.
Drawings
Fig. 1 is a schematic structural view of an electric power tool of the present invention;
fig. 2 is a schematic structural view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another embodiment of the present invention;
fig. 4 is a schematic structural view of another embodiment of the present invention;
fig. 5 is a schematic structural diagram of the power chip in fig. 4.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides an electric tool. Fig. 1 is a schematic structural view of the electric power tool of the present invention. Referring to fig. 1, the power tool 1 includes at least: the power supply device 100, the motor 200, and the circuit board 300 are not limited thereto, and may further include a transmission system 400, an actuator system 500, and the like. The power supply device 100 may be an ac power connected to an external utility grid, or may be a battery pack. The motor 200 is electrically connected to the circuit board 300, the motor 200 has a plurality of terminals, and preferably, the motor 200 is a brushless motor. As shown in fig. 1, the electric power tool 1 may be a garden-type electric power tool such as a mower, a blower, or a hand-held electric power tool such as a drill shown in fig. 1, and is particularly suitable for a small-sized portable hand-held electric power tool.
Fig. 2 is a schematic structural diagram of an electric tool according to an embodiment, including: motor 200 with a plurality of wiring terminals and high-voltage driving end H for electrically connecting one wiring terminal of motoraAnd a low-voltage driving end L for electrically connecting the other terminal of the motoraA power supply device 100 for generating a potential difference between the high-voltage driving terminal and the mortgage driving terminal, a power chip 302 and a controller 301, wherein,
the power supply device 100 is used for driving the high-voltage end HaAnd a low voltage drive end LaThe power supply device 100 may be an alternating current connected to an external utility grid, or a battery pack.
A power chip 302 for connecting a terminal of the motor 200 with the high-voltage drive terminal HaAnd a low voltage drive end LbForm the electrical connection among at least one; the power chip 302 includes a high voltage connection terminal HbLow voltage connection end LbA control terminal and a motor connecting terminal, wherein the high-voltage connecting terminal HbElectrically connected with the high-voltage driving end HaLow voltage connection terminal LbElectrically connected with the low-voltage driving end LaThe control terminal is electrically connected to the controller 301And receives a control signal from the controller 301, so that the motor connection terminal is electrically connected to one of the connection terminals of the motor.
As a possible implementation, the power chip 302 may include a plurality of semiconductor units, each of which may be a MOS transistor including a gate, a source, and a drain, each of which serves as a control terminal of the power chip; each semiconductor unit can also be a triode and comprises a base electrode, a collector electrode and an emitter electrode, and the base electrode of each triode is used as a control terminal of the power chip.
A controller 301 for sending control signals to the power chip 302, specifically, the controller 301 has a high voltage connection terminal HbA first control state for connecting with the motor connection end and a second control state for connecting the low voltage connection end with the motor connection end, the controller 301 sends a control signal to the power chip 302, and when the control signal is for connecting the high voltage connection end HbWhen the first control state that switches on with the motor link, this high voltage connection of motor link electric connection, it should be noted that, to same motor binding post, in same control signal, one of following three kinds of possible circumstances exist to the same binding post's of this motor mode of connection: a non-conductive state in which the high voltage connection terminal is electrically connected, the low voltage connection terminal is electrically connected, or neither the high voltage terminal nor the low voltage terminal is connected, and specifically, the controller 301 may have at least one signal output port.
Referring to fig. 3, as a possible implementation, the motor 200 has two terminals, the circuit board 300 has two power chips 302 and 302 ', the high voltage terminals of the two power chips 302 and 302 ' are both connected to the high voltage driving terminal of the circuit board 300, the low voltage terminals are both connected to the low voltage driving terminal of the circuit board 300, the control terminals of the power chips 302 and 302 ' are both electrically connected to the same controller 301, the controller 301 sends a first control status signal for conducting the high voltage terminal of the power chip 302 to one terminal of the motor 200, and sends a second control status signal for conducting the low voltage terminal of the power chip 302 ' to the other terminal of the motor, under the driving of the control signals, the current flowing through the circuit board 300 enters one terminal of the motor 200 through the high voltage terminal of the power chip 302 and then flows through the low voltage terminal of the power chip 302 ' through the other terminal of the motor 200, a closed loop is formed, the motor 200 is driven to rotate, and if the motor 200 needs to be controlled to rotate reversely, only the control signal sent by the controller 301 needs to be changed: at this time, a second control state signal for connecting the low-voltage connection terminal of the power chip 302 with one connection terminal of the motor 200 is sent out, and a first control state signal for connecting the high-voltage connection terminal of the power chip 302' with the other connection terminal of the motor is sent out. As a possible implementation, each power chip may have two control terminals, wherein one control terminal receives the first control state signal and the other control terminal receives the second control state signal. Because the motor connecting end of the power chip can be selectively connected with the motor connecting terminal, the number of the original power chips is reduced, the size of a circuit board can be effectively reduced, and the power chip is particularly suitable for the requirements of small-sized hand-held electric tools.
Referring to fig. 4, as a possible implementation, the motor 200 is a three-phase motor having three A, B, C terminals, the circuit board 300 has three power chips 302, 302 ', and 302 ″, the high voltage terminals of the three power chips 302, 302', and 302 ″, all of which are connected to the high voltage terminal of the circuit board 300, the low voltage terminals of which are connected to the low voltage terminal of the circuit board 300, the control terminals of the three power chips 302, 302 ', and 302 ″, all of which are electrically connected to the same controller 301, the controller 301 sends a first control status signal for conducting the high voltage terminal of the power chip 302 to the motor terminal a, and simultaneously sends a second control signal for conducting the low voltage terminal of the power chip 302' to the motor terminal B, and under the drive of the control signals, the rotation of the motor 200 from the a phase to the B phase is realized, and if the rotation of the motor 200 from the B phase to the a phase is to, only the control signal sent by the controller 301 needs to be changed: at this time, a second control state signal for switching on the low-voltage connecting end of the power chip 302 and the motor connecting terminal A is sent out, and a first control signal for switching on the high-voltage connecting end of the power chip 302' and the motor connecting terminal B is sent out simultaneously. To further explain the principle that the controller controls the circuit board to drive the three-phase motor to work, three control states of the controller are defined as follows: make first control state 1 that power chip high voltage connection end and motor connection end switched on, make second control state 0 that power chip low pressure connection end and motor connection end switched on and make power chip high voltage connection end and low pressure connection end all not with the third control state x that motor connection end switched on, the control signal that the controller sent and the three-phase machine rotation condition see the following table:
compare in current adoption 6 power switch drive three-phase motor work, in this embodiment, the motor connection end of power chip can connect motor line terminal selectively, only needs 3 power chips can replace original 6 power switch, has effectively reduced the circuit board size, is particularly useful for small-size hand-held type electric tool's demand.
Referring to fig. 5, a schematic diagram of the power chip in fig. 4 is exemplarily shown, where the power chip is composed of two fets, and a drain of one fet serves as a high-voltage connection terminal V of the power chipinThe source electrode of the motor is electrically connected with the drain electrode of the other field effect transistor, and a motor connecting end V is arranged on the connecting line of the source electrode and the drain electrode of the two field effect transistorsswThe source electrode of the other field effect tube is used as a low-voltage connecting end GND of the power chip, and the grid electrodes of the two field effect tubes are respectively used as two control ends T of the power chipG、BGThe bearable voltage range between the high-voltage connecting end and the low-voltage connecting end of the power chip is 35V-65V, the bearable thermal resistance range of the power chip is 0.5 ℃/W-5 ℃/W, the thermal resistance represents the temperature rise caused by 1W heat, and the internal resistance of each field effect tube can reach the magnitude of m omega.
As one of possible embodiments, the power tool further includes a circuit board 300 for mounting the power chip, the circuit board 300 including a base layer made of a metal material, an insulating layer made of an insulating material, and a wiring layer made of a metal material, wherein the insulating layer insulates the base layer from the wiring layer, and the wiring layer is electrically connected to the power chip. Preferably, the circuit board is an aluminum substrate.
In another embodiment, the electric tool comprises an electric device with a plurality of connecting terminals, and a high-voltage driving end electrically connected to one of the connecting terminals; the low-voltage driving end and the power supply device are electrically connected to the other connecting terminal, so that a potential difference is generated between the high-voltage driving end and the low-voltage driving end; the power chip enables one wiring terminal to be electrically connected with at least one of the high-voltage driving end and the low-voltage driving end; the controller is used for sending a control signal to the power chip; wherein the power chip includes: the high-voltage connecting end is electrically connected to the high-voltage driving end; the low-voltage connecting end is electrically connected to the low-voltage connecting end; the electric device connecting end is electrically connected to one of the wiring terminals in the electric device; the control end is electrically connected to the controller; the controller has a first control state for connecting the high-voltage connection end with the electric device connection end and a second control state for connecting the low-voltage connection end with the electric device connection end.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. An electric power tool, characterized by comprising:
a motor having a plurality of connection terminals;
the high-voltage driving end is electrically connected to one of the wiring terminals;
the low-voltage driving end is electrically connected to the other wiring terminal;
a power supply device for generating a potential difference between the high-voltage driving terminal and the low-voltage driving terminal;
the power chip enables one wiring terminal to be electrically connected with at least one of the high-voltage driving end and the low-voltage driving end;
the controller is used for sending a control signal to the power chip;
wherein,
the power chip includes:
the high-voltage connecting end is electrically connected to the high-voltage driving end;
the low-voltage connecting end is electrically connected to the low-voltage connecting end;
the motor connecting end is electrically connected to one wiring terminal in the motor;
the control end is electrically connected to the controller;
the controller has a first control state in which the high-voltage connection terminal is conducted to the motor connection terminal and a second control state in which the low-voltage connection terminal is conducted to the motor connection terminal.
2. The power tool of claim 1, wherein:
the power tool comprises three power chips;
the motor comprises three wiring terminals;
the motor connecting ends of the three power chips are respectively and electrically connected to the three wiring terminals;
the high-voltage connecting ends of the three power chips are connected to the high-voltage driving end;
and the low-voltage connecting ends of the three power chips are connected to the low-voltage driving end.
3. The power tool of claim 2, wherein:
the motor is a brushless motor.
4. The power tool of claim 2, wherein:
the control ends of the three power chips are electrically connected to the same controller.
5. The electric power tool according to any one of claims 1 to 3, characterized in that:
each power chip is provided with two control terminals.
6. The electric power tool according to any one of claims 1 to 3, characterized in that:
the controller also has a third control state in which the high voltage connection terminal and the low voltage connection terminal are not in conduction with the motor connection terminal.
7. The electric power tool according to any one of claims 1 to 3, characterized in that:
the power chip includes a plurality of semiconductor units; each semiconductor unit comprises a grid electrode, a source electrode and a drain electrode; the grid electrode of each semiconductor unit is used as a control end of the power chip.
8. The electric power tool according to any one of claims 1 to 3, characterized in that:
the power supply device enables the voltage between the high-voltage driving end and the low-voltage driving end to be in a range of 35V to 65V.
9. The power tool according to any one of claims 1, wherein:
the power tool comprises two power chips;
the motor comprises two connecting terminals;
the motor connecting ends of the two power chips are respectively and electrically connected to the two wiring terminals;
the high-voltage connecting ends of the two power chips are connected to the high-voltage driving end;
and the low-voltage connecting ends of the two power chips are connected to the low-voltage driving end.
10. The power tool of claim 1, wherein:
the electric power tool further includes:
a circuit board for mounting the power chip;
the circuit board includes:
a base layer made of a metal material;
an insulating layer made of an insulating material;
a circuit layer made of a metal material;
the insulating layer insulates the base layer from the circuit layer, and the circuit layer is electrically connected to the power chip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016100700826 | 2016-02-01 | ||
| CN201610070082 | 2016-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205983052U true CN205983052U (en) | 2017-02-22 |
Family
ID=58036447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620945998.7U Active CN205983052U (en) | 2016-02-01 | 2016-08-25 | Electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205983052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702111A (en) * | 2017-05-17 | 2018-10-23 | 深圳和而泰智能控制股份有限公司 | A kind of brushless electric tool |
| WO2021081825A1 (en) * | 2019-10-30 | 2021-05-06 | 南京德朔实业有限公司 | Alternating current electric tool |
-
2016
- 2016-08-25 CN CN201620945998.7U patent/CN205983052U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702111A (en) * | 2017-05-17 | 2018-10-23 | 深圳和而泰智能控制股份有限公司 | A kind of brushless electric tool |
| WO2018209605A1 (en) * | 2017-05-17 | 2018-11-22 | 深圳和而泰智能控制股份有限公司 | Brushless electric tool |
| WO2021081825A1 (en) * | 2019-10-30 | 2021-05-06 | 南京德朔实业有限公司 | Alternating current electric tool |
| CN115004523A (en) * | 2019-10-30 | 2022-09-02 | 南京泉峰科技有限公司 | AC electric tool |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Patentee after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee before: NANJING CHERVON INDUSTRY Co.,Ltd. |