CN210867554U - Power PMOS tube driving circuit and driving circuit for three-phase motor - Google Patents
Power PMOS tube driving circuit and driving circuit for three-phase motor Download PDFInfo
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- CN210867554U CN210867554U CN201922355377.XU CN201922355377U CN210867554U CN 210867554 U CN210867554 U CN 210867554U CN 201922355377 U CN201922355377 U CN 201922355377U CN 210867554 U CN210867554 U CN 210867554U
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Abstract
The utility model discloses a power PMOS manages drive circuit and is used for three phase motor's drive circuit, include: resistors R1, R2, R3 and R4, NPN type triodes T1, T2, T4 and T5, PNP type triodes T3 and diodes D1 and D2; the base of T1 is connected to the input end through R1, the emitter is grounded, and the collector is connected to the base of T3; one end of R2 is connected to the base of T1, and the other end is grounded; the emitter of the T3 is connected to the collector of the T5, and the collector is connected to the base of the T5; the emitter of the T5 is grounded, and the base is grounded through the R4; the collector of the T2 is connected to VCC, the base is connected to VCC through R3, and the emitter is connected to the base of T4; the anode of D1 is connected to the base of T2, and the cathode is connected to the base of T3; the positive electrode of D2 is connected to the emitter of T2, and the negative electrode is connected to the base of T3; the T4 has its collector connected to VCC and its emitter connected to the emitter of T3 and acting as an output. The utility model discloses possess current amplification function and level conversion function, can realize that the PMOS switches on the turn-off fast, simple structure, easy processing, low cost.
Description
Technical Field
The utility model belongs to the technical field of drive circuit, concretely relates to power PMOS manages drive circuit and is used for three-phase motor's drive circuit.
Background
The three-phase motor in the prior art is usually driven by PMOS and NMOS tubes, but the three-phase motor is not driven directly by a controller such as an MCU, and a driving circuit of the PMOS tube and the NMOS tube needs to be additionally arranged. In the prior art, discrete devices are usually adopted to realize the driving functions of the PMOS transistor and the NMOS transistor, but this requires a large number of components and is complicated to process.
SUMMERY OF THE UTILITY MODEL
To exist not enough among the prior art, the utility model provides a possess current amplification function and level conversion function, can fast switch's power PMOS pipe drive circuit and be used for three phase motor's drive circuit, its simple structure, the integration of being convenient for, low cost.
The utility model discloses an aspect, power PMOS manages drive circuit, include:
resistors R1, R2, R3 and R4, NPN type triodes T1, T2, T4 and T5, PNP type triodes T3 and diodes D1 and D2; the base electrode of the triode T1 is connected to the driving signal input end through a resistor R1, the emitting electrode is grounded, and the collecting electrode is connected to the base electrode of the triode T3; one end of the resistor R2 is connected to the base electrode of the triode T1, and the other end of the resistor R2 is grounded; the emitter of the transistor T3 is connected to the collector of the transistor T5, and the collector is connected to the base of the transistor T5; the emitter of the triode T5 is grounded, and the base of the triode T5 is grounded through a resistor R4;
the collector of the triode T2 is connected to a power supply terminal VCC, the base of the triode T2 is connected to the power supply terminal VCC through the resistor R3, and the emitter of the triode T4 is connected to the base of the triode T4; the anode of the diode D1 is connected to the base of the transistor T2, and the cathode is connected to the base of the transistor T3; the anode of the diode D2 is connected to the emitter of the transistor T2, and the cathode is connected to the base of the transistor T3; the collector of the triode T4 is connected to a power supply terminal VCC, and the emitter is connected to the emitter of the triode T3 and serves as a driving signal output terminal.
Furthermore, a voltage dividing resistor R5 is connected between the collector of the triode T1 and the base of the triode T3.
Specifically, the resistance of the resistor R1 is 4.5k Ω, the resistance of the resistor R2 is 7.5k Ω, the resistance of the resistor R3 is 6.5k Ω, and the resistance of the resistor R4 is 5k Ω.
The utility model discloses an on the other hand for three-phase motor's drive circuit, including aforementioned any kind of power PMOS pipe drive circuit, still include power NMOS pipe drive circuit, power PMOS pipe drive circuit and power NMOS pipe drive circuit respectively have at least threely, and all integrate on same chip.
Further, the power NMOS transistor driving circuit comprises resistors R6 and R7; one end of the resistor R6 is connected to the driving signal input end, and the other end is connected to the driving signal output end; the resistor R7 has one end connected to ground and the other end connected to the driving signal output terminal.
Compared with the prior art, the utility model discloses following beneficial effect has:
the PMOS tube driving circuit which can be used for a three-phase motor and is convenient to integrate is realized by combining a plurality of resistors, triodes and diodes, and the PMOS tube driving circuit not only has the current amplification function and the level conversion function, but also has better rapid switching capability; meanwhile, the structure is simple, and the cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a medium power PMOS transistor driving circuit of the present invention;
fig. 2 is a schematic structural diagram of the power PMOS transistor driving circuit optimized in the present invention;
fig. 3 is a schematic structural diagram of the medium power NMOS transistor driving circuit of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figures.
The utility model discloses an aspect, power PMOS manages drive circuit, as shown in fig. 1, include:
resistors R1, R2, R3 and R4, NPN type triodes T1, T2, T4 and T5, PNP type triodes T3 and diodes D1 and D2; the base electrode of the triode T1 is connected to the driving signal input end P _ IN through a resistor R1, the emitting electrode is grounded, and the collecting electrode is connected to the base electrode of the triode T3; one end of the resistor R2 is connected to the base electrode of the triode T1, and the other end of the resistor R2 is grounded; the emitter of the transistor T3 is connected to the collector of the transistor T5, and the collector is connected to the base of the transistor T5; the emitter of the triode T5 is grounded, and the base of the triode T5 is grounded through a resistor R4;
the collector of the triode T2 is connected to a power supply terminal VCC, the base of the triode T2 is connected to the power supply terminal VCC through the resistor R3, and the emitter of the triode T4 is connected to the base of the triode T4; the anode of the diode D1 is connected to the base of the transistor T2, and the cathode is connected to the base of the transistor T3; the anode of the diode D2 is connected to the emitter of the transistor T2, and the cathode is connected to the base of the transistor T3; the collector of the transistor T4 is connected to a power supply terminal VCC, and the emitter is connected to the emitter of the transistor T3 and serves as a driving signal output terminal P _ OUT.
The utility model provides a drive circuit, the output is the high level when the input is unsettled, and the output is the high level when input signal is the low level, and the output is the low level when input signal is the high level. The driving signal input end is used for being connected with a grid electrode of the PMOS tube, and the driving signal input end is used for being connected with a controller (such as an MCU). The resistance values of the resistors R1, R2, R3 and R4 can be reasonably selected according to requirements; in particular, the resistor R1 may have a resistance of 4.5k Ω, the resistor R2 may have a resistance of 7.5k Ω, the resistor R3 may have a resistance of 6.5k Ω, and the resistor R4 may have a resistance of 5k Ω. The drive circuit adopts the pull-down resistor R2 to realize that the output end can output high level when the circuit is suspended.
IN the scheme, the working state of the driving circuit, specifically, when the driving signal input terminal P × IN is at a low level, the triode T1 is turned off, and at this time, the base of the triode T3 is at a high level due to the pull-up resistor R3, so that the triodes T3 and T5 are both turned off; meanwhile, the transistors T2 and T4 are in a conducting state, and the driving signal output terminal P _ OUT outputs a high level, which is close to the power supply voltage VCC. At this time, if the driving signal output end P _ OUT is externally connected with the grid electrode of the power PMOS tube, the PMOS tube is in a closed state.
IN another case, when the driving signal input terminal P × IN is at a high level, the transistor T1 is turned on, and at this time, the base of the transistor T3 is at a low level, so that the transistors T3 and T5 are both turned on; meanwhile, the transistors T2 and T4 are in an off state, and the driving signal output terminal P _ OUT outputs a low level, which is close to the GND voltage. At this time, if the driving signal output end P × OUT is externally connected with the grid of the power PMOS transistor, the PMOS transistor is in a conducting state.
The utility model realizes the PMOS drive circuit which can be used for the three-phase motor and is convenient to integrate through the combination of a plurality of resistors, triodes and diodes, and has the current amplification function and the level conversion function as well as better rapid switching capability; meanwhile, the structure is simple, and the cost is low.
As a further optimized solution, as shown in fig. 2, a voltage dividing resistor R5 is further connected between the collector of the transistor T1 and the base of the transistor T3.
In the driving circuit in the scheme, considering the possibility that a general PMOS transistor is damaged if the source-gate voltage is larger than 15V, a resistor R5 is added on the basis of the scheme, and the resistance value of R5 can be set according to the resistance value of R3. When T1 is turned on, resistor R5 divides voltage, so that when VCC is high, it is ensured that the voltage at output terminal P _ OUT is not too low, and the external PMOS transistor is prevented from being damaged.
The utility model discloses an on the other hand, a drive circuit for three-phase motor, as shown in fig. 1-3, including any kind of aforementioned power PMOS pipe drive circuit, still include power NMOS pipe drive circuit, power PMOS pipe drive circuit and power NMOS pipe drive circuit respectively have at least threely, and all integrate on same chip.
The driving circuit for the three-phase motor in the scheme can be integrated on one chip, and the three PMOS circuits and the three NMOS circuits are driven to further drive the three-phase motor. Compared with a driving circuit formed by discrete components in the prior art, the driving circuit is simpler in structure and lower in cost.
As a further optimized solution, as shown in fig. 3, the power NMOS transistor driving circuit includes resistors R6 and R7; one end of the resistor R6 is connected to the driving signal input end N _ IN, and the other end is connected to the driving signal output end N _ OUT; the resistor R7 has one end connected to ground and the other end connected to the driving signal output terminal N x _ OUT.
The NMOS tube driving circuit in the scheme has the advantages that the output end is at a low level when the input end is suspended, the output end is at a low level when the input signal is at the low level, and the output end is at a high level when the input signal is at the high level. Adopt pull-down resistance R6 to realize also can export low level when unsettled in this scheme.
Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. For those skilled in the art, several modifications can be made without departing from the principle of the present invention, and such modifications should also be considered as the protection scope of the present invention.
Claims (5)
1. Power PMOS pipe drive circuit characterized by, includes:
resistors R1, R2, R3 and R4, NPN type triodes T1, T2, T4 and T5, PNP type triodes T3 and diodes D1 and D2; the base electrode of the triode T1 is connected to the driving signal input end through a resistor R1, the emitting electrode is grounded, and the collecting electrode is connected to the base electrode of the triode T3; one end of the resistor R2 is connected to the base electrode of the triode T1, and the other end of the resistor R2 is grounded; the emitter of the transistor T3 is connected to the collector of the transistor T5, and the collector is connected to the base of the transistor T5; the emitter of the triode T5 is grounded, and the base of the triode T5 is grounded through a resistor R4;
the collector of the triode T2 is connected to a power supply terminal VCC, the base of the triode T2 is connected to the power supply terminal VCC through the resistor R3, and the emitter of the triode T4 is connected to the base of the triode T4; the anode of the diode D1 is connected to the base of the transistor T2, and the cathode is connected to the base of the transistor T3; the anode of the diode D2 is connected to the emitter of the transistor T2, and the cathode is connected to the base of the transistor T3; the collector of the triode T4 is connected to a power supply terminal VCC, and the emitter is connected to the emitter of the triode T3 and serves as a driving signal output terminal.
2. The power PMOS transistor driving circuit of claim 1, wherein:
and a voltage division resistor R5 is also connected between the collector of the triode T1 and the base of the triode T3.
3. The power PMOS transistor driving circuit of claim 1, wherein:
the resistance value of the resistor R1 is 4.5k omega, the resistance value of the resistor R2 is 7.5k omega, the resistance value of the resistor R3 is 6.5k omega, and the resistance value of the resistor R4 is 5k omega.
4. Drive circuit for a three-phase motor, characterized by: the power PMOS transistor driving circuit comprises the power PMOS transistor driving circuit as claimed in any one of claims 1 to 3, and further comprises power NMOS transistor driving circuits, wherein at least three power PMOS transistor driving circuits and at least three power NMOS transistor driving circuits are respectively integrated on the same chip.
5. The drive circuit for a three-phase motor according to claim 4, characterized in that:
the power NMOS tube driving circuit comprises resistors R6 and R7; one end of the resistor R6 is connected to the driving signal input end, and the other end is connected to the driving signal output end; the resistor R7 has one end connected to ground and the other end connected to the driving signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922355377.XU CN210867554U (en) | 2019-12-24 | 2019-12-24 | Power PMOS tube driving circuit and driving circuit for three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922355377.XU CN210867554U (en) | 2019-12-24 | 2019-12-24 | Power PMOS tube driving circuit and driving circuit for three-phase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210867554U true CN210867554U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922355377.XU Active CN210867554U (en) | 2019-12-24 | 2019-12-24 | Power PMOS tube driving circuit and driving circuit for three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210867554U (en) |
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2019
- 2019-12-24 CN CN201922355377.XU patent/CN210867554U/en active Active
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