CN208835992U - A kind of brushless motor inverter field-effect tube driving circuit - Google Patents
A kind of brushless motor inverter field-effect tube driving circuit Download PDFInfo
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- CN208835992U CN208835992U CN201821664501.XU CN201821664501U CN208835992U CN 208835992 U CN208835992 U CN 208835992U CN 201821664501 U CN201821664501 U CN 201821664501U CN 208835992 U CN208835992 U CN 208835992U
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Abstract
The utility model is a kind of brushless motor inverter field-effect tube driving circuit, the circuit includes driving chip N1, resistance R1, R2 and R3, capacitor C1, diode D1, diode D2 and field-effect tube V1, the pulse width signal input terminal in of driving chip N1 is connect with pulse-width signal input pwm signal, the power input of driving chip N1 is connect with+15V power supply, the output end out of driving chip N1 is connected respectively at one end of resistance R1 with the cathode of diode D1, the other end of the resistance R1 grid G with field-effect tube V1 respectively, the anode of diode D1, one end of resistance R2 connects；The resistance R2 other end is connect with one end of the source S of field-effect tube V1, the anode of capacitor C1, the cathode of diode D2, resistance R3 respectively；The anode of diode D2 and the cathode of capacitor C1 are connect with+15V power ground；The other end of resistance R3 is connect with+15V power supply.What the circuit accelerated field effect transistor switch pipe turns on and off process, shortens and turns on and off the time, to reduce the loss of field effect transistor switch pipe.
Description
Technical field
The utility model is a kind of brushless motor inverter field-effect tube driving circuit, belongs to motor driver design
Technical field.
Background technique
Brushless motor is made of controller, power inverter and motor body etc. substantially, and power inverter is by direct current
Variation is that alternating current inputs to motor, to realize the rotation of motor, the main component of power inverter be exactly field-effect tube and
Its driving circuit.Common brushless motor inverter field-effect tube driving circuit is referring to Fig. 1 at present, it by driving chip N1,
Resistance R1, R2, field-effect tube V1 composition；The pulse-width signal input terminal of driving chip N1 and the pulsewidth modulation of regulating circuit
Signal output end PWM connection, the power input of driving chip N1 are connect with+15V power supply, the output end string of driving chip N1
It is connect after connection resistance R1 with the grid G of field-effect tube V1, resistance R2 connects between the grid G and source S of scene effect pipe V1, field effect
Should pipe V1 source S ground connection；Its working principle is that: pwm signal after driving chip N1 carries out electrical isolation and power amplification,
The time of field-effect tube V1 turn-on and turn-off process is determined by current-limiting resistance R1 driving FET V1, resistance R1；Its disadvantage
Be: because the resistance of resistance R1 limits, field-effect tube V1 turn off process is slow, and the turn-off time is long, causes the loss of field-effect tube V1 big.
Summary of the invention
The purpose of this utility model is to propose that a kind of motor inverter that can accelerate turn off process, shorten the turn-off time is driven
Dynamic circuit, to reduce the loss of field-effect tube V1.
The technical scheme is that
This kind of brushless motor inverter field-effect tube driving circuit, it is characterised in that: the circuit include driving chip N1,
Resistance R1, R2 and R3, capacitor C1, diode D1, diode D2 and field-effect tube V1, the pulse width signal input terminal of driving chip N1
In is connect with pulse-width signal input pwm signal, and the power input of driving chip N1 is connect with+15V power supply, driving chip
The output end out of N1 is connected respectively at one end of resistance R1 with the cathode of diode D1, and the other end of resistance R1 is imitated with field respectively
Should the grid G of pipe V1, the anode of diode D1, resistance R2 one end connection；The resistance R2 other end is respectively with field-effect tube V1's
One end connection of source S, the anode of capacitor C1, the cathode of diode D2, resistance R3；The anode of diode D2 and capacitor C1's
Cathode is connect with+15V power ground；The other end of resistance R3 is connect with+15V power supply.
Further, the diode D1 is fast recovery diode, and diode D2 is zener diode, and capacitor C1 is solid
State tantalum capacitor.
Further, the source S Yu+15V power ground of the field-effect tube V1 be not altogether.
The utility model has the advantages that: when turning off field effect transistor switch pipe V1, driving chip N1 output pin is by high level
Become low level ground connection, fast recovery diode D1 is connected immediately, makes the grid voltage U of field-effect tube V1GSIt reduces rapidly；Meanwhile
Since the effect of zener diode and storage capacitor C1 makes UGSCertain back-pressure is formed, so that field-effect tube V1 be made further reliably to close
It is disconnected.The circuit accelerates the turn off process of field effect transistor switch pipe V1, shortens the turn-off time, to reduce field-effect tube V1's
Switching loss reduces field-effect tube V1 fever.
Detailed description of the invention
Fig. 1 is current brushless motor inverter field-effect tube driver circuit schematic diagram.
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
Technical solution of the present invention is described in further detail below.
It is shown in Figure 2, the brushless motor inverter field-effect tube driving circuit by driving chip N1, resistance R1,
R2 and R3, capacitor C1, diode D1, diode D2 and field-effect tube V1 composition；The pulse width signal input terminal in of driving chip N1
It is connect with pulse-width signal input pwm signal, the power input of driving chip N1 is connect with+15V power supply, driving chip
The output end out of N1 is connected respectively at one end of resistance R1 with the cathode of diode D1, and the other end of resistance R1 is imitated with field respectively
Should the grid G of pipe V1, the anode of diode D1, resistance R2 one end connection；The resistance R2 other end is respectively with field-effect tube V1's
One end connection of source S, the anode of capacitor C1, the cathode of diode D2, resistance R3；The anode of diode D2 and bearing for capacitor C1
Extremely it is connect with+15V power ground；The other end of resistance R3 is connect with+15V power supply.
The diode D1 is fast recovery diode, and diode D2 is zener diode, and capacitor C1 is solid-state tantalum electricity
Hold, the source S of field-effect tube V1 and+15V power ground are not altogether.
The working principle of the utility model circuit is: pwm signal after driving chip N1, by R1, R2, R3, D1, D2,
The driving circuit of C1 composition, driving FET V1；When pwm signal is high level, driving chip N1 output+15V driving electricity
Pressure, by resistance R1, the U of field-effect tube V1GSFor high level, so that field-effect tube V1 be made to be connected；When pwm signal is low level
When, driving chip N1 output is low level, and the U that can make field-effect tube V1 is connected in fast recovery diode D1GSIt reduces rapidly, meanwhile,
Since the effect of zener diode and storage capacitor C1 makes UGSCertain back-pressure is formed, so that field-effect tube V1 be made to rapidly switch off.
When implementation, R1 resistance value is 1 Ω, and R2 resistance value is 5.1K Ω, and R3 resistance value is 2K Ω, D1 model 2CN3F, D2 model
For BWC103, V1 model IXKK85N60C, field-effect tube V1 average current is 20A.Survey the field-effect tube pipe turn-off time by
100ns is reduced to 55ns.
When implementation: R1 resistance value is 100 Ω, and R2 resistance value is 2K Ω, and R3 resistance value is 2K Ω, D1 model 2CN3F, D2 model
For BWC102, V1 model IRF460, field-effect tube V1 average current is 5A.The field-effect tube pipe turn-off time is reduced to by 51ns
30ns。
Claims (3)
1. a kind of brushless motor inverter field-effect tube driving circuit, it is characterised in that: the circuit includes driving chip N1, electricity
Hinder the pulse width signal input terminal in of R1, R2 and R3, capacitor C1, diode D1, diode D2 and field-effect tube V1, driving chip N1
It is connect with pulse-width signal input pwm signal, the power input of driving chip N1 is connect with+15V power supply, driving chip N1
Output end out connected respectively at one end of resistance R1 with the cathode of diode D1, the other end of resistance R1 respectively with field-effect
One end connection of the grid G of pipe V1, the anode of diode D1, resistance R2；The resistance R2 other end source with field-effect tube V1 respectively
One end connection of pole S, the anode of capacitor C1, the cathode of diode D2, resistance R3；The anode of diode D2 and the cathode of capacitor C1
It is connect with+15V power ground；The other end of resistance R3 is connect with+15V power supply.
2. inverter field-effect tube driving circuit according to claim 1, it is characterised in that: the diode D1 is fast
Quick-recovery diode, diode D2 are zener diode, and capacitor C1 is solid-state tantalum capacitor.
3. inverter field-effect tube driving circuit according to claim 1, it is characterised in that: the field-effect tube V1's
Source S and+15V power ground are not altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821664501.XU CN208835992U (en) | 2018-10-12 | 2018-10-12 | A kind of brushless motor inverter field-effect tube driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821664501.XU CN208835992U (en) | 2018-10-12 | 2018-10-12 | A kind of brushless motor inverter field-effect tube driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208835992U true CN208835992U (en) | 2019-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821664501.XU Active CN208835992U (en) | 2018-10-12 | 2018-10-12 | A kind of brushless motor inverter field-effect tube driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208835992U (en) |
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2018
- 2018-10-12 CN CN201821664501.XU patent/CN208835992U/en active Active
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