CN211352085U - Brushless DC motor driver - Google Patents
Brushless DC motor driver Download PDFInfo
- Publication number
- CN211352085U CN211352085U CN201922152492.7U CN201922152492U CN211352085U CN 211352085 U CN211352085 U CN 211352085U CN 201922152492 U CN201922152492 U CN 201922152492U CN 211352085 U CN211352085 U CN 211352085U
- Authority
- CN
- China
- Prior art keywords
- pin
- mosfet
- resistor
- motor
- brushless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model discloses a brushless DC motor driver, which comprises a control unit MCU, a brushless DC motor driving circuit and a three-phase brushless DC motor; the model of a driving chip U2 adopted by the brushless direct current motor driving circuit is Si 9979; hall signals provided by Hall sensors in the three-phase brushless direct current motor generate commutation logic through a logic circuit in a brushless direct current motor driving chip U2, and control signals input by the commutation logic and the brushless direct current motor driving chip U2 comprehensively generate 6-channel high-end and low-end gate driving signals through the interior of a brushless direct current motor driving chip U2 to control the three-phase brushless direct current motor to act; the I/O port of the control unit MCU outputs high and low level signals to the brushless DC motor driving chip U2 for controlling enabling, forward rotation, reverse rotation, start and stop and speed regulation of the three-phase brushless DC motor. The motor driver is small in size, simple in circuit structure and comprehensive in function.
Description
Technical Field
The utility model relates to a braking system field, concretely relates to brushless DC motor driver application.
Background
At present, the airplane is developing towards full electricity, and the braking system is developing towards an electric braking system as an important subsystem of the airplane. The electric braking system replaces the hydraulic braking system with the controller, the motor driver and the electromechanical actuating mechanism, so that the weight and the volume of the braking system can be obviously reduced, the torque control and the anti-skid performance of the braking system are improved, the braking distance is shortened, and the service lives of tires and braking devices are prolonged. Brushless DC motor has been widely used in electric braking system because of its good linear speed-adjusting performance, simple control performance and high-quality, high-efficient and smooth running characteristic, and the motor driver is used as the intermediate link of braking system, and its performance is directly related to the success or failure of braking control. The traditional three-phase brushless direct current motor driving circuit is large in size, needs a complex circuit to drive the MOSFET and is not beneficial to the use of an electric braking system of an airplane.
SUMMERY OF THE UTILITY MODEL
Purpose of the utility model
In order to solve the problem, the utility model provides a brushless DC motor driver which is small in size, simple in circuit structure and comprehensive in function.
Technical solution of utility model
A brushless direct current motor driver comprises a control unit MCU, a brushless direct current motor driving circuit and a three-phase brushless direct current motor; the model of a driving chip U2 adopted by the brushless direct current motor driving circuit is Si 9979; hall signals provided by Hall sensors in the three-phase brushless direct current motor generate commutation logic through a logic circuit in a brushless direct current motor driving chip U2, and control signals input by the commutation logic and the brushless direct current motor driving chip U2 comprehensively generate 6-channel high-end and low-end gate driving signals through the interior of a brushless direct current motor driving chip U2 to control the three-phase brushless direct current motor to act; the I/O port of the control unit MCU outputs high and low level signals to the brushless DC motor driving chip U2 for controlling enabling, forward rotation, reverse rotation, start and stop and speed regulation of the three-phase brushless DC motor.
Preferably, the I/O port of the control unit MCU outputs high and low level signals to the EN port of the brushless dc motor driving chip U2 for controlling the enabling of the three-phase brushless dc motor; the I/O port of the MCU outputs high and low level signals to an FR port of a drive chip U2 of the brushless direct current motor for controlling the motor to rotate forwards and backwards, and the I/O port of the control unit MCU outputs PWM signals with adjustable duty ratio to a control end of the brushless direct current motor for controlling the speed regulation of the three-phase brushless direct current motor; and the I/O port of the control unit MCU outputs high and low level signals to the BRK port of the brushless DC motor driving chip U2 for controlling the start and stop of the three-phase brushless DC motor.
Preferably, the three-phase full-bridge driving circuit comprises 6 MOSFET transistors Q1, Q2, Q3, Q4, Q5 and Q6, and a resistor is connected in parallel between the gate and the source of each MOSFET transistor to provide a current drain loop. Preferably, the device also comprises a dual-redundancy current protection circuit, the dual-redundancy current protection circuit collects current flowing through a three-phase brushless direct current motor winding through a sampling resistor Rs, and provides the sampled voltage signal to a control unit MCU after filtering and amplifying, the control unit MCU obtains the working current of the three-phase brushless direct current motor by performing AD collection on the signal, and when the collected current signal is greater than a set current threshold value, the control unit MCU can control the MOSFET tubes Q1, Q2, Q3, Q4, Q5 and Q6 to be turned off; the voltage at two ends of a sampling resistor Rs in the dual-redundancy current protection circuit is compared with 100mV set by a comparison circuit in the brushless DC motor driving chip U2 to judge whether the current exceeds an allowable range, and when the voltage at two ends of the sampling resistor Rs in the dual-redundancy current protection circuit is greater than 100mV, the current limiting circuit in the brushless DC motor driving chip U2 can close the conducted MOSFET for a period of time.
Preferably, the motor speed control system further comprises a motor speed interface circuit, a motor speed signal is provided through a TACH port of the brushless direct current motor driving chip U2, and the control unit MCU can acquire the real-time running speed of the motor by capturing the frequency of the TACH port signal.
Preferably, the FAULT indication device further comprises a FAULT indication interface circuit, and the FAULT indication function is provided through a FAULT port of the brushless direct current motor driving chip U2.
Preferably, the fault which can be indicated by the fault indication interface circuit comprises undervoltage, overcurrent, invalid hall sensor signals and incapability of the brushless direct current motor driving chip U2.
Preferably, the model of the main control chip of the control unit MCU is C8051F 330.
Preferably, the driving circuit is composed of a driving chip U2, a capacitor C10, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOSFET Q1, a MOSFET Q4, a capacitor C11, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOSFET Q2, a MOSFET Q5, a capacitor C12, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a MOSFET Q3, a MOSFET Q6, a sampling resistor Rs, a resistor R17, and a capacitor C18;
the driving chip U2 comprises a pin EN, a pin FR, a pin PWM, a pin BRK, a pin CAPa, a pin Sa, a pin GTa, a pin GBa, a pin CAPb, a pin Sb, a pin GTb, a pin GBb, a pin CAPc, a pin Sc, a pin GTc, a pin GBc, a pin IS +, a pin IS-, a pin INa, a pin INb and a pin Inc;
a pin EN, a pin FR, a pin PWM and a pin BRK of the driving chip U2 are connected with an I/O port of the control unit MCU;
a pin CAPa of a driving chip U2 is connected with a pin Sa through a capacitor C10, the pin Sa is connected with a source electrode of a MOSFET Q1, the pin GTa is connected with a grid electrode of a MOSFET Q1 through a resistor R1, the pin GBa is connected with a grid electrode of a MOSFET Q4 through a resistor R3, a drain electrode of the MOSFET Q1 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q1 is connected with a drain electrode of the MOSFET Q4;
a pin CAPb of a driving chip U2 is connected with a pin Sb through a capacitor C11, the pin Sb is connected with a source electrode of a MOSFET Q2, the pin GTb is connected with a grid electrode of a MOSFET Q2 through a resistor R5, the pin GBb is connected with a grid electrode of a MOSFET Q5 through a resistor R7, a drain electrode of the MOSFET Q2 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q2 is connected with a drain electrode of the MOSFET Q5;
the pin CAPc is connected with a pin Sc through a capacitor C12, the pin Sc is connected with a source electrode of a MOSFET tube Q3, the pin GTc is connected with a grid electrode of a MOSFET tube Q3 through a resistor R9, the pin GBc is connected with a grid electrode of a MOSFET tube Q6 through a resistor R11, a drain electrode of the MOSFET tube Q3 is connected with a power supply voltage V +, and a source electrode of the MOSFET tube Q3 is connected with a drain electrode of a MOSFET tube Q6; the resistor R2 is connected between the grid and the source of the MOSFET tube Q1 in parallel, the resistor R4 is connected between the grid and the source of the MOSFET tube Q4 in parallel, the resistor R6 is connected between the grid and the source of the MOSFET tube Q2 in parallel, the resistor R8 is connected between the grid and the source of the MOSFET tube Q5 in parallel, the resistor R10 is connected between the grid and the source of the MOSFET tube Q3 in parallel, and the resistor R12 is connected between the grid and the source of the MOSFET tube Q6 in parallel;
the pins Sa, Sb and Sc are connected with the phase A, the phase B and the phase C of the three-phase brushless direct current motor, and the pins INa, INb and Inc are respectively connected with output signals Hall a, Hall B and Hall C of a built-in Hall sensor of the three-phase brushless direct current motor;
one end of the sampling resistor Rs is connected with the connecting ends of the source electrode of the MOSFET Q4, the source electrode of the MOSFET Q5 and the source electrode of the MOSFET Q6, and the other end of the sampling resistor Rs is connected with a power ground; one end of the resistor R17 IS connected to the pin IS +, and the other end IS connected to the connection end of the source electrode of the MOSFET Q4 and the sampling resistor Rs.
The utility model has the advantages that: the brushless direct current motor driver overcomes the problems of large volume, complex structure and insufficient functions of a driving circuit to a certain extent through the design of the driving circuit. And simultaneously, the utility model discloses still ensure through the design of two redundancy current protection circuits and turn-off drive circuit when motor current is too big, catch circuit real-time supervision motor running speed through speed, can make motor work safe and reliable more through control strategy, can effectively improve motor life.
Drawings
Fig. 1 is a schematic structural diagram of a brushless dc motor driver according to the present invention.
Fig. 2 is a circuit schematic of the control unit.
Fig. 3 is a schematic circuit diagram of a brushless dc motor driving circuit according to the present invention.
Fig. 4 is a circuit schematic of the current protection circuit.
FIG. 5 is a circuit schematic of a motor speed interface circuit
FIG. 6 is a circuit schematic of a fault indication interface circuit
In the figure: the system comprises a control unit 1, a brushless direct current motor driving circuit 2, a dual-redundancy current protection circuit 3, a three-phase direct current brushless motor 4, a motor speed interface circuit 5 and a fault indication interface circuit 6.
Detailed Description
The utility model discloses a realize through following technical scheme.
A brushless direct current motor driver comprises a control unit MCU, a brushless direct current motor drive circuit, a dual-redundancy current protection circuit, a three-phase brushless direct current motor, a motor speed interface circuit and a fault indication circuit. The brushless direct current motor can be flexibly controlled to rotate forwards and reversely, start and stop, adjust speed, provide current limiting, short circuit protection and under-voltage self-locking functions, and provide a motor rotating speed signal and a current signal flowing through a motor winding. The control unit main control chip selects C8051F330 with small volume.
The model of a driving chip U2 adopted by the brushless direct current motor driving circuit is Si 9979. The brushless dc motor driver chip U2 provides functions such as control signal input, commutation logic generation, gate drive output and protection circuitry for brushless motor control. Hall signals provided by the Hall sensor of the brushless motor generate commutation logic through a logic circuit in the brushless DC motor driving chip U2, and control signals input by the commutation logic and the brushless DC motor driving chip U2 comprehensively generate 6-path high-end and low-end gate driving signals through the interior of the brushless DC motor driving chip U2 to control the action of the three-phase brushless DC motor.
The driving circuit adopts a classical three-phase full-bridge driving circuit and comprises 6 MOSFET (metal oxide semiconductor field effect transistor) transistors Q1, Q2, Q3, Q4, Q5 and Q6, wherein a resistor is connected in parallel between the gate electrode and the source electrode of each MOSFET transistor to provide a current leakage loop so as to provide the working reliability of the circuit. The models of the MOSFET tubes Q1-Q6 are IRF 540N.
The I/O port of the control unit MCU outputs high and low level signals to an EN port of a U2 chip to control the motor to enable, the I/O port of the control unit MCU outputs high and low level signals to an FR port of a U2 chip to control the motor to rotate forwards and reversely, the I/O port of the control unit MCU outputs high and low level signals to a BRK port of a brushless direct current motor driving chip U2 to start and stop, and the I/O port of the control unit MCU outputs PWM signals with adjustable duty ratio to a PWM control end of the brushless direct current motor driving chip U2 to control the speed regulation of the motor.
The method adopts a dual-redundancy current protection circuit, one: the current flowing through a motor winding is collected by a method of serially sampling a small resistor Rs, a voltage signal obtained by sampling is amplified and filtered and then is supplied to an MCU (micro control unit), the MCU can obtain the working current of the motor by carrying out AD (analog-to-digital) collection on the signal, and when the collected current signal is greater than a set current threshold value, the BRK port of a brushless direct current motor driving chip U2 can be controlled to output a low level to turn off an MOSFET (metal-oxide-semiconductor field effect transistor). And secondly, a current limiting circuit is arranged in the Si9979 chip, the voltage at two ends of the sampling resistor Rs is compared with 100mV set by a comparison circuit in the brushless direct current motor driving chip U2 to judge whether the current exceeds an allowable range, and when the current is overlarge, the current limiting circuit can close the on MOSFET for a period of time.
The motor speed TACH port of the brushless direct current motor driving chip U2 can provide a motor rotating speed signal, the MCU captures the signal through the motor speed interface circuit, and the real-time running speed of the motor is obtained through internal calculation.
The FAULT indication function is provided through a FAULT port of the brushless direct current motor driving chip U2, and an error indication signal is output when any FAULT mode such as overcurrent, undervoltage, invalid Hall sensor signals, incapability of the driving chip and the like occurs. The MCU can identify whether the motor has a fault or not by acquiring the level state of the port through the fault indication interface circuit.
The driving circuit is composed of a driving chip U2, a capacitor C10, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOSFET Q1, a MOSFET Q4, a capacitor C11, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOSFET Q2, a MOSFET Q5, a capacitor C12, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a MOSFET Q3, a MOSFET Q6, a sampling resistor Rs, a resistor R17 and a capacitor C18;
the driving chip U2 comprises a pin EN, a pin FR, a pin PWM, a pin BRK, a pin CAPa, a pin Sa, a pin GTa, a pin GBa, a pin CAPb, a pin Sb, a pin GTb, a pin GBb, a pin CAPc, a pin Sc, a pin GTc, a pin GBc, a pin IS +, a pin IS-, a pin INa, a pin INb and a pin Inc;
a pin EN, a pin FR, a pin PWM and a pin BRK of the driving chip U2 are connected with an I/O port of the control unit MCU;
a pin CAPa of a driving chip U2 is connected with a pin Sa through a capacitor C10, the pin Sa is connected with a source electrode of a MOSFET Q1, the pin GTa is connected with a grid electrode of a MOSFET Q1 through a resistor R1, the pin GBa is connected with a grid electrode of a MOSFET Q4 through a resistor R3, a drain electrode of the MOSFET Q1 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q1 is connected with a drain electrode of the MOSFET Q4;
a pin CAPb of a driving chip U2 is connected with a pin Sb through a capacitor C11, the pin Sb is connected with a source electrode of a MOSFET Q2, the pin GTb is connected with a grid electrode of a MOSFET Q2 through a resistor R5, the pin GBb is connected with a grid electrode of a MOSFET Q5 through a resistor R7, a drain electrode of the MOSFET Q2 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q2 is connected with a drain electrode of the MOSFET Q5;
the pin CAPc is connected with a pin Sc through a capacitor C12, the pin Sc is connected with a source electrode of a MOSFET tube Q3, the pin GTc is connected with a grid electrode of a MOSFET tube Q3 through a resistor R9, the pin GBc is connected with a grid electrode of a MOSFET tube Q6 through a resistor R11, a drain electrode of the MOSFET tube Q3 is connected with a power supply voltage V +, and a source electrode of the MOSFET tube Q3 is connected with a drain electrode of a MOSFET tube Q6;
the resistor R2 is connected between the grid and the source of the MOSFET tube Q1 in parallel, the resistor R4 is connected between the grid and the source of the MOSFET tube Q4 in parallel, the resistor R6 is connected between the grid and the source of the MOSFET tube Q2 in parallel, the resistor R8 is connected between the grid and the source of the MOSFET tube Q5 in parallel, the resistor R10 is connected between the grid and the source of the MOSFET tube Q3 in parallel, and the resistor R12 is connected between the grid and the source of the MOSFET tube Q6 in parallel;
the pins Sa, Sb and Sc are connected with the phase A, the phase B and the phase C of the three-phase brushless direct current motor, and the pins INa, INb and Inc are respectively connected with output signals Hall a, Hall B and Hall C of a built-in Hall sensor of the three-phase brushless direct current motor;
one end of the sampling resistor Rs is connected with the connecting ends of the source electrode of the MOSFET Q4, the source electrode of the MOSFET Q5 and the source electrode of the MOSFET Q6, and the other end of the sampling resistor Rs is connected with a power ground; one end of the resistor R17 IS connected to the pin IS +, and the other end IS connected to the connection end of the source electrode of the MOSFET Q4 and the sampling resistor Rs.
The above embodiments are only for illustrating the technical conception and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, so as not to limit the protection scope of the present invention, and all the equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (9)
1. A brushless direct current motor driver is characterized by comprising a control unit MCU, a brushless direct current motor driving circuit and a three-phase brushless direct current motor; the model of a driving chip U2 adopted by the brushless direct current motor driving circuit is Si 9979; hall signals provided by Hall sensors in the three-phase brushless direct current motor generate commutation logic through a logic circuit in a brushless direct current motor driving chip U2, and control signals input by the commutation logic and the brushless direct current motor driving chip U2 comprehensively generate 6-channel high-end and low-end gate driving signals through the interior of a brushless direct current motor driving chip U2 to control the three-phase brushless direct current motor to act; the I/O port of the control unit MCU outputs high and low level signals to the brushless DC motor driving chip U2 for controlling enabling, forward rotation, reverse rotation, start and stop and speed regulation of the three-phase brushless DC motor.
2. The brushless dc motor driver as claimed in claim 1, wherein the I/O port of the control unit MCU outputs high and low level signals to the EN port of the brushless dc motor driving chip U2 for controlling the enabling of the three-phase brushless dc motor; the I/O port of the MCU outputs high and low level signals to an FR port of a drive chip U2 of the brushless direct current motor for controlling the motor to rotate forwards and backwards, and the I/O port of the control unit MCU outputs PWM signals with adjustable duty ratio to a control end of the brushless direct current motor for controlling the speed regulation of the three-phase brushless direct current motor; and the I/O port of the control unit MCU outputs high and low level signals to the BRK port of the brushless DC motor driving chip U2 for controlling the start and stop of the three-phase brushless DC motor.
3. A brushless dc motor driver as claimed in claim 1, wherein the three-phase full bridge driving circuit comprises 6 MOSFET transistors Q1, Q2, Q3, Q4, Q5, Q6, and a resistor is connected in parallel between the gate and source of each MOSFET transistor to provide a current drain loop.
4. The brushless dc motor driver of claim 3, further comprising a dual-redundancy current protection circuit, wherein the dual-redundancy current protection circuit collects current flowing through the three-phase brushless dc motor winding through a sampling resistor Rs, and provides a voltage signal obtained by sampling to the control unit MCU after filtering and amplifying, the control unit MCU obtains operating current of the three-phase brushless dc motor by AD-collecting the signal, and when the collected current signal is greater than a set current threshold, the control unit MCU controls the MOSFET transistors Q1, Q2, Q3, Q4, Q5, and Q6 to turn off; the voltage at two ends of a sampling resistor Rs in the dual-redundancy current protection circuit is compared with 100mV set by a comparison circuit in the brushless direct current motor driving chip U2 to judge whether the current exceeds an allowable range, and when the voltage at two ends of the sampling resistor Rs in the dual-redundancy current protection circuit is larger than 100mV, the current limiting circuit in the brushless direct current motor driving chip U2 can close the conducted MOSFET for a period of time.
5. A brushless dc motor driver according to claim 1, wherein: the motor speed control circuit also comprises a motor speed interface circuit, a motor rotating speed signal is provided through a TACH port of the brushless direct current motor driving chip U2, and the control unit MCU can acquire the real-time running speed of the motor by capturing the frequency of the TACH port signal.
6. A brushless dc motor driver according to claim 1, wherein: and the FAULT indication interface circuit is also included and provides a FAULT indication function through a FAULT port of the brushless direct current motor driving chip U2.
7. A brushless dc motor driver according to claim 1, wherein: faults which can be indicated by the fault indication interface circuit comprise undervoltage, overcurrent, invalid Hall sensor signals and incapability of the brushless direct current motor driving chip U2.
8. A brushless dc motor driver according to claim 1, wherein: the model of the main control chip of the control unit MCU is C8051F 330.
9. A brushless dc motor driver according to claim 8, wherein: the driving circuit is composed of a driving chip U2, a capacitor C10, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOSFET Q1, a MOSFET Q4, a capacitor C11, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOSFET Q2, a MOSFET Q5, a capacitor C12, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a MOSFET Q3, a MOSFET Q6, a sampling resistor Rs, a resistor R17 and a capacitor C18;
the driving chip U2 comprises a pin EN, a pin FR, a pin PWM, a pin BRK, a pin CAPa, a pin Sa, a pin GTa, a pin GBa, a pin CAPb, a pin Sb, a pin GTb, a pin GBb, a pin CAPc, a pin Sc, a pin GTc, a pin GBc, a pin IS +, a pin IS-, a pin INa, a pin INb and a pin Inc;
a pin EN, a pin FR, a pin PWM and a pin BRK of the driving chip U2 are connected with an I/O port of the control unit MCU;
a pin CAPa of a driving chip U2 is connected with a pin Sa through a capacitor C10, the pin Sa is connected with a source electrode of a MOSFET Q1, the pin GTa is connected with a grid electrode of a MOSFET Q1 through a resistor R1, the pin GBa is connected with a grid electrode of a MOSFET Q4 through a resistor R3, a drain electrode of the MOSFET Q1 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q1 is connected with a drain electrode of the MOSFET Q4;
a pin CAPb of a driving chip U2 is connected with a pin Sb through a capacitor C11, the pin Sb is connected with a source electrode of a MOSFET Q2, the pin GTb is connected with a grid electrode of a MOSFET Q2 through a resistor R5, the pin GBb is connected with a grid electrode of a MOSFET Q5 through a resistor R7, a drain electrode of the MOSFET Q2 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q2 is connected with a drain electrode of the MOSFET Q5;
a pin CAPc of a driving chip U2 is connected with a pin Sc through a capacitor C12, the pin Sc is connected with a source electrode of a MOSFET Q3, the pin GTc is connected with a grid electrode of the MOSFET Q3 through a resistor R9, the pin GBc is connected with a grid electrode of the MOSFET Q6 through a resistor R11, a drain electrode of the MOSFET Q3 is connected with a power supply voltage V +, and a source electrode of the MOSFET Q3 is connected with a drain electrode of the MOSFET Q6;
the resistor R2 is connected between the grid and the source of the MOSFET tube Q1 in parallel, the resistor R4 is connected between the grid and the source of the MOSFET tube Q4 in parallel, the resistor R6 is connected between the grid and the source of the MOSFET tube Q2 in parallel, the resistor R8 is connected between the grid and the source of the MOSFET tube Q5 in parallel, the resistor R10 is connected between the grid and the source of the MOSFET tube Q3 in parallel, and the resistor R12 is connected between the grid and the source of the MOSFET tube Q6 in parallel;
pins Sa, Sb and Sc of a driving chip U2 are connected with the phase A, the phase B and the phase C of the three-phase brushless direct current motor, and pins INa, INb and Inc are respectively connected with output signals Hall a, Hall B and Hall C of a built-in Hall sensor of the three-phase brushless direct current motor;
one end of the sampling resistor Rs is connected with the connecting ends of the source electrode of the MOSFET Q4, the source electrode of the MOSFET Q5 and the source electrode of the MOSFET Q6, and the other end of the sampling resistor Rs is connected with a power ground; one end of the resistor R17 IS connected to the pin IS +, and the other end IS connected to the connection end of the source electrode of the MOSFET Q4 and the sampling resistor Rs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922152492.7U CN211352085U (en) | 2019-12-04 | 2019-12-04 | Brushless DC motor driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922152492.7U CN211352085U (en) | 2019-12-04 | 2019-12-04 | Brushless DC motor driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211352085U true CN211352085U (en) | 2020-08-25 |
Family
ID=72134901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922152492.7U Active CN211352085U (en) | 2019-12-04 | 2019-12-04 | Brushless DC motor driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211352085U (en) |
-
2019
- 2019-12-04 CN CN201922152492.7U patent/CN211352085U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204210320U (en) | Based on the DC/DC control system of electronlmobil regenerative brake | |
| WO2024016536A1 (en) | Braking system and method for brushless direct current motor | |
| CN211352085U (en) | Brushless DC motor driver | |
| CN208836047U (en) | Permanent magnetic brushless direct-current motor driver leads directly to trouble hunting system | |
| CN113141144B (en) | Motor drive circuit | |
| CN102684565B (en) | A kind of DC motor driver | |
| CN107994817A (en) | Counter electromotive force of motor sampling system and its method | |
| CN202406068U (en) | Diver for direct current motor | |
| CN108471231B (en) | Absorption device for absorbing back electromotive force | |
| CN212305190U (en) | Compressor driver of parking air conditioner | |
| CN212305282U (en) | IGBT over-current protection circuit and device | |
| CN211924440U (en) | Dual-control system applied to air conditioner compressor | |
| CN208257692U (en) | A kind of direct current motor drive circuit braked | |
| CN107666237A (en) | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit | |
| CN209105067U (en) | A kind of H-bridge drive circuit | |
| CN208369548U (en) | A kind of IGBT Drive Protecting Circuit | |
| CN109347398B (en) | Current commutation topological structure of two-phase switch reluctance motor based on IPM | |
| CN202424619U (en) | Alternating-current motor and controller device | |
| CN213937780U (en) | Motor buffer controller | |
| CN205890866U (en) | Electric vacuum pump controlling means for electric automobile | |
| CN203858469U (en) | Automobile air conditioner controller using integrated motor driving circuit based on discrete components | |
| CN220544866U (en) | Drain system and vehicle | |
| CN221509805U (en) | Heating tube driving circuit | |
| CN214544161U (en) | Brush direct current motor positive and negative rotation frequency conversion device | |
| CN215830696U (en) | 540V pure electric bus air conditioner compressor driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |