CN107404259A - A kind of brushless DC motor control circuit - Google Patents
A kind of brushless DC motor control circuit Download PDFInfo
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- CN107404259A CN107404259A CN201710723854.6A CN201710723854A CN107404259A CN 107404259 A CN107404259 A CN 107404259A CN 201710723854 A CN201710723854 A CN 201710723854A CN 107404259 A CN107404259 A CN 107404259A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to a kind of brushless DC motor control circuit, including：Input filter, three-phase chopper circuit, high-frequency filter circuit, rectified three-phase circuit, buffering and leadage circuit, three phase inverter bridge, dsp controller, signal acquisition circuit and drive circuit；The present invention is using dsp controller as main control chip; without complicated software algorithm; brshless DC motor voltage is modulated using three-phase chopper circuit; without excessive inductance, motor torque ripple is reduced, is depressured in start-up course using AC chopping and three phase inverter bridge two-stage circuit; reduce electric motor starting electric current; electric motor starting reliability is improved, abnormal, exportable protection signal protection control single channel and motor occurs.
Description
Technical field
The present invention relates to motor control technology field, more particularly to a kind of brushless DC motor control circuit.
Background technology
Brshless DC motor has the advantages that simple in construction, small volume, power density be high, efficiency high, national defence, space flight,
The every field of the national economy such as aviation, automobile, household electrical appliances is used widely.Appearance and electronics member device with permanent-magnet material
The fast development of part, permanent-magnet brushless DC electric machine are more widely applied, small size, highly reliable brushless DC motor control circuit
One of key technology as brshless DC motor development.
Brushless DC motor control circuit mainly distinguishes two class modes at present, and the first kind is uncontrollable rectifier circuit and three contraries
Become the combined mode of bridge circuit, motor control is carried out by the way of directly modulation three phase inverter bridge bridge arm, this mode
Advantage is that controling circuit structure is simple, and easy to control, control algolithm is simple, and shortcoming is due to direct modulation three phase inverter bridge bridge arm
The motor torque ripple increase brought, power tube heating is serious, for all smaller high-speed electric expreess locomotive of armature resistance and inductance, opens
Dynamic reliability reduces；Second class is using uncontrollable rectifier circuit or controlled rectification circuit, dc chopper circuit and three contraries
Becoming the combined mode of bridge circuit, advantage is that starting current is small, reduces motor torque ripple, and three phase inverter bridge need not be modulated,
Switching loss is reduced, shortcoming is to cause bus current to be in on-off state using dc chopper, reduces motor power factor,
And for heavy-duty motor, DC chopper circuit cost is high, volume is larger.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of brushless DC motor control circuit, brushless straight to solve
Flow circuit for controlling motor torque pulsation height, the technical problem that volume is big, reliability is low.
The purpose of the present invention is mainly achieved through the following technical solutions：
In based on one embodiment of the present of invention, there is provided a kind of brushless DC motor control circuit, including：Three-phase is cut
Wave circuit, high-frequency filter circuit, rectified three-phase circuit, buffering and leadage circuit, three phase inverter bridge, dsp controller, signal acquisition
Circuit and drive circuit；Wherein Three-phase alternating current signal is connected to the input of three-phase chopper circuit after input filter filters
End, three-phase chopper circuit output voltage signal are connected to the input of rectified three-phase circuit after high-frequency filter circuit filters, and three
Commutating phase circuit output DC voltage Ud is connected to buffering and the input of leadage circuit, buffering and leadage circuit output direct current
Pressure Ud1 is connected to the input of three phase inverter bridge, three phase inverter bridge output AC voltage to brshless DC motor, signal acquisition electricity
Road gathers the voltage and current signal of three phase inverter bridge, and Brushless DC Motor Position signal inputs the capture interface of dsp controller,
The output voltage and current signal of signal acquisition circuit are connected to the A D interface of dsp controller, the output of dsp controller PWM interfaces
Pwm signal and protection signal are connected to the input of drive circuit, and drive circuit output drive signal S1-S6 is connected to three-phase and cut
The control terminal of wave circuit, drive circuit output drive signal S7 are connected to buffering and the control terminal of leadage circuit, and drive circuit is defeated
Go out the control terminal that drive signal S8-S13 is connected to three phase inverter bridge.
In another embodiment based on circuit of the present invention, input filter circuit includes：Inductance L1, L2, L3, electric capacity
C1、C2、C3；Three-phase electricity U phase output terminals are connected with inductance L1 one end, and V phase output terminals are connected with inductance L2 one end, W phase output terminals
Be connected with inductance L3 one end, the L1 other end is connected with electric capacity C1 one end, tie point output signal U U1, the L2 other end with
Electric capacity C2 one end connection, tie point output signal U V1, the L3 other end are connected with electric capacity C3 one end, tie point output letter
Number UW1, the C1 other end and the C2 other end, the C3 other end connect.
In another embodiment based on circuit of the present invention, three-phase chopper circuit includes：Power tube VT1, VT2, VT3,
VT4, VT5, VT6, VT1 inside include inside anti-paralleled diode D1, VT2 including inside anti-paralleled diode D2, VT3 including anti-
Include including including inside anti-paralleled diode D5, VT6 inside anti-paralleled diode D4, VT5 inside parallel diode D3, VT4
Anti-paralleled diode D6；Power tube VT1 drain electrode, power tube VT3 drain electrode connection, power tube VT5 drain electrode are as input
Signal UU1, UV1, UW1 are respectively connected to, power tube VT1 source electrode is connected with power tube VT2 source electrode, power tube VT3 source electrode
It is connected with power tube VT4 source electrode, power tube VT5 source electrode is connected with power tube VT6 source electrode, power tube VT1 grid, work(
Rate pipe VT2 grid, power tube VT3 grid, power tube VT4 grid, power tube VT5 grid, power tube VT6 grid
It is connected respectively with drive signal S1-S6 as control terminal；Power tube VT2 drain electrode, power tube VT4 drain electrode, power tube VT6
Drain electrode difference output voltage signal UU2, UV2, UW2.
In another embodiment based on circuit of the present invention, high-frequency filter circuit includes：Inductance L4, L5, L6, electric capacity
C4、C5、C6；L4 one end, L5 one end, L6 one end are respectively connected to voltage signal UU2, UV2, UW2, the L4 other end and electricity
Hold C4 one end connection, tie point output signal U U3, the L5 other end are connected with electric capacity C5 one end, tie point output signal
UV3, L6 other end are connected with electric capacity C6 one end, tie point output signal U W3, the C4 other end and the C5 other end, C6
The other end connection.
In another embodiment based on circuit of the present invention, rectified three-phase circuit includes：Diode D14, D15, D16,
D17、D18、D19；Wherein, diode D14 anode, diode D17 negative electrode connection, diode D15 anode, diode
D18 negative electrode connection, the negative electrode connection of diode D16 anode, diode D19, three tie points are distinguished defeated as input
Enter signal UU3, UV3, UW3；Diode D14 negative electrode is connected with diode D15 negative electrode, diode D16 negative electrode, tie point
For the first output end of rectified three-phase circuit, the anode of diode D17 anode and diode D18 anode, diode D19 connects
Connect, tie point is the second output end of rectified three-phase circuit, the first output end of rectified three-phase circuit and the output of the second output end
DC voltage Ud.
In another embodiment based on circuit of the present invention, buffering includes with leadage circuit：Power tube VT7, resistance R1,
Include anti-paralleled diode D7 inside electric capacity C7, power tube VT7；Power tube VT7 drain electrode is connected with C7 one end, tie point with
The first output end connection of rectified three-phase circuit, power tube VT7 source electrode are connected with resistance R1 one end, the R1 other end and C7
Other end connection, the second output end of tie point and rectified three-phase circuit connects, power tube VT7 grid as control terminal and
Drive signal S7 connections.
In another embodiment based on circuit of the present invention, three phase inverter bridge includes：Voltage sensor VT, current sense
Device CT, power tube VT8, VT9, VT10, VT11, VT12, VT13, VT8 inside includes including inside anti-paralleled diode D8, VT9
Include including in anti-paralleled diode D11, VT12 inside anti-paralleled diode D10, VT11 inside anti-paralleled diode D9, VT10
Portion includes including anti-paralleled diode D13 inside anti-paralleled diode D12, VT13；A VT input is with power tube VT7's
Drain electrode, electric capacity C7 one end, power tube VT8 drain electrode, power tube VT9 drain electrode, power tube VT10 drain electrode connection, sensor
The other end with R1, a CT input are connected VT another input respectively, CT another input respectively with electricity
Hold the C7 other end, power tube VT11 source electrode, power tube VT12 source electrode, power tube VT13 source electrode connection, VT output electricity
Press signal Volt, CT output current signal Cur, power tube VT8 grid, power tube VT9 grid, power tube VT10 grid
Pole, power tube VT11 grid, power tube VT12 grid, power tube VT13 grid are believed with driving respectively as control terminal
Number S8-S13 connections, power tube VT11 drain electrode are connected with power tube VT8 source electrode, tie point output AC voltage UA, power
Pipe VT12 drain electrode is connected with power tube VT9 source electrode, tie point output AC voltage UB, power tube VT13 drain electrode and power
Pipe VT10 source electrode connection, tie point output AC voltage UC, described alternating voltage UA, UB, UC are respectively connected to brushless dc
The A phase, B phase, C phase of machine machine winding.
In another embodiment based on circuit of the present invention, brshless DC motor outgoing position is signally attached to described
The capture interface of dsp controller, the A D interface of dsp controller and the output end of signal acquisition circuit connect, dsp controller PWM
Interface output drive signal P1-P13 and protection signal SD1, SD2 are connected to the input of drive circuit.
In another embodiment based on circuit of the present invention, signal acquisition circuit includes：Operational amplifier U8, U9, electricity
Hinder R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, electric capacity C8, C9, C10, C11, operation amplifier
Device U8 is identical with U9, and operational amplifier U8 includes：U8A, U8B, U8C, operational amplifier U9 include：U9A、U9B、U9C；Electric current passes
Sensor CT output terminating resistor R3 one end, resistance the R3 other end and resistance R4 one end, resistance R5 one end, computing are put
Big device U8B negative input end connection, the resistance R4 other end are connected with operational amplifier U8A negative input end, operational amplifier
U8A positive input terminal is connected with resistance R2 one end, and the resistance R2 other end is connected with reference voltage Ref, and resistance R5's is another
End is connected with operational amplifier U8A output end, resistance R7 one end, and resistance R6 one end is just defeated with operational amplifier U8B's
Enter end connection, GND is connected the resistance R6 other end with operational amplifier U8 power supply, and the resistance R7 other end is with electric capacity C8's
One end, resistance R8 one end connection, the positive input terminal of the resistance R8 other end and electric capacity C9 one end, operational amplifier U8C connect
Connect, GND is connected the electric capacity C9 other end with operational amplifier U8 power supply, operational amplifier U8 positive supply and direct current supply
Power supply+VCC connections, operational amplifier U8 negative supply are connected with DC power supply-VCC, the electric capacity C8 other end and computing
The A D interface connection of amplifier U8C output end, operational amplifier U8C negative input end, dsp controller, voltage sensor VT
Output terminating resistor R10 one end, resistance the R10 other end and resistance R11 one end, resistance R13 one end, operation amplifier
Device U9B negative input end connection, the resistance R11 other end are connected with operational amplifier U9A negative input end, operational amplifier
U9A positive input terminal is connected with resistance R9 one end, and the resistance R9 other end is connected with reference voltage Ref1, and resistance R13's is another
One end is connected with operational amplifier U9A output end, resistance R14 one end, and resistance R12 one end is with operational amplifier U9B's
Positive input terminal is connected, and GND is connected the resistance R12 other end with operational amplifier U9 power supply, resistance the R14 other end and electricity
Hold one end connection of C10 one end, resistance R15, the resistance R15 other end and electric capacity C11 one end, operational amplifier U9C
Positive input terminal is connected, and GND is connected the electric capacity C11 other end with operational amplifier U9 power supply, operational amplifier U9 positive electricity
Source is connected with DC power supply+VCC, and operational amplifier U9 negative supply is connected with DC power supply-VCC, electric capacity C10's
The other end is connected with the A D interface of operational amplifier U9C output end, operational amplifier U9C negative input end, dsp controller.
In another embodiment based on circuit of the present invention, drive circuit includes：Driving chip U1, U2, U3, U4, U5,
U6, U7, driving chip U1-U7 is identical, PWM the interface output drive signal P1-P13 and protection signal SD1 of dsp controller,
SD2, P1 input driving chip U1 input H, P2 input driving chip U1 input L, P3 input driving chip U2's is defeated
Enter and hold H, P4 input driving chips U2 input L, P5 input driving chip U3 input H, P6 input driving chip U3's
Input L, P7 input driving chip U7 input H, P8 input driving chip U4 input H, P9 input driving chip U5
Input H, P10 input driving chips U6 input H, P11 input driving chip U4 input L, P12 input driving core
Piece U5 input L, P13 input driving chip U6 input L, SD1 inputs driving chip U1 input SD, driving respectively
Chip U2 input SD, driving chip U3 input SD, SD2 input driving chip U4 input SD, driving core respectively
Piece U5 input SD, driving chip U6 input SD, driving chip U7 input SD；Driving chip U1 output end
G1, G2, driving chip U2 output end G1, G2, driving chip U3 output end G1, G2, difference output drive signal S1-S6,
Driving chip U4 output end G1, G2 difference output drive signal S8 and S11, driving chip U5 output end G1, G2 difference are defeated
Go out drive signal S9 and S12, driving chip U6 output end G1, G2 difference output drive signal S10 and S13, driving chip U7
Output end G1 output drive signals S7.
The present invention has the beneficial effect that：
The present invention uses dsp controller as main control chip, without the software algorithm of complexity, using three-phase chopper circuit pair
Brshless DC motor voltage is modulated, and without excessive inductance, is reduced motor torque ripple, is cut in start-up course using exchange
Ripple and three phase inverter bridge two-stage circuit are depressured, and reduce electric motor starting electric current, improve electric motor starting reliability, exception occur,
Exportable protection signal protection control circuit and motor.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing
In, identical reference symbol represents identical part.
Fig. 1 is one embodiment of the invention circuit diagram；
Fig. 2 is the circuit diagram of another embodiment of the present invention；
Fig. 3 is drive circuit schematic diagram；
Fig. 4 is signal acquisition circuit circuit diagram.
Wherein, 1：Input filter circuit；2：Three-phase chopper circuit；3：High-frequency filter circuit；4：Rectified three-phase circuit；5：It is slow
Punching and leadage circuit；6：Three phase inverter bridge；7：Dsp controller；8：Signal acquisition circuit；9：Drive circuit.
Embodiment
The preferred embodiments of the present invention are specifically described below in conjunction with the accompanying drawings, wherein, accompanying drawing forms the application part, and
It is used for the principle for explaining the present invention together with embodiments of the present invention.
The embodiment of the present application provides a kind of brushless DC motor control circuit,
Specifically include as shown in Figure 1：Input filter, three-phase chopper circuit, high-frequency filter circuit, rectified three-phase circuit,
Buffering and leadage circuit, three phase inverter bridge, dsp controller, signal acquisition circuit and drive circuit；Wherein Three-phase alternating current signal
UU, UV, UW are connected to the input of input filter, and input filter output signal U U1, UV1, UW1 are connected to three-phase copped wave electricity
The input on road, three-phase chopper circuit output voltage signal UU2, UV2, UW2 are connected to the input of high-frequency filter circuit, high frequency
Filter circuit output signal U U3, UV3, UW3 are connected to the input of rectified three-phase circuit, rectified three-phase circuit output direct current
Pressure Ud is connected to buffering and the input of leadage circuit, and buffering is connected to three-phase inversion with leadage circuit output DC voltage Ud1
The input of bridge, three phase inverter bridge output AC voltage UA, UB, UC are connected to brshless DC motor, the voltage of three phase inverter bridge
It is connected to the input of signal acquisition circuit with current signal Volt, Cur, Brushless DC Motor Position signal HallA, HallB,
HallC is connected to the capture interface of dsp controller, and output signal Volt1, Cur1 of signal acquisition circuit is connected to DSP controls
The A D interface of device, dsp controller PWM interfaces output pwm signal and protection signal are connected to the input of drive circuit, driving electricity
Road output drive signal S1-S6 is connected to the control terminal of three-phase chopper circuit, and drive circuit output drive signal S7 is connected to slow
Punching and the control of leadage circuit, drive circuit output drive signal S8-S13 are connected to the control of three phase inverter bridge.
In another embodiment of the present invention, as shown in Figure 2：
Input filter circuit includes：Inductance L1, L2, L3, electric capacity C1, C2, C3；Three-phase electricity U phase output terminals and inductance L1 mono-
End connection, V phase output terminals are connected with inductance L2 one end, and W phase output terminals are connected with inductance L3 one end, the L1 other end and electric capacity C1
One end connection, tie point output signal U U1, the L2 other end is connected with electric capacity C2 one end, tie point output signal U V1,
The L3 other end is connected with electric capacity C3 one end, tie point output signal U W1, the C1 other end and the C2 other end, C3 it is another
One end connects.
Three-phase chopper circuit includes：Power tube VT1, VT2, VT3, VT4, VT5, VT6, VT1 inside include the pole of inverse parallel two
Include including including inverse parallel two inside anti-paralleled diode D3, VT4 inside anti-paralleled diode D2, VT3 inside pipe D1, VT2
Include including anti-paralleled diode D6 inside anti-paralleled diode D5, VT6 inside pole pipe D4, VT5；Power tube VT1 drain electrode, work(
Rate pipe VT3 drain electrode connection, power tube VT5 drain electrode is respectively connected to signal UU1, UV1, UW1, power tube VT1 as input
Source electrode be connected with power tube VT2 source electrode, power tube VT3 source electrode is connected with power tube VT4 source electrode, power tube VT5's
Source electrode is connected with power tube VT6 source electrode, power tube VT1 grid, power tube VT2 grid, power tube VT3 grid, work(
Rate pipe VT4 grid, power tube VT5 grid, power tube VT6 grid connect with drive signal S1-S6 respectively as control terminal
Connect；Power tube VT2 drain electrode, power tube VT4 drain electrode, power tube VT6 drain electrode difference output voltage signal UU2, UV2,
UW2。
High-frequency filter circuit includes：Inductance L4, L5, L6, electric capacity C4, C5, C6；L4 one end, L5 one end, L6 one end
Voltage signal UU2, UV2, UW2 are respectively connected to, the L4 other end is connected with electric capacity C4 one end, tie point output signal U U3, L5
The other end be connected with electric capacity C5 one end, the other end of tie point output signal U V3, L6 is connected with electric capacity C6 one end, even
Contact output signal U W3, the C4 other end and the C5 other end, the C6 other end connect.
Rectified three-phase circuit includes：Diode D14, D15, D16, D17, D18, D19；Wherein, diode D14 anode,
Diode D17 negative electrode connection, the negative electrode connection of diode D15 anode, diode D18, diode D16 anode, two poles
Pipe D19 negative electrode connection, three tie points are as input difference input signal UU3, UV3, UW3；Diode D14 negative electrode with
The negative electrode connection of diode D15 negative electrode, diode D16, tie point are the first output end of rectified three-phase circuit, diode
D17 anode is connected with diode D18 anode, diode D19 anode, and tie point exports for the second of rectified three-phase circuit
End, the first output end of rectified three-phase circuit and the second output end output DC voltage Ud.
Buffering includes with leadage circuit：Power tube VT7, resistance R1, electric capacity C7, power tube VT7 inside include inverse parallel two
Pole pipe D7；Power tube VT7 drain electrode is connected with C7 one end, the first output end connection of tie point and rectified three-phase circuit, work(
Rate pipe VT7 source electrode is connected with resistance R1 one end, and the R1 other end and the C7 other end connect, tie point and three phase rectifier electricity
The second output end connection on road, power tube VT7 grid are connected as control terminal with drive signal S7.
Three phase inverter bridge includes：Voltage sensor VT, current sensor CT, power tube VT8, VT9, VT10, VT11,
VT12, VT13, VT8 inside include inside anti-paralleled diode D8, VT9 including inside anti-paralleled diode D9, VT10 including anti-
Include including in anti-paralleled diode D12, VT13 inside anti-paralleled diode D11, VT12 inside parallel diode D10, VT11
Portion includes anti-paralleled diode D13；A VT input and power tube VT7 drain electrode, electric capacity C7 one end, power tube VT8
Drain electrode, power tube VT9 drain electrode, power tube VT10 drain electrode connection, sensor VT another input is respectively with R1's
The input connection of the other end, CT, CT another input other end with electric capacity C7, power tube VT11 source respectively
Pole, the source electrode connection of power tube VT12 source electrode, power tube VT13, VT output voltage signal Volt, CT output current signals
Cur, power tube VT8 grid, power tube VT9 grid, power tube VT10 grid, power tube VT11 grid, power tube
VT12 grid, power tube VT13 grid are connected, power tube VT11 leakage with drive signal S8-S13 respectively as control terminal
Pole is connected with power tube VT8 source electrode, tie point output AC voltage UA, power tube VT12 drain electrode and power tube VT9 source
Pole is connected, and tie point output AC voltage UB, power tube VT13 drain electrode are connected with power tube VT10 source electrode, tie point output
Alternating voltage UC.Alternating voltage UA, UB, UC are respectively connected to the A phase, B phase, C phase of brshless DC motor machine winding.
Dsp controller is specially dsp chip commonly used in the prior art, brshless DC motor outgoing position signal HallA,
HallB, HallC are connected to the capture interface of dsp controller, the A D interface of dsp controller and the output end of signal acquisition circuit
Connection, dsp controller PWM interface output drive signal P1-P13 and protection signal SD1, SD2 are connected to the input of drive circuit
End.
Signal acquisition circuit includes：Operational amplifier U8, U9, resistance R2, R3, R4, R5, R6, R7, R8, R9, R10, R11,
R12, R13, R14, R15, electric capacity C8, C9, C10, C11, operational amplifier U8 is identical with U9, and operational amplifier U8 includes：U8A、
U8B, U8C, operational amplifier U9 include：U9A、U9B、U9C；Current sensor CT output terminating resistor R3 one end, resistance
The R3 other end is connected with resistance R4 one end, resistance R5 one end, operational amplifier U8B negative input end, and resistance R4's is another
One end is connected with operational amplifier U8A negative input end, and operational amplifier U8A positive input terminal is connected with resistance R2 one end,
The resistance R2 other end is connected with reference voltage Ref, the resistance R5 other end and operational amplifier U8A output end, resistance R7
One end connection, resistance R6 one end is connected with operational amplifier U8B positive input terminal, resistance the R6 other end and operation amplifier
Device U8 power supply GND connections, the resistance R7 other end be connected with electric capacity C8 one end, resistance R8 one end, resistance R8's is another
One end is connected with electric capacity C9 one end, operational amplifier U8C positive input terminal, and the electric capacity C9 other end is with operational amplifier U8's
Power supply GND connections, operational amplifier U8 positive supply be connected with DC power supply+VCC, operational amplifier U8 negative supply
It is connected with DC power supply-VCC, the electric capacity C8 other end and operational amplifier U8C output end, operational amplifier U8C
The A D interface connection of negative input end, dsp controller, voltage sensor VT output terminating resistor R10 one end, resistance R10's
The other end is connected with resistance R11 one end, resistance R13 one end, operational amplifier U9B negative input end, and resistance R11's is another
End is connected with operational amplifier U9A negative input end, and operational amplifier U9A positive input terminal is connected with resistance R9 one end, electricity
The resistance R9 other end is connected with reference voltage Ref1, the resistance R13 other end and operational amplifier U9A output end, resistance R14
One end connection, resistance R12 one end is connected with operational amplifier U9B positive input terminal, and resistance the R12 other end and computing are put
Big device U9 power supply GND connections, the resistance R14 other end be connected with electric capacity C10 one end, resistance R15 one end, resistance
The R15 other end is connected with electric capacity C11 one end, operational amplifier U9C positive input terminal, the electric capacity C11 other end and computing
Amplifier U9 power supply GND connections, operational amplifier U9 positive supply be connected with DC power supply+VCC, operational amplifier
U9 negative supply is connected with DC power supply-VCC, the electric capacity C10 other end and operational amplifier U9C output end, computing
The A D interface connection of amplifier U9C negative input end, dsp controller.
Drive circuit includes：Driving chip U1, U2, U3, U4, U5, U6, U7, driving chip U1-U7 is identical, dsp controller
PWM interface output drive signal P1-P13 and protection signal SD1, SD2, P1 inputs driving chip U1 input H, P2 input
Driving chip U1 input L, P3 input driving chip U2 input H, P4 input driving chip U2 input L, P5 is defeated
Enter driving chip U3 input H, P6 input driving chip U3 input L, P7 input driving chip U7 input H, P8
Driving chip U4 input H, P9 input driving chip U5 input H, P10 input driving chip U6 input H is inputted,
P11 input driving chips U4 input L, P12 input driving chip U5 input L, P13 input driving chip U6 input
L, SD1 is held to input driving chip U1 input SD, driving chip U2 input SD, driving chip U3 input respectively
SD, SD2 input respectively driving chip U4 input SD, driving chip U5 input SD, driving chip U6 input SD,
Driving chip U7 input SD；Driving chip U1 output end G1, G2, driving chip U2 output end G1, G2, driving chip
U3 output end G1, G2, output drive signal S1-S6, driving chip U4 output end G1, G2 distinguish output drive signal respectively
S8 and S11, driving chip U5 output end G1, G2 difference output drive signal S9 and S12, driving chip U6 output end G1,
G2 difference output drive signal S10 and S13, driving chip U7 output end G1 output drive signals S7.
For different brshless DC motors, the armature inductance of motor is different with armature resistance, when the motor is energized, due to
Motor speed is very low, winding back emf very little, if the voltage being added on motor is without restriction, excessive electric current may damage
Motor and control circuit, particularly with high-speed brushless DC electromotor, the armature inductance and armature resistance of motor are very small, more need
Motor is depressured to reduce electric motor starting electric current.During electric motor starting, dsp controller by reading motor position signal,
The actual speed of motor is obtained using the motor position signal read in the set time, when motor speed is less than rated speed 5%
When, dsp controller output pwm signal P1-P6 to drive circuit, drive circuit output drive signal S1-S6 to three-phase copped wave electricity
Road reduce three-phase chopper circuit output voltage UU2, UV2, UW2, so as to reduce high-frequency filter circuit output signal U U3, UU3,
UW3, rectified three-phase circuit output DC voltage Ud, buffering and leadage circuit output DC voltage Ud1 are reduced, so as to reduce three-phase
The input direct voltage of inverter bridge, reach reduce three phase inverter bridge output AC voltage UA, UB, UC purpose, signal P1,
P2, P3, P4, P5, P6 dutycycle are 10%, after overdrive circuit, signal S1, S2, S3, S4, S5, S6 dutycycle
It is 10%, now, in three-phase chopper circuit, when U phases are in positive axis, under signal S1 driving, power tube VT2 is anti-
Parallel diode D2 and power tube VT1 conductings, power tube VT2 are off state, power due to diode D2 clamping action
Pipe VT1 anti-paralleled diodes D1 turns off due to bearing back-pressure, when U phases are in negative semiaxis, under signal S2 driving, and power
Pipe VT1 anti-paralleled diodes D1 and power tube VT2 are turned on, and power tube VT1 is off shape due to diode D1 clamping action
State, power tube VT2 anti-paralleled diodes D2 turn off due to bearing back-pressure, when V phases are in positive axis, in signal S3 driving
Under, power tube VT4 anti-paralleled diodes D4 and power tube VT3 conducting, power tube VT4 are in due to diode D4 clamping action
Off state, power tube VT3 anti-paralleled diodes D3 turn off due to bearing back-pressure, when V phases are in negative semiaxis, in signal S4
Driving under, power tube VT3 anti-paralleled diodes D3 and power tube VT4 conducting, power tube VT3 due to diode D3 clamper make
Turned off with off state, power tube VT4 anti-paralleled diodes D4 due to bearing back-pressure, when W phases are in positive axis,
Under signal S5 driving, power tube VT6 anti-paralleled diodes D6 and power tube VT5 conducting, power tube VT6 is due to diode D6's
Clamping action is off state, and power tube VT5 anti-paralleled diodes D5 turns off due to bearing back-pressure, when W phases are in negative half
During axle, under signal S6 driving, power tube VT5 anti-paralleled diodes D5 and power tube VT6 conducting, power tube VT5 is due to two
Pole pipe D5 clamping action is off state, and power tube VT6 anti-paralleled diodes D6 turns off due to bearing back-pressure.Meanwhile
Dsp controller is electric to driving by the state output pwm signal P8-P13 for reading motor position signal HallA, HallB, HallC
Road, drive circuit output drive signal S8-S13 to three phase inverter bridge, three-phase inversion bridge voltage is modulated, further reduced
Output AC voltage UA, UB, UC of three phase inverter bridge, so as to reduce the starting current of motor.If motor rotates forward, work as HallA
Be low level for high level, HallB, HallC is when being high level, now conducting corresponding to motor is mutually A+ and B-, signal S8,
S12 dutycycles are equal to motor actual speed divided by 5% rated speed, and signal S9, S10, S11, S13 dutycycle are 0, power tube
VT8, VT12 switch modulation, the permanent shut-off of power tube VT9, VT10, VT11, VT13；When HallA is high level, HallB is low electricity
When flat, HallC is low level, now conducting corresponding to motor is mutually A+ and C-, and it is actual that signal S8, S13 dutycycle are equal to motor
Rotating speed divided by 5% rated speed, signal S9, S10, S11, S12 dutycycle are 0, power tube VT8, VT13 switch modulation, power
The permanent shut-off of pipe VT9, VT10, VT11, VT12；When HallA is high level, HallB is high level, HallC is low level, now
Conducting is mutually B+ and C- corresponding to motor, and signal S9, S13 dutycycle are equal to motor actual speed divided by 5% rated speed, signal
S8, S10, S11, S12 dutycycle are 0, power tube VT9, VT13 switch modulation, power tube VT8, VT10, VT11, VT12 Heng Guan
It is disconnected；When HallA is low level, HallB is high level, HallC is low level, now conducting corresponding to motor mutually for B+ and
A-, signal S9, S11 dutycycle are equal to motor actual speed divided by 5% rated speed, signal S8, S10, S12, S13 dutycycle
For 0, power tube VT9, VT11 switch modulation, the permanent shut-off of power tube VT8, VT10, VT12, VT13；When HallA be low level,
When HallB is high level, HallC is high level, it is mutually C+ and A- now to be turned on corresponding to motor, signal S10, S11 dutycycle
Equal to motor actual speed divided by 5% rated speed, signal S8, S9, S12, S13 dutycycle are 0, power tube VT10, VT11
Switch modulation, the permanent shut-off of power tube VT8, VT9, VT12, VT13；When HallA is low level, HallB is low level, HallC is
During high level, now conducting corresponding to motor be mutually C+ and B-, signal S10, S12 dutycycle equal to motor actual speed divided by
5% rated speed, signal S8, S9, S11, S13 dutycycle are 0, power tube VT10, VT12 switch modulation, power tube VT8,
The permanent shut-off of VT9, VT11, VT13；If motor reversal, when HallA is low level, HallB is high level, HallC is low level
When, now conducting is mutually A+ and B- corresponding to motor, and signal S8, S12 dutycycle are equal to motor actual speed divided by 5% specified turn
Speed, signal S9, S10, S11, S13 dutycycle are 0, power tube VT8, VT12 switch modulation, power tube VT9, VT10, VT11,
The permanent shut-offs of VT13；When HallA is low level, HallB is high level, HallC is high level, now conducting phase corresponding to motor
For A+ and C-, signal S8, S13 dutycycle are equal to motor actual speed divided by 5% rated speed, signal S9, S10, S11, S12's
Dutycycle is 0, power tube VT8, VT13 switch modulation, the permanent shut-off of power tube VT9, VT10, VT11, VT12；When HallA is low electricity
When flat, HallB is low level, HallC is high level, it is mutually B+ and C- now to be turned on corresponding to motor, signal S9, S13 duty
It is 0 than the dutycycle equal to motor actual speed divided by 5% rated speed, signal S8, S10, S11, S12, power tube VT9,
VT13 switch modulations, the permanent shut-off of power tube VT8, VT10, VT11, VT12；When HallA is high level, HallB be low level,
When HallC is high level, now conducting is mutually B+ and A- corresponding to motor, and signal S9, S11 dutycycle are equal to motor actual speed
Divided by 5% rated speed, signal S8, S10, S12, S13 dutycycle are 0, power tube VT9, VT11 switch modulation, power tube
The permanent shut-off of VT8, VT10, VT12, VT13；It is now electric when HallA is high level, HallB is low level, HallC is low level
Conducting is mutually C+ and A- corresponding to machine, and signal S10, S11 dutycycle are equal to motor actual speed divided by 5% rated speed, signal
S8, S9, S12, S13 dutycycle are 0, power tube VT10, VT11 switch modulation, power tube VT8, VT9, VT12, VT13 Heng Guan
It is disconnected；When HallA is high level, HallB is high level, HallC is low level, now conducting corresponding to motor mutually for C+ and
B-, signal S10, S12 dutycycle are equal to motor actual speed divided by 5% rated speed, signal S8, S9, S11, S13 dutycycle
For 0, power tube VT10, VT12 switch modulation, the permanent shut-off of power tube VT8, VT9, VT11, VT13.
When motor speed is more than or equal to rated speed 5%, dsp controller is cut according to position signalling using given rotating speed
The motor actual speed obtained is calculated, difference is carried out to obtain a given value of current value i* after PID is calculated, dsp controller leads to
The output signal Cur1 for crossing reading signal acquisition circuit obtains the electric current i of motor busM, dsp controller utilizes given value of current value
I* subtracts the electric current i of motor busM, difference is carried out to obtain a numerical value d between 0~1 after PID is calculated, d is made
Dutycycle for signal P1, P2, P3, P4, P5, P6 is output to drive circuit, after overdrive circuit, signal S1, S2, S3,
S4, S5, S6 dutycycle are d, so as to control the output voltage of three-phase chopper circuit in real time, are turned so as to reach real-time controlled motor
The purpose of speed, in three-phase alternating current, when U phases are in positive axis, under signal S1 driving, power tube VT2 inverse parallels two
Pole pipe D2 and power tube VT1 conductings, for power tube VT2 because diode D2 clamping action is off state, power tube VT1 is anti-
Parallel diode D1 turns off due to bearing back-pressure, and when U phases are in negative semiaxis, under signal S2 driving, power tube VT1 is anti-
Parallel diode D1 and power tube VT2 conductings, power tube VT1 are off state, power due to diode D1 clamping action
Pipe VT2 anti-paralleled diodes D2 turns off due to bearing back-pressure, when V phases are in positive axis, under signal S3 driving, and power
Pipe VT4 anti-paralleled diodes D4 and power tube VT3 are turned on, and power tube VT4 is off shape due to diode D4 clamping action
State, power tube VT3 anti-paralleled diodes D3 turn off due to bearing back-pressure, when V phases are in negative semiaxis, in signal S4 driving
Under, power tube VT3 anti-paralleled diodes D3 and power tube VT4 conducting, power tube VT3 are in due to diode D3 clamping action
Off state, power tube VT4 anti-paralleled diodes D4 turn off due to bearing back-pressure, when W phases are in positive axis, in signal S5
Driving under, power tube VT6 anti-paralleled diodes D6 and power tube VT5 conducting, power tube VT6 due to diode D6 clamper make
Turned off with off state, power tube VT5 anti-paralleled diodes D5 due to bearing back-pressure, when W phases are in negative semiaxis,
Under signal S6 driving, power tube VT5 anti-paralleled diodes D5 and power tube VT6 conducting, power tube VT5 is due to diode D5's
Clamping action is off state, and power tube VT6 anti-paralleled diodes D6 turns off due to bearing back-pressure.
Meanwhile dsp controller is by reading motor position signal HallA, HallB, HallC state output pwm signal
P8-P13 output drive signal S8-S13 to three phase inverter bridge, is less than the phase of rated speed 5% to drive circuit with motor speed
Than when motor speed is more than or equal to rated speed 5%, in the speed regulation process of motor, three-phase chopper circuit is realized alone pair
The dynamic modulation of electric moter voltage, three phase inverter bridge only realize commutation without being modulated, i.e. the conducting phase of three phase inverter bridge accounts for
Sky than it is permanent be 1, if motor rotates forward, when HallA is high level, HallB is low level, HallC is high level, now motor
Corresponding conducting is mutually A+ and B-, and signal S8, S12 dutycycle are 1, and signal S9, S10, S11, S13 dutycycle are 0, power tube
VT8, VT12 perseverance are open-minded, the permanent shut-off of power tube VT9, VT10, VT11, VT13；When HallA is high level, HallB be low level,
When HallC is low level, now conducting corresponding to motor is mutually A+ and C-, and signal S8, S13 dutycycle are 1, signal S9, S10,
S11, S12 dutycycle are 0, and power tube VT8, VT13 perseverance is open-minded, the permanent shut-off of power tube VT9, VT10, VT11, VT12；When
When HallA is high level, HallB is high level, HallC is low level, it is mutually B+ and C- now to be turned on corresponding to motor, signal
S9, S13 dutycycle are 1, and signal S8, S10, S11, S12 dutycycle are 0, and power tube VT9, VT13 perseverance is open-minded, power tube VT8,
The permanent shut-off of VT10, VT11, VT12；When HallA is low level, HallB is high level, HallC is low level, now motor pair
The conducting answered is mutually B+ and A-, and signal S9, S11 dutycycle are 1, and signal S8, S10, S12, S13 dutycycle are 0, power tube
VT9, VT11 perseverance are open-minded, the permanent shut-off of power tube VT8, VT10, VT12, VT13；When HallA is low level, HallB be high level,
When HallC is high level, now conducting corresponding to motor is mutually C+ and A-, and signal S10, S11 dutycycle are 1, signal S8, S9,
S12, S13 dutycycle are 0, and power tube VT10, VT11 perseverance is open-minded, the permanent shut-off of power tube VT8, VT9, VT12, VT13；When
When HallA is low level, HallB is low level, HallC is high level, it is mutually C+ and B- now to be turned on corresponding to motor, signal
S10, S12 dutycycle are 1, and signal S8, S9, S11, S13 dutycycle are 0, and power tube VT10, VT12 perseverance is open-minded, power tube
The permanent shut-off of VT8, VT9, VT11, VT13；If motor reversal, when HallA is low level, HallB is high level, HallC is low
During level, now conducting corresponding to motor is mutually A+ and B-, and signal S8, S12 dutycycle are 1, signal S9, S10, S11, S13's
Dutycycle is 0, and power tube VT8, VT12 perseverance is open-minded, the permanent shut-off of power tube VT9, VT10, VT11, VT13；When HallA is low electricity
When flat, HallB is high level, HallC is high level, it is mutually A+ and C- now to be turned on corresponding to motor, signal S8, S13 duty
Than for 1, signal S9, S10, S11, S12 dutycycle are 0, and power tube VT8, VT13 perseverance is open-minded, power tube VT9, VT10, VT11,
The permanent shut-offs of VT12；When HallA is low level, HallB is low level, HallC is high level, now conducting phase corresponding to motor
For B+ and C-, signal S9, S13 dutycycle are 1, and signal S8, S10, S11, S12 dutycycle are 0, and power tube VT9, VT13 perseverance is opened
It is logical, the permanent shut-off of power tube VT8, VT10, VT11, VT12；When HallA is high level, HallB is low level, HallC is high level
When, now conducting corresponding to motor is mutually B+ and A-, and signal S9, S11 dutycycle are 1, signal S8, S10, S12, S13 duty
Than for 0, power tube VT9, VT11 perseverance is open-minded, the permanent shut-off of power tube VT8, VT10, VT12, VT13；When HallA be high level,
When HallB is low level, HallC is low level, it is mutually C+ and A- now to be turned on corresponding to motor, signal S10, S11 dutycycle
For 1, signal S8, S9, S12, S13 dutycycle are 0, and power tube VT10, VT11 perseverance is open-minded, power tube VT8, VT9, VT12,
The permanent shut-offs of VT13；When HallA is high level, HallB is high level, HallC is low level, now conducting phase corresponding to motor
For C+ and B-, signal S10, S12 dutycycle are 1, and signal S8, S9, S11, S13 dutycycle are 0, and power tube VT10, VT12 are permanent
It is open-minded, the permanent shut-off of power tube VT8, VT9, VT11, VT13.
When motor in the process of running, dsp controller by the real-time output signal Volt1 for reading signal acquisition circuit and
Cur1, exceed limit value if there is Volt1 values, it was demonstrated that overvoltage occurs in three phase inverter bridge DC bus-bar voltage, and dsp controller will
Meeting output signal P7 produces drive signal S7 and is input to buffering and bleed-off circuit, busbar voltage is adjusted to drive circuit；
If excessively stream occurs in motor, the output signal Cur1 values of Acquisition Circuit will exceed limit value, and dsp controller is by output protection
Signal SD1, SD2, shut-off three-phase chopper circuit, buffering and bleed-off circuit, three phase inverter bridge, protect control circuit and motor not by
Damage.
The present invention has the beneficial effect that：
The present invention uses dsp controller as main control chip, without the software algorithm of complexity, using three-phase chopper circuit pair
Brshless DC motor voltage is modulated, and without excessive inductance, is reduced motor torque ripple, is cut in start-up course using exchange
Ripple and three phase inverter bridge two-stage circuit are depressured, and reduce electric motor starting electric current, improve electric motor starting reliability, exception occur,
Exportable protection signal protection control circuit and motor.
It will be understood by those skilled in the art that realizing all or part of flow of above-described embodiment method, meter can be passed through
Calculation machine program instructs the hardware of correlation to complete, and described program can be stored in computer-readable recording medium.Wherein, institute
Computer-readable recording medium is stated as disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.
Claims (10)
- A kind of 1. brushless DC motor control circuit, it is characterised in that including：Three-phase chopper circuit, high-frequency filter circuit, three-phase Rectification circuit, buffering and leadage circuit, three phase inverter bridge, dsp controller, signal acquisition circuit and drive circuit；Wherein three-phase Ac signal is connected to the input of three-phase chopper circuit, three-phase chopper circuit output voltage letter after input filter filters The input of rectified three-phase circuit number is connected to after high-frequency filter circuit filters, rectified three-phase circuit output DC voltage Ud connects Buffering and the input of leadage circuit are connected to, buffering is connected to the defeated of three phase inverter bridge with leadage circuit output DC voltage Ud1 Enter end, three phase inverter bridge output AC voltage to brshless DC motor, signal acquisition circuit collection three phase inverter bridge voltage and Current signal, Brushless DC Motor Position signal input dsp controller capture interface, the output voltage of signal acquisition circuit and Current signal is connected to the A D interface of dsp controller, and dsp controller PWM interfaces output pwm signal and protection signal are connected to drive The input of dynamic circuit, drive circuit output drive signal S1-S6 are connected to the control terminal of three-phase chopper circuit, and drive circuit is defeated Go out drive signal S7 and be connected to buffering and the control terminal of leadage circuit, drive circuit output drive signal S8-S13 is connected to three-phase The control terminal of inverter bridge.
- 2. circuit as claimed in claim 1, it is characterised in that the input filter circuit includes：Inductance L1, L2, L3, electric capacity C1、C2、C3；Three-phase electricity U phase output terminals are connected with inductance L1 one end, and V phase output terminals are connected with inductance L2 one end, W phase output terminals Be connected with inductance L3 one end, the L1 other end is connected with electric capacity C1 one end, tie point output signal U U1, the L2 other end with Electric capacity C2 one end connection, tie point output signal U V1, the L3 other end are connected with electric capacity C3 one end, tie point output letter Number UW1, the C1 other end and the C2 other end, the C3 other end connect.
- 3. circuit as claimed in claim 2, it is characterised in that the three-phase chopper circuit includes：Power tube VT1, VT2, VT3, VT4, VT5, VT6, VT1 inside include including bag inside anti-paralleled diode D2, VT3 inside anti-paralleled diode D1, VT2 Include includes including inside anti-paralleled diode D5, VT6 inside anti-paralleled diode D4, VT5 inside anti-paralleled diode D3, VT4 Including anti-paralleled diode D6；Power tube VT1 drain electrode, power tube VT3 drain electrode connection, power tube VT5 drain electrode are as defeated Enter end and be respectively connected to signal UU1, UV1, UW1, power tube VT1 source electrode is connected with power tube VT2 source electrode, power tube VT3's Source electrode is connected with power tube VT4 source electrode, and power tube VT5 source electrode is connected with power tube VT6 source electrode, power tube VT1 grid Pole, power tube VT2 grid, power tube VT3 grid, power tube VT4 grid, power tube VT5 grid, power tube VT6 Grid be connected respectively with drive signal S1-S6 as control terminal；Power tube VT2 drain electrode, power tube VT4 drain electrode, power Pipe VT6 drain electrode difference output voltage signal UU2, UV2, UW2.
- 4. circuit as claimed in claim 3, it is characterised in that the high-frequency filter circuit includes：Inductance L4, L5, L6, electric capacity C4、C5、C6；L4 one end, L5 one end, L6 one end are respectively connected to voltage signal UU2, UV2, UW2, the L4 other end and electricity Hold C4 one end connection, tie point output signal U U3, the L5 other end are connected with electric capacity C5 one end, tie point output signal UV3, L6 other end are connected with electric capacity C6 one end, tie point output signal U W3, the C4 other end and the C5 other end, C6 The other end connection.
- 5. circuit as claimed in claim 4, it is characterised in that the rectified three-phase circuit includes：Diode D14, D15, D16、D17、D18、D19；Wherein, diode D14 anode, diode D17 negative electrode connection, diode D15 anode, two poles Pipe D18 negative electrode connection, the negative electrode connection of diode D16 anode, diode D19, three tie points are distinguished as input Input signal UU3, UV3, UW3；Diode D14 negative electrode is connected with diode D15 negative electrode, diode D16 negative electrode, connection Point is the first output end of rectified three-phase circuit, diode D17 anode and diode D18 anode, diode D19 anode Connection, tie point are the second output end of rectified three-phase circuit, and the first output end and the second output end of rectified three-phase circuit are defeated Go out DC voltage Ud.
- 6. circuit as claimed in claim 5, it is characterised in that the buffering includes with leadage circuit：Power tube VT7, resistance R1, electric capacity C7, power tube VT7 inside include anti-paralleled diode D7；Power tube VT7 drain electrode is connected with C7 one end, connection Point is connected with the first output end of rectified three-phase circuit, and power tube VT7 source electrode is connected with resistance R1 one end, the R1 other end It is connected with the C7 other end, the second output end connection of tie point and rectified three-phase circuit, power tube VT7 grid is as control End is connected with drive signal S7.
- 7. circuit as claimed in claim 6, it is characterised in that the three phase inverter bridge includes：Voltage sensor VT, electric current pass Sensor CT, power tube VT8, VT9, VT10, VT11, VT12, VT13, VT8 inside include wrapping inside anti-paralleled diode D8, VT9 Include includes including anti-paralleled diode D11, VT12 inside anti-paralleled diode D10, VT11 inside anti-paralleled diode D9, VT10 Inside includes including anti-paralleled diode D13 inside anti-paralleled diode D12, VT13；A VT input and power tube VT7 Drain electrode, electric capacity C7 one end, power tube VT8 drain electrode, power tube VT9 drain electrode, power tube VT10 drain electrode connection, sensing The other end with R1, a CT input are connected device VT another input respectively, CT another input respectively with The source electrode connection of the electric capacity C7 other end, power tube VT11 source electrode, power tube VT12 source electrode, power tube VT13, VT outputs Voltage signal Volt, CT output current signal Cur, power tube VT8 grid, power tube VT9 grid, power tube VT10 grid Pole, power tube VT11 grid, power tube VT12 grid, power tube VT13 grid are believed with driving respectively as control terminal Number S8-S13 connections, power tube VT11 drain electrode are connected with power tube VT8 source electrode, tie point output AC voltage UA, power Pipe VT12 drain electrode is connected with power tube VT9 source electrode, tie point output AC voltage UB, power tube VT13 drain electrode and power Pipe VT10 source electrode connection, tie point output AC voltage UC, described alternating voltage UA, UB, UC are respectively connected to brushless dc The A phase, B phase, C phase of machine machine winding.
- 8. circuit as claimed in claim 7, it is characterised in that the brshless DC motor outgoing position is signally attached to described The capture interface of dsp controller, the A D interface of dsp controller and the output end of signal acquisition circuit connect, dsp controller PWM Interface output drive signal P1-P13 and protection signal SD1, SD2 are connected to the input of drive circuit.
- 9. circuit as claimed in claim 8, it is characterised in that the signal acquisition circuit includes：Operational amplifier U8, U9, Resistance R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, electric capacity C8, C9, C10, C11, computing are put Big device U8 is identical with U9, and operational amplifier U8 includes：U8A, U8B, U8C, operational amplifier U9 include：U9A、U9B、U9C；Electric current Sensor CT output terminating resistor R3 one end, resistance the R3 other end and resistance R4 one end, resistance R5 one end, computing Amplifier U8B negative input end connection, the resistance R4 other end are connected with operational amplifier U8A negative input end, operation amplifier Device U8A positive input terminal is connected with resistance R2 one end, and the resistance R2 other end is connected with reference voltage Ref, and resistance R5's is another One end is connected with operational amplifier U8A output end, resistance R7 one end, and resistance R6 one end and operational amplifier U8B are just Input is connected, and GND is connected the resistance R6 other end with operational amplifier U8 power supply, resistance the R7 other end and electric capacity C8 One end, resistance R8 one end connection, the resistance R8 other end and electric capacity C9 one end, operational amplifier U8C positive input terminal Connection, GND is connected the electric capacity C9 other end with operational amplifier U8 power supply, and operational amplifier U8 positive supply and direct current supply Power supply+VCC connections, operational amplifier U8 negative supply are connected with DC power supply-VCC, electric capacity the C8 other end and fortune Calculate the A D interface connection of amplifier U8C output end, operational amplifier U8C negative input end, dsp controller, voltage sensor VT output terminating resistor R10 one end, resistance the R10 other end and resistance R11 one end, resistance R13 one end, computing are put Big device U9B negative input end connection, the resistance R11 other end are connected with operational amplifier U9A negative input end, operational amplifier U9A positive input terminal is connected with resistance R9 one end, and the resistance R9 other end is connected with reference voltage Ref1, and resistance R13's is another One end is connected with operational amplifier U9A output end, resistance R14 one end, and resistance R12 one end is with operational amplifier U9B's Positive input terminal is connected, and GND is connected the resistance R12 other end with operational amplifier U9 power supply, resistance the R14 other end and electricity Hold one end connection of C10 one end, resistance R15, the resistance R15 other end and electric capacity C11 one end, operational amplifier U9C Positive input terminal is connected, and GND is connected the electric capacity C11 other end with operational amplifier U9 power supply, operational amplifier U9 positive electricity Source is connected with DC power supply+VCC, and operational amplifier U9 negative supply is connected with DC power supply-VCC, electric capacity C10's The other end is connected with the A D interface of operational amplifier U9C output end, operational amplifier U9C negative input end, dsp controller.
- 10. circuit as claimed in claim 9, it is characterised in that the drive circuit includes：Driving chip U1, U2, U3, U4, U5, U6, U7, driving chip U1-U7 is identical, PWM the interface output drive signal P1-P13 and protection signal SD1 of dsp controller, SD2, P1 input driving chip U1 input H, P2 input driving chip U1 input L, P3 input driving chip U2's is defeated Enter and hold H, P4 input driving chips U2 input L, P5 input driving chip U3 input H, P6 input driving chip U3's Input L, P7 input driving chip U7 input H, P8 input driving chip U4 input H, P9 input driving chip U5 Input H, P10 input driving chips U6 input H, P11 input driving chip U4 input L, P12 input driving core Piece U5 input L, P13 input driving chip U6 input L, SD1 inputs driving chip U1 input SD, driving respectively Chip U2 input SD, driving chip U3 input SD, SD2 input driving chip U4 input SD, driving core respectively Piece U5 input SD, driving chip U6 input SD, driving chip U7 input SD；Driving chip U1 output end G1, G2, driving chip U2 output end G1, G2, driving chip U3 output end G1, G2, difference output drive signal S1-S6, Driving chip U4 output end G1, G2 difference output drive signal S8 and S11, driving chip U5 output end G1, G2 difference are defeated Go out drive signal S9 and S12, driving chip U6 output end G1, G2 difference output drive signal S10 and S13, driving chip U7 Output end G1 output drive signals S7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723854.6A CN107404259B (en) | 2017-08-22 | 2017-08-22 | A kind of brushless DC motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723854.6A CN107404259B (en) | 2017-08-22 | 2017-08-22 | A kind of brushless DC motor control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098336A (en) * | 2021-03-31 | 2021-07-09 | 深圳市德宝智能科技有限公司 | Brushless control system applied to pedestrian passageway gate |
| CN117277221A (en) * | 2023-11-21 | 2023-12-22 | 泰兴市康森爱特传动设备科技有限公司 | Control device and control method for permanent magnet synchronous motor |
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| CN103248291A (en) * | 2013-05-30 | 2013-08-14 | 北京航空航天大学 | Position-free sensor control system of high speed brushless direct current motor |
| CN104167926A (en) * | 2014-08-10 | 2014-11-26 | 龚秋声 | AC voltage stabilization power supply for adjusting compensating voltages by means of AC chopper circuit |
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| CN102790568A (en) * | 2012-08-01 | 2012-11-21 | 北京海斯德电机技术有限公司 | Soft start control system for high-speed brushless DC motor |
| CN202918232U (en) * | 2012-08-01 | 2013-05-01 | 北京海斯德电机技术有限公司 | Soft start control system for high-speed brushless direct-current motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098336A (en) * | 2021-03-31 | 2021-07-09 | 深圳市德宝智能科技有限公司 | Brushless control system applied to pedestrian passageway gate |
| CN117277221A (en) * | 2023-11-21 | 2023-12-22 | 泰兴市康森爱特传动设备科技有限公司 | Control device and control method for permanent magnet synchronous motor |
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| CN107404259B (en) | 2019-11-29 |
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