CN109217742A - The control system of permanent magnet synchronous motor - Google Patents
The control system of permanent magnet synchronous motor Download PDFInfo
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- CN109217742A CN109217742A CN201811253623.4A CN201811253623A CN109217742A CN 109217742 A CN109217742 A CN 109217742A CN 201811253623 A CN201811253623 A CN 201811253623A CN 109217742 A CN109217742 A CN 109217742A
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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
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
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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
- H02H7/0805—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 for synchronous motors
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Abstract
The invention discloses a kind of control systems of permanent magnet synchronous motor, it is characterized in that, including rectifier bridge, inverter bridge, control panel, PWM drive module, and major loop protection mechanism, the major loop protection mechanism includes input contactor, output contactor, braking contactor and braking resistor and detection protection circuit, in the corresponding access input three-phase electricity of three pairs of normally-closed contacts of the input contactor and output contactor and output three-phase electricity, a pair of of normally opened contact of the braking resistor and braking contactor is serially connected between the input terminal of the inverter bridge, the output of the detection protection circuit is electrically connected with the PWM drive module and controllably connect with the input contactor and output contactor, the braking contactor is controllably connect with the control panel.The present invention realizes the first time reliable and stable cutting of input and output, and carry out dredging protection to inverter by the cooperation of three different contactors.
Description
Technical field
The invention belongs to motor control technology fields, and in particular to a kind of control system of permanent magnet synchronous motor.
Background technique
Permanent magnet synchronous motor has many advantages, such as that energy density is high, the service life is long, pollution-free, easy to maintain, in Industry Control, energy
The fields such as source traffic, military equipment have been widely used.The main circuit of control system for permanent-magnet synchronous motor is usually by two poles
Pipe rectifier and inverter are constituted, when breaking down or when abnormal conditions, generally pass through software blocked PWM (pulsewidth modulation) letter
Number, control PWM module closes driving signal, and the mode for stopping invertor operation being protected, this kind of mode is suitable for most of
Fault condition, but the serious still normal operation of control circuit of single software protection mode, once control circuit fails,
Just it can not work normally, while software protection mode lacks the protection for main circuit device.
Meanwhile there is also, cannot effectively be truncated to output and input and simultaneously when there are failures for existing magneto
To inverter bridge progress discharge prevention or existing protection mechanism, there are security risks.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of control system of permanent magnet synchronous motor, energy
Effectively improve the safety integrally controlled.
The present invention is achieved by the following technical solutions:
A kind of control system of permanent magnet synchronous motor, including rectifier bridge, inverter bridge, control panel, PWM drive module and
Major loop protection mechanism, the major loop protection mechanism include input contactor, output contactor, braking contactor and system
Dynamic resistance and detection protection circuit, the corresponding access of three pairs of normally-closed contacts of the input contactor and output contactor are defeated
Enter in three-phase electricity and output three-phase electricity, a pair of of normally opened contact of the braking resistor and braking contactor is serially connected in described
Between the input terminal of inverter bridge, the output of the described detection protection circuit be electrically connected with the PWM drive module and with it is described
Input contactor and output contactor controllably connect, the braking contactor is controllably connect with the control panel.
In the above-mentioned technical solutions, it is connect respectively through the input after the inverted device of output of the detection protection circuit
The relay coil of tentaculum and output contactor is followed by 24V.
It in the above-mentioned technical solutions, further include the alarm diode connected with the output of the detection protection circuit, institute
The other end ground connection for the alarm diode stated.
In the above-mentioned technical solutions, fuse is provided on the electrode input end of the inverter bridge.
It in the above-mentioned technical solutions, further include the pre-charge circuit of overcurrent when preventing from charging to bus capacitor, it is described
Pre-charge circuit include the charging resistor that cathode rectifier output end is set, DC transformating power and anti-overflow direct current
Contactor, wherein the input terminal of the DC transformating power is connected with the output of rectifier bridge, the anti-overflow direct current
The relay coil of contactor is serially connected in the outlet side of DC transformating power, the anti-overflow anti-overflow D.C. contactor
A pair of of normally opened contact is arranged in parallel with the charging resistor.
In the above-mentioned technical solutions, the output of the DC transformating power is 24V direct current, the anti-overflow direct current
Contactor is 24V D.C. contactor.
In the above-mentioned technical solutions, the detection protection circuit includes the phase current signal acquisition unit of motor, direct current
Voltage signal acquisition unit and or door, described or door output be the output of the described detection protection circuit.
In the above-mentioned technical solutions, the phase current signal acquisition unit includes to sense phase current signal and output
In -5V~+5V current sensor and the first operational amplifier, the output of the current sensor and+5V voltage point
Not after resistance and it is connected to the positive input terminal of first operational amplifier, the negative input of first operational amplifier
End is connected with output end, first operational amplifier output terminal filter be followed by described in or door.
In the above-mentioned technical solutions, the d. c. voltage signal acquisition unit includes second operational amplifier and third fortune
Amplifier is calculated, the positive input terminal and negative input end of the second operational amplifier directly connect direct current after bleeder circuit respectively
The anode of the positive and negative terminal of bus, the second operational amplifier is grounded through filter capacitor C3 and filter resistance R15 in parallel,
The negative input end of the second operational amplifier is followed by its output end through in parallel capacitor C4 and resistance R16, and described second
The output of operational amplifier accesses the positive input terminal of third operational amplifier after dividing, the third operational amplifier
Negative input end is connect with its output end, and the output of the third operational amplifier accesses described or door after filtering.
It in the above-mentioned technical solutions, further include DC power supply, the DC power supply includes with three-phase input
U, V phase in power supply and the output end of the direct current redundant module and connects multiple straight as the direct current redundant module of input
Galvanic electricity source module, the DC power supplier be respectively the control panel, detection protection circuit and voltage detecting circuit and
The power supply of PWM drive module.
In the above-mentioned technical solutions, the control panel is DSP control panel, further includes communicating with the DSP control panel
Display device is connected, the display device is LCD display device, it is communicated in a manner of RS232 with the DSP control panel,
It further include the storage chip communicated with the DSP control panel, the DSP passes through isolating chip and communication chip and institute
The LCD display device connection stated.
It in the above-mentioned technical solutions, further include the CAN communication unit communicated with the control panel, the CAN communication
Unit is the CAN chip with isolation.
The advantages and benefits of the present invention are:
The present invention realizes the first time reliable and stable cutting of input and output by the cooperation of three different contactors,
And inverter is carried out to dredge protection, it is protected moreover, carrying out further acting to it using the braking resistor of DSP control conducting
Shield, makes full use of the time difference, guarantees the safety of final integral device control.
Detailed description of the invention
Fig. 1 is control system for permanent-magnet synchronous motor structure chart.
Fig. 2 is direct current supply module input side structural schematic diagram.
Fig. 3 is the power pack structural schematic diagram of direct current supply module.
Fig. 4 is that LCD shows storage organization schematic diagram.
Fig. 5 is isolated can communication unit structural schematic diagram.
Fig. 6 is isolated can communication unit structural schematic diagram.
Fig. 7 is the conditioning circuit partial schematic diagram of detection protection circuit.
Fig. 8 is the control section schematic diagram of detection protection circuit.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, combined with specific embodiments below furtherly
Bright technical solution of the present invention.
Embodiment one
A kind of control system of permanent magnet synchronous motor 4 of the invention, including rectifier bridge 2, inverter bridge 3, control panel 6, PWM
Drive module 7 and major loop protection mechanism, the major loop protection mechanism include input contactor 11, output contactor
18 and braking contactor 16 and braking resistor 17 and detection protection circuit 7, the input contactor 11 and output contact
In the corresponding access input three-phase electricity of three pairs of normally-closed contacts of device 18 and output three-phase electricity, the braking resistor 17 and brake contact
A pair of of normally opened contact of device 16 is serially connected between two input terminals of the inverter bridge 3, and the defeated of circuit 7 is protected in the detection
It is electrically connected and is controllably connect with the coil of the input contactor and output contactor, institute with the PWM drive module out
The coil for the braking contactor stated controllably is connect with the control panel.The PWM drive module and the control panel are logical
News connection.PWM drive module selects the SKHI22AH4R module of Sai meter Kong company, the module integrated driving and protection circuit function
Can, peripheral circuit is simple, is not necessarily to optocoupler or transformer isolation, the pwm signal of DSP directly can be connected to power module, convenient
Using.
It wherein, is the fast and reliable control of realization, respectively through institute after the inverted device 20 of output of the detection protection circuit
The relay coil of the input contactor and output contactor stated is followed by 24V.That is, input contactor and output contactor after
It is serially connected between phase inverter and 24V after electric apparatus coil Ts2 and Ts3 are in parallel, when the output end of phase inverter is low-voltage, then coil is logical
Electric contactor movement.Meanwhile the relay coil Ts2 and Ts3 for inputting contactor and output contactor are also parallel with afterflow respectively
Diode D8 and D9.
It further, further include the alarm diode D7 connected with the output of the detection protection circuit, the report
The other end ground connection of alert diode.Fuse 16 is provided on the electrode input end of the inverter bridge simultaneously.
Control System of AC Permanent Magnet Synchronous and the specific connection type of primary circuit protection device are as shown in the figure:
U, V, W of three-phase alternating-current supply 1 are connect with 1,3,5 contacts of input contactor 11 respectively, input contactor 11
2,4,6 contacts are connect with 1,2,3 ends of diode rectifier bridge 2 respectively, 4 ends of diode rectifier bridge 2 with charging resistor 14,
The connection of one end of D.C. contactor 13 and relay coil 12,5 ends of diode rectifier bridge 2 and bus capacitor 5 and direct current become
Change the 2 ends connection of the cathode of power supply 15, the lower end of braking resistor 17 and three phase inverter bridge 3.Charging resistor 14, direct current contact
One end company of the anode of device 13, the other end of relay coil 12 and bus capacitor 5 and DC transformating power 15, fuse 19
Connect, the other end of fuse 19 is connect with 1 end of braking contactor 16 and three phase inverter bridge 3, braking contactor 16 it is another
End is connect with the upper end of braking resistor 17.3,4,5 ends of three phase inverter bridge 3 are connect with 1,3,5 contacts of output contactor 18,
2,4,6 contacts of output contactor 18 are connected with A, B, C of permanent magnet synchronous motor 4 respectively.
If breaking down, into PWM drive module 7, directly block PWM believes detection protection 10 output protection signal of circuit
Number, realize hardware protection function, while the inverted device of signal being protected to drag down, control input contactor 11 and output contactor 18
It disconnects, contact becomes normally opened from normally closed, and by alarm diode D7 luminous alarm.After DSP receives protection signal, control system
Dynamic contactor 16 is then closed, and contact becomes normally closed from normally opened, and fuse 19 effectively prevent DC bus short-circuit, further
Protect system main circuit.By the cooperation of three different contactors, the first time for realizing input and output reliable and stable is cut
It is disconnected, moreover, carrying out further action protection to it using the braking resistor of DSP control conducting, the time difference is made full use of, is protected
Demonstrate,prove the safety of final integral device control.
Embodiment two
It on the basis of the above embodiments, further include the pre-charge circuit of overcurrent when preventing from charging to bus capacitor,
The pre-charge circuit includes the charging resistor 14 that cathode rectifier output end is arranged in, DC transformating power 15 and prevents
Overcurrent D.C. contactor, wherein the input terminal of the DC transformating power is connected with the output of rectifier bridge, and described is anti-
The relay coil of overcurrent D.C. contactor is serially connected in the outlet side of DC transformating power, the anti-overflow anti-overflow direct current
A pair of of normally opened contact 13 of contactor is arranged in parallel with the charging resistor.Preferably, the DC transformating power is defeated
It is out 24V direct current, the anti-overflow D.C. contactor is 24V D.C. contactor.
Wherein, the output of the DC transformating power is 24V direct current, and the anti-overflow D.C. contactor is 24V
Anti-overflow D.C. contactor.The DC voltage of rectifier bridge output of the invention is the input voltage of DC transformating power, and direct current becomes
It changes power supply and is equivalent to voltage dropping power supply, carried out charging initial stage to bus capacitor, the input terminal voltage of DC transformating power compares
Small, when bus capacitor tends to saturation, the input terminal voltage of DC transformating power is incrementally increased, only when rectifier bridge output
When DC voltage reaches 480V or so, the output voltage of DC transformating power can be only achieved 24V, and only 24V voltage could allow
Anti-overflow D.C. contactor is attracted, and charging resistor is shorted.When three-phase is electrically disconnected or rectifier bridge failure, rectifier bridge output
DC voltage constantly declines, and when being lower than 480V, DC transformating power can not export 24V direct current, anti-overflow D.C. contactor
Just it disconnects, charging resistor is connected in series in circuit again, the electric discharge safety of bus capacitor is effectively ensured, whole process is without outside
Signal control, it is simple and reliable, depend entirely on bus capacitor and whether reach relevant voltage value, control stablize it is high, with being connected in parallel on mother
The DC voltage source control contactor of line capacitance two sides is instead of original dsp control signal, as long as diode rectifier exports
DC voltage reach certain value, can automatic pick, charging resistor is shorted, without DSP control.
Embodiment three
On the basis of the above embodiments, the detection protection circuit includes the phase current signal acquisition unit of motor,
D. c. voltage signal acquisition unit and or door, described or door output be the output of the described detection protection circuit.
Specifically, the phase current signal acquisition unit includes to sense phase current signal and output in -5V~+5V
Current sensor and the first operational amplifier 21, the output of the current sensor and+5V voltage are respectively through resistance
R2 and resistance R1 and the positive input terminal for being connected to first operational amplifier 21 after connecing through resistance R4 again, described first
The negative input end of operational amplifier is connected with output end, the concatenated resistance R5 of 21 output end of the first operational amplifier with
And the capacitor C2 filtering of ground connection is followed by described or door.Meanwhile first operational amplifier electrode input end also through electricity in parallel
Hold C1 and resistance R3 ground connection.
The current sensor that current acquisition uses converts electrical current into positive and negative 5V signal, since DSP can not receive negative signal,
So superposition+5V signal is changed into 0-3V signal through operational amplifier again, since the negative terminal of current sensor is also AGND,
So not repeating to draw on circuit.
The d. c. voltage signal acquisition unit includes second operational amplifier 27 and third operational amplifier 28, described
Second operational amplifier positive input terminal and negative input end respectively through divider resistance, the resistance R5, the resistance that are such as sequentially connected in series
The bleeder circuit that R6, resistance R7, resistance R8 and resistance R9 and resistance R15 are constituted, or be sequentially connected in series resistance R10, resistance R11,
Resistance R12, resistance R13 and resistance R14, and the cathode Vdc- and anode Vdc+ of voltage sensor are met, second operation is put
The anode of big device is grounded through filter capacitor C3 in parallel, and the negative input end of the second operational amplifier is through capacitor in parallel
C4 and resistance R16 is followed by its output end, and the output of the second operational amplifier accesses third operational amplifier after dividing
Positive input terminal, the negative input end of the third operational amplifier connect with its output end, what the third operation was abandoned
Export described in accessing after grounded capacitor C5 is filtered or door.Wherein, the partial pressure is serially connected in second operational amplifier
The resistance R17 of output and the resistance R18 structure that is grounded of the electrode input end other end of one end and the third operational amplifier
At.Wherein, Vdc+ and Vdc- is the positive and negative terminal of DC bus, does not use any voltage sensor, but uses divider resistance
The DC bus-bar voltage signal of 540V or so is become to the direct current signal of 24V.
Its specific connection relationship is as follows:
Electric machine phase current signal first becomes -5V~+5V signal Iin through current sensor.Iin is connect with resistance R2, resistance
The R2 other end is connect with resistance R4.+ 5V is connect with resistance R1, and the resistance R1 other end is connect with resistance R2, R4.Resistance R4 is another
End is connect with the anode of resistance R3, capacitor C1 and the first operational amplifier 21, the other end and AGND of resistance R3, capacitor C1
Connection.The output end of first operational amplifier 21 is connect with itself negative terminal and resistance R5, the resistance R5 other end and capacitor C2,
Output port Iout connection, the capacitor C2 other end are connect with AGND.
Vdc+ signal is connect with resistance R5, and the resistance R5 other end is connect with resistance 6, and the resistance R6 other end and resistance R7 connect
It connects, the R7 other end is connect with resistance R8, and the R8 other end is connect with resistance R9, the R9 other end and resistance R16, capacitor C4 and the
The negative terminal of two operational amplifiers 27 connects.Vdc- signal is connect with resistance R10, and the resistance R10 other end is connect with resistance R11, electricity
The resistance R11 other end is connect with resistance R12, and the R12 other end is connect with resistance R13, and the R13 other end is connect with resistance R14, and R14 is another
One end is connect with the anode of resistance R15, capacitor C3 and second operational amplifier 27.Resistance R15, capacitor C3 the other end with
AGND connection.The output end of second operational amplifier 27 is connect with resistance R16, the other end of capacitor C4 and R17, resistance R17
It is connect with the anode of resistance R18 and third operational amplifier 28, the resistance R18 other end is connect with AGND.Third operation amplifier
The output end of device 28 connect with port Vout, capacitor C5 connection.The other end of capacitor C5 is connect with AGND.
The electric machine phase current and DC voltage of acquisition have been standardized, acquisition signal be directly entered after filtering or
Door.Electric current Iout is connect with resistance R20, and the other end of resistance R20 is connect with 1 end of capacitor C7 or door 29.Electric current Vdout with
The other end of resistance R19 connection, resistance R19 is connect with 2 ends of capacitor C6 or door 29.Or the output end and phase inverter of door 29
30 input terminal, the anode of light emitting diode D9 and PWM drive module 7 connect,
Embodiment three
The invention also includes the DC power supplies of input termination alternating current, and the DC power supply includes with three-phase
U, V phase in input power and the output end of the direct current redundant module 18 and connects as the direct current redundant module 18 of input
Multiple DC power suppliers, the DC power supplier is respectively the control panel, detection protection circuit and voltage inspection
Slowdown monitoring circuit and the power supply of PWM drive module.Using Redundancy power supply, enhances the redundant ability of system control electricity, guarantee direct current
Stablize supply, reduce system phase shortage cause to control electrically disconnected probability.
Specifically as shown, DC power supply 9 is that DSP control panel 6 and LCD display input 10 provide power supply, wherein directly
Galvanic electricity source 9 provides 24V direct current using direct current redundant module first, and wherein bright latitude power supply can be selected in direct current redundant module 18
Direct current redundancy mould DR-RDN20, which uses Redundancy Design, using U, V phase in three-phase input power supply as input, U, V
Phase mutual backup, generation+24V direct current can guarantee that control electricity is normal to greatest extent.Pass through the direct current of Jin Shengyang company again
Power module (model IB2405LS-1W, WRA2415S-3W and K7803-500R2) respectively by 24V be converted to for+5V,
± 15V and+3.3V, specific connection type are as follows:
+ 24 signals of direct current redundant module 18 respectively with the anode of capacitor DVC1, DVC2 and the first DC Module 18
Vin is connected, and the cathode of capacitor DVC1, DVC2 are connected with the GND of GND, the first DC Module 18 ,+5V signal, capacitor
The anode of DVC3, one end of DVR1 are connect with the Vout of the first DC Module 18, the cathode of capacitor DVC3 and the other end of DVR1
It is connect with the 0V of the first DC Module 18.
+ 24 signals of direct current redundant module 18 respectively with the anode of capacitor DVC4, DVC5 and the second DC Module 19
Vin is connected, and the cathode of capacitor DVC4, DVC5 are connected with the GND of GND, the second DC Module 19 ,+15V signal, capacitor
The anode of DVC6, DVC7 are connect with the V+ of the second DC Module 19, the cathode of capacitor DVC6, DVC7 and the second DC Module 19
0V connection.The anode of capacitor DVC8, VC9 are connect with the 0V of the second DC Module 19, -15V signal, capacitor DVC8, DVC9
Cathode is connect with the V- of DC Module 19.
+ 24 signals of direct current redundant module 18 respectively with the anode of capacitor DVC10, DVC11 and third DC Module 20
Vin be connected, the cathode of capacitor DVC10, DVC11 are connected with the GND of GND, third DC Module 20 ,+3.3V signal,
The anode of capacitor DVC12 is connect with the Vout of third DC Module 20, and the cathode of capacitor DVC12 is connect with GND.
Example IV
The control panel is DSP control panel, further includes and the DSP control panel communication connection display device.Specifically
Ground, the display device are LCD display device, are communicated in a manner of RS232 with the DSP control panel, further include and institute
The storage chip for the DSP control panel communication stated, the DSP are connect by communication chip with the LCD display device.
It wherein, further include the storage chip communicated with the DSP control panel, the DSP passes through communication chip and institute
The LCD display device connection stated, while to prevent from interfering, signal is isolated using IS07221 isolating chip, further
Anti-interference is improved, storage unit stores the major parameter of electric machine control system using AT2404 chip.Increase isolated core
Piece improves communication anti-interference ability and stability.
Specific connection is as follows:
The end A0, A1, A2, VSS and WP of storage chip 22 is connect with GND, and the end VCC is connect with+5V, the end SCL, SDA point
It is not connected with GPIO33, GPIO32 of DSP control panel 6.GPIO14, GPIO13 of DSP control panel 6 respectively with isolating chip
23 INA, OUTA is connected, and VCCA, GNDA of isolating chip 23 are connect with+3.3V and GND respectively, isolating chip 23
OUTB, INB are connected with the end SCITX, SCIRX of communication chip 24 respectively, VCCB, GNDB of isolating chip 23 respectively with+
3.3V is connected with DGND.The end Tx+, Tx-, Rx+, Rx- of communication chip 24 inputs 10 2,3,4,6 end phases with LCD display respectively
Connection.
Described simultaneously further includes the CAN communication unit communicated with the control panel, and the CAN communication unit is band
The CAN chip of isolation.CAN communication unit uses the CAN chip (model ISO1050) with isolation to be communicated, and not only improves
Anti-interference, and additional other isolating chips are not necessarily to, connection type is as follows:
CAN communication terminal is connect with CANH, CANL of CAN communication chip 25 (model ISO1050) respectively, CAN communication
VCCB, GNDB of chip 25 are connect with+5V power supply, DGND respectively.VCCA, GNDA of CAN communication chip 25 respectively with+3.3V,
GND connection.TX, RX of CAN communication chip 25 are connect with GPIO31, GPIO30 of DSP control panel 6 respectively.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in explanatory diagram.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if figure
In device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature
"upper".Therefore, exemplary term "lower" may include both upper and lower orientation.Device can be positioned in other ways (rotation 90
Degree is located at other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Person's sequence.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (11)
1. a kind of control system of permanent magnet synchronous motor, which is characterized in that including rectifier bridge, inverter bridge, control panel, PWM driving
Module and major loop protection mechanism, the major loop protection mechanism connect including input contactor, output contactor, braking
Three pairs of normally-closed contacts of tentaculum and braking resistor and detection protection circuit, the input contactor and output contactor are corresponding
In access input three-phase electricity and output three-phase electricity, a pair of of normally opened contact of the braking resistor and braking contactor is serially connected in institute
Between the input terminal for the inverter bridge stated, the output of the described detection protection circuit be electrically connected with the PWM drive module and with
The input contactor and output contactor controllably connect, and the braking contactor is controllably connect with the control panel.
2. the control system of permanent magnet synchronous motor as described in claim 1, it is characterised in that: the detection protection circuit
It exports the relay coil after inverted device respectively through the input contactor and output contactor and is followed by 24V.
3. the control system of permanent magnet synchronous motor as claimed in claim 2, it is characterised in that: further include being protected with the detection
The alarm diode of the output connection of protection circuit, the other end ground connection of the alarm diode.
4. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: the inverter bridge
Fuse is provided on electrode input end.
5. the control system of permanent magnet synchronous motor as described in claim 1, it is characterised in that: further include preventing to bus capacitor
The pre-charge circuit of overcurrent when charging, the pre-charge circuit include the charging electricity that cathode rectifier output end is arranged in
Resistance, DC transformating power and anti-overflow D.C. contactor, wherein the input terminal of the DC transformating power and rectifier bridge
Output is connected, and the relay coil of the anti-overflow D.C. contactor is serially connected in the outlet side of DC transformating power, described
A pair of of normally opened contact of anti-overflow anti-overflow D.C. contactor be arranged in parallel with the charging resistor.
6. a kind of control system of permanent magnet synchronous motor according to claim 5, it is characterised in that: the DC converting
The output of power supply is 24V direct current, and the anti-overflow D.C. contactor is 24V D.C. contactor.
7. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: the detection protection
Circuit includes the phase current signal acquisition unit of motor, d. c. voltage signal acquisition unit and or door, it is described or door defeated
It is out the output of the detection protection circuit.
8. a kind of control system of permanent magnet synchronous motor according to claim 7, it is characterised in that: the phase current letter
Number acquisition unit includes to sense phase current signal and output in -5V~+5V current sensor and the first operation amplifier
The output of device, the current sensor after resistance and is connected to first operational amplifier just respectively with+5V voltage
The negative input end of input terminal, first operational amplifier is connected with output end, first operational amplifier output terminal
Filter described in being followed by or door.
9. a kind of control system of permanent magnet synchronous motor according to claim 7, it is characterised in that: the DC voltage
Signal acquisition unit includes second operational amplifier and third operational amplifier, the positive input terminal of the second operational amplifier
Directly connect the positive and negative terminal of DC bus, the anode warp of the second operational amplifier after bleeder circuit respectively with negative input end
Filter capacitor C3 in parallel and filter resistance R15 ground connection, the negative input end of the second operational amplifier is through capacitor in parallel
C4 and resistance R16 is followed by its output end, and the output of the second operational amplifier accesses third operational amplifier after dividing
Positive input terminal, the negative input end of the third operational amplifier connect with its output end, the third operational amplifier
Output described or door is accessed after filtering.
10. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: further include that direct current supplies
Power supply, the DC power supply include the direct current redundant module with U, V phase in three-phase input power supply as input, with
The output end of the direct current redundant module and the multiple DC power suppliers connect, the DC power supplier are respectively described
Control panel, detection protection circuit and voltage detecting circuit and PWM drive module power supply.
11. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: the control panel
It further include being filled with the DSP control panel communication connection display device, the display device for LCD display for DSP control panel
It sets, is communicated in a manner of RS232 with the DSP control panel, further include the storage chip communicated with the DSP control panel,
The DSP is connect by isolating chip and communication chip with the LCD display device.
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| CN109217742B CN109217742B (en) | 2024-02-09 |
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|---|---|---|---|---|
| WO2021114418A1 (en) * | 2019-12-13 | 2021-06-17 | 浙江禾川科技股份有限公司 | Electric motor drive circuit |
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