CN208754210U - The control system of permanent magnet synchronous motor - Google Patents
The control system of permanent magnet synchronous motor Download PDFInfo
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- CN208754210U CN208754210U CN201821739252.6U CN201821739252U CN208754210U CN 208754210 U CN208754210 U CN 208754210U CN 201821739252 U CN201821739252 U CN 201821739252U CN 208754210 U CN208754210 U CN 208754210U
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Abstract
The utility model discloses a kind of control system of permanent magnet synchronous motor, including rectifier bridge, inverter bridge, control panel, PWM drive module and detection protection circuit；The detection protection circuit plate includes signal acquisition unit, carries out marking the conditioning circuit changed to the output to the signal acquisition unit; and the protection circuit with the conditioning circuit output connection; the signal acquisition unit includes phase voltage acquisition unit and current acquisition unit; the protection circuit includes or door; the output connection of described or door two input terminals conditioning circuit corresponding with phase voltage acquisition unit and current acquisition unit respectively, described or door output end are connected to the PWM drive module.The utility model directly controls PWM drive module after carrying out signal arrangement using hardware circuit after acquisition, effectively improves the robustness of control, meanwhile, signal is carried out to mark change processing, integrated circuit control is clear.Electric current is unified using signal conditioning circuit, the interface signal level of voltage facilitates the design and normalization application of detection circuit.
Description
Technical field
The utility model belongs to motor control technology field, 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 the control system of permanent magnet synchronous motor is usually by two
Pole 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, it is therefore necessary to it is same to design a kind of permanent magnetism
Walk the protective device of circuit for controlling motor.
There are following disadvantages when the control system of permanent magnet synchronous motor is using single software protection mode:
(1) the control chip of runs software program, which exists, runs the case where flying, crashing, cannot normal work when breaking down
Make, software will be unable to execute protective program, therefore there are some potential safety problemss for single software protection mode；How effectively into
Row protection safe design, which becomes, to be continued to solve the problems, such as.
(2) the main circuit input of electric machine control system, output switch are not turned off when failure, due to being only off inverter
Operation, diode rectifier bridge is uncontrolled, thus rectify output DC voltage always exist, this also can exist safety ask
Topic.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of control system of permanent magnet synchronous motor
System, can effectively improve control security.
The utility model is achieved through 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
Detection protection circuit；The detection protection circuit plate includes signal acquisition unit, to the signal acquisition unit
Output carries out marking the conditioning circuit changed, and the protection circuit with the conditioning circuit output connection, the signal are adopted
Collection unit includes phase voltage acquisition unit and current acquisition unit, and the protection circuit includes or door described or door two
Input terminal respectively conditioning circuit corresponding with phase voltage acquisition unit and current acquisition unit output connection, it is described or door
Output end is connected to the PWM drive module.
In the above-mentioned technical solutions, the conditioning circuit includes arranging acquisition signal for the signal condition of 5V signal
The anode of circuit and operational amplifier, the operational amplifier is defeated through first resistor R1 and the signal conditioning circuit
It connects out, cathode is connected with itself output end, and output end is connected to described or door through the 4th resistance R4.
It in the above-mentioned technical solutions, further include input side D.C. contactor, three pairs of the input side D.C. contactor
In the corresponding input phase for concatenating the rectifier bridge in contact, the output end and input side D.C. contactor of the protection circuit
Control connection.
In the above-mentioned technical solutions, the inverted device of output of the protection circuit connects the base stage of triode, triode
The relay coil of input side D.C. contactor described in collector series connection is followed by 24V, the emitter ground connection of the triode.
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 that the charging resistor that cathode rectifier output end is arranged in, DC transformating power and anti-overflow direct current connect
Tentaculum, wherein the input terminal of the DC transformating power is connected with the output of rectifier bridge, the anti-overflow direct current contact
The relay coil of device is serially connected in the outlet side of DC transformating power, and a pair of the anti-overflow anti-overflow D.C. contactor is often
Contact is opened to be 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.
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
Connect display device.
In the above-mentioned technical solutions, the display device be LCD display device, with the DSP control panel with
RS232 mode communicates, and further includes the storage chip communicated with the DSP control panel, the DSP by isolating chip and
Communication chip is connect with the LCD display device.
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 CAN communication unit communicated with the control panel, the CAN communication
Unit is the CAN chip with isolation.
It the advantages of the utility model and has the beneficial effect that
The utility model directly controls PWM drive module after carrying out signal arrangement using hardware circuit after acquisition, effectively mentions
The robustness of height control, meanwhile, signal is carried out to mark change processing, integrated circuit control is clear.It is united using signal conditioning circuit
One electric current, the interface signal level of voltage facilitate the design and normalization application of detection circuit.
Detailed description of the invention
Fig. 1 is the control system architecture figure of permanent magnet synchronous motor.
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 conditioning circuit structural schematic diagram.
Fig. 7 is protection circuit schematic diagram.
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 make those skilled in the art better understand the scheme of the utility model, combined with specific embodiments below into one
Step illustrates the technical solution of the utility model.
Embodiment one
The control system of the permanent magnet synchronous motor of the utility model include three-phase alternating-current supply 1, rectifier bridge 2, inverter bridge 3,
Control panel 6, PWM drive module 7, the bus capacitor 5 being arranged between two output ends of the rectifier bridge, detection protection circuit
8 and permanent magnet synchronous motor 4；The detection protection circuit plate includes signal acquisition unit, to the signal acquisition
The output of unit carries out marking the conditioning circuit changed, and the protection circuit with the conditioning circuit output connection, described
Signal acquisition unit includes phase voltage acquisition unit and current acquisition unit, and the protection circuit includes or door, it is described or
Door two input terminals respectively conditioning circuit corresponding with phase voltage acquisition unit and current acquisition unit output connection, it is described
Or the output end of door is connected to the PWM drive module.
Wherein, the conditioning circuit includes arranging acquisition signal for the signal conditioning circuit of 5V signal, Yi Jiyun
Amplifier 26 is calculated, the anode of the operational amplifier is exported through first resistor R1 and the signal conditioning circuit to be connected, and is born
Pole is connected with itself output end, and output end is connected to described or door 27 through the 4th resistance R4.
Its specific connection relationship is as follows:
The signal Input of signal conditioning circuit output is connect with resistance R1, R2, and the other end of resistance R2 is connect with GND, electricity
The other end of resistance R1 is connect with the anode of resistance R3, capacitor C1 and operational amplifier 26.Resistance R3, capacitor C1 the other end with
GND connection.The negative terminal of operational amplifier 26 is connect with itself output end, the output end and resistance R4, capacitor of operational amplifier 26
The anode connection of C2, the cathode of diode D7, diode D8.The other end of capacitor C2, the anode of diode D7 are connect with GND,
The cathode of diode D8 is connect with 3.3V.Diode D7 and D8 are constituted there are two being arranged in the output end of the operational amplifier
Amplitude limiter circuit, when be greater than 3.3+ diode conduction voltage drop when top diode D8 conducting, diode D7 is led when less than 0
Following diode current flow, can be effectively controlled the voltage entered or door when logical pressure drop.
Due to first passing through signal conditioning circuit, the signals such as electric current, DC voltage are arranged into the signal for 5V, therefore detect electricity
Road is acquired using unified form, and the electric machine phase current and DC voltage of acquisition have carried out marking change, acquisition signal warp
It is directly entered after filtering or door.Specifically, the output electric current Iout and resistance R5 of the corresponding conditioning circuit of current acquisition unit connect
It connects, the other end of resistance R5 is connect with 1 end of capacitor C3 or door 27.The output of the corresponding conditioning circuit of phase voltage acquisition unit
Electric current Vdout is connect with resistance R6, and the other end of resistance R6 is connect with 2 ends of capacitor C4 or door 27.Or the output end of door 27 with
The anode and PWM drive module 7 of light emitting diode D9 connects, and the cathode of light emitting diode D9 is connected to ground
The utility model directly controls PWM drive module after carrying out signal arrangement using hardware circuit after acquisition, effectively mentions
The robustness of height control, meanwhile, signal is carried out to mark change processing, integrated circuit control is clear.
Embodiment two
For the input that rectifier bridge side is effectively truncated, the control system of the utility model further includes input side D.C. contactor,
In the corresponding input phase for concatenating the rectifier bridge in three pairs of contacts 12 of the input side D.C. contactor, the protection
The output end of circuit is connect with input side D.C. contactor 30.That is, the inverted device 28 of output of the protection circuit connects three poles
The relay coil of the base stage of pipe T1, the input side D.C. contactor is serially connected on the collector of triode and another termination
24V, the emitter ground connection of the triode.Wherein input side contactor 12 is directly controlled by detection protection circuit 8, and detection is protected
Protection circuit 8 judges whether overcurrent, over-voltage, if breaking down, protection signal is input in PWM drive module 7, is protected by output
Shield signal directly blocks the output of PWM drive module 7, and is alarmed by light emitting diode D9, then drags down level by phase inverter
It is enabled to make relay coil, to disconnect input side contactor 12, completes hardware protection function.DSP control panel 6 receives guarantor simultaneously
After protecting signal, pwm signal is blocked, shuts down procedure operation, completes system software protection.The function of fuse 17 is then in order to prevent
DC bus short circuit, protects three-phase inverter.Braking resistor, braking contactor is replaced to be protected using fuse in main circuit
Shield, it is also to reduce control that direct fusing mechanism, which carries out protection, improves control stability.
Specific such as to scheme, U, V, W of three-phase alternating-current supply 1 are connect with 1,3,5 contacts of input contactor 12 respectively, and input connects
2,4,6 contacts of tentaculum 12 are connect with 1,2,3 ends of diode rectifier bridge 2 respectively, 5 ends of diode rectifier bridge 2 and bus electricity
Hold the 2 ends connection of the 5, cathode of DC transformating power 16 and three phase inverter bridge 3.One end of fuse 17 connects, fuse 17
The other end connect with 1 end of three phase inverter bridge 3.3,4,5 ends of three phase inverter bridge 3 A, B, C with permanent magnet synchronous motor 4 respectively
It is connected.
Or the output end of door 27 is connected with the input terminal of phase inverter 28, the output end of phase inverter 28 is connect with resistance R7.
The other end of resistance R7 is connect with the base stage of triode T1, and the emitter of triode T1 is connect with AGND.The current collection of triode T1
Pole is connect with the anode of sustained diode 10, relay coil Ts, and cathode, the relay coil Ts of sustained diode 10 are another
End is connect with+24V.
When the controlled stopping of PWM drive module, after controlling the inverted device of signal input side D.C. contactor coil is led
Logical, the electric current for completing front end disconnects, and realizes whole control.
Embodiment three
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 16 and anti-mistake
Flow D.C. contactor, wherein the input terminal of the DC transformating power is connected with the output of rectifier bridge, the anti-overflow
The relay coil of D.C. 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 13 be arranged in parallel with the charging resistor 14.Wherein, the output of the DC transformating power is 24V
Direct current, the anti-overflow D.C. contactor are 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 the rectifier bridge output of the utility model is the input voltage of DC transformating power, directly
Stream converting power source is equivalent to voltage dropping power supply, carries out charging initial stage to bus capacitor, the input terminal voltage ratio of DC transformating power
Smaller, 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 is exported straight
The constantly decline of galvanic electricity pressure, when being lower than 480V, DC transformating power can not export 24V direct current, and anti-overflow D.C. contactor is just
It disconnects, charging resistor is connected in series in circuit again, and the electric discharge safety of bus capacitor is effectively ensured, and whole process is not necessarily to external signal
Control, it is simple and reliable, it depends entirely on whether bus capacitor reaches relevant voltage value, controls and stablize height, it is electric with bus is connected in parallel on
Hold the DC voltage source control contactor of two sides instead of original dsp control signal, as long as diode rectifier output is straight
Galvanic electricity pressure reaches certain value, can automatic pick, charging resistor is shorted, without DSP control.
Example IV
The utility model further include input termination alternating current DC power supply, the DC power supply include with
The direct current redundant module 18 of U, V phase in three-phase input power supply as input, output end with the direct current redundant module 18
And the multiple DC power suppliers connect, the DC power supplier are respectively the control panel, detection protection circuit and electricity
Press detection circuit and the power supply of PWM drive module.Using Redundancy power supply, enhance the redundant ability of system control electricity, guarantees straight
Galvanic electricity stablizes supply, reduces system phase shortage and causes 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 the straight of bright latitude power supply can be selected in direct current redundant module 18
Redundancy mould DR-RDN20 is flowed, which uses Redundancy Design, and using U, V phase in three-phase input power supply as input, U, V are mutual
To be spare, generation+24V direct current can guarantee that control electricity is normal to greatest extent.Pass through the DC power supply mould of Jin Shengyang company again
Block (model IB2405LS-1W, WRA2415S-3W and K7803-500R2) respectively by 24V be converted to for+5V, ± 15V with
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 DVC3
Anode, DVR1 one end connect with the Vout of the first DC Module 18, the cathode of capacitor DVC3 and the other end of DVR1 and
The 0V connection of one 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.Capacitor DVC8, VC9 anode connect with the 0V of the second DC Module 19, -15V signal, capacitor DVC8, DVC9 bear
Pole 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, electricity
The anode for holding DVC12 is connect with the Vout of third DC Module 20, and the cathode of capacitor DVC12 is connect with GND.
Embodiment five
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, is further mentioned
High anti-interference, storage unit using AT2404 chip storage electric machine control system major parameter.Increase isolating chip, mentions
Height 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 be connected, VCCA, GNDA of isolating chip 23 are connect with+3.3V and GND respectively, the OUTB of isolating chip 23,
INB is connected with the end SCITX, SCIRX of communication chip 24 respectively, VCCB, GNDB of isolating chip 23 respectively with+3.3V and
DGND connection.The end Tx+, Tx-, Rx+, Rx- of communication chip 24 is connected with 2,3,4,6 ends of LCD display input 10 respectively.
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.
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
Sequentially.
Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model
In the case where the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc.
The protection scope of the utility model is each fallen with replacement.
Claims (10)
1. a kind of control system of permanent magnet synchronous motor, it is characterised in that: including rectifier bridge, inverter bridge, control panel, PWM driving
Module and detection protection circuit；The detection protection circuit includes signal acquisition unit, to the signal acquisition
The output of unit carries out marking the conditioning circuit changed, and the protection circuit with the conditioning circuit output connection, described
Signal acquisition unit includes phase voltage acquisition unit and current acquisition unit, and the protection circuit includes or door, it is described or
Door two input terminals respectively conditioning circuit corresponding with phase voltage acquisition unit and current acquisition unit output connection, it is described
Or the output end of door is connected to the PWM drive module.
2. the control system of permanent magnet synchronous motor as described in claim 1, it is characterised in that: the conditioning circuit include to
Acquisition signal is arranged into signal conditioning circuit and operational amplifier for 5V signal, the anode warp of the operational amplifier
First resistor R1 and the signal conditioning circuit, which export, to be connected, and cathode is connected with itself output end, and output end is through the 4th resistance
R4 is connected to described or door.
3. the control system of permanent magnet synchronous motor as described in claim 1, it is characterised in that: further include the contact of input side direct current
Device, three pairs of contacts of the input side D.C. contactor correspond in the input phase for concatenating the rectifier bridge, the guarantor
Output end and input side the D.C. contactor control of protection circuit connect.
4. the control system of permanent magnet synchronous motor as claimed in claim 3, it is characterised in that: the output of the protection circuit
Inverted device connects the base stage of triode, after the relay coil of input side D.C. contactor described in the collector series connection of triode
Connect 24V, the emitter ground connection of the triode.
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: further include direct current supply
Power supply, the DC power supply includes the direct current redundant module with U, V phase in three-phase input power supply as input, with institute
The output end for the direct current redundant module stated and the multiple DC power suppliers connect, the DC power supplier are respectively described
Control panel, detection protection circuit and voltage detecting circuit and the power supply of PWM drive module.
8. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: the control panel is
DSP control panel further includes filling with the DSP control panel communication connection display device, the display device for LCD display
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.
9. 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.
10. a kind of control system of permanent magnet synchronous motor according to claim 1, it is characterised in that: further include with it is described
Control panel communication CAN communication unit, the CAN communication unit be band be isolated CAN chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821739252.6U CN208754210U (en) | 2018-10-25 | 2018-10-25 | The control system of permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821739252.6U CN208754210U (en) | 2018-10-25 | 2018-10-25 | The control system of permanent magnet synchronous motor |
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| Publication Number | Publication Date |
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| CN208754210U true CN208754210U (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039170A (en) * | 2018-10-25 | 2018-12-18 | 核工业理化工程研究院 | The control system of permanent magnet synchronous motor |
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2018
- 2018-10-25 CN CN201821739252.6U patent/CN208754210U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039170A (en) * | 2018-10-25 | 2018-12-18 | 核工业理化工程研究院 | The control system of permanent magnet synchronous motor |
| CN109039170B (en) * | 2018-10-25 | 2024-03-08 | 核工业理化工程研究院 | Control system of permanent magnet synchronous motor |
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