CN208836035U - The control system of permanent magnet synchronous motor with position sensor - Google Patents
The control system of permanent magnet synchronous motor with position sensor Download PDFInfo
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- CN208836035U CN208836035U CN201821737983.7U CN201821737983U CN208836035U CN 208836035 U CN208836035 U CN 208836035U CN 201821737983 U CN201821737983 U CN 201821737983U CN 208836035 U CN208836035 U CN 208836035U
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Abstract
The utility model discloses a kind of control systems of permanent magnet synchronous motor with position sensor; including rectifier bridge, inverter bridge, control panel and respectively be electrically connected with the control panel PWM drive module, detection protection circuit, can communication unit and position sensor; the detection protection circuit includes d. c. voltage signal acquisition unit, phase current signal acquisition unit; and or door, described or door the output controllably connect with the PWM drive module.The utility model realizes the functions such as the under-voltage of frequency converter direct current pressure side, overvoltage protection, overcurrent protection; by or door guarantee that any protection signal can direct hardware lockout PWM drive module; even if software protection disabler can also efficiently accomplish protection.D. c. voltage signal acquisition unit directly connects the positive and negative terminal of DC bus, does not use any voltage sensor, but uses DC bus-bar voltage signal, and that improves signal takes speed.
Description
Technical field
The utility model belongs to motor control technology field, and in particular to a kind of permanent magnet synchronous electric with position sensor
The control system of machine.
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.
Moreover, existing protection circuit is typically all to carry out voltage acquisition by sensor, lead to cost and processing time
Increase, meanwhile, there is also monitoring factor it is few, be unfavorable for the long-time even running of motor.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and it is same to provide a kind of permanent magnetism with position sensor
The control system for walking motor, can effectively improve the safety integrally controlled.
The utility model is achieved through the following technical solutions:
A kind of control system of the permanent magnet synchronous motor with position sensor, including rectifier bridge, inverter bridge, control panel with
And PWM drive module, detection protection circuit, can communication unit and the position sensor being electrically connected respectively with the control panel,
The described detection protection circuit includes d. c. voltage signal acquisition unit, phase current signal acquisition unit, and or door, it is described
Or the output of door is controllably connect with the PWM drive module,
The d. c. voltage signal acquisition unit includes direct through bleeder circuit respectively with positive input terminal and negative input end
The first operational amplifier connecting with DC voltage both ends, the negative input end of first operational amplifier is through capacitor in parallel
C2 and resistance R4 is followed by its output end, and the first operational amplifier output terminal filtering is followed by described or door；
The phase current signal acquisition unit includes second operational amplifier and third operational amplifier, and described second
The positive input terminal and negative input end of operational amplifier are followed by two output ends of current sensor through current-limiting resistance respectively, and described
The anode of two operational amplifiers is grounded through filter capacitor C4 and filter resistance R3 in parallel, and the second operational amplifier is born
Input terminal is followed by its output end through capacitor C2 and resistance R4 in parallel, and the output of the second operational amplifier is followed by through partial pressure
Enter the positive input terminal of third operational amplifier, the negative input end of the third operational amplifier is connect with its output end, described
The output of third operational amplifier described or door is accessed after filtering.
In the above-mentioned technical solutions, the output of the detection protection circuit connects triode T1's through optical coupling isolating chip
The relay concatenation input contactor coil Ts of base stage, the triode T1 meets 24V, emitter ground connection, and the input connects
Three pairs of normally-closed contacts of tentaculum are serially connected in the three-phase input end of rectifier 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 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
It in the above-mentioned technical solutions, further include the storage chip communicated with the DSP control panel, the DSP passes through
Isolating chip and communication chip are connect with the LCD display device.
It in the above-mentioned technical solutions, further include the CAN communication unit communicated with the control panel.
In the above-mentioned technical solutions, the CAN communication unit is the CAN chip with isolation.
In the above-mentioned technical solutions, the terminal of position sensor is connect through voltage conversion chip with DSP control panel.
It the advantages of the utility model and has the beneficial effect that
Realize the under-voltage of frequency converter direct current pressure side, overvoltage protection, overcurrent protection etc. functions, by or door guarantee appoint
What protection signal can directly hardware lockout PWM drive module even if software protection disabler can also efficiently accomplish guarantor
Shield.D. c. voltage signal acquisition unit directly connects the positive and negative terminal of DC bus, does not use any voltage sensor, but uses
The DC bus-bar voltage signal of 540V or so is become the direct current signal of 24V by divider resistance, and that improves signal takes speed.
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 that the d. c. voltage signal of detection protection circuit acquires single schematic diagram.
Fig. 7 is the phase current signal acquisition unit 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 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
A kind of control system of permanent magnet synchronous motor with position sensor of the utility model, including three-phase alternating current
Source 1, rectifier bridge 2, inverter bridge 3, control panel 6, permanent magnet synchronous motor 4, the bus capacitor being serially connected between 2 liang of output ends of rectifier bridge
13, input contactor 14 and the PWM drive module 7 being electrically connected respectively with the control panel, detection protection circuit 10, can
Communication unit 16 and position sensor 15, the detection protection circuit include d. c. voltage signal acquisition unit, phase current letter
Number acquisition unit, and or door, described or door the output connect with the PWM drive module,
The d. c. voltage signal acquisition unit includes with positive input terminal and negative input end respectively through resistance and input electricity
The first operational amplifier of connection is pressed, the negative input end of first operational amplifier is after capacitor C2 and resistance R4 in parallel
Connect its output end, the first operational amplifier output terminal filtering is followed by described or door；
The phase current signal acquisition unit includes second operational amplifier and third operational amplifier, and described second
The positive input terminal and negative input end of operational amplifier are followed by two current input terminals, second operation through current-limiting resistance respectively
The anode of amplifier is grounded through filter capacitor C4 and filter resistance R3 in parallel, the negative input end of the second operational amplifier
It is followed by its output end through capacitor C2 and resistance R4 in parallel, the output of the second operational amplifier accesses third after dividing
The negative input end of the positive input terminal of operational amplifier, the third operational amplifier is connect with its output end, the third
The output of operational amplifier accesses described or door after filtering.
Realize the under-voltage of frequency converter direct current pressure side, overvoltage protection, overcurrent protection etc. functions, by or door guarantee appoint
What protection signal can directly hardware lockout PWM drive module even if software protection disabler can also efficiently accomplish guarantor
Shield.D. c. voltage signal acquisition unit directly connects the positive and negative terminal of DC bus, does not use any voltage sensor, but uses
The DC bus-bar voltage signal of 540V or so is become the direct current signal of 24V by divider resistance, and that improves signal takes speed.
Wherein, the output of the detection protection circuit connects the base stage of triode T1 through optical coupling isolating chip, described
The coil Ts of the relay concatenation input contactor of triode T1 connects 24V, emitter ground connection.Three pairs of the input contactor
Normally-closed contact is serially connected in the three-phase input end of rectifier bridge.Detection protection circuit can directly control the on-off of input contactor, protection
When directly disconnect input contactor 14 normally-closed contact.
Control System of AC Permanent Magnet Synchronous and the specific connection type of primary circuit protection device are as shown in the figure:
The port resistance R1 connection feedback voltage V olInput1, the other end and resistance R4, capacitor C2 and operational amplifier 24
Negative terminal connection, resistance R4, capacitor C2 the other end connect with the output end of operational amplifier 24.Resistance R2 connection feedback voltage
The port VolInput2, the other end connect with the anode of resistance R3, capacitor C1 and operational amplifier 24, resistance R3, capacitor C1
The other end is connect with AGND.One end of resistance R5 is connect with the output end of operational amplifier 24, the other end and capacitor C3, diode
The anode connection of the cathode, diode D8 of D7.The other end of capacitor C3, the anode of diode D7 are connect with AGND, diode D8
Cathode connect with 3.3V, voltage output signal is connect with the cathode of the anode of diode D8, diode D7.
The port resistance R6 connection feedback current CurInput1, the other end and resistance R8, capacitor C5 and operational amplifier 16
Negative terminal connection, resistance R8, capacitor C5 the other end connect with the output end of operational amplifier 25.Resistance R7 connection feedback current
The port CurInput2, the other end connect with the anode of resistance R9, capacitor C4 and operational amplifier 25, resistance R9, capacitor C4
The other end is connect with AGND.One end of resistance R10 is connect with the output end of operational amplifier 25, the other end and resistance R11, operation
The anode of amplifier 17 connects, and one end of resistance R11 is connect with 3.3V, and the other end is connect with the anode of operational amplifier 17.Fortune
The negative terminal for calculating amplifier 17 is connect with its output end, the output end of operational amplifier 17 and capacitor C6, diode D10 cathode,
The anode connection of diode D9.The other end of capacitor C6, diode D10 anode connect with AGND, the cathode of diode D9 and
3.3V connection, current output signal are connect with the cathode of the anode of diode D9, diode D10.
Protection signal Pro is connect with resistance R12, the other end light-coupled isolation chip (model TCM1600) of resistance R12
27, the other end of capacitor C7 connection, capacitor C7 is connect with GND.It is connect with 3.3V.2 ends of light-coupled isolation chip 27,4 ends difference
It is connect with GDN ,+24V.3 ends of light-coupled isolation chip 27 are connect with resistance R13, the other end and resistance R14, R15 of resistance R13
Connection, the other end of resistance R14 are connect with AGND.The other end of resistance R15 is connect with the base stage of triode T1, triode T1's
Emitter is connect with AGND.The collector of triode T1 and anode, the relay coil T of diode D11sConnection, diode D11
Cathode, the relay coil Ts other end connect with+24V.
Wherein, the terminal of position sensor 15 is connect through voltage conversion chip with DSP control panel 6.Specifically, position passes
The terminal of sensor (encoder) 15 is connect with A1, A2, A3 of voltage conversion chip 22 (model TXB0106) respectively, and voltage turns
VccA, the GNDA for changing chip 22 are connect with+5V power supply, GND respectively, output end B1, B2, B3 of voltage conversion chip 22 respectively with
GPIO20, GPIO21, GPIO23 of DSP control panel 6 are connected.VccB, GNDB of voltage conversion chip 22 are electric with+3.3V respectively
Source, GND connection.The 5V level conversion of position sensor 15 is the received 3.3V level of DSP energy by voltage conversion chip, simultaneously also
Play certain isolation Anti-Jamming.
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 11 that cathode rectifier output end is arranged in, DC transformating power 8 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 12 be arranged in parallel with the charging resistor.Preferably, 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.
Embodiment three
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 bright 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 DC power supply of Jin Shengyang company again
Module (model IB2405LS-1W, WRA2415S-3W and K7803-500R2) is respectively converted to 24V 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 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.
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, 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.Its connection type is as follows:
CAN communication terminal is connect with CANH, CANL of CAN communication chip 23 (model SN65HVD230) respectively, and CAN is logical
VCC, GND of news chip 23 are connect with+3.3V power supply, GND respectively.The Vss of CAN communication chip 23 is connect with GND.CAN communication
TxD, RxD of chip 23 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 in figure
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, which can be positioned in other ways, (to be rotated by 90 ° or position
In 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
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 the permanent magnet synchronous motor with position sensor, which is characterized in that including rectifier bridge, inversion
Bridge, control panel and the PWM drive module being electrically connected respectively with the control panel, detection protection circuit, can communication unit and
Position sensor, the described detection protection circuit include d. c. voltage signal acquisition unit, phase current signal acquisition unit, and
Or door, described or door the output are controllably connect with the PWM drive module,
The d. c. voltage signal acquisition unit include with positive input terminal and negative input end respectively through bleeder circuit directly and directly
Galvanic electricity presses the first operational amplifier of both ends connection, the negative input end of first operational amplifier through capacitor C2 in parallel and
Resistance R4 is followed by its output end, and the first operational amplifier output terminal filtering is followed by described or door；
The phase current signal acquisition unit includes second operational amplifier and third operational amplifier, second operation
The positive input terminal and negative input end of amplifier are followed by two output ends of current sensor, second fortune through current-limiting resistance respectively
The anode for calculating amplifier is grounded through filter capacitor C4 and filter resistance R3 in parallel, the negative input of the second operational amplifier
End is followed by its output end through in parallel capacitor C2 and resistance R4, and the output of the second operational amplifier accesses the after dividing
The negative input end of the positive input terminal of three operational amplifiers, the third operational amplifier is connect with its output end, and described
The output of three operational amplifiers accesses described or door after filtering.
2. the control system of the permanent magnet synchronous motor with position sensor as described in claim 1, it is characterised in that: described
The output of detection protection circuit the base stage of triode T1, the relay string of the triode T1 are connect through optical coupling isolating chip
It meets input contactor coil Ts and meets 24V, emitter ground connection, three pairs of normally-closed contacts of the input contactor are serially connected in rectifier bridge
Three-phase input end.
3. the control system of the permanent magnet synchronous motor with position sensor as described in claim 1, it is characterised in that: also wrap
Include prevent to bus capacitor charge when overcurrent pre-charge circuit, the pre-charge circuit include setting rectifier bridge just
Charging resistor, DC transformating power and the anti-overflow D.C. contactor of pole output end, wherein the DC transformating power
Input terminal is connected with the output of rectifier bridge, and the relay coil of the anti-overflow D.C. contactor is serially connected in DC converting electricity
The outlet side in source, a pair of of normally opened contact of the anti-overflow anti-overflow D.C. contactor is in parallel with the charging resistor to be set
It sets.
4. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 3, feature exist
In: the output of the DC transformating power is 24V direct current, and the anti-overflow D.C. contactor is 24V D.C. contactor.
5. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 1, feature exist
In: it further include DC power supply, the DC power supply includes with U, V phase in three-phase input power supply as input
Direct current redundant module, with the output end of the direct current redundant module and multiple DC power suppliers for connecing, the direct current
Source module is respectively the control panel, detection protection circuit and voltage detecting circuit and the power supply of PWM drive module.
6. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 1, feature exist
In: the control panel is DSP control panel, further includes and the DSP control panel communication connection display device.
7. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 6, feature exist
In: the display device is LCD display device, is communicated in a manner of RS232 with the DSP control panel.
8. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 7, feature exist
In: further include the storage chip communicated with the DSP control panel, the DSP by isolating chip and communication chip with
The LCD display device connection.
9. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 1, feature exist
In: it further include the CAN communication unit communicated with the control panel.
10. a kind of control system of permanent magnet synchronous motor with position sensor according to claim 1, feature exist
In: the terminal of position sensor is connect through voltage conversion chip with DSP control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821737983.7U CN208836035U (en) | 2018-10-25 | 2018-10-25 | The control system of permanent magnet synchronous motor with position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821737983.7U CN208836035U (en) | 2018-10-25 | 2018-10-25 | The control system of permanent magnet synchronous motor with position sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208836035U true CN208836035U (en) | 2019-05-07 |
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ID=66319621
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|---|---|---|---|
| CN201821737983.7U Active CN208836035U (en) | 2018-10-25 | 2018-10-25 | The control system of permanent magnet synchronous motor with position sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN208836035U (en) |
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2018
- 2018-10-25 CN CN201821737983.7U patent/CN208836035U/en active Active
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