CN203691315U - Three-phase permanent magnet synchronous motor driving circuit - Google Patents
Three-phase permanent magnet synchronous motor driving circuit Download PDFInfo
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- CN203691315U CN203691315U CN201320849286.1U CN201320849286U CN203691315U CN 203691315 U CN203691315 U CN 203691315U CN 201320849286 U CN201320849286 U CN 201320849286U CN 203691315 U CN203691315 U CN 203691315U
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
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Abstract
The utility model provides a three-phase permanent magnet synchronous motor driving circuit, which comprises a digital circuit for realizing the control algorithm of a position ring and a speed ring and an analog circuit for realizing the current closed loop and the generation of PWM signals; the digital circuit comprises an FPGA, a DSP and a DAC; the analog circuit comprises an 2/3 conversion circuit, a current loop adjusting circuit, a triangular wave generator, a comparator, a current detection circuit and a three-phase bridge driving circuit; the FPGA, the DSP and the DAC are connected in sequence; 2/3 conversion circuit is connected with DAC, current loop adjusting circuit is connected with 2/3 conversion circuit, current loop adjusting circuit is connected with comparator and current detecting circuit; the three-phase bridge driving circuit is arranged between the comparator and the current detection circuit; the triangular wave generator is connected with the comparator. The utility model relates to a three-phase PMSM drive circuit, drive circuit realize position ring, speed ring and three closed loop three-phase PMSM control of electric current ring.
Description
Technical field
The utility model relates to a kind of drive circuit of three-phase permanent magnet synchronous motor, and the hardware that is specifically related to a kind of three-phase permanent magnet synchronous motor vector control is realized.
Background technology
Three-phase permanent magnet synchronous motor control method mainly contains three kinds: the control of simple sinusoidal ripple, vector control and direct torque control.The control of simple sinusoidal ripple cannot meet high-precision control requirement.Direct torque built in aspects such as low-speed performance, speed adjustable range, startabilities all be not as excellent as vector control performance.What therefore application was at present more is vector control, and conventional method need be carried out A/D conversion to the magnitude of current collecting, and is then completed the work such as collection, coordinate transform, current loop control, output coordinate conversion by digital circuit, finally exports three-phase controlled quentity controlled variable.The algorithm that digital circuit need to complete is more, is unfavorable for the realization of complex control algorithm.
Utility model content
In order to solve existing technical problem in background technology, the utility model proposes a kind of three-phase permanent magnet synchronous motor drive circuit, drive circuit is realized position ring, speed ring and electric current loop three closed loop three-phase permanent magnet synchronous motor controls.
Technical solution of the present utility model is: a kind of three-phase permanent magnet synchronous motor drive circuit, is characterized in that: drive circuit comprises the digital circuit of the control algolithm that realizes position ring and speed ring and realizes current closed-loop and the analog circuit of pwm signal generation; Digital circuit comprises FPGA, DSP, DAC; Analog circuit comprises 2/3 translation circuit, electric current loop regulating circuit, triangular-wave generator, comparator, current detection circuit and three-phase bridge drive circuit; Described FPGA, DSP, DAC connect successively; 2/3 translation circuit is connected with DAC, and electric current loop regulating circuit is connected with 2/3 translation circuit, and electric current loop regulating circuit connects respectively comparator, current detection circuit; Three-phase bridge drive circuit is arranged between comparator and current detection circuit; Triangular-wave generator is connected with comparator.
Above-mentioned comparator is three, and each comparator is connected with electric current loop regulating circuit, triangular-wave generator, three-phase bridge drive circuit respectively.
The position detecting device that foregoing circuit also comprises motor and is connected with motor, position detecting device is connected with FPGA; Motor is connected with current detection circuit.
Above-mentioned position detecting device is photoelectric encoder, and photoelectric encoder is connected with the rotor of motor.
The utlity model has following advantage: 1) be beneficial to and realize high-precision permagnetic synchronous motor control, and be easy to Project Realization; 2) reduce the task amount of DSP, the realization of having concentrated control algolithm; 3) analog electric current loop is realized good frequency domain characteristic.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Embodiment
Referring to Fig. 1, the whole drive circuit of the utility model is divided into digital circuit and analog circuit two parts.The control algolithm of digital circuit position ring and speed ring, analog circuit realizes current closed-loop and pwm signal produces.Each closed loop all has controlled quentity controlled variable, feedback quantity input and output amount to form.
Digital circuit is mainly made up of FPGA, DSP, DAC.FPGA is responsible for gathering rotor position information, and calculates motor rotor speed, then gives DSP by rotor-position and velocity information, as the feedback quantity of position ring and speed ring.DSP completes following work: communicate by letter with host computer, position ring control algolithm realize, speed ring control algolithm realize, output variable coordinate transform.
According to the instruction of host computer, utilize and obtain feedback quantity from FPGA, realize the control algolithm of position ring and speed ring.The output variable of speed ring is the controlled quentity controlled variable of electric current loop, and DSP will carry out coordinate transform to this controlled quentity controlled variable before output.Coordinate transform refers to from two-phase rotating coordinate system and is transformed into three phase static coordinate system.After changing, be three-phase current controlled quentity controlled variable, get wherein two-phase and export by DAC.DAC is responsible for the biphase current ring controlled quentity controlled variable of DSP output to be transformed to analog output.
Analog circuit comprises 2/3 translation circuit 1, electric current loop regulating circuit 2, triangular-wave generator 3, comparator 4, current detection circuit 5, three-phase bridge drive circuit 6.Meet I according to permagnetic synchronous motor A, B, C three-phase current
a+ I
b+ I
c=0 relation, biphase current ring controlled quentity controlled variable is converted to three-phase current ring controlled quentity controlled variable by 2/3 translation circuit 1.Current detection circuit 5 detects permagnetic synchronous motor three-phase current, as the feedback quantity input of electric current loop.Electric current loop regulating circuit 2 completes the control of electric current loop, output three-phase rotor controlled quentity controlled variable.This controlled quentity controlled variable is sinusoidal wave analog current.Triangular-wave generator 3 produces certain frequency triangular wave.Electric current loop regulating circuit 2 adopts operational amplifier to realize regulatory function; Comparator 4 is input as sine wave and triangular wave, output PWM level signal, and this function can realize by the corresponding integrated chip product of type selecting; Three-phase bridge drives and realizes by type selecting integrated chip; Current detection circuit 5 is realized by current sampling resistor; Biphase current ring controlled quentity controlled variable is converted to three-phase current ring controlled quentity controlled variable by 2/3 translation circuit 1, according to the relation of IA+IB+IC=0, utilizes operational amplifier to realize add circuit and negater circuit completes function.
Sine wave simulation controlled quentity controlled variable and triangle wave that comparator 4 is exported electric current loop regulating circuit 2 obtain pwm control signal, and this signal driver three-phase bridge drive circuit completes permagnetic synchronous motor and drives.
The control that completes three-phase permanent magnet synchronous motor needs the position of real-time detection rotor, therefore needs position detecting device 6 to complete this task.Use photoelectric encoder to be connected with rotor as position detecting device 6, output rotor position, FPGA is responsible for gathering this positional information.
Claims (4)
1. a three-phase permanent magnet synchronous motor drive circuit, is characterized in that: drive circuit comprises the digital circuit of the control algolithm that realizes position ring and speed ring and realizes current closed-loop and the analog circuit of pwm signal generation; Digital circuit comprises FPGA, DSP, DAC; Analog circuit comprises 2/3 translation circuit, electric current loop regulating circuit, triangular-wave generator, comparator, current detection circuit and three-phase bridge drive circuit; Described FPGA, DSP, DAC connect successively; 2/3 translation circuit is connected with DAC, and electric current loop regulating circuit is connected with 2/3 translation circuit, and electric current loop regulating circuit connects respectively comparator, current detection circuit; Three-phase bridge drive circuit is arranged between comparator and current detection circuit; Triangular-wave generator is connected with comparator.
2. three-phase permanent magnet synchronous motor drive circuit according to claim 1, is characterized in that: described comparator is three, and each comparator is connected with electric current loop regulating circuit, triangular-wave generator, three-phase bridge drive circuit respectively.
3. three-phase permanent magnet synchronous motor drive circuit according to claim 2, is characterized in that: the position detecting device that described circuit also comprises motor and is connected with motor, and position detecting device is connected with FPGA; Motor is connected with current detection circuit.
4. three-phase permanent magnet synchronous motor drive circuit according to claim 3, is characterized in that: described position detecting device is photoelectric encoder, photoelectric encoder is connected with the rotor of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849286.1U CN203691315U (en) | 2013-12-19 | 2013-12-19 | Three-phase permanent magnet synchronous motor driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849286.1U CN203691315U (en) | 2013-12-19 | 2013-12-19 | Three-phase permanent magnet synchronous motor driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691315U true CN203691315U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320849286.1U Expired - Fee Related CN203691315U (en) | 2013-12-19 | 2013-12-19 | Three-phase permanent magnet synchronous motor driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691315U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715957A (en) * | 2013-12-19 | 2014-04-09 | 中国科学院西安光学精密机械研究所 | Three-phase permanent magnet synchronous motor driving circuit |
| CN106533292A (en) * | 2016-10-19 | 2017-03-22 | 上海铼钠克数控科技股份有限公司 | Motor driver, servo drive device and numerical control machine tool |
-
2013
- 2013-12-19 CN CN201320849286.1U patent/CN203691315U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715957A (en) * | 2013-12-19 | 2014-04-09 | 中国科学院西安光学精密机械研究所 | Three-phase permanent magnet synchronous motor driving circuit |
| CN106533292A (en) * | 2016-10-19 | 2017-03-22 | 上海铼钠克数控科技股份有限公司 | Motor driver, servo drive device and numerical control machine tool |
| CN106533292B (en) * | 2016-10-19 | 2019-05-10 | 上海铼钠克数控科技股份有限公司 | Motor driver, servo drive and numerically-controlled machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20161219 |