阅读说明：本技术 一种无位置传感器的油泵永磁同步电机专用控制器 (Special controller for oil pump permanent magnet synchronous motor without position sensor ) 是由 刘廷坤 张华烨 谭建华 周厚明 于 2020-04-30 设计创作，主要内容包括：本发明提供一种无位置传感器的油泵永磁同步电机专用控制器,涉及控制器领域。该无位置传感器的油泵永磁同步电机专用控制器,包括驱动电路、磁链观测器、速度调节器、电流调节器、电流脉冲发生模块、逻辑控制单元、A/D转换器、永磁同步电机,所述驱动电路与永磁同步电机的输入端连接,所述电流脉冲发生模块的输出端与驱动电路的控制信号输入端连接,所述电流调节器的信号输出端与电流脉冲发生模块的信号输入端连接,所述速度调节器的输出端与逻辑控制单元的输入端连接。通过该无位置传感器的油泵永磁同步电机专用控制器的使用,使得永磁同步电机的结构变得简单、同时调速性能更好好,可以实现一键式设定,使用非常方便。(The invention provides a special controller for a position-sensor-free oil pump permanent magnet synchronous motor, and relates to the field of controllers. The controller special for the oil pump permanent magnet synchronous motor without the position sensor comprises a driving circuit, a flux linkage observer, a speed regulator, a current pulse generation module, a logic control unit, an A/D converter and a permanent magnet synchronous motor, wherein the driving circuit is connected with the input end of the permanent magnet synchronous motor, the output end of the current pulse generation module is connected with the control signal input end of the driving circuit, the signal output end of the current regulator is connected with the signal input end of the current pulse generation module, and the output end of the speed regulator is connected with the input end of the logic control unit. Through the use of the special controller for the oil pump permanent magnet synchronous motor without the position sensor, the structure of the permanent magnet synchronous motor becomes simple, the speed regulation performance is better, one-key setting can be realized, and the use is very convenient.)

1. A controller special for a position sensor-free oil pump permanent magnet synchronous motor comprises a driving circuit, a flux linkage observer, a speed regulator, a current pulse generation module, a logic control unit, an A/D converter and a permanent magnet synchronous motor, and is characterized in that: the drive circuit is connected with the input end of the permanent magnet synchronous motor, the output end of the current pulse generation module is connected with the control signal input end of the drive circuit, the signal output end of the current regulator is connected with the signal input end of the current pulse generation module, the output end of the speed regulator is connected with the input end of the logic control unit, the A/D converter is connected with the signal input end of the current regulator, the speed feedback output end of the flux linkage observer is connected with the signal input end of the speed regulator, the position signal output end of the flux linkage observer is connected with the input end of the logic unit, the input end of the flux linkage controller is connected with the permanent magnet synchronous motor, and the input end of the A/D converter is connected with the permanent magnet synchronous motor.

2. The controller special for the oil pump permanent magnet synchronous motor without the position sensor according to claim 1, characterized in that: the current pulse generation module comprises a triangular wave generator and a PWM generator, and the output end of the triangular wave generator is connected with the input end of the PWM generator.

3. The controller special for the oil pump permanent magnet synchronous motor without the position sensor as claimed in claim 2, wherein: the output end of the logic control unit is connected with the control input end of the PWM generator, and the output end of the current regulator is connected with the control input end of the PWM generator.

4. The controller special for the oil pump permanent magnet synchronous motor without the position sensor according to claim 1, characterized in that: and the input end of the control circuit is connected with a power supply.

5. The controller special for the oil pump permanent magnet synchronous motor without the position sensor according to claim 1, characterized in that: the driving circuit is formed by connecting a diode, a power tube, a resistor and two control switches.

6. The controller special for the oil pump permanent magnet synchronous motor without the position sensor according to claim 1, characterized in that: the speed regulator, the current regulator and the logic control unit form a regulating system of the whole controller.

Technical Field

The invention relates to the technical field of controllers, in particular to a special controller for a position-sensor-free oil pump permanent magnet synchronous motor.

Background

The motor controller is an integrated circuit which controls the motor to work according to the set direction, speed, angle and response time through active work. The motor controller may be operated manually, remotely or automatically, and may include only the function of starting and stopping the motor, or may include other more complex functions. The motor controller may be categorized by the type of cooperating motor, such as driving a permanent magnet synchronous motor, a servo motor, a series or separately excited dc motor, or an ac motor. The motor controller is connected to a power source, such as a battery or mains, and has circuits for inputting and outputting (digital or analog) signals.

At present, oil pump driving motors of hydraulic systems of machine tools or other equipment are all cage type three-phase alternating current motors, and speed regulating systems of the motors are frequency converters. The frequency converter has the defects of complex structure, higher requirements on the use environment, higher cost and the like. As shown in fig. 1, a position sensor is mounted on a motor of a conventional permanent magnet synchronous motor to detect the position and feed back the speed of the motor, so that the motor can be started and controlled, the structure of the whole motor becomes complex, the speed regulation performance is general, the debugging is complex, and the consumed working time is long.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a special controller for an oil pump permanent magnet synchronous motor without a position sensor, and solves the problems of complex structure, general speed regulation performance and complex debugging of the existing motor controller.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a controller special for a position-sensorless oil pump permanent magnet synchronous motor comprises a driving circuit, a flux linkage observer, a speed regulator, a current pulse generation module, a logic control unit, an A/D converter and a permanent magnet synchronous motor, wherein the driving circuit is connected with the input end of the permanent magnet synchronous motor, the output end of the current pulse generation module is connected with the control signal input end of the driving circuit, the signal output end of the current regulator is connected with the signal input end of the current pulse generation module, the output end of the speed regulator is connected with the input end of the logic control unit, the A/D converter is connected with the signal input end of the current regulator, the speed feedback output end of the flux linkage observer is connected with the signal input end of the speed regulator, and the position signal output end of the flux linkage observer is connected with the input end of the logic unit, the input end of the magnetic linkage controller is connected with the permanent magnet synchronous motor, and the input end of the A/D converter is connected with the permanent magnet synchronous motor.

Preferably, the current pulse generating module comprises a triangular wave generator and a PWM generator, and an output end of the triangular wave generator is connected with an input end of the PWM generator.

Preferably, the output of the logic control unit is connected to the control input of the PWM generator, and the output of the current regulator is connected to the control input of the PWM generator.

Preferably, the input end of the control circuit is connected with a power supply.

Preferably, the driving circuit is formed by connecting a diode, a power tube, a resistor and two control switches.

Preferably, the speed regulator, the current regulator and the logic control unit form a regulating system of the whole controller.

The working principle is as follows: firstly, the controller is connected with the permanent magnet synchronous motor to obtain specific parameters of the permanent magnet synchronous motor, the controller is switched to an open loop state, an A/D converter converts a current signal of the permanent magnet synchronous motor into a digital signal and transmits the digital signal to a current regulator, a triangular wave generator continuously injects high-frequency current pulses to a PWM generator, the current regulator transmits a regulating signal to the PWM generator, the PWM generator regulates the high-frequency current pulses and then transmits the high-frequency current pulses into a control circuit, so that a power tube is once conducted according to a program setting mode, and the permanent magnet synchronous motor rotates at a low speed; and finally, when the permanent magnet synchronous motor rotates, the controller drives the flux linkage observer to detect the flux linkage instantaneous value of the permanent magnet synchronous motor to judge the position and speed instantaneous value of the motor rotor, so that the controller enters closed-loop control, then the flux linkage observer transmits speed feedback to the speed regulator, the speed regulator transmits a regulating signal to the logic control unit, the flux linkage observer directly transmits the position feedback to the logic control unit, then the logic control unit transmits the processed regulating signal to the PWM generator, and the PWM generator regulates current pulses transmitted from the triangular wave generator again and transmits the current pulses to the drive circuit to complete the starting of the motor.

(III) advantageous effects

The invention provides a special controller for an oil pump permanent magnet synchronous motor without a position sensor. The method has the following beneficial effects:

1. compared with the existing device, the flux linkage observer is used for replacing the position sensor in the special controller for the oil pump permanent magnet synchronous motor, namely, a software algorithm model is used for replacing the position sensor hardware, and the hardware structure of the controller is simplified.

2. Compared with the existing device, the device adopts a software algorithm model to replace position sensor hardware, the speed of the whole motor controller is adjusted more conveniently, stably and accurately through a software algorithm, and meanwhile, the debugging difficulty is simplified, so that common operators can debug the motor controller.

Drawings

FIG. 1 is a control schematic diagram of a conventional permanent magnet synchronous motor;

fig. 2 is a schematic diagram of a position sensorless synchronous motor controller designed by the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.