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High dynamic response torque current control method for permanent magnet synchronous motor

A permanent magnet synchronous motor, torque current technology, applied in the direction of suppressing motor vibration control, motor control, motor generator control, etc., can solve the problems of poor dynamic performance, motor chattering, etc., to increase the realization accuracy and reduce the chattering. Vibration, the effect of increasing the response speed

Active Publication Date: 2021-04-27
中山绿威科技有限公司
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AI Technical Summary

Problems solved by technology

[0005] The invention discloses a high dynamic response torque current control method of a permanent magnet synchronous motor, which solves the technical problem of poor dynamic performance and vibration of the motor

Method used

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  • High dynamic response torque current control method for permanent magnet synchronous motor
  • High dynamic response torque current control method for permanent magnet synchronous motor
  • High dynamic response torque current control method for permanent magnet synchronous motor

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Embodiment Construction

[0035] Attached below Figure 1-5 The high dynamic response torque current control method of the permanent magnet synchronous motor of the present invention will be further described in detail.

[0036] Such as figure 1 and figure 2 As shown, the present invention discloses a high dynamic response torque current control method for a permanent magnet synchronous motor, comprising the following steps:

[0037] Step S1: The permanent magnet synchronous motor works in the speed mode, and calculates the given speed n * The deviation Δn from the actual speed n;

[0038] Step S2: Send Δn to PI controller PI1 to get the torque current given value

[0039] Step S3: Calculate torque current given value and actual torque current i q Deviation Δi q ;

[0040] Step S4: Set Δi q Send it to PI controller PI2 to get the given value of q-axis voltage

[0041] Step S5: Perform torque current compensation on the q-axis to obtain a given voltage on the q-axis

[0042] Step S6: ...

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Abstract

The invention discloses a high dynamic response torque current control method for a permanent magnet synchronous motor. On the basis of obtaining the opposite potential coefficient and current coefficient of the motor, the invention adds a torque current compensation link in the current loop of the permanent magnet synchronous motor, Calculate the torque current value related to the back EMF coefficient and current coefficient that can be pre-calculated at a certain speed, and cooperate with the original PI control to reduce the current error, increase the response speed and realization accuracy of the current loop, and reduce the The vibration of the motor is reduced, the following performance of the motor is improved, and the dynamic response performance of the permanent magnet synchronous motor is improved.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and in particular relates to a high dynamic response torque current control method of a permanent magnet synchronous motor. Background technique [0002] In the permanent magnet synchronous motor AC servo system, the current loop determines the transient and steady-state performance of the system. How to construct a current loop with high stability, good dynamic performance and high control precision becomes the key to high-performance servo control. Therefore, current control with excellent transient properties has become a research hotspot in servo control. [0003] There are many kinds of control algorithms for permanent magnet synchronous motors. The current research is relatively mature and the most used are proportional integral (PI) control and direct torque control. PI control has good steady-state control performance, but its dynamic performance is poo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/05H02P21/22H02P23/00H02P23/04H02P25/022
CPCH02P21/0003H02P21/05H02P23/0004H02P23/04H02P25/022H02P2205/01H02P2207/05H02P21/22
Inventor 吴嘉欣张懿魏海峰李震李可礼李垣江刘维亭
Owner 中山绿威科技有限公司
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