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A method for self-adaptation of angle error of permanent magnet synchronous motor

A permanent magnet synchronous motor and angle error technology, which is applied in the estimation/correction of motor parameters, motor control, electrical components, etc., can solve the problems of difficult realization and low control accuracy, and achieve the effect of stable and controllable modulation coefficient

Active Publication Date: 2021-11-19
WISDRI WUHAN AUTOMATION
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the angle error can ensure that the angle error is within a small range to a certain extent, and improve the adverse effects of the angle error on the control system, but the control accuracy is not high, and it is not easy to achieve; from reducing the angle error brings Start with the impact of the id, iq to compensate for the correction

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  • A method for self-adaptation of angle error of permanent magnet synchronous motor
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  • A method for self-adaptation of angle error of permanent magnet synchronous motor

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Embodiment Construction

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0052] Combine below Figure 1 to Figure 5 Introduce the embodiment of the present invention, concrete steps are:

[0053] Step 1: Design compensation method and acquisition and calculation method of compensation amount;

[0054] The compensation method described in step 1 is to use the voltage feedback method to adjust the torque current i q Make corrections, specifically:

[0055]

[0056] Among them, i q * (U dq_exp ) is the torque current af...

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Abstract

The invention discloses a method for self-adapting the angle error of a permanent magnet synchronous motor. The angle error adaptive method realizes automatic adjustment for the instability caused by the angle deviation during the operation of the permanent magnet synchronous motor. The method is to use iq compensation in the high-speed field weakening area to control the modulation coefficient within the expected range. Compensation conditions and compensation limits can be set according to actual conditions, and a smooth transition strategy is adopted between compensation and non-compensation to achieve stable operation of the motor within the full speed range. The experimental results show the effectiveness and stability of the method.

Description

technical field [0001] The present invention relates to the strategy research of permanent magnet synchronous motor to deal with angle deviation, in particular to a method for self-adaptation of permanent magnet synchronous motor angle error. Background technique [0002] During the driving of electric vehicles, the initial position angle of the permanent magnet synchronous motor is prone to deviation, which has a great impact on the dynamic performance and steady-state performance of the motor, causing the motor modulation coefficient to exceed the controllable range, or even out of control. At this time, it is necessary to take countermeasures At present, there are mainly two processing methods: starting from reducing the angle deviation, designing an automatic calibration strategy for the angle deviation, or performing algorithmic compensation for the angle deviation. Reducing the angle error can ensure that the angle error is within a small range to a certain extent, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/14
CPCH02P23/14H02P2203/09
Inventor 陈华进洪洁张航王胜勇卢家斌王傲能王闻宇
Owner WISDRI WUHAN AUTOMATION