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Permanent magnet synchronous motor angle error adaptive method

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: 2019-04-05
WISDRI WUHAN AUTOMATION
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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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  • Permanent magnet synchronous motor angle error adaptive method
  • Permanent magnet synchronous motor angle error adaptive method
  • Permanent magnet synchronous motor angle error adaptive method

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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 permanent magnet synchronous motor angle error adaptive method. The angle error adaptive method automatically adjusts the instability caused by the angular deviation of the permanent magnet synchronous motor during operation. The method employs an iq compensation mode at a high-speed field weakening region to control a modulation factor in an expected range. The compensation condition and the limit value of the compensation value can be set according to the actual conditions, and a smooth transition strategy is adopted between the compensation and the non-compensationto achieve stable operation of the motor in the full speed range. The actual measurement result shows 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 Applications(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