Current Trajectory Search Method and Online Control Method for Maximum Power Control of Permanent Magnet Synchronous Motor

Abstract

A permanent magnet synchronous motor maximum power control current trajectory search method and an online control method belong to the field of motors. The present invention solves the problem that the traditional algorithm uses fixed parameter values ​​to calculate the current trajectory under maximum power control. There is a large deviation, and accurate maximum power control cannot be realized. question. The method of the invention is as follows: when the motor runs below the base speed value, the MTPA control method is used to obtain the current operating point with the smallest current amplitude as the current track; when the motor runs above the base speed value, the output power is obtained by using the maximum power control method in the magnetic field weakening area The maximum current operating point is used as the current trajectory, and the maximum power control method in the field weakening area includes two search methods: the current angle θ is in [θ a ,θ b ] within the range of current limit circular current trajectory search method, when θ>θ b When using MTPV control mode, θ a is the field-weakening current angle when the current amplitude of the permanent magnet motor reaches the current limit value under MTPA control, θ b is the field-weakening current angle when the current amplitude of the permanent magnet motor reaches the current limit under MTPV control.

Description

technical field [0001] The invention relates to a current trajectory search algorithm for maximum power control of a permanent magnet synchronous motor, a nonlinear flux linkage model of a permanent magnet synchronous motor and an online maximum power control algorithm for a permanent magnet synchronous motor based on a neural network, belonging to the field of motors . Background technique [0002] In recent years, the number of traditional automobiles has increased sharply, which has caused increasingly serious environmental pollution problems, and has gradually become one of the important factors that exacerbate global warming and the greenhouse effect. At the same time, traditional automobiles use internal combustion engines, which have a low energy conversion rate and rely heavily on non-renewable resources such as petroleum. The dual pressures of environmental pollution and energy crisis have prompted the traditional automobile industry to gradually develop towards new...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional algorithm uses fixed parameter values ​​to calculate the current track under the maximum power control, which has a large deviation and cannot achieve accurate maximum power control. It provides a permanent magnet synchronous motor maximum power control current track search method and On-line control method

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