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

A permanent magnet synchronous motor, maximum power technology, applied in motor control, motor generator control, control of electromechanical brakes, etc., can solve the problems of inability to achieve maximum power control, large current trajectory deviation, etc., to achieve fast iterative convergence speed, calculation Small volume and the effect of improving running performance

Active Publication Date: 2022-03-08
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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specific Embodiment approach 1

[0113] Specific implementation mode one: the following combination Figure 1 to Figure 6 Describe this embodiment, the method for searching the maximum power control current trajectory of the permanent magnet synchronous motor described in this embodiment, the method is: when the motor is running below the base speed value, under the given torque command, speed command, voltage limit, current Under the limit, the MTPA control method is used to obtain the current operating point with the smallest current amplitude as the current trajectory; when the motor is running above the base speed value, under the given torque command, speed command, voltage limit, and current limit, the field weakening zone is used The maximum power control method obtains the current operating point with the maximum output power 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 o...

specific Embodiment approach 2

[0264] Specific implementation mode two: the following combination Figure 7 Describe this embodiment, the permanent magnet synchronous motor maximum power control online control method described in this embodiment, using the permanent magnet synchronous motor maximum power control current trajectory search method described in Embodiment 1 to obtain the permanent magnet synchronous motor under multiple operating points The current trajectories of these current trajectories are used as sample data to train and generate the maximum power control neural network model. The input of the maximum power control neural network model is the motor speed, torque, current limit value and voltage limit value, and the output is the current amplitude and current angle;

[0265] Loading the maximum power control neural network model into the DSP or FPGA controller can realize the maximum power online control of the permanent magnet synchronous motor, and output the current amplitude and curren...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/34H02P21/14H02P21/20H02P21/22H02P25/022
CPCH02P6/34H02P21/14H02P21/141H02P21/20H02P21/22H02P21/0014H02P25/022H02P21/0089H02P2207/05
Inventor 郑萍王明峤乔光远杨士杰王于涛黄家萱
Owner HARBIN INST OF TECH
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