MTPA curve fitting method for embedded permanent magnet synchronous motor and control system

A permanent magnet synchronous motor and curve fitting technology, which is applied in the control system, vector control system, motor generator control, etc., can solve the problem that the MTPA curve cannot take into account the calculation and accuracy requirements at the same time, and achieve high precision and simple calculation. Effect
CN107896080AInactive Publication Date: 2018-04-10CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
Publication Date
2018-04-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an MTPA curve fitting method for an embedded permanent magnet synchronous motor. The method includes the steps of solving a permanent magnet linkage of a motor rotor accordingto the motor zero-load counter electromotive force and a rotating speed measured through an experiment, controlling q-axis current and d-axis current, measuring the experimental data of the corresponding relation between the q-axis inductance and the q-axis current, and between the d-axis inductance and the d-axis current, obtaining plurality of equal-interval torque values according to the calculation formula of the torque and q-axis current meeting the MTPA condition and through giving the q-axis current, obtaining the d-axis current under the corresponding torque according to the q-axis current and d-axis current relation meeting the MTPA condition, and fitting a MTPA curve of the torque and q-axis current and d-axis current relation based on a plurality of obtained equal-interval torque values of zero-to-maximum torques. The method aims at solving the problems that a formula calculation method is not high in precision, the operation of an experiment test method is complicated. An embedded permanent magnet synchronous motor MTPA curve comprehensive drawing method and a control system which can meet calculation and precision requirements are provided.
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Description

technical field

[0001] The invention belongs to the technical field of motor control, and relates to a maximum torque current ratio (Maximum Torque Per Ampere, MTPA) curve fitting method of an embedded permanent magnet synchronous motor and an MTPA control system of the embedded permanent magnet synchronous motor. The problem to be solved by the present invention is to propose a MTPA curve fitting method and control system based on an interior permanent magnet synchronous motor (Interior Permanent Magnet Synchronous Motor, IPMSM), which is simple in calculation, high in precision, practical and reliable. Background technique

[0002] In recent years, with the attention of all walks of life to environmental protection issues, the embedded permanent magnet synchronous motor with the characteristics of high efficiency, energy saving, practical reliability, and strong robustness has become a hot spot in all walks of life, especially in industrial intelligent robots. , new energy...

Claims

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