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Method and system for correcting initial angle of rotor of permanent magnet synchronous motor

A permanent magnet synchronous motor, initial angle technology, applied in control systems, control generators, vector control systems, etc., can solve the problems of inability to accurately locate the initial angle of the rotor, poor universality of tooling, etc., to achieve universality, precise adjustment and The effect of positioning

Inactive Publication Date: 2019-08-06
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a permanent magnet synchronous motor rotor initial angle correction method and correction system to solve the problem that the existing rotor initial angle positioning method cannot accurately locate the initial rotor angle, and at the same time solve the problem of poor tooling versatility

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  • Method and system for correcting initial angle of rotor of permanent magnet synchronous motor
  • Method and system for correcting initial angle of rotor of permanent magnet synchronous motor

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] Such as figure 1 As shown, the embodiment of the present invention provides a permanent magnet synchronous motor rotor initial angle correction method, which includes the following steps:

[0047] Step S100 , controlling the prime mover to drive the permanent magnet motor to run at no-load at various speeds, and obtain the no-load opposite electromotive force curves of the permanent magnet motor at various speeds.

[0048] Specifically, disconnect the three-phase connection between the tested permanent magnet motor and the invert...

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Abstract

The invention discloses a permanent magnet synchronous motor initial angle correction method and a correction system, the judgment of an estimated value of rotor angle and an actual value lead-lag relationship is realized through judging a difference value between a theoretical no-load opposite electromotive force peak value and current quadrature-axis voltage component and voltage control error, so that precision regulation and positioning of a rotor initial angle are realized; in addition, when rotor initial angles of different motors need to regulate and correct, only the motor needs to be changed, and the universality of the correction system is realized.

Description

technical field [0001] The invention relates to the technical field of motor testing, in particular to a method and system for correcting the initial angle of a rotor of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have low power consumption, high efficiency, and wide speed range, and are widely used in the field of electric vehicles. The control of permanent magnet synchronous motors for vehicles mostly uses vector control algorithms, and the high-performance vector control of permanent magnet synchronous motors is inseparable. Accurate rotor initial angle, so it is necessary to identify and confirm the initial rotor angle of each factory permanent magnet synchronous motor. If the identification is inaccurate, it may cause the permanent magnet synchronous motor to fail to start normally, out of step, and will greatly reduce the efficiency of the motor, and even affect the mileage of the vehicle. [0003] In the pri...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/32H02P21/18
CPCH02P21/18H02P21/32
Inventor 刘雪冰李文杰周从源李杰张宸维李荫荣李坤鹏汪文江叶昌森吴鹏何俊许二超李高水张茂飞徐赟
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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