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Method and system for checking phase sequence of three-phase alternating current motor

A three-phase AC and phase-sequence technology, which is applied in the control system, generator control, motor control, etc., can solve the problems of three-phase AC motor failure, three-phase AC motor non-rotation, vibration or reversal, etc.

Active Publication Date: 2019-12-13
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the phase sequence of the three-phase current sensor is inconsistent with that of the three-phase AC motor, it will cause the three-phase AC motor to fail, resulting in the three-phase AC motor not rotating, shaking or reversing

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  • Method and system for checking phase sequence of three-phase alternating current motor
  • Method and system for checking phase sequence of three-phase alternating current motor
  • Method and system for checking phase sequence of three-phase alternating current motor

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, 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 making creative efforts belong to the protection scope of the present invention.

[0046] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by t...

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Abstract

The invention provides a method and a system for checking the phase sequence of a three-phase alternating current motor. The method comprises the steps that three-phase current corresponding to the motor controller of the three-phase alternating current motor is collected in real time; the quadrature axis voltage and the positive included angle are given, and the straight-axis voltage is adjusted;whether the phase sequences of the motor controller and the three-phase alternating current motor are consistent is determined through the three-phase current of the motor controller; and if the phase sequences are not the consistent, when the three-phase alternating current motor is in a current closed-loop mode, B-phase modulation waves and C-phase modulation waves are exchanged, and B-phase current and C-phase current are exchanged. According to the scheme, the quadrature axis voltage and the positive included angle are given; whether the phase sequence directions of the three-phase alternating current motor and the motor controller are consistent through the magnitude and direction of the three-phase current of the motor controller; the directions are not consistent, B-phase modulation waves and C-phase modulation waves are exchanged, and B-phase current and C-phase current are exchanged to complete phase sequence correction of the three-phase alternating current motor; and the phase sequence directions of the three-phase alternating current motor and the motor controller are consistent, so as to ensure stable operation of the three-phase alternating current motor.

Description

technical field [0001] The invention relates to the technical field of three-phase AC motors, in particular to a method and system for verifying the phase sequence of a three-phase AC motor. Background technique [0002] With the development of science and technology, three-phase AC motors are widely used in various fields. In the process of specific application of three-phase AC motors, it is very important to ensure the stable operation of three-phase AC motors. [0003] The motor controller of the three-phase AC motor includes a three-phase current sensor, and the phase sequences of the three-phase current sensor are A phase, B phase and C phase respectively. When performing current closed-loop control on a three-phase AC motor, in order to ensure the stable operation of the three-phase AC motor, phase A, phase B, and phase C are connected to phase U, phase V, and phase W of the three-phase AC motor, respectively. When the phase sequence of the three-phase current senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P29/032G01R29/18G01R31/34
CPCG01R29/18G01R31/34H02P21/14H02P29/032
Inventor 张磊李军营王冬高乐徐亚美
Owner WEICHAI POWER CO LTD
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