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Motor control system and control method for alternating current transmission system

A technology of motor control and AC drive, applied in the direction of AC motor control, motor generator control, control system, etc., can solve the problems of reducing system reliability, large physical volume, and difficult pulsation components

Active Publication Date: 2014-11-19
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0017] (1) Increase system cost, its physical volume is large, occupying system space;
[0018] (2) Reduce the reliability of the system to a certain extent;
[0019] (3) In engineering applications, it is difficult to achieve precise matching between L-C, especially when the system power is relatively large, it is difficult to fully eliminate the pulsation component

Method used

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  • Motor control system and control method for alternating current transmission system
  • Motor control system and control method for alternating current transmission system
  • Motor control system and control method for alternating current transmission system

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Embodiment Construction

[0088] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0089] In view of this, the object of the present invention is to provide a motor control system and control method of an AC drive system, which can eliminate the adverse effects of the DC bus voltage ripple on the motor control performance.

[0090] In the motor control system and control method of the AC drive system described in the embodiment of the present invention, considering the shortcomings of the traditional method of eliminating the second resonance of the bus voltage by adding an L-C loop, a soft compensation algorithm is used to replace the traditional method The L-C loop in the system can eliminate the adverse effect of the DC bus voltage pulsation on the motor control performance, and at the same time ensure that th...

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Abstract

The invention discloses a motor control system for an alternating current transmission system. The system predicts direct current bus voltage in the next on-off cycle according to an actually detected direct current bus voltage value, and corrects the switching time of an inverter in advance according to a predicted value to fulfill the aim of compensation. The invention also discloses a motor control method for the alternating current transmission system. The embodiment of the invention can eliminate the adverse impact of direct current bus voltage pulsation on motor control performance, and simultaneously ensures that the control performance of the system is unchanged.

Description

technical field [0001] The invention relates to the technical field of AC transmission systems, in particular to a motor control system and a control method of a single-phase power supply type AC transmission system. Background technique [0002] The AC drive system refers to a new type of drive system that takes the AC motor as the control object and adjusts the output torque and speed of the motor. Compared with the DC drive system, the AC drive system has good traction performance, high power factor, small size, light weight and reliable operation. The AC drive system is gradually replacing the DC drive system and is widely used in various fields of industrial production, national life and national defense. [0003] At present, the widely used AC drive system is a voltage type, which is generally composed of a control system, a main circuit and a control object. The main circuit includes the DC bus, DC support capacitors, and converters composed of power switching semic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P27/06H02P21/16
Inventor 刘可安尚敬刘勇刘良杰
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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