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A fault-tolerant control method for primary permanent magnet linear motor traction system

A permanent magnet linear motor, traction system technology, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve problems such as the decline of output thrust capacity, and achieve the effect of optimal control and large thrust output capacity

Active Publication Date: 2021-04-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traction motor has a phase loss fault, the faulty motor is usually cut off from the system, which leads to a significant drop in the output thrust capability of the system, which is not conducive to the operation of the system under harsh terrain conditions

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  • A fault-tolerant control method for primary permanent magnet linear motor traction system
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  • A fault-tolerant control method for primary permanent magnet linear motor traction system

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Embodiment Construction

[0048] The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0049] A fault-tolerant control method of a primary permanent magnet linear motor traction system according to the present invention, the flow chart is as follows figure 1 shown. The system hardware structure of the embodiment of the present invention is as figure 2 As shown, it includes: two three-phase traction converters, two three-phase primary permanent magnet linear motors, and two AC contactors. figure 2 (a) In normal operation mode, both contactors 1 and 2 are closed; figure 2 (b) It is a single-motor operation mode, C1 phase is open, contactor 1 is disconnected, and contactor 2 is closed; figure 2 (c) is the operation mode of minimum copper loss and maximum thrust, phase C1 is open, and contactors 1 and 2 are closed.

[0050] The fault-tolerant control method under the open circuit fault of the motor winding of the primary pe...

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Abstract

The invention discloses a fault-tolerant control method for a primary permanent magnet linear motor traction system under the open-circuit fault of the motor winding. The traction system consists of two three-phase traction converters, two three-phase primary permanent magnet linear motors and two AC motors. It is composed of contactors. When both motors are fault-free, the system works in normal operation mode, and the two motors jointly provide thrust for the system; when an open-circuit fault occurs in any phase winding of the two motors, the system can work in three different Under the fault-tolerant operation mode, including single-motor operation mode, minimum copper consumption operation mode, and maximum thrust operation mode, the specific fault-tolerant operation mode is determined by the real-time load of the system. The control method involved in the invention can realize the uninterrupted fault-tolerant operation of the system under the open-circuit fault of the single-phase winding of the motor, and at the same time, it can quickly switch in different operation modes, and has good robustness.

Description

technical field [0001] The invention belongs to the technical field of motor drive and control, and in particular relates to a fault-tolerant control method of a primary permanent magnet linear motor traction system. Background technique [0002] The electric locomotive is the carrier of rail transit, and the traction system is obviously the "heart" unit of the electric locomotive to realize the mutual conversion of electromechanical energy. At present, the vast majority of urban rail transit vehicles are of the steel wheel and rail type, which rely on the interaction force between the wheel and the rail regardless of the operating conditions. When the traction force of the moving wheel set is greater than the maximum adhesion force, the wheel set will idling, resulting in a decrease in the traction force of the moving train, and high-speed idling will cause serious scratches on the tread surface of the wheel set and cause major accidents. Therefore, the rotary motor tracti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/028H02P5/74H02P21/00H02P25/064B60L3/00
CPCB60L3/0061B60L2200/26H02P5/74H02P21/00H02P29/028H02P2207/05H02P25/064Y02T10/64
Inventor 王伟石岩程明
Owner SOUTHEAST UNIV