Indirect matrix converter-based multi-unit drive system and fault-tolerant control method thereof

A matrix converter, multi-machine transmission technology, applied in the direction of electronic commutation motor control, motor generator control, AC motor control, etc., can solve the problems of complex control methods, device damage, and reduce system reliability, and improve stability. Effects of Sexuality and Reliability

Inactive Publication Date: 2014-12-24
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the multi-machine transmission system based on the indirect matrix converter uses a large number of power semiconductor devices, and the control method is complicated, and it is easy to damage the device. Once a device fails, the entire system must be shut down for maintenance, which will greatly reduce the system. Reliability, but also bring huge economic losses

Method used

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  • Indirect matrix converter-based multi-unit drive system and fault-tolerant control method thereof
  • Indirect matrix converter-based multi-unit drive system and fault-tolerant control method thereof
  • Indirect matrix converter-based multi-unit drive system and fault-tolerant control method thereof

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Embodiment Construction

[0019] 1. Circuit topology of multi-motor drive system based on indirect matrix converter with auxiliary switch

[0020] The main circuit structure of the multi-machine transmission system based on indirect matrix converter with auxiliary switch in the present invention is as follows: figure 1 As shown, it includes input three-phase AC power supply (1), input LC filter (2), three-phase bridge rectifier circuit (3), clamping circuit (4), two three-phase bridge inverter circuits ( 5), an auxiliary switch (6), two asynchronous motors (7) and two DC buses. Among them, a three-phase bridge rectifier stage circuit (3) composed of six bidirectional switches Sap-Scn (each bidirectional switch is composed of two power switch tubes and two antiparallel diodes in reverse series) is used to suppress voltage spikes The clamping circuit (4) and two three-phase bridge inverter circuits (5) composed of single-phase switches (SAp-SCn) and freewheeling diodes are connected to the two ends of t...

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Abstract

The invention discloses an indirect matrix converter-based multi-unit drive system and fault-tolerant control method thereof, and belongs to the field of converters of power electronics and electric drive control. Auxiliary switches are inserted between a plurality of inverter circuits of the indirect matrix converter-based multi-unit drive system; by means of on-off control of the auxiliary switches, fault-tolerant operation of the system can be achieved through recombination of switching elements of the inverter circuits and minor cycle space vector pulse width modulation algorithm of all the inverter circuits when a single-phase fault happens to one or the plurality of the inverter circuits of the multi-unit drive system. According to the indirect matrix converter-based multi-unit drive system and the fault-tolerant control method thereof, continuous operation of the system is guaranteed when the inverter circuits have a disconnection or a phase loss fault; therefore the redundance of the indirect matrix converter-based multi-unit drive system is increased, and stability and reliability of the system are improved.

Description

technical field [0001] The invention relates to a control method of a power electronic converter, in particular to a fault-tolerant operation control method for driving multiple motors by an indirect matrix converter. Background technique [0002] The multi-motor transmission system based on the indirect matrix converter can simultaneously drive multiple motors to run with load. It has the advantages of simple topology, compact structure, easy implementation and high power density. In the field of industrial applications where the load is running and the space capacity is limited. [0003] However, the multi-machine transmission system based on the indirect matrix converter uses a large number of power semiconductor devices, the control method is complicated, and the damage of the device is easy to occur. Once a device fails, the entire system must be shut down for maintenance, which will greatly reduce the system. Reliability, but also bring huge economic losses. SUMMARY...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P27/08
Inventor 梅杨李正熙
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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