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Vector control method for multi-unit drive system based on indirect matrix converter

A matrix converter and multi-machine transmission technology, which is applied in vector control systems, electronic commutation motor control, motor generator control, etc., can solve the problems of limiting the application prospects of multi-machine transmission systems, large volume, short life, etc., to achieve Ensure current quality and speed regulation performance, reduce volume and weight, and reduce switching loss

Inactive Publication Date: 2012-07-18
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

These three structures actually use AC-DC-AC indirect power converters to drive the motor. Since the intermediate DC link of this structure is mostly composed of large-capacity electrolytic capacitors, it will inevitably bring a large volume to the system. , heavy weight, short life, high cost and a series of insurmountable weaknesses, which limit the application prospects of multi-machine transmission systems

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  • Vector control method for multi-unit drive system based on indirect matrix converter
  • Vector control method for multi-unit drive system based on indirect matrix converter
  • Vector control method for multi-unit drive system based on indirect matrix converter

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Embodiment Construction

[0019] 1. Multi-machine transmission system topology based on indirect matrix converter

[0020] The main circuit structure of the multi-machine transmission system based on the indirect matrix converter of 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 rectification stage circuit (3), clamping circuit (4), k three-phase bridge inverter stage circuits ( k is an integer greater than or equal to 2) (5), k asynchronous motors (6) and two DC buses. A three-phase bridge rectifier stage circuit composed of 6 bidirectional switches Sap-Scn (each bidirectional switch is composed of two power switch tubes and two antiparallel diodes in reverse series) 3. A clamp for suppressing voltage spikes Bit circuit 4 and k three-phase bridge inverter stage circuits 5 composed of single-phase switches (SAp-SCn) and freewheeling diodes are sequentially connected to both ends of the DC bus, and each ...

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Abstract

The invention discloses a vector control method for a multi-unit drive system based on an indirect matrix converter, and belongs to the field of converters of power electronics and electric drive control. The vector control method uses one indirect matrix converter to drive a plurality of asynchronous motors to perform speed governing operation by means of parallelly extending parallel extension of an inverter circuit of the indirect matrix converter. When the multi-unit drive system is under regular operation, a rectifying circuit and the inverter circuit both adopt a space vector pulse width modulation (SVPWM) method, all the inverter circuits of the system adopt a semi-symmetric pulse width distribution mode of nine section PWM, therefore output waveform quality and speed governing performance of the system are improved, and current conversion of switching elements is safe and convenient. The vector control method is adopted to achieve high-performance speed governing for the asynchronous motors. According to the vector control method, one matrix converter is used for driving the plurality of motors to operate, redundance of the drive system is increased, and power density of the speed governing system of the asynchronous motors driven by the matrix converter.

Description

technical field [0001] The invention relates to a control method of a power electronic converter, in particular to a topology structure and a vector control method for driving multiple motors by an indirect matrix converter. Background technique [0002] A simple electric drive system is mainly driven by an inverter to drive a motor to run with load and speed regulation. However, in many industrial applications such as textiles, papermaking, oil production, automobiles, and aerospace, most of them require multiple motors to run with load at the same time. , due to performance indicators, system redundancy, economic effectiveness and other requirements, multi-machine transmission systems are often used. The so-called multi-machine transmission system is to drive multiple motors to run with load and speed regulation through one or more power converters. There are mainly three types of topologies in the traditional multi-machine transmission system: one PWM rectifier generates...

Claims

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Application Information

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