Matrix converter comprising source damping filtering unit, and control method thereof

A matrix converter and damping filter technology, applied in the field of matrix converters, can solve the problems of increasing high-frequency noise, not being able to guarantee unit power factor, increasing system damping, etc.

Active Publication Date: 2014-10-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, these two methods can only improve the dynamic characteristics and suppress resonance, but cannot guarantee the unity power factor of the input side
There are also literatures that use PID c

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  • Matrix converter comprising source damping filtering unit, and control method thereof
  • Matrix converter comprising source damping filtering unit, and control method thereof
  • Matrix converter comprising source damping filtering unit, and control method thereof

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Embodiment Construction

[0035] The technical solutions of the present invention are described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0036] like Figure 4 As shown, the present invention discloses a matrix converter with a source damping filter unit, including an input power supply, an LC input filter unit, a switch matrix and a micro-processing unit, and the current provided by the input power supply is sequentially input to the LC input filter unit and the switch matrix through the LC input filter unit and the switch matrix. In the load, the micro-processing unit controls the input current waveform of the LC filter by controlling the resonance damping of the LC filter to obtain the expected output voltage, and distributes the pulses of each switch tube in the switch matrix according to the expected output voltage, Control the working state of each switch tube in the switch matrix. The microprocessor unit includes a phase-locked loop,...

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Abstract

The invention discloses a matrix converter comprising a source damping filtering unit. The matrix converter comprises an input power source, an LC input filtering unit, a switch matrix and a microprocessing unit. Currents provided by the input power source are input to a load successively through the LC input filtering unit and the switch matrix, the microprocessing unit, through control over the resonance damping of an LC filter, controls input current waveforms of the LC filter so as to obtain expected output voltages, and according to the expected output voltages, distributes pulses to each switch tube in the switch matrix to control the work state of each switch tube in the switch matrix. The invention also provides a control method of the matrix converter comprising the source damping filtering unit. The dynamic characteristic is improved, the power supply current harmonic wave content can be reduced, a power supply side is enabled to be always close to a unit power factor, and the efficiency of the matrix converter is improved. At the same time, resonance appearing in the LC filter is effectively inhibited, the total harmonic wave distortion rate of power supply currents is reduced, and the influence exerted by the matrix converter on a power network is decreased.

Description

technical field [0001] The invention relates to a matrix converter, in particular to a matrix converter with an active damping filter unit and a control method thereof. Background technique [0002] The main purpose of adding an LC filter to the input side of the matrix converter is to meet the requirements of electromagnetic compatibility and prevent the input end of the matrix converter from entering the power grid due to the burrs caused by the high-frequency switching of the switching device; filter out high-frequency voltage components in the power grid. , so as not to affect the output quality of the matrix converter. However, the LC filter is a second-order underdamped system. When the system contains harmonics close to the resonant frequency of the LC filter, the input current will be seriously disturbed, and even the system will not work properly. When analyzing the input filter of the matrix converter, on the premise that the three-phase input voltage is balanced ...

Claims

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Application Information

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IPC IPC(8): H02M5/22H02M1/12
CPCH02M1/126H02M5/297H02M1/0025
Inventor 陆松葛红娟徐媛媛许宇翔国海
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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