Control method and apparatus of AC-DC series resonance matrix converter

A matrix converter, AC-DC technology, used in output power conversion devices, conversion equipment that can be converted to DC without intermediate conversion, and irreversible AC power input converted to DC power output, etc. It can solve the problem of large amount of calculation. , the modulation algorithm is complex and inapplicable

Active Publication Date: 2014-03-19
SOUTHWEST JIAOTONG UNIV +3
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Problems solved by technology

These modulation algorithms are relatively complex, with a large amount of calculation, and more importantly, they cannot be applied to high-frequency (tens of kHz) output occasions.
The current commutation strategies of matrix converters are mainly divided into voltage-type and current-type commutatio

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  • Control method and apparatus of AC-DC series resonance matrix converter
  • Control method and apparatus of AC-DC series resonance matrix converter
  • Control method and apparatus of AC-DC series resonance matrix converter

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Embodiment Construction

[0061] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0062] For the series resonant converter, the load circuit composed of the output filter capacitor connected in parallel with the load is connected in series with the resonant circuit, the resonant current flows completely through the load circuit, and the output voltage is adjusted and stabilized by adjusting the resonant current. Since the resonant current flows completely through the resonant capacitor, and the capacitance voltage change is proportional to the current integral value, assuming that the current cycle time is basically constant in a steady state, then the average value of the current in each cycle is also proportional to the capacitance voltage change. The present invention uses Resonant capacitor voltage peak value (uc max ) is used as the control quantity to characterize the working state of the resonant circuit; the closed-loop control is b...

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Abstract

The invention relates to the matrix converter control technology and the high-frequency alternating-current link technology, particularly to a control method and apparatus of an AC-DC series resonance matrix converter for a high-voltage direct-current load. According to the method, a control strategy of switching of an excitation voltage from a low-wire voltage to a high-wire voltage and then to 0 voltage is used in the half period of a high-frequency current, thereby realizing three-voltage instantaneous composition; and thus the equivalent excitation voltage adjustment is realized and the average value of each phase of input wire current is in direct proportion to a phase voltage, and a high power fact and a low harmonic current are realized only by a small filtering inductance value. The provided method and the apparatus have the following beneficial effect: voltage-stabilizing outputting-based AC-DC series resonance matrix converter controlling with characteristics of high efficiency, high power factor, and low-harmonic and low-peak value current. And the method and the apparatus is especially suitable for the AC-DC series resonance matrix converter.

Description

technical field [0001] The invention relates to matrix converter control technology and high-frequency AC connection technology, in particular to a control method and device for an AC-DC series resonant matrix converter for high-voltage direct current loads. Background technique [0002] High voltage DC power supplies are widely used in continuous wave and long pulse modulator high power microwave systems. In order to meet the military needs of future high-tech warfare, high-power microwave systems are developing in the direction of high power, miniaturization, and light weight, which requires their power supplies to have higher power density, efficiency, and power factor. At present, the commonly used power supply generally adopts DC-Link technology with an intermediate DC energy storage link. The existence of the intermediate energy storage link will inevitably increase the volume and weight of the power supply system and reduce the power density of the power supply; in ad...

Claims

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Application Information

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IPC IPC(8): H02M7/02H02M5/22H02M1/42H02M1/12H02M1/14
CPCY02B70/126Y02B70/10Y02P80/10
Inventor 张政权刘庆想李伟
Owner SOUTHWEST JIAOTONG UNIV
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