Method and apparatus for compensating dead zone of two-stage matrix converter based on carrier modulation

Abstract

The invention discloses a dead zone compensation method and a device used for a two-stage matrix converter based on carrier modulation; the dead zone compensation method is put forward on the basis of analysis on the inverter dead zone effect during normal working condition of the two-stage matrix converter based on carrier modulation. The dead zone compensation method sufficiently considers the influence of switch device IGBT in the two-stage matrix converter, conduction voltage drop of freewheeling diode on the turn-on and turn-off delay time of switch element and the derived dead zone compensation formula has simple calculation process and is conveniently realized in engineering. The invention also provides a specific dead zone compensation device according to the dead zone compensation method. The device and the method can overcome the dead zone effect of the two-stage matrix inverter and gain more ideal output current.

Description

technical field The invention belongs to the technical field of power electronics, and relates to a dead zone compensation method and a device thereof for a two-stage matrix converter based on carrier modulation. Background technique Matrix converter is a research hotspot in the field of power electronics in the past ten years. It has many excellent characteristics, such as bidirectional energy flow, sinusoidal input and output current, controllable input power factor, and no need for large-capacity energy storage components. Small. Especially the two-stage matrix converter developed on the basis of the single-stage matrix converter in recent years, it not only has the excellent characteristics of the single-stage matrix converter, but also overcomes the huge clamping circuit of the single-stage matrix converter, The commutation control is complicated and other deficiencies, so it has become a kind of power converter with the most development potential at present. The com...

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Problems solved by technology

However, the current research on the dual-stage matrix converter does not involve its dead zone compensation, and by studying its working principle, it can be clearly known that the dead zone effect in the dual-stage matrix converter has a non-negligible impact on its performance. ; Therefore, it is necessary to compensate its dead zone effect to obtain an ideal output current

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