Double inverse stimulation inverter for diode clamp

Abstract

The present invention relates to a diode clamping dual-flyback inverter, which comprises a first flyback circuit and a second flyback circuit. The first flyback circuit and the second flyback circuit operate according to the subareas of the coordinates of output current and voltage, so as to realize the inverted output. The diode clamping dual-flyback inverter has the following advantages: the single-stage structure realizes the step-up inverted output, which reduces the size, weight and cost of the whole machine; the high-frequency electric isolation is realized; the whole circuit has fewer active-power devices; the circuit has a simple structure and low expense; the control proposal is simple and can be easily realized; the original polygonal voltage of the transformer is clamped within a certain range, which effectively inhabits the voltage peak of switches.

Description

1. Technical field [0001] The invention relates to a diode-clamped double-flyback inverter capable of realizing step-up inverter and high-frequency electrical isolation, belonging to an inverter in an electric energy conversion device. 2. Background technology [0002] The traditional inverter topology can almost be attributed to the buck-type step-down converter structure. In order to ensure the normal operation of the inverter, the bus voltage on the DC side must be greater than the peak output voltage. Taking the mains system as an example, the output is 220VAC, then The DC side bus voltage must reach at least 315VDC, which is unsatisfactory in most applications, so a DC / DC direct converter must be added before the inverter to boost the input voltage to the required DC side bus voltage. Compared with the single-stage structure, the two-stage structure of DC / DC straight-to-straight converter + DC / AC inverter increases the complexity of the system, increases the cost, incr...

AI Technical Summary

Problems solved by technology

[0002] The traditional inverter topology can almost be attributed to the buck-type step-down converter structure. In order to ensure the normal operation of the inverter, the bus voltage on the DC side must be greater than the peak output voltage. Taking the mains system as an example, the output is 220VAC, then The DC side bus voltage must reach at least 315VDC, which is unsatisfactory in most applications, so a DC / DC direct converter must be added before the inverter to boost the input voltage to the required DC side bus voltage

Compared with the single-stage structure, the two-stage structure of DC / DC straight-to-straight converter + DC / AC inverter increases the complexity of the system, increases the cost, increases the volume and weight of the whole machine, and reduces the overall power conversion efficiency

On the other hand, the DC side bus voltage of the traditional inverter may be lower than the instantaneous value of the required output voltage due to various reasons, which will cause the output voltage waveform to be distorted, and in severe cases, the converter will work abnormally or even burn out due to failure.

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