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Zero-voltage soft-switching single-phase boost inverter and its control method

A control method and inverter technology, applied in the direction of electrical components, high-efficiency power electronic conversion, conversion of AC power input to DC power output, etc., can solve problems such as reverse recovery loss of anti-reverse diodes

Active Publication Date: 2021-08-20
NANTONG UNIVERSITY
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Problems solved by technology

[0003] In view of this, this application provides a zero-voltage soft-switching single-phase boost inverter, which can realize zero-voltage soft switching of two bridge arm lower tubes and one bridge arm upper tube, and effectively solve the traditional The problem of serious reverse recovery loss of the anti-reverse diode in the integrated inverter improves the conversion efficiency

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  • Zero-voltage soft-switching single-phase boost inverter and its control method

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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0042] figure 2 A schematic diagram of a circuit structure of a zero-voltage soft-switching single-phase boost inverter according to an embodiment of the present application is shown. As an exemplary and non-limiting embodiment, the zero-voltage soft-switching single-phase boost inverter includes a first bridge arm, a second bridge arm, a DC power supply U in , the first DC bus capacitor C dc1 , the second DC bus capacitor C dc2 , the firs...

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Abstract

The invention belongs to the technical field of inverters, and discloses a zero-voltage soft-switching single-phase boost inverter and a control method thereof. 1 , the first bridge arm, the second bridge arm and the first DC bus capacitor C dc1 , the second DC bus capacitor C dc2 with the second inductance L 2 Constitutes an auxiliary branch in which current can flow in both directions. In the positive half power frequency cycle, the first bridge arm works in SPWM mode, and the second bridge arm works in PWM mode; in the negative half power frequency cycle, the working states of the first bridge arm and the second bridge arm are reversed. The inverter realizes the zero-voltage soft switching of two lower tubes of the bridge arm and one upper tube of the bridge arm, and effectively solves the problem of serious reverse recovery loss of the anti-reverse diode in the traditional integrated inverter, and improves the conversion efficiency .

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a zero-voltage soft-switching single-phase boost inverter and a control method. Background technique [0002] In order to cope with the crisis of traditional fossil energy and environmental pollution, the renewable energy distributed power generation system has been vigorously developed in various countries in recent years. In these power systems, the input side is usually a photovoltaic cell, a fuel cell or a storage battery, and its output voltage is low and has a large fluctuation range. Therefore, distributed power generation systems generally adopt a two-stage structure of a DC / DC boost converter (such as Boost) cascaded with a voltage source inverter to meet the voltage requirements of the grid or AC load equipment. The two-stage boost inverter scheme can better adapt to the wide variation range of the input voltage, and the control is relatively simple, but ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387H02M7/5395
CPCH02M7/53871H02M7/5395H02M1/0051H02M1/0058Y02B70/10
Inventor 秦岭田民沈家鹏周磊王亚芳许兴高娟段冰莹马宇昂钱天泓付启康
Owner NANTONG UNIVERSITY
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