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Single-phase single-stage boost inverter capable of realizing soft switching and control method

A control method and inverter technology, which are applied in the fields of climate sustainability, output power conversion device, AC power input conversion to DC power output, etc., and can solve problems such as difficulty in optimizing the design of input inductance and inability to apply inverters, etc.

Active Publication Date: 2021-08-20
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the former control mode, it is difficult to optimize the design of the input inductance, and under the latter control mode, the inverter cannot be applied to occasions with constant power such as independent inverter and photovoltaic power generation.

Method used

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  • Single-phase single-stage boost inverter capable of realizing soft switching and control method
  • Single-phase single-stage boost inverter capable of realizing soft switching and control method
  • Single-phase single-stage boost inverter capable of realizing soft switching and control method

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Embodiment Construction

[0036] 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.

[0037] image 3 A schematic diagram of a circuit structure of a single-phase single-stage boost inverter capable of realizing soft switching according to an embodiment of the present application is shown. As an exemplary and non-limiting embodiment, the single-phase single-stage boost inverter capable of soft switching includes a first DC bus capacitor C dc1 , the second DC bus capacitor C dc2 , DC power supply U in , the first inductance L...

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Abstract

The invention belongs to the technical field of inverters, and discloses a single-phase single-stage boost inverter capable of realizing soft switching and a control method. The inverter includes a boost bridge arm, an inverter bridge arm, and two diodes. , two boost inductors, two DC bus capacitors, one filter capacitor and one filter inductor. The booster arm always works in PWM mode, the inverter bridge arm always works in SPWM mode, its input current is continuous, can be controlled by PWM, has a high boosting capacity, and realizes the first switching tube S 1 and the second switch tube S 2 The zero-voltage soft switching effectively improves the conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a single-phase single-stage boost inverter capable of realizing soft switching 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 DC / DC boost converters (such as Boost) cascaded with voltage source inverters 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 rela...

Claims

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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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