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Single-stage single-phase voltage type converter with series magnetically integrated switch inductance-capacitance network

An inductive-capacitance network, single-phase voltage technology, applied in the direction of adjusting electrical variables, output power conversion devices, converting DC power input to DC power output, etc., can solve the problem of insufficient boost ratio, decreased system utilization, and power generation systems. Difficulty functioning properly

Inactive Publication Date: 2018-06-08
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this type of inverter works normally, the DC side voltage must be greater than the peak value of the AC side phase voltage, so there is an obvious defect: when the DC side voltage (such as the output capacity of photovoltaic cells) decreases, such as rainy days or nights, the entire power generation The system will be difficult to run normally, and the utilization rate of the system will drop
This is to effectively overcome the shortcomings of traditional PWM converters such as the dead time of the bridge arm, the boost ratio is not large enough (non-isolated), the volume and weight of the system, and the high cost (input or output plus single-phase power frequency transformer) and other defects. , improve the output waveform quality and reliability of the conversion system and reduce the EMI on the input side, broaden the theory of power electronics conversion technology and renewable energy power generation technology, promote the development of new energy power generation industry and develop an energy-saving and conservation-oriented society. significance

Method used

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  • Single-stage single-phase voltage type converter with series magnetically integrated switch inductance-capacitance network
  • Single-stage single-phase voltage type converter with series magnetically integrated switch inductance-capacitance network
  • Single-stage single-phase voltage type converter with series magnetically integrated switch inductance-capacitance network

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Embodiment Construction

[0052] The technical solution 1 of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0053] A single-stage single-phase voltage-type DC-AC converter with a series magnetically integrated switch inductive network is composed of an input DC power supply, a single-phase high-frequency combination modulation switch, a single-phase filter and a single-phase AC load. And between the input DC power supply and the single-phase high-frequency combination modulation switch, there is a magnetic integrated switch inductive capacitance network in series; the magnetic integrated switch inductive capacitance network is formed by the energy storage inductance L 0 It is composed of two identical SLCC two-port switch inductive network units cascaded in sequence; each SLCC two-port switch inductive network unit is composed of a power diode S j , an energy storage inductor L j , two storage capacitors C j and C j ′ constitute...

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Abstract

A single-stage single-phase voltage type converter with a series magnetically integrated switch inductance-capacitance network is composed of an input DC power supply or a single-phase AC power supply, a high-frequency combined modulation switch, a filter and a single-phase AC load or a DC load, which are cascaded in sequence. A magnetically integrated switch inductance-capacitance network is connected in series between the input power supply and the high-frequency combined modulation switch. The magnetically integrated switch inductance-capacitance network is composed of energy storage inductors and two identical sequentially-cascaded SLCC two-port switch inductance-capacitance network units, which are cascaded. The magnetic integration structures of the three energy storage inductors areas follows: the three inductors are magnetically coupled, the three inductors are magnetically decoupled, and one inductor is magnetically coupled to the other two inductors. The three structures respectively adopt an EE magnetic core, a four-column magnetic core and an EE magnetic core. The converter can convert unstable wide-range low-voltage DC power or single-phase AC power into stable and high-quality single-phase sinusoidal AC power or DC power in a single stage and efficiently, and is suitable for small- and medium-capacity power conversion occasions.

Description

technical field [0001] The invention relates to a single-stage single-phase voltage-type converter with a series magnetic integrated switch inductive network, which belongs to the power electronic technology. Background technique [0002] A converter is a static converter device that uses power semiconductor devices to convert direct current or alternating current into alternating current or direct current, for use with alternating current loads (including grid-connected power generation with an alternating current grid) or direct current loads. [0003] Due to the increasing shortage of fossil energy (non-renewable energy) such as oil, coal and natural gas, serious environmental pollution, global warming, nuclear waste and environmental pollution caused by nuclear energy production, energy and the environment have become major issues facing mankind in the 21st century. . Renewable energy (green energy) such as solar energy, wind energy, hydrogen energy, tidal energy, and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M5/293H02M7/219H02M7/5387H02M1/14
CPCH02M1/14H02M3/158H02M5/293H02M7/219H02M7/5387H02M1/0064
Inventor 陈道炼
Owner QINGDAO UNIV
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