Isolated single-level double-Sepic inverter based on magnetic integration

An isolated inverter technology, applied in the field of isolated single-stage dual-Sepic inverters, can solve the problems of complex structure, unfavorable system magnetic integration design, huge number of switching devices, etc., to improve utilization efficiency, save quantity, Satisfy the effect of wide input voltage range

Inactive Publication Date: 2012-12-19
YANSHAN UNIV
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  • Abstract
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Problems solved by technology

There are also some research results of using other isolated DC / DC converters with buck-boost capabilities such as Cuk converters, Sepic converters and Zeta converters to form high-frequency isolated inverters, but the structures are relatively complicated, and the number of switching devices used Huge, and usually requires more than two transformers, which is not conducive to the magnetic integration design of the system

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  • Isolated single-level double-Sepic inverter based on magnetic integration
  • Isolated single-level double-Sepic inverter based on magnetic integration
  • Isolated single-level double-Sepic inverter based on magnetic integration

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0028] Isolated single-stage dual Sepic inverter based on magnetic integration, as attached figure 1 As shown, it consists of an input power supply, three switching tubes, two cut-off diodes, three inductors, two capacitors, a single-primary-side double-side transformer and an output load. It includes the input terminal 1 of the isolated Sepic circuit, the second An isolated Sepic circuit output terminal 2 and a second isolated Sepic circuit output terminal 3;

[0029] In the input terminal 1 of the isolated Sepic circuit, the first inductor L 1 One end of the power supply V i positive pole, the first inductor L 1 The other end of the first power switch tube S 1 the anode and the first capacitor C 1 One end of the first power switch tube S 1 The cathode is connected to the power supply V i The negative pole of the first capacitor C 1 The...

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Abstract

The invention discloses an isolated single-level double-Sepic inverter based on magnetic integration. The inverter comprises an input end 1 of an isolated Sepic circuit, an output end 2 of a first isolated Sepic circuit and an output end 3 of a second isolated Sepic circuit. A single-grade and single-phase inverter which can realize voltage increase and reduction inversion is built through two isolated Sepic convertors in an output parallel way, the integration of a plurality of magnetic elements of the inverter is realized through magnetic integration technology. The Sepic convertors in the circuit have voltage increasing and reducing functions, so that the input / output range is further expanded through the transmission rate of a high-frequency transformer, the requirement of wide input voltage range of a photovoltaic inverter can be met, and a voltage increase and reduction inversion function can be realized. The inverter is a novel inverter which meets the technical requirements of power generation from renewable energy sources and new energy sources and is suitable for occasions requiring a wide input voltage range and medium power.

Description

technical field [0001] The invention relates to an inverter in an electric energy conversion device, in particular to an isolated single-stage double Sepic inverter based on magnetic integration, which is applied in a single-phase inverter field capable of boosting and stepping down voltage. Background technique [0002] With the increasing depletion of non-renewable energy sources in the world, renewable energy generation such as solar power and wind power has gradually developed and even replaced traditional consumable energy generation, because these new energy sources are inexhaustible and have great impact on The environment has no pollution and other advantages. The inverter is the core component of renewable energy power generation equipment, which can not only provide power for AC loads directly, but also serve as an interface to transmit energy to the AC grid. Due to the randomness and uncertainty of the energy distribution of renewable energy, this also causes the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M3/335
Inventor 王立乔祝百年仇雷
Owner YANSHAN UNIV
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