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Unipolar combined rectifier type high-frequency isolating inverter and control circuit thereof

A high-frequency isolation and rectification circuit technology, applied in the control/regulation system, converting DC power input to DC power output, AC power input converting to DC power output, etc., can solve the problem of small heat generation, low heat dissipation requirements, and heavy weight and other problems, to achieve the effect of reducing the requirements of heat dissipation, shortening the working time and prolonging the service life

Inactive Publication Date: 2011-08-17
YANCHENG INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a two-stage conversion unipolar combined rectification high-frequency isolated inverter and its control circuit to overcome the shortcomings of the existing grid-connected inverters, which are large in size, heavy in weight and low in efficiency , has the characteristics of high efficiency, low calorific value, and low heat dissipation requirements

Method used

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  • Unipolar combined rectifier type high-frequency isolating inverter and control circuit thereof
  • Unipolar combined rectifier type high-frequency isolating inverter and control circuit thereof
  • Unipolar combined rectifier type high-frequency isolating inverter and control circuit thereof

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Embodiment Construction

[0041] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings and specific working processes.

[0042] Such as figure 1 As shown, the present invention discloses a unipolar combined rectification type high-frequency isolated inverter, including an input power supply U D , phase-shift control full-bridge inverter circuit 1, high-frequency isolation transformer 2, first rectifier circuit 3, second rectifier circuit 4 and second-order low-pass filter circuit 5, the following will describe their interconnection and components in detail illustrate.

[0043] The phase-shift control full-bridge inverter circuit 1 has bipolar sinusoidal pulse width modulation (SPWM) characteristics, including four switching tubes S1-S4 with anti-parallel diodes, where the source of the switching tube S1 is connected to the source of the switching tube S3 The drain is connected (in this embodiment, the gates of all the switching tubes ar...

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Abstract

The invention discloses a unipolar combined rectifier type high-frequency isolating inverter and a control circuit thereof. The high-frequency isolating inverter comprises an input power supply, a phase-shifted control full bridge inverter circuit, a high-frequency isolating transformer, a first rectification circuit, a second rectification circuit and a second-order lowpass filtering circuit, and the control circuit comprises a voltage sensor, an output voltage ring, a current sensor, an inductive current ring and a driving signal logic circuit. The control circuit generates a driving signalso as to control the first rectification circuit and the second rectification circuit in the inverter to work alternately. The circuit structure which adopts two-stage conversion can overcome the defects such as large size, heavy weight and low efficiency of the traditional synchronization inverter and has the advantages of high efficiency, low heat productivity and low requirement on heat dissipation.

Description

technical field [0001] The invention belongs to the field of converters and their controls, in particular to a unipolar combined rectification type high-frequency isolated inverter and its control circuit. Background technique [0002] Solar energy, wind energy, and fuel cells have received widespread attention as new clean energy sources, and distributed power generation technology using these energy sources has become an important part of the global energy sustainable development strategy. The circuit structure of the entire power generation system will have a crucial impact on the weight, volume, cost and efficiency of the system. For power generation systems with DC input such as photovoltaic cells and fuel cells, the usual circuit structures are: ① non-isolated single-stage grid-connected inverter; ② direct-direct (DC / DC) converter + inverter (DC / AC) + power frequency transformer; ③ DC / DC converter + high frequency isolated DC / AC inverter; ④ high frequency isolated DC / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M3/335H02M7/537
Inventor 阚加荣姚志垒吴云亚薛迎成吴冬春李小凡
Owner YANCHENG INST OF TECH
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