Forward-flyback isolated type boost inverter realized by coupling inductors and application thereof

A coupled inductance, forward and flyback technology, applied in the direction of adjusting electrical variables, converting equipment with intermediate conversion to AC, converting DC power input to DC power output, etc. , Affect the power level of the system and other issues, to achieve the effect of improving the power level, evenly distributing the loss, and improving the utilization rate

Active Publication Date: 2010-05-05
HOYMILES POWER ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. In this scheme, the forward transformer only transfers energy to the secondary side when its corresponding switch tube is turned on, while the flyback transformer only transfers energy to the secondary side when its corresponding switch tube is turned off, resulting in low utilization of the transfo

Method used

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  • Forward-flyback isolated type boost inverter realized by coupling inductors and application thereof
  • Forward-flyback isolated type boost inverter realized by coupling inductors and application thereof
  • Forward-flyback isolated type boost inverter realized by coupling inductors and application thereof

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Embodiment Construction

[0056] see figure 1 , the coupled inductor of the present invention realizes the forward and flyback isolated active clamping interleaved parallel boost converter, including two parts of the primary side circuit and the secondary side circuit,

[0057] figure 1 The primary side circuit has two branches connected in parallel with the power supply. Taking the first branch as an example, the first primary side winding L 1a and the first power switch S with anti-parallel diode 1 constituted in series, the first active clamping circuit is connected in parallel with the first power switch tube S 1 On the source and drain, the first active clamping circuit consists of an anti-parallel diode D c1 The first auxiliary switch tube S c1 and the first clamp capacitor C c1 Composed in series.

[0058] The specific connection is as follows: the first power switch tube S in the primary side circuit 1 in antiparallel with the diode D 1 Anti-parallel connection, the second power switch ...

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PUM

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Abstract

The invention discloses a forward-flyback isolated type boost inverter realized by coupling inductors and application thereof, comprising two power switch tubes, two auxiliary switch tubes, four anti-parallel diodes, a switch tube parallel capacitor, two clamp capacitors, two switch capacitors, two output diodes and two coupling inductors respectively provided with two windings. The invention realizes zero-voltage switching on of the power switch tubes through the resonance of the leakage inductance of the two coupling inductors and the switch tube parallel capacitor, absorbs the voltage peak switched off by the switch tubes caused by the leakage inductance and realizes energy lossless transfer by utilizing a clamp circuit comprising the anti-parallel diodes of the switch tubes and the two clamp capacitors, realizes the high gain output of the inverter by utilizing the serial connection of the second windings of the two coupling inductors, further improves the gain of the inverter and lowers the output voltage stress of the diodes by utilizing the switch capacitors and realizes the output zero-current switching off of the diodes by utilizing the leakage inductance of the coupling inductors.

Description

technical field [0001] The invention relates to a DC-DC converter and its application, in particular to a forward and flyback isolated active clamp interleaved parallel boost converter and its application. Background technique [0002] In recent years, energy shortage and environmental pollution have become the focus of the world, and the development and application of renewable energy have attracted widespread attention from all over the world. In the renewable energy power generation system, the electric energy generated by many renewable energy sources is low-voltage direct current, and high-voltage direct current is required for power transmission to the grid, so a DC-DC converter is required to convert low-voltage direct current into suitable and At the same time, due to the consideration of personal safety, many applications have requirements for electrical isolation. Therefore, isolated converters with low input ripple, high gain, and high efficiency play an importan...

Claims

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Application Information

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IPC IPC(8): H02M3/28H02M3/335
Inventor 何湘宁赵一李武华
Owner HOYMILES POWER ELECTRONICS INC
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