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Fault-tolerant full-bridge llc resonant converter based on half-bridge redundancy

A resonant converter, resonant technology, applied in the output power conversion device, the conversion of DC power input to DC power output, instruments, etc., to achieve the effect of high power density, low system cost, and improved power density

Active Publication Date: 2019-07-02
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the reconfigured half-bridge topology can only deliver at most half the rated power to the load with the same current stress components, so the system needs to be derated

Method used

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  • Fault-tolerant full-bridge llc resonant converter based on half-bridge redundancy
  • Fault-tolerant full-bridge llc resonant converter based on half-bridge redundancy
  • Fault-tolerant full-bridge llc resonant converter based on half-bridge redundancy

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Embodiment Construction

[0031] In order to describe the present invention more specifically, three full-bridge LLC resonant converters with fault-tolerant operation based on half-bridge redundancy and related working principles of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The primary structures of the three fault-tolerant full-bridge LLC resonant converters based on half-bridge redundancy are the same, including the first power switch S 1 , the second power switch tube S 2 , the third power switch tube S 3 , the fourth power switch tube S 4 , the fifth power switch tube S 5 , the sixth power switch tube S 6 , the first resonant inductance L r1 , the second resonant inductance L r2 , the first isolation transformer T 1 The primary winding N 11 , the second isolation transformer T 2 The primary winding N 21 , the first resonant capacitor C r1 , the second resonant capacitor C r2 ,Such as Figure 1...

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Abstract

A full-bridge LLC resonant converter with fault-tolerant operation based on half-bridge redundancy relates to a resonant converter. There is a full-bridge LLC resonant main circuit and a half-bridge LLC resonant redundant circuit; when working normally, the full-bridge LLC resonant main circuit provides energy to the load alone; Another power switch tube in the bridge arm where the faulty power switch tube is located, the full-bridge LLC resonant main circuit is transformed into a half-bridge LLC resonant circuit. At the same time, the half-bridge LLC resonant redundant circuit starts to work, and reconfigures with the main circuit to form a new resonant circuit with input in parallel and output in series. Because the two half-bridge LLC resonant circuits each provide half of the energy from the input to the output, the system can normally provide the rated voltage and power to the load under the condition that the current stress of the power switch tube remains unchanged.

Description

technical field [0001] The invention relates to a resonant converter, in particular to a class of high power density, low system cost, fault-tolerant operating full-bridge LLC resonant converter based on half-bridge redundancy. Background technique [0002] The full-bridge LLC resonant converter has been widely used in many different industries in recent years because the primary side power switch tube can realize zero-voltage soft switching, the secondary side diode can realize zero-current soft turn-off, the converter has low switching loss and high efficiency. in industrial applications. In the full-bridge LLC resonant converter, the power switch tube generally uses a metal-oxide semiconductor field-effect transistor (MOSFET) to increase the switching frequency as much as possible and reduce the system volume. Under the harsh electromagnetic working environment, the MOSFET may experience an unexpected short-circuit fault, causing the converter to shut down. However, in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/32
CPCH02M1/32H02M3/33569H02M1/0058H02M1/325Y02B70/10
Inventor 陈桂鹏卿新林邓焰陈銮李广地胡义华
Owner XIAMEN UNIV
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