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Power conversion system

A technology of electric energy conversion and electric power, which is applied in the direction of high-efficiency power electronic conversion, control/regulation system, output power conversion device, etc., and can solve the problem of high loss of power converter

Inactive Publication Date: 2017-05-03
CHICONY POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the control method of the aforementioned synchronous rectification unit has the characteristics of simple control, the output power of the power converter is constant regardless of whether the electronic device is operating in a light-load or non-light-load state, which makes the power converter light-weight in the electronic device. Increased losses during load operation

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Embodiment Construction

[0067] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0068] Please refer to figure 1 , which is a circuit block diagram of the power conversion system according to the first embodiment of the present invention. The power conversion system receives an input voltage Vi and generates multiple sets of output voltages Vo. exist figure 1In the power conversion system, the isolation transformer 30 is divided into a primary side and a secondary side. The isolation transformer 30 includes a primary winding 310 and secondary windings 320a-320d. The primary side of the power conversion system includes a full-bridge switching module 10, the resonant module 20, and the primary winding 310, and the secondary side of the power conversion system includes an output control device 40 and secondary windings 320a-320d coupled to the primary winding 310, wherein the output control The device 40 ...

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Abstract

A power conversion system comprises an isolation transformer, a resonant module, a switching module, and an output control device. The isolation transformer contains a primary winding and multiple secondary windings. There is at least one coupling distance between the secondary windings and the primary winding. The leakage inductance of the isolation transformer increases as the coupling distance increases. The resonant module is electrically connected to the primary winding and the switching module. The output control device contains a controller and multiple output control modules. The controller is electrically connected to the output control modules. Each output control module is electrically connected to one of the secondary windings. The controller drives at least one of the output control modules to output an operation power corresponding to one needed power according to the operation state of an electronic device.

Description

technical field [0001] The present invention relates to a power conversion system, in particular to a power conversion system capable of changing output power according to the operating state of an electronic device. Background technique [0002] Traditional rectifier circuits using diodes or Schottky diodes (Schottky diodes) have large forward conduction voltages, making the loss of the rectifier circuit the main loss of the power converter. Metal-oxide-semiconductor field-effect transistors have low on-resistance, short switching time, and high input impedance, making them the preferred rectifier element for low-voltage, high-current power converters. rectification technology produced. [0003] A conventional power converter with multiple outputs includes multiple sets of synchronous rectification units. When the electronic device is activated, the multiple sets of synchronous rectification units are simultaneously activated and output power to the electronic device. And...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M3/335
CPCY02B70/10
Inventor 萧永鸿徐皓德胡志宽萧正昌
Owner CHICONY POWER TECH CO LTD
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