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Power supply with high efficiency and high power density

A high-power density and high-efficiency technology, applied in output power conversion devices, conversion of DC power input to DC power output, electrical components, etc., can solve the problems of step-down conversion circuit power loss and difficulty in further improving power supply efficiency.

Active Publication Date: 2012-10-17
VERTIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a step-down conversion circuit will also cause power loss, so it is difficult to further improve the efficiency of the entire power supply

Method used

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  • Power supply with high efficiency and high power density
  • Power supply with high efficiency and high power density
  • Power supply with high efficiency and high power density

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Experimental program
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Embodiment Construction

[0023] Such as figure 1 As shown, the high efficiency and high power density power supply of the present invention includes a step-down conversion circuit 100 , an interleaved parallel resonant circuit 200 and a switching module 300 . Wherein the step-down conversion circuit 100 and the interleaved parallel resonant circuit 200 are connected in series, and the switching module 300 is connected between the step-down conversion circuit 100 and the interleaved parallel resonant circuit 200 . The switching module 300 receives a control signal, and is turned on or off based on the control signal, so as to short circuit or turn on the step-down conversion circuit 100 .

[0024] When the power supply needs to work in the core region (for example, when half-load efficiency is required to be high), a control signal for controlling its conduction is sent to the switching module 300 . The step-down conversion circuit 100 is short-circuited, the input voltage is directly applied to the i...

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PUM

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Abstract

The invention relates to a power supply with high efficiency and high power density. The power supply comprises a pre-level topology circuit and a secondary topology circuit in series, and the power supply with high efficiency and high power density further comprises a switch module connected between the pre-level topology circuit and the secondary topology circuit. The switch module is used for connecting or breaking the pre-level topology circuit to short out or switch on the pre-level topology circuit based on a control signal. Through shorting out or switching on the pre-level topology circuit by the switch module, the power supply with high efficiency and high power density makes the pre-level topology circuit stop operating in some preset conditions to reduce loss and further improve the efficiency. While in some other preset conditions, operation of the pre-level topology circuit achieves the high power density, so that the high power density and the high efficiency are balanced.

Description

technical field [0001] The invention relates to the field of switching power supplies, more specifically, to a high-efficiency and high-power-density power supply. Background technique [0002] With the development of switching power supply technology, high frequency, high efficiency and high power density have become the development trend of switching power supply. High frequency can effectively reduce the volume of switching power supply, but too high frequency will cause the problem of increased switching tube loss, which is not conducive to improving the efficiency of the power supply. As a special circuit topology, the interleaved parallel resonant circuit can not only meet the requirements of high frequency, but also achieve high conversion efficiency. Driven by the development trend of high efficiency, it has been widely adopted in the industry. [0003] In order to achieve high power density, a step-down conversion circuit plus an interleaved parallel resonant circu...

Claims

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Application Information

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IPC IPC(8): H02M3/34H02M3/335
Inventor 刘慧
Owner VERTIV CORP