Switching converter with wide input voltage range

A technology of switching converter and voltage range, which is applied in the direction of converting DC power input to DC power output, output power conversion device, and adjusting electric variables, etc., which can solve the problem of large loss in the auxiliary power supply branch and achieve the effect of eliminating loss

Active Publication Date: 2011-07-20
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a switching converter with a wide input voltage range, which can not only ensure that the switching converter can be started normally when the low voltage is inpu

Method used

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  • Switching converter with wide input voltage range
  • Switching converter with wide input voltage range
  • Switching converter with wide input voltage range

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Embodiment Construction

[0011] figure 2 As a specific embodiment of the present invention, the present invention improves the auxiliary power supply circuit on the basis of the prior art, a switching converter with a wide input voltage range, including a main power circuit, an output rectification and filtering circuit, a drive control module, an auxiliary Power supply circuit, the main power circuit is connected by the transformer and the switch tube, the auxiliary power supply circuit is connected between the input terminal of the converter power supply and the auxiliary winding of the transformer, through the auxiliary power supply circuit, the normal operation of the switching converter is realized in a wide input voltage range Start, and cut off the starting loop in the auxiliary power supply circuit after the switching converter works normally. Therefore, the loss generated by the auxiliary power supply circuit when the input voltage is high can be reduced, and the reliability of the switching...

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Abstract

The invention discloses a switching converter with a wide input voltage range, which comprises a main power circuit, an output rectifier filter circuit and a drive control module, wherein the main power circuit is formed by connecting a transformer and a switching tube. The switching converter is characterized by further comprising an auxiliary power supply circuit, wherein the auxiliary power supply circuit is connected between the power input end of the converter and an auxiliary winding of the transformer, realizes the normal starting of the switching converter in the wide input voltage range, and switches a starting circuit in the auxiliary power supply off after the switching converter works normally, thereby eliminating loss produced by the starting circuit in the auxiliary power supply circuit and improving the reliability of the switching converter at the same time of improving the efficiency of the switching converter.

Description

technical field [0001] The invention relates to the field of switching converters, in particular to a switching converter capable of realizing a wide input voltage range. Background technique [0002] The rapid development of power electronics technology makes the application fields of switching converters more and more extensive. Especially in recent years, with the vigorous development of new energy and power systems and other fields, the controller of its high-power converter system needs to use some switching converters as its auxiliary power supply, and these auxiliary power sources need to take power from the input of the converter system. The input voltage of these converter systems is usually very wide, such as from 100V to 1000V or even 3000V. Such a wide input voltage range brings many difficulties to the design of the auxiliary power supply. One of its difficulties is the auxiliary power supply of the switching converter itself as an auxiliary power supply. It ...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/36
Inventor 余凤兵
Owner MORNSUN GUANGZHOU SCI & TECH
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