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Starting control method and system and peak voltage detection circuit and method

A peak voltage, start-up control technology, applied in control/regulation systems, high-efficiency power electronic conversion, AC/pulse peak measurement, etc., can solve the problems of rectifier switch voltage spikes, switch current impact, poor accuracy, etc.

Active Publication Date: 2020-12-25
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is no pre-charging action, or the pre-charging control accuracy is poor, at the beginning of the slow start, the switch tube in the active clamp circuit will have a large current impact, and the rectifier switch tube may also have a large voltage spike.

Method used

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  • Starting control method and system and peak voltage detection circuit and method
  • Starting control method and system and peak voltage detection circuit and method
  • Starting control method and system and peak voltage detection circuit and method

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Embodiment Construction

[0065] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0066] When introducing elements / components / etc. described and / or illustrated herein, the terms "a", "an", "the", "said" and "at least one" are used to mean that there are one or more elements / components / etc. The terms "comprising", "including" and "having" are used in an open inclusive sense and mean that there may be additional elements / components / etc. besides the listed elements / components / etc. In addition, the terms "fi...

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PUM

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Abstract

The invention discloses a starting control method and system of a DC / DC converter and a peak voltage detection circuit and method. The starting control method is used for the starting process of the DC / DC converter from a low-voltage side to a high-voltage side, and comprises the following steps of: determining the duty ratio or frequency of a driving signal at least according to a peak voltage reference value and a peak voltage detection value of a switching tube on the low-voltage side; and outputting the driving signal to the switching tube so as to control the switching tube to act. According to the starting control method of the DC / DC converter, on the premise of ensuring that the voltage stress of the switching tube does not exceed the standard, the reverse charging power of the switching tube can be improved to the maximum extent during reverse starting, and the time required for charging a bus capacitor is shortened.

Description

technical field [0001] The invention relates to a switching power supply technology, in particular to a DC / DC converter start-up control method and system, and a switching tube peak voltage detection circuit and method. Background technique [0002] In a switching power supply, the voltage spike of a switch tube is an extremely important parameter, wherein the switch tube may include, for example, a diode (Diode) and a metal oxide semiconductor field effect transistor (MOSFET). Usually, the voltage spike needs to be less than the maximum allowable operating voltage of the switch tube, and a certain margin is left. If the maximum allowable operating voltage is exceeded, there is a risk of damage to the switch tube. Generally speaking, the switching power supply does not monitor the voltage spike of the switching tube, and it is difficult to test it in the production stage, so it is usually designed to ensure that the voltage spike is below the limit. [0003] For electric v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H02M1/088H02M3/335G01R19/04
CPCH02M1/36H02M1/088H02M3/33576G01R19/04H02M3/33573H02M3/33584H02M3/01H02M1/0025H02M1/342Y02B70/10
Inventor 王小磊朱鹏林健鹏吴海新孙浩
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD