Fixed off-time peak current pulse sequence control method and device

A technology of fixed off time and pulse sequence, which is applied in the direction of control/regulation system, output power conversion device, electrical components, etc., to achieve the effect of eliminating low frequency fluctuation phenomenon and stable and reliable control
CN103326546BInactive Publication Date: 2015-10-14SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2015-10-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a switching converter fixed turn-off time peak current type pulse sequence control method and a switching converter fixed turn-off time peak current type pulse sequence control device. The output voltage value detected at a starting moment of a switching period determines turn-off time in the switching period, and conduction time of a switching tube is determined together by inductive current and the inductive current limit value. The fixed turn-off time peak current type pulse sequence control method and the fixed turn-off time peak current type pulse sequence control device can be applied to DCM and CCM switching converters. The fixed turn-off time peak current type pulse sequence control method and the fixed turn-off time peak current type pulse sequence control device have the advantages of being stable and reliable in control, and capable of possessing the current limiting function and avoiding the low-frequency fluctuation phenomenon probably existing in pulse sequence control from a source.
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Description

technical field

[0001] The invention relates to an electronic switching device, especially a control method and device for a switching converter. Background technique

[0002] The switching converter is an energy conversion device, which converts the input energy into energy suitable for the output requirements through appropriate conversion. Switching converters are widely used in real life because of their outstanding advantages such as small size, light weight, high conversion efficiency, and high power density. In people's daily life, switching converters are ubiquitous, such as computer adapters, battery chargers, etc. The switching converter is composed of two parts: the main circuit of the power converter and its control circuit. The main circuit completes energy conversion and transmission, while the control circuit ensures the stable operation of the main circuit and the energy conversion can meet the output requirements. For the same main circuit, the use of diff...

Claims

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