Resonance converter system with relatively great efficiency and controlling method thereof

A technology for resonant converters and control devices, which can be used in output power conversion devices, conversion equipment with intermediate conversion to AC, control/regulation systems, etc., and can solve problems such as large converter losses.

Active Publication Date: 2010-06-02
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, reducing the pulse width may lead to hard-switching of the switch on the primary side of the transformer, resulting in a large overall loss of the converter.

Method used

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  • Resonance converter system with relatively great efficiency and controlling method thereof
  • Resonance converter system with relatively great efficiency and controlling method thereof
  • Resonance converter system with relatively great efficiency and controlling method thereof

Examples

Experimental program
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Embodiment Construction

[0036] The method proposed by the present invention will be described below by taking the LLC resonant DC / DC and another DC / AC resonant converter in the resonant converter as an example.

[0037] FIG. 4( a ) is a schematic circuit diagram of an LLC resonant DC / DC converter system with a hybrid control device according to a first preferred embodiment of the present invention. The LLC resonant DC / DC converter system 1 with a hybrid control device includes a full bridge DC / AC switching device 11, a resonant circuit 12, a transformer Tr, a rectifier 13, a hybrid control device 14, an output Capacitance C o with a load R o , for receiving a DC input voltage V in and generate a DC output voltage V o . The full-bridge DC / AC switching device 11 includes a first switch Q 1 , electrically connected in parallel to a first diode D 1 with a first capacitor C 1 ; a second switch Q 2 , electrically connected in parallel to a second diode D 2 with a second capacitor C 2 ; a third sw...

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PUM

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Abstract

The invention discloses a resonant converter system and a control method of the same. The resonant converter system comprises a resonant converter for receiving an input voltage and outputting an output voltage, and a composite control device which is coupled with the resonant converter, is used to produce a drive signal and adjusts a phase angle and a frequency of the resonant converter when theresonant converter works in an abnormal state, so as to achieve lower voltage gain and less loss in a relatively easier way.

Description

technical field [0001] The present invention relates to a resonant converter system, in particular to a resonant converter system with a hybrid control apparatus. Background technique [0002] The development trend of DC / DC converters, like most power products, is towards high efficiency, high power density, high reliability and low cost. . Because the resonant converter usually adopts the pulse frequency modulation (Pulse Frequency Modulation, PFM) control method, it is relatively easy to realize the zero voltage switching of its switch, and it is easy to meet the high efficiency and high power density requirements of the converter, so it has been widely used. [0003] Although the resonant converter has the advantages of high conversion efficiency under normal working conditions, when it is working in abnormal conditions, such as when the line is started or the output current is limited, for the frequency converter that only uses frequency change There are still some pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M7/48H02M3/335H02M7/5387
Inventor 应建平叶益青言超曾剑鸿
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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