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Insulation type converter and control method

An isolated and converter technology, applied in the direction of control/regulation systems, output power conversion devices, instruments, etc., can solve the problem of high switching noise and achieve the effect of wide input range

Inactive Publication Date: 2008-10-01
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Those skilled in the art know that the disadvantage of modulating the duty cycle to achieve the output voltage regulation of these isolated DC / DC and DC / AC converters is that when the above isolated DC / DC and DC / AC converters When operating at relatively high voltage, the switching noise is relatively large

Method used

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  • Insulation type converter and control method
  • Insulation type converter and control method

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Embodiment Construction

[0065] Please refer to FIG. 7 , which shows an isolated DC / DC converter with a duty ratio and frequency modulation device according to a first preferred embodiment of the present invention. The isolated DC / DC converter 5 with a duty cycle and frequency modulation device includes a DC / AC switching device 11, a duty cycle and frequency modulation device 51, a leakage inductance Lk, a transformer TR, a rectifier 13, an input Capacitance C I , blocking capacitance C B with output capacitor C O . Wherein the DC / AC switching device 11 is used to receive the DC input voltage V IN and outputting the first AC output voltage, which includes a first power switching module (including a first power switch Q1 and a first diode D1), a second power switching module (including a second power switch Q2 and a second diode D2 ) the third power switching module (including the third power switch Q3 and the third diode D3 ) and the fourth power switching module (including the fourth power switch...

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PUM

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Abstract

The present invention relates to an isolated direct current / direct current converter, an isolated direct current / direct current converter and a method for controlling the converter. The direct current / direct current converter comprises the following components: a direct current / alternating current switching device, a transformer, a rectifier and a duty ratio and frequency modulation device. The duty ratio and frequency modulation device is coupled between the rectifier and the switching device and is used for generating a driving signal and regulating the duty ratio and frequency of the switching device thereby stabilizing the direct current output voltage of the converter. Therefore, the invention stabilizes the alternating current output voltage of the converter through regulating the duty ratio and frequency of the converter, and can obtain the advantages of relatively broader input range of the direct current input voltage of the converter and relatively reduced alteration amount of the duty ratio and frequency.

Description

technical field [0001] The present invention relates to an isolated DC / DC converter and an isolated DC / AC converter, in particular to a device with duty cycle and frequency modulation (duty ratio and frequency modulating apparatus) isolated DC / DC converter and an isolated DC / AC converter with duty ratio and frequency modulating apparatus. Background technique [0002] Please refer to FIG. 1 , which is a schematic circuit diagram showing an isolated DC / DC converter with a frequency modulation device in the prior art. The known isolated DC / DC converter 1 with a frequency modulating device includes a DC / AC switching device (DC / AC switching device) 11, a frequency modulating apparatus (frequency modulating apparatus) 12, a rectifier 13, and an input capacitor C I , blocking capacitance (blockcapacitor) C B , leakage inductance (leakage inductor) Lk, transformer TR and output capacitor C O . Wherein, the DC / AC switching device 11 is used to receive the DC input voltage V IN ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335H02M7/5387
Inventor 张世贤
Owner DELTA ELECTRONICS INC
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