DC input low voltage DC output self excitation auxiliary power supply circuit of DC/DC topology

A technology of auxiliary power supply and DC input, applied in the direction of output power conversion devices, electrical components, and conversion equipment without intermediate conversion to AC, etc., can solve the problem of few researches on auxiliary power supply, and achieve self-excited start-up with wide-range input Requirements, high degree of modularization, and improved reliability

Inactive Publication Date: 2017-03-22
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The auxiliary power supply voltage input range studied in relevant literature or patents is mainly below 1000V, and there are few studies on auxiliary power supply with higher voltage and wider voltage input range

Method used

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  • DC input low voltage DC output self excitation auxiliary power supply circuit of DC/DC topology
  • DC input low voltage DC output self excitation auxiliary power supply circuit of DC/DC topology

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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0014] The invention provides a self-excited auxiliary power circuit with DC input and low voltage DC output of DC / DC topology, which is characterized in that it includes an auxiliary power main circuit and an auxiliary power control circuit, and the auxiliary power main circuit includes sequentially electrically connected start-up Circuit, pre-stage buck converter and post-stage converter; high-voltage DC voltage input start-up circuit, which outputs low-voltage DC voltage after being transformed by the pre-stage buck converter and post-stage converter; the post-stage converter includes parallel connection to the pre-stage buck converter The output voltage of the low-power power supply module is the control power supply of the aux...

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Abstract

The invention provides a DC input low voltage DC output self excitation auxiliary power supply circuit of the DC / DC topology. The power supply circuit comprises an auxiliary power supply main circuit and an auxiliary power supply control circuit, wherein the auxiliary power supply main circuit comprises a start circuit, a front-stage buck converter and a back-stage converter which are sequentially electrically connected, a high voltage dc voltage input start circuit through the front-stage buck converter and the back-stage converter outputs a low voltage dc voltage, the back-stage converter comprises a small-power power supply module and a large-power power supply module which are respectively connected in parallel with an output end of the front-stage buck converter, an output voltage of the small-power power supply module is a control power supply of the auxiliary power supply control circuit, and an output voltage of the large-power power supply module is taken as auxiliary power supply output. The power supply circuit is advantaged in that middle and high voltage high-capacity electric power electronic system control or driving circuit auxiliary power supply can be realized.

Description

technical field [0001] The invention belongs to the field of high-voltage self-excited auxiliary power supply, in particular to a DC / DC topology self-excited auxiliary power supply circuit with DC input and low-voltage DC output. Background technique [0002] With the continuous development and progress of social economy, the development and application of medium and high voltage and large capacity power electronic converters based on the combination of multiple standard module units or multi-phase multi-level topology are becoming more and more extensive. At present, the secondary circuit (mainly the drive and control circuit) of the power electronic converter is generally powered by an external low-voltage AC through rectification and step-down. For conventional small and medium-capacity power electronic converter devices, due to the compact and concentrated topology and hardware structure, this method is a simple, reliable and practical method for powering the secondary c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/36
CPCH02M1/36H02M3/07H02M1/007
Inventor 胡亮灯肖飞孙驰艾胜楼徐杰肖明恺
Owner NAVAL UNIV OF ENG PLA
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