Switch power supply for chain type convertor power unit controller

A technology of power unit and switching power supply, which is applied in the direction of DC power input conversion to DC power output, control/regulation system, output power conversion device, etc., which can solve the difficulty of realizing high-voltage isolation of IGBT drive circuits and large differences between power supplies , Low power supply efficiency and other issues, to achieve the effect of reducing the probability of misoperation, small power loss, and saving power supply costs

Inactive Publication Date: 2010-06-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous chain-link converter scheme, the power supply of the power unit controller is basically realized by UPS power supply plus AC-DC (alternating current-direct current) rectification. Individual switching power supplies are used in combination, so the differences between the power supplies are large, the reliability is low, and it is difficult to realize the high-voltage isolation of each IGBT drive circuit.

Method used

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  • Switch power supply for chain type convertor power unit controller
  • Switch power supply for chain type convertor power unit controller
  • Switch power supply for chain type convertor power unit controller

Examples

Experimental program
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Embodiment Construction

[0035] The following is a description of the components and parts symbols in the accompanying drawings of the specific embodiment:

[0036] DC: DC input voltage positive

[0037] N: Negative pole of DC input voltage

[0038]VDC: DC input voltage (that is, the voltage across the last capacitor Cap4 of the power unit)

[0039] L11: DC smoothing inductor

[0040] C11: the first filter capacitor

[0041] C12: Second filter capacitor

[0042] Q1: The first MOSFET switch tube

[0043] D11: The first MOSFET switch tube Q1 has its own anti-parallel fast diode inside

[0044] Q2: The second MOSFET switch tube

[0045] D12: The second MOSFET switch tube Q2 has its own anti-parallel fast diode inside

[0046] C13: The first MOSFET switching tube snubber capacitor

[0047] C14: The second MOSFET switching tube snubber capacitor

[0048] Cr: resonant capacitance

[0049] T: Isolation Transformer

[0050] N1: primary winding

[0051] N21: first and second winding

[0052] N22: ...

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Abstract

The invention discloses a switch power supply for a chained converter power unit controller, which comprises 7 roads of output isolated with each other by high voltage, thus realizing that working power of the chained converter power unit controller and the IGBT driving power are supplied with power by one switch power supply, therefore, the cost of the power supply is saved. The switch power supply also makes use of the three-element LLC series connection resonant principle to realize the soft-switching process of a power switch pipe by resonant soft switching techniques and also uses parasitic parameters of an isolation transformer as elements of series connection resonant to reduce the consumption of the circuit switch power to the smallest, and the convertion efficiency is relatively the highest; besides, the output power can be regulated perfectly, which reduces the conduction loss of the switch pipes, improves the convertion efficiency of the switch power supply and prolongs theservice life of the switch elements.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a switching power supply applied to a chain-type converter power unit controller. Background technique [0002] Switching power supply is especially favored by electronic equipment manufacturers because of its low loss, small size, large number of output channels, and wide application. With the continuous update of technology, the pressure of energy and the deepening of the requirements for power quality, the market demand for miniaturized, low-loss, high-efficiency and energy-saving switching power supplies is increasing day by day. [0003] The basic technical requirements of electronic equipment for switching power supplies are high efficiency, high reliability, low cost, small size and light weight. In order to meet such requirements, the switching power supply needs to further increase the switching frequency, reduce its size, light weight, thin profile, and improve conversion ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M3/335H02M3/337H02M1/32H02H7/122
Inventor 倪喜军赵剑锋杨铭白杰闫安心
Owner SOUTHEAST UNIV
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