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Cascade active voltage-stabilizing controller of power switch

A control device, series voltage equalization technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of poor consistency and controllability of voltage equalization, large power loss of voltage equalization resistors, etc., and achieve dynamic voltage equalization fluctuations The effect of small range, strong pressure equalization control ability, and small dynamic loss

Inactive Publication Date: 2009-08-19
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since the leakage current flowing through the parallel resistors is 5 to 10 times the leakage current of the power module, a better static voltage equalization effect can be achieved, so the power loss of the voltage equalization resistors is relatively large
RC or RCD snubber circuit can contribute to dynamic voltage equalization, but it belongs to passive control, and the consistency and controllability of voltage equalization are not good

Method used

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  • Cascade active voltage-stabilizing controller of power switch
  • Cascade active voltage-stabilizing controller of power switch
  • Cascade active voltage-stabilizing controller of power switch

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Embodiment Construction

[0019] see figure 1 , for each power module working in series, an active voltage equalization absorption module M1 is provided, and the active voltage equalization absorption module M1 is connected in parallel across each main power tube V i-j The terminals C and E, where i=1~n; j=1~2; the driving control module M2 is set, and the output control signals of the driving control module M2 are respectively connected to each power module and the active voltage equalization absorbing module M1.

[0020] see figure 2 In the active voltage equalizing module M1, the discharge power tube V2 is set, the E terminal of the discharge power tube V2 is connected to the E terminal of the main power tube, and the C terminal of the discharge power tube V2 is connected to the recovery diode D2 through the discharge resistor R1 Reverse end, connect the forward end of the fast recovery diode D2 to the main power tube V i-j The C terminal of the fast recovery diode D2 is connected across the reve...

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Abstract

The active series voltage equalization control device of the power switch is characterized in that for each power module working in series, an active voltage equalization absorption module is provided, and the active voltage equalization absorption module is connected in parallel across C, Terminal E: a drive control module is set, and the output control signals of the drive control module are respectively connected to each power module and the active voltage equalization absorption module. The invention adopts active control, and has the advantages of low power consumption, reliable voltage equalization, strong discrete adaptability of power switches, simple circuit and the like.

Description

technical field [0001] The invention relates to a power protection device, more specifically a protection device for medium and high voltage power converters applied in the field of power electronics and electric drive. Background technique [0002] With the rapid development of modern industrial technology and computer technology, the medium and high voltage power conversion system centered on high-power power electronic full-control devices is widely used in high-voltage direct current transmission and reactive power compensation, high-power electric drive, large-scale wind power generation and large-scale solar photovoltaic power generation, etc. It has been widely used in the system and has become the key equipment in energy saving and new renewable energy systems. However, the main circuit power switching devices of the existing medium and high voltage power conversion systems are sometimes difficult to meet the voltage and power requirements of the system. The series ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/10H02H7/22
Inventor 张国荣苏建徽茆美琴汪海宁张健杜燕
Owner HEFEI UNIV OF TECH
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