Absorption circuit of high-power electronic device

A technology of power electronic devices and absorbing circuits, which is applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of inconvenient installation, poor high temperature resistance, and limited ability to absorb ripples, etc., to reduce volume and reduce production costs , solve the effect of large volume

Inactive Publication Date: 2011-04-20
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The current absorbing resistors often use aluminum shell resistors, which have poor high temperature resistance, limited ripple absorbing ability, and are not easy to install.

Method used

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  • Absorption circuit of high-power electronic device
  • Absorption circuit of high-power electronic device
  • Absorption circuit of high-power electronic device

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Embodiment Construction

[0045] The snubber circuit adopted in the present invention is an RC snubber circuit, such as figure 2 shown. The RC snubber circuit has a good effect of suppressing the turn-off surge voltage, the circuit structure is simple, and the circuit cost is low. When the snubber circuit with this structure is applied to a high-power power electronic power device, the snubber resistance value must be small.

[0046] The snubber resistor designed in the present invention also plays the role of supporting and fixing the snubber capacitor as a resistive device. The design method of absorbing resistor is:

[0047] 1) Select the absorbing resistor material that can meet the requirements;

[0048] 2) Design the overall structure of the snubber resistor according to the resistance value determined by the snubber circuit, combined with the spatial layout of the snubber circuit, considering the flow path of the current on the snubber resistor, and minimizing the bending in the structure, so...

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Abstract

The invention belongs to the field of power electronics and particularly relates to an absorption circuit of a high-power electronic device. RC (Resistor-Capacitor) buffer absorption circuits are used as absorption circuits and are connected in parallel with the anode and the cathode of a direct-current bus bar; absorption resistors are made of heatproof high-resistance materials and are designed in pairs; holes are arranged at both ends of the absorption resistors and used for connecting, fixing and mounting; one end of each absorption resistor is connected with an absorption capacitor and the other end of the absorption resistor is fixed on the direct-current bus bar; the absorption capacitor is fixed by a pair of absorption resistors; and the absorption resistors have the functions of connecting an absorption circuit and fixing the absorption capacitor while being used as resistors. The application of the resistors made of materials of iron, chromium and aluminum greatly reduces the volume of the absorption resistors, reduces the cost, ensures high resistance power, flexible design of resistor structure and convenient connection with absorption capacitor, effectively reduces the stray inductance of the absorption circuit and has the function of fixedly installing the absorption circuit.

Description

technical field [0001] The invention belongs to the field of electric power, and in particular relates to a high-power power electronic device absorbing circuit. Background technique [0002] High-power converters usually use power electronic power devices such as large-capacity GTO, IGBT, and IGCT. There are inevitably stray inductances in the main circuit, and stray inductance will cause high surges during the shutdown process of power electronic power devices. Voltage, according to different situations need to install the corresponding absorption circuit. The absorption circuit is used to absorb the turn-off surge voltage of the power electronic power device and the reverse recovery surge voltage of the freewheeling diode. The snubber circuit generally consists of non-inductive snubber capacitors, snubber resistors (low inductance) and fast recovery diodes. A well-designed snubber circuit can not only effectively suppress the turn-off surge voltage of power electronic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32
Inventor 袁蒙王轩韩天绪杨武帝邓占锋
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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