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Lossless thyristor drive circuit

A thyristor drive and thyristor technology, applied in logic circuits, electrical components, pulse technology, etc., can solve problems such as loss and power consumption, and achieve the effects of improving reliability, reducing drive circuit loss, and reducing area

Active Publication Date: 2017-07-18
EAST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] From the above analysis, it can be seen that current flows through R1 in stages 1, 2, 3, and 4, and serious power consumption is generated in R1, and the remagnetization of the transformer in stage 4 is carried out by absorbing energy through the voltage regulator tube D3, so This other drive circuit is lossy drive

Method used

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  • Lossless thyristor drive circuit
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  • Lossless thyristor drive circuit

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Embodiment Construction

[0018] The following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] In the following description, many specific details are explained in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

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Abstract

The invention discloses a lossless thyristor driving circuit, and relates to the technical field of thyristor driving circuits. The lossless thyristor driving circuit comprises a thyristor Qa, a resistor R2, a rectifying diode D1, triodes Q1-Q3, diodes D2-D4, a resistor R1, resistors R3-R4, a capacitor C1 and a transformer T, wherein lossless driving is completely realized on the primary side of the transformer in the driving circuit. Compared with a lossy driving circuit (Fig. 2), the driving circuit is additionally provided with a VCC2 power supply of which the value is lower than that of VCC1. The VCC1 is used for providing peak driving current for the thyristor, and the VCC2 is used for providing platform driving current for the thyristor. The VCC2 can be obtained by using the VCC1 and a simple switch step-down chip. Through the driving circuit, the driving circuit loss, the demand of power supply power, the driving cost and the temperature of the driving circuit are lowered effectively, the area of a thyristor driving plate is reduced, and the reliability of the driving circuit is improved.

Description

Technical field [0001] The invention relates to the technical field of thyristor drive circuits, in particular to a lossless thyristor drive circuit. Background technique [0002] At present, the thyristor driving methods are roughly divided into the following two types, one is external drive and the other is self-driven. The other driving method is widely used in lossy high-frequency isolation pulse driving (hereinafter referred to as lossy other driving). The principle block diagram is as follows figure 2 Shown. Qa is the driven thyristor, T is the high-frequency isolation transformer, D1 is the rectifier diode, D2 and D3 are the diodes and zener tubes for transformer remagnetization, R1 and R2 are current-limiting resistors, C1 is the pulse drive support capacitor, and Q1 is Drive the transistor, SCR_DRV is the drive signal of the thyristor. [0003] The circuit work is divided into four stages: [0004] Phase 1: When SCR_DRV is low, Q1 is turned off and the drive current reach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/082
Inventor 崔彬余仕君谢文贵
Owner EAST GRP CO LTD
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