Lossless thyristor driving circuit

A thyristor drive, thyristor technology, applied in logic circuits, electrical components, pulse technology, etc., can solve problems such as power consumption and loss, and achieve the effects of reducing drive circuit loss, improving reliability, and reducing area
CN104202036AActive Publication Date: 2014-12-10EAST GRP CO LTD
4 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
EAST GRP CO LTD
Publication Date
2014-12-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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, thyristor driving methods are roughly divided into the following two types, one is external drive and the other is self-drive. Lossy high-frequency isolated pulse drive (hereinafter referred to as lossy drive) is widely used in the external drive mode. 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, D3 are the diodes and voltage regulator tubes for transformer remagnetization, R1 and R2 are the current limiting resistors, C1 is the pulse driving support capacitor, Q1 is Drive the triode, SCR_DRV is the driving signal of the thyristor.

[0003] Its circuit operation is divided into four stages:

[0004] Phase 1: When SCR_DRV is low, Q1 is turned off, driving the curren...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More