High-voltage series silicon controlled rectifier dual-power-supply triggering system

Abstract

The invention relates to a high-voltage series silicon controlled rectifier dual-power-supply triggering system which comprises a full-bridge rectifying circuit, a voltage stabilizing circuit, a voltage conversion circuit, a triggering circuit, a steady-state power supply circuit, a transient-state power supply circuit and a silicon controlled rectifier interface. The full-bridge rectification circuit rectifies the voltage in the high-voltage cable into an original voltage; the voltage stabilizing circuit performs voltage stabilizing operation on the original voltage to obtain a transient power supply voltage; the voltage conversion circuit performs voltage conversion on the transient power supply voltage to obtain a steady-state power supply voltage smaller than the transient power supply voltage; the transient power supply circuit transmits the transient power supply voltage to the triggering circuit, and the steady-state power supply circuit transmits the steady power supply voltage to the triggering circuit, so that the triggering circuit triggers the silicon controlled rectifier through the silicon controlled rectifier interface. By the adoption of the technical scheme, the steady-state power supply voltage smaller than the transient-state power supply voltage is used for supplying power to the triggering circuit, the resistance power in the triggering circuit can be reduced, and therefore the overall trigger power can be reduced, and energy saving is achieved.

Description

technical field [0001] The invention relates to the technical field of thyristor triggering, in particular to a high-voltage serial thyristor dual-power triggering system. Background technique [0002] With the rapid development of power electronics technology, silicon controlled rectifier soft start device came into being. Thyristor is the abbreviation of thyristor, also known as silicon controlled rectifier. Thyristor has the characteristics of a silicon rectifier device, can work under high voltage and high current conditions, and its working process can be controlled, and is widely used in controllable rectification, AC voltage regulation, non-contact electronic switch, inverter and frequency conversion and other electronic circuits. [0003] At present, in the high-voltage soft-start thyristor trigger system, the active drive is to realize the power supply of the thyristor trigger board through the principle of magnetic ring energy harvesting. The triggering of high-...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a high-voltage series thyristor dual-power trigger system to solve the problem of using an 18V power supply after the 30V original voltage is stabilized to a 18V target voltage in the prior art, and the resistance power is relatively large. The trigger power of the silicon controlled rectifier is relatively large, which causes the problem of energy waste

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