Soft starter device triggering circuit power supply source

Abstract

The invention relates to a power supply source of a trigger circuit in a 6/10KV soft start device. The power supply source comprises a high-frequency adjustable constant-current supply, a single-turn electric current loop, a coupling mutual inductor and a voltage stabilizing circuit, wherein the high-frequency adjustable constant-current supply sequentially passes through the coupling mutual inductor of each trigger unit to form the high-frequency single-turn electric curent loop; the electrical energy is coupled to each trigger unit, and a stable trigger power supply is obtained through a voltage stabilization circuit. The insulating energy supply problem of the trigger circuit of a thyristor convertor valve series element in a middle and high pressure soft start device and a deflector is solved, the stable power supply and high dielectric strength of the trigger circuit are ensured, the volume is small, the fabrication technology is simple, and the integrated connection is easy to be realized. The invention can be applied to the control of the middle and high pressure soft start and the insulating energy supply of the trigger circuit of the thyristor series element in a high-frequency convertor valve, and the invention is universal and worth popularizing.

Description

technical field [0001] The invention relates to a power supply, especially a power supply for a trigger circuit of a soft start device, and specifically proposes a power supply for a trigger circuit of a 6 / 10KV soft start device, which is mainly used in the soft start control of medium and high voltage motors and in high voltage converter valve devices The isolated power supply of the thyristor series element trigger circuit has certain versatility. Background technique [0002] At present, the power supply of thyristor variable valve trigger circuit of 6 / 10KV soft starter at home and abroad adopts the transformer isolation power supply scheme. circuit, through rectification, filtering, voltage stabilization and other links to form the trigger unit power supply. This method has the following disadvantages: [0003] 1) The transformer is bulky. Since the trigger power supply needs enough energy to meet the requirements of strong triggering of the thyristor converter valve,...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a power supply for the trigger circuit of a soft starter, specifically a power supply for the trigger circuit of a 6/10KV soft starter, which can overcome the deficiencies of the prior art and solve the problems of medium and high voltage soft starters and inverters. The problem of isolated power supply for the trigger circuit of the th

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