All-digital silicon controlled rectifier controller chip for three-phase alternating-current voltage regulation and rectification

Abstract

The invention discloses an all-digital silicon controlled rectifier controller chip for three-phase alternating-current voltage regulation and rectification. The chip is an integrated circuit controller special for a silicon controlled rectifier and has the functions of trigger pulse forming and modulation, phase sequence self-adaptation, automatic fault protection, and real-time power grid frequency measurement. A chip circuit is composed of a frequency dividing circuit, a reset circuit, an IIC_SLAVE control circuit and a silicon controlled rectifier trigger circuit, a universal IIC digital interface is adopted, and automatic control of power electronics can be achieved conveniently. A user can configure and control the chip accurately through the universal digital interface of the chip. Due to the fact that digital control can not be easily affected by factors such as environment temperature, supply voltage and time change, system stability, overall reliability, universality and flexibility are improved greatly, and a dedicated chip high in accuracy and controllability is provided for a strong current control system.

Description

technical field [0001] The invention relates to a thyristor control circuit, in particular to an all-digital thyristor controller chip for three-phase AC voltage regulation and rectification. Background technique [0002] In the existing technology, power electronics technology is an important branch of electrotechnical technology, and the thyristor (thyristor) controller is one of the core technologies. It has gone through several development stages so far: [0003] (1) The stage of analog circuits (discrete devices) in the 1960s and 1970s; [0004] (2) The stage of analog integrated circuits in the 1980s: this stage realized the integration of discrete devices, but it was still essentially analog signal control. For example, the domestic KJ series thyristor dedicated analog integrated circuit controller, the German Siemens TCA series thyristor dedicated analog integrated circuit controller, etc., the technologies used are all through the comprehensive comparison of the ph...

AI Technical Summary

Problems solved by technology

Although this type of digital controller makes up for the shortcomings of the above-mentioned thyristor control chip, it still has problems such as high cost, repeated development, and low control accuracy.

Therefore, in the prior art, there is a lack of an all-digital thyristor controller chip for three-phase AC voltage regulation and rectification to solve the defects of the prior art

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