Digital three phase shift trigger integrated circuit

Abstract

A digital three-phase shifting triggering IC contains three comparator circuits, a debouncing circuit, three phase shifting circuits, three pulse width generating circuits, three output driving circuits and a open-phase protection circuit. Said invention adopts digital control method to control accuracy shift triggering of thyristor and raises phase shifting precision and symmetry degree, circuit stability and reliability, and reduces products complexity and separation degree.

Description

(1) Technical field [0001] The invention relates to a digital three-phase phase-shift trigger integrated circuit which uses a digital circuit-based integrated circuit to perform three-phase phase-shift trigger control of a thyristor. (2) Background technology [0002] The phase-shift trigger system and the thyristor intelligent module can further reduce the volume of power electronic devices, further improve reliability, make it easier to use, install and maintain, greatly facilitate users, and make important contributions to mechatronics. Phase-shift trigger system and thyristor intelligent module can be applied in the fields of speed regulation, power regulation, dimming, temperature control, solid-state switch, motor soft start, automatic control, etc. It has good performance, high reliability, and is simple and convenient to use. If digital technology is used instead of analog technology to expand the output capacity of the module, the maximum current of the single-phas...

AI Technical Summary

Problems solved by technology

With the rise of digital trigger circuits, it is designed by single-chip microcomputers, CPLDs (complex programmable logic) and other devices, and uses programming methods to achieve synchronization and phase shifting. The interference ability is poor, the volume cannot be made very small, and it is difficult to realize the miniaturization and mass production of the product, which limits its wide application

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