Digital three phase shift trigger integrated circuit

An integrated circuit and phase shifting technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of large circuit scale, limited wide application, high technical requirements, etc., achieve phase shifting accuracy and symmetry improvement, and reduce complexity Degree and dispersion, the effect of improving stability and reliability

Inactive Publication Date: 2005-05-25
上海芯华微电子有限公司
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  • Abstract
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  • Claims
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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 pha

Method used

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  • Digital three phase shift trigger integrated circuit
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  • Digital three phase shift trigger integrated circuit

Examples

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[0026] The integrated circuit in the present invention includes three channels with the same function. In the working state, each channel inputs a step-down AC sine wave AC, and the sine signal forms a rectangular wave through a comparator. A sharp pulse trigger signal is formed at the leading edge of the rectangular wave, and the output is set to a high level. The integrated circuit control signal is a digital control quantity formed by internal A / D conversion using an external DC level to provide an initial value for the down counter. When the counter is reduced to zero, another sharp pulse trigger signal is formed to achieve the purpose of controlling the phase. The output of the integrated circuit is two pulse groups OUT+ and OUT-. There are two types of pulse groups, one is a single-width pulse group, that is, a pulse group with a width of 87°, and the other is a double-narrow pulse group, that is, two pulse groups. A pulse group with a width of 27° and a phase difference of ...

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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...

Claims

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Application Information

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IPC IPC(8): H02M1/08H02M1/084
Inventor 韩志刚朱以南李宏星林争辉
Owner 上海芯华微电子有限公司
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