Silicon controlled chopping power regulation driving device

Abstract

The invention relates to a silicon controlled chopping power regulation driving device, wherein the power frequency signals of a power supply pass through the eighth resistor of an alternating current power supply zero-crossing detection circuit to be input, the signals pass through a first triode and a second triode to generate a positive semicircle standard sawtooth wave and a negative semicircle standard sawtooth wave of which inclined planes are towards the left; the positive semicircle standard sawtooth wave and the negative semicircle standard sawtooth wave pass through the first comparator and second comparator of a voltage-time converter to be converted to a positive semicircle standard sawtooth rectangular wave and a negative semicircle standard sawtooth rectangular wave; the positive and negative semicircle standard sawtooth rectangular waves pass through a differential circuit so that the waveforms of the positive and negative semicircle standard sawtooth rectangular waves are combined; and the third voltage comparator of a waveform shaping circuit is used to perform waveform shaping again, and the shaped waveform drives a silicon controlled rectifier to output choppingsignals. The driving device of the invention realizes the characteristics of low cost, high output efficiency, wide power regulating range, high regulating fineness, easy modularizaion process and the like. The driving device is particularly suitable for the application fields which require power regulating, have simple functions and are sensitive to the cost, such as motor speed regulating and desk lamp brightness regulating.

Description

Technical field:

[0001] The invention relates to the technical field of thyristor control, in particular to a thyristor power-adjusting driving device, and is particularly suitable for the thyristor power-adjusting driving device used for motor speed regulation and table lamp brightness adjustment. Background technique:

[0002] At present, the application of thyristor phase modulation to adjust power is very common. The characteristic of adjusting power with this method is that it can obtain relatively high energy output efficiency. At present, this method of power adjustment can be divided into two types, one is hardware shifting Phase modulation technology, the other is to rely on single-chip software control to achieve chopping power adjustment. However, the phase shifting range of the current hardware phase-shifting and power-modulating circuit can only be less than 90 degrees, that is, the power adjustment range can only be within the range between 50% and 100% of the ...

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