Stage dimmer based on chopping-control alternating-current voltage regulation and regulating method thereof

Abstract

The invention discloses a stage dimmer based on chopping-control alternating-current voltage regulation and a regulating method of the stage dimmer. The stage dimmer based on chopping-control alternating-current voltage regulation comprises a data receiving circuit, a single-chip microcomputer, a PWM pulse circuit, an IGBT drive protection circuit, an IGBT chopping-control voltage regulating circuit and a filter circuit. After receiving signals from a stage dimming console, the data receiving circuit transmits the signals to the single-chip microcomputer; the PWM pulse circuit is electrically connected to the output end of the single-chip microcomputer, the output end of the single-chip microcomputer is electrically connected to the input end of the IGBT drive protection circuit, the output end of the IGBT drive protection circuit is electrically connected with the input end of the IGBT chopping-control voltage regulating circuit, the IGBT chopping-control voltage regulating circuit is electrically connected with the input end of the filter circuit, and the output end of the filter circuit is electrically connected with stage lamps. The stage dimmer based on chopping-control alternating-current voltage regulation and the regulating method of the stage dimmer achieve the advantages of restraining harmonic waves and radio interference of the circuits and improving dimming performance of stage light.

Description

technical field [0001] The invention relates to the field of stage lighting control, in particular to a stage dimmer based on chopping control AC voltage regulation and a regulation method thereof. Background technique [0002] At present, the common stage dimming technology mostly uses thyristor as the dimming element. The thyristor dimming principle is as follows: the console sends out a control signal, which is converted into a pulse signal with variable phase angle by the dimmer, and drives the thyristor. , the thyristor is turned off by the zero-crossing of the AC main circuit voltage. Repeat the same action in the next cycle. The phase angle variable pulse position is different, and the area of ​​the AC main circuit voltage waveform is different after being chopped, so that the voltage output to the stage lamp is different, and the purpose of dimming is achieved. The voltage and current in the AC main circuit are sine waves , the voltage and current output to the bul...

AI Technical Summary

Problems solved by technology

Due to the use of this AC dimmer, a large number of harmonics and radio interference will be generated, which will distort the sine wave of the power grid, reduce the power factor, and degrade the power quality.

When the stage lighting is used, it interferes with the normal use of other audio equipment

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