The control circuit diagram of optical coupler electrical heating

Published:2011/5/9 21:25:00 Author:Ecco | Keyword: control circuit, optical coupler , electrical heating | From:SeekIC

The pulse output from pulse oscillator reachesthe positive electrode of the light-emitted diode in the solid by LED. The luminous intensity of LEDis changed with pulse duty factor. Then the breakover degree of photo-thyristor is changed to realize the purpose of constant temperature control. The pulse oscillator is composed of trigger circuit and constant temperature control circuit of solid relay. The pulse oscillator in the circuitry is a type of oscillator with steady frequency and adjustable pulse duty factor. To regulate the charging and discharging time of convertibility capacitance C1 by changing RP, then the pulse duty factor is changed. While needing to raise heat temperature, the RP can be turned right in the chart to relay the charging time of C1; Or the RP can be turned left may decrease the discharging time of C1. The period of surge in the circuitry is 1255, and account for the range of O. 4%~99. 6% in adjustable pulse duty factor.



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