The current regulator on the trinistor. Scheme, description

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The current regulator on the trinistor. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Regulators of current, voltage, power

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The circuit is similar to many well-known circuits of trinistor current controllers, however, it also has its own peculiarity: the current of the control electrode of the trinistor VD5 is adjusted by shunting the RE circuit.

SCR current regulator

When moving the slider of the potentiometer R4 upwards in the circuit, the transistor VT1 opens, and the trinistor opens for a smaller part of the period, reducing the voltage at the load.

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