Thyristor operates only in switching mode thyristor can used for control high dc currents and loads thyristor behaves like electronic latch while using as a switch, because when triggered once it remain in conduction state until getting reset manually in this project, we are going to show you how to control a load or dc motor using a. Schematic diagram of dc motor speed control by thyristor. Diode d 1 in fig 19-11 is included in the circuit to protect the scr gate from the negative voltage that would otherwise be applied to it during the negative half-cycle of the ac supply the load for an scr control circuit diagram could be a permanent magnet motor, so that the circuit controls the motor speed.
schematic diagram of dc motor speed control by thyristor
This circuit will allow you to control the speed of an ac motor, for example an electric drill the way that this circuit works is as follows the bridge rectifier produces dc voltage from the 120vac line a portion on this current passes through the 10k ohm pot.
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