The phase (line) terminal is connected to thyristor T1 anode and the natural is connected directly to the load. The input voltage of the circuit is 220V/230V 50Hz alternating current (AC) from home outlet. The following image shows project hardware circuit diagram.Īll the grounded terminals are connected together. The thyristor goes to the nonconducting condition (OFF state) when the load voltage and, consequently, the current try to reach a negative value.Ģ20V Half wave controlled rectifier with Arduino circuit: The load is resistive and therefore current id has the same waveform as the load voltage. ![]() In the figure below the angle ‘alpha’ is measured from the zero crossing point of the supply voltage Vs. ![]() Delaying the firing pulse by an angle ‘alpha’ does the control of the load voltage. The thyristor will conduct (ON state) when the voltage Vt is positive (Vt > 0) and a firing current pulse Ig is applied to the gate terminal. In single-phase half-wave rectifier, only one thyristor is used to control the load voltage. ![]() The gate terminal is used to control the SCR, the anode (A) and cathode (K) are connected in series with the load. ![]() The SCR (thyristor) is a three-terminal device (Anode, Cathode and Gate) with four layers of alternating p- and n-type material. No warranty is provided with this project, do it at your own risk! This post shows how to build a half wave controlled rectifier using Arduino uno board and one thyristor (SCR).
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