Fully controlled three-phase bridge rectifiers are known as the most common AC to DC converters. Fully controlled bridge converters are widely used in controlling the output voltage of power exchangers by electrochemical processes and can be formed simply by placing six thyristors instead of six rectifier diodes. Thyristors are three-ended semiconductor components that conduct current when a suitable trigger pulse is applied to their gate and their anode-cathode voltage is positive. Therefore, by delaying the trigger pulse time (fire angle), we can delay. As a result, by controlling a three-phase rectifier that uses a thyristor instead of a diode, we can control the amount of DC output voltage by controlling the firing angle of the pair of thyristors, thus rectifying the output voltage as a function of the firing angle α.