Transformer Testing
Calculation of the Effect of Rectifier Transformer Impedance on Rectification Circuit Characteristics
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Calculation of the Effect of Rectifier Transformer Impedance on Rectification Circuit Characteristics

1. Calculation of Commutation Overlap Angle

As for SCR rectification circuit of m-impulse, if there is only m/3 SCR break-over at any moment, the phase difference between two phase power supply is always m/3x2π/m=2/3 . Three-phase half-wave rectification circuit is the base unit of all three-phase rectification circuit. In the Fig.1, the letter “L” represents the leakage inductance of each phase that is converted to secondary side of power transformer. Assume that the load current is smooth direct curren Id:  

Circuit