Description: The paper discusses the simulation, performance
and optimum design of single-phase-to-
2-phase cycloconvertors driving an induction
motor. Bridge and centre-tapped circuits using
triacs with double-integral control are considered.
Results are presented for 2-pole induction-motor
drives which may operate at speeds 0 to
1500 rev/min. The simulation is shown to model
the performance of the drives successfully, and is
used to predict an optimum design. An improvement
to the control algorithm at bank crossover is
presented. The bridge circuit is more efficient than
the centre-tapped circuit, but uses more triacs.
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