Thyristor bridge oscillator regulator for induction heating - is controlled via bistable oscillator and integrated counter-decoder

摘要

The regulator for a bridge oscillator uses one or two pairs of thyristors operating alternately the load acting as part of the oscillator in a full or half-wave bridge. Regulation is based on variation of the duration of the conductance cycles in steps corresponding to whole multiples of predetermined fractions of a reference period and automatic synchronisation of the reference cycle passage through zero. A detector circuit monitors normal or abnormal functioning of the oscillator. The reference generator uses a clock source, thyristor control being via a bistable oscillator and an integrated counter/decorder.