METHOD AND DEVICE FOR PHASE CONTROL OVER VARIABLE VOLTAGE Russian patent published in 2015 - IPC G05F1/00 

FIELD: electrical engineering.

SUBSTANCE: this method comprises alternating connection of reactive load to supply circuit with the help of single half-wave control switches of serial circuit and its short-circuiting by single half-wave zero switches of parallel circuit. Then, the load is short-circuited at the start of existing voltage half-wave. Then, at preset control angle, control switch of previous half-period is switched on to provide for electromagnetic circuit power recuperation to the circuit. Proposed device control and zero switches are connected in pairs to bridge circuit, one diagonal of the latter being connected with supply circuit and another diagonal being connected with load via current transducer. Note here that control switches are shunted by inverter diodes.

EFFECT: expanded control range at inductive load irrespective of its parameters, reliable AC voltage controller.

2 cl, 2 dwg