METHOD OF INDEPENDENT AGREED inverter with quasi-resonant switching

摘要

FIELD: electricity.;SUBSTANCE: in a method of inverter control in process of switching of inverter valves, a voltage level is set on the valves, instantaneous voltage values are measured on the valves, as well as an instantaneous AC value in a load, moments of instantaneous AC value transition through zero are identified, sync pulses are generated with duration δ, corresponding to the interval [π/180, π/90], in the moments of instantaneous AC value transition in a load through zero, another control pulses are generated and sent, and another valves are connected not earlier than on the moments of the instantaneous AC value transition in a load through zero, control pulses are removed from valves, and valves are switched off with anticipation by an angle γ in the interval [π/45, π/6] in respect to moments of instantaneous AC value transition in a load through zero. At the same time instantaneous voltage values are compared on valves, which are subject to another connection, in the range δ of sync pulses action with the specified voltage level on the valves, and supply of another control pulses is prohibited, if instantaneous voltage values on another valves exceed the specified voltage level on the valves in the range δ of sync pulses action.;EFFECT: higher reliability of operation.;3 dwg