Method for operating a radio-frequency inverter which is provided with semiconductor switches, especially for inductive or capacitive heating systems, and an arrangement for this purpose

摘要

The invention relates to a method for operating a radio-frequency inverter which is provided with semiconductor switches and supplies an inductive or capacitive load, especially a heating system, which is supplemented to form an LC resonant circuit (3, 4). In this case, the amplitude of the oscillating load current (i) is regulated by cyclic excitation of the resonant circuit (3, 4) and in order to minimise the switching losses and the protective circuitry of the semiconductor switches (21, 22) whose switching times are placed in the zero crossovers of the load current (i). The invention furthermore relates to an arrangement for application of the method. <IMAGE>