Abstract
Research results of induction heating transistor high - frequency series resonant inverters with modular structure on the base of parallel – series connection are presented in the paper. Pulse density modulation is used to regulate the output current of the inverter. It is shown that the use of the out-of-phase inverter modules control allows reducing the amplitude pulsation of the output current amplitude, which is especially important under low quality of the output resonant circuit and a wide range of load parameters. A mathematical model of the series resonant voltage inverter with a modular structure is presented; it allows the calculation of output current under different parameters of pulse density modulation. References 7, tables 2, figures 5.
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