Design and control aspects related to dual frequency inverters are presented in this paper. Zero voltage switching aspects related to this configuration are explained. . Multi-frequency sinusoidal pulse width modulation (MF-SPWM) technology can output multiple sine wave frequencies at the same time with only one inverter, which effectively reduces the system size and improves compatibility. However, MF-SPWM and dead-time make the MF-inverter highly nonlinearized. . This paper presents new resonant inverter topologies for dual-frequency induction heating (IH). These 2T1C and 3T topologies combine the advantageous features of two- and one-inverter solutions. An analytical description of the load impedance of a dual-frequency series-parallel circuit has been. . Abstract—Dual frequency inverters are used for induction gear hardening. Two inverter topology for dual frequency operation is considered. Dual-frequency modulation, where one is the resonant frequency and the other is the non-resonant frequency, is used in the. . Authors to whom correspondence should be addressed. Induction heating (IH) applications, assisted with converter topology and their control, have become very attractive in recent years.
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