Mathematical modelling of inductor current in class-D amplifier for wireless power transfer
Class-D power amplifier (PA) driving the primary coil of a wireless power transfer (WPT)
system is analyzed. Switching-frequency modulation is used to adjust the PA transmission
power to compensate for coupling and loading variations. The respective inductor currents
of the primary coil working at resonant, harmonic and sub-harmonic frequencies are
analytically derived and verified by extensive SPICE simulations.
system is analyzed. Switching-frequency modulation is used to adjust the PA transmission
power to compensate for coupling and loading variations. The respective inductor currents
of the primary coil working at resonant, harmonic and sub-harmonic frequencies are
analytically derived and verified by extensive SPICE simulations.
Class-D power amplifier (PA) driving the primary coil of a wireless power transfer (WPT) system is analyzed. Switching-frequency modulation is used to adjust the PA transmission power to compensate for coupling and loading variations. The respective inductor currents of the primary coil working at resonant, harmonic and sub-harmonic frequencies are analytically derived and verified by extensive SPICE simulations.
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