II. ARCHITECTURE AND OPERATING PRINCIPLES
Because the induced AC power is low frequency (200
Hz), two small time intervals can be selected when jvinj
is high enough. Within this small time interval, the input
AC power can be treated as a DC one. Thus, a DC-to-DC
boost converter is used to boost the low-voltage input to
the high-voltage output, as illustrated in the top half of Fig.
1. First, the switch M1 is on and the receiving coil shorts
itself. During that period, the magnetic energy is stored in
the coil with the rising current through the coil LR. Second,
when the switch M1 is off, the stored magnetic energy in
the coil will convert into a voltage source that adds to the
input voltage. Thus, the total voltage across the coil is higher
than its original input voltage and charge the load during that
34th Annual International Conference of the IEEE EMBS
San Diego, California USA, 28 August - 1 September, 2012
978-1-4577-1787-1/12/$26.00 ©2012 IEEE 1675