From Fig. 2 one can also see the mounting position of the
receiver in HPWC. In this experiment, the receiver was
placed on the outside surface of the top housing, which is
also above the magnet during the whole experimental
process. Through measurement, the distance between
receiver and magnet was 3mm. As Fig. 1 and 2 show, the
face with claw-type pole B of the receiver is close to magnet.
In this experimental prototype, two kinds of coils (Coil A
and Coil B), were employed to test the performances of
HPWC. These coils were wound by copper wire with a
diameter of 0.12mm which was painted with insulation
paint. The dimensions of these coils are listed in Table II.
When measuring the performance of HPWC with loads, the
resistance value of loads applied in the experiment was
determined by the resistance of coil in the receiver.
Therefore, resistances of 62 and 75 were employed to
test the performance of HPWC when copper Coil A and B
were available respectively. The mounting position of the
copper coil is illustrated as Fig. 1. Moreover, the two
claw-type poles and rivet are made of electrical pure iron. As
Fig. 2 shows, the supporting system of HPWC mainly
contains a bearing, top and bottom housings, which are
employed to fix and support the other parts of HPWC. All of
the parts in the supporting system are made of organic glass.
Fig. 3 is the photograph of the experimental prototype. The
dimension of the equipment is 90mm×50mm×28mm. In detail,
the testing chart of open-circuit HPWC and HPWC with a load
are shown as Fig. 3(a) and (b), respectively. All the voltage data
in this experiment were collected by oscilloscope