A circuit model (50) for use in analyzing a VCM circuit has a first
resistor (62), a first inductor (64), a second inductor (58), and a
voltage source (60), in series modeling, respectively, a VCM inductor, a
winding leakage inductance of the VCM inductor, a VCM inductor resistance,
and a BEMF voltage generated across the VCM inductor when the input nodes
are open circuited. An input capacitor (56) interconnects the input
terminals (52,54) to model an equivalent capacitance of the VCM inductor.
Third and fourth inductors (32,34) and a second resistor (36) are
connected in a first series loop (28) inductively coupled to the second
inductor (58) to model, respectively, an inductance of the top VCM magnet
plate, the leakage inductance of the top VCM magnet plate, and a
resistance of the top VCM magnet plate. Fifth and sixth inductors (78,80)
and a third resistor (72) are connected in a second series loop
inductively coupled to the second inductor (58) to model, respectively an
inductance of the bottom VCM magnet plate, the leakage inductance of the
bottom VCM magnet plate, and the resistance of said top VCM magnet plate.
