Patent ID: 7323834
Filing Date: 2008-01-29
Classification: F16H,H02K

Abstract:
1. A synchronous motor control system comprising: a poly-phase motor including a stator having a plurality of sets of stator teeth and phase coils and a rotor having a plurality of rotor teeth disposed opposite the stator teeth, each set of the phase coils corresponding to one phase of the poly-phase; a current supply circuit for supplying electric current to the phase coils; and a control unit for controlling the current supply circuit to supply electric current to the phase coils, wherein: said control unit counts the number of times current is supplied to the motor and controls said motor according to a control program comprising: supplying current to only a specific one set of the phase coils to position the rotor at a predetermined position of rotor teeth relative to the phase coils and stator teeth; and thereafter sequentially supplying electric current to the phase coils to rotate the rotor until the number of current supply times becomes a prescribed number.