Patent ID: 7102312

Claim:
A driving apparatus for driving a single-phase or multiple-phase motor having a rotor provided with a magnet and a stator provided with one or more driving coils, characterized by having: synchronizing reference signal generating means which generates a synchronizing reference signal specified as a basic operation time unit; driving control means which controls an energizing to said driving coils in synchronization with said synchronizing reference signal; terminal voltage detecting means which detects a terminal voltage value on arbitrary one or more phases in said driving coils; terminal voltage holding means which holds the voltage value detected by said terminal voltage detecting means; operation period setting means which sets a period that said driving control means is conditioned to be non-drive on at least one phase of said driving coils and a period that said terminal voltage detecting means is conditioned to be operative during the period in the non-drive condition; and synchronous control means which compares, on the same phase, a difference between the voltage value detected by said terminal voltage detecting means and the voltage value held in said terminal voltage holding means with a reference value, and controls a frequency of said synchronizing reference signal on the basis of a result of the comparison.