Polyphase motor driving apparatus, polyphase motor driving apparatus driving method and polyphase motor system

摘要

A polyphase motor driving apparatus having a receiving function for receiving a pulse signal from a position detector, which is connected to the rotary shaft of a rotor (having a plurality of poles) of a polyphase motor provided with a stator having a plurality of poles and which generates the pulse signal every time the rotor rotates by 360/n, where n is a positive integer; and a supply function for judging the present position of the rotor every time one pulse of the pulse signal is received and for supplying a polyphase current to the polyphase motor at a timing based on the judgment, thereby switching the excitation phase of the polyphase motor and rotating the rotor.