Patent ID: 6172474
Filing Date: 2001-01-09
Classification: H02P

Abstract:
A motor comprising:a rotatable member;plural-phase windings;a voltage supplying means including an FET switching transistor for performing high-frequency switching of a power supplying path of a DC power source to provide a converted DC voltage;Q (Q is an integer of 2 or more) first power amplifying means each one including a first FET power transistor for forming a current path from a negative output terminal of said voltage supplying means to one of said plural-phase windings;Q second power amplifying means each one including a second FET power transistor for forming a current path from a positive output terminal of said voltage supplying means to one of said plural-phase windings;altering signal forming means for producing plural-phase altering signals;first distribution control means for controlling said Q first power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said first FET power transistors to conduct;second distribution control means for controlling said Q second power amplifying means in response to at least one of the altering signals of said altering signal forming means to cause at least one of Q of said second FET power transistors to conduct; andconversion control means for changing said converted DC voltage across said positive output terminal and said negative output terminal of said voltage supplying means synchronously with respect to the rotation of said rotatable member.