Patent ID: 6137204
Filing Date: 2000-10-24
Classification: H02K

Abstract:
A VR-type resolver comprising:an annular-shaped stator fixedly supported, said stator including a plurality of magnetic poles formed at regular intervals on a circumference thereof, each of said magnetic poles having a plurality of pole teeth in their respective leading end portions, said magnetic poles having N phases of coils respectively wound phase by phase in series therearound; andan annular-shaped rotor disposed concentrically with said stator and rotatable with respect to said stator, said rotor including teeth respectively formed in a circumferential direction thereof so that they are opposed to said pole teeth of said stator,wherein the number of said magnetic poles of said stator with respect to the number of said teeth of said rotor is set (i) so as to be a multiple of said phase number N and an even number, and (ii) satisfy one of the following expressions (1) and (2):stator pole number=rotor teeth number/(M+1/N) (1)stator pole number=rotor teeth number/{M+(N-1)/N} (2),where M is an integral number of one of 1, 2 and 3.