Variable reluctance motor with reduced torque ripple
Patent 4647802 Issued on March 3, 1987. Estimated Expiration Date: 
June 13, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 13, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3058019 3375421 3522501 3564312 InventorApplicationNo. 06/752987 filed on 06/13/1985US Classes:310/49R, Step-by-step310/162, Synchronous310/168Inductor-type generators (variable reluctance)ExaminersPrimary: Duggan, Donovan F.Attorney, Agent or FirmInternational ClassesH02K 19/10 (20060101)H02K 19/02 (20060101) H02K 37/02 (20060101) H02K 37/04 (20060101) AbstractA variable reluctance motor having tapered stator teeth and more rotor teeth than stator teeth. The width of the stator and rotor teeth provides a relatively high rotor tooth ratio and a relatively low stator tooth ratio. With this configuration the motor has very low torque ripple. Magnetic saturation is limited to the tips of the stator teeth, so the motor can be operated at current levels above the saturation point, producing a linear torque to current function and high output torque. | |
