The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2013
Filed:
Sep. 10, 2010
Shih-chin Yang, Madison, WI (US);
Takhiro Suzuki, Ibaraki, JP;
Robert Donald Lorenz, Madison, WI (US);
Thomas Merlin Jahns, Madison, WI (US);
Shih-Chin Yang, Madison, WI (US);
Takhiro Suzuki, Ibaraki, JP;
Robert Donald Lorenz, Madison, WI (US);
Thomas Merlin Jahns, Madison, WI (US);
Wisconsin Alumni Research Foundation, Madison, WI (US);
Abstract
A permanent magnet motor for position sensorless drive operation provides a stator design that exhibits a saliency (machine asymmetric) functionally dependent on rotor position as caused by periodic magnetic saturation of stator structure. This saturation property is caused by rotor zigzag leakage flux from surface permanent magnets. The stator structure may be designed to further saturate from zigzag leakage flux to provide greatest spatial saliency in the quadrature phase for motor position sensorless position estimation. The position, velocity, and shaft torque can be extracted by measuring the phase current from the stator coil of permanent magnet motor.