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Patent Searching and Data


Title:
PERMANENT MAGNET MOTOR WITH STATOR-BASED SALIENCY FOR POSITION SENSORLESS DRIVE
Document Type and Number:
WIPO Patent Application WO/2012/033688
Kind Code:
A3
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.

Inventors:
YANG SHIH-CHIN (US)
SUZUKI TAKHIRO (JP)
LORENZ RONALD DONALD (US)
JAHNS THOMAS MERLIN (US)
Application Number:
PCT/US2011/049980
Publication Date:
June 20, 2013
Filing Date:
August 31, 2011
Export Citation:
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Assignee:
WISCONSIN ALUMNI RES FOUND (US)
YANG SHIH-CHIN (US)
SUZUKI TAKHIRO (JP)
LORENZ RONALD DONALD (US)
JAHNS THOMAS MERLIN (US)
International Classes:
H02P6/18; H02K29/06
Domestic Patent References:
WO2004023639A12004-03-18
WO2009024835A12009-02-26
Foreign References:
EP2061147A22009-05-20
Other References:
JI-HOON JANG ET AL: "Sensorless drive of surface-mounted permanent-magnet motor by high-frequency signal injection based on magnetic saliency", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 39, no. 4, 1 July 2003 (2003-07-01), pages 1031 - 1039, XP011098895, ISSN: 0093-9994, DOI: 10.1109/TIA.2003.813734
Attorney, Agent or Firm:
BAXTER, Keith, M. (SC840 N. Plankinton Avenu, Milwaukee Wisconsin, US)
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