Permanent magnet temperature estimation

Details Permanent magnet temperature estimation Permanent magnet temperature estimation

2011-07-12

2011-07-12

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Electric vehicle

C701S031000

Reexamination Certificate

active

07979171

ABSTRACT:
A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is controlled based on direct-axis (d-axis) and quadrature-axis (q-axis) current commands. The method includes estimating permanent magnet flux linkage based on q-axis voltage and electrical angular speed, and estimating permanent magnet temperature based on permanent magnet flux linkage and the temperature coefficient of the permanent magnet. The vehicle is controlled based on the estimated permanent magnet temperature.

REFERENCES:
patent: 6064172 (2000-05-01), Kuznetsov
patent: 7193383 (2007-03-01), Sarlioglu et al.
patent: 7586286 (2009-09-01), Cheng et al.

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