Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1990-09-27
1992-12-01
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
361 25, 318783, 318471, H02H 504
Patent
active
051684152
ABSTRACT:
A motor control method for determining the temperature of a motor wherein the operation and nonoperation times of the motor are monitored, an estimated temperature is determined as a function of the monitored times and predetermined temperature rise and temperature fall characteristics of the motor, and the motor is stopped and/or an alaram signal is generated if the estimated temperature exceeds a predetermined temperature.
REFERENCES:
patent: 4547826 (1985-10-01), Premerlani
patent: 4573132 (1986-02-01), Boothman et al.
patent: 4717984 (1988-01-01), Henry et al.
patent: 4721894 (1988-01-01), Graber
patent: 5057962 (1991-10-01), Alley et al.
Pellinen A. D.
Schultz C.
Seikosha Co. Ltd.
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