Circuit for operating an electric motor

Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems

Reexamination Certificate

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Details

C318S778000, C318S705000

Reexamination Certificate

active

07015671

ABSTRACT:
A circuit configuration for operating an electric motor is described, the circuit configuration containing a timer. As a function of a first differential signal between a setpoint signal and an actual value signal, a regulator supplies a first switch signal for feeding current to the electric motor. Simultaneously, the timer is started which limits the current feed signal to a specified maximum time. A detection system detects a change in the setpoint signal and thereupon outputs a second switch signal that also starts the timer and is able to trigger the current feed to the electric motor. The circuit configuration both protects the electric motor from a thermal overload and also makes it possible to feed current to the electric motor if a setpoint changes. The circuit configuration is suitable to be used in a variable speed drive.

REFERENCES:
patent: 4250435 (1981-02-01), Alley et al.
patent: 4490620 (1984-12-01), Hansen
patent: 4604563 (1986-08-01), Min
patent: 4673859 (1987-06-01), Shero et al.
patent: 4914371 (1990-04-01), Shibata et al.
patent: 5397972 (1995-03-01), Maiocchi
patent: 5428284 (1995-06-01), Kaneda et al.
patent: 5600559 (1997-02-01), Nishimoto et al.
patent: 5694011 (1997-12-01), Corey et al.
patent: 5834911 (1998-11-01), Kimura
patent: 5910890 (1999-06-01), Hansen et al.
patent: 6064196 (2000-05-01), Oberlin et al.
patent: 6118244 (2000-09-01), Steinbusch
patent: 6803735 (2004-10-01), Liu et al.
patent: 197 44 729 (1999-04-01), None
patent: 199 08 007 (2000-04-01), None
patent: 100 07 690 (2001-08-01), None
patent: 60141184 (1985-07-01), None
patent: WO 21189 (2000-04-01), None

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