Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1999-04-13
2000-06-06
Masih, Karen
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318727, G05B 1929
Patent
active
060722967
ABSTRACT:
An asynchronous motor for a drive mechanism, in particular a hoist or a running gear includes a motor housing with opposite end faces covered by respective end shields, and an annular short-circuit winding disposed on a motor shaft. An asynchronous motor of this type is compact and inexpensive to manufacture and can be reliably controlled even in the presence of a rear-mounted magnetic brake, by accommodating in the motor housing at least two sensor units which are arranged sequentially in the direction of rotation of the motor at the rear of the motor housing, with each sensor unit including an opto-electronic receiver and a confronting electro-optic transmitter. Secured in the motor housing on the motor shaft between the short-circuit winding and the rear end shield is a circular rotary disk which includes modulation elements for interaction with the sensor units, by modulating the intensity of optical output signals produced by the electro-optic transmitter when the modulation elements pass by the respective sensor unit. The associated receiver transforms the modulated intensity of the optical output signals for formation of at least one electric motor control signal.
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Publication: "Betriebsanleitung Einbau-Impulsgeber EG" (Operating Manual for Built-in Pulse Transmitter EG) by Mannesmann Demag For dertechnik AG p. 2-11.
Publication: Einbau-Impulsgeber EG, Digitale Informationstechnik fur Bremsmotoren by Mannesmann Demag Fordertechnik AG, p. 2-4.
IBM Technical Disclosure Bulletin, vol. 17, No. 2, Jul. 1974, p. 357-358.
Grieb Eckerhardt
Krebs Wolfgang
Muller Anton
Persico Giuliano
Weber Gerhard
Duda Rina I.
Feiereisen Henry M.
Mannesmann AG
Masih Karen
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