Title: Speed-regulated positioning drive

Abstract: The drive shaft of a motor can be coupled to an output shaft by an electromagnetically activated friction clutch. The output shaft can be braked by an electromagnetically activated friction brake. The motor drive shaft rotates at constant speed. The rotary speed of the output shaft is regulated by negative-feedback action to maintain a selected value, by activating the clutch and brake alternately as necessary. The activating signals for the clutch and brake are pulse-width-modulated activating signals. The output shaft can be stopped in at least one predetermined angular position when commanded to do so. The movable parts of the brake and clutch are of minimal mass, and the speed-regulating system includes a speed feedback transducer system of very high resolution.

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Inventors: Angersbach, Wolfgang (Darmstadt, DE, US)
Meier, Karl-Heinz (Zeilhard, DE, US)

Application Number: 861636
Filing Date: 1977-12-19
Publication_date: 1980-10-14
Assignee: Quick-Rotan Becker & Notz KG (Darmstadt, DE)
Primary Class(es): 318/614 318/603, 318/611
Other Classes:
US Patent Ref:

3240301	Mar, 1966	Smith	192/107.
3599764	Aug, 1971	Daab et al.	192/12.
3622852	Nov, 1971	Myers	318/341.
3637053	Jan, 1972	Boyles	192/70.
3721882	Mar, 1973	Helms	318/603.
3952236	Mar, 1976	Hoover	318/341.
4006809	Feb, 1977	Seino et al.	192/113.
4011490	Mar, 1977	Daab et al.	318/467.
4013933	Mar, 1977	Dohi et al.	318/467.

Other Refs: 2416238

Nov, 1974	DE

Primary Examiner: Truhe, J. V.
Assistant Examiner: Indyk, Eugene S.
Attorney: Striker; Michael J.