Title:
DRIVE UNIT FOR AN ELECTRIC DOOR
Document Type and Number:
WIPO Patent Application WO1997019245
Kind Code:
A3
Abstract:
A drive unit for an electric door, in particular a lift (elevator) door, comprises a mains transformer, an electronic programmable control device and an electric motor with an incremental sensor and a counter. To improve a drive of this type in a way which reduces manufacturing and operating costs without detriment to its functional qualities, the control device (1) takes the form of a current transformer such that in the power ranges usual for electric door drives, electric motors (2, 3, 4) of any dimensions can be supplied with energy in accordance with their demand from mains transformers (5, 6, 7) of any dimensions even in case of diverging nominal voltages.
Inventors:
LUDWIG HEINZ
NOLTE UWE
SONNTAG GUIDO
ROWEDDA VOLKER
NOLTE UWE
SONNTAG GUIDO
ROWEDDA VOLKER
Application Number:
PCT/DE1996/002264
Publication Date:
July 03, 1997
Filing Date:
November 25, 1996
Export Citation:
Assignee:
SIEMENS AG (DE)
International Classes:
B66B13/14; G05B19/23; H02M1/10; H02P7/00; H02P7/02; (IPC1-7): E05F/
Foreign References:
| EP0384788A1 | 1990-08-29 | |||
| US4376471A | 1983-03-15 | |||
| EP0170641A2 | 1986-02-05 | |||
| US5175400A | 1992-12-29 | |||
| EP0375786A1 | 1990-07-04 | |||
| US3902573A | 1975-09-02 | |||
| US4545464A | 1985-10-08 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 014, no. 039 (M - 924) 24 January 1990 (1990-01-24)
PATENT ABSTRACTS OF JAPAN vol. 016, no. 250 (M - 1262) 8 June 1992 (1992-06-08)
PATENT ABSTRACTS OF JAPAN vol. 016, no. 306 (M - 1276) 6 July 1992 (1992-07-06)
PATENT ABSTRACTS OF JAPAN vol. 016, no. 250 (M - 1262) 8 June 1992 (1992-06-08)
PATENT ABSTRACTS OF JAPAN vol. 016, no. 306 (M - 1276) 6 July 1992 (1992-07-06)
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