Control apparatus for a step drive

Details Control apparatus for a step drive Control apparatus for a step drive

H - Electricity

02

P

341/66

H02P 15/02 (2006.01) H02H 7/093 (2006.01) H02P 8/00 (2006.01)

Patent

CA 1214846

Abstract In a control apparatus for a step drive having a change-over clutch (3), provision is made for a disc connected to the operating element and for a sensor. The disc has two zones of different condition. The first zones comprise at least one section of larger width and further sections of smaller width. An evaluating circuit (14) comprises two time comparator circuits (22, 23) of which the first responds when the respective scanning time of a first zone exceeds a first limiting value and the second responds when the respective scanning time of a second zone or of a first zone and an adjacent second zone exceeds a second limiting value. The first limiting value is larger than the scanning time of the sections of smaller width and smaller than the scanning time of the sections of larger width of the first zones at nominal rotary speed of the operating element. The second limiting value is larger than the scanning time of the sections of larger width of the second zones or the sum of the scanning times of a first zone and an adjacent second zone at nominal rotary speed of the operating element. Fig. 4

421183

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