Procedure for controlling the motor of a crane

Details Procedure for controlling the motor of a crane Procedure for controlling the motor of a crane

H - Electricity

02

P

H02P 1/04 (2006.01) B66C 13/22 (2006.01) H02P 5/00 (2006.01)

Patent

CA 2057735

The present invention relates to a procedure for selecting the mode of controlling the motor of a crane, or an equivalent lifting apparatus, when at least two alternative modes of controlling the motor are available, and at least one of the modes involves control by means of a switch having at least two positions connectable in a predetermined order, so as to produce corresponding control signals at a control input port. Each control mode uses at least one control signal common to all modes. According to the invention, the control signals applied to a control input port are monitored, the prevailing control situation is determined on the basis of the monitored signals and the mode of control is selected on the basis of which of the signals are active and the prevailing control situation.

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