A method for determining a speed of an electric motor of an elevator comprising a plurality of phases for supplying electric current to the electric motor. The method comprises forming an effective short-circuit between at least two of the plurality of phases of the electric motor, determining a short-circuit current, the short-circuit current being the current flowing in the effective short-circuit, and determining the speed of the electric motor based on at least one characteristic of the short-circuit current.
METHOD FOR DETERMINING SPEED OF AN ELECTRIC MOTOR, AN ELEVATOR CONTROL UNIT UTILIZING THE METHOD THEREOF AND A COMPUTER PROGRAM PRODUCT
2017-09-14
Patent
Electronic Resource
English
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