Apparatus for regulating an elevator motor

Details Apparatus for regulating an elevator motor Apparatus for regulating an elevator motor

B - Operations, Transporting

66

B

B66B 1/30 (2006.01) H02P 27/04 (2006.01) H02P 5/06 (1995.01)

Patent

CA 2149009

The invention relates to an apparatus for regulating the speed of an a.c. elevator motor by means of a frequency converter consisting of a rectifier bridge and an inverter bridge. The frequency of the frequency converter is adjusted until it corresponds to a frequency reference corresponding to the speed reference of the motor. The speed of the motor is measured to form a speed feedback signal. According to the invention, the apparatus comprises means for correcting the speed reference on the basis of a change occurring in a voltage of an intermediate circuit between the rectifier bridge and the inverter bridge.

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