B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
364/23
B66B 1/28 (2006.01) B66B 5/02 (2006.01)
Patent
CA 1205222
ABSTRACT An elevator has a converter which changes an A.C. output from an A.C. power source into a D.C. output, an inverter which changes the D.C. output of the converter into an A.C. output, a current detector which detects an output current of the inverter, and an inverter controller which controls the inverter on the basis of the detected current value of the current detector and a command current value, and a hoist motor driven by the A.C. output of the inverter. The operation of the inverter is stopped when a difference between the detected current value and command current value of the current detector for detecting the output current of the inverter exceeds a preset value. Accordingly, a current detector for detecting current flowing through the inverter is dispensed with, to realize a simple arrangement and a low cost.
456569
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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