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|1. (WO2018123027) REMOTE RECOVERY SYSTEM FOR ELEVATOR FAILURE|
|Applicants:||MITSUBISHI ELECTRIC BUILDING TECHNO-SERVICE CO.,LTD.
MITSUBISHI ELECTRIC CORPORATION
|Title:||REMOTE RECOVERY SYSTEM FOR ELEVATOR FAILURE|
An elevator control device (200) transmits, on the basis of a rotor phase (θ) and a current value (Iu, Iv, Iw), a failure signal to a remote recovery device (300) when an abnormality is detected in a drive system device. When the failure signal of the drive system device is received, the remote recovery device (300) executes an emergency operation in the elevator control device (200) for raising and lowering a car (22) using intermittent braking of a brake (401) when the supply of running-power electric power to a rotary electric machine (400) is stopped. The remote recovery device (300) further determines, on the basis of the rotor phase (θ) and the current value (Iu, Iv, Iw) during emergency operation, whether a magnetic pole correction operation can be executed on the rotary electric machine (400). It can thereby be determined in advance whether execution of magnetic pole correction is appropriate when an abnormality of the drive system device is detected.