Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/193632
Kind Code:
A1
Abstract:
This motor control device (2) comprises: a relay group (70) that has c contact relays (63, 64) for controlling application of AC voltage between a single common line (6) and individual tap extraction lines (7, 8), the number of c contact relays corresponding to the number of tap extraction lines (7, 8); a current detection circuit group (21) for which AC voltage is applied via the c contact relays (63, 64) when a motor (1) is stopped, and that has first current detection circuits (21a, 21b) for detecting current flowing by application of AC voltage, the number of first current detection circuits (21a, 21b) corresponding to the number of tap extraction lines (7, 8); and a second current detection circuit (22) that is connected between the single common line (6) and either of the tap extraction lines (7, 8), the second current detection circuit (22) detecting leakage current that can flow between the motor (1) and ground. The motor control device (2) determines whether or not to stop operation of the motor (1) based on the detection results of the first current detection circuits (21a, 21b) and the detection results of the second current detection circuit (22).
Inventors:
SHIMOJO SATORU (JP)
SAITO FUMIO (JP)
ASHINO MASASHI (JP)
SAITO FUMIO (JP)
ASHINO MASASHI (JP)
Application Number:
PCT/JP2018/014130
Publication Date:
October 10, 2019
Filing Date:
April 02, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P25/16
Foreign References:
| JP3557884B2 | 2004-08-25 | |||
| JPH05256484A | 1993-10-05 | |||
| US20100171449A1 | 2010-07-08 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
Download PDF:
Previous Patent: ENCODER, MOTOR AND METHOD OF ASSEMBLING ENCODER
Next Patent: CONTENT MANAGEMENT SYSTEM, CONTENT MANAGEMENT METHOD, AND MEDIUM SET
Next Patent: CONTENT MANAGEMENT SYSTEM, CONTENT MANAGEMENT METHOD, AND MEDIUM SET