Title:
ELECTRIC MOTOR DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/078837
Kind Code:
A1
Abstract:
This driving device is provided with an inverter (30) that operates an electric motor capable of performing switching between star connection and delta connection, wherein when a current, detected by a winding current detection element (61u) that detects a current flowing through a winding, becomes excessive, the inverter (30) is stopped. Further, after removing a circulating current component at the time of delta connection from a winding current detected by the winding current detection element (61u), an inverter output current is calculated and the inverter is controlled using the calculated inverter output current. Since overcurrent protection is performed on the winding on the basis of a detection value of the winding current, demagnetization prevention can be performed even in consideration of a circulating current. In addition, the inverter control can be prevented from being affected by the circulating current in delta connection. Therefore, the number of current detection elements can be suppressed, and overcurrent protection and control can be performed appropriately.
Inventors:
TOYODOME SHINYA (JP)
YAMAKAWA TAKASHI (JP)
ARISAWA KOICHI (JP)
UEMURA KEISUKE (JP)
IWAZAKI KENJI (JP)
YAMAKAWA TAKASHI (JP)
ARISAWA KOICHI (JP)
UEMURA KEISUKE (JP)
IWAZAKI KENJI (JP)
Application Number:
PCT/JP2016/082201
Publication Date:
May 03, 2018
Filing Date:
October 31, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P25/18
Foreign References:
| JPH11252986A | 1999-09-17 | |||
| JPH0651803A | 1994-02-25 | |||
| JP2010246210A | 2010-10-28 | |||
| JP5611496B1 | 2014-10-22 |
Attorney, Agent or Firm:
MAEDA Minoru et al. (JP)
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