Title:
MOTOR CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2014128146
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent the time required until normal operation of a motor from being prolonged by detection of an open-phase fault or a short-circuit fault.SOLUTION: A gate drive circuit 53 performs DC electrification by setting an inverter circuit 30 to a first switching mode in the case of DC excitation when starting a fan motor 22 and then performs DC electrification by setting the inverter circuit 30 to a second switching mode different from the first switching mode further during the DC excitation. A current detection section 52 detects a first current flowing in the inverter circuit 30 under the first switching mode and a second current flowing in the inverter circuit 30 under the second switching mode. A fault detection section 55a performs fault detection by using the first current and the second current.
Inventors:
SATO TOSHIAKI
Application Number:
JP2012284329A
Publication Date:
July 07, 2014
Filing Date:
December 27, 2012
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
H02P6/12; H02P6/06; H02P6/08; H02P6/16; H02P6/17; H02P6/18; H02P6/182; H02P21/14; H02P21/16; H02P21/18; H02P21/24; H02P21/36; H02P23/14; H02P27/06
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation