Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WASHING MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/065388
Kind Code:
A1
Abstract:
A control unit of a washing machine in the present disclosure enables execution of a sensorless open-loop acceleration control process that is a first control process for turning on electricity to windings (4a, 4b, 4c) independently of the position of a permanent magnet (4d), and a sensorless phase estimation control process that is a second control process for turning on electricity to the windings (4a, 4b, 4c) in accordance with the position of the permanent magnet (4d). The control unit also enables execution of a sensorless phase estimation control process that is a lock detection process for detecting, after transition from the first control process to the second control process, that the permanent magnet (4d) is locked and not rotating at a prescribed number of rotations. The control unit furthermore performs a phase-fixing control multiple times in different phases at the start of driving by the first control process when it is detected in the lock detection process that a motor (4) is locked.

Inventors:
FUJIOKA HIROTOSHI
ASADA KAZUHIKO
HORIBATA HIROSHI
UETAKI TADASHI
Application Number:
PCT/JP2020/034048
Publication Date:
April 08, 2021
Filing Date:
September 09, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
D06F33/74; D06F33/47; D06F34/14; D06F103/24; D06F103/44; D06F105/46; D06F105/50
Foreign References:
JP2011019399A2011-01-27
JP2005204431A2005-07-28
JP2000262090A2000-09-22
JP2011104197A2011-06-02
JPH11169582A1999-06-29
JP2010029046A2010-02-04
JPH0698584A1994-04-08
JP2018023208A2018-02-08
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
Download PDF: