Title:
METHOD AND APPARATUS FOR DETERMINING POSITION FOR A PERMANENT MAGNET ELEVATOR MOTOR
Document Type and Number:
WIPO Patent Application WO/2015/006283
Kind Code:
A3
Abstract:
A system for determining the angular position of a synchronous motor includes an encoder with a friction wheel engaging a rotating surface of the motor. The friction wheel is spun by the rotation of the motor, and the encoder generates a signal corresponding to the angular position of the friction wheel An independent sensor is provided to generate a pulse once per revolution of the motor. The independent sensor detects the presence of a target on the rotating surface of the motor and generates the pulse when the target is proximate to the sensor. A controller receives the signal corresponding to the angular position of the friction wheel as well as the pulse generated by the independent sensor to determine the angular position of the motor. The controller compensates the angular position of the motor each time the pulse is generated, correcting accumulated position error.
Inventors:
BACKMAN JOHN (US)
ANDERSON GARRY (GB)
ANDERSON GARRY (GB)
Application Number:
PCT/US2014/045682
Publication Date:
October 29, 2015
Filing Date:
July 08, 2014
Export Citation:
Assignee:
MAGNETEK INC (US)
International Classes:
H02K11/00; B66B3/02; H02K29/06; H02K29/08; H02K29/12
Foreign References:
| US20050156550A1 | 2005-07-21 | |||
| US20110108369A1 | 2011-05-12 | |||
| US8198842B2 | 2012-06-12 | |||
| US6791219B1 | 2004-09-14 | |||
| US8446121B1 | 2013-05-21 | |||
| US20100133046A1 | 2010-06-03 |
Attorney, Agent or Firm:
SCHLEVENSKY, Eric, L. (S.C.840 North Plankinton Avenu, Milwaukee WI, US)
Download PDF:
Previous Patent: SYSTEM AND METHOD FOR RESERVATION INVENTORY MANAGEMENT
Next Patent: APPARATUS AND/OR KIT RELATED TO SMARTPHONE CASES
Next Patent: APPARATUS AND/OR KIT RELATED TO SMARTPHONE CASES