The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2011
Filed:
May. 15, 2008
Method for detecting the loss of one or more phases in a permanent-magnet synchronous electric motor
Stefan Capitaneanu, Mousseaux Neuville, FR;
Fabrice Jadot, Pacy sur Eure, FR;
Ludovic Kermarrec, Evreux, FR;
Francois Malrait, Jouy sur Eure, FR;
Stefan Capitaneanu, Mousseaux Neuville, FR;
Fabrice Jadot, Pacy sur Eure, FR;
Ludovic Kermarrec, Evreux, FR;
Francois Malrait, Jouy sur Eure, FR;
Schneider Toshiba Inverter Europe SAS, Pacy sur Eure, FR;
Abstract
A method implemented in a speed controller to detect a loss of one phase, two phases or three phases in a three-phase permanent-magnet synchronous motor, running or stopped at rest, said controller executing a control in closed loop operation, said method including: determining, with the speed controller, a reference flux current as a function of a reference torque current, said reference torque current being calculated from a reference speed applied to the motor and a measurement of the speed or the position carried out on the motor; applying, with the speed controller, the reference flux current and injecting currents over various phases of the motor; and measuring, with the speed controller, the currents over at least two phases and determining the loss of one phase, of two phases or of three phases from these measured currents.