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:
Jul. 08, 2003
Filed:
Mar. 09, 2001
Menachem Cohen, Jerusalem, IL;
Eyal Cohen, Tel Aviv, IL;
M.E.A. Motor Inspection Ltd., Netanya, IL;
Abstract
A method and system for dynamic testing of loaded or unloaded electrical rotating electric motors, wherein a dynamic speed-time characteristic of the electric motor is determined during acceleration of the motor from standstill to steady-state speed or after the motor has reached steady-state speed, depending on the performance characteristic to be derived, and analyzed to derive a performance characteristic of the electric motor. Accurate measurement of the motor speed may be achieved by attaching to the shaft a digital rotary encoder which generates successive HIGH and LOW logic levels during respective successive time intervals. The shaft is rotated and the respective periods of each successive logic level are accumulated so as to allow derivation of the angular rotation or a function thereof of the shaft. Dynamic performance may be determined accurately as well as steady-state performance without slowing the electric motor's speed of rotation by use of a flywheel.