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:
May. 22, 1979
Filed:
Nov. 23, 1976
Ottmar Kreissl, Karlsfeld, DE;
Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft, Augsburg, DE;
Abstract
A method and apparatus test the characteristics of rotors for hysteresis motors. A rotor to be tested is placed in predetermined spaced relation adjacent a testing stator having a stator winding. Predetermined voltage at predetermined frequency is applied to the testing stator winding while the rotor is maintained at standstill. Preferably, such voltage and frequency are the rated voltage and frequency of the motor into which it is intended that the rotor being tested will be assembled. The current thereby produced in the stator winding is measured, and the measured current is compared with a predetermined reference. The reference is preferably the current measured in the testing stator winding under the same conditions using a reference rotor that has been tested in a running motor.