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:
Jan. 17, 1995
Filed:
Mar. 31, 1993
Klaus Uuskoski, Hyvinkaa, FI;
Kone OY, Helsinki, FI;
Abstract
An asynchronous motor is disclosed with stator and rotor windings placed in respective grooves, at least one of the windings being a cast winding. The grooves on the stator and those on the rotor are so inclined relative to each other that the groove inclination is approximately 60 to 90% of the pole pitch. In addition, to enhance the effect of the groove inclination, the stator and/or rotor is subjected, after the casting of the windings, to a heat treatment process in which the stator and/or rotor is heated to a high temperature and then cooled. The invention facilitates construction of an asynchronous motor having a reduced magnitude of generator torque of the motor and a changed rotational speed at which it occurs in relation to a conventional asynchronous motor.