公开(公告)号：US3626220A

公开(公告)日：1971-12-07

申请号：US3626220D

申请日：1970-04-14

Applicant: UZINA DE MASINI ELECTRICE BUCU

Inventor： NICULESCU EUGEN

IPC: H02K7/12 ,  H02K7/10

CPC classification number: H02K7/125 ,  Y10S188/02

Abstract: Electric motor consisting of a stator, a cylindrical rotor and a brake. Both the stator and the rotor are provided with windings and are in functional relation one to another. The rotor may turn inside the stator being separated from it by a small airgap. The rotor consists of two concentric parts, that is, a central conical core, without winding and an outer crown, including the rotor winding, and having an inner hollow of the same conicity as the central core, the central core entering and filling the inner hollow. One of the two rotor parts is fixed and the other one is free for a small axial shifting with respect to the first one, the other part being also fixedly attached to the brake movable part. When the motor is not connected to the supply, it is braked, a small inner airgap delta '' being thus formed between the two rotor parts. When the motor is connected to the supply, the two rotor parts are brought into contact, the brake is unlocked, and the motor operates as a normal motor.