Patent ID: 6244395
Filing Date: 2001-06-12
Classification: B60L,B65H,F16D,H02K,Y02T

Abstract:
An electromagnetic hysteresis brake, said hysteresis brake having; a stationary brake magnet having an inner pole ring; an outer pole ring that surrounds said inner pole ring so as to define an annular air gap between said pole rings; a magnetic winding that extends around said inner pole ring; and a rotating armature that is rotatingly mounted to said inner pole ring, said armature including a hysteresis ring of permanent magnetic material, wherein said hysteresis ring projects into the air-gap wherein: at least one permanent magnet extends circumferentially around said inner pole ring and is located adjacent said magnetic winding so that a magnetic flux extends circumferentially through the air gap and the magnetic flux is a combination of a magnetic flux of said magnetic winding and a magnetic flux of said permanent magnet.