An elevator car door system for opening and closing elevator car doors (12) in an elevator car includes a high performance linear induction motor having a pair of movable motor primaries (16) attached to a respective door hanger (14) of each door, and a stationary motor secondary (18) attached to a header bracket (20) which is secured to the elevator car. Each motor primary includes a primary winding (24) and a backiron (26) spaced apart by a plurality of spacers (28) that establish a magnetic gap (40) therebetween. The motor secondary fits between the primary winding and the backiron as the moving motor primaries travel across the motor secondary, generating thrust. <IMAGE>
申请公布号
DE69729256(D1)
申请公布日期
2004.07.01
申请号
DE1997629256
申请日期
1997.10.31
申请人
OTIS ELEVATOR CO., FARMINGTON
发明人
KOWALCZYK, THOMAS M.;RIVERA, JAMES A.;TRACEY, MICHAEL J.;KING, WILLIAM L.;SWAYBILL, BRUCE P.;REDDY, NARASIMHA