摘要：对电机用深沟球轴承的尺寸（型号）、游隙、润滑脂、密封方式的选择和轴承使用中的安装、配合、预紧、漆锈进行了分析，以期对电机制造者在轴承的选择和使用中有所借鉴。
Abstract: A solution for elevator door controller is presented in this paperThe controlunit is designed using the DSP TMS320LF2407A to implement the motor drive control and elevator door logic control,and the driveunit is designed using the IPM PS21563P to implement the power transformation and signal detectionBased on the running characteristic of elevator door,the ACI motor is controlled with VVVF and SVPWM technic,and the software system is finished with the elevator door logic control,openingclosing door curve calculation,doorwidth adaptive and other modulesThe experiment indicates that this elevator door controller is steady,safety and reliable
