公开(公告)号：US3866100A

公开(公告)日：1975-02-11

申请号：US36524173

申请日：1973-05-30

申请人： SPERRY RAND CORP

发明人： PALENCHAR DANIEL P ,  LEHKER WAYNE H ,  LOCK DAVID P

IPC分类号： H02P25/10 ,  G05B11/14

CPC分类号： H02P25/10 ,  G05B2219/42212

摘要： A motor control circuit is provided for controlling the acceleration, speed, deceleration, stopping and direction of rotation of a drive motor which drives a mechanized filing cabinet. The control circuit is packaged so that it may be connected through electrical connectors to the drive motor, safety interlocks, and automatic and manual controls available on existing mechanized filing cabinets. It may be used with existing mechanized filing cabinets having manual, automatic, or both manual and automatic controls for driving the carrier bins in a cabinet in the shortest direction around an orbital path to a position opposite an access door. Under automatic control, the drive motor is accelerated to a fast speed and maintains this speed until the desired carrier bin approaches the access door. The drive motor is then driven at a slower rate as it comes into the desired position. A two-step braking circuit stops the motor in such a manner that the contents of the carrier bins are not thrown about. A feedback signal from the motor is used to regulate the speed of the motor and prevent excessive speed when an unbalanced load is carried in the carrier bins. Circuits are provided for preventing the inadvertent application of a reverse voltage to the motor while it is rotating.