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Brushless dc servomotor

02 July 2008

EMS have expanded their range of precision drives with the addition of Smartshell; a new brushless motor series from Minimotor SA. The Smartshell is a conventional brushless dc servomotor based around the system Faulhaber self-supporting skew wound coil, but with a unique advanced construction. The coil, PCB, laminated stack and front-end cover are all encapsulated together in an injection moulded LCP (Liquid Crystal Polymer), giving outstanding mechanical and thermal features, and in combination with the Neodymium rare earth magnets, superior dynamic performance. The monolithic design ensures a simple, compact and very robust stator is guaranteed. The anodised aluminium front and rear motor covers provide the optimum location for pre-loaded ball bearings, a secure mounting fixture in the application and ensure excellent heat dissipation.

The modular construction gives this motor real versatility. The entry-level motor is sensorless, and so is ideal for demanding drive applications where precise speed control is required. If more sophisticated motion control is required, then the motors can be equipped with a hall sensor module with either digital or analogue sensors.

The series is available from Ø 15-22mm with a power range up to 31W. The low rotor inertia and impressive acceleration delivers speeds up to 62,000rpm. Complimentary drive electronics and the comprehensive range of Minimotor gearheads enables optimisation of the drive to meet the most demanding applications.


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