QuickSilver Controls, Inc. recently extended their Mosolver (Motor + Resolver) technology into the compact 17 frame format.
The Mosolver sensor provides 32,000 counts of position information using a compact polyamide sensor coil placed within the stator opposite the rotor. The sensor is protected by the motor structure and does not need a separate housing. Magnetic in nature, it is not affected by dust or grease. The temperature range is limited by the motor ratings rather than by the sensor. The sensor, inherently aligned to the motor, provides both position and commutation information. When combined with the SilverSterling controller, a compact hybrid servo system provides high torque capability while eliminating low and mid speed resonances. True closed loop operation handles wide ranges of inertial loads.