Servo works with resolvers

Westwood, Mass. —Model 7227DC servoamplifier drives brushless ac motors to 1.5 hp. It is used in applications where the motor and its position sensor are exposed to adverse environments such as condensation, vibration, or temperature extremes where a resolver may be superior to an encoder. A built-in resolver-to-digital (R/D) converter is the key element. The R/D converter develops position/velocity data from the resolver and provides shaft position information for deriving sinusoidal U, V, and W motor commutation waveforms. The amplifier also derives analog dc position/velocity feedback from the converter’s output for servo loop stabilization. Copley Controls Corp.

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