11RC-300-B-1R Danaher
Wake Industrial LLC is not an authorized distributor of this product.
The Danaher 11RC-300-B-1R is a servo duty resolver in the Dynapar Resolvers series with a primary winding on the rotor and a primary accuracy of 7 arc-min. It operates with an input voltage of 7.5 Vrms, input current of 40.0 mA, and an input frequency of 4000 Hz. The resolver supports a maximum temperature range of 125°C and has a transformation ratio of 1.07.
Internal Product Review
The 11RC-300-B-1R is a Dynapar resolver engineered for servo duty and stable single-speed feedback. Primary accuracy of 7 arc-min with a low 15 mV null voltage supports precise position sensing in motion applications. A 4000 Hz input frequency contributes to dependable signal performance.
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Product Description:
The 11RC-300-B-1R is a resolver built by Danaher and grouped within the Dynapar Resolvers series. As a servo feedback element, the unit converts mechanical shaft position into precise electrical signals for closed-loop motion control in industrial automation. The device pairs with servo drives and controllers to measure angular displacement without relying on optical components, allowing operation where dust, oil, or vibration could make other sensor types unreliable. Its electromagnetic sensing method provides continuous angular feedback to the connected control system.
During operation, the resolver’s primary winding is located on the rotor, reflecting its construction as a servo-grade sensor. When excited, the rotor draws 40.0 mA at 7.5 V RMS, and the reference signal operates at 4000 Hz. These electrical conditions produce a magnetizing flux that the stator secondary windings modulate according to the shaft angle. Its servo-duty rating supports continuous position feedback rather than intermittent indexing. The transformation ratio of 1.07 establishes the amplitude relationship between the induced secondary voltage and the applied primary voltage, providing predictable scaling for the downstream converter. The resolver uses a single-speed configuration, so one mechanical revolution corresponds to one electrical cycle.
The resolver has a null voltage of 15 mV, which keeps the residual signal at the electrical zero point low and helps reduce interpolation errors in the converter. The phase relationship between the primary and secondary signals has an offset of -2 degrees, which the drive can compensate for when processing feedback. Mechanical accuracy is maintained within 7 arcminutes, supporting precise positioning on motion-control axes. The device tolerates ambient temperatures up to 125 °C, allowing installation near motors or gearboxes that generate substantial heat. Its resolver-based design also avoids the optical disks and light sources commonly affected by airborne contamination. Proper signal conditioning allows the sine and cosine outputs to be converted into stable position data throughout the shaft’s rotation.
