11BRW-300-B-60 Danaher
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The Danaher 11BRW-300-B-60 is part of the Dynapar Resolvers series and has a primary winding on the stator. It operates with an excitation frequency of 400 Hz and an input voltage of 12.0 Vrms, drawing 10.9 mA. The unit has a phase shift of 12 degrees and a transformation ratio of 1.75.
Internal Product Review
The 11BRW-300-B-60 is a Danaher Dynapar resolver designed for stable position feedback with 400 Hz excitation frequency and 12.0 Vrms input voltage. Low 30 mV null voltage and a 1.75 transformation ratio support accurate signal conversion, a strong combination for precise motion control.
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Product Description:
The 11BRW-300-B-60 resolver is produced by Danaher for the Dynapar Resolvers series and serves as a passive rotary feedback device in industrial motion systems. By converting shaft angle into quadrature sine-cosine voltages, it supplies absolute position data to servo amplifiers, enabling closed-loop control of motors, indexing tables, and robotics. Its transformer-coupled windings isolate the sensor from electrical noise, and the absence of onboard electronics allows operation in high-temperature or high-vibration areas where optical encoders may not operate reliably. Standard flange dimensions and connector patterns allow the resolver to mount directly on motor end bells or mechanical actuators without custom adapters.
The resolver operates with an excitation carrier of 400 Hz that the drive supplies to the reference winding. With this carrier, it requires 12.0 Vrms at the terminals and draws only 10.9 mA, so the power demand on the drive’s low-voltage source is minimal. When the rotor aligns with the electrical zero, the measured differential between the sine and cosine outputs drops to 30 mV, providing a low null voltage for zero-offset calibration. At other angles, the analog signals shift while maintaining a fixed quadrature relationship. The electrical displacement has a calibrated phase difference of 12 degrees, allowing the controller to reconstruct the angular position at high resolution.
The primary reference winding is located in the stator, leaving the rotor free of slip rings and reducing mechanical wear during continuous operation. This model is classified as a speed 1 resolver, so one electrical cycle corresponds to one mechanical revolution and supports straightforward interpolation in digital drives. The sine or cosine output amplitude divided by the reference input follows a transformation ratio of 1.75, providing a predictable voltage envelope throughout the full rotation. The resolver is manufactured by Danaher and is designed for use with compatible industrial motion-control equipment.
