11BRW-300-B60 Danaher
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The Danaher 11BRW-300-B60 is part of the Dynapar Resolvers series and features an input voltage of 12.0 Vrms and input current of 10.9 mA. This resolver operates with an input frequency of 400 Hz, has a phase shift of 12 degrees, and a transformation ratio of 1.75.
Internal Product Review
The 11BRW-300-B60 is a Danaher Dynapar resolver engineered for stable feedback performance with 12.0 Vrms input voltage and 400 Hz input frequency. A low 30 mV total null voltage and 1.75 transformation ratio support accurate signal conversion, making this resolver a strong choice for precision motion-control systems.
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Product Description:
The 11BRW-300-B60 is a brushless rotary resolver produced by Danaher as part of the Dynapar Resolvers series. Intended for industrial automation, it transforms the shaft angle into two quadrature sine-cosine signals that drives and motion controllers interpret as absolute position. The component’s transformer architecture tolerates oil, dust, and high temperatures, so it can be mounted directly on servomotor housings or gearboxes without requiring an optical line of sight. By providing continuous position feedback across power cycles, the unit supports precise commutation, homing, and velocity regulation in packaging, textile, and robotic equipment.
The resolver’s reference winding is energized with 12.0 Vrms excitation at 400 Hz, producing the magnetic flux needed for accurate coupling between the stator and rotor windings. At this excitation level, the device draws only 10.9 mA, keeping power dissipation low enough for use in a sealed motor enclosure without dedicated cooling. A turns ratio of 1.75 between the primary and secondary windings establishes the amplitude relationship that control electronics use to calculate the absolute angle after demodulation. Its transformer-based sensing method avoids the lenses, light sources, and optical paths found in optical encoders, allowing dependable feedback in machinery exposed to airborne particles or lubricant residue.
Signal behavior includes a fixed phase offset of 12 degrees between the induced voltages, allowing deterministic quadrature decoding in servo drives. At null, the differential output does not exceed 30 mV, limiting offset errors when the shaft crosses electrical zero. The primary winding is located in the stator, which promotes thermal stability by anchoring the copper winding to the motor frame. An electrical speed index of 1 indicates single-speed operation, making the resolver suitable for standard two-pole commutation schemes without complex harmonic filtering. The analog sine-cosine outputs allow the connected controller to determine angular position continuously rather than relying on discrete pulses, which supports smooth speed estimation at low shaft velocities.
