11BRW-300-B10 Danaher
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The Danaher 11BRW-300-B10 resolver belongs to the Dynapar Resolvers series and operates at a single speed. It features an input voltage of 12.0 Vrms, input current of 10.9 mA, and input frequency of 400 Hz. The resolver has a transformation ratio of 1.75 and a null voltage of 30 mV.
Internal Product Review
The 11BRW-300-B10 is a well-engineered Danaher Dynapar resolver configured with a stator primary winding and single-speed operation. Input requirements of 12.0 Vrms and 400 Hz support straightforward integration into established motion-feedback circuits. A low 30 mV null voltage stands out as a strong indicator of accurate signal quality.
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Product Description:
The 11BRW-300-B10 resolver is supplied by Danaher and is part of the Dynapar Resolvers series. As an electromechanical sensor, it converts shaft position into analog sine and cosine signals for closed-loop motion control. A drive or controller interprets these signals to determine the absolute mechanical angle of a servomotor or rotary actuator in demanding industrial automation applications.
The reference excitation applied to the primary winding must be 12.0 Vrms. This voltage provides a clean carrier that avoids core saturation while maintaining a good signal-to-noise ratio. During operation, the resolver draws only 10.9 mA, so it places a minimal load on the excitation driver and keeps self-heating low. It accepts a carrier frequency of 400 Hz, providing a response that remains above most mechanical vibration frequencies while avoiding frequencies that would complicate drive filtering. The transformation ratio of 1.75 indicates that each secondary output reaches 1.75 times the primary amplitude at peak coupling. This ratio allows the resolver-to-digital converter to process the output without requiring excessive signal amplification.
Residual error at the electrical zero crossing is limited to 30 mV, allowing the control system to detect the null point without excessive offset compensation. Electrical quadrature separation has a phase shift of 12°, which the converter algorithm must account for when calculating accurate angle data. The primary winding is located on the stator, concentrating excitation flux in the stationary element and allowing direct connections without slip rings. The unit is a single-speed resolver that produces one electrical cycle during each mechanical rotation. This configuration provides a direct 1:1 relationship between the shaft angle and resolver output. The resulting sine and cosine waveforms allow the connected controller to track angular position continuously throughout a complete revolution.
