Product Description:

The 11BRW-300-M10B is a brushless resolver produced by Danaher within the Dynapar Resolvers series. In motion-control architectures, the device converts shaft angle into electrical signals that drive controllers interpret as absolute position, enabling closed-loop speed or position regulation on servo stages, presses, and indexing tables. Its transformer-type construction provides dielectric isolation between the primary and secondary windings, so it tolerates the high common-mode noise levels found in industrial automation environments.

The excitation circuit applies 10.0 Vrms to the primary, and the resolver draws only 8.3 mA, so power consumption stays below 85 mW and cabling losses remain minimal. With an excitation frequency of 5000 Hz, the sensor’s inductive reactance is high enough to keep the magnetization current confined, which improves the signal-to-noise ratio when long cable runs are present. The primary is wound on the stator, leaving the rotor free of slip rings and extending service life under continuous rotation. A transformation ratio of 0.50 means the maximum secondary output is half the applied reference voltage, simplifying gain settings in typical resolver-to-digital converters while still providing sufficient amplitude for accurate demodulation.

At electrical null, the differential output is limited to 30 mV, indicating good coil symmetry and minimal quadrature error. The phase relationship between the reference and sine track shifts by -5 degrees, a predictable lag that downstream converters can correct with a fixed offset. Overall angle fidelity is rated at 7 arc-min, so the resolver introduces less than 0.12 degrees of error over one mechanical revolution, supporting fine positioning on gear-reduced axes. The single-speed resolver has a speed count of 1 and generates one electrical cycle per mechanical turn, allowing direct interpolation by most drives without ratio tables or multipole decoding.