11BRCX-300-C10/3 Danaher
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The Danaher 11BRCX-300-C10/3 is a resolver from the Dynapar Resolvers series with a primary rotor winding and a transformation ratio of 0.45. It operates with an input current of 15 mA and an input voltage of 6.0 Vrms at 1000 Hz. The resolver achieves a primary accuracy of 7 arc-min and features a phase shift of 4 degrees.
Internal Product Review
The 11BRCX-300-C10/3 is a Danaher Dynapar resolver engineered for stable feedback performance with 6.0 Vrms input voltage and 1000 Hz input frequency. Primary accuracy of 7 arc-min and total null voltage of 15 mV make the unit an excellent choice for precise motion-control applications.
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Product Description:
The 11BRCX-300-C10/3 is a rotary resolver produced by Danaher for the Dynapar Resolvers series. Integrated into servo drives and positioning systems, it converts shaft angle into balanced analog signals for precise motor commutation and closed-loop motion control in industrial automation. Its transformer-coupled design tolerates contamination and moderate vibration, allowing the device to preserve feedback integrity in environments that can challenge optical encoders. The resolver uses electromagnetic coupling rather than sensitive optical components, making it suitable for feedback applications inside industrial motors and other rotating equipment.
The resolver accepts an excitation signal of 6.0 Vrms with a current draw of 15 mA, allowing the controller to provide the required power to the primary coil. The carrier frequency is fixed at 1000 Hz, placing the reference above common control-signal bandwidths and simplifying signal filtering. Once energized, magnetic coupling produces secondary voltages according to a transformation ratio of 0.45, so each stator output remains below half of the applied reference amplitude. Electrical quadrature is maintained by a mechanical phase separation of 4 degrees between the sine and cosine channels. Positional fidelity is limited to a primary error band of 7 arc-minutes, providing subdegree accuracy for medium-resolution motion axes. Balanced output signals allow the connected controller to calculate shaft position while rejecting electrical interference that appears equally on both signal paths.
Residual imbalance at the electrical zero position is limited to a total null voltage of 15 mV, reducing offset errors that could otherwise propagate through the control loop. The unit has a single-speed configuration, so one mechanical revolution corresponds to one full electrical cycle. This relationship simplifies absolute angle decoding in standard servo drives because the electrical position follows the shaft through a direct one-to-one cycle mapping. The primary winding is placed on the rotor, and shaft rotation continually changes its angular relationship with the stationary secondary windings. Transformer coupling transfers the excitation without slip rings, allowing the stator leads to remain stationary and insulated from centrifugal forces. This arrangement supports installation inside sealed motor housings where direct electrical contact with a rotating winding would be impractical.
