11BRCX-300-J10C Danaher
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The Danaher 11BRCX-300-J10C is a resolver from the Dynapar Resolvers series. It features a 5000 Hz excitation frequency, 10.9 mA input current, and 7.0 Vrms input voltage. The resolver has a primary accuracy of 7 arc-min and a transform ratio of 0.95.
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Product Description:
The 11BRCX-300-J10C resolver belongs to the Dynapar Resolvers series from Danaher. As an electromechanical transducer, it converts shaft angle into sine and cosine voltage signals so that motion controllers can determine absolute angular position after a power cycle. In industrial automation, it is mounted on motor or load axes where high-temperature tolerance, noise immunity, and continuous rotational feedback are required for closed-loop speed and torque regulation.
The resolver operates with an excitation carrier of 5000 Hz. This frequency establishes the bandwidth for demodulated position signals, keeps interference outside typical servo-control frequency ranges, and supports transformer coupling across the long cable runs found on articulated machinery. Its reference winding requires 7.0 Vrms and draws only 10.9 mA, so drive electronics can energize it without a large power stage or excessive heat generation. A transformation ratio of 0.95 means the secondary amplitude is slightly lower than the reference amplitude, simplifying gain settings in the decoding circuit. The resolver has a primary accuracy of 7 arc-min, allowing precise alignment in medium-resolution positioning systems that require angular accuracy.
Complementary electrical characteristics support stable zero-crossing detection. A phase shift of -6° between the reference and output keeps the quadrature channels in predictable alignment for vector calculations. At balance, the resolver presents only 15 mV of total null voltage, minimizing offset errors when the shaft is near electrical zero. The primary winding is on the rotor, which reduces interwinding capacitance and improves dynamic response as the shaft accelerates or decelerates. The design has a speed code of 1, indicating compatibility with single-speed tracking algorithms used in standard resolver-to-digital converters. This arrangement allows the associated motion drive to process the resolver signals through a conventional single-speed decoding channel while monitoring angular changes throughout continuous shaft rotation.
