11BRCX-300-A-95-01 Danaher
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The Danaher 11BRCX-300-A-95-01 resolver is part of the Dynapar Resolvers series and uses a rotor as the primary element. It operates at an excitation frequency of 4000 Hz with an input voltage of 7.5 Vrms and an input current of 13.5 mA. The resolver features a transformation ratio of 0.54 and a total null voltage of 20 mV.
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Product Description:
The 11BRCX-300-A-95-01 is an electromechanical rotary sensor produced by Danaher within the Dynapar Resolvers series. As a brushless resolver, the unit couples a wound stator with a salient rotor to generate position-dependent analog signals for servo drives and numerical control systems. When excited with an AC reference, the device provides sine and cosine outputs proportional to shaft angle, allowing the drive to derive absolute position without fragile optical components.
An excitation carrier of 4000 Hz is applied across the resolver’s reference winding; this high frequency keeps the induced signal above typical drive noise bands. The exciter is driven with an input of 7.5 Vrms, a level that balances signal amplitude with core heating, while drawing only 13.5 mA from the drive’s reference source to minimize power loss. Once modulated by shaft rotation, the output magnitude follows a transformation ratio of 0.54, meaning the sine and cosine voltages reach 54% of the reference under ideal coupling. The system phasing has a -2° phase shift between the sine channel and the reference signal. This predictable shift allows the controller to compensate when calculating the shaft angle.
Residual error is characterized by a total null voltage of 20 mV. This value indicates the maximum differential between the sine and cosine channels when the shaft is centered, helping users evaluate alignment tolerance. The device uses a rotor with minimal inertia, allowing it to be rigidly bonded to high-speed motor shafts without significantly influencing rotational dynamics. Its 1-speed operation produces a single electrical cycle per mechanical revolution, simplifying angle interpolation in low-resolution control loops. Controlled production keeps these electrical parameters stable across temperature changes, supporting predictable feedback behavior throughout the operating range.
