R911288211 (MHD115C-058-NG0-AA)

MHD Synchronous Motors

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The Bosch Rexroth MPN R911288211 (MHD115C-058-NG0-AA) is a synchronous servo motor featuring a strong torque-to-inertia mass ratio and efficient heat dissipation from the stator windings to the housing exterior. It provides digital servo feedback (HSF) with relative position detection and operates without a holding brake. The motor achieves a peak current of 371A and has a torque constant of 0.95Nm/A. Winding resistance is 0.06 Ohms, and the voltage constant is 86.4V/1000min-1 at 20°C. The rated frequency is 67Hz with natural convection cooling and 133Hz with surface cooling. It delivers a maximum theoretical torque of 231Nm, continuous standstill torque of 70Nm, and a power rating of 2.4kW at 60K. Dimensions include a 192mm flange size, 180mm centering diameter, plain shaft with shaft seal, and side A output power connection. Motor size is 115 and motor length is C. The unit weighs 55kg and is rated for a bearing service life of 30,000 operating hours according to ISO 281.