R911276493 (MDD090C-N-030-N2L-110PR0)

How does the motor’s winding resistance of ~0.46 Ω at 20 °C affect its heating and efficiency during continuous operation?

Higher resistance leads to I²·R losses, so under heavy continuous load the motor will heat significantly; good cooling (natural or surface) and accurate current control are important to avoid thermal drift or damage. Resistance will also rise with temperature, reducing torque output slightly and increasing losses.

What practical effect does the absence of a blocking brake have for machine safety and holding torque?

Without a blocking (or holding) brake, the motor cannot indefinitely hold a vertical load in position when power is lost; external mechanical brakes or counterbalances will be needed for safe stops or emergencies. For applications with frequent starts/stops or vertical loads, this increases system complexity.

How does the digital servo feedback (DSF) impact control performance compared to analog or resolver feedback?

DSF enables high resolution position/velocity control with faster commutation and lower jitter, improving responsiveness and reducing positional error, especially at low speed. However, it may require more complex wiring, shielding, and compatible controller electronics.

What limits the continuous torque at standstill (10.4 Nm) compared with the maximum theoretical torque (~56.3 Nm)?

The continuous torque at standstill is limited by thermal capacity, winding heating, and mechanical stresses; running at max torque continuously would overheat windings or bearings. The “maximum theoretical” torque is a short-term or peak value, often used during acceleration or intermittent load, not for long durations.

What impact does the motor’s inertia have on acceleration and deceleration in high-dynamic applications?

The motor’s rotor inertia acts against acceleration—higher inertia means slower acceleration/deceleration, requiring more torque or sophisticated control. For applications needing rapid direction changes or short cycle times, minimizing inertia (or using external coupling, gearing) matters.

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mdd090c-n-030-n2l-110pr0

The MDD090C-N-030-N2L-110PR0 motor by Bosch Rexroth delivers 10.4 Nm continuous torque and runs at 3000 min⁻¹, with digital servo feedback and a 110 mm centering diameter. It features a keyway shaft, shaft seal, and standard housing without a blocking brake. This motor is well-suited for automation roles in packaging, printing, and material handling industries.