5.0 kW servo with integrated holding brake
The Mitsubishi Electric HG-SR502B is a 5.0 kW AC servo motor from the HG series, fitted with a holding brake — the brake static friction torque is 44 Nm, enough to hold a vertical axis load at rest without a mechanical counterbalance or external brake resistor. The moment of inertia is 109 J (×10⁻⁴ kg·m²) — this is a high-inertia rotor relative to the output power, which means the load-to-rotor inertia ratio stays manageable even with a heavy payload coupled directly. Expect the velocity loop to need a lower proportional gain than a low-inertia servo of the same power class.
Inertia and tuning — what the 109 J figure means for your axis
A 109 J rotor inertia paired with a 5.0 kW output places this motor in the medium-to-high inertia range — the inertia ratio between the load and the rotor is the dominant factor in settling time. If your load inertia is below 200 J (×10⁻⁴ kg·m²), the auto-tuning in the MR-J4 drive series will converge without manual notch filters. Above that, expect to dial in a low-pass filter on the velocity loop to keep the resonance below 200 Hz.
Active production — sourcing and lifecycle
The estimated lead time from the factory is 1–10 working days, though actual lead time depends on order volume and regional stock levels.