Product Description:

The VAC-MM30-22R-082W is a servo motor manufactured by Okuma as part of the VAC Servo Motors series. In automated machine tools and material-handling axes, this motor converts electrical energy into tightly regulated rotary motion so that position and velocity can be controlled by a drive. Its design pairs with Okuma inverter units to deliver closed-loop speed feedback and repeatable torque performance required in CNC machining centers and similar equipment. This arrangement suits feed axes, rotary tables, and other motion systems that require steady speed control and accurate response under changing load conditions.

The motor supplies a continuous mechanical output of 22 kW while drawing a continuous phase current of 131 A, and these figures show the thermal load that the accompanying drive and cabling must tolerate during steady operation. At its base speed of 1150 rpm, the shaft develops 182.4 N·m of torque, which allows direct calculation of spindle or gearbox ratios for constant-speed operation. Rotor position and speed are captured by a magnetic encoder, allowing the control loop to correct load disturbances without external sensors. This feedback arrangement also supports stable low-speed control and repeatable positioning after load changes. During operation, the acoustic output reaches 80 dB(A), which can influence enclosure sound damping in tightly enclosed machine spaces.

When extra power is required, the motor can reach a 30-minute rating of 30 kW. This short-term margin is possible because the windings can withstand an overload of 120% for 60 s before the motor approaches its thermal limit. The rated duty cycle of 50% ED indicates that equal periods of operation and rest are expected, which helps manage internal temperature rise in intermittent service. This operating pattern is common in axes that alternate between active motion and dwell periods. Dynamic response is influenced by a rotor inertia of 0.3375 kg·m², balancing acceleration capability against speed stability. The frame mass is 260 kg, and that weight helps damp vibration when the motor is mounted on a rigid machine structure.