Product Description:

The 41.SM.200-34CJ is a synchronous servo motor manufactured by KEB as part of the SM Synchronous Servo Motors series. This brushless unit is built for closed-loop operation with compatible drive controllers and supplies tightly regulated torque to position-controlled or velocity-controlled axes. By combining a permanent-magnet rotor with encoder feedback provisions, the motor is used on pick-and-place arms, indexing tables, and similar equipment where repeatability and cycle time are critical.

The motor is engineered for continuous operation at a rated phase voltage of 330 V. At this electrical point, it draws a phase current of 1.76 A. Under these conditions, the shaft reaches a synchronous speed of 3000 rpm while producing a steady output torque of 2.3 Nm. Thermal exchange is handled by a self-cooling design that relies on the spinning rotor to move air through internal passages, eliminating the need for external blowers. An enclosure rated IP65 blocks dust ingress and low-pressure water jets, so the motor can be mounted on machines without additional covers. Copper losses across the stator are limited by a winding resistance of 9.4 ohms, helping maintain temperature within insulation limits.

When the shaft is locked, the motor withstands a stall current of 1.92 A and delivers a holding torque of 2.6 Nm, giving added margin for static load conditions such as vertical axes. The voltage constant is 116 V/1000 rpm, meaning the controller must supply that back-EMF level per speed increment. A rotor inertia of 1.65 kg cm² balances acceleration capability with speed stability, allowing rapid indexing without overshoot. Electromagnetic energy storage in the windings is set by an inductance of 37.8 mH, which shapes current rise time during torque transients. To safeguard the bearings, the shaft gland is separately sealed to an IP64 level, helping prevent lubricant washout under spray conditions.