Product Description:

The SERVOSTAR-346 is an AC servo drive produced by Kollmorgen within the S300 Servo Drives series. Installed between the mains supply and a synchronous or induction motor, the drive modulates voltage and current to regulate speed, torque, and position in industrial automation lines such as packaging, material handling, and robotics. It is intended for closed-loop motion tasks that require consistent response during acceleration, deceleration, and steady-speed operation. Continuous power draw from the supply is 5 kVA.

At 400 V operation, the converter allows a rated output current of 6 Arms, while momentary demands can reach a peak of 12 Arms. Both values are delivered with an output current form factor of 1.01, which keeps RMS-to-average deviation minimal. The DC link can rise to a maximum of 900 VDC, and an overvoltage trip is initiated at 800 VDC to protect connected components. Switching devices pulse at 8 kHz under normal load and at 16 kHz in reduced-current mode, producing a residual voltage drop of 5 V across the inverter stage. Motor compatibility requires a minimum inductance of 5.6 mH at 400 V, and the bus voltage can change at a rate of 5.7 kV/µs without exceeding insulation limits.

The SERVOSTAR-346 incorporates an internal brake resistor rated at 91 ohms with a dissipation capacity of 50 W. It absorbs regenerated energy during rapid deceleration, so external hardware is optional in many applications. During regular running, the unit releases 90 W of heat, falling to 12 W when the drive is disabled, and these values indicate enclosure ventilation requirements. A maximum of 30 switching cycles per hour is permitted for full-power start-stop sequences to avoid thermal stress on the semiconductor bridge. When commanded to reduced current, the device still maintains fixed timing between pulses, and the residual voltage at the output supports predictable dynamic braking.