Product Description:

The SERVOSTAR-341 is a servo drive produced by Kollmorgen within the S300 Servo Drives series. It converts three-phase 400 V mains power into a regulated output that controls the torque, speed, and position of brushless servo motors used in packaging lines, pick-and-place axes, and general machine automation. The DC bus can rise to 900 VDC, providing the power stage with sufficient headroom to accommodate line variations and energy returned during rapid deceleration. This regulated architecture allows the drive to manage dynamic motor loads while maintaining controlled motion across demanding operating cycles.

A peak phase current of 4.5 Arms is available for short acceleration periods, while continuous operation is limited to 1.5 Arms to keep the drive within its thermal limits. The rated input is 1.2 kVA, allowing appropriate fusing and supply wiring to be selected for the installation. Pulse-width modulation operates at 8 kHz, enabling the current loops to respond quickly without causing excessive switching losses. The motor must have a minimum inductance of 14.8 mH to help prevent overcurrent faults at this carrier frequency. A residual voltage drop of 5 V across the transistors has only a minor effect on calculations involving the motor’s back electromotive force.

An alternate carrier frequency of 16 kHz can reduce acoustic noise, although it also increases thermal dissipation. Overvoltage protection activates at 800 VDC, protecting the intermediate circuit when regenerative energy exceeds the capacity of the built-in 91 Ω brake resistor. Heat generation reaches 40 W during rated switching, so the enclosure cooling system must remove this heat in addition to the 12 W generated when the output stage is disabled. The drive withstands a voltage rise of 5.7 kV/µs at the motor terminals, helping keep insulation stress within accepted limits. The housing measures 70 mm wide, 171 mm deep, and 275 mm high. Its compact dimensions allow multiple axes to be installed side by side on a DIN rail without occupying excessive enclosure space.