BDS3-208/30-08-102 Kollmorgen
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The Kollmorgen BDS3-208/30-08-102 is a servo drive from the BDS Industrial Servo Drives series and operates on a 208 VAC 3-phase input. It features a velocity loop control mode, supports fully regenerative four-quadrant operation, and is compatible with PM brushless motors using a brushless resolver feedback device. The drive has a DC bus voltage of 300 VDC and uses a 100 A, 450 V sinewave power stage transistor.
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Product Description:
The BDS3-208/30-08-102 is a digital servo drive manufactured by Kollmorgen as part of the BDS Industrial Servo Drives series. It links a motion controller to a permanent-magnet brushless motor, converting incoming utility power into regulated current for precise speed control within automated machinery. The unit is intended for cabinet mounting next to PLC and safety hardware, providing a compact way to close the speed loop on packaging lines, pick-and-place gantries, and other repetitive positioning systems.
The drive operates under velocity-loop control, so the internal regulator compares the commanded speed with feedback and corrects deviations in real time. Energy for the power stage is stored on a 300 VDC bus, which supports rapid acceleration while remaining compatible with standard industrial insulation systems. The drive produces a sine-wave output, which minimizes torque ripple in the connected motor. Rotor position is monitored by a brushless resolver, allowing continuous operation in electrically noisy environments. The mains connection accepts a 208 VAC supply, matching many North American plant distribution systems without requiring a step-down transformer.
The input line requires a three-phase source, giving the rectifier a low crest factor and reducing harmonic stress on facility wiring. Current switching is handled by a 100 A, 450 V transistor set, providing electrical headroom for dynamic load changes. Motion is supported in all four speed-torque quadrants through four-quadrant operation. This arrangement allows the drive to motor and brake in either rotational direction without external reversing contactors. During overhauling loads, a fully regenerative system returns excess kinetic energy to the DC link instead of immediately dissipating it as heat. This energy transfer supports controlled deceleration when the connected load drives the motor faster than the commanded speed. The regenerative path also allows braking torque to remain available in both rotational directions during repeated acceleration and deceleration cycles.
