Product Description:

The BDS4A-203J-0014-202B83 is a digital servo drive produced by Kollmorgen for the BDS Industrial Servo Drives series. As a power stage for brushless servomotors, it regulates current, velocity, and position loops so automated machines can execute precise moves under varying loads. By converting a 250–360 VDC bus into sinusoidal phase voltages, the unit supplies tightly controlled torque for pick-and-place axes, packaging lines, and other coordinated motion platforms.

During continuous operation, the drive delivers 3.0 A RMS per phase, while short bursts of up to 6.0 A RMS per phase for 2.0 seconds handle acceleration spikes without loss of regulation. The nominal line-to-line voltage is 230 VAC, and the PWM bridge switches at 10.0 kHz to minimize current ripple. Internal logic resolves rotor position with a 14-bit resolver-to-digital converter, supported by an accuracy of 8 arc minutes, a 7 kHz resolver excitation signal, and a maximum electrical tracking rate of 3,500 rpm. The power stage tolerates supply variation by accepting 250 VDC at the lower limit and 360 VDC at the upper limit. This input range allows common rectified three-phase mains to feed the bus without additional voltage regulation.

Continuous output reaches 1.1 kVA with a 330 VDC bus, and the drive handles transient output of up to 2.2 kVA with a 330 VDC bus before protective foldback engages. An internal power loss of 40 W must be removed by cabinet airflow to keep the heat sink within its operating limit. The housing stands 340 mm tall, 60 mm wide, and 280 mm deep, allowing multiple axes to be installed in a compact cabinet arrangement. Its narrow width helps conserve lateral panel space, while the depth and height must be considered when setting enclosure clearances. Adequate spacing around the heat sink is necessary to maintain airflow during continuous operation.