Product Description:

The BDS4A-203J-0014\202A8 is a servo drive produced by Kollmorgen within the BDS Industrial Servo Drives series. It interfaces with a matched motor and feedback device to regulate torque, speed, and position in automated machinery such as indexing tables, pick-and-place axes, and web transport lines. By converting the rectified DC bus into a sinusoidal three-phase output, the unit supplies precise current to the motor windings and maintains commanded motion profiles under varying load and temperature conditions.

The drive delivers a continuous output current of 3.0 A RMS per phase, corresponding to an apparent output rating of 1.1 kVA. The DC link can rise to 360 VDC but must remain above 250 VDC when the full dynamic range is required. Inverter transistors modulate this bus into a maximum line-to-line output of 230 VAC, using a 10.0 kHz PWM carrier and a motor ripple frequency of 20.0 kHz to minimize audible noise. The speed loop can regulate shaft speeds as low as 0.25 rpm, while the temperature coefficient for speed regulation is 0.075%/°C. The internal power section dissipates 40 W during operation. Encoder signals are generated electronically for downstream controllers. An R/D converter continuously monitors the rotor angle and limits the position error to 8 arc minutes.

Peak transients of up to 6.0 A RMS per phase support rapid acceleration before the current folds back to its continuous level. The position feedback chain resolves angles with 14-bit granularity and tracks rotation at speeds up to 3500 rpm. The resolver uses an excitation carrier of 7.0 kHz, which maintains accurate analog signal transfer while remaining outside the PWM spectrum. During operation, the resolver feedback allows the controller to compare the measured rotor position with the commanded trajectory and adjust motor current as the mechanical load changes.