Product Description:

The BDS4A-203J-0096/102B2 servo amplifier is produced by Kollmorgen as part of the BDS Industrial Servo Drives series. It converts a regulated DC bus into three-phase sinusoidal power for brushless servo motors used in positioning tables, pick-and-place heads, and other industrial automation axes. The drive monitors motor feedback through a resolver interface and adjusts pulse-width modulation to keep speed and torque within commanded limits while maintaining the compact dimensions and natural-convection cooling preferred in cabinet installations.

Under continuous duty, the amplifier delivers 3.0 A of phase current, corresponding to an output capability of 1.1 kVA. This current is synthesized as a 230-volt line-to-line waveform; therefore, the nominal motor terminal voltage is 230 VAC. Modulation uses a carrier frequency of 20.0 kHz, while the internal gate pattern is updated at a separate control carrier frequency of 10.0 kHz. These frequencies help minimize audible noise and reduce torque ripple. The current form factor is held to a maximum of 1.01, indicating that the RMS and average values are nearly identical and that winding heating remains close to the calculated value.

During transient acceleration, the drive can supply 6.0 A for short intervals, allowing a peak apparent power of 2.2 kVA to overcome inertia and friction. The power stage operates from a DC link that may vary between 360 VDC at full charge and 250 VDC during regeneration or line sag, and the control logic maintains stable output across this range. Convection cooling removes 40 W of internal heat dissipation without fans, supporting quiet panel operation. Resolver feedback is excited at 7.0 kHz and provides a maximum accuracy of 8 arc-minutes. The system supports speed regulation of 0.075% per degree Celsius to compensate for temperature-related drift during continuous operation.