Product Description:

The PRD-P303250z-35 is a compact servo amplifier produced by Kollmorgen within the SP Servostar Servo Drives series. The unit converts a fixed-frequency AC mains input into a controlled DC bus and high-frequency PWM output so a matched Kollmorgen servo motor can receive precise current and velocity commands. In automated manufacturing cells, the drive closes the torque loop locally while exchanging position, fault, and status data with the machine controller, making it a functional building block for axes that require synchronized motion.

Heat sinks and control electronics are sized for a continuous phase current of 3 Arms, allowing the drive to run a moderate-torque motor without thermal derating. For short moves or acceleration bursts, it can supply 9 Arms for 0.5 seconds before the current-limiting logic intervenes. Energy is metered through an intermediate link maintained at 325 VDC, and the capacitor bank reaches its operating voltage within 0.25 s after power-up because of the precharge circuit. Motor voltage is synthesized with insulated-gate transistors that switch at a 15.5 kHz PWM frequency. The high carrier frequency minimizes acoustic noise and reduces the current ripple reaching the motor windings.

Protection thresholds are integrated into the hardware and control logic. The bus is disconnected if regenerated energy raises the link voltage above 430 VDC or if the DC bus voltage falls below 90 VDC, helping protect the capacitors and control electronics. For applications with large inertial loads, a 20 Ω braking resistor rated for 200 W may be connected to the shunt terminals so excess energy is converted into heat rather than raising the bus voltage. The circuitry, connectors, and aluminum chassis have a combined weight of 1.61 kg, easing placement on a DIN rail inside a crowded control cabinet while providing sufficient mass for heat distribution under rated load.