Product Description:

The 60WKS-M240/22-PO is an analog servo amplifier produced by Kollmorgen and supplied within the 60WKS Analog Servo Amplifiers series. It interfaces between a motion controller and a brush-type or brushless DC motor, converting low-level command signals into the high-current pulses required for industrial positioning axes, pick-and-place heads, and packaging drives. By closing the current loop internally, the unit ensures that commanded torque is delivered to the motor without the latency associated with external power stages, making it a compact building block for medium-power automation.

The amplifier operates from a DC bus rated at 240 VDC and can deliver a continuous motor current of 22 A, rising to a peak of 50 A for rapid acceleration events. A closed-loop bandwidth of 1 kHz maintains current regulation accuracy, and the output stage clocks at 8.5 kHz to minimize audible switching noise while controlling eddy-current loss. For bus protection, an overvoltage trip is set to trigger at 325 V. Thermal design accommodates 140 W of dissipation at rated current, while quiescent dissipation is limited to 12 W during standby. The installed load on the facility supply reaches 3.7 kVA, and voltage drop across the output devices is kept to 5 V to preserve motor headroom. Three 20 A maximum AC fuses protect the incoming mains.

Energy that reenters the DC link during braking is absorbed by an internal ballast resistor rated for 135 W continuous and up to 5.4 kW in short pulses. It switches on when the bus reaches 300 V and disengages below 285 V. The current path is stable with motors whose phase inductance is at least 0.7 mH, preventing ripple that could distort torque production. Overall power loss is constrained by a 140 W figure, and the amplifier’s 12 W idle draw simplifies cabinet cooling requirements.