PSR3-230/50-07-003 Kollmorgen
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The PSR3-230/50-07-003 is a servo power supply manufactured by Kollmorgen and is part of the PSR Servo Power Supplies series. It supports a main input of 3-phase power and has a current rating of 50 amps per phase. The unit operates with a nominal bus voltage of 325 VDC and can power up to 6 amplifiers.
Internal Product Review
The PSR3-230/50-07-003 is a Kollmorgen servo power supply well suited for disciplined servo power distribution. A 3-phase main input and 325 VDC nominal bus voltage give the platform stable DC bus performance for demanding motion systems. Support for up to 6 amplifiers makes the design an especially capable centralized power source.
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Product Description:
The PSR3-230/50-07-003 is a servo power supply produced by Kollmorgen for the PSR Servo Power Supplies series. It converts three-phase mains power into a regulated DC bus that feeds multiple AKD or other compatible Kollmorgen servo amplifiers, allowing coordinated axis motion in industrial automation lines. The common power source supports multi-axis systems without requiring a separate supply for every connected amplifier. Its compact design also helps conserve space within crowded control cabinets.
The control section is energized from a single-phase input of 115 VAC, keeping auxiliary wiring simple and isolated from the main three-phase feed. A bus capacitance of 0.0044 F stores charge that smooths line ripple and supplies transient current to connected drives. Under nominal conditions, the supply holds the link voltage at 325 VDC, which matches the operating range of compatible Kollmorgen amplifiers and reduces switching losses. Each phase can deliver up to 50 amperes per phase, providing substantial current for simultaneous motor acceleration. When the load is light, the bus voltage can rise but is limited to a ceiling of 385 VDC to protect downstream components.
Regenerative energy from braking motors is dissipated by an internal resistor bank that handles 300 W through a calibrated resistance of 7.5 Ω. The chopper circuit activates when the DC link reaches 365 VDC and disengages after the voltage falls below its hysteresis band, preventing rapid switching and keeping semiconductors within safe operating limits. Up to six amplifiers can be powered simultaneously, and input deviations within ±10% do not interfere with voltage regulation. Continuous operation is permitted from 0 to 55 °C. An integrated fan provides forced-air cooling, while the cold-plate path transfers heat through the mounting surface. The available cooling paths allow the installation to use cabinet airflow or a suitable liquid-cooled mounting arrangement.
