High-stability, Current-controlled, Card-based, Unipolar, Switch-mode Power Converter for Electromagnets


The power converter is capable of delivering output voltage (up to 50 V DC), output current (up to 15 A DC), and output power (up to 300 W) ratings with minimum alterations. It operates from 230 V, 50 Hz ac mains. The power converter is developed on a single 6U double-sided PTH PCB, complete with power circuit, control electronics and interface electronics for its remote operation. It is equipped with precision current sensor, electronics and on-board constant-temperature bath that provides output current stability within +/- 100 ppm of the full-scale current (for 8 hours after 1 hour of warm-up). Further, a controlled electromechanical switch is provided at the output that facilitates the output polarity reversal. Important signals are available on the front panel facilitating in-situ diagnosis/monitoring of the operational status.

28 unipolar