Magnavolt - Magnet power supplies, linear controlled from +/-6.5V to +/-350V, +/-0.1A to +/-120A. Fast programmable, constant current, continuous zero crossing, 4-quadrant operation.

Fug Elektronik - German manufacturer of cryomagnet charging power supplies.

Cryomagnetics - SPS-Series Power Supplies for Superconducting Magnets

American Magnetics, Inc. - AMI manufactures superconducting magnet systems and cryogenic level instrumentation, and power supplies for charging the magnets.