FIELD: electrical engineering.
SUBSTANCE: invention relates to the area of electrical engineering, namely to power supplies for superconducting magnets. The magnet unit comprises a superconducting coil, a cryogenic system, a direct current voltage source, a switch mode power supply (SMPS), current leads and a controller. The cryogenic system comprises a cryostat and is configured to maintain the superconducting coil at an operating temperature below the critical temperature of the superconductor. The DC voltage source is a source located outside of the cryostat. The SMPS is located inside the cryostat and is configured to supply power from the DC voltage source to the superconducting coil. The SMPS comprises a step-down voltage transformer with a primary and a secondary windings. The current leads connect the DC voltage source to the SMPS. The controller is configured to cause the SMPS to supply a first power value to the magnet in order to accelerate the magnet to an operating current and a second power value to the magnet during a stable operation state of the magnet, wherein the first power value is greater than the second power value.
EFFECT: technical result is reduced size of current leads, complexity and heat leaking into the cryogenic environment of the magnet.
17 cl, 9 dwg
