Device for controlling a magnetic bearing and associated system

A device for controlling a magnetic bearing having an axis and first and second electromagnets diametrically opposed along the axis, the device comprising:

• a support;
• two power converters for the magnetic bearing, each power converter being configured to supply one electromagnet of the first and second electromagnets;
• at least eight power devices disposed on the support, the eight power devices being arranged in a first line and a second line, the first line and a second line being parallel, each of the first and second lines comprising at least four power devices, a first set of four power devices of the said at least eight power devices being connected together to form a first power converter of the two power converters, and a second set of four power devices of the said at least eight power devices being connected together to form a second power converter of the two power converters, each of the first and second lines comprise two power devices of the first set and two power devices of the second set, the four power devices of the first and second lines being arranged so that two adjacent power devices belong to different sets and so that the power devices at the extremities of the first line belong to a different set than power devices at the extremities of the second line.