Patent ID: 7675395

Claim:
A method of cooling an electromagnet, the method comprising: providing an electromagnet comprising at least one spacer defining channels therein and a coil comprising at least one winding, the at least one spacer and winding each extending completely about a circumference of a core, the spacer having a first end and a second end spaced apart from one another along a longitudinal axis of the core, the channels extending non-parallel to the longitudinal axis of the core and between the first and second ends of the spacer, the winding comprising an inner surface and an outer surface, wherein the entire inner or outer surface of the winding extends adjacent to the spacer completely about the circumference of the core, wherein the electromagnet further comprises a first endplate defining an inlet and a second endplate defining an outlet, and wherein a housing extends circumferentially about the winding and spacer and between the first and second endplates such that the coil and spacer are enclosed; magnetizing the electromagnet by providing a current to the coil; and supplying a cooling medium into the inlet defined within the first endplate such that the cooling medium flows through the channels of the spacer in a direction non-parallel to a longitudinal axis of the core and out of the outlet defined within the second endplate, and wherein supplying the cooling medium cools the electromagnet.