| 摘要 |
Linear and planar motors, as exemplary electromagnetic actuators, are disclosed that have at least one actively cooled coil assembly. An exemplary assembly includes a coil having first and second main surfaces. Also included is a respective thermally conductive cooling plate in thermal contact with at least one main surface of the coil. A coolant passageway is defined in or on each cooling plate, and a liquid coolant passes through the coolant passageway. The coolant passageway has a primary pattern that is coextensive with at least part of the main surface of the coil. The primary pattern can include a secondary pattern producing coolant flow through the coolant passageway in a manner that reduces eddy-current losses in the cooling plate. The coolant passageway desirably includes. An exemplary secondary pattern is serpentine. An exemplary primary pattern is radial or has a radial aspect, such as an X-shaped pattern. The devices provide more effective cooling, with better reliability and ease of maintenance, and reduced eddy-current drag than conventional actuators. |
