An electric machine system including an alternating current (AC) electric machine. The AC electric machine includes a machine housing having a machine portion and a switch portion. A stator is fixedly mounted in the machine portion of the machine housing, and a rotor rotatably mounted relative to the stator. A switch assembly is arranged within the switch portion of the machine housing and electrically connected to the stator. The switch assembly includes a switch module having a switch member. The switch module is configured and disposed to be detachably mounted in the switch portion of the machine housing. A cooling system that includes an expandable coolant manifold is arranged in the switch portion of the machine housing. The expandable coolant manifold is fluidly connected to the switch module.