DOUBLE WALLED STATOR HOUSING

A double walled stator housing includes a first stator housing wall (114), a second stator housing wall (116) located radially outward from the first stator housing wall (114), and an air gap (115) located between the first and the second stator housing walls (114, 116). The housing also includes at least one support structure (118) attached to the first stator housing wall (114) and the second stator housing wall (116), spanning the air gap (115) and configured to minimize heat transfer between the first wall and the second wall.