Patent ID: 7939973
Filing Date: 2011-05-10
Classification: H02K

Abstract:
1. A canned linear motor armature comprising: an armature winding constituted by a coil group including a plurality of formed coils formed in a flat plate shape; a metal-made chassis provided to surround the armature winding by a frame-like shape; and a can hermetically closing two opening portions of the chassis, wherein the coil group is interposed by a wiring board having a wiring portion and a resin-made frame of a bath tub shape, the frame being opened only at a face side of the wiring board, and a periphery of the formed coils surrounded by the wiring board and the frame is configured to be injection-molded by a mold or a potting resin with an object of promoting an insulation reliability of the formed coils against a refrigerant, and wherein a wiring portion with a connector for connecting from the canned linear motor armature to an outside of the armature as a power line or a signal line is injection-molded by a mold or a potting resin having a viscosity at an operating temperature equal to or smaller than 30 Pa·s, a usable time period equal to 0.1 through 24 hours, and an elastic modulus equal to or smaller than 3,000 MPa.