Abstract: To provide a coil type voice coil motor, the rigidity of the movable coil of which is high. A voice coil motor of the movable coil type includes: a stator 1 of a permanent magnet 3 which becomes a magnetic field; and a movable element (7) of an armature coil (6), wherein the armature coil (8) is formed into a coil-shape having a cavity portion (5), and a reinforcing beam (10) made of non-magnetic and highly rigid material is formed at a substantial center of the cavity portion (5). Due to the above constitution, the reinforcing beam (10) prevents the coil from being deformed. Therefore, the rigidity of the movable coil can be greatly enhanced.

Abstract: In a linear motor, a can has a two-layer structure including an inner can 2 and an outer can 3, and an inner passage 7 formed between an armature winding 9 and the inner can 2 and an outer passage 8 formed between the inner can 2 and the outer can 3 are constituted by each can. Communicating portions 7A and 8A for causing the inner passage 7 and the outer passage 8 to communicate with each other are provided in the vicinity of a refrigerant supply port 5 in each of the cans 2 and 3 in such a manner that a refrigerant supplied from the refrigerant supply port 5 branches into the inner passage 7 and the outer passage 8 and thus flows. Consequently, it is possible to obtain a linear motor armature and a linear motor having a high cooling capability which can prevent the deformation of the can by using a conventional inactive refrigerant to improve the passage for the refrigerant.

Abstract: A canned linear motor such that increase of the temperature of the mover is suppressed, the viscous damping force is reduced, and the strength of the can does not deteriorate. A canned linear motor comprises two parts, in one of which a permanent magnet is provided as a field system and in the other of which a three-phase armature winding, a winding fixing frame for supporting the armature winding, a coolant passage through which a coolant for cooling the surface of the armature winding passes, a can (14) covering the armature winding and the coolant passage, and a header (14′) for sealing the can. Slits (151, 152) extending in the direction of travel and parallel to each other are formed in the can (14).

Abstract: A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 &mgr;m existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.

Abstract: A canned linear motor such that increase of the temperature of the mover is suppressed, the viscous damping force is reduced, and the strength of the can does not deteriorate. A canned linear motor comprises two parts, in one of which a permanent magnet is provided as a field system and in the other of which a three-phase armature winding, a winding fixing frame for supporting the armature winding, a coolant passage through which a coolant for cooling the surfaced of the armature winding passes, a can (14) covering the armature winding and the coolant passage, and a header (14′) for sealing the can. Slits (151, 152) extending in the direction of travel and parallel to each other are formed in the can (14).