| 摘要 |
1,184,641. Core constructions. WESTING- HOUSE ELECTRIC CORP. 9 Oct., 1968 [7 Dec., 1967], No. 47851/68. Heading H2A. [Also in Division H1] Oriented polepieces for permanent magnet members 6-9 of a dynamo electric machine having a frame 5 are provided by filling cavities 30 within the frame 5 with a hardenable, non- magnetic matrix containing orientable ferromagnetic particles, establishing a magnetic field whose lines of force pass through the members 6-9 and matrix, and fixing the matrix with the particles oriented to the field. As shown, ferrite slots 6-9 are located by pins 26 and members 27, 28 fixed to the base of a die. A further frame 33 carrying cores 34, 35 and winding 36 establishes the magnetizing field for the members 6-9 and filler. The filler may comprise a hot thermoplastic, a cold powder, a castable liquid resinous plastic such as epoxy, or a thermosetting phenolic resin, all containing iron particles of typical dimension 0.06 ins and being cured under heat and pressure. The magnets 6-9 may be irregularly shaped and are of strontium, barium or lead ferrites. |
