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Reversible motor

  • US 4,357,567 A
  • Filed: 10/15/1980
  • Issued: 11/02/1982
  • Est. Priority Date: 10/19/1979
  • Status: Expired due to Term
First Claim
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1. A reversible linear motor comprising a coil arrangement and a conductive body which are mounted so as to be movable one relative to the other, wherein the coil arrangement has three separate coils disposed adjacent the conductive body:

  • namely a pair of interconnected coils spaced from each other in the direction of said relative movement of the body and the coil arrangement, and a third coil between the pair of coils, the coils being arranged for connection to a single phase a.c. supply, and reversing means being provided for reversing the connection of the third coil, or the interconnected pair of coils, relative to the supply, and wherein the two outer coils are substantially identically would coils of opposite hand interconnected via a tuning capacitor to give a singly tuned pair, and the central coil is predominantly inductive, whereby the magnetic fluxes of the two outer coils are anti-phase to each other (180°

    apart) and the pase of the magnetic flux of the central coil lies between the outer coils (spaced by 90°

    from each coil).

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