Connecting method for changing single star-triangle into double star-triangle in ac motor winding

Connecting method for changing single star-triangle into double star-triangle in ac motor winding

  • CN 1,082,740 C
  • Filed: 12/08/1994
  • Issued: 04/10/2002
  • Est. Priority Date: 12/08/1994
  • Status: Active Grant
First Claim
Patent Images

1. a single star-triangle that is used for pole-changing, starting, speed governing becomes the three phase alternating current motor winding of double star-triangle, contain two parts that are labeled as Y and △

  • , every 2 segments that are divided into mutually of Y part winding wherein, every segment all has two exits of initial and end, the contained coil number of every segment m (m=0,1,2 ...);

    Every phase of △

    part winding also is divided into 2 segments, every segment also all has head, two exits of tail, the contained coil number of every segment is n (n=1,2,3,) Y and △

    two parts respectively contain 6 segments, contain 12 segments altogether, its connecting method is;

    wherein 6 segment windings of △

    part join end to end to connect by three phase sequences and become a three-phase △

    shape closed circuit with 6 nodes, and then with an exit of each segment in the Y part 6 segment windings, also connect mutually with 6 nodes that above-mentioned three-phase △

    shape connects respectively successively by three phase sequences, 6 exits that Y part 6 segment windings are other, be labeled as D1 in order respectively, D2, D3, D4, D5, D6, promptly as the external exit of whole three-phase winding, as exit D1, D3, D6 inserts the three phase network power supply, other three exit D2, D4, when D6 is unsettled, obtaining its number of poles is the winding of single star-triangle connection of Q, and as exit D1 and D4, D3 and D6, drop into the three phase network power supply after D5 and D2 are bound up respectively, then obtain the winding that another kind of number of poles is double star-triangular configuration of P.

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