Asymmetric connecting wire balancing transformer and implementation method thereof
A technology for balancing transformers and implementation methods, which is applied in the directions of transformer/inductor cores, transformer/inductor coils/windings/connections, etc., and can solve problems affecting voltage waveforms, complex structures of windings and iron cores, and communication interference along the line.
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[0065] Example 1:
[0066] in figure 1 Among them, the primary winding is composed of three-phase windings AN, BN and CN, using star connection; the secondary winding is composed of A-phase windings ab and ea, B-phase winding bc, and C-phase windings ca and dc. Among them, ab, bc, and ca are connected into a closed triangle to form a path for the third harmonic current. The primary side A, B, and C form a three-phase system, and the neutral point N allows grounding; the secondary side e, b and d, b form a two-phase system, which can be supplied simultaneously or separately; [single-phase power supply directly at e, Two points b are connected with resistance; two-phase power supply is connected to two points d and b at the same time. Point b is a common point and is not called a ground point. 】The number of turns of the three-phase winding on the primary side is W 1 , The number of turns of the secondary winding ab, bc, ca and dc are all W 2 , The number of turns of ea is W 3 ....
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[0080] Example 2:
[0081] If the secondary winding is connected to the top, the midpoint is o point. A symmetrical two-phase system can be obtained from a1, c1 and b1, d1. A symmetrical four-phase system can also be obtained from a1o, b1o, c1o and d1o.
[0082] See Figure 5 with Image 6 The neutral point of the primary side is allowed to be grounded, and the secondary side leads from a1, c1, b1, and d1 to two symmetrical voltages with equal size and 90° phase difference to form a two-phase system. At the same time, four-phase symmetrical voltage can be obtained from a1o, b1o, c1o, and d1o to realize the function of three-phase to four-phase.
[0083] Picture 9 The three-phase current waveform diagram of the primary side when the four-phase side of this wiring is equipped with a balanced load. Picture 9 .a shows that the three-phase current waveform is uniform and symmetrical, Picture 9 .b and Picture 9 .c indicates that the three-phase current has neither zero sequence curre...
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