JPH041710Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to the winding of electromagnetic induction equipment, and in particular, the load and usage conditions of electromagnetic induction equipment such as three-winding transformers are This relates to winding arrangement when a constraint condition is added to the leakage impedance value.

In the case of such an electromagnetic induction device, the objective is to obtain an economically efficient electromagnetic induction device that satisfies the leakage impedance value between each winding. A three-winding transformer will be described above as an example of an electromagnetic induction device.

FIG. 1 shows an example of a leakage impedance equivalent circuit of a three-winding transformer. Now, the power supply side of this three-winding transformer is P, and the load sides are S and T. The S side load is a motor load, etc., and is a variable load that constantly starts and stops, and the T side load, on the other hand, is a lighting, If the load requires stable voltage, such as a computer, S
In order to minimize the influence of side load fluctuations on the T-side voltage, in Fig. 1, the T-side load voltage is E〓 _T = E〓 _O −, where the no-load voltage of power supply P is E _O . (I〓 ₁ Z〓 _P +I〓 ₃ Z〓 _T ) Also, from I〓 ₁ = I〓 ₂ +I〓 ₃ , E〓 _T = E〓 _O − [(I〓 ₂ +I〓 ₃ )Z〓 _P +I〓 ₃ Z〓 _T 〕 = E〓 _O − [I〓 ₂ Z〓 _P + I〓 ₃ (Z〓 _P + Z〓 _T )〕 In other words, the T side voltage increases due to the S side fluctuating load current I ₂
It is I ₂ Z _P that affects E _T , and if Z _P ≈0, the influence of S side load fluctuation can be completely eliminated on the T side.

[Prior art]

In order to satisfy these conditions, in a conventional three-winding transformer, as shown in Figure 2, the S-side winding 2 is wound, the power supply winding 1 is wound on the outside of the S-side winding 2, and the A winding arrangement in which the T-side winding 3 is wound is common. In Fig. 2, in order to obtain Z _P ≒ 0, it is necessary to satisfy the condition Z _S ≒ Z _T , and in order to satisfy this condition, the arrangement interval between power supply winding 1 and T-side winding 3 must be adjusted. d ₂ needs to be adjusted. If there are tap leads 4 of the winding 1 within the arrangement spacing d ₂ , it is necessary to include the electrically insulating distance from these tap leads 4, so d ₂ becomes even larger, causing an increase in the dimensions of the winding 3. However, it had the disadvantage of being uneconomical.

[Summary of the idea]

This idea was made in view of the above-mentioned drawbacks of the conventional ones, and provides an economical and highly efficient electromagnetic induction device that eliminates the above-mentioned disadvantages and satisfies the leakage impedance value between each winding. For the purpose of In addition to adjusting the leakage impedance between the winding and other windings to the required value, the tap leads provided on the inner winding are pulled out from the split part of the outermost winding, and the outermost winding is and the inner winding,
This can be an economical structure.

[Example of idea]

The invention will now be described with reference to the illustrated embodiments.

As shown in FIG. 3, in this invention, the outermost T-side winding 3 is arranged into upper and lower halves of the windings 3a and 3b, and a divided intermediate portion 5, which is the divided part of the T-side winding 3, is divided into upper and lower parts.
A tap lead 4 provided on the power supply winding 1 is drawn out from the power supply winding 1. In order to reduce the distance d ₁ between the windings 3a and 3b and the winding 1, and to obtain the condition of Z _S = Z _T , the arrangement interval dimension d ₃ of the upper and lower divided windings 3 a and 3 b can be adjusted. It is said that

With this configuration, compared to the distance d ₂ between the windings 1 and 3 in FIG. 2, the windings 3a and 3 shown in FIG.
3b and the winding ₁ can be significantly reduced. Furthermore, since there is almost no increase or decrease in the dimensions and weight of the transformer winding due to a change in the _distance d ₃ between the windings 3a and _3b in FIG.
Generated load loss can be reduced.

In addition, in Fig. 3, the leakage impedance Z _T can be adjusted by adjusting the distance d ₃ because the equivalent magnetic center arrangement of winding 1 and windings 3a and 3b changes as d ₃ increases or decreases. This is because the leakage impedance between the windings 1 and 3a, 3b changes accordingly.

In addition, in the above embodiment, three windings are explained, but in the present invention, the outermost layer winding is divided and arranged so that the dividing interval can be adjusted, and the outermost layer winding is provided with a winding inside the outermost layer winding. The tap lead is pulled out from the split part of the outermost layer winding to reduce the distance between the outermost layer winding and the inner winding, and the leakage impedance is adjusted by adjusting the split interval of the outermost layer winding. This method can also be applied to windings other than three windings.

[Effect of idea]

As described above, according to this invention, since the outermost layer winding is divided and arranged so that the dividing interval can be adjusted, the leakage impedance can be adjusted to a predetermined value by adjusting the dividing gap of the outermost layer winding. Also, since the tap leads provided on the inner windings of the outermost layer windings are pulled out from the dividing part of the outermost layer windings, the separation distance between the outermost layer windings and the inner windings can be reduced. , there is an effect that an economical electromagnetic induction device can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a leakage impedance equivalent circuit diagram of a three-winding transformer, Fig. 2 is an explanatory diagram of the winding arrangement of a conventional three-winding transformer, and Fig. 3 is a diagram of the windings of a three-winding transformer according to this invention. FIG. 2 is an explanatory diagram similar to FIG. 2 showing an example of the arrangement; 1...Power supply side winding, 2, 3, 3a, 3b...Load side winding, 4...Tap lead, 5...Split middle part, P, _P1 , _P2 ...Power supply side winding terminal lead,
S, S ₁ , S ₂ ... Load side winding terminal lead, T, T ₁ ,
T ₂ ... Load side winding terminal lead, Z _P ... Leakage impedance of power supply side winding, Z _S , Z _T ... Leakage impedance of load side winding, I〓 ₁ ... Load current flowing through power supply winding , I〓 ₂ ...S side load current, I〓 ₃ ...T side load current. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a winding of an electromagnetic induction device having a plurality of windings, the winding in the outermost layer is divided into upper and lower parts so that the division interval can be adjusted, and the winding inside the winding in the outermost layer is provided with a tapped lead. An electromagnetic induction device characterized in that the tap lead is pulled out from a divided portion of the winding in the outermost layer, and the dividing interval of the winding in the outermost layer is adjusted to adjust leakage impedance. winding.