Ring has a branch transformer iron core coil end with the same judgment
Ring has a branch transformer iron core coil end judgment, 2019 - the same name 03 - 30 15:05:09 what transformer core end with the same? Round to the conformity and the polarity of the induced electromotive force always consistent endpoint mouth is called the same name. Side effect: the same name in manufacturing transformers when mark around the back of each coil can use the change of current direction and current trend, you can easily put the mutual inductance electromotive force in the direction of the judgment. But this method is not complete, only applies to a few mutual inductance lines at the same time around the same sleeve and several coil around the ring no branch of the transformer core in both cases. If the system of transformer is to coil around a branch of the annular core, situation is more complicated. Because the coil to have obvious relativity. Now to & other; Day & throughout; Figure 1 type core, for example, A brief introduction is as follows: for the stud on the core around A, B, C three coil, A coil connected to current E, when press the switch, in the moment of turning on the power supply, because the current in A coil change from zero to A certain value, the change of current in A coil produces A change in magnetic flux, at the same time through the coil B and C respectively, Asymmetric branch) , according to the principle of electromagnetic induction of self inductance and mutual inductance, the coil A ( Self inductance) And B and C ( Mutual inductance) Of induction electromotive force can be generated by lenz's law: 1, 4, 6, polarity is positive, 2, 3, 5 polarity is negative, namely 1, 2, 3, 4, 6, or 5 for the same end. Figure the figure 2. The same transformer coil connected to current E B. When press the switch power supply, using the above method can also identify: 2, 3, 6, polarity is positive, 1, 4, 5 polarity is negative, namely, 2, 3, 1, 4, 5, 6, or for the same end. Figure 2 in figure 3 C, coil connected to the power supply. With the method to determine: 1, 3, 2, 4, 5 or 6 for the same end. Figure 3 by, because the electricity on the same transformer coil is different, the mutual inductance coil end of the same name also in change, not a fixed end and around to the same name. It must be to produce main transformer magnetic flux coil as a reference. Reference the coil is determined, all the coil can be defined according to round to the end of the same name. To determine the polarity of the induced electromotive force. All transformers are made clear the original, deputy winding, that is where the truth. Because only after the indicate the former vice winding, to determine the beginning and the end winding transformer. For the convenience of sure branches around the annular core coil on the side of the same name, the following simple method available: in a as an example. To produce the main magnetic flux of A coil winding for reference. B, C coil and A coil in the core of A closed surface for reference. A and B coil I closed surface as the reference plane, while A and C coil to package I, II, big sealing surface for reference. 1, 3, 5 end of each continue to around a circle. From their respective reference surface, so judge them around to agree for the same side, and 2, 4, 6, each lap, continue to go from their respective reference surface wear out. So for the same end. Graph one, three listed may, in accordance with law, and so on. Using this method determine the end of the same name and with lenz tianjin identified consistent. But it's much simpler.