The basic working principle of power transformer accessories

The principle of pole mounted transformer accessories: When a sinusoidal communication voltage U1 added to the primary coil at both ends, the conductor in the alternating current I1 and the occurrence of alternating magnetic flux ф1, which along the core through the primary and secondary coil form closed Magnetic circuit. In the secondary coil inductive mutual induction potential U2, together ф1 will also be induced in the primary coil of a self-inductance potential E1, E1 and the direction of the voltage U1 opposite the direction of the ups and downs, and then bound the size of I1. In order to adhere to the existence of flux ф1 need to have a certain power consumption, and the 37.5kva transformer itself has some loss, although at the moment no secondary load, the primary coil is still a certain current, the current we call "no-load current" . If secondary load connected to the secondary coil current I2 occurs, and therefore magnetic flux ф2, ф2 and ф1 opposite direction, played a mutual canceling effect, so that the total core magnetic flux has been reduced, and then make The primary self-inductance voltage E1 cut, the results of the I1 increases, showing the primary current and secondary load are closely related. When the secondary load current increases when I1, ф1 also added, and ф1 added some happened to be offset by ф2 that some magnetic flux, to maintain the core of the total magnetic flux unchanged. If you do not consider the loss of the transformer, can be considered an ideal secondary transformer power consumption is the primary power from the power to obtain power. Transformer can be modified according to the need to change the number of secondary coil winding number of secondary voltage, but can not change the power consumption to allow the load.