The working principle of transformer capacity tester includes two aspects. One is hysteresis loss. When the AC current passes through the transformer, the direction and size of the magnetic force line passing through the silicon steel sheet of the transformer will change accordingly, causing the molecules inside the silicon steel sheet to rub against each other and release heat energy, thus losing a part of electric energy, which is called hysteresis loss. The other is eddy current loss, when the transformer is working. When a magnetic line of force passes through the iron core, an induced current will be generated in the plane perpendicular to the magnetic line of force. Since this current forms a closed loop and circulates in a vortex shape, it is called eddy current. The existence of eddy current heats the iron core and consumes energy. This loss is called eddy current loss. The efficiency of the transformer is closely related to the power level of the transformer. Generally, the higher the power, the smaller the ratio of loss to output power, and the higher the efficiency. On the contrary, the lower the power, the lower the efficiency.
The working principle of the transformer capacity tester is that in the generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, the electric potential can be induced in the coil. In both cases, the value of the magnetic flux is unchanged, but the number of the magnetic flux of the cross chain with the coil changes, which is the principle of mutual inductance. Transformer is a device that uses electromagnetic mutual inductance to transform voltage, current and impedance.
