Normal household electricity consumption, electricity consumption within 3% is still normal. Under normal circumstances, the voltage with small power consumption is slightly larger than the power consumption under civil constant voltage (the knowledge of physics and electricity is not detailed). The greater the voltage, the smaller the power loss rate caused by resistance, which is a theoretical result. But in reality, there is another situation that needs to be considered, that is, there are also errors in the meter. Electricity is also needed for the operation of electric meters, and wool is not good for sheep. This cost will definitely be raised by consumers, so there will be no electricity in the house. After about a year's use, the power of the meter will be widened and turned a little (this was the case with the previous watch, but the electronic watch used now is much better). From this point of view, it must be a large electricity consumption base and a small power loss rate. The loss of transformer is divided into iron loss and copper loss: 1, and the copper loss of winding, P=I2Ri, is the effective value of current. The total copper loss of transformer is the algebraic sum of all windings. When the diameter of the conductor is less than twice the penetration depth, the skin effect can be directly calculated by DC resistance, otherwise AC resistance can be used. 2. Iron loss, which depends on frequency and magnetic induction intensity, circuit working state, materials, etc. For bipolar switch, P=Pb*Gb is the product of unit iron loss and mass, and unipolar switch is half of it. sport.sophiadivine.net/article/96532 1.html
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