宿舍限制大功率电器的原理及破解方案的探究（The principle of dormitory limited high-power electric appliance and the exploration of the crack scheme）.docVIP

宿舍限制大功率电器的原理及破解方案的探究（The principle of dormitory limited high-power electric appliance and the exploration of the crack scheme） Some time ago, we also saw, dormitories are in constant power all day, and then, the school has quietly quietly in the bedroom on the roof to install some rather baffling things, so what is this thing? After my various investigations confirmed that this thing called: intelligent power limited identifier. Next, I will use the collected data to make a superficial inquiry into the principle and the solution of this gadget. Maybe everyone has recently felt, 6 computers in the dormitory work at the same time, all OK, but with a small hair dryer, meter trip. The power supply of the computer is 250W ~ 400W. The power of the 6 computers is definitely above an electric blower. But why can you bring 6 computers to work at the same time, but you cant get a 300W hair dryer? Whats the difference between the two? Heating device, we usually use the most is the water heater, hair dryer, their work principle is the current through the resistance wire, resistance wire heating to boil water. For 220V grid, which is equivalent to a pure resistance load to the grid, learned circuit students all know, 220V to the AC resistance, current waveform of the voltage waveform and the flow resistance at both ends are in phase, that is to say, the 0 is the two phase difference. We call this type of load is purely resistive load. What kind of load is the computer equivalent to? The power of a computer is, for the grid, a load on the grid. The power supply of the computer is the switching power supply (note, this is not the power supply of the switch). It belongs to the non-linear load (also known as the rectifier load). The principle of switching power supply is the first 220V/50hz alternating current rectifier for high voltage direct current, the high voltage DC inverter for high voltage high frequency AC, and then reduced to low voltage and high frequency AC through high