The 220V circuit is stabilized by Zener diode and current limiting resistor. How many resistors should be used?

Ridiculous! If you use diodes and resistors to stabilize the voltage successfully, the diodes must be cooled by a large fan and the resistors must be served by a fan.

Real voltage stabilization includes subsection voltage stabilization and stepless regulation voltage stabilization. Sectional voltage stabilization is a high-power special control transformer used internally. The voltage is stabilized by controlling the conduction or release of several relays connected to transformer windings through internal circuits. Its advantages are reliable operation and simple structure. But when the voltage is stable, the voltage fluctuates greatly.

There is also stepless adjustment. High-power semiconductor devices with special control transformers are used to adjust the output voltage. There is a reference circuit inside the voltage regulator. The control circuit controls the conduction degree of the power device by comparing with the reference circuit, and finally controls the output voltage. Its advantages are continuous adjustment and quick response.

Diodes and resistors are only used in places with low current and low power. Most of them are used in reference voltage circuits. Once the power is high, the diode will burn out quickly. As the power increases, the resistance will burn out quickly.

The lower limit voltage is 235V v V. If the power capacity of the commercial power is sufficient, the voltage will not be reduced too much if a 1.5KW on-hook air conditioner is connected. It will drop to 225V at most. A pressure drop of 10V is enough. Look carefully, it's 1.5KW air conditioner. You can imagine how difficult it would be to stabilize the voltage with diodes and resistors! This is only the lower limit of 235V V V. If it is the upper limit, the power requirements of diodes and resistors are even more terrible. Also, even if the voltage is reduced, the final result will be to pay more electricity bills. There is also the line aging faster. It is more prone to danger. Because the principle of diode voltage stabilization is to use short-circuit current to stabilize voltage. A drop in voltage will inevitably lead to an increase in current. The increase of current will lead to the increase of calorific value. The consequences can be imagined.

It is suggested that people who don't know how to pretend not to talk nonsense, otherwise it will lead to great disaster!

Even if the regulated electricity is 220V stable alternating current. But what is the AC current at this time? The minimum current limiting resistance is 575 ohms. Then, the maximum output current is 0.38A, minus the current consumed by the voltage regulator 100mA. When the final output load is short-circuited, the maximum output current is 0.28AA A. What can such a small current do? Still interesting? How strange! Such a small current can't even drive a small electric fan. Not to mention light bulbs, stereos or computers! It's all fucking bullshit

Also, will the load be in a short circuit state? Don't! Then, the resistance with greater resistance will consume a lot of energy. There is very little energy that can really be used on the load. I don't know what the landlord is doing to stabilize the voltage, but I know. Only some expensive appliances will use voltage stabilization. The power of electrical appliances to be stable will definitely not be small. So, what you said about diode and resistor voltage stabilization is a joke. It is safer and more practical to buy a voltage regulator directly.

Someone who has learned a little electronics. Don't think that ordering is awesome. Even if there is no plenary session, it will not hurt anyone! Return TM to P=I2R. Are you kidding? Did your teacher teach you this? Contact the actual situation, okay? Don't think that any circuit can be stabilized by a voltage regulator. Do you know where the voltage regulator is used? It's some small current circuits. Simple circuit. Now it's all 220V AC mains, and you have a TM voltage regulator. It's really China's sorrow. I'm not afraid of your attack. Find an electronics expert and see if you can. See if it's you or me. I'm really angry with you idiots!

I don't care about anything else. What matters to me is whether your idiot theories will harm people. When people develop products in the future, don't think about using voltage regulators to reduce pressure. I just didn't know there were such things as DC-DC switching circuits and linear transistor voltage stabilizing circuits. So sad!

I was the second to answer! And I saw these stupid answers. I get angry more and more. What I am afraid of is that Baidu will promote the wrong answer. Afraid of misleading new people.

Therefore, if there is a problem in the future, you should not only come to Baidu to understand it, but also think about it in light of the actual situation. Ask teachers or classmates, too.

What is the second floor doing? Still rectifying and filtering? Other voltage stabilizing circuits need AC voltage stabilization. Haven't you seen an AC regulator? I didn't know there was such a thing in the world, did I? He looks like a college student.

Landlord! That's all I have to say! Good or bad is your choice!