About electrical appliances. The problem of the heating wire 6V 12V transformer please everyone, I h

There are the following options.

1.First, confirm the normal working current of the original heating wire, and then determine the secondary current of the transformer. In the secondary connection a high-power variable resistor is connected in series with the heating wire.

It is recommended that the heating wire be longer, which is conducive to reducing the power and resistance value of the variable resistor. The secondary voltage is as low as possible. All calculations conform to Ohm's law.

2.A simpler way is to choose an AC voltage regulator with a current greater than the heating wire, and the voltage can be slowly adjusted up from "0". It can also be adjusted by an electronic speed switch of equal current (note: string a resistor or an isocurrent bulb to prevent a short circuit in the power supply).

Very simple! Get a computer power supply! Or a 12V2A power supply, just connect the heating wire! I made one that I'm using to cut foam boards right now!

The first thing to look at is the power (wattage) of your transformer, if it is a 50W transformer, you can connect a 50W 1-2, resistor in series.

It takes a big transformer to do it, I really don't know how much power can make the resistance wire red, now let's say you need 30W, voltage 12V, then the current you need is, can your power supply stand up? You may have to ask, how do you do the 30W electric soldering iron, because the electric soldering iron is connected to 220V, the load capacity of people is invincible, and to reach 30W power, as long as it is OK, it is more difficult for you to do this kind of design on low voltage.

Summary. Let's say that a device and a charger are compatible with each other and both support both 9V and 12V modes. The latter group of high-voltage ones is more adaptable to the charging cable.

5 ohm heating wire, what is the difference between using 9V voltage and 12V voltage.

Your question has been received, it will take a little time to type, please wait a while, please don't end the consultation, you can also provide more effective information, so that I can answer for you more coarsely and dry.

Suppose a device and charger are compatible with each other, and both support 9V and 12V modes. The latter set of high-voltage covers of the charging cable are better than the ability to carry the appropriate objects.

What is the difference between using 9V and 12V for 5 ohm heating wires?

There is no difference. The device is automatically compatible with one or the other.

If it is 12V, it will have a lot of power and will heat up.

The setting is 12V voltage 5 ohm heating wire, change to 9V voltage, what is the situation?

It works, but the power will be halved.

12V can band 9V

Oh, that heat has also decreased, right, thank you.

But 9v with 12v will be overloaded.

Right. My power supply, it's okay.

If you change 9V to 12V, the life will be consumed quickly.

Ok thanks.

No thanks!

1. The power of the transformer is too small, only 36V, only 15VA, how can it make the 500W heating wire red? It's like using a dry cell battery to make an energy-saving lamp shine, it's impossible.

2. The heating wire can not only look at the power, but also the heating wire is 220V 500W, or 36V 500W, if it is a 220W 500W heating wire, you want to be red when connected to the 36V voltage?

Route: 1. If the heating wire is 220V, it is directly connected to the 220V mains.

2. If the heating wire is 36V, change to a 500VA 36V transformer. It is impossible to redness with 15VA.

3. If the heating wire is 220V, the power is 500W, and the current is. And you, this transformer can only output less current, want to red? If you can't do it, you can use a transformer above 36V 80VA, and then reduce the length of the heating wire to the original 1 6, and use this length of 1 6 (don't do anything else) to connect it to the 36V 80VA transformer to make it red.

4. Use your original transformer to continuously reduce the length of the heating wire until it can be red, but it should be noted that the transformer will be seriously overloaded at this time, and it will burn out after a few minutes and dozens of minutes.

Big brother, is the working voltage of your heating wire 36V? Generally speaking, the resistance wire is directly connected to 220V electricity, and there is no need for a transformer.

This problem is too simple, the capacity of your transformer is 15VA, you want to make the heating wire reach the specified temperature can only choose 36V heating wire, the power of the heating wire must be less than or equal to 15W!

1. Whether the resistance wire works "red" is not only related to its own resistance value and working voltage, but also related to its own power dissipation. For example, if the rated working current of 1000W 220V electric furnace wire is 1000 220=, and a section of the electric furnace wire is intercepted from the electric furnace wire and let it work below, the degree of "redness" should be the same as that of the whole section of electric furnace wire when working at 220V; If it is taken from a more powerful electric furnace wire, it may not necessarily be "red" when the power is higher.

2. The current can be output by a 12V5A transformer (leaving a certain amount of power), and the resistance value should be about 55W.

The resistance of the electric furnace wire of W 220V may be slightly lower when it is cold), and it can be cut off 5 6% of its length, and attention should be paid to the length of the winding at the joint.

4. If you need more power, you can consider using a 24V100VA transformer, the output current is best controlled as follows, and the resistance calculation method is the same as above.