How to deal with the overcurrent of високофреквентна опрема за индукционо грејање?

The reasons for the overcurrent of high-frequency heating equipment are:

1. The self-made induction coil has incorrect shape and size, the distance between the workpiece and the induction coil is too small, there is a short circuit between the workpiece and the induction coil or the induction coil itself, and the prepared induction coil is affected by the customer’s metal fixture during use or The influence of nearby metal objects, etc.

Приступ:

1. Re-make the induction coil. The coupling gap between the induction coil and the heating part should be 1-3mm (when the heating area is small), and the induction coil should be wound with a round copper tube or square copper tube with a thickness of 1-1.5mm and above φ5;

2. Check whether the heating power matches the protector. If the match is correct, check whether the operation is correct, mainly the heating time;

3. When materials with poor magnetic permeability such as copper and aluminum are inductively heated, the number of induction coils should be increased;

4. The equipment should avoid sunlight, rain, humidity, etc.;

5. Change to a larger protector switch, provided that the heating system is normal.

Two, start-up overcurrent

1. ИГБТ квар

2. Квар управљачке плоче

3. Узроковано балансирањем малих магнетних прстенова

4. Плоча је мокра

5. Напајање погонске плоче је ненормално

6. Кратки спој сензора

Приступ:

1. Replace the driver board and IGBT, remove the small magnetic ring from the lead, check the waterway, whether the water box is blocked, blow the board used with a hair dryer, and measure the voltage;

2. Прекомерна струја након коришћења у одређеном временском периоду након покретања: разлог је генерално слабо расипање топлоте драјвера. Метода лечења: поново нанети силиконску маст; проверити да ли је пловни пут блокиран.

Three, power increase over current

1. Transformer ignition

2. The sensor does not match

3. Квар управљачке плоче

Приступ:

1. The inside of the machine and the induction coil must be cooled by water, and the water source must be clean, so as not to block the cooling pipe and cause the machine to overheat and damage. The temperature of the cooling water should not be too high, it should be lower than 45℃;

2. Do not use waterproof raw material tape when installing the induction coil to avoid bad electrical connection. Do not change the induction coil soldering to brazing or silver welding;

3. There are many reasons for the influence of the number of turns of the induction coil on the current, and it can also cause overcurrent.