How to deal with the overcurrent of 高頻感應加熱設備?

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.

方法：

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. IGBT擊穿

2.驅動板故障

3.由平衡小磁環引起

4.電路板潮濕

5、驅動板供電異常

6、傳感器短路

方法：

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、開機使用一段時間後過流：原因一般是驅動器散熱不好。 處理方法：重新塗抹矽脂； 檢查水路是否堵塞。

Three, power increase over current

1. Transformer ignition

2. The sensor does not match

3.驅動板故障

方法：

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.