At present, more and more processing enterprises choose some efficient high-frequency induction heating equipment, which has automatic protection function, but they will also encounter various problems, such as equipment overcurrent. Then we will introduce the causes and Countermeasures of this phenomenon in detail.   
We conclude that there are three main reasons for equipment overcurrent:
1、 The shape and size of the self-made induction ring are incorrect, the distance between the workpiece and the induction ring is too small, and there is short circuit and ignition between the workpiece and the induction ring or the induction ring itself
Treatment method:
1. Remake the induction ring. The coupling gap between the induction ring and the heating part should be 1-3mm (the heating area is small). It should be 1-1.5mm thick φ More than 5 round copper tubes or square copper tubes are wound with induction coils.   
2. Solve the short circuit and ignition of induction coil.   
3. Change a larger protector switch on the premise that the heating system is normal.   
2、 Causes of startup overcurrent:
1. IGBT breakdown ＾ 2. Drive board fault 3. Fault caused by balancing small magnetic ring ＾ 4. Wet circuit board ＾ 5. Treatment method for abnormal power supply of drive board:
1. Replace the drive plate and IGBT, remove the small magnetic ring from the lead, check whether the water circuit and water box are blocked, blow the used plate with a blower and measure the voltage.   
2. Overcurrent after use for a period of time after startup: the reason is generally poor drive heat dissipation. Treatment method: reapply silicone grease; Check whether the waterway is blocked.
3、 Reasons for power increase overcurrent:
(1) Transformer ignition (2) sensor mismatch (3) drive board failure
Treatment method:
1. The inside of the machine and the induction ring must be cooled by water, and the water source must be clean to avoid blocking the cooling pipe and causing overheating damage to the machine. 2. When installing the induction ring, do not use waterproof raw material belt to avoid poor electrical connection
3. There are many reasons for the influence of the number of turns of the induction coil on the current, which will also cause overcurrent. First, it is related to the material of the workpiece; Secondly, if the coil is too large, the current will be small; Thirdly, the smaller the coil is, the more turns the coil is, the smaller the current will be
To sum up, the key to the current of high-frequency induction heating equipment lies in whether the high-frequency unit is coupled with the number of coil turns. If there is a fault, you can refer to the above information to find the cause, and ask professional equipment personnel to repair it if necessary.