First, the working principle of induction stove:
In fact, it is the principle of electromagnetic induction eddy current heating, which uses alternating current to generate alternating magnetic field with changing direction through the coil. Eddy current will appear inside the conductor in alternating magnetic field, which is caused by the eddy electric field driving the carrier movement in the conductor. The Joule heat effect of the vortex current heats up the conductor, so that the induction cooker can achieve the purpose of heating the food in the pot.
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Second, the maintenance of induction cooker
1. Explosion
Sometimes we give the induction cooker electricity, but there is no reaction, open the machine will see, insurance burned, then this is called explosion. If we encounter the explosion machine, we can measure all the large resistance and large type of cathode in the circuit, and if there is no problem, we will replace all the bad parts except IGBT. At this time, power on the test machine to test whether the B pole 0V of 5V, 15V or 18V, IGBT is normal. Only when these voltages are normal can IGBT be installed. That'll eliminate most of the blowups.
2, the whole machine has no reaction, but there is no explosion
Reproducing this situation is generally the induction cooker power conversion chip burned out, it generally produces 18V voltage, and then 7805 into 5V voltage for the CPU to work, without 5V, the CPU does not work, the whole machine does not work. Induction cooker such chips are generally used viper12a, viper22a, thx203h and so on. Test the periphery of the power conversion chip to see if there are any small devices associated with damage, if there is a replacement.
3. Fault code
If this happens, first of all to figure out the meaning of the code, basically can be found online, this kind of failure is generally those large resistance value of large body resistance change value, can be measured one by one, there is a change in the value of the replacement.
4. Dysfunctional
This fault is the easiest to repair, generally the key is broken, or the key board is too dirty leakage, replace the key or clean the key board can be.