One, what is the working principle of the induction cooker
The working principle of the induction cooker is the use of magnetic field induction eddy current heating principle, through the internal circuit board control to generate alternating current, the use of high-frequency electric current, through the toroidal coil to produce a magnetic field, the pot will be placed in the magnetic field, when the magnetic field of magnetic lines of force through the magnetic conductivity (iron pot or stainless steel pan) at the bottom of the bottom, resulting in a myriad of small eddies, making the bottom of the pot rapidly heat up, and thus the bottom of the pot to heat up quickly. The bottom of the pot heats up quickly, thus heating the food.
Second, what are the common failures of the induction cooker
1, induction cooker on the power no reaction (not energized)
The cause of the induction cooker does not energize the reason mainly lies in the high-voltage main circuit, low-voltage power supply circuit and the single-chip microcomputer circuit of these circuit units.
2, induction cooker can not boot
Induction cooker can not boot, first of all, should be excluded from the grid voltage, ambient temperature and other factors of the use of the environment, and then focus on checking the pot temperature detection circuit, the IGBT temperature detection circuit, the grid voltage detection circuit, the key circuit of these types of protection circuits.
3, induction cooker can be turned on, there is an alarm signal, but does not heat
Induction cooker can be turned on, but does not heat, indicating that the oscillation control part of the induction cooker stops working for some reason, the point of failure lies mainly in the synchronization of oscillation circuits, surge protection circuits, MCU circuits, IGBT drive circuits, IGBT enable control circuits of the circuitry of these types.
4, induction cooker can be turned on, but intermittent heating
Induction cooker intermittent heating, indicating that the induction cooker in the process of work due to some factors do not meet the requirements and was forced to stop working, most of the circuits are still functioning normally, the failure point mainly lies in the synchronization of oscillation circuits, IGBT C-pole high-voltage protection circuits, PWM modulation circuits, IGBT drive, current detection circuits, microcontroller circuits, these types of circuits. circuit, microcontroller circuit, these types of circuits.
Summary: What is the working principle of the induction cooker, induction cooker common failures of knowledge, I will briefly introduce here, I hope to help you, for more information, please continue to pay attention to Qijia network.