The heating of the electromagnetic coil of the patch inductor is due to the low resistance of the electromagnetic coil. With the working voltage of 220V, a large current will be generated, and the current will become hot. Try to increase the frequency of the working voltage, which will increase the frequency, increase the inductance and decrease the current.
The factors of "heating" caused by "saturation" of patch inductance are as follows
(1) If the circuit is too thin, the inductance and resistance of the patch will be too large, and when the effective value of the current is certain, the heating will be normal.
(2) The inductor of the patch is in saturation state, and this kind of heating is also very extensive.
(3) There are working voltages with large vibration on both sides of the chip inductor.
(4) The inductance of the patch is saturated, and this heat generation is also widespread. By enlarging the magnetic core, the number of turns of the coil can be reduced and the length of the wire can be reduced. Forward conversion, harmonic distortion current is small, magnetic loss is small, mainly resistance heat.
The solution of "heating" caused by "saturation" of the patch inductance is as follows
It is suggested to replace the magnetic core to reduce the number of turns and the length of wire. In the excitation conversion of the output power chip inductor manufacturer, the harmonic distortion current is small, and the magnetic loss is small, which is mainly due to resistance heat. Check the filter capacitor, and the capacitor is invalid, resulting in overheating and fading of the chip inductor.
Is the SMD inductor bead connected behind the rectifier tube? If a filter capacitor is developed at the front end of the inductor, please check whether it leads the way. At this time, the switching power supply has two identical inductors, one in the positive stage and the other in the negative stage (no damage). The controllable field tube in front of the inductor has no other capacitors. According to these two inductors connected in series with one positive and one negative, the electromagnetic coil is connected to the power supply, and the control plan of the front-end development water pipe is single pulse DC.
