The fault phenomenon of the induction cooker can be roughly classified into the following types:

First, the induction cooker does not respond to power (no power)

The causes of such faults usually exist in the following circuit units: high voltage main circuit, low voltage power supply circuit and single chip circuit.

Second, the induction cooker can not be turned on

In the event of such failures, the disadvantages caused by the use of the environment, such as grid voltage, ambient temperature, etc., should be excluded first. When it is determined that there is a fault in the induction cooker, it is important to check the protection circuit. Pot temperature detection circuit, igbt temperature detection circuit, grid voltage detection circuit, button circuit.

Third, the induction cooker can be turned on, there is an alarm signal, but not heated

At the time of the test, the current of the whole machine is “zero” regardless of whether the pot is placed or not. When such a fault occurs, it indicates that the oscillation control part of the induction cooker has stopped working for some reason. The fault point generally exists in the synchronous oscillation circuit, the igbt drive circuit, the surge protection circuit, the igbt enable control circuit, and the single chip circuit.

Fourth, the induction cooker can be turned on, but there is intermittent heating

During the test, it can be observed that after the whole machine current increases from a small value to a certain value, it suddenly changes back to the “zero” value, and then the current of the whole machine increases again, and so on. When such a fault occurs, it can be judged that most of the circuits of the induction cooker can work normally, but only some condition factors in the working process do not meet the requirements and are forced to stop. Therefore, the following circuits should be checked: synchronous oscillator circuit, igbt driver, igbt c pole high voltage protection circuit, current detection circuit, pwm modulation circuit, and single chip circuit.

Standard Rugged USB 2.0

USB2.0 has USB A USB B
USB A has female housing plug-in pin SMT, female 90 degree plug-in, female 180 degree plug-in, male housing plug-in pin SMT, male 90 degree plug-in, male 180 degree wire bond.

USB B shell plug-in Pin SMT, female 90 degree plug-in, female 180 degree plug-in, male 180 degree shell plug-in,