Why does the commercial induction cooker heat very slowly after starting up?

Here are the reasons for the slow heating after the commercial induction cooker is started, as explained by Guangdong PXKITCHEN:

1. The decrease in resonant capacitance leads to the peak voltage of the pulse signal during the cutoff period of the power transistor being greater than the set value. This causes the power transistor overvoltage protection system circuit design staff to work frequently, resulting in a relatively shorter conduction time of the power transistor and requiring a longer cutoff time.

2. The 300V voltage can be lower than the normal value, and the power transistor does not generate a magnetic field in the conductive plate, gradually weakening the magnetic field intensity.

3. Changes in the components of the overvoltage protection circuit of the power transistor cause the overvoltage protection technology to operate prematurely.

4. Damage to the components of the oscillation circuit leads to an extension of the oscillation capacitor time, resulting in a decrease in the amplitude of the driving square wave in the new control circuit, shortening the switching time of the power transistor.

5. Abnormalities in the components of the current detection circuit result in a decrease in the sampling voltage applied to the CPU for current detection output. When the CPU detects a voltage lower than the normal value, it mistakenly assumes a lower set power, thereby narrowing the duty cycle of the PWM square wave pulses.

6. Abnormalities in the components of the PWM pulse modulation circuit result in a decrease in the control capability of the CPU output applied to the pulse width adjustment management circuit and relatively small differences in voltage ranges.

7. Abnormal 18V output voltage results in insufficient excitation of the power transistor, leading to a decrease in the output power of the induction cooker. In this case, it is easy to cause excessive power transistor loss and burnout.

These are the reasons for the slow heating after the commercial induction cooker is started. I hope this information is helpful. For more information on kitchen equipment, please visit the official website of Guangdong PXKITCHEN.