Beautiful electromagnetic oven TM-S1-01 main board, Kang copper wire current detection function?
When the VR1 is increased, the voltage corresponding to the current is increased. In the case of certain input current, the output voltage increased accordingly, then the AD value of current detection will be increased, according to the requirements of the software constant power, power will decline relatively. Fault phenomenon: when the emergence of constantan wire is open, because IGBT 300V voltage does not work, not when the electromagnetic oven heating; Kang copper weld may malfunction appeared slow heating or intermittent heating.
After checking the pot, it will take 1 seconds to detect the change of the current, and determine the material, size and size of the cooker through the difference of the current
At work, the microcontroller detects the current changes at any time, according to the detected voltage and current signals, automatically adjust the PWM to do constant power processing.
At work, the microcontroller detects the current changes at any time, when the current changes too large to do without pot judgment. VR1 is a 0 ohm to 500 ohm adjustable resistance, mainly to adjust the power structure because the error caused by the deviation through the resistor adjustment by adjusting the resistance to change the current detection benchmark, to adjust the size of the output power of the electromagnetic oven to.
