The working principle of the inverter is to control the operation of the entire system through a control circuit. The inverter circuit completes the function of converting direct current to alternating current, and the filter circuit is used to filter out unwanted signals.

The work of the inverter circuit can also be refined as follows: first, the oscillating circuit converts direct current into alternating current; secondly, the coil boosts the irregular alternating current into square wave alternating current; finally, rectification makes the alternating current into a sine wave alternating current through a square wave.

The working principle of each part of the inverter

1. Input interface part: ان پٹ حصہ ہے 3 اشارے, 12V DC ان پٹ VIN, کام کرنے سے وولٹیج ENB اور پینل موجودہ کنٹرول سگنل DIM کو فعال کریں. ون اڈاپٹر کے ذریعہ فراہم کیا جاتا ہے, اور ENB وولٹیج MCU کے ذریعہ مدر بورڈ پر فراہم کی جاتی ہے, and its value is 0 یا 3V. جب ENB = 0, انورٹر کام نہیں کرتا ہے, اور جب ENB = 3V, the inverter is in normal working state; while the DIM voltage Provided by the main board, the range of variation is between 0-5V. Different DIM values ​​are fed back to the feedback terminal of the PWM controller. انورٹر کے ذریعہ بوجھ کو فراہم کردہ موجودہ بھی مختلف ہوگا. مدھم قدر چھوٹی ہے, the current output by the inverter. بڑا.

2. Voltage start circuit: When ENB is at high level, it outputs high voltage to light the panel's backlight tube.

3. پی ڈبلیو ایم کنٹرولر: اس میں مندرجہ ذیل افعال ہیں: اندرونی حوالہ وولٹیج, غلطی یمپلیفائر, آسکیلیٹر اور پی ڈبلیو ایم, اوور وولٹیج کا تحفظ, under-voltage protection, شارٹ سرکٹ تحفظ, output transistor.

4. ڈی سی تبادلوں: The voltage conversion circuit is composed of MOS switch tube and energy storage inductor. The input pulse is amplified by the push-pull amplifier and then drives the MOS tube to switch, so that the DC voltage can charge and discharge the inductor, so that the other end of the inductor can be Obtain AC voltage.

5. LC oscillation اور آؤٹ پٹ سرکٹ: to ensure the 1600V voltage required for the lamp to start, and to reduce the voltage to 800V after the lamp is started.

6. آؤٹ پٹ وولٹیج کی آراء: جب بوجھ کام کر رہا ہے, the sampled voltage is fed back to stabilize the voltage output of the inverter