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 پٽ حصو آهي 3 سگنل, 12V DC ان پٽ VIN, ڪم ڪندڙ وولٹیج ENB ۽ پينل موجوده ڪنٽرول سگنل DIM کي چالو ڪري ٿو. VIN اڊاپٽر طرفان مهيا ڪيل آهي, ۽ ENB وولٹیج MCU پاران مدر بورڊ تي مهيا ڪئي وئي آهي, and its value is 0 يا 3V. جڏهن ENB = 0, inverter ڪم نه ڪندو آھي, ۽ جڏهن 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. لوڊ ڪرڻ لاء inverter پاران مهيا ڪيل موجوده به مختلف ٿي ويندي. ننڍو DIM قدر, the current output by the inverter. وڏو.

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

3. PWM ڪنٽرولر: ان ۾ هيٺيان ڪم آهن: اندروني حوالو وولٹیج, غلطي amplifier, oscillator ۽ PWM, over-voltage protection, under-voltage protection, short-circuit protection, output transistor.

4. ڊي سي جي تبديلي: 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 ۽ ٻاڦ سرڪٽ: to ensure the 1600V voltage required for the lamp to start, and to reduce the voltage to 800V after the lamp is started.

6. آئوٽ وولٹیج موٽ: جڏهن لوڊ ڪم ڪري رهيو آهي, the sampled voltage is fed back to stabilize the voltage output of the inverter