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: ආදාන කොටස ඇත 3 සංඥා, 12V DC ආදානය VIN, වැඩ සක්රීය වෝල්ටීයතා ENB සහ පැනල් වත්මන් පාලන සංඥා DIM. VIN සපයනු ලබන්නේ ඇඩැප්ටරය මගිනි, සහ ENB වෝල්ටීයතාව මවු පුවරුවේ MCU මගින් සපයනු ලැබේ, and its value is 0 හෝ 3V. ENB=0 විට, ඉන්වර්ටරය ක්රියා නොකරයි, සහ ENB=3V විට, 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. භාරයට ඉන්වර්ටරය සපයන ධාරාව ද වෙනස් වේ. DIM අගය කුඩා වේ, the current output by the inverter. විශාලයි.

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

3. PWM පාලකය: එය පහත සඳහන් කාර්යයන් ඇත: අභ්යන්තර යොමු වෝල්ටීයතාවය, දෝෂ ඇම්ප්ලිෆයර්, දෝලනය සහ PWM, over-voltage protection, under-voltage protection, short-circuit protection, output transistor.

4. DC පරිවර්තනය: 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 දෝලනය සහ ප්රතිදාන පරිපථය: to ensure the 1600V voltage required for the lamp to start, and to reduce the voltage to 800V after the lamp is started.

6. ප්රතිදාන වෝල්ටීයතා ප්රතිපෝෂණ: බර වැඩ කරන විට, the sampled voltage is fed back to stabilize the voltage output of the inverter