High-frequency inverter electrical appliances are a kind of switching equipment used in the industrial field. What is the working principle of high-frequency inverters? This equipment is controlled by program logic. High frequency inverter can be used in the telecommunications industry and is a switching device in computer rooms. This kind of power supply can be used in the solar energy industry and power generation industry. It is a switching power supply device that uses data line output and is very safe. This article mainly introduces the working principle of high-frequency inverter and the difference between high-frequency inverter and low-frequency inverter. Follow the editor to learn more.

A high-frequency inverter is a DC to AC transformer. It is actually a voltage inversion process with a converter. The working principle of the high-frequency inverter is that the converter converts the AC voltage of the power grid into a stable 12V DC output, while the inverter converts the 12V DC voltage output by the Adapter into high-frequency, high-voltage AC power; both parts are equally The widely used pulse width modulation (PWM) technology is adopted. Its core part is a PWM integrated controller, the Adapter uses UC3842, and the inverter uses TL5001 chip. The operating voltage range of TL5001 is 3.6~40V. It is equipped with an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low-voltage protection circuit and a short-circuit protection circuit.

1. Input connection part: Phần đầu vào có 3 tín hiệu, 12V DC đầu vào VIN, làm việc cho phép điện áp ENB và tín hiệu điều khiển dòng điện bảng DIM. Số VIN được cung cấp bởi Adaptor, và điện áp ENB được cung cấp bởi MCU trên bo mạch chủ. Its value is 0 hoặc 3V. Khi ENB=0, biến tần không hoạt động, và khi ENB=3V, the inverter is in normal working condition and the DIM voltage is Provided by the mainboard, its variation range is between 0~5V. Different DIM values are fed back to the feedback terminal of the PWM controller. Dòng điện do biến tần cung cấp cho tải cũng sẽ khác nhau. Giá trị DIM càng nhỏ, the smaller the current output by the inverter. Càng lớn.

2. Voltage starting circuit: When ENB is at a high level, it outputs high voltage to light up the Panel's backlight tube.
3. Bộ điều khiển xung: Nó có các chức năng sau: điện áp tham chiếu bên trong, khuếch đại lỗi, bộ dao động và xung điều khiển, overvoltage protection, undervoltage protection, short circuit protection, and output transistor.

4. chuyển đổi DC: A voltage conversion circuit is composed of a MOS switching tube and an energy storage inductor. The input pulse is amplified by a push-pull amplifier and drives the MOS tube to perform switching actions, so that the DC voltage charges and discharges the inductor, so that the other end of the inductor can Get AC voltage.

5. Mạch dao động và đầu ra LC: ensure the 1600V voltage required to start the lamp, and reduce the voltage to 800V after the lamp is started.

6. Phản hồi điện áp đầu ra: Khi tải đang làm việc, the sampling voltage is fed back to stabilize the inverter voltage output.