Power adapters are ubiquitous in our daily lives, especially in computer configurations. Do you understand the advantages and classifications of power adapters? Let's follow the manufacturer to learn more!

Advantages of Power Adapters

Power adapter is a static frequency conversion power supply composed of power semiconductor components. It is a static frequency conversion technology that converts the power frequency (50Hz) to the intermediate frequency (400Hz~200kHz) through thyristors. It has two frequency conversion methods: AC-DC-AC frequency conversion and AC-AC frequency conversion. Compared with traditional power generation units, it has the advantages of flexible control mode, high output power, high efficiency, convenient operation frequency variation, low noise, small size, light weight, easy installation, and easy operation and maintenance. It has been widely used in industries such as building materials, metallurgy, national defense, railways, and petroleum. The power adapter is efficient and variable frequency. The main technologies and advantages adopted by modern power adapters are as follows.

(1) The starting method of modern power adapters adopts a sweep frequency zero voltage soft starting method of self excitation to self excitation. Throughout the entire starting process, the frequency regulation system and the current and voltage regulation closed-loop system constantly track the changes in the load, achieving ideal soft starting. This starting method has a small impact on the thyristor, which is conducive to extending the service life of the thyristor. At the same time, it has the advantage of easy starting for both light and heavy loads, especially when the steelmaking furnace is full or cold. It can be easily started.

(2) The control circuit of modern power adapters adopts a microprocessor constant power control circuit and is equipped with an inverter angle automatic adjustment circuit. During operation, it automatically monitors the changes in voltage, current, and frequency at any time, and judges the changes in load based on this. It automatically adjusts the matching of load impedance and constant power output, thereby achieving the purpose of time saving, power saving, and improving power factor. This significantly saves energy and reduces power grid pollution.

(3) The control circuit of modern power adapters is designed using CPLD software, and its program input is completed by a computer. It has high pulse accuracy, anti-interference ability, fast response speed, and convenient debugging. It has multiple protection functions such as current cutoff, voltage cutoff, overcurrent, overvoltage, undervoltage, and shortage. As each circuit component always works within a safe range, the service life of the power adapter is greatly improved.

(4) Modern power adapters can automatically determine the phase sequence of three-phase incoming lines without the need to distinguish phase sequences A, B, and C, making debugging extremely convenient.

(5) The circuit boards of modern power adapters are all made using peak automatic soldering, without any virtual soldering phenomenon. All kinds of adjustment systems use contactless electronic adjustment, with no fault points, extremely low failure rate, and extremely convenient operation.

Classification of power adapters

Power adapters can be divided into current type and voltage type according to the different filters used. The current type adopts a DC smoothing reactor filter, which can obtain a relatively straight DC current. The load current is a rectangular wave, and the load voltage is approximately a sine wave; The voltage type adopts capacitor filtering, which can obtain a relatively flat DC voltage. The voltage at both ends of the load is a rectangular wave, and the load power supply is approximately a sine wave.

Power adapters can be divided into three types based on load resonance: parallel resonance, series resonance, and series parallel resonance. Current type is commonly used in parallel and series parallel resonant inverter circuits; Voltage type is mostly used in series resonant inverter circuits.