IP68 PC Material Outdoor Vertical Enclosure AC Adapter

Advantages and classification of power adapters

Advantages of the power adapter

Power adapter is a static frequency conversion power supply composed of power semiconductor components. It is a static frequency conversion technology that transforms power frequency (50Hz) into medium frequency (400Hz ~ 200kHz) through the thyristor. It has two types of frequency conversion: AC - DC - AC frequency conversion and AC - AC frequency conversion. Compared with the traditional power generator set, it has the advantages of flexible control mode, large output power, high efficiency, convenient change of operation frequency, low noise, small volume, light weight, simple installation, easy operation and maintenance, and has been widely used in building materials, metallurgy, national defense, railway, petroleum and other industries. The power adapter has high efficiency and frequency conversion. The main technologies and advantages of modern power adapters are as follows.

(1) USES modern the activation method for power adapter he turned in the form of self-excited sweep frequency type zero pressure soft start way, in the entire launch process, frequency adjustment system and the current, voltage adjustment time closed-loop system to track the change of the load, achieve the soft start, this way of starting a small impact on thyristor, and is beneficial to extend the service life of thyristor, At the same time, it has the advantage of easy to start under both light and heavy loads, especially when the steel furnace is full and cold.

(2) of the modern power adapter of constant power control circuit, control circuit with microprocessor with inverter Ф Angle automatic control circuit, in the process of operation, automatically at any time to monitor the change of voltage, current, frequency, and thus determine the change of load, automatic adjust the load impedance matching, constant power output, so as to achieve quarter, power saving, the purpose of raising power factor, Energy saving is obvious and power grid pollution is small.

(3) of modern control circuit adopts CPLD software design of the power adapter, its program input by the computer to complete the pulse of high precision, anti-jamming, fast response, convenient debugging, river closure, cutting pressure, over-current, over-voltage, under-voltage, lack of equal protection function, because each circuit components are always work within the scope of the security, Thus, the service life of the power adapter is greatly extended.

(4) Modern power adapter can automatically judge the phase sequence of three-phase incoming line, without the need to distinguish A, B, C phase sequence, debugging is very convenient.

(5) the circuit board of modern power adapter is all made of wave peak automatic welding, no virtual welding phenomenon, all kinds of regulating system adopts non-contact electronic adjustment, no point of failure, the failure rate is very low, the operation is very convenient.

Classification of power adapters

The power adapter can be divided into current type and voltage type according to the different filters used. The current type is filtered by dc flat wave reactor, which can obtain relatively straight DC current. The load current is rectangular wave, and the load voltage is approximately sine wave. The voltage type adopts capacitor filtering, which can obtain relatively straight DC voltage. The voltage at both ends of the load is rectangular wave, and the load power supply is approximately sine wave.

According to the load resonance mode, the power adapter can be divided into parallel resonance, series resonance and series parallel resonance. Current type is often used in parallel and series parallel resonant inverter circuit; Voltage type is mostly used in series resonant inverter circuit.