3AFE61320946P0001 ABB Power module

Description

3AFE61320946P0001 ABB Power module

Generally, such modules are called load (POL) power supply systems or point-of-use power supply systems (PUPS). Because of the advantages of modular structure, the modular power supply is widely used in switching equipment, access equipment, mobile communication, microwave communication, optical transmission, router and other communication fields, automotive electronics, aerospace and so on.
Especially in recent years, due to the rapid development of data service and the continuous promotion of distributed power supply system, the increase of module power supply has exceeded the primary power supply. The module power supply has the function of isolation, strong anti-interference ability, its own protection function, easy to integrate. With the extensive use of semiconductor technology, packaging technology and high-frequency soft switch, the power density of module power supply is increasing, the conversion efficiency is increasing, and the application is becoming simpler.
Power module

In the field of switching power supply technology, people develop related power electronic devices while developing switching frequency conversion technology. The two promote each other and promote the switching power supply to the direction of light, small, thin, low noise, high reliability and anti-interference development with a growth rate of more than two digits every year. Switching power supply can be divided into AC/DC and DC/DC two categories, DC/DC converter has realized modularization, and the design technology and production process at home and abroad have been mature and standardized, and has been recognized by users, but the modularization of AC/DC, because of its own characteristics in the process of modularization, encounter more complex technology and process manufacturing problems. The structure and characteristics of the two types of switching power supply are described as follows

DC/DC conversion is the conversion of a variable DC voltage into a fixed DC voltage, also known as DC chopper. Chopper working mode has two, one is the pulse width modulation mode Ts unchanged, change ton(universal), the other is frequency modulation (
(1) Buck circuit – buck chopper, the output average voltage U0 is less than the input voltage Ui, the polarity is the same.
(2) Boost circuit — boost chopper, the output average voltage U0 is greater than the input voltage Ui, the polarity is the same.
(3) Buck-boost circuit — Buck or Boost chopper, whose output average voltage U0 is greater than or less than the input voltage Ui, polarity is opposite, inductive transmission.
(4) Cuk circuit – step-down or boost chopper, the output average voltage U0 is greater than or less than the input voltage Ui, the polarity is opposite, capacitor transmission. There are Sepic and Zeta circuits.
The above is the non-isolated DC-DC converter circuit. The isolated DC-DC converter includes forward circuit, flyback circuit, half-bridge circuit, full-bridge circuit and push-pull circuit.
Today’s soft switching technology has made a qualitative leap in DC/DC. A variety of ECI soft switching DC/DC converters designed and manufactured by VICOR Company in the United States have the maximum output power of 300W, 600W, 800W, etc. The corresponding power density is (6.2, 10, 17)W/cm3, and the efficiency is (80 ~ 90) %. The RM series, a high-frequency switching power module with soft switching technology, is newly launched by TDK-Lambda company in Japan. The switching frequency is (200 ~ 300)kHz, and the power density has reached 27W/cm3. The synchronous rectifier (MOSFET instead of Schottky diode) is adopted, which improves the efficiency of the whole circuit to 90%.

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3AFE61320946P0001

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