Prepínanie napájanie modul DC sekanie
stručný úvod
Prepínanie napájanie dodávky môžem beť rozdelené na dve kategórie: AC/DC a DC/DC. DC/DC konvertory mať mať teraz dosiahnuť modularizácia, a dizajn technológia a výroba proces mať byť zrelé a štandardizované oboje domáce a medzinárodne, a mať been uznané by používatelia. a, the modularizácia of AC/DC, due to to its own charakteristiky, encounters more complex technical and manufacturing problems in the proces of modularizácia.
DC sekanie
DC/DC konverzia je the proces of konverzia a pevná DC napätie do a premenná DC napätie, tiež známe ako DC sekanie. There are two ways in in who choppers work: one is to keep the pulse width modulation mode Ts unchanged and change T (univerzálne), and other is to keep the frequency modulation mode T unchanged and change T (prone to interferencia). The specific circuits are divided in in the follow categories% 3a
(1) Buck obvod - a buck chopper s an priemer výstup napätie Uo menej than the vstup napätie Ui a the rovnaké polarity.
(2) Boost circuit - boost chopper, with an average output voltage Uo greater than the input voltage Ui and the same polarity.
(3) Buck Boost obvod - a buck alebo boost chopper s an priemer výstup napätie Uo väčší ako alebo menej ako vstup napätie Ui, opačný polarita, a induktívny prenos.
(4) Cuk obvod - a buck alebo boost chopper s an výstup priemer napätie Uo väčší than alebo menej a vstup napätie UI, opačný polarita, a kondenzátor prenos.
AC/DC conversion is the process of converting AC to DC, and the power flow direction can be bidirectional. The power flow from the power source to the load is called "rectification", and the power flow from the load to the power source is called "active inverter". The AC/DC converter input is 50/60Hz AC power. Due to the need for rectification and filtering, relatively large filter capacitors are essential. At the same time, due to safety standards (such as UL, CCEE, etc.) and limitations of EMC directives (such as IEC, FCC, CSA), EMC filtering and the use of components that meet safety standards must be added to the AC input side, which limits the miniaturization of the AC/DC power supply volume. Additionally, due to internal high-frequency, high-voltage The action of high current switches increases the difficulty of solving EMC electromagnetic compatibility problems, which puts forward high requirements for the design of internal high-density installation circuits. Due to the same reasons, high voltage and high current switches increase power consumption and limit the modularization process of AC/DC converters. Therefore, it is necessary to adopt power system optimization design methods to achieve a certain degree of satisfaction in its work efficiency.
AC/DC konverzia can be divided in half wave circuit and full wave circuit acharing to the wiring method of the circuit. Acrolling to the number of power phases, it can be divided into single phase, three-phase, and multiphase. Acharming to the working quadrant of the circuit, it can be divided into into one quadrant, two quadrants, three quadrants, three quadrants, and four quadrants.
výhoda
Jednoduchý dizajn. Vy len potreba jeden napájanie modul s a malý počet z diskrétny komponenty na získanie napájanie.
Skráťte the vývoj cyklus. Modulárny napájanie dodávky are všeobecne dostupné s viacnásobné vstup a výstup možnosti. Používatelia môže tiež opakovane zásobník alebo kríž zásobník na forma a modulárny kombinácia napájanie dodávka, dosiahnutie viacnásobné vstupy a výstupy, veľké redukcia prototyp vývoj čas.
Flexibilný zmeny. If the product design needs to be changed, simply convert or connect other convenientable power module in parallel.
Nízka technická požiadavky. Modulárna napájanie dodávky are všeobecne vybavená s štandardizovaná front-end, vysoko integrovaná výkon moduly, a iné komponenty, výroba napájanie dodávka dizajn jednoduchšie.
Vysoká kvalita a spoľahlivosť. Modulárny výkon spotrebný materiál are všeobecne úplne automatizovaný a vybavený s high-tech výrobou technológiou, výsledný in stabilný a spoľahlivý kvalitný.
Widely used: Modular power supplies can be widely used in various fields of social production and life, such as aviation and aerospace, locomotives and ships, military weapons, power generation and distribution, postal and telecommunications communication, metallurgy and mining, automatic control, household appliances, instruments and meters, and scientific research experiments, especially in highly reliable and high-tech fields, playing an irreplaceable important role.
