Ingeniero

Using of IGBT in UPS

THE MERLIN GERIN KNOW- HOW

1.abstract

Author: Jean-Noël FIORINA

Contents
1. abstract.............................................................................................................................3 2. appropriate configurations for each range ....................................................4
nintroduction.........................................................................................................................4 n the main functions used in the UPS...............................................................................4 n the main configurations ....................................................................................................5

3. the semiconductors used in the various functions...................................6
n the thyristor.........................................................................................................................6 n the GTO (Gate Turn Off Thyristor) .................................................................................6 n the MOS transistor (Metal Oxyde Semiconductor)......................................................6 n the bipolartransistor.........................................................................................................6 n l'IGBT (Insulated Gate Bipolar Transistor)....................................................................6

4. bipolars / IGBT .............................................................................................................8
ncontrol..................................................................................................................................8 n the switching characteristics............................................................................................8 n reliability..............................................................................................................................9

5. a few details on the mainUPS functions ......................................................10
n the rectifier........................................................................................................................10 n specific element of a high performing UPS: the PWM inverter................................10 nregulation..........................................................................................................................11 n the step up converter......................................................................................................11

6. impact of inverter chopping frequency on UPS performance ............12
n the losses..........................................................................................................................12 n importanceof efficiency..................................................................................................13 n behaviour of UPS on non-linear loads .........................................................................13 n acoustic noise..................................................................................................................14 n example of a medium powerconfiguration (Comet)..................................................15 n example of a high power configuration (Galaxy) ........................................................15

7. development and technological watch at MGE UPS SYSTEMS .........16

8. conclusions ......................................................................................................................17

MGE UPSSYSTEMS

MGE0123UKI - 06/98

2

1.abstract

The UPS market is highly competitive. As a result, UPS performance and reliability requirements are steadily increasing and can only be satisfied if the components used keep pace. The present article provides a comparative analysis of the different semiconductors available for UPS components and their respective applications. Easy control,...