Download 4_Inverters

Author: Ales Havel
E-mail: [email protected]
Phone number: 4149
Headquarters: E227
Web page: http://homen.vsb.cz/~hav278/
POWER SEMICONDUCTOR SYSTEMS I
Presentation contents

Main types of converters
 AC-DC
converters
 DC-DC converters
 DC-AC converters
 Voltage


Single phase inverters
Three phase inverters
 Current


inverters
inverters
Single phase inverters
Three phase inverters
 AC-AC
converters
Power converters

A power semiconductor converter is an electrical
device for converting electrical energy.
Single phase voltage inverters
Single phase voltage inverters
Single phase voltage inverters
Three phase voltage inverters
Three phase voltage inverters
Example
The three phase inverter is supplied from the DC-link voltage Ud = 540V. Calculate the
RMS value of the output phase and line voltages if the control angle Ψ = 180°.
Solution:
a) phase voltage
U RMS
2
 3

2
2
2

3
1 2
2  U 
 2U 
U  

U (t )dt 
  dt   
 dt     dt  
T
2  0  3 
  3 
2  3 


3
3
1 U 2  4U 2  U 2  
1
4
1
2
 
 
   U 2( 
 ) U
 254V

 9 3
9 3 9 3
27 27 27
3
b) line voltage:
U RMS 
1 2
2
U (t )dt 
T
2
c) conclusion:
2
3
2
 U dt 
0
U2

2
t 03
U
U line  3  U phase
2
 441V
3
Thank You for your attention