la 1a Vao aLR g1D 10 20 L R L R ic L R 42c Figure 5.7 (a) Three-phase H-bridge c
ID: 2291720 • Letter: L
Question
la 1a Vao aLR g1D 10 20 L R L R ic L R 42c Figure 5.7 (a) Three-phase H-bridge configuration connected in a Y arrangement. (b) Three-phase H-bridge configuration connected in a ? arrangement. shows a solution in which the converters are arranged in a ? connection. There is also a possibility to connect a three-phase load in ? for the converters depicted in Fig. 5.7(a) and 5.7(b). Exercise 5.3 Pill a table to show the number of levels of the load phase voltage Dan for both topologies given in Fig. 5.7 as a function of the switching states.Explanation / Answer
A) Three phase H bridge with Star arrangement
The number of States is given by n=2S+1
S - number of Dc sources present
In star Configuration 3 Dc Sources are present
Hence number of states is given by n=2*3+1
n=7 states
The Switching state starts from -3vdc , -2vdc, -vdc ,0 ,vdc,2vdc,3vdc
B in delta configuration
number of states = 2s+1
n=7 states
in Delta configuration is mainly used for statcom applications,where negative sequence currents to be monitored
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