180degree conduction mode of 3 phase inverter
Post on 13-Jul-2015
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1800 conduction mode of 3 phase inverter
Manikandan.S M.Tech Power System
180° Conduction
• Three transistors ON at a time
Summary Table
Waveforms for 180° Conduction
Phase Voltages for 180° Conduction
Waveforms for 180° Conduction
Summary Table
Mode 1 Operation
Mode 1 Operation
1
1
1
3
2 22
3
2 32
3
eq
s s
eq
san cn
sbn
R RR R
V Vi
R R
Vi Rv v
Vv i R
= + =
= =
= = =
−= − =
03
tπω≤ ≤
Q1, Q5, Q6 conduct
Summary Table
Mode 2 Operation
Mode 2 Operation
2
2
2
3
2 22
3
2
3
2 3
eq
s s
eq
san
sbn cn
R RR R
V Vi
R R
Vv i R
Vi Rv v
= + =
= =
= =
−−= = =
2
3 3t
π πω≤ ≤
Q1, Q2, Q6 conduct
Summary Table
Mode 3 Operation
Mode 3 Operation
2
3t
π ω π≤ ≤
3
3
3
3
2 22
3
22
3
eq
s s
eq
an bn
scn
R RR R
V Vi
R R
iv v
Vv i R
= + =
= =
= =
−= =Q1, Q2, Q3 conduct
Phase Voltages for 180° Conduction
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