Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...

Control methods of PM Synchronous motor
β
Ψ
s
↓
M
e
↑
Ψ
s
↑
M
e
↑
Ψ
s
↓
Ψs
↑
Ψ s
γ
s γ
s
α
Ψ
s
↓
M
e
↓
Ψ
s
↑
M
e
↓
Figure. 4.12 Voltage vector effects in sector 1 on stator flux and torque.
The presented rule for first sector can be extended for other sectors, what further help
construct the switching Tables 4.1 and 4.2 as below [56]
Flux Torque sector 1 sector 2 sector 3 sector 4 sector 5 sector 6
d ψs =1
d me. =1 V
2
V
3
V
4
V
5
V
6
V
1
d me =0 V
6
V
1
V
2
V
3
V
4
V
5
d ψs =0
d me. =1 V
3
V
4
V
5
V
6
V
1
V
2
d me =0 V
5
V
6
V
1
V
2
V
3
V
4
Table 4.1. Switching table for DTC with active vectors.
Flux Torque sector 1 sector 2 sector 3 sector 4 sector 5 sector 6
d ψs =1
d me. =1 V
2
V
3
V
4
V
5
V
6
V
1
d me =0 V
7
V
0
V
7
V
0
V
7
V
0
d ψs =0
d me. =1 V
3
V
4
V
5
V
6
V
1
V
2
d me =0 V
0
V
7
V
0
V
7
V
0
V
7
Table 4.2. Switching table for DTC with zero and active vectors.
Tables 4.1 and 4.2 represent the eight and six voltage-vectors switching tables.
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