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Electromagnetic conversion Rotating field machines Synchronous machine Asynchronous machine MCQs

Question 3: answer

Plan of the laboratory

Introduction

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

When we have the information on

  • the actual sector where the phasor of the stator flux is (1...6),
  • the required evolution of the modulus of the stator flux (RF = 1 / -1) and
  • the required evolution of the developed electromagnetic toque (Rt = 1 / 0 / -1),

a commutation table is synthesised. Based on it, the necessary voltage phasor is determined and consequently, the next topology of the inverter (1 = KA,B,C : ON, 0 = KA,B,C : OFF):

RF
Rt
Sector
1
2
3
4
5
6
               
1
1
2
3
4
5
6
1
(110)
(010)
(011)
(001)
(101)
(100)
               
1
0
7
0
7
0
7
0
(111)
(000)
(111)
(000)
(111)
(000)
               
1
-1
6
1
2
3
4
5
(101)
(100)
(110)
(010)
(011)
(001)
               
-1
1
3
4
5
6
1
2
(010)
(011)
(001)
(101)
(100)
(110)
               
-1
0
0
7
0
7
0
7
(000)
(111)
(000)
(111)
(000)
(111)
               
-1
-1
5
6
1
2
3
4
(001)
(101)
(100)
(110)
(010)
(011)

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Last update: 2005, September, 30 | Translation: Sergiu Ivanov | Realization: Florin Ravigan, Cristian Vladu