Rabu, 27 Agustus 2014

Roll ELECTRIC MOTORS 3 PHASE

PART I. -Sections 3 PHASE MOTOR
Motor 3 phase basically consists of a stator is the stationary (static) and the rotor is the moving / rotating (rotation).
II. EQUIPMENT AND MATERIALS
The equipment should be provided as a reference in wrapped around the stator is as follows:
A. Equipment:
Wrenches 1 / ring
2 Screwdriver
3. Tracker
4. Hammer
5. AVO meters
6. Megger / insulation tester
7 Solder
8. Tacho meter
9. Wire brush

A. Materials:
1 Wire email
2 Paper prispan / insulation paper
3 Lak / laquer insulation
4 sleeves (slove)
5. Paper rub
6 Cable NYAF
7 Lubricants / grace
8 Brush
9 Tin / tinnol
III. THEORY OF SUPPORTING
A. The form of the coil:
1. centered / concentric / spiral winding
2 snare / gusset / lap winding
3 Waves

A. Formulas
The ends of the coil are marked with the letters U, V, W, X, Y, and Z when the base is marked U, the ends of X, Y and the base of the base of the tip V W ends Z.
Terms slot number, the calculation of the number of slots should be divided by 4 and 3


C. EXAMPLE CALCULATION
1 3-phase motors have a stator grooves (g) 12 grooves, number of poles (2p) = 4, a single layer.
completion:
Ys = G / 2p = 12/4 = 3
So that the tip of the wire in the groove enter the number 1, then the other end of the groove number 4.
Q = G / 2 p.m = 12 / 4.3 = 1
Mean number of coils of each group is 1.
K = G / 2p = 12/4 = 3
Each pole consists of 3 coils
KAR = 360 / G = 360/12 = 30 radians
The distance between the grooves 30 radians
KAL = KAR .P = 30. 2 = 60 electrical
Kp = 120 / KAL = 120/60 = 2
If the first phase at the start of phase 1 then the second groove from the groove to 3
A list of windings: sigle layer in the groove means there is only one coil.
U | 1-4 7-10 I I I X
V I I I 9-12 I 3-6 Y
W 11-2 I 5-8 I I I z
Figure stretch:



2.Double layer, just as a matter of winding number 1 but used is a double layer winding
U I I I 1-4 7-4 7-10 I I I I I 1-10 X
V I I I 3-6 9-6 9-12 I I I I I 3-12 Y
W 11-8 I 5-8 I I I I I I 11-2 5-2 I z



3. Planning 3-phase motors with plot number 24 and 36
Poles made ​​4 pieces with a single-layer winding.
completion:
A. For a stator with 24 grooves
Ys = G / 2p = 24/4 = 6
Step entanglement is 1 -7
Q = G / 2 p.m = 24 / 4.3 = 2
Mean number of coils per group 2.
K = G / 2p = 24/4 = 6
Each pole consists of 6 coils
KAR = 360 / G = 360/24 = 15 radians
The distance between the grooves 15 radians
KAL = KAR .P = 15. 2 = 30 electrical
Kp = 120 / KAL = 120/30 = 4
If the first phase at the start of the second phase, the first groove of the groove to 5
A list belitannya as follows.
1-7 U I I I I X 13-19
2-8 I I I I 14-20
5-11 V I I I I Y 17-23
6-12 I I I I 18-24
W 9-15 I I I I z 21-3
I 10-16I I 22-4 I
Figure stretch:




completion:
B. For a stator with 36 grooves
Ys = G / 2p = 36/4 = 9
Step entanglement is 1 -10
Q = G / 2 p.m = 36 / 4.3 = 3
Mean number of coils per group is 3.
K = G / 2p = 36/4 = 9
Each pole consists of 6 coils
KAR = 360 / G = 360/36 = 10 radians
The distance between the grooves 15 radians
KAL = KAR .P = 10. 2 = 20 electrical
Kp = 120 / KAL = 120/20 = 6
If the first phase at the start of phase 1 then the second groove from the groove to 7
A list entanglement as follows.
1-10 U I I I I X 19-28
2-11 I I I I 20-29
3-12 I I I I 21-30
7-16 V I I I I Y 25-34
8-17 I I I I 26-35
9-18 I I I I 27-36
W I 13-22I I 31-4 I z
I 14-23I I 32-5 I
I 15-24I I 33-6 I
Figure stretch:


Motor with double speed
Motor with double speed or two-speed can be constructed in two ways, the first is that there are two motor windings, for example, the entanglement with the speed of 3000 rpm, and at the same stator windings wrapped around the second with a speed of 1000 rpm, it is obvious that the skills that have been obtained already covers, while the second way is winding Dahlander.
This type of entanglement is not using the formula - the formula for entanglement connection only develop the system, the following is an example - Dahlander windings example:
a. for motors with 24 grooves

b. for motors with 36 grooves

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