ROTOR AND STATOR FAILUR ANALYSIS FOR 2022 YEAR SUPPLIER : ELCEN MACHINES PVT LTD

1. TECO ELECTRICAL INDUSTRIES PRIVATE LIMITED
Registered Office& Works:
Block No. 277, RS No. 166, Village Raika, Old NH-8,
Vadodara – 391340. E-mail: ramesh@teco.co.in
CIN: U31900GJ2016FTC092378
PREPARED BY : HARSH B JOSHI QUALITY ASSUURANCE AND CONTROL DEPARTMENT, TEIP (VADODARA) 1
 Defects of stator assembly and rotor assembly are divided separately are as below:
 ROTOR ASSEMBLY DEFECTS ANALYSIS
ROTOR
ASSEMBLY
Defects QTY
NDE groove missing 85
B2B Distance variations 79
Bearing seat Oversized 30
Shaft Extension Oversized 25
Bearing seat undersized 20
Rotor OD Oversized 15
Rotor OD undersized 6
Shaft Extension undersized 4
Wrong shaft pressing 3
Runout 2
Key way dimensions variations 2
Shaft loose in rotor 2
Missing operations 1
Pressed Length variations 1
Fig.1 Defects Proportions: ROTOR Assembly defects, Elcen
31%
29%
11%
9%
7% 5%
2% 6%
ROTOR ASSEMBLY DEFECTS
NDE groove missing
B2B Distance variations
Bearing seat Oversized
Shaft Extension Oversized
Bearing seat undersized
Rotor OD Oversized
Rotor OD undersized
Shaft Extension undersized
Wrong shaft pressing
Runout
Key way dimensions variations
Shaft loose in rotor
Missing operations
Pressed Length variations
Supplier’s Name: ELCEN Machines Pvt. Ltd
NC Analysis duration JAN 2022 to JAN 2023

2. TECO ELECTRICAL INDUSTRIES PRIVATE LIMITED
Registered Office& Works:
Block No. 277, RS No. 166, Village Raika, Old NH-8,
Vadodara – 391340. E-mail: ramesh@teco.co.in
CIN: U31900GJ2016FTC092378
PREPARED BY : HARSH B JOSHI QUALITY ASSUURANCE AND CONTROL DEPARTMENT, TEIP (VADODARA) 2
 Pareto analysis for Rotor assembly defects:
Sr No Defects Frequency cumm cumm %
1 NDE groove missing 85 85 30.91
2 B2B Distance variations 79 164 59.64
3 Bearing seat Oversized 30 194 70.55
4 Shaft Extension Oversized 25 219 79.64
5 Bearing seat undersized 20 239 86.91
6 Rotor OD Oversized 15 254 92.36
7 Rotor OD undersized 6 260 94.55
8 Shaft Extension undersized 4 264 96.00
9 Wrong shaft pressing 3 267 97.09
10 Runout 2 269 97.82
11 Key way dimensions variations 2 271 98.55
12 Shaft loose in rotor 2 273 99.27
13 Missing operations 1 274 99.64
14 Pressed Length variations 1 275 100.00
TOTAL 275
Fig.2 Pareto chart: Rotor assembly defects
30.91
59.64
70.55
79.64
86.91
92.36 94.55 96.00 97.09 97.82 98.55 99.27 99.64 100.00
0
20
40
60
80
100
120
Rotor Assembly
Frequency cumm %

3. TECO ELECTRICAL INDUSTRIES PRIVATE LIMITED
Registered Office& Works:
Block No. 277, RS No. 166, Village Raika, Old NH-8,
Vadodara – 391340. E-mail: ramesh@teco.co.in
CIN: U31900GJ2016FTC092378
PREPARED BY : HARSH B JOSHI QUALITY ASSUURANCE AND CONTROL DEPARTMENT, TEIP (VADODARA) 3
 STATOR ASSEMBLY DEFECTS ANALYSIS
Fig. 3. Defects Proportions: STATOR Assembly defects, Elcen
30%
22%
15%
13%
10%
5% 4%
1%
STATOR ASSEMBLY DEFECTS
Slot paper cut
H V Fail
Varnish Burrs
Resistance Fail
Coil cut/ Damage
Lead wire cut
Current unbalance
Surge fail
STATOR ASSEMBLY
Defects QTY
Slot paper cut 25
H V Fail 18
Varnish Burrs 12
Resistance Fail 11
Coil cut/ Damage 8
Lead wire cut 4
Current unbalance 3
Surge fail 1

4. TECO ELECTRICAL INDUSTRIES PRIVATE LIMITED
Registered Office& Works:
Block No. 277, RS No. 166, Village Raika, Old NH-8,
Vadodara – 391340. E-mail: ramesh@teco.co.in
CIN: U31900GJ2016FTC092378
PREPARED BY : HARSH B JOSHI QUALITY ASSUURANCE AND CONTROL DEPARTMENT, TEIP (VADODARA) 4
 Pareto analysis for Stator assembly defects:
Fig.4 Pareto chart: STATOR Assembly defects, Elcen
30.49
52.44
67.07
80.49
90.24
95.12 98.78
100.00
0
20
40
60
80
100
120
Slot paper cut H V Fail Varnish Burrs Resistance Fail Coil cut/
Damage
Lead wire cut Current
unbalance
Stator assembly
Frequency cumm %
Sr No Defects Frequency cumm cumm %
1 Slot paper cut 25 25 30.49
2 H V Fail 18 43 52.44
3 Varnish Burrs 12 55 67.07
4 Resistance Fail 11 66 80.49
5 Coil cut/ Damage 8 74 90.24
6 Lead wire cut 4 78 95.12
7 Current unbalance 3 81 98.78
8 Surge fail 1 82 100.00
Total 82