NSK MEGATORQUE M-ESB-YSB2020AB300 - Appendix 2: How to Check Motor Condition

— A-7 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
Appendix 2: How to Check Motor Condition
Check resistance of the Motor winding
Appendix 2: How to Check Motor Condition
l Examine resistance and insulation resistance of Motor winding to check if the Motor is in
normal condition. It can be regarded as normal if all check results are within the specification.
l Firstly, check the winding resistance including the Motor cable. If the result is not satisfactory,
check the Motor only.
1
Check resistance of the Motor winding
Figure A-5: Checking with the cable
(Tester）
(4)
(3)
(2)
(1)
Connector lock
Resolver cable
Motor cable
W／
(7)
(6)
(5)
Figure A-6: Checking the Motor only
11 6 1
12 7 2
13 8 3
14 9 4
15 10 5
(Tester)
Connector lock
Ω／
Table A-9: Checking points
Cable connector Motor connector Result
Phase A
(1)
«
(2)
(A+) (A-)
(5)
«
(4)
(A+) (A-)
Phase B
(3)
«
(4)
(B+) (B-)
(10)
«
(9)
(B+) (B-)
Phase C
(5)
«
(6)
(C+) (C-)
(15)
«
(14)
(C+) (C-)
Table A-10: Resistance specification
Motor model
Winding resistance (
W)
Acceptable value
YSB2020
4.5
YSB3040
6.4
YSB4080
5.5
YSB5120
4.7
1. Within ± 30%
2. Variation between Phases A, B, and C: 1.0 maximum
l For special Motor winding or long cable over 4m long, please consult with NSK.