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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
3
t
y
p
e
2
5
t
y
p
e
2
3
t
y
p
e
2
5
t
y
p
e
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
W／
(Tester ）
Figure A-6: Checking the Motor only
Ω／
(Tester)
Table A-9: Checking points
Phase A
Phase B
Phase C
Table A-10: Resistance specification
Motor model
YSB2020
YSB3040
YSB4080
YSB5120
l For special Motor winding or long cable over 4m long, please consult with NSK.
Connector lock
(7)
(4)
(3)
(6)
(2)
(5)
(1)
Connector lock
11 6 1
12 7 2
13 8 3
14 9 4
15 10 5
Cable connector
(1) «
(2)
(A+)
(A-)
(3) « (4)
(B+)
(B-)
(5) « (6)
(C+)
(C-)
Winding resistance ( W)
4.5
6.4
5.5
4.7
— A-7 —
Appendix 2: How to Check Motor Condition
Check resistance of the Motor winding
Motor cable
Resolver cable
Motor connector
(5) «
(4)
(A+)
(A-)
(10) «
(9)
(B+)
(B-)
(15) « (14)
(C+)
(C-)
Acceptable value
1. Within ± 30%
2. Variation between Phases A, B, and C: 1.0 maximum
Result
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Troubleshooting
