NSK EDD Megatorque Motor - Resistance Check of Motor Winding

Appendix
— A-6 —
Appendix 2: How to Check Motor Condition
 Examine resistance and insulation resistance of Motor windings to check if the Motor is in working condition. The
Motor is in normal condition if the checking procedures below are all satisfactory.
 First, check the winding resistance including the Motor cable. If the result is not satisfactory, check the Motor only.
Resistance check of Motor winding
Fig A-5: Check with the Cable set
Fig A-6: Check the Motor only
 Do not turn the rotor while checking the Motor winding.
Table A-5: Checking points
Cable connector
Motor connector
Result
øU øV
(1)  (2)
(U) (V)
(1)  (2)
(U) (V)
øV øW
(2)  (3)
(V) (W)
(2)  (3)
(V) (W)
øW øU
(3)  (1)
(W) (U)
(3)  (1)
(W) (U)
Table A-6: Specifications of resistance of Motor winding
Motor type
Winding resistance ()
Specification
PS1004
70.3
1. ± 30% of error
2. Difference between each phase UV, VW, and WU
is less than 15%
PS1006
24.4
PS1012
10.6
PS1018
5.1
PS3015
5.8
PS3030
4.6
PS3060
2.4
PS3090
3.5
PN2012
15.0
PN3045
1.9
PN4135
2.6
PN4180
3.2
PX3050
2.2
 Please ask NSK sales or representative for a Motor with special winding specifications and a Cable longer than 4 m.
Tester
( 1)
( 2)
( 3)
( 4)
( 5)
( 6)
( 7)
( 8)
Ω／
( 9)
Tester
Ω／
( 1 )
( 2 )
( 3 )
( 4 )