NSK EDD Megatorque Motor - Driver Unit

10. Maintenance
— 10-4 —
10.4.3. Driver Unit
 Electrolytic capacitor
 Life of the electrolytic condenser largely depends on use conditions. The life of electrolytic capacitor is
approximately 10 years under the condition below. However, we do not guarantee the life of 10 years even
the conditions belows are met, since the unknown electrical over stress may be applied to the capacitor.
 We do not replace the electrolytic capacitor only. Please consult with NSK sales or representative for
replacement.
Table 10-4: Approximated life of electrolytic capacitor
Name of part
Function
Approximated life
Use conditions
Electrolytic
condenser
 Smoothes power
voltage.
 Others
10 years
* This is not the
guaranteed life.
 Annual average of ambient temperature: 30[[[°C]]] or less
 Average load factor: 80% or less
 Average daily operation time: 20 hours or less
*These are not guaranteed values.
 Relays
 The Driver Unit contains two relays. Approximated life is 100 000 times of switching.
 We do not replace a relay only. Please consult with NSK sales or representative. It requires replacing the
printed circuit board.
Table10-5: Rough idea of life (Relays)
Item
Approx. life
Definition to count the number of switching
Relay
100 000
times
Relay 1
One time: Each switching of servo ON/OFF.
Relay 2
One time: Each activation of the dynamic brake (Servo ON/OFF, Alarm/Reset)