Permanent Magnet DC motor..current rating

[zuq]

Refering to this motor at 24V operation :**broken link removed**
What does the two current rating mean on this motor..
Continuous current rating =100A
10 minute current =200A

If you look at the motor specs and performance drawings, it says it is rated at 20.5Nm torque at 110A. By looking at the curves it appears that the motor can get up to about 38Nm torque with 200A,
So I can only have this torque for 10mins?? Can it be used at startup???


Just a little bit of clarification on how to interpret these torque ratings would be greatly appreciated..

Thanks everyone

 

[Raza]

The continuous working current when on load is 110 Amperes and if it has to give more torque to the excessive load the this motor can take 220 Amperes maximum for a period of 10 minutes. If the time on 200 Amperes exceeds more than 10 minutes the motor may BURN OUT.

 

[srizbf]

continuous torque:20.5Nm at 110A.
short time max torque :38Nm at 200A.(for 10 mts)

these torque rtaings are based on heating effect on coils and
therefore to avoid burnout of windings.

So , you can get 20.5Nm (110A) continuously from the motor
within permissible temperature rise.

You can also overload the motor , but for short duration only as increased torque calls increased current.

your motor can be overloaded , like at starting , to a max of 38Nm(with200A) for 10 minutes only.(but starting load can be only two times here)


in general , if you want the motor for longer time operation , try to reduce the overloaded torque application to a bear minimum necessity . and not frequently.