How to test a DC Shunt motor ? What tests should be performed ?

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How to calculate the power of winding to get the exact power of the resistors for the testing circuit that you provided rfredel ?
 

Hello munzir,

yes you can use this circuits.

Speed control by resistors in the current way of the armature is normaly. To make the speed higher by attenuation of the field in a shunt motor is only a compromise if you don't want to change a motor.

Regards

Rainer
 

Hello phatcreators,

look for the nameplate of the motor. For example look for this nameplate of a shunt motor:

The red numbers are the voltage and the current of the armature and the blue numbers are the voltage and current of the field winding.

The following example shows the nameplate of a series motor.

Here you see only one voltage and current (24V and 13A).

With the voltage and the current you can calculate the power of the resistors. (P = V*I).

Regards

Rainer
 

so the wattage of the resistors would be , P = 24 * 13 = 312 watts

How larger would be the resistors then ? In Size
 

Hello phatcreators,

I can not give a size of these resistors. Sometimes you can see this resistors on the roof of older electric trains.

**broken link removed**.

In earlier time these resistors are oil cooled.

Regards

Rainer
 

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