Sunday, December 1, 2013

Standard Terminal Markings of DC (Direct Current) Motors

Standard terminal markings, as developed by NEMA, are given for series, shunt and compound motors in figure 1, figure 2 and figure 3 respectively. These figures all show compensating-field as well as commutating-field windings since they are intended to cover both fractional horsepower and integral horsepower motors. Fractional horsepower motors do not generally use compensating windings and they may not use commutating-field (interpole) windings.

The markings are combinations of letters and arabic numerals, generally, these are as follows:

- Armature - A1, A2
- Control signal lead - C
- Series field - S1, S2
- Shunt field - F1, F2

Did you enjoy reading this post, then consider subscribing by Email to Technovation - Technological Innovation and Advanced Industrial Control Technologies

E arn while you learn to become an Electrician Apprentice!

D iscover the method of harnessing the most powerful and most efficient way to generate natural, clean electricity!

A lternatively, discover how to power your home with Solar and Wind Energy!

Reversing DC Motors

Procedure for reversing direct current motors

Direct current motors are reversed by changing the direction of current flow through the armature or through the field. In series motors, the usual procedure is to reverse the current through the armature. Figure 1 shows this method.

All that is necessary is to interchange the leads on the brush holders. Figure 2 shows the series motor reversed by changing the current in the field circuits.

Did you enjoy reading this post, then consider subscribing by Email to Technovation - Technological Innovation and Advanced Industrial Control Technologies

E arn while you learn to become an Electrician Apprentice!

D iscover the method of harnessing the most powerful and most efficient way to generate natural, clean electricity!

A lternatively, discover how to power your home with Solar and Wind Energy!

Related Posts Plugin for WordPress, Blogger...

ShareThis

Useful Further Reading Resources

Lijit Ad Wijit