Double-T armature

Double-T armature - Shape of armature used in some motors and generators. Two 'T' shapes extending from an axis.

Its use in early Siemens dynamos caused a pulsing, variable DC output which was improved upon by the Gramme dynamo.

Another improvement is the three-pole armature ('triple-T' armature) as in this image :

See also

• Brushed DC electric motor

References

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