Gramme DC motor/dynamo
Motor/dinamo de corriente continua de Gramme
- Date
- 1871 · confidence medium
- Place
- Paris, France
- Credited to
- Zénobe Gramme
- Field
- Matter & energy
What it is
Gramme developed a ring-armature dynamo that generated much smoother direct current at higher voltages than earlier machines; exhibited in Vienna in 1873, it became the first usefully powerful electric motor, at a time when electric motors had barely gone beyond laboratory curiosities or toys.
The source consulted does not precisely confirm the year and place of the machine's first construction, only that it already existed by the 1873 Vienna exhibition; 1871 in Paris is taken as the date commonly cited elsewhere.
What it led to
- First industrial electric motors
- Widespread large-scale direct-current generation
Built on
- Pacinotti ring armature1860
- Earlier dynamos and electrical armatures