DC electric generator - Dynamo
Dynamo is a rotary electrical machine, converting mechanical energy from the rotor to electric energy in the form of direct electric current. It is a DC electric generator.
Educational phase: application
- connection wires
- crocodile clips
- generator (MOSEM set)
Plug devices in accordance with this picture. Set the voltage on multimeter and range up to 20V (depending on the used generator).
When turning the knob clockwise multimeter records the generated voltage, whose magnitude is proportional to the speed of rotation.
When turning in the opposite direction, multimeter records a negative voltage, so current flows through a circuit in the opposite direction.
The generator is a rotary engine for the conversion of mechanical energy into electrical energy. The dynamo generates DC current.
Dynamo action is also based on electromagnetic induction. The excitation current in the stator windings in the stator produces a magnetic flux. The winding rotor during its rotation in the magnetic field induces an alternating voltage which is a commutator mounted on the rotor shaft, converted to DC voltage. From the DC commutator brushes away the terminal machine is taken where necessary electric current.
Application in practice
Production of electricity, lighting, bike, power plants, ...
Control issues and challenges
- What is the difference between the alternator and dynamo?