AC/DC generator
A working model of an alternating and direct current generator with measuring instruments: seven demonstrations from the design of the machine to its reversibility.
Demonstration apparatus - alternating and direct current generator on a base with a measuring panel. It consists of a stator with a permanent magnet, a rotor with brushes and a commutator assembly, a drive mechanism, four measuring instruments (AC and DC voltmeters and milliammeters), a load indicator lamp and a current type switch. Designed for seven demonstrations: the design of generators of both types, the occurrence of EMF during armature rotation, the difference between alternating and direct current, the dependence of voltage on rotational speed, operation under load and the reversibility of the machine in electric motor mode.
- 1.Base with measuring panel - 1 pc.
- 2.Permanent magnet (stator) - 1 pc.
- 3.Rotor (armature) - 1 pc.
- 4.Brushes - 2 pcs.
- 5.Commutator assembly on the rotor shaft - 1 pc.
- 6.Drive mechanism - 1 pc.
- 7.AC voltmeter - 1 pc.
- 8.DC voltmeter - 1 pc.
- 9.AC milliammeter - 1 pc.
- 10.DC milliammeter - 1 pc.
- 11.Socket with light bulb (load indicator) - 1 pc.
- 12.AC/DC switch - 1 pc.
- Design and principle of operation of an alternating current generator
- Design and principle of operation of a DC generator
- Electromagnetic induction: the occurrence of EMF when the armature coil rotates in a magnetic field
- Difference between AC and DC
- Dependence of output voltage and current on rotor speed
- Generator operation under load: comparison of output voltage at idle and when a load is connected (incandescent lamp, 16 Ohm resistor)
- Reversibility of an electric machine: operation of the generator in electric motor mode when voltage is applied to the output terminals
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