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Alternators Study Unit


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Unit for the study of alternators. Starting, operation and regulation of an alternator without load, half load and full load. This unit comprises:

  • Base structure (painted steel and anodized aluminium).
  • Couplings.
  • Conectors.
  • EMT7. Asynchronous Three-phase motor of squirrel cage.
  • EMT6. A. C. Synchronous alternator motor.
  • VVCA/B. AC. motors speed controller.



Base structure (painted steel and anodized aluminium).
EMT7. Asyncrhonous Three-phase motor of squirrel cage:
Power: 250-300W. Speed: 2769 r.p.m. (50Hz), 3330 r.p.m. (60Hz). Connections: Star/triangle.
Frequency: 50/60 Hz. V.Armature:230/400V (50Hz), 250/440V. (60Hz). I.Armature nominal:1A-0.7A.
EMT6. A. C. Syncrhonous alternator motor:
Power: 250-300W. Speed: 3000 r.p.m. Frequency: 50Hz. Connections: Star/triangle.
V.excitation nominal: 220V D.C. I.Excitation nominal: 0.59A. V.Armature.: 3x220/380V.
VVCA/B. AC motors speed controller:
This unit enables to change the speed of an asynchronous motor, obtaining features which characterize a motor.
Maximum power: 750 W. Frequency from 0 to 60Hz.

Cables and accessories, for normal operation.

This unit is supplied with the following manuals: Required Services, Assembly and Installation, Starting-up, Safety, Maintenance & Practices Manuals.


Some Practical Possibilities of the Unit:

1.- Starting, voltage and frequency regulation in a three-phase alternator.
2.- Typical practices for a three-phase alternator.
3.- Characteristic curve of an alternator without load.
4.- Characteristic curve of an alternator in short circuit.
5.- Characteristic curve of an alternator with load.
6.- Synchronous motor starting.
7.- Working at a frequency given.
8.- Curves in V at constant power (1/4, 1/3, ½,1) PN and different power factors.



  • Electrical supply:Three-phase with neutral and ground, 380V.


  • Dimensions: 750 mm x 250 mm x 250mm. approx.
  • Weight: 30 Kg. approx.