Required material to work with P3800-1A Motor / Generator model
1x P3800-1A Motor / Generator model
2x P3410-1K Magnet AlNiCo
1x DE309-1S Light bulb, 4V/40mA, E10
1x P3911-2V Moving coil, SE
1x P391-1K Iron core, solid
2x P3310-2E Connecting lead, 25 cm, black
1x P3310-3A Connectiing lead, 50 cm, red
1x P3310-3B Connection lead, 50 cm, blue
Important note
To ensure a good performance of the experiments,
4 important points are to be checked:
1) stable, magnetic flow
2) small air gap to the anchor
3) correct brush-cummutator positioning
4) strong way of magnetizing due to a permanent magnet
(P3410-1K) or electric magnet (P3911-2V).
Attention
Due to manufacturing tolerances, a finde adjustment of the single
components can be necessary.
The reversal of the commutator happens, when the anchor reaches
the magnetic end, therefore when the anchor is in horizontal position.
If the brushed are too long, the commutator has to be positioned
accordingly. This has also be done if the brushes are too short.
If the anchor or commutator are not positioned correctly, the motor
will not work properly and the generator will generate only a very low
amount of current.
Experiments
1. Electric motor
a) Simple DC motor
b) Series motor
c) Shunt-wound motor
2. Generator
a) DC generator
b) External pole generator
c) Internal pole generator
1 a) Simple DC motor
Put the two magnetic (homopolar) between the pole plates.
Put one of the red connecting leads into the A1 socket (or A2,
turning direction! ). Put one of the blue connecting leads into the
A2 socket (or A1, turning direction! ).
Apply DC on the red and blue connecting leads
(polarity = turning direction) and observe the turning of the anchor.
If it it necessary, tip the anchor a little bit with the hand.
To apply load on the motor, the belt can be applied to the belt disk
and the anchor pulley. To apply additional load, a holder with slotted
weights can also be attached.
Then the voltage and current is measurement with a measuring
device like e.g. P3210-1C. The readings are to be noted.
1 b) Series motor
Put the iron core solid into the moving coil and attached it to B.
Put one of the red connecting leads into the A1socket and one of the
blue connecting leads into the S1 socket (or S2, turning direction! ).
Apply DC on the red and blue connecting leads
(polarity = turning direction) and observe the turning of the anchor.
If it it necessary, tip the anchor a little bit with the hand.
To apply load on the motor, the belt can be applied to the belt disk
and the anchor pulley. To apply additional load, a holder with slotted
weights can also be attached.
Then the voltage and current is measurement with a measuring
device like e.g. P3210-1C. The readings are to be noted.
