NTL P3800-1A User manual

- Fruhmann GmbH - 7343 Neutal, Austria
Motor / Generator Model
P3800-1A
Function model for the demonstrative explanation of the physical laws
as function of an electric motor. All spare parts are clearly organized
1 c) Shunt wound motor
ut the iron core solid into the moving coil and attached it to B.
Connect A1 to S1 and A2 to S2 (or A2 to S1, turning direction) with
the help of the black connecting leads.
ut one of the red connecting leads into the A1socket (or A2, turning
direction) and one of the blue connecting leads into the A2 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 measu-
rement with a measuring device. The readings are to be noted.
2 a) DC generator
ut the two magnetic (homopolar) between the pole plates.
Connect A1 to L1 and A2 to L2 (or A1 to L2 and A2 to L1, direction of
current !). Set the driving disk into motion and observe the lighting
of the bulb. Then the voltage and current is measurement with a
measuring device like e.g. 3210-1C. The readings are to be noted.
2 b) External pole generator
ut the iron core solid into the moving coil and attached it to B.
Connect A1 to L1, L2 to S2 and S1 to A2. Set the driving disk into
motion and observe the lighting of the bulb. Then the voltage and
current is measurement with a measuring device like e.g. 3210-1C.
The readings are to be noted.
2 ) External pole generator
ut the iron core solid into the moving coil and attached it to B.
Connect A1 to S1, A2 to S2, S1 to L1 and S2 to L2. Set the driving
disk into motion and observe the lighting of the bulb. Then the volta-
ge and current is measurement with a measuring device like e.g.
3210-1C. The readings are to be noted.
A2
B
L2
A1
S1
L1
S2
Motor Generator
A1.. Anchor socket 1
S1.. Stator coil socket 1
L1 .. Lamp socket 1
B .. 2mm-bush for moving coil SE
A2 .. Anchor socket 2
S2 .. Stator coil socket 2
L2 .. Lamp socket 2

Required material to work with 3800-1A Motor / Generator model
1x 3800-1A Motor / Generator model
2x 3410-1K Magnet AlNiCo
1x DE309-1S Light bulb, 4V/40mA, E10
1x 3911-2V Moving coil, SE
1x 391-1K Iron core, solid
2x 3310-2E Connecting lead, 25 cm, black
1x 3310-3A Connectiing lead, 50 cm, red
1x 3310-3B 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
( 3410-1K) or electric magnet ( 3911-2V).
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
ut the two magnetic (homopolar) between the pole plates.
ut one of the red connecting leads into the A1 socket (or A2,
turning direction! ). ut 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. 3210-1C. The readings are to be noted.
1 b) Series motor
ut the iron core solid into the moving coil and attached it to B.
ut 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. 3210-1C. The readings are to be noted.