3B SCIENTIFIC PHYSICS 1017801 Manual De Instrucciones página 6

When set up as an AC generator (current collec-
tors reconnected on to the slip ring), it is possible
to obtain an output close to a sinusoidal voltage.
3. Technical data
Operating modes:
Nominal voltage of motor:
No-load voltage
In generator mode
Base plate:
Weight including magnet 0.85kg approx.
4. Additionally required equipment
1 ESCOLA 10 multimeter
or
1 USB oscilloscope 2x50 MHz
1 DC power supply, 20 V, 5 A (@115 V) 1003311
or
1 DC power supply, 20 V, 5 A (@230 V) 1003312
Experiment leads
5. Operation

Place the horseshoe magnet on the base
plate in such a way that the armature coil is
between its two poles.

Attach the yoke to the back of the magnet in
order to reduce the magnetic field.
Fig. 1 Horseshoe magnet with yoke
5.1 Configuration as DC motor

Insert the current collectors into the right-
hand pair of sockets of the terminal panel on
the base plate (see Fig. 2).
DC motor,
DC and AC generators
9 V
2.5 V
130 x 150 mm²
1006810
1017264

Spread out the carbon brushes slightly and
guide them over the disc.

Push the current collectors onto the base
plate as far as they will go (without bending
the carbon brushes).

Take the drive ring off the drive pulley (for
easy starting).

Plug the power supply into the sockets.

Supply the motor with no more than 12 V.
It is necessary to give the rotor a push to get it
started from its initial position (armature coil ver-
tical).
No voltage may be applied to the motor while it is
stationary (start the motor turning first).
5.2 Configuration as generator

Thread the drive ring over the armature shaft
and drive pulley and use the crank to turn the
armature shaft.

Connect the multimeter to the connector
sockets. Observe how far the needle moves.
5.2.1 DC generator

Insert the current collectors into the right-
hand pair of sockets of the terminal panel on
the base plate (see Fig. 3).
It is possible to tap a DC (pulsating DC) voltage
across the commutator (see Fig. 4).
5.2.1 AC generator

Insert the current collectors into the left-hand
pair of sockets of the terminal panel on the
base plate (see Fig. 5).
It is possible to tap an AC voltage closely resem-
bling a sine wave across the slip ring (see Fig. 6).
6. Storage, cleaning, disposal

Keep the equipment in a clean, dry and dust
free place.

Do not clean the unit with volatile solvents or
abrasive cleaners.

Use a soft, damp cloth to clean it.

The packaging should be disposed of at local
recycling points.

Should you need to dis-
pose of the equipment it-
self, never throw it away in
normal domestic waste.
Local regulations for the
disposal of
equipment will apply.
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electrical