GENERATOR

Model Generator Assembling Instructions

Enjoy assembling.

< Adhesive is not required. >

Story of generator

  In 1832,  the first generator based on Faraday's principle was built by Hippolyte Pixii, a French instrument maker.  When the north and south poles of a permanent magnet are fixed as  field and a coil spins in  the magnetic  field,  induced current  flows passes  through the coil. Generated electricity (electromotive  force)  can  be obtained by using commutator and brush.  A f ter   that ,   many  peop le including Siemens  in Germany have made modif ications  of generator.  Power generation methods are  classif ied  based  on  the power that rotates the rotary shaft connected with  the coil. Any and every power generation uses the same principle.

Q  Using human power ......................................Manual power generation Force of wind ...............Wind force power  generationQ  Using forces ............

Force of water ..............Hydraulic power   of nature generation  Force of sea waves ......Wave-power generation Coal and oil ..................Thermal power  generationQ  Using power ............Geothermal heat ..........Geothermal power   of steam    generation  Heat from nuclear ........Nuclear power  reaction  generation

Fabricating materials a Check that all the necessary materials are available.

Tools to prepareNipper, screw driver, hammer, scale, knife and othersIt is preferable to prepare soldering gun, solder and file for plastic model.

Precautions before assembly

Q  Read this Assembly Instructions thoroughly.Q  Cut out parts cleanly with a knife or nipper.  Q  Remove burr or extra portions with a knife 

or nipper.

Chassis parts Armature parts15 pieces

Approx. 20 m

Commutator parts

Field parts Brush parts

Wiring parts

Including 2 spares(4 pieces in total)

Gear parts

Other parts

65 teeth60 teeth

(2 pieces in total including one spare)

10 teeth

a  Part W is lubricant called liquid paraffin for smooth rotation.  Apply it to the portions marked with      in drawings.  Do not apply oil other than it.

  In 1831, Michael Faraday, an English chemist and physicist, discovered  following phenomenon. When  inserting an magnet into  the coil  (solenoid coil)  that  is wound with conductive wire and connected to an electric galvanometer,  the  indicator of  the galvanometer swings to show an momentary current flow through the coil. When the magnet  is pulled out quickly, an momentary current flows in reverse direction.   This phenomenon is called electromagnetic induction.

  Th r ough   h i s   expe r imen t ,   i t   was   f ound   t ha t   s ame electromagnetic  induction occurs when the coil  is moved while the magnet is fixed and when a live coil is used as substitute for the magnet.

Magnet

Electric galvanometer

Solenoid coil

CoilRotary shaft

FieldCommutator and brush

Generated electricity (electromotive force)

Approx. 2 m

Assembly

Q Set out armature plates 5 with groove and direction of front and rear faces aligned, and then pass shaft 9 through them.

Q Sandwich them in between parts 6 and 7.

Q Cut out three 6-m wires from enamel wire 8. Be careful not to twist them together.

Q Wind cut-out wires 8 carefully around portion A, B and C respectively.

   (Possible to make about 100 turns. Be careful not to allow the winding to protrude out of the circumference of part 5.

Q Remove enamel coating on both end portions of enamel wire completely with sandpaper T.

Q Twist winding ends of A and B together. Twist winding ends of B and C, and C and A in the same way.

Q Insert commutator bars B into the hole of part :, and then fold back them outward.

Q Set part A in : without damaging B.

Q Match the protrusion of part : with the groove of 6.

Q Push the end of shaft 9 forcibly so that it protrudes about 8 mm from part 7.

Q Wind the twisted enamel wires around commutator bar B.

Q Tilt the connection portion of B toward the coil.

Q When inserting shaft 9 into pinion gear N, place part R on part 9 and hit it lightly to fix the shaft firmly.

Make the shaft protrude by about 3 cm.

Good winding Bad winding

About 8 mm

Q Set in fields C on both sides. Q Set brush plate D in portion A as shown in the drawing.

Q Remove vinyl coating of power cord H about 3 cm from the top and wind it around part F.

Q Set in brush F as shown in the drawing and insert parts E to fix it.

Q Place large gear L on R, drive shaft O until it stops.

Q Set in bearing 3 and fix it.

Q Pass part J over handle K, and insert I to fix it.

Q Sandwich cover 1 between handle K and large gear L and fasten them with screws Q.

(Match holes in the gear and handle.)

Q Place gear M on part 4 and insert shaft P to fix as shown in the drawing.

Q Set part 4 in 2, and cover it with part 1.

Q Fix part 1 to 2 with screws U.Q Fit alligator clip E to the top of the power cord.

Q Check that the handle turns smoothly by turning it slowly. If the handle is heavy, check for incorrect assembly and wiring from the start without turning it forcibly. (Refer to page 7.)

Q After confirming that the handle turns smoothly, check that bare light bulb S lights up.

Pull out. Pinch a pencil.Wind wire around it.

Cover

Examples of generator utility

Turning the handle of the generator produces electricity of about 5 volts and 1 A.

Let’s drive a model car.Q  Remove the battery from the model car, connect the power 

cord of the generator, and turn the handle of the generator while keeping the switch turned on.

Q  You can move the car forward or reverse where you want it to go and can change the speed as well.

Try to play a cassette or listen to the radio.Q  Remove the battery, connect the 

power cord to the jack, and turn the handle with a constant force.

Let’s drive a model electric locomotive of N-gauge (9 mm).Q  Set the rail track, connect generator 

power cord to the power supply tag, and turn the handle.

Q  You can move the locomotive forward or reverse where you want it to go and can change the speed as well.

a CAUTION 1 Do not make an abrupt

stop of handle turning nor reversing.

a CAUTION 2 Do not turn the handle of the generator with

the alligator clips G contacted each other.

To do so may cause the tooth of the gear to get chipped

Jack

Jack

Check for following points when the generator does not produce electricity or the handle is heavy.

After completing the assembly, turn the handle gently for checking.A Handle turns smoothly but bare light bulb S does not light up.  1. Check that the enamel coating of the connection wire is removed completely.  2. Check that the connection between the armature coil and commutator bar B is correct.  3. Check that commutator bar B contacts with brush F properly.  4. Check for incorrect wiring in other B Handle does not turn smoothly.  1. Check that lubricant W is applied to required portions.  2. Check that every gear engages correctly.C Handle turns heavily and bare light bulb S does not light up.  1. Check that 3 enamel wires of the armature are wound in a same direction.  2. Check that the winding is connected correctly at both ends.  3. Check for direct contact between the enamel wire and the armature plate.

a Correct use of the generator  1. When turning the handle, start to turn it slowly and increase turning speed gradually.  2. When reversing the handle, do not reverse it abruptly. Be sure to stop turning once and reverse it.

a If tooth of gear gets chipped Q Use a spare gear L to reassemble the generator.