The starter motor uses electrical energy from a battery to spin the flywheel and crank the engine to start it. The solenoid connects the battery current to the starter motor to provide power. The starter motor works on the principle of electromagnetic induction, where a current applied to a conductor in a magnetic field causes the conductor to rotate. It has a commutator that reverses the current to keep the armature rotating and transmit torque to the engine flywheel through a pinion gear and overrunning clutch.

1. TM UNNES

2. Fungsi Utama
• The main purpose of the starter motor is to
provide initial power to crank the engine to
start it up when the ignition switch is
turned on.

3. Fungsi Komponen
• Battery : energy resource
• Solenoid: connect the current from the
battery to the starter to reduce voltage
drop that would occur by going through the
ignition switch.
• Starter: uses electrical energy to spin the
flywheel which turns the crankcase and
induces combustion.

4. Prinsip Motor
• DC motors interaction of magnetic fields
to convert electrical energy to mechanical
energy
• Current is applied to field and armature
• Conductor tends to move from weak
magnetic field to strong magnetic field.
• For armature to continue rotating, the
current flow must be reversed.

5. Arus Konductor
• Conductor has
magnetic flux
lines around it
• Opposes north
and south fields
which causes
loop of wire to
turn.

6. Magnet
• Has north and
south pole.
• Magnetic lines of
force move from
north to south
pole.
Widjanarko, TM UNNES

7. Konduktor dlm Medan Magnet
• As current travels
through conductor
and fields,
conductor moves.
Widjanarko, TM UNNES

8. • Flux lines
always tend
to want to be
straight
• Fields act on
each other
Widjanarko, TM UNNES

9. Widjanarko, TM UNNES

10. Gerakan Konduktor
dalam Medan Magnet
Widjanarko, TM UNNES

11. Prinsip
Motor
Starter
Widjanarko, TM UNNES

12. Electromagnetic Motor
Widjanarko, TM UNNES

13. Model Motor Starter
Widjanarko, TM UNNES

14. Lokasi Motor Starter
Widjanarko, TM UNNES

15. Motor Starter
Konvensional
Widjanarko, TM UNNES

16. Widjanarko, TM UNNES

17. Konstruksi M Starter Konv.
Widjanarko, TM UNNES

18. Detail Komponen
Widjanarko, TM UNNES

19. Lepasan Komponen
Widjanarko, TM UNNES

20. Komponen Utama
1. Solenoid
2. Armature
3. Kumparan Medan
4. Overruning Clutch
5. Brush dan Holder
Widjanarko, TM UNNES

21. 1. Solenoid
Widjanarko, TM UNNES

22. Solenoid
Widjanarko, TM UNNES

23. Konstruksi Solenoid
Hold in Coil
Pull in Coil
Widjanarko, TM UNNES

24. Widjanarko, TM UNNES

25. Kontak Utama
Widjanarko, TM UNNES
Solenoid

26. Solenoid Model Terpisah
Widjanarko, TM UNNES
Solenoid

27. 2. Armature
Widjanarko, TM UNNES

28. Armature
• Made of Laminated Core
• Solid Steel Shaft
• Commutator
• Lap and Wave Wound (P C141)
Widjanarko, TM UNNES

29. Pengetesan
Armature
Widjanarko, TM UNNES

30. 3. Kumparan Medan
Widjanarko, TM UNNES

31. Widjanarko, TM UNNES

32. Kumparan Medan
• Iron Core & Windings concentrate magnetic field
• Fields have north and south pole based on
direction windings are wound around pole shoes
Widjanarko, TM UNNES

33. 3 Methods of Connecting Fields
• Series Wound
– Maximum torque
when starts
• Shunt Wound
– Used in smaller
motors
• Compound
Wound
– Constant speed
Page C143
Widjanarko, TM UNNES

34. Seri
Widjanarko, TM UNNES

35. Starter Model Movable Pole
Shoe
Widjanarko, TM UNNES

36. 4. Overrunning Clutch +
Pinion
Widjanarko, TM UNNES

37. Overrunning
Clutch + Pinion
Overruning
Clutch
Widjanarko, TM UNNES

38. Konstruksi Overrunning
Clutch
Widjanarko, TM UNNES

39. 5. Sikat dan
Dudukan
Widjanarko, TM UNNES

40. Kerja Motor Starter
Widjanarko, TM UNNES

41. Kerja Motor Starter

42. Kerja Motor Starter
Widjanarko, TM UNNES

43. Kerja Motor Starter
Widjanarko, TM UNNES

44. Starter Jenis Reduksi
Widjanarko, TM UNNES

45. Starter Jenis Reduksi
Widjanarko, TM UNNES

46. Starter Jenis Reduksi
Widjanarko, TM UNNES

47. Starter Reduksi
Widjanarko, TM UNNES

48. Solenoid, Clutch, Pinion
Widjanarko, TM UNNES

49. Overruning Clutch
Overruning Clutch + Pinion
Widjanarko, TM UNNES

50. Solenoid
Widjanarko, TM UNNES

51. Cara Kerja
Widjanarko, TM UNNES

52. Widjanarko, TM UNNES

53. Widjanarko, TM UNNES

54. Widjanarko, TM UNNES

55. Starter Jenis Planetari
Widjanarko, TM UNNES

56. Konstruksi St Panetari
Widjanarko, TM UNNES

57. Konstruksi St Panetari
Widjanarko, TM UNNES

58. Overrunning Clutch
Widjanarko, TM UNNES