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TM UNNES

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.

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.

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.

Arus Konductor

• Conductor has magnetic flux lines around it

• Opposes north and south fields which causes loop of wire to turn.

Magnet• Has north and

south pole.

• Magnetic lines of force move from north to south pole.

Widjanarko, TM UNNES

Konduktor dlm Medan Magnet

• As current travels through conductor and fields, conductor moves.


• Flux lines always tend to want to be straight

• Fields act on each other



Gerakan Konduktor dalam Medan Magnet


Prinsip Motor Starter


Electromagnetic Motor


Model Motor Starter


Lokasi Motor Starter


Motor Starter Konvensional



Konstruksi M Starter Konv.


Detail Komponen


Lepasan Komponen


Komponen Utama

1. Solenoid

2. Armature

3. Kumparan Medan

4. Overruning Clutch

5. Brush dan Holder


1. Solenoid


Solenoid


Konstruksi Solenoid

Hold in Coil

Pull in Coil



Kontak Utama

Widjanarko, TM UNNESSolenoid

Solenoid Model Terpisah

Widjanarko, TM UNNESSolenoid

2. Armature


Armature

• Made of Laminated Core• Solid Steel Shaft• Commutator• Lap and Wave Wound (P C141)


Pengetesan Armature


3. Kumparan Medan



Kumparan Medan

• Iron Core & Windings concentrate magnetic field• Fields have north and south pole based on

direction windings are wound around pole shoes


3 Methods of Connecting Fields

• Series Wound– Maximum torque

when starts

• Shunt Wound– Used in smaller

motors

• Compound Wound– Constant speed

Page C143


Seri


Starter Model Movable Pole Shoe


4. Overrunning Clutch + Pinion


Overrunning Clutch + Pinion

Overruning Clutch


Konstruksi Overrunning Clutch


5. Sikat dan Dudukan


Kerja Motor Starter


Kerja Motor Starter

Kerja Motor Starter


Kerja Motor Starter


Starter Jenis Reduksi






Starter Reduksi


Solenoid, Clutch, Pinion


Overruning Clutch

Overruning Clutch + Pinion


Solenoid


Cara Kerja





Starter Jenis Planetari


Konstruksi St Panetari


Konstruksi St Panetari


Overrunning Clutch
