Subject: Automobile Engineering

Topic: Electrical System, Starting Systems & Alternator

Difficulty: Medium

Continuous current & Voltage regulator:
Fig 13.1 shows various parts of the regulator. It consists of the cut out relay, current regulator, dynamo & field coil. When dynamo(a) is started , the voltage builds up. When sufficient voltage is reached, the cut-out relay comes into action. By this, armature(4) is pulled towards the soft iron core of the cut-out relay. This gives a corrention between the dynamo & battery.

When the dynamo starts running at a higher speed, The voltage regulator immediately comes into action. Armature(6) is pulled away from the contact points of the voltage regulator . The contact points are now opened. Point resistance(7) is then introduced in the field coil, thereby bringing down the voltage.

1) cut-off relay
2) current regulator
3) voltage regulator
4,5,6) armature
7) Point resistance
8) swamp resistance
9) Dynamo
10) Field coil.