Starter Motor, What's Inside?

The video tutorial explains the components and operation of a starter motor. It covers the solenoid, rotor, commutator, brushes, stator, and field windings. The interaction of electromagnetic fields is detailed, showing how they cause rotor rotation. The solenoid's role in energizing the motor and the function of the overrunning clutch and pinion gear are also discussed. The video concludes with a brief mention of planetary gears and their impact on torque.

What is the primary function of the solenoid in a starter motor?

• To cool the motor

• To generate electricity

• To engage the pinion gear with the flywheel

• To provide lubrication

What is the role of the commutator plates in the starter motor?

• To generate a magnetic field

• To insulate the rotor

• To connect the rotor to the battery

• To allow electricity to flow through the rotor coils

How do the brushes in a starter motor function?

• They provide structural support

• They cool the motor

• They generate electricity

• They push against the commutator plates to allow electricity flow

What happens when the solenoid coil is energized?

• The motor stops

• The iron piston is attracted and moves backward

• The rotor stops rotating

• The pinion gear disengages

What is the purpose of the overrunning clutch in a starter motor?

• To protect the motor from burning out

• To increase the motor's speed

• To decrease the motor's torque

• To engage the solenoid

How does the overrunning clutch protect the starter motor?

• By cooling the motor

• By allowing the pinion to rotate freely when the engine speed exceeds the starter speed

• By locking the pinion gear in place

• By increasing the motor's power

What additional component might some starter motors use to increase torque?

• A cooling fan

• An extra solenoid

• A larger battery

• A planetary gear