To avoid sparking they need to be placed at zero point
commutator
leave the brushes of the motor at the position where the induced voltage is zero
No. A d.c. 'shunt' motor is one whose stator's field windings are connected in parallel with its rotor windings ('shunt' is simply an archic term for 'parallel'); it does not mean that the rotor can function without brushes.
Carbon Brush yang terbuat dari campuran tembaga dan Zinc atau lainnya.
AC generators (alternators) usually have a dc supply to the rotor coils, supplied through slip-rings with carbon brushes. Because the slip-rings can be made very smooth the life of the brushes is greatly extended when compared with brushes on the commutator of a dc motor or an ac commutator motor. Cars generate electrical power with a three-phase AC alternator, connected directly to the battery through rectifier diodes. The alternator voltage is controlled by the voltage regulator, which works by controlling the dc supply to the rotor.
To overcome the sparking at brushes.
Bushes, with reference to DC motors is a brushed DC motor which is a motor that designed to run from a direct current (DC) power source. This type of motor is an internally committed electric motor.
a motor Will do work by consuming power a generator is just the opposite
Commutator and brushes.
commutator
It is the process of conversion of generated ac voltage into the armature of a dc generator to dc voltage at the terminal of the dc generator by use of pair of brushes and commutator. OR It is the process of conversion of given dc voltage at the terminal of the dc motor to ac voltage in the armature windings in a dc motor by use of pair of brushes and commutator.
Carbon is much stronger and because the motor commuter is spinning copper brushes will wear off quickly.
leave the brushes of the motor at the position where the induced voltage is zero
leave the brushes of the motor at the position where the induced voltage is zero
Armature Commutator Brushes Axle Field Magnet DC power supply
Armature Commutator Brushes Axle Field Magnet DC power supply
Armature Commutator Brushes Axle Field Magnet DC power supply