to make contact with the brushes and transfer the current to the appropiate windings in the armature.
Another AnswerA commutator is a rotary reversing switch. It's function is to reverse the direction of the current through the rotor windings as they rotate, to ensure that the current direction around the windings remain in the same direction relative to the magnetic field, so that the torque always acts in the same direction.
describe how to use starting resistors to star a DC motor
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
6V dc motor
A dc series motor can work on dc and ac because dc motors are totally reversible.
To state it simply, a DC brushless motor is not a DC motor. It is an AC motor with an inverter (or electronic commutator) on the front end to make the AC, so you can use a DC input.
Carbon is much stronger and because the motor commuter is spinning copper brushes will wear off quickly.
describe how to use starting resistors to star a DC motor
A DC series-parallel compound motor.
The value and kind of resistors, connected in series or paralell, type of dc motor, what is the purpose, etc.
a general purpose D-C motor can be reversed by changing the polarity of either the armature or the field but not both
Consider using the MARC commuter line.
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
6V dc motor
A synchronous motor is an ac motor that does not run on dc.
Yes it can and the otherway aroud a DC motor can be used as a dynamo
look under commutator
A dc series motor can work on dc and ac because dc motors are totally reversible.