chata matha .
Friction and windage causes mechanical loss in DC machines.
Constant losses Those losses in a d.c. generator which remain constant at all loads are known as constant losses. The constant losses in a d.c. generator are: (a) iron losses (b) mechanical losses (c) shunt field losses
Copper losses are also referred to as I^2 R losses. Copper loss is due to heating due to the current passing through the copper windings.
Friction in the bearings and in the commutator, and windage loss. Electrical resistance of the armature and field windings and the brushes.
Electrical degrees and mechanical degrees in dc motors are related by the equation: Deg(elec) = (Number of Poles/2) *(Deg(mech))
All DC machines are works based on the principle of FARADAY'S LAW OF ELECTROMAGNETIC INDUCTION.
No
05 types of dc machines
machines
Yes you can turn a motor into a generator, if it is a permanent magnet motor.
A DC motor converts electrical energy to mechanical energy. The converted energy is provided to a mechanical load.A DC generator converts mechanical energy to electrical energy. The converted energy is provided to the electrical load (voltage, current referring load).A DC motor can be used as a DC generator and vice-versa.
Carbon brushes used in DC machines because carbon is soft material and it does not generate spikes when contact with commutator