What are the differences between a DC motor and DC generator?

Answer 1

the one and only the main difference b/n them is a dc motor takes the electrical energy as its input and gives mechanical energy as its output where as in the dc generator takes the mechanical energy as input and gives electrical energy as its out put

In both the case we can't get 100% efficiency because total input can't be converted into output.

Answer 2

The main difference is how power is put to them. A dc motor and generator are the same thing, they just feed them power at different spots. For a motor comes in the commentator through the stater back to commentator. A Generator brings power into the stater through the commentator back to the stater. Some old school small engine used one unit to do both jobs they just feed power to the correct side for the job they needed it to do.

Answer 3

A DC motor can be operated by just supplying a DC voltage to it.

A stepper motor needs to have an external controller to feed its coils (3,4,... coils) one at a time or using a special sequence.

Internally, the DC motor contains several coils (1) and several permanent magnets (or coils) (2).

The magnetic field of the coils (1) is switched such to interact with the magnetic field of magnets (or coils) (2) therefore creating a moment of rotation.

The switching of the currents is made internally, through brushes or electronic circuits.

The stepper motor has a similar construction, with one noticeable difference.

Internally the stepper motor has coils (1) that are fed externally with currents by the controller, creating an interaction with the magnetic field of the magnets (or coils) (2) such that a rotational moment is created.

If the controller does keep the same coils supplied with current, the stepper motor behaves like 'locked'.

Answer 4

A DC generator converts mechanical energy into direct current electrical energy.

A DC motor converts direct current electrical energy into mechanical energy.

Answer 5

One (the motor) use electrical power and converts it to mechanical rotational power and the other (the generator) does vice versa ie converts mechanical rotational power to electrical power

Answer 6

there is absolutely no difference,since the operational functions on both are mechanically alike.the only slight difference which doesn't really matter is the functional gear.

Answer 7

The basic difference between a motor and a generator is that a motor converts electrical energy into mechanical energy while a generator converts mechanical energy into electrical.