What different betweeen D.C motor & D.C machian?

Question

I confused with this topic.

Answer 1

DC motors are fairly simple to understand. They are also simple to make and only require a battery or dc supply to make them run.

Here are some great sites which describe how DC motors work.

http://www.howstuffworks.com/motor.htm
http://www.members.home.net/rdoctors/ (misc motor information)

Answer 2

D.C Motor can be Operated as D.C Generator without major modifications. So in general it is known as D.C machine. In general DC Machine can convert Mechanical energy into / from electrical energy.
The greatest advantage of DC motors may be speed control. Since speed is directly proportional to armature voltage and inversely proportional to the magnetic flux produced by the poles, adjusting the armature voltage and/or the field current will change the rotor speed. Today, adjustable frequency drives can provide precise speed control for AC motors, but they do so at the expense of power quality, as the solid-state switching devices in the drives produce a rich harmonic spectrum. The DC motor has no adverse effects on power quality.

Answer 3

They are theoritically the same. A DC machine can be run as a motor or generator. If it's used as a motor then it's a DC motor, otherwise it's a DC generator. In both cases, it is a DC machine.

Answer 4

Two names for the same thing: a device that can convert direct current into or from mechanical motion.

Answer 5

Nothing. They're just two different ways of sayingthe same thing.

HTH

Doug