0
\$\begingroup\$

Generally DC generators are classified according to the ways of excitation of their fields. There are three methods of excitation.

  1. Field coils excited by permanent magnets – Permanent magnet DC generators.
  2. Field coils excited by some external source – Separately excited DC generators.
  3. Field coils excited by the generator itself – Self excited DC generators.

How to control the output voltage for the different types of the dc generator and how to reverse the voltage polarity?

\$\endgroup\$
  • 3
    \$\begingroup\$ Permanent magnet generators usually don't have field coils. \$\endgroup\$ – Brian Drummond Nov 26 '16 at 17:57
0
\$\begingroup\$

The voltage of a permanent-magnet generator must be controlled by controlling the generator speed. The voltage sent to loads could be controlled by sending the voltage first to a voltage regulator or converter. The voltage of a separately-excited DC generator can be controlled by controlling generator speed, by using a variable field supply, or by a combination of both. A self-excited dc generator can be controlled by generator speed or by a rheostat or electronic circuit that reduces the field current. A combination could also be used.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.