Which of the following generators provide approximately constant voltage load to full load?
Answers
On the other hand, AC generators must operate at a very steady synchronous speed, so all voltage regulation must be done on the rotor’s excitation field, whether that is manually or by an electronic automatic voltage regulator that both monitors output voltage and adjusts field excitation without operator interference.
They all can, if you properly adjust the field excitation using either manual or automatic voltage regulation. Shaft and Rotor speed is also a factor, and can also be used to adjust voltage in the case of a DC generator, however, the output of the generator’s prime mover is a key factor in determining shaft speed: most engines provide the highest torque at a narrow range of shaft speed, going faster or slower will provide less torque for the generator to convert to electrical power. Running at a fixed speed, flat compounded DC generators have better self-regulation than DC shunt generators, which is superior to that of DC series generators.
On the other hand, AC generators must operate at a very steady synchronous speed, so all voltage regulation must be done on the rotor’s excitation field, whether that is manually or by an electronic automatic voltage regulator that both monitors output voltage and adjusts field excitation without operator interference.