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What affect does a changing magnetic field strength have on an ac generator power output?
Wiki User
∙ 14y ago
By increasing the field current (current flowing through the rotor windings), the magnetic field generated by these windings will increase. This increased magnetic field will result in a larger current flow in the stator windings (the output of the generator). This in turn causes a larger pull against the rotation of the rotor, causing it to slow down. The governor will then kick in, allowing more steam/ power to the prime mover to keep speed steady.
Assuming all is working correctly, the output power will increase as the magnetic field is increased (to a limit).
Wiki User
∙ 14y ago
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