Describe the difference between a permanent magnet charging system and an excited field charging system.
What will be an ideal response?
A permanent magnet alternator has permanent magnets mounted to the rotor. As the rotor is spun by the engine the magnets induce current into the stator windings. An excited field alternator does not use permanent magnets. Instead, the rotor contains a coil of wire or field coil which becomes a magnet when a DC current is passed through it. This magnet is then spun by the engine to induce current into the stator.
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How is the centrifugal blower turned?
What will be an ideal response?