| 21. | It also has a rotor element and a stator.
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| 22. | Thus the magnetic flux through the stator varies sinusoidally at a rapid rate.
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| 23. | Buick also incorporated a variable-pitch stator in 1955 for greater flexibility.
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| 24. | Each stage was a pair of rotors ( there were no stators ).
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| 25. | In normal operation the rotor magnet follows the stator field at synchronous speed.
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| 26. | The variable-pitch stator was eliminated after 1967.
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| 27. | The poles of the armature are slightly displaced from those of the stator.
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| 28. | Poor rotor / stator fit improper tolerances due to degradation with time.
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| 29. | The gap between rotor and stator is also made as small as possible.
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| 30. | During start-up the resistors reduce the field strength at the stator.
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