The electrical power consumption in automobiles continues to increase thereby demanding higher power capability of the alternator. The standard alternator today is a claw-pole synchronous machine. The claw-pole alternators have brushes which are maintenance issue; it is not possible to increase power output by increasing the stack length; and the rotor inertia is large due to the steel core and rotor excitation coil. Despite these disadvantages, the claw-pole alternator is still used because of its low cost and ease of manufacturing. An alternator with DC stator excitation, has a laminated salient pole rotor with no excitation coil. Therefore the weight and inertia is less than in the clawpole alternator. The excitation coil is located in the stator and therefore there are no brushes needed. In this type of alternator, the stator has three-phase output coils evenly shifted in space 120 degrees. This paper discusses the principle of operation and develops the mathematical equations for magnetic flux, electromotive force, and torque for a single-phase alternator, a two-phase alternator, and a three-phase alternator.
The principle of operation of a car alternator with DC stator excitation
2004
6 Seiten, 8 Bilder, 1 Quelle
Aufsatz (Konferenz)
Englisch
The Principle of Operation of a Car Alternator With DC Stator Excitation
SAE Technical Papers | 2004
|The Principle of Operation of a Car Alternator With DC Stator Excitation
British Library Conference Proceedings | 2004
|The Principle of Operation of a Car Alternator With DC Stator Excitation
British Library Conference Proceedings | 2004
|The principle of operation of a car alternator with DC stator excitation
Kraftfahrwesen | 2004
|Two-phase alternator with DC stator excitation
Kraftfahrwesen | 2006
|