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Suzhou Firstall Electrical Machine & Technology Co., Ltd. is a leading Supplier of professional-quality power alternators/generators, Brushless Synchronous AC Alternator , ac generator ,as well as professional service on international trade. FIRSTALL markets its products and service its partner around the world from the office located in Suzhou and Wuxi city Jiangsu province, China.
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A claw-pole type rotor in an ac generator
In an ac generator having a claw-pole type rotor, a stator winding has a plurality of front and rear coil ends. Each of the rear coil ends has an inside bent portion extending radially outward from the inner periphery of the rear end of the stator core and an inside main portion extending axially from the bent portion to form a backwardly expanding space around the rotor.
A rotor of a conventional brushless alternator has a pair of pole cores having a base portion and a plurality of claw pole pieces extending axially from the base portion disposed at opposite ends of the rotor. A stator core of conventional ac generators have a plurality of coil ends extending from opposite ends thereof to surround the circumference of the claw poles. A centrifugal cooling fan is fixed to an end of the rotor to cool the plurality of coil ends.
A main object of the brushless ac alternator is to provide an improved structure for reducing fan noise and noise generated when cooling air is interrupted by the coil ends, thereby improving cooling efficiency.