GB1088375A - Alternators - Google Patents

Abstract

1,088,375. Alternators. JOSEPH LUCAS (INDUSTRIES) Ltd. Dec. 11, 1964 [Feb. 21, 1964], No. 7272/64. Heading H2A. In an alternator for, e.g., road vehicles, comprising brushes 41, 42 through which can be energized a field coil 18 carried by a rotor (16), Fig. 1, rotatably mounted within a casing 11 through which a fan (25) rotatable with the rotor draws air, and a stator (12) surrounding the rotor and from whose windings 13 ... 15 the alternator output is obtained through a full wave rectifier, the latter comprises two sets 26 ... 28 and 31 ... 33 of semi-conductor diodes each equal in number to that of the stator winding phases, the respective sets having their anodes and cathodes connected to respective stator winding phases and their cathodes and anodes connected to a surface of a respective conductive member 44, 47 which provides the alternator output terminals 57, 58 and the sole support of the diodes and is fixed to the casing in such a position that each of the surfaces extends in a plane parallel with the rotor axis. The field coil 18 is supplied through a third set of diodes 36 ... 38 in a similar conductive member 62, and the three members form an assembly which is secured by screws 48, 49 to casing radial arms 23, 24 with the member 47 earthed thereto. The brushes 41, 42 engaging slip rings (71, 72) on the interdigitated rotor are pivoted on a plate 68 carrying a voltage regulator 39 which includes transistors and a Zener diode. In another embodiment, Figs. 5 ... 7 (not shown), the nine diodes are mounted between the three conductive members (86 ... 88), arranged as parallel strips, and three parallel bus-bars (83 ... 85) at right angles to the strips.