| 摘要 |
958,757. Electricity generators. GENERAL MOTORS CORPORATION. Sept. 19, 1962 [Sept. 28, 1961], No. 35599/62. Heading H2A. [Also in Division G3] An electricity generator for use in heavy equipment, e.g. off-the-road vehicles, comprises an alternator having a stationary field winding 76 energized via rectifier bridge diodes 240, 242, 250, 252, 256, 258, Figs. 6 and 8, and a transistor voltage regulator 366, 326 &c. from a stationary 3 Ph. star-connected armature winding 90 which is also connected through semi-conductor diode rectifiers 40, 42, 44, 60 62, 64, Figs. 4, 6 and 9, to provide a direct current main output at terminals 54, 68, the latter rectifiers and the voltage regulator being supported by the alternator frame assembly 10, 12. The rotor comprises polepieoes 112, 114 having interlaced fingers 112a, 114a brazed to a manganese-bronze ring 116 and is secured to a shaft 94 driven from the vehicle fan belt by a pulley 120 and driving a fan 122. The frame assembly 10, 12 is of die cast aluminium and totally encloses the alternator, being provided with seals 26, 98, 100 &c.; it has ribs 30 and a heat sink 38 carrying the rectifiers 40, 42, 44 which are cooled by air impelled within a shroud 59 by the fan 122. The shroud forms part of a closed compartment 198 housing a board 192 which mounts the voltage regulator components and interconnects them with printed circuits. The regulator circuit maintains the output direct voltage constant by means of a Zener diode 318, Fig. 6, and the two transistors 326, 366, the value of the voltage being adjustable by the selective insertion of a screw 294, Fig. 7 (not shown), into one of the holes 282, 284, 286, 290, Fig. 8, to which are connected a series of resistors. A permanent magnet 84, Fig. 10 (not shown), is provided to ensure the presence of a magnetic field when starting. Reference, has been directed by the Comptroller to Specification 840,306. |
