| 摘要 |
989,634. Frequency changers. M. C. KISSLING. Aug. 29, 1961 [Sept. 9, 1960], No. 31112/61. Heading H2A. A synchronous machine which may be used as a frequency-changer has windings for both pole-numbers mounted on both members. As shown, the rotor carries a two-pole winding 7 in deep slots 8 and an eight-pole winding 9 in surface slots, both windings being D.C. excited. The stator carries polyphase windings 2, 3 of two and eight poles respectively. Stator and rotor may be interchanged. Various arrangements of the rotor slots are described each having windings of different pole-numbers. The rotor slots may be of zig-zag form, Fig. 3, to improve waveform. The rotor slot-wedges may serve as a squirrel-cage. A circuit diagram of the device used as a frequency-changer is shown and also a cross section of the machine which includes an exciter with both wound stator and rotor and having the excitation fed to the main rotor through shaft-mounted rectifiers. Specification 989,633 is referred to. |
