Abstract 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.
IN A FREQUENCY CONVERTER COMPRISING A ROTOR AND A STATOR, AN EXCITATION LOW FREQUENCY MULTI-PHASE WINDING AND A GENERATOR LOW FREQUENCY MULTI-PHASE WINDING, SAID ROTOR CARRYING ONE OF SAID LOW FREQUENCY WINDINGS AND SAID STATOR CARRYING SAID OTHER LOW FREQUENCY WINDING, AN EXCITATION INTERMEDIATE FREQUENCY MULTI-PHASE WINDING AND A GENERATOR INTERMEDIATE FREQUENCY MULTI-PHASE WINDING, SAID ROTOR CARRYING ONE OF SAID INTERMEDIATE FREQUENCY WINDINGS AND SAID STATOR CARRYING SAID OTHER INTERMEDIATE FREQUENCY WINDING, MEANS INCLUDING SAID LOW FREQUENCY WINDINGS FOR PRODUCING WITHIN THE BODIES OF SAID ROTOR AND OF SAID STAFTOR A CORRESPONDING LOW NUMBER OF PAIRS OF MAGNETIC POLWSM AND MEANS INCLUDING SAID INTERMEDIATE FREQUENCY WINDINGS FOR PRODUCING IN SAID BODIES A CORRESPONDING HIGHER NUMBER OF PAIRS OF MAGNETIC POLES, THE RATIO BETWEEN SAID LOW NUMBER OF PAIRS OF MAGNETIC POLES AND SAID HIGHER NUMBER OF PAIRS OF MAGNETIC POLES BEING DEFINED BY THE RATIO BETWEEN SAID LOW AND SAID INTERMEDIATE FREQUENCIES, SAID LOW FREQUENCY EXCITATION WINDING BEING HOUSED IN GROOVES WHICH ARE LOCATED UPON THE MEDIAN AXES OF SAID HIGHER NUMBER OF PAIRS OF MAGNETIC POLES.
Claim 2
Dependent Claim
177 words
IN A FREQUENCY CONVERTER COMPRISING A ROTOR AND A STATOR, AN EXCITATION LOW FREQUENCY MULTI-PHASE WINDING AND A GENERATOR LOW FREQUENCY MULTI-PHASE WINDING, SAID ROTOR CARRYING ONE OF SAID LOW FREQUENCY WINDINGS AND SAID STATOR CARRYING SAID OTHER LOW FREQUENCY WINDING, AN EXCITATION INTERMEDIATE FREQUENCY MULTI-PHASE WINDING AND A GENERATOR INTERMEDIATE FREQUENCY MULTI-PHASE WINDING, SAID ROTOR CARRYING ONE OF SAID INTERMEDIATE FREQUENCY WINDINGS AND SAID STATOR CARRYING SAID OTHER INTERMEDIATE FREQUENCY WINDING, MEANS INCLUDING SAID LOW FREQUENCY WINDINGS FOR PRODUCING WITHIN THE BODIES OF SAID ROTOR AND OF SAID STAFTOR A CORRESPONDING LOW NUMBER OF PAIRS OF MAGNETIC POLWSM AND MEANS INCLUDING SAID INTERMEDIATE FREQUENCY WINDINGS FOR PRODUCING IN SAID BODIES A CORRESPONDING HIGHER NUMBER OF PAIRS OF MAGNETIC POLES, THE RATIO BETWEEN SAID LOW NUMBER OF PAIRS OF MAGNETIC POLES AND SAID HIGHER NUMBER OF PAIRS OF MAGNETIC POLES BEING DEFINED BY THE RATIO BETWEEN SAID LOW AND SAID INTERMEDIATE FREQUENCIES, SAID LOW FREQUENCY EXCITATION WINDING BEING HOUSED IN GROOVES WHICH ARE LOCATED UPON THE MEDIAN AXES OF SAID HIGHER NUMBER OF PAIRS OF MAGNETIC POLES.