Rotating induction apparatus

Abstract

An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator comprising a plurality of slots and full span concentrated windings, with the windings being electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a drive waveform signal, that has a fundamental frequency, and the drive waveform signal drives the inverter system. The drive waveform signal has a pulsing frequency and is in fixed phase relation to the fundamental frequency. Additionally, the inverter system may be fed by a drive waveform signal that is fed through at least one signal delay device.

1 . An electrical rotating apparatus comprising: 
 an inverter system that outputs at least six phases, wherein the number of phases is a multiple of three;    a stator comprising a plurality of slots and full span concentrated windings, wherein said windings are electrically coupled to said inverter system;    a rotor electromagnetically coupled to a magnetic field generated by said stator; and    whereby said windings are grouped into a plurality of three phase groups, wherein said plurality of three phrase groups is equal to the number of phases divided by three.    
     
     
         2 . The electrical rotating apparatus of  claim 1 , wherein at least one of said plurality of three phase groups of windings is capable of being shut off wherein the rest of said plurality of three phase groups are not shut off.  
     
     
         3 . The electrical rotating apparatus of  claim 1 , further comprising a signal generator generating a drive waveform signal.  
     
     
         4 . The electrical rotating apparatus of  claim 3 , wherein said drive waveform signal drives said inverter system and said drive waveform signal has a fundamental waveform component.  
     
     
         5 . The electrical rotating apparatus of  claim 4 , further wherein said drive waveform signal has a pulsing waveform component, wherein said pulsing component is in fixed phase relation to said fundamental waveform component.  
     
     
         6 . The electrical rotating apparatus of  claim 5 , wherein the number of pulses of said pulsing waveform component per cycle of said fundamental waveform component is less than the number of phases.  
     
     
         7 . The electrical rotating apparatus of  claim 5 , wherein the number of pulses of said pulsing waveform component per cycle of said fundamental waveform component is equal to an even multiple of the number of phases.  
     
     
         8 . The electrical rotating apparatus of  claim 4 , further wherein said drive waveform signal has a pulsing waveform component, wherein said pulsing component is not in fixed phase relation to said fundamental waveform component.  
     
     
         9 . The electrical rotating apparatus of said  claim 1 , wherein said apparatus is operated in a non-linear region of a saturation curve of said stator.