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 more than three phases;    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 inverter system comprises at least one module, wherein said at least one module comprises an inverter.    
     
     
         2 . The electrical rotating apparatus of  claim 1 , wherein said inverter system outputs twelve or more phases.  
     
     
         3 . The electrical rotating apparatus of  claim 1 , wherein said inverter system outputs eighteen or more phases.  
     
     
         4 . The electrical rotating apparatus of  claim 1 , wherein said inverter system comprises at least two modules.  
     
     
         5 . The electrical rotating apparatus of  claim 4 , wherein the number of modules is less than or equal to the number of phases output from said inverter system.  
     
     
         6 . The electrical rotating apparatus of  claim 4 , wherein the number of modules equals the number of phases output from said inverter system.  
     
     
         7 . The electrical rotating apparatus of  claim 1 , wherein said at least one module comprises at least one controlled switch.  
     
     
         8 . The electrical rotating apparatus of  claim 7 , wherein said at least one controlled switch is a transistor.  
     
     
         9 . The electrical rotating apparatus of  claim 1 , wherein said at least one module further comprises a signal delay device.  
     
     
         10 . The electrical rotating apparatus of  claim 1 , wherein said at least one module comprises a controlled switch and a signal delay device.  
     
     
         11 . The electrical rotating apparatus of  claim 1 , further comprising: a signal generator generating a drive waveform signal.  
     
     
         12 . The electrical rotating apparatus of  claim 11 , wherein said drive waveform signal drives said inverter system and said drive waveform signal has a fundamental waveform component.  
     
     
         13 . The electrical rotating apparatus of  claim 12 , 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.  
     
     
         14 . The electrical rotating apparatus of  claim 13 , wherein the number of pulses of said pulsing waveform component per cycle of said fundamental waveform component is less than the number of phases.  
     
     
         15 . The electrical rotating apparatus of  claim 13 , 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.  
     
     
         16 . 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.  
     
     
         17 . The electrical rotating apparatus of  claim 1 , further wherein a pulsing frequency of said drive waveform signal is not in fixed phase relation to said fundamental frequency.  
     
     
         18 . The electrical rotating apparatus of said  claim 1 , wherein said apparatus is operated at densities greater than 150,000 lines per square inch (2.33 Tesla).