Patent ID: 11881796
Assignee: ROLLS-ROYCE PLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 7:
8. The method of claim 1, in which the PMSM drive is controlled to operate at a switching-to-fundamental ratio (SFR) of less than or equal to 10, the SFR being defined as:, SFR
  =
  
   
    
     f
     inv
    
    (
    
     H
     ⁢
     z
    
    )
   
   
    
     f
     e
    
    (
    
     H
     ⁢
     z
    
    )
   
  
 

wherein finv is a switching frequency of power electronics associated with the PMSM, and fe is a fundamental electrical frequency of the PMSM.