Is it correct to assume that a typical universal motor like they ones used in an AC drills for example, if supplied with rectified AC will increase efficiency, due to a reduction in iron losses? My thinking is the following:
- The area under the hysteresis loop is decreased Ph = Kh × f × Bn watts m-3 (n~= 1.6) (Ph = power loss due hysteresis)
- Eddy currents are decreased
Pe= Ke × f2 × B2 (Pe = power loss due E. currents)
TIA for any pertinent comments.