Assertion: motor | /r/HasProperty | operated
Facets:
value: from very low frequency ac supplies
type: OTHER
value: with being common
type: OTHER
Source sentences:
text: Although the heating effects are reduced by using laminated pole-pieces, as used for the cores of transformers and by the use of laminations of high permeability electrical steel, one solution available at the start of the 20th century was for the motors to be operated from very low frequency AC supplies, with 25 and 16 ​2⁄ 3 Hz operation being common.
text: The service factor is a multiplier that may be applied to the rated power to allow a motor to be operated at higher than its rated hp.