An approach for motor efficiency with variable frequency drives

Gang Wang, Zufen Wang, Zhitao Han, Li Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Variable frequency drives (VFDs) completely change the power conditions and efficiency of connected motors. Due to insufficient data, energy simulation programs, such as EnergyP/us, directly use manufacturer efficiency data by ignoring VFD impacts. The paper is to validate an approach to convert manufacture efficiency data to actual motor efficiency with VFDs using the equivalent circuit method. First the motor circuit parameters are estimated based on manufacturer data; and then applied to simulate the motor efficiency with VFDs, which is validated by the measured efficiency. The result shows the approach can effectively calculate the motor efficiency with VFDs using manufacture data.

Original languageEnglish (US)
Title of host publicationASHRAE Transactions - 2019 ASHRAE Annual Conference
Number of pages3
ISBN (Electronic)9781947192355
StatePublished - 2019
Externally publishedYes
Event2019 ASHRAE Annual Conference - Kansas City, United States
Duration: Jun 22 2019Jun 26 2019

Publication series

NameASHRAE Transactions
ISSN (Print)0001-2505


Conference2019 ASHRAE Annual Conference
Country/TerritoryUnited States
CityKansas City

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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