Abstract
Theoretically, motor efficiency is impacted by motor load as well as frequency. The motor equivalent circuit method provides an effective method to estimate motor efficiency. However, the circuit parameters normally have to be determined through field tests, which are impossible to conduct when systems are in service. Based on the fact that measured motor efficiency and power factor data at four load levels under the rated frequency are always published, an iterative method is proposed to identify the circuit parameters using published data. The circuit parameters are used to estimate the motor efficiency under different frequencies. In this paper, the mathematical relations between motor efficiency and power-factor data and the circuit parameters are first formularized. then the least-squares method is utilized to identify the circuit parameters using the published data under the rated frequency, and finally the motor efficiency is estimated under different frequencies.
| Original language | English |
|---|---|
| Title of host publication | ASHRAE Transactions |
| Pages | 118-128 |
| Number of pages | 11 |
| Volume | 119 |
| Edition | PART 2 |
| State | Published - Dec 1 2013 |
| Event | 2013 ASHRAE Annual Conference - Denver, CO, United States Duration: Jun 22 2013 → Jun 26 2013 |
Other
| Other | 2013 ASHRAE Annual Conference |
|---|---|
| Country | United States |
| City | Denver, CO |
| Period | 6/22/13 → 6/26/13 |
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ASJC Scopus subject areas
- Mechanical Engineering
- Building and Construction
Cite this
Estimation of induction motor circuit parameters and efficiency under variable frequencies. / Wang, Gang; Song, Li; Park, Sung Won.
ASHRAE Transactions. Vol. 119 PART 2. ed. 2013. p. 118-128.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Estimation of induction motor circuit parameters and efficiency under variable frequencies
AU - Wang, Gang
AU - Song, Li
AU - Park, Sung Won
PY - 2013/12/1
Y1 - 2013/12/1
N2 - Theoretically, motor efficiency is impacted by motor load as well as frequency. The motor equivalent circuit method provides an effective method to estimate motor efficiency. However, the circuit parameters normally have to be determined through field tests, which are impossible to conduct when systems are in service. Based on the fact that measured motor efficiency and power factor data at four load levels under the rated frequency are always published, an iterative method is proposed to identify the circuit parameters using published data. The circuit parameters are used to estimate the motor efficiency under different frequencies. In this paper, the mathematical relations between motor efficiency and power-factor data and the circuit parameters are first formularized. then the least-squares method is utilized to identify the circuit parameters using the published data under the rated frequency, and finally the motor efficiency is estimated under different frequencies.
AB - Theoretically, motor efficiency is impacted by motor load as well as frequency. The motor equivalent circuit method provides an effective method to estimate motor efficiency. However, the circuit parameters normally have to be determined through field tests, which are impossible to conduct when systems are in service. Based on the fact that measured motor efficiency and power factor data at four load levels under the rated frequency are always published, an iterative method is proposed to identify the circuit parameters using published data. The circuit parameters are used to estimate the motor efficiency under different frequencies. In this paper, the mathematical relations between motor efficiency and power-factor data and the circuit parameters are first formularized. then the least-squares method is utilized to identify the circuit parameters using the published data under the rated frequency, and finally the motor efficiency is estimated under different frequencies.
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M3 - Conference contribution
SN - 9781936504541
VL - 119
SP - 118
EP - 128
BT - ASHRAE Transactions
ER -