| Title |
Input Power Estimation Method of a Three-phase Inverter for High Efficiency Operation of an AC Motor |
| Authors |
Do-Hyun Kim, Sang-Hoon Kim ; |
| DOI |
10.6113/TKPE.2019.24.6.445 |
| Keywords |
Input power estimation; PWM inverter; AC motor drive; High efficiency operation |
| Abstract |
An input power estimation method of a three-phase inverter for the high-efficiency operation of AC motors is proposed. Measuring devices, such as DC link voltage and input current sensors, are required to obtain the input power of the inverter. In the proposed method, the input power of the inverter can be estimated without the input current sensor by using the phase current information of the AC motor and the switching pattern of the inverter. The proposed method is more robust to parameter error than conventional method. The validity of the input power estimation method is verified through experiments conducted on a 1 kW permanent-magnet synchronous motor drive system. |