Abstract
In a conventional method speed, speed sensorless stator flux-oriented (SFO) induction motor drive, when the estimated speed Is transformed into the sampled-data model using the first-forward difference approximation, the sampled-data model has a modeling error which, in turn, produces an error in the rotor speed estimation. The error included in the estimated speed is removed by the use of a low pass filter (LPF). As the result, the delay of the estimated speed occurs in transients by the use of the LPF. This paper investigates the problem of a conventional speed sensorless SFO system due to the delay of estimated speed In the field weakening region. In addition, this paper proposes a method to estimate exactly speed by using Luenberger observer. The proposed method is verified by simulation and experiment with a 5-hp induction motor drive.
| Original language | English |
|---|---|
| Pages (from-to) | 1460-1464 |
| Number of pages | 5 |
| Journal | PESC Record - IEEE Annual Power Electronics Specialists Conference |
| Volume | 3 |
| State | Published - 2003 |
| Event | 2003 IEEE 34th Annual Power Electronics Specialists Conference - Acapulco, NM, United States Duration: 15 Jun 2003 → 19 Jun 2003 |