| |
Natural field orientation (NFO) for sensorless control of the AC induction motor
| [View]
[Download]
|
| Author(s) |
R. Jönsson; O. Glenberg; H. Hemark; R. Johansson |
| Abstract |
The basic idea of the invention “Natural Field Orientation” (NFO) is described. NFO
permits sensorless operation in four quadrants at all speeds. The main purpose of NFO is to create a
correct field orientation. Then the complete motor control system with current control loops and
different kinds of external control loops can be designed in field coordinates. Estimation of rotor
speed and motor torque is described. NFO is designed according to the “internal model principle”
and consequently it is important to have accurate parameter values in the model, especially during
low speed operation. Two different methods for parameter adaptation are described. One example
with simulation and experimental results is presented. |
| Download |
| Filename: | EPE2003-PP0648 - Joensson |
| Filesize: | 644.3 KB |
|
| Type |
Members Only |
| Date |
Last modified 2003-10-30 by Unknown |
| |
 |