Abstract
This paper studies current measurement issue of all digital field oriented control of AC motors. The paper focuses on the effect of antialiasing filter and also on the sampling of the fundamental components of the motor current. The antialiasing filter, which suppresses the high frequency component of the motor current, introduces cross coupling effects on the D and Q axis current regulation and limits the bandwidths of the current regulator because of its phase lag. In this paper a novel sampling technique is proposed to sample the fundamental component of the current without antialiasing filter. It is based on the characteristic of the symmetry pulse width modulation. With this technique, the bandwidth of current regulator can be extended to the limit given by switching frequency of the inverter and more precise torque regulation is possible.
| Original language | English |
|---|---|
| Pages (from-to) | 334-338 |
| Number of pages | 5 |
| Journal | Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) |
| Volume | 1 |
| State | Published - 1996 |
| Event | Conference Record of the 1996 IEEE Industry Applications 31th IAS Annual Meeting. Part 1 (of 4) - San Diego, CA, USA Duration: 6 Oct 1996 → 10 Oct 1996 |