| |
Regular-Sampled Current Measurement in AC Drives Using Delta-Sigma-Modulators
| [View]
[Download]
|
| Author(s) |
Wilhelm PETERS |
| Abstract |
A delta-sigma modulator converts an analog input signal into a high-frequency stream of single bits with out-off band noise. A high-resolution signal is extracted from the bit-stream with an appropriate low pass filter. The paper emphasizes on the utilization of SincK-filters as low pass filter and proposes a sampling method that is synchronized with the controller to incorporate a regular sampling. The paper also covers the detailed analysis of SincK-filters (known as decimation filter) with different decimation ratios and filter orders, and a detailed analysis of the impulse response for the synchronization of the filter with the controller. The SincK-filter is integrated into a field-oriented control for permanent magnet synchronous motors. The whole system is realized on a FPGA-based control platform. The performance is validated by experimental results. |
| Download |
| Filename: | 0970-epe2009-full-18033070.pdf |
| Filesize: | 1.115 MB |
|
| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
| |
 |