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Enhanced Sigma-Delta A/D Converter for High Performance Drives
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| Author(s) |
H-G. Köpken; D. Eckardt |
| Abstract |
High performance variable speed drives require a precise motor current measurement. The enhanced
sigma-delta converter achieves high speed and high accuracy and is insensitive to signal ripple and
EMC due to its integral measurement characteristic. It provides both a fast 8 bit signal for over
current and short circuit protection and a high precision 12/14 bit signal every 64 µs for the control
loop. This paper presents the inner structure of the converter and the measurement results obtained
with a prototype realization in a standard CMOS mixed-signal ASIC. |
| Download |
| Filename: | EPE1999 - PP00209 - Köpken.pdf |
| Filesize: | 677.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-24 by System |
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