Permanent magnet synchronous drive system based on rheometer with high precision and wide speed regulation
CHEN Ya-qian
ZHANG Bing-yi
FENG Gui-hong
SUN Lei-dao
YU Yong-hang
Abstract：In order to ensure that the test system for the drilling fluid rheometer can work normally in harsh environment,a driving system where the speed could be continuously adjusted in a wide range and the speed resolution might be high was designed. The fractional slot structure was adopted in the motor, the harmonic content and cogging effect of the motor could be reduced by choosing the proper slot match and optimizing the waveform of air gap flux density, and thus the speed resolution and running stability of the motor could be improved. The constant voltage frequency ratio control mode in combining with the sensorless control algorithm and space vector pulse width modulation technology was adopted to improve the precision of open-loop control for the system. The coupling simulation model for both motor and its control system was established. The analysis results show that through optimizing the dynamic characteristics of fractional slot motor system, the motor can smoothly run over a wide speed range and has a high speed resolution, and the requirement in the driving system of rheometer can be satisfied.
Keywords：drilling fluid rheometerpermanent magnet motorfractional slotspeed adjustment in wide rangevelocity resolutionconstant voltage frequency ratiospace vector pulse width modulationsensorless control algorithmcoupled field-circuit simulation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 126-132 )