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Variable speed drives (VSDs hereafter) are usually very dynamic systems that dispose of high power and very fast time responses. For this reason the VSDs control and electrical parts should be optimally tuned to achieve the target operation abilities. But if the VSDs are able to work in an optimal way, it is necessary to know a lot of VSDs parameters. Some of them are concerning about mechanical parts...
The article presents evaluation of indirect torque measurement accuracy of converter-fed induction motors. The low-power (5.5 kW) motor supplied by Siemens SINAMICS S120 frequency converters was used to perform the measurement. The converter was set up to vector control method, also the effects of speed sensor presence or absence were compared. The dynamometer test bench with gauge strain measurement...
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