Title :
A novel approach to analyze over-voltages due to PWM switching patterns in long cable PWM drive
Author :
Yuejun Liu ; Yanshu Jiang ; Lulu Qi ; Rui Zhang
Author_Institution :
Sch. of Autom., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
A novel theoretical analysis and a practical technique to model the reflected wave in PWM ASD-Motors is present. This technique could be used to evaluate the risk of motor insulation deterioration due to over-voltages in ASD system. It concerns especially lower or higher than 2pu over-voltages at motor terminals caused by the PWM switching patterns. It is shown that, theoretical peak voltage of 3pu and 5pu may be reached for some switching conditions with long motor leads. The simulation that PWM switching patterns result in lower or higher than 2pu over-voltages at motor terminals is validated by PSpice software.
Keywords :
AC motor drives; power cable insulation; pulse width modulation; variable speed drives; AC motors; ASD system; PSpice software; PWM ASD-motors; PWM switching patterns; adjustable speed drive; long cable PWM drive; motor insulation risk; over-voltages; Integrated circuit modeling; Mathematical model; Pulse width modulation; Software; Surges; Switches; Variable speed drives; Adjustable Sped Drive (ASD) system; incident voltage; over-voltage; reflected voltage; switching patterns;
Conference_Titel :
Strategic Technology (IFOST), 2011 6th International Forum on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-4577-0398-0
DOI :
10.1109/IFOST.2011.6021085
