Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Compensation Scheme for Dead Time and Inverter Nonlinearity Insensitive to IPMSM Parameter Variations
Authors Dong-Min Park ; Kyeong-Hwa Kim
DOI 10.6113/TKPE/2012.17.3.213
Page pp.213-221
ISSN 1229-2214
Keywords dead time; inverter nonlinearity; parameter insensitive; IPMSM; harmonic analysis
Abstract In a PWM inverter-fed IPMSM (Interior Permanent Magnet Synchronous Motor) drive, a dead time is inserted to prevent a breakdown of switching device caused by the short-circuit of DC link. This distorts the inverter output voltage resulting in a current distortion and torque ripple. In addition to the dead time, nonlinearity exists in switching devices of the PWM inverter, which is generally dependent on operating conditions such as the temperature, DC link voltage, and current. The voltage disturbance caused by the dead time and inverter nonlinearity directly influences on the inverter output performance, and it is known to be more severe at low speed. In this paper, a new compensation scheme for the dead time and inverter nonlinearity under the parameter variation is proposed for a PWM inverter-fed IPMSM drive. The overall system is implemented using DSP TMS320F28335 and the validity of the proposed algorithm is verified through the simulation and experiments.