Abstract
In order to eliminate the influence of d-q axis coupling effect of permanent magnet synchronous linear motor, restrain the internal disturbance of permanent magnet synchronous linear motor (PMSLM) and suppress the thrust ripple of the motor, this paper analyses the coupling effect of d-q axis from the perspective of d-q axis mutual inductance and cross-coupling voltage of d-q axis. Based on that, the influence of the d-q axis coupling effect on the thrust ripple was studied quantitatively by establishing the motor model which inductance coupling effect and voltage coupling effect is considered. Moreover, the coupling effect of the control system is compensated by the voltage feedforward method. The simulation and experiment show that the vector control considering the coupling effect of the d-q axis improves the control accuracy of d-axis current and q-axis current, restrains the thrust ripple of the motor, and achieves high precision control requirements of the permanent magnet synchronous linear motor servo system.
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