Title :
High first torque harmonic due to insufficient function of dead time compensation in PWM inverters
Author :
Plotkin, Juriy ; Schaefer, Uwe ; Hanitsch, Rolf
Author_Institution :
Berlin Univ. of Technol., Berlin
Abstract :
A new source for the DC current offset in the PWM inverter-fed loads is found. A significant irregularity in dead time voltage compensation due to a very small offset in phase current measurement is the cause for it. In the phase currents and voltages, high DC offsets appear at low current magnitudes, which lead to a first torque harmonic in the drive. Recommendations how to avoid this effect are given in the paper.
Keywords :
AC motor drives; PWM invertors; harmonics; machine control; torque; DC current offset; PWM inverters; dead time compensation; first torque harmonic; phase current measurement; voltage compensation; Automatic control; Automation; Current measurement; Delay; Magnetic field measurement; Pulse width modulation; Pulse width modulation inverters; Time measurement; Torque control; Voltage; Control of Drive; Converter control; Electrical Drive; Harmonics; Pulse Width Modulation (PWM);
Conference_Titel :
Power Electronics and Applications, 2007 European Conference on
Conference_Location :
Aalborg
Print_ISBN :
978-92-75815-10-8
Electronic_ISBN :
978-92-75815-10-8
DOI :
10.1109/EPE.2007.4417695
