Title :
Motor Overvoltage Limitation by Means of a New EMI-Reducing PWM Strategy for Three-Level Inverters
Author :
Videt, Arnaud ; Le Moigne, Philippe ; Idir, Nadir ; Baudesson, Philippe ; Franchaud, Jean-Jacques ; Ecrabey, Jacques
Author_Institution :
Schneider Toshiba Inverter Eur., Pacy-sur-Eure, France
Abstract :
Pulsewidth-modulated (PWM) voltage-source inverters are known to provoke high-frequency disturbances in motor-drive applications, particularly when long cables are used. Indeed, the parasitic elements of the cable, along with steep voltage transitions due to semiconductor switchings, are responsible for the conducted electromagnetic emissions and high overvoltages on the motor terminals. Therefore, several specific PWM schemes have been proposed in order to reduce these phenomena without requiring large passive filters. However, strategies that reduce common-mode currents (mainly conducted electromagnetic emissions) tend to increase the overvoltages generated on the motor. This paper focuses on a new PWM strategy that reduces the common-mode currents generated by three-level inverters. It provides a control algorithm that makes sure that the motor overvoltages never exceed those of conventional strategies while improving the electromagnetic-compatibility performance of the drive.
Keywords :
PWM invertors; electromagnetic compatibility; electromagnetic interference; interference suppression; motor drives; overvoltage; switching; EMI-reducing PWM strategy; PWM voltage-source inverter; common-mode current reduction; conducted electromagnetic emissions; electromagnetic-compatibility performance; high-frequency disturbance; motor overvoltage limitation; motor-drive application; parasitic cable element; pulsewidth-modulation; semiconductor switching; three-level inverter; voltage transition; Common-mode currents; electromagnetic compatibility (EMC); motor overvoltages; neutral-point-clamped (NPC) inverter; pulsewidth modulation (PWM);
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2009.2027517