MODIFIED SVPWM SWITCHING SCHEMES FOR HARMONIC SUPPRESSION IN FIVE PHASE VSI FED INDUCTION MOTOR DRIVE
Raja. D Ravi. G
electrical machines and drives
Power electronic converters play a major role in electric drives and their controls. Multi-phase motors are popular for various electric drive applications. This enables us to use the multi-phase AC machines than 3-ϕ machines. The multiphase AC drives are fed from voltage source inverters (VSIs) and it requires a suitable PWM method of control. This paper presents the various space vector PWM (SVPWM) techniques for 5-ϕ VSI fed 5-ϕ Induction Motor (IM) drives. Modified SVPWM switching techniques are introduced based on medium, large and the combined effect of medium and large vectors, which provides the operation with reduced % THD in the output voltages. Various switching schemes for 5-ϕ VSI fed 5-ϕ IM drive is investigated in terms of harmonics present in the output voltage. MATLAB Simulation results are included in this paper to show and verify the theoretical concepts.
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