Abstract
In order to improve the Direct Current (DC) bus utilization ratio and realize harmonic suppression of a five-phase induction motor, the SVPWM (Space Vector Pulse Width Modulation) algorithm was researched in depth. Based on an analysis of the present SVPWM algorithm and the volt-second balance principle, a dynamic and adjustable new pattern four-vector SVPWM algorithm was proposed. The algorithm uses the modulation index and zero vector to improve the characteristics of the inductor motor, the function relationship with real-time dynamic ratio between the action–time ratio of the space voltage vector and the modulation index was proposed to maximize DC bus utilization ratio, and the random zero-vector dynamic modulation mode was used to reduce harmonic influence, being able to spread harmonics concentrated around certain frequencies across a wider frequency band and thus produce a more continuous and uniform power spectrum. The new algorithm model was built using Matlab/Simulink, and the simulation and experimental results demonstrated that the algorithm is effective and feasible.
Highlights
Five-phase induction motor drives show several advantages over three-phase induction motors, such as lower voltage with high power, small torque ripple, high fault-tolerance capability, lowerDC (Direct Current) link current harmonics, high reliability, high efficiency, lower current with equal voltage, and high torque density, which suggests many applications in electric locomotive, electric ship propulsion, aerospace engineering, and wind power [1,2,3,4,5,6,7]
Five-phase induction motors are generally driven by a multi-phase voltage/current source inverter, which is composed of a speed/torque control system with a controller and sensor
To improve DC bus utilization and reduce harmonic influence, this paper proposes a dynamic and adjustable new pattern four-vector SVPWM algorithm, which combines a dynamic ratio space vector and an adjustable zero-vector action time modulation mode for a five-phase induction motor to improve the DC bus voltage utilization rate and reduce the harmonics
Summary
Five-phase induction motor drives show several advantages over three-phase induction motors, such as lower voltage with high power, small torque ripple, high fault-tolerance capability, lowerDC (Direct Current) link current harmonics, high reliability, high efficiency, lower current with equal voltage, and high torque density, which suggests many applications in electric locomotive, electric ship propulsion, aerospace engineering, and wind power [1,2,3,4,5,6,7]. Five-phase induction motor drives show several advantages over three-phase induction motors, such as lower voltage with high power, small torque ripple, high fault-tolerance capability, lower. Five-phase induction motors are generally driven by a multi-phase voltage/current source inverter, which is composed of a speed/torque control system with a controller and sensor. The PWM (pulse-width modulation) multi-phase inverter control method and variable-speed multi-phase motor control strategy have become two research hotspots in multi-phase motor applications. SVPWM (space vector pulse-width modulation) using the method of vector combination is widely used in the multi-phase motor driving field because of its advantages of small torque ripple and current distortion, clear concept, better flexibility, and easy digital implementation compared with SPWM. Many SVPWM control methods have been proposed to solve the above problems in different applications [8,9,10,11,12,13,14,15,16,17,18]
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