International Journal of Electrical and Computer Engineering (IJECE) Vol. 14, No. 5, October 2024, pp. 4907~4920 ISSN: 2088-8708, DOI: 10.11591/ijece.v14i5.pp4907-4920  4907 Journal homepage: http://ijece.iaescore.com Comparative design of harmonic current reduction in variable speed drive using space vector pulse width modulation and hybrid pulse width modulation Yulianta Siregar 1 , Farel Situmeang 1 , Nur Nabila Mohamed 2 1 Department of Electrical Engineering, Faculty of Engineering, Universitas Sumatera Utara, Medan, Indonesia 2 School of Electrical Engineering, College of Engineering, University Technology MARA, Shah Alam, Malaysia Article Info ABSTRACT Article history: Received Mar 12, 2024 Revised Jun 20, 2024 Accepted Jul 2, 2024 In industry and commerce, three-phase induction motors are frequently utilized as the primary power source for machinery. However, to increase motor performance efficiency, induction motors also need a tool for speed control. The variable speed drive (VSD) is one tool used to control the rotation speed of three-phase induction motors. Since VSD is a non-linear load, harmonic distortion will result from it. The space vector pulse width modulation (SVPWM) injection method and the hybrid pulse width modulation method were the two techniques employed by the author in this study to lower the current in the VSD. With the SVPWM injection approach, the variable speed drive's current total harmonic distortion (THD) values in the R, S, and T phases dropped to 3.77%, 3.53%, and 2.19% from 7.14%, 7.17%, and 7.58%. Keywords: Hybrid pulse width modulation Induction motors Space vector pulse width modulation Total harmonic distortion Variable speed drive This is an open access article under the CC BY-SA license. Corresponding Author: Yulianta Siregar Department of Electrical Engineering, Faculty of Engineering, Universitas Sumatera Utara Dr. T. Mansur No.9, Medan City, North Sumatera Province 20222, Indonesia Email: julianta_srg@usu.ac.id 1. INTRODUCTION Induction motors with three phases are widely used as machine prime movers in commercial and industrial domains. The reason is that induction motors have several advantages, such as simple design, high efficiency, relatively affordable costs, and easy maintenance [1]–[3]. Even though induction motors have the advantages mentioned previously, several disadvantages need to be considered, including speed control. In industries, a regulation is needed so that the speed of the induction motor can be adjusted to achieve better work efficiency. A variable speed drive (VSD) is one tool used to control the rotation speed of a three-phase induction motor. VSD is a device that has components that form a nonlinear load. A nonlinear load is a load that produces a nonlinear output waveform where the current flow is not proportional to the impedance and voltage changes. VSD consists of several components, including a rectifier, inverter, and direct current (DC) link, which connects the rectifier to the inverter and functions as a DC voltage filter. The problem with using a VSD is the emergence of harmonics that can cause losses, such as a decrease in the quality of the electric power system due to heating of the equipment, a decrease in power factor, relay failure, and reduced efficiency [4]–[6]. One way to reduce harmonics is to use the pulse width modulation (PWM) technique. With the help of frequency and amplitude parameters, the pulse width is modulated using the PWM approach. There are various PWM methods, including space vector PWM, hybrid PWM, modified sinusoidal PWM, and sinusoidal PWM [7]–[10]. Previous research regarding the comparative study of voltage source inverter (VSI) fed induction motor harmonic reduction using space vector pulse width modulation (SVPWM) and sinusoidal PWM [11]