Effects of Modulation Index on Harmonics of SP-PWM Inverter Supplying Universal Motor

Solangi, Asif A.; Gul, Mehreen; Shaikh, Rameez; Umer, Farhana; Pathan, Noman Khan; Memon, Zubair Ahmed

doi:10.14569/ijacsa.2018.090724

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…For instance, with an amplitude modulation index of 1.4, the THD values were observed to be 27.06% in the current waveform and 27.08% in the voltage waveform [21]. Similarly, investigations involving three modulation index values (0.6, 0.9, and 1) revealed that the minimum THD value for both current and voltage waves aligns with a modulation index value of 1 [24]. These results underscore the importance of the amplitude modulation index in controlling THD in MMCs and provide valuable insights for optimizing their performance.…”

Section: Introductionmentioning

confidence: 91%

“…Various control techniques are available for MMCs, with pulse width modulation (PWM) technology being one of the most prevalent choices. PWM technology is favored for its ability to regulate the voltages of sub-module (SM) capacitors, thereby ensuring the generation of high-quality output signals [24]. Among PWM-based control techniques, the amplitude modulation index emerges as a pivotal parameter.…”

Section: Introductionmentioning

confidence: 99%

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Analyzing Impacts of Amplitude Modulation Index on Performance Characteristics of Three-Phase Nine-Level Modular Multilevel Converters

Alhaj Omar,

Pamuk

2023

Electronics

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Modular multilevel converters (MMCs) represent the forefront of power converter technology, with wide-ranging applications across diverse industries. Over recent decades, substantial research and development efforts have been dedicated to enhancing MMCs’ performance. A significant challenge in power conversion processes is the presence of total harmonic distortion (THD) in output waveforms, which can have adverse effects on electrical equipment. In response, extensive studies have been conducted to address THD-related challenges by refining the control and operation of MMCs. This study investigates the effect of the amplitude modulation index (Ma) on the total harmonic distortion (THD) in nine-level MMC output waves. For this, a standard three-phase and nine-level MMC model was built and simulated in MATLAB/ Simulink environment, and the Ma value was shifted between 0.1 and 1.5. The output current and voltage waves were analyzed, and the optimal limits for the Ma values yielding the lowest THD values were determined. The simulation outcomes reveal a crucial Ma range between 0.6 and 1.2, where THD is significantly minimized. Ma values below 0.6 introduce significant harmonic distortion in the voltage waves, while values surpassing 1.2 lead to appreciable harmonic distortion in the current wave. This study contributes valuable insights for engineers and researchers and aids in the refinement of MMC control strategies and the mitigation of THD-related challenges in power systems.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Analyzing Impacts of Amplitude Modulation Index on Performance Characteristics of Three-Phase Nine-Level Modular Multilevel Converters

Alhaj Omar,

Pamuk

2023

Electronics

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“…To turn on these devices, proper triggering pulses are essential. The duration of these pulses depends on the switching frequency and its modulation index (MI) [2][3][4][5][6][7]. MI selection becomes important provided the switching frequency is constant.…”

Section: Introductionmentioning

confidence: 99%

Modulation index effect on inverter based induction motor drive

Sharma

Anandh

Gao

2020

IJPEDS

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Due to a substantial increase in the use of inverter for numerous electrical appliances starting from domestics to industrial drives, an inverter may be directly connected to the power grid system. The dependency on an inverter has been increased over the years. Hence, the proper and efficient design of the inverter will lead to higher efficiency. One of the major challenges is the generation of suitable gate pulses for power switching devices, which in turn depends on the modulation index. The selection of proper modulation index will help in the production of the rated voltage. If the modulation index is less, the duration of on-time pulses will be less and hence, the device's conduction time is also less, thereby the output voltage of the inverter is reduced. A reduced voltage, when applied to an induction motor will have lower speed and even its performance will be sluggish. The speed of the motor improves when it is operated in a closed-loop for the same modulation index. This research paper tries to bring out the effect of modulation index on speed control of an induction motor based on an inverter for both open as well as closed-loop operation. The simulated results indicate that the modulation index in the vicinity to unity will provide rated voltage for the smooth operation of the motor.

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“…The power quality of electrical signals must be good to transfer from the load function with proper waveforms, magnitudes, and distortions. Therefore, power quality is an extremely important aspect of distribution systems that enables all equipment to operate in healthy condition [10][11][12][13]. Equipment malfunctioning will occur when these conditions are unsatisfied.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Power Analyzer using Labview

Khan*,

Afridi,

Abbas

2020

IJITEE

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An important requirement of power systems in this decade is the capability of power distribution among electrical devices and systems to improve power quality that depends on various factors, such as reactive, active, and apparent power. Virtual experiments and testing are considered important factors to achieve the best performance in this area. This research mainly aims to find low power factors and load to meet the requirements of electrical devices. Calculations are conducted on a real-time simulator LabVIEW to verify the effectiveness of linear and nonlinear values on the load to achieve the power factor.

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Effects of Modulation Index on Harmonics of SP-PWM Inverter Supplying Universal Motor

Cited by 8 publications

References 15 publications

Analyzing Impacts of Amplitude Modulation Index on Performance Characteristics of Three-Phase Nine-Level Modular Multilevel Converters

Analyzing Impacts of Amplitude Modulation Index on Performance Characteristics of Three-Phase Nine-Level Modular Multilevel Converters

Modulation index effect on inverter based induction motor drive

Three-Phase Power Analyzer using Labview

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