An Effective Control Technique for Medium-Voltage High-Power Induction Motor Fed by Cascaded Neutral-Point-Clamped Inverter

2010 ◽  
Vol 57 (8) ◽  
pp. 2659-2668 ◽  
Author(s):  
Baoming Ge ◽  
Fang Zheng Peng ◽  
A T de Almeida ◽  
H Abu-Rub
Keyword(s):  
Induction Motor ◽  
High Power ◽  
Neutral Point ◽  
Control Technique ◽  
Effective Control ◽  
Medium Voltage

scholarly journals Phase-Shifting Transformer Combined with the Novel SHEPWM for Harmonics Reduction in Medium-Voltage Inductive Loads

2019 ◽  
Vol 8 (2S9) ◽  
pp. 409-413
Keyword(s):  
Induction Motor ◽  
High Power ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Phase Shifting ◽  
Control Technique ◽  
Switching Frequency ◽  
Medium Voltage ◽  
The Impact ◽  
Low Order

In this paper, a novel approach is proposed to reduce the impact of harmonics in the high-power medium-voltage squirrel-cage induction motor. An inverter with a minimum switching frequency is required for this load type to reduce the snubber and switching losses. Phase-shifting transformer is selected as an interface between the three-phase supply and the inverter. This is to reduce the impact of low order harmonics and consequently reducing total harmonic distortion (THD). Selective harmonic-elimination pulse width modulation (SHEPWM) is employed as a control technique in the inverter to eliminate specific low-order harmonics. Thereby, many low order harmonics are reduced further. By this way the THD of the system is reduced significantly and consequently the better and cleaner energy is obtained. In this research, PSpice simulation verified by MATLAB is used to estimate the harmonics content of the currents in high-power medium voltage induction motor.

scholarly journals Multilevel neutral point clamped/H-bridge inverters with sinusoidal pulse width modulation

2021 ◽  
Author(s):  
Arifur Rahman Shohel
Keyword(s):  
Computer Simulation ◽  
Theoretical Analysis ◽  
High Power ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Neutral Point ◽  
Medium Voltage ◽  
Modulation Technique ◽  
Sinusoidal Pulse Width Modulation

This project focuses on the topology of multilevel neutral point clamped (NPC)/H-bridge inverters and their modified modulation technique for high-power (megawatts) medium voltage (typically 6000 v) applications. A sinusodial pulse width in-phase disposition modulation is proposed for five-level NPC/H-bridge inverters. The inverter achieves good harmonic performance and low dv/dt in its output voltage waveforms in comparison to the conventional three-level NPC inverter. A seven-level NPC/H-bridge topology and its sinusodial pulse width in-phase disposition modulation are also proposed and investigated, which has better performance than the five-level inverters. Theoretical analysis and computer simulation are carried out for the proposed inverter topologies and algorithms. The output voltage waveforms and harmonic performance are verified by experiments on a five-level NPC/H-bridge inverters.

scholarly journals Direct Torque Control for Three-Level Neutral Point Clamped Inverter-Fed Induction Motor Drive

2012 ◽  
Vol 2 (2) ◽  
pp. 201-208 ◽  
Author(s):  
M. K. Sahu ◽  
A. K. Panda ◽  
B. P. Panigrahi
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Neutral Point ◽  
Torque Control ◽  
Control Technique ◽  
Motor Drive ◽  
Switching Frequency ◽  
Induction Motor Drive ◽  
Space Vector

Direct torque control (DTC) is a control technique in AC drive systems to obtain high performance torque control. The classical DTC drive contains a pair of hysteresis comparators and suffers from variable switching frequency and high torque ripple. These problems can be solved by using space vector depending on the reference torque and flux. In this paper the space vector modulation technique is applied to the three-level Neutral Point Clamped (NPC) inverter control in the proposed DTC-based induction motor drive system, resulting to a significant reduce of torque ripple. Three-level neutral point clamped inverters have been widely used in medium voltage applications. This type of inverters have several advantages over standard two-level VSI, such as greater number of levels in the output voltage waveforms, less harmonic distortion in voltage and current waveforms and lower switching frequencies. This paper emphasizes the derivation of switching states using the Space Vector Pulse Width Modulation (SVPWM) technique. The control scheme is implemented using Matlab/Simulink. Experimental results using dSPACE validate the steady-state and the dynamic performance of the proposed control strategy.

scholarly journals Sliding mode control technique for an induction motor drive supplied by a three-level voltage source inverter

2008 ◽  
Vol 21 (2) ◽  
pp. 195-207 ◽  
Author(s):  
Sergey Ryvkin ◽  
Richard Schmidt-Obermöller ◽  
Andreas Steimel
Keyword(s):  
Induction Motor ◽  
High Power ◽  
Sliding Mode ◽  
Design Procedure ◽  
Control Technique ◽  
Voltage Source ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Voltage Source Inverter ◽  
Simulation Results

The possibility of using sliding-mode (SM) technique for an induction motor drive with a class of inverters dedicated to high power, the three-level voltage-source inverter (3LVSI), has been presented. A designed control based on the proposed two-step design procedure is discussed; drive simulation results are shown. .

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