The six-step voltage source inverter for induction motors

2011 ◽  
pp. 131-165
Keyword(s):  
Induction Motors ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Step Voltage

scholarly journals Analysis of Five Leg Voltage Source Inverter Fed Dual Motor Drive System

2021 ◽  
Vol 309 ◽  
pp. 01142
Author(s):  
S P Harish ◽  
S Sridhar ◽  
Omsekhar Indela ◽  
Kumaran G Kodeeswara ◽  
P. Parthiban
Keyword(s):  
Pulse Width Modulation ◽  
Induction Motors ◽  
Harmonic Distortion ◽  
Speed Control ◽  
Fault Analysis ◽  
Drive System ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Modulation Techniques ◽  
The Cost

With the advent of electric vehicle multi-machine drives are attaining overwhelming responses from the researchers and industries in recent years, as compared to their counterpart of single machine drive. In this regard, the industries are looking for multi motor control with single inverter system with precise speed control. The solution of aforesaid problem lies with multi-leg inverter fed dual induction motor drives that are capable for high power ratings and other specific applications. Any faults in the system leads to the failure of the operation of the entire drive system. Hence condition monitoring of the entire drive system becomes of paramount significance. Considering the aforementioned points, this paper focuses on the fault analysis of five leg voltage source inverter feeding dual induction motors. The drive system is simulated using MATLAB/ SIMULINK for different pulse width modulation techniques like SPWM, SVPWM and Two Arm Modulation (TAM) Techniques. The effect on fault in the inverter like opening of the switch and shorting the switch, on the performance of the induction motors are analysed. Total Harmonic Distortion (THD) of the stator current for different modulation techniques are compared for the analysis purpose. From the results it is observed that the THD is less for SVPWM techniques as compared with SPWM and TAM method. But independent control of both the machine cannot be attained by SPWM and SVPWM method. For independent speed control TAM method is used. So a trade-off has to be done considering the requirement and THD. It is finally concluded that independent speed control is achieved at the cost of higher THD.

scholarly journals Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors

2012 ◽  
Vol 22 (1) ◽  
pp. 107-120
Author(s):  
D. Beriber ◽  
A. Talha ◽  
M. Boucherit
Keyword(s):  
Stability Problem ◽  
Induction Motors ◽  
Power Converter ◽  
Neutral Point ◽  
Voltage Source ◽  
Switching Frequency ◽  
Voltage Source Inverter ◽  
Multilevel Inverters ◽  
Dc Bus ◽  
The Stability

Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors Voltage source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes of studying multilevel inverters are the generation of output voltage signals with low harmonic distortion and reduction of switching frequency. An important issue of the multilevel inverter is the capacitor voltage-balancing problem. The unbalance of different DC voltage sources of multilevel neutral point clamped (NPC) voltage source inverter (VSI) constitutes the major limitation for the use of this new power converter. In this paper, we present study on the stability problem of the input DC voltages of the three-level Neutral Point Clamping (NPC) voltage source inverter (VSI). This inverter is useful for application in high voltage and high power area. In the first part, we remind the model of double stator induction motors (DSIM). Then, we develop control models of this inverter using the connection functions of the semi-conductors. We propose a Pulse Width Modulation (PWM) strategy to control this converter. The inverter is fed by constant input DC voltages. In the last part, we study the stability problem of the input DC voltages of the inverter. A cascade constituted by two three-level PWM rectifiers - two three-level NPC VSI - DSIM is discussed. The results obtained show that the input DC voltages of the inverters are not stable. To solve this problem, we propose to use a half clamping bridge. This solution is very promising in order to stabilize the input DC voltages of this converters.

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