Space vector PWM control of dual inverter fed open-end winding induction motor drive

Abstract

scheme proposed here makes the individual inverter A space vector PWM technique is developed based switching frequency equal to half of the motor phase on the combination of space vectors from dual inverters switching frequency. %is results in low inverter switching feeding the induction motor from both ends (open-end with reduced power circuit complexity when compared to winding without neutral point). A total of 64 voltage space other multilevel inverters. vector combinations are available for PWM voltage control of the inverter fed machine with open-end winding. A space phasor based PWM scheme is proposed with minimum number of switching in a cycle per inverter coupled with equal number ofswitching for each inverter.[6]A.Rufer, M.Veenstra, K.Gopakumar,"Asymmetric multilevel converter for high resolution voltage phasor generation", EPE'99-Lausanne,pp.P 1 -P 10.1 9 9 7 ,~~ 1214-121 9. APPENDIX -AMotor oarameters:-SHP 3-ohase IM Rs = 2.08 ohms; M = 0.272 H; Ls = 0.28 H; J =0.11 Kg-m2; p = 4 Rr = 4,19 ohms; 0 = 0.0294; Lr = 0.28 H;

Single stage transformer isolated high frequency AC link based open end drive

“…When utilizing a DC-link based open end drive, the two pairs of motor terminals are fed by voltage source inverters(VSI). The space vector modulation technique for an open drive using dual VSI's has been described in [2]. A major advantage of the open end configuration is that it requires the use of only half the bus voltage to generate a given output voltage.…”

“…While this method is widely used, it causes unwanted bearing currents which lead to the eventual failure of the drive. Open end winding configuration of electric motors utilizing dual VSIs has been proposed which offers several advantages over the conventional single ended drive such as improved utilization of the DC bus and common mode voltage suppression [2], [3]. However, a major drawback of the DC link based VSI configuration is that the electrolytic capacitors used to construct the DC link tend to be bulky and degrade with time.…”

Random PWM Technique for Dual-Inverter-Fed Vector-Controlled Induction Motor Drive

“…1 called dual-inverter-fed open end winding induction motor drive. Based on application of input DC voltage to the inverters, dual inverter configuration is classified into symmetrical and asymmetrical dual inverter configurations (Shivakumar et al 2001;Baiju et al 2003a, b;Somasekhar et al 2007;Reddy et al 2013). With same number of switching devices, asymmetrical dual inverter configuration is capable of generating good quality of output voltage.…”

Flexible synchronized control of dual inverter-fed traction drive during overmodulation

“…Dual inverter-fed open-end winding motor drives have some advantages such as redundancy of the space-vector combinations and the absence of neutral point fluctuations [4]- [7]. These new drive topologies provide also the best possible use of different types of semiconductor switches.…”