In this paper, a multilevel inverter system for an open-end winding induction motor drive is described. Multilevel inversion achieved by feeding with two two-level inverters in cascade (equivalent to three-level inverter) from one end and single the other of motor. The combined produces voltage space-vector locations identical six-level inverter. A total 512 combinations are available proposed scheme, distributed over 91 locations. scheme capable producing pulsewidth-modulation (PWM)...

For hybrid electric vehicles, the batteries and drive dc link may be at different voltages. The are low voltage to obtain higher volumetric efficiencies, is have efficiency on motor side. Therefore, a power interface between drive's essential. This should handle flow from battery motor, battery, external genset grid battery. paper proposes multi-power-port topology which capable of handling multiple sources still maintains simplicity features like obtaining high gain, wide load variations,...

This paper proposes a new 7-level inverter topology for induction motor drives. It is hybrid formed by cascading 5-level active neutral-point-clamped with 3-level T-type converter. obtained using low-voltage semiconductor devices voltage blocking capability of Vdc/3 and Vdc/6. The uses three floating capacitors per phase, which are balanced within pulsewidth modulation (PWM) switching duration switching-state redundancies each pole-voltage level. Topology forms two stacks at the front-end,...

The tracking of power in solar PV systems depends on controlling the voltage or current to optimum level irrespective changes irradiation. There are two aspects maximum point (MPPT), first is control and second find peak with an algorithm. This work deals both aspects, using which provides fast response a momentum-based MPPT algorithm for improved tracking. Since programmed gives simple implementation converters, it would seem obvious link referenced but this method prone fail when...

In this paper, a harmonic elimination and suppression scheme for dual-inverter-fed open-end winding induction motor drive is presented. Two isolated dc-link sources with voltage ratio of approximately 1 : 0.366 are required the present drive. These two do links feeding inverters to eliminate triplen currents from phase. The pulsewidth-modulation proposed enables cancellation all 5th- 7th-order (6n /spl plusmn/ 1, where n = 3, 5, 7, etc.) voltages suppresses 11th- 13th-order amplitudes in...

This paper presents a 5-level inverter topology for open-end induction motor drives by using single dc source. The open stator windings of the drive are supplied with 3-level flying capacitor from one end and capacitor-fed 2-level another end. voltage ratio link to in is maintained at 4:1 generate five-level output. balanced switching redundant vector combinations both inverters while floating capacitors states. proposed gives operation less number power semiconductor switches compared other...

This paper presents a reduced component count five-level inverter topology based on the stacked cell approach to multilevel inverters. The proposed utilizes fundamental properties of three-phase voltages reduce number switches and flying capacitors cut size, weight costs while facilitating higher reliability, simpler wiring lesser electromagnetic interference. operational aspects such as circuit structure, modulation capacitor balancing are explained, followed by an account device stresses...

This article introduces a hybrid nine-level inverter topology with extended dc-bus utilization for operation at over modulation range without the presence of lower order harmonics (predominantly fifth and seventh) when compared to conventional two-level multilevel hexagonal voltage space vector structure. The proposed is cascade fivelevel T-type unit an H-bridge (HB) unit. An increase in possible by increasing pole levels ±(V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

An open-end winding induction motor drive fed from two inverters with different DC link voltages is proposed in this paper. A total of 64 voltage space phasor combinations are possible scheme as each inverter produces 8 phasors. The locations more than that a 3-level inverter. 37 the compared to 18 In scheme, neutral connection separated (open-end winding) and both ends. Two 2-level 2/3 VDC 1/3 used for driving motor. Here conventional identical power. combination DC-link will produce...

This paper proposes a novel method for instantaneous balancing of neutral-point (NP) voltages with stacked multilevel inverters (MLIs) variable-speed drives. The MLI uses series-connected dc sources and NPs (connecting points sources) to obtain the desired levels. NP are obtained by using low-voltage-capacitor-fed cascaded H-bridge (CHB) per phase symmetrical six-phase induction machine (IM), which ensures zero current drawn from (at any given instant). Since no is NPs, single dc-link...

This article proposes a fault-tolerant five-level inverter scheme for open-end induction motor (OEIM) drive application using single dc link. The is fed with primary (a two-level cascaded capacitor-fed H-bridge inverter) from one end and secondary (capacitor-fed the other end. ratio of dc-link voltage to nominal capacitor in maintained at 4:2:1. balancing proposed achieved by space-vector (SV) redundancy. gives operation less number components compared existing topologies. Furthermore,...

A topology for voltage-space phasor generation equivalent to a five-level inverter an open-end winding induction motor is presented. The fed from both ends by two three-level inverters. inverters are realised cascading two-level This scheme does not experience neutral-point fluctuations. Of the only one will be switching at any instant in lower speed ranges. In multilevel carrier-based SPWM used proposed drive, progressive discrete DC bias depending on range given reference wave reduce...

A new type of multi-port isolated bidirectional DC–DC converter is proposed in this study. In the converter, transfer power takes place through addition magnetomotive forces generated by multiple windings on a common transformer core. This eliminates need for centralised storage capacitor to interface all ports. Hence, requirement an additional stage from can also be eliminated. The used multi-input, multi-output (MIMO) system. pulse width modulation (PWM) strategy controlling simultaneous...

This paper presents a method for generating multilevel dodecagonal voltage space vector structure using single dc source induction motor drives. Multilevel combines the advantages of both and structures, hence, generates low dv/dt phase along with elimination fifth- seventh-order harmonics over entire modulation range. eliminates low-order harmonic currents prevents generation sixth-order torque ripple in motor. The topology used requires only one making four-quadrant operation drive system...

Accurate estimation of electrical parameters voltage-source-inverter-fed induction machine (IM) drives is very important while employing high-dynamic-performance control schemes, such as vector control. Parameter schemes reported in the literature can estimate only four ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$R_s$</tex-math></inline-formula> , notation="LaTeX">$L_{ss}$</tex-math></inline-formula>...