Improved Voltage of Cascaded Inverters Using Sine Quantization Progression

Sujanarko, Bambang; Ashari, Mochamad; Purnomo, Mauridhi Hery

doi:10.12928/telkomnika.v8i2.613

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…In some structures, the voltage source is divided into two equal parts, and the junction of these two sources, is connected to earth as a reference [5]. Although this type of inverter voltage leads to increased levels of output …”

Section: Structure Of Three-phase Invertersmentioning

confidence: 99%

Improving Output Voltage of the Three Phase Six-Switch Inverters

Babaei

Mahaei

2011

TELKOMNIKA

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Section: Structure Of Three-phase Invertersmentioning

confidence: 99%

Improving Output Voltage of the Three Phase Six-Switch Inverters

Babaei

Mahaei

2011

TELKOMNIKA

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“…To generate dynamic model in term qdn, a square matrix is required according to the phase number of induction motors [8]. The transformation matrix 9-phase system has been introduced to anticipate the development of equipment that is considered to produce large power and small dimensions [9] [13].…”

Section: Introductionmentioning

confidence: 99%

Nine-Phase Induction Motor Dynamic Model Based On 3x9 Transformation Matrix

2013

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Abstrak Kata kunci: Matrik qdn ordo 3x9, rangkaian ekuivalen trafo model T, model dinamik qdn Abstract Analysis of the dynamic model nine-phase induction motor becomes difficult because based on a 9x9 matrix and a circuit of magnetically coupled transformer. In order to gain the qdn dynamic model of the nine-phase induction motors in easy, simple, quick and consistent way, the motor analysis will based on 3x9 transformation matrix and the equivalent circuit T model. The 3x9 transformation matrix qdn is substituted into the equation in form abc so that the matrix equation of qdn is obtained. Then qdn equation results a similar qd equivalent circuit, which has different methods n that is, based the circuit of magnetically coupled transformer. Simulation results show that the dynamic characteristics of 9-phase induction motor based on the T model and magnetically coupled circuit have similar torque and speed dynamic response. Keywords: 3x9 matrik qdn, T model of motor equivalent circuit, qdn dynamic model IntroductionA dynamic model of qdn for induction motor is required to determine the characteristics of the starting conditions of motor until it gets steady state. All dynamic induction models of motor have been introduced by using the analysis based on the circuit of 1-phase transformer, which is magnetically coupled by stator and rotor frequency references [1]- [3]. A single-phase transformer circuit can easily be converted into T models of electrical circuit by primary/secondary reference because it has similar frequency. Mutual reactance of transformer under steady-state conditions is constant because all primary and secondary winding of the transformer are silent.However, an induction motor is very different from the transformer, the stator winding is stationary and the rotor winding is moving. In steady-state conditions, mutual reactance of the motor should have a function to manage rotation speed of the rotor which is then assumed to be constant to simplify the analysis. In addition, all of the parameters and frequency references refer to each part of the motor. While stator and rotor reactance are the leakage reactance as given in [4]. Thus, magnetically coupled circuits for 3-phase induction motor may not produce the equivalent circuit of the transformer T models [5]. Similarly, the equivalent circuit for the motor with higher phase becomes much more complex and may not be a T model of the equivalent circuit of the motor.

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“…For example, methods of cascaded multilevel inverter (CMLI), can improve power quality and a new DC voltage progression where the progression based on sine quantization method (SQM), which improve the amplitude of CMLI output voltage, this paper proposes to determine a sequence of DC voltages from discrete amplitudes of sine wave function. The method also collaborates with step equal residual area method (SERAM) to minimized total harmonics distortions (THD) [1]. And a simple method for selecting the best conductive angle based on power factor of load in three phase six-switch inverters is proposed.…”

Section: Introductionmentioning

confidence: 99%

“…To analyse the harmonics, application of the Fourier series is appropriate. Actually, Fourier series is a periodic function can be written as sums of infinitely many sine and cosine functions of different frequencies [1] …”

Section: Introductionmentioning

confidence: 99%