Fault Diagnosis of ZSI-Fed 3-Phase Induction Motor Drive System Using MATLAB
This paper presents the simulation analysis of Z-source inverter-fed induction motor drive system for three-phase operation. Incorporating Z-source inverter enables both buck as well as boost operation. A study of the proposed system is performed under va
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Abstract This paper presents the simulation analysis of Z-source inverter-fed induction motor drive system for three-phase operation. Incorporating Z-source inverter enables both buck as well as boost operation. A study of the proposed system is performed under various fault conditions viz. fault at one of the gate terminal of MOSFET, MOSFET blown off fault, and line-to-ground fault which primarily occurs in any drive system. The output voltage and current waveforms with relevant FFT spectrum are presented.
Keywords Boost Buck FFT spectrum Total harmonic distortion (THD) FFT
1 Introduction In every application of electrical drives, voltage-fed and current-fed inverters are implemented. But conventional inverters show inherent drawbacks of only one feature of either step up or step-down. This property is due to the gating problem of the respective phases of inverters. This feature has questioned the reliability of conventional inverters and hence an alternative finds its application in the emerging field of drive applications. The disadvantage of EMI or radio interference is also to be eliminated for a pure sine wave output of inverters. Hence, Z-source inverters find their applications for this purpose-source inverters employs LC network in a cross fashion which in turn provides buck or boost output at a desired frequency. The schematic diagram of the proposed system is shown in Fig. 1. It consists of an input DC source which is fed to an LC network and ripple-free DC is then given to
Vivek Sharma (&) Pulkit Garg Department of Electrical & Electronics Engineering, Graphic Era University, Dehradun, India e-mail: [email protected] Pulkit Garg e-mail: [email protected] © Springer Science+Business Media Singapore 2016 M. Pant et al. (eds.), Proceedings of Fifth International Conference on Soft Computing for Problem Solving, Advances in Intelligent Systems and Computing 437, DOI 10.1007/978-981-10-0451-3_19
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Vivek Sharma and Pulkit Garg
Fig. 1 Schematic diagram of proposed system
three-phase inverter. The inverter provides sinusoidal waveform which is given to the three-phase induction motor load [1]. The proposed scheme inhibits MOSFETs as switching gate circuits for inverter module. The study of fault will be incorporated on the given proposed system as conventional inverters provide AC voltage lower than input voltage. For higher voltage with limited DC voltage applications, implementation of DC-DC boost converter is essential [2]. This in turn increases circuit cost and lowers efficiency. To obtain ripple-free output, an additional LC filter is required in the voltage-source inverter. This increases the cost and complexity of the circuit. In current source inverters, distortions are present since for safe current operation overlap time is needed. Due to interference issues, the reliability of inverters is questionable. The Z-source inverter arrangement consists an LC network with split inductor and capacitors connected in X shape to provide impedance source coupling. The Z-source conc
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