Three-Phase Space Vector Modulated Z-Source Inverter
The simulation model and the control scheme of a three-phase space vector modulated (SVPWM) Z-source inverter (ZSI) is discussed in presented article. The result waveforms are exposed in the MATLAB-Simulink scope platform. This new topology of inverter is
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Abstract The simulation model and the control scheme of a three-phase space vector modulated (SVPWM) Z-source inverter (ZSI) is discussed in presented article. The result waveforms are exposed in the MATLAB-Simulink scope platform. This new topology of inverter is explored to defeat the all limited constraints of old VSI and CSI models. The output parameters of ZSI are controllable and adjust by the duty cycle of the switches used at the main bridge along with a primary switch at the source side. This variation in duty cycle is accomplished by SVPWM approach. Likewise the shoot-through state is worth in ZSI model. Keywords Voltage-source inverter · Current-source inverter · Impedance-source inverter (ZSI) · Space vector pulse width modulation
1 Introduction With technological advancements, semiconductor switches have become popular in control strategies. An inverter changes over DC to AC current [1]. Traditional voltageor current-source converters are not buck–boost converter. They can be either buck converter or boost converter. Conventional voltage-source inverter is a DC-to-AC buck converter; i.e., the output AC signal is lower than the input DC signal. An extensive capacitor is connected between the DC input source voltages to maintain effectively the three-phase inverter output. Besides, an ordinary CSI is a DC-to-AC S. Kumari (B) Electrical & Electronics Engineering Department, Darbhanga College of Engineering, Darbhanga, India e-mail: [email protected] R. K. Mandal · G. K. Choudhary Electrical Engineering Department, National Institute of Technology, Patna, India e-mail: [email protected] G. K. Choudhary e-mail: [email protected] © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 V. Nath and J. K. Mandal (eds.), Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems, Lecture Notes in Electrical Engineering 673, https://doi.org/10.1007/978-981-15-5546-6_15
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Fig. 1 Three-phase VSI model
boost converter. In comparison with the DC voltage provided to the bulky inductor circuit, the output AC voltage of CSI is better (Fig. 1). The VSI has these limitations: 1. As the AC voltage signal cannot be superior than the input voltage (DC), the VSI behaves as a step-down inverter. Vice versa, it behaves a step-up converter. An extra boost chopper (DC–DC converter) is essential for those applications where the input dc voltage magnitude is constrained. [2]. 2. For getting sinusoidal output, an additional LC channel is required. Due to this, the device gets bulky and complicated, resulting in more power losses. 3. To avoid the STS, which can happen due to electromagnetic interference, a dead time needs to be provided in both the top and bottom wings of the power switches. This leads to distortion in the output waveform. The traditional CSI model is presented in Fig. 2. The input of the three-phase inverter circuit is a DC current source. The circuit comprises of six power sem
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