Title: Voltage lift technique-based quasi Z-source inverter for electric vehicle functioning

Authors: Jay Prakash Kumar Yadav; R.L. Josephine; Gollapinni Vaishnavi; M. Sai Harsha Naidu

Addresses: Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India ' Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India ' Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India ' Department of Electrical and Electronics Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India

Abstract: This paper deals with an inverter topology called voltage lift quasi Z-source inverter (VLQZSI), which has high implicit boost ability and is very much suitable for Electric vehicles (EVs) with fuel cells as an input energy source and 800 V motor as a driving motor. As it is a non-isolated single-stage topology, it eliminates the isolation transformer and the need for a separate DC-DC converter to adjust input voltage. The switching scheme implemented is a maximum constant boost pulse width modulation (MCB PWM). The advantage of using this scheme is that the required voltage boost can be obtained at very low duty cycle values, and hence, the modulation index will be higher, which leads to lower THD in the voltage at the output end of the DC-AC converter. The topology analysis and switching scheme are described, and the topology operation is shown through simulation results obtained from MATLAB.

Keywords: implicit boost ability; voltage lift cell; maximum constant boost pulse width modulation; shoot through state.

DOI: 10.1504/IJEHV.2024.137509

International Journal of Electric and Hybrid Vehicles, 2024 Vol.16 No.1, pp.1 - 15

Received: 28 Mar 2023
Accepted: 06 Nov 2023
Published online: 21 Mar 2024 *