Next Article in Journal
Modeling the Charging Behaviors for Electric Vehicles Based on Ternary Symmetric Kernel Density Estimation
Next Article in Special Issue
An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor
Previous Article in Journal
Application of Multivariate Statistical Methods and Artificial Neural Network for Facies Analysis from Well Logs Data: an Example of Miocene Deposits
Previous Article in Special Issue
Semi-Analytical Modeling and Analysis of Halbach Array
Open AccessArticle

± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System

1
Railroad Test & Certification Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea
2
Smart Electrical & Signaling Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea
3
Department of Railroad Electrical and Electronics Engineering, Korea National University of Transportation, Uiwang-si 16106
*
Author to whom correspondence should be addressed.
Energies 2020, 13(7), 1550; https://doi.org/10.3390/en13071550
Received: 26 February 2020 / Revised: 20 March 2020 / Accepted: 24 March 2020 / Published: 26 March 2020
(This article belongs to the Special Issue Design and Analysis of Electric Machines)
As high-capacity alternating current/direct current (ac/dc) power conversion systems, single-phase pulse-width modulation (PWM) converters used in high-speed railway propulsion systems adopt high-voltage Insulated-Gate Bipolar Transistors (IGBTs) as switching elements. Due to their high breakdown voltage characteristics, the switching dynamics are inferior to those of low-voltage IGBTs and switching losses are more dominant than conduction losses despite operating at relatively low switching frequencies of hundreds to several kHz. To solve this problem, this paper proposes ± 180° discontinuous PWM (DPWM) suitable for a single-phase circuit. With the simple addition of offset voltages, the proposed DPWM method can be implemented easily and switching losses can be reduced by half by clamping the switching legs of the H-bridge converter to the positive or negative dc rail during every half cycle. In addition, temperature deviation between the power stacks can be minimized by using selective application of clamping modes. The validity and effectiveness of the proposed DPWM are verified through simulations and experiments of a prototype converter. View Full-Text
Keywords: high-speed railway propulsion system; high-voltage IGBT; PWM converter; discontinuous PWM; switching loss high-speed railway propulsion system; high-voltage IGBT; PWM converter; discontinuous PWM; switching loss
Show Figures

Graphical abstract

MDPI and ACS Style

Song, M.-S.; Cho, I.-H.; Lee, J.-B. ± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System. Energies 2020, 13, 1550.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop