International Journal of Power Electronics and Drive Systems (IJPEDS) Vol. 15, No. 3, September 2024, pp. 1331~1338 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v15.i3.pp1331-1338  1331 Journal homepage: http://ijpeds.iaescore.com Calculation of power losses in a frequency inverter Ayman Y. Al-Rawashdeh 1 , Mikhail Pavlovich Dunaev 2 , Khalaf Y. Alzyoud 1 , Sarfaroz U. Dovudov 2 1 Department of Electrical Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan 2 Department of mechatronics Engineering, Irkutsk National Research Technical University, Irkutsk Oblast, Russia Article Info ABSTRACT Article history: Received Jul 6, 2021 Revised Mar 20, 2024 Accepted Apr 3, 2024 This study's main goal is to make a new simulation model of the power losses calculation block for frequency converter power switches that can correctly figure out the transistors and diodes' static and dynamic power losses in a 1.5 kW SIEMENS SINAMICS G110 semiconductor converter (SSG110SC). We use simulation modeling tools in the MATLAB/Simulink environment to look at the semiconductor circuits of a rectifier and an autonomous pulse- width modulation voltage inverter. The study presents analytical expressions describing static and dynamic power losses in power semiconductor diodes and transistors. We used polynomials to get close to the power characteristics of insulated-gate bipolar transistor or IGBTs and then used mathematical expressions to show how they depend on Erec (Ic), Vse (Ic), Vf (If), Eon (Ic), and Eoff (Ic). By utilizing the acquired expressions, a MATLAB/Simulink block was constructed to calculate static and dynamic power losses. as well as power loss dependences on switching frequency and load current, were computed utilizing the developable block system. By comparing the simulation outcomes of the present study to the data provided by the manufacturer, the results were validated. Specific diode and transistor characteristics can be accounted for by the method developed in the present study. Keywords: Dynamic losses Efficiency Frequency converter Inverter Rectifier This is an open access article under the CC BY-SA license. Corresponding Author: Ayman Y. Al-Rawashdeh Department of Electrical Engineering, Faculty of Engineering Technology, Al-Balqa Applied University Amman, Jordan Email: dr.ayman.rawashdeh@bau.edu.jo 1. INTRODUCTION AC mains voltage with fixed magnitude and frequency can be converted into alternating voltage with controlled magnitude and frequency parameters using a DC-link-based frequency converter. Such a frequency converter is composed of an input uncontrolled rectifier with a smoothing filter (SF) at its output and an autonomous voltage inverter (AVI) that applies the pulse width modulation (PWM) technique [1]–[7], built using IGBT modules [8]–[14]. One prevalent application of this category is the SSG110FC converter. The power circuit of SSG110FC is shown in Figure 1. Figure 1 is powered by alternating current mains with 220 V and 50 Hz as voltage (Uc) and frequency (Fc), respectively. A bridge rectifier (BR) with diodes VD7–VD10 and no control is made up of them. A smoothing filter (SF) with capacitor C is also present. There is also a 3-phase bridge AVI with six IGBTs (VT1–VT6) and diodes (VD1–VD6) connected across the IGBTs in an antiparallel way. AC diagonally connected to the inverter load (Rn, Ln) of the AVI. The rectifier is made up of diodes, and the AVI modules consist of IGBTs with free-wheeling diodes. A considerable amount of loss occurring in the converter (FC) takes place in the rectifier. It should be noted that the current study does not address the losses that occur in the filter capacitor, cooling, and control systems. In high-power FCs, losses arising in the uncontrolled rectifier and autonomous voltage inverter may be critical [15], [16]. The current investigation deals with studying power