Modeling of Conduction and Switching Losses for IGBT and FWD Based on SVPWM in Automobile Electric Drives

Abstract

<jats:p>The modeling of conduction and switching losses for insulated gate bipolar transistors (IGBTs) and free-wheeling diodes (FWDs) in automobile applications is becoming increasingly important, especially for the improvement of the system efficiency and the reliability prediction. The traditional modeling of conduction and switching losses based on the space vector pulse width modulation (SVPWM) is not applicable in practice due to the complex curve-fitting and the computation demands. In this paper, a simple and practical losses model for IGBTs and FWDs is proposed based on the SVPWM algorithm. Firstly, the traditional power losses model is introduced briefly. Then, the piecewise linear switching losses model and the conduction losses model based on the equivalent three-order harmonic model of the duty cycle are proposed. The comparison of experimental results between the traditional model and the proposed model is presented in the experiment validation. Furthermore, the power analyzer is adopted to measure the inverter losses, and the chips losses are further validated when other extra losses are considered. The proposed model shows good modeling accuracy with the large benefit of smaller measurement and lower computation requirements.</jats:p>

Switching‐angle‐based hybrid modulation method of full wind speed and low carrier wave ratio for direct‐drive permanent‐magnet wind power generation system

“…Equation (24) expresses the relationship between the flux linkage and the voltage in the three-phase stationary coordinate system. When the influence of the stator resistance is ignored, the relationship between the flux linkage vector and the voltage vector of the PMSG in the ABC coordinate system is:…”

“…Synchronous SVPWM modulation is based on space vector synthesis, which has the advantages of easy digital implementation and better harmonic performance. In references [21][22][23][24], the modulation principle of the synchronous SVPWM modulation strategy at different frequency divisions is described in detail. The carrier wave ratio of the synchronous SVPWM modulation strategy is a fixed value.…”

“…Existing synchronous modulation can be divided into two categories: (1) optimized synchronous modulation, such as specific harmonic elimination [9][10][11], current harmonic minimum pulse width modulation [12][13][14][15], synchronous optimal pulse width modulation [16][17][18], and so on; (2) non-optimized synchronous modulation, such as intermediate 60 • modulation [19,20], synchronous Space vector pulse width modulation (SVPWM) modulation [21][22][23][24], and so on. The optimized synchronous modulation is mainly to establish a transcendental equation with switching angle as a variable by reducing specific low-order harmonics, then optimize and solve the equation to obtain the switching angle, but an online solution is difficult and not easy to implement digitally.…”

The Influence of Soldering Profile on the Thermal Parameters of Insulated Gate Bipolar Transistors (IGBTs)

“…They are commonly used in switch-mode power converters [4]. Their applications include wind turbines, aircraft, and electric vehicles [5,6]. Choi et al analyzed the main failure mechanism of IGBT modules.…”

Optimization of TSPWM for Common-Mode Voltage Reduction in Vehicular Electric Drive System

“…The conventional space vector pulse width modulation (SVPWM) has been widely applied to the vehicular electric drive system, as it performs well in terms of voltage linearity, current harmonics, and system efficiency [1,2]. However, since the introduction of the zero vectors of 000 and 111, the corresponding amplitude of the common-mode voltage (CMV) is equal to V dc /2 (the DC bus voltage) [3].…”