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Compared with the silicon semiconductors, silicon carbide (SiC) metal-oxide-semiconductor Field-Efïect transistor (MOSFET) can operate at higher switching frequency and higher temperature, which makes the junction temperature estimation more significant and challenging. In this paper, different thermo- sensitive electrical parameters (TSEPs) are investigated about their potential to measure the junction...
The layout of power modules is one of the key points in power module design, especially for high power densities, where couplings are increased. In this paper, along with the design example, a fast and universal layout design method for both wirebond and planar power modules is presented. Some practical considerations and implementations are introduced in the optimization of module layout design.
This paper introduces vector control of six-phase PMSMs with selective harmonic elimination PWM (SHEPWM) technology. Mathematic model of six-phase PMSM is given. Then relation between harmonic currents and voltages is derived. Harmonic current responses of salient pole six-phase PMSMs and non-salient pole six-phase PMSMs are different by applying the same harmonic voltage excitation. Besides, the...
Conventional 2 in 1 IGBT package with 62mm×150 mm suffers from imbalance of current distribution and switching loss due to the different effect of internal electromagnetic field on multiple IGBT chips connected in parallel. A novel DBC (Direct Bonding Copper) layout was proposed in this paper to reduce the parasitics and the electromagnetic coupling between control loop and main current path. And...
Since selective harmonic elimination PWM (SHEPWM) was proposed, the calculation of switching-angle curves has been a hot research point. Up to now, many approaches have been applied and multiple solutions of SHE equations have been obtained. Multiple sets of switching-angle curves provide SHEPWM strategies, which are often adopted in the control system of induction machines for railway driving, more...
To keep stray inductance low is a basic requirement in package design of IGBT modules. Meanwhile, paralleling of several switches is unavoidable in modern power electronics to insure always increasing current levels. Current balance between paralleled chips is another concern. In this paper, a simple power module, several different types of IGBT chips are respectively associated to reach the classical...
Selected harmonics elimination PWM (SHEPWM) strategy adopted in railway driving system promises to have better performance than other PWM strategies, such as SVPWM and SPWM. However, since SHEPWM was proposed, the calculation of switching-angle curves has been a hot research point. Up to now, many approaches have been applied and multiple solutions of SHE equations have been obtained. This paper presents...
Parasitics are a major concern in design of IGBT gate driver with both high switching speed and high power handling requirements. This paper presents the parasitics influence on the static and dynamic performance. It is shown that the dominant parasitic inside the module and driver circuit. They cause voltage spike or unbalanced transient current between paralleled IGBTs.
IGBT is one of the key components of motor driving system for electric vehicles, and its reliability directly affects the reliability of the electric vehicles. The reliability of the IGBT is affected by the loss and the junction temperature in working condition. To predict the IGBTpsilas loss and thermal response, especially in the case of adverse dynamic conditions, the dynamic loss model and the...
This paper proposes the digital charge control method to boost converter operating with a type of nonlinear load, the constant power load. The constant power load is modeled theoretically, and model parameters are given in detail. Transfer functions of the boost converter with constant power load are deduced, and a small-signal model of the charge controlled current inner loop is presented. The digital...
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