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This paper presents a new technique to detect the junction temperature of Silicon Carbide (SiC) MOSFET devices. The process of detection is based on injecting a high frequency/low amplitude sweep signal into the gate lead of a SiC device during its OFF-state period. A frequency response analysis is carried out to determine the variation in the impedance which is a function of temperature change. The...
This paper proposes the development of a fully GaN HEMT based Active Neutral Point Clamped (ANPC) inverter. The main aim is to explore the benefits of the use of such device technology on the system level efficiency, power density and reliability. The paper starts by introducing the inverter topology and the device features, static and dynamic characterisation and continues with presenting and discussing...
The latest trend in solar inverter application is to increase DC link voltage to 1500VDC for high power output. This paper describes a design concept of NPC1 power stack for 1500VDC megawatt level solar inverter. This stack uses three latest half-bridge IGBT modules with highest power density and operation junction temperature, which enable realization of power level beyond 1MW without paralleling...
In this paper, an 1.2 kW thermoelectric generation system (TEG) for industrial waste heat energy recovery is developed and implemented. To achieve better performance, a novel hybrid maximum power point tracking (MPPT) method is also proposed. Comparing with conventional perturb and observe (P&O) technique and variable-step P&O method, the presented MPPT method can improve the tracking speed...
In-wheel motor is one of the expected electric vehicle technologies which has superiority in the vehicle control aspects. However, the integrated in-wheel motor in which the inverter is integrated with the motor makes thermal problems because of the reduction of cooling area. This paper analyses a cooling system of the inverter integrated in-wheel motor and considers the operating conditions of the...
In this paper, the feasibility of the simultaneous induction heating of the impeller and the vessel of the mixer. For basic investigation, the experiments of the double plates configuration is investigated. New equivalent coil measurement method is also shown. By using this method, the equivalent circuit of the induction heating system can be also easily estimated. The experimental results show the...
Bandgap voltage is typically used as the reference voltage of voltage regulators, such as dc-dc converters. Two high-precision CMOS bandgap reference circuits, labeled as current-mode and voltage-mode bandgap circuits, are proposed. The voltage-mode bandgap circuit can work with the supply voltage ranging from 2.5 V to 5V, while the current-mode bandgap works from 1.8 V to 5V. Both of them were designed...
In this paper, Li-ion battery charging method of On-Board Charger(OBC) for Electric Vehicle(EV) considering temperature is proposed. Considering the characteristics of the Li-ion battery that varies with temperature, it is a method for charging while maintaining the proper temperature. It operates in three modes and maintains the proper temperature of the battery via self-charge·discharge. In this...
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