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This paper investigates the solid state transformer applied for the HVDC transmission from the offshore windfarm. The 5kVA experimental setup is developed and comparison of 50Hz, 400Hz and 1000Hz operation. Dependency of the loss in the transformer with different core materials to frequency is investigated. Frequency loss dependency of several core materials are compared with experimental measurement...
In the utility system, the most popular fault is 1 line-to-ground fault. It causes the imbalance voltages and currents in 3-phase power system. This paper presents the novel unbalanced fault detection by using the very fast real time symmetrical coordinate transform from the memorized 3-phase voltage data before 1 sampling time. This paper presents some characteristics of the very fast real time symmetrical...
This work is focused upon power electronic motor-driven scooter with a new EDLC (Electric Double Layer Capacitor) on board charger. This electric scooter is eco-friendly and high performances. In addition, it is effective method suitable for global environmental issues and energy concerned problems. This paper mainly deals with an EDLC based-electric scooter and its unique super-rapid pulse charging...
This paper deals with attractive voltage-source single-ended sub-resonant high-frequency (HF) inverter as a simple wireless power transfer (WPT) based on unidirectional inductive power transfer (IPT) in addition to bidirectional HF converter as transmitter and receiver of WPT is developed for vehicle to home (V2H) smart energy management architecture. Firstly, the voltage source single-ended sub-resonant...
This paper deals with a cost effective wireless EV battery charger which integrates the simplest quasi-resonant soft switching pulse modulated inverter with a newly developed SiC-MOSFET. In the first place, the operating principle of a wireless EV charger using a class-E single-ended inverter which is cost-effective for affordable price and simple is described. This type of wireless resonant EV charger...
Offshore wind farms are growing as a renewable generation system. For long distance power transmission from offshore to mainland, a high voltage direct current (HVDC) system is cost-effective. This paper shows a new modulation technique for the voltage source converter (VSC) of a HVDC output offshore wind farm. It is called a modified trapezoidal modulation (MTM). This technique can greatly reduce...
In this study, we focused on an electric motorcycle system with onboard innovative charger using ultracapacitor (EDLC). The electric two-wheel scooter is an excellent performance and environmentally friendly. Moreover, it's just an effectual solution suitable for energy resource issues and the global environment. This paper discusses with the electric motorcycle using EDLC and an innovative pulse...
To have more effective fault ride through operation for the power conditioner of the photovoltaic system, the detection of the imbalanced condition is important factor. In this paper, new detection method by using the complex number algebra in real time control system is shown. Very fast detection of the imbalanced condition is verified by simulations and experiments.
A hybrid switch configured by silicon insulated gate bipolar transistor (Si IGBT) and silicon carbide metal-oxide semiconductor field effect transistor (SiC MOSFET) have been investigated to be a cost effectiveness and high efficiency. In this paper, we aimed reducing the hybrid switch loss and expanding operation area of frequency and current. We measured dependency on various parameters to analyze...
In this paper, a maglev transportation system with a Linear Induction Motor (LIM) is introduced. It is proposed that two different frequency components are used to achieve the simultaneous and independent control of the thrust and attractive force of LIM. One of the frequency components is synchronous with the motor speed (fm). The other frequency is drive frequency (fd) that generates the thrust...
In this paper, the fast heating up impeller and container directly by induction heating is proposed. Simultaneous heating of the impeller and the container leads to the homogeneous and rapid heating for the chemical reaction. To show the feasibility of proposed method, the induction heating of the double layer of the stainless steel plates are investigated. Experimental results show the good feasibility...
In this paper, it is proposed to use a matrix converter for linear induction motor (LIM) drives. A matrix converter is a direct AC-AC converter. It has the potential to regenerate power and to connect directly across the AC power line, thus it is possible to improve the efficiency in the entire system of LIMs drive. In this experiments, the operating characteristics of the matrix converter were examined...
This paper deals with attractive voltage-source single-ended sub-resonant HF inverter as a simple wireless power transfer (WPT) based on unidirectional IPT in addition to Dual Active HF inverter and HF rectifier as transmitter and receiver of WPT is developed for bidirectional EV2H smart energy management architecture. Firstly, the voltage source single-ended sub-resonant HF inverter using a single...
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...
This paper deals with attractive voltage-source single-ended sub-resonant HF inverter as a simple wireless power transfer (WPT) based on unidirectional IPT in addition to Dual Active HF inverter and HF rectifier as transmitter and receiver of WPT is developed for bidirectional EV2H smart energy management architecture. Firstly, the voltage source single-ended sub-resonant HF inverter using a single...
In recent years, as an eco-friendly EV charging system, the wireless charging has become a topic due to the merits such as convenient, safety, and clean. In this paper, in order to realize a large-gap wireless charger which can communicate between the power feeding and receiving units without any additional communication device, a wireless power transfer (WPT) system using a single-ended push-pull...
This work is focused upon power electronic motor-driven scooter and its related new EDLC (Electric Double Layer Capacitor) charger. The electric scooters are eco-friendly, high performances and more convenient. In addition, it is effective method suitable for global environmental issues and energy concerned problems. This report mainly deals with an EDLC based-electric scooter and a unique pulse super-rapid...
This paper is mainly about the efficiency and leakage magnetic field of five types of power transfer coils with different structures in a magnetic resonant WPT system with a single-ended inverter. Five pairs of square coils have been formed, so as to compare the efficiency and magnetic field reducing effects by simulation.
In the chemical industry, the mixer or agitator is widely used. To mix the liquid of high viscosity and promote the chemical reaction, heating up the liquid till the proper temperature for the reaction is popular method. Usually the heater is set at outside of the outer vessel. Then getting homogeneous temperature inside the liquid takes long time. The longer the inhomogeneous time is, the larger...
The smart house system offer promise as an effective solution to environmental problems. An obstacle to diffusion of the smart house is the high cost of battery. An effective solution to this problem is vehicle to home (V2H) system. EVs can be used in smart house systems to supplement the energy storage. This system essentially requires a bidirectional power transfer feature between the EV and home...
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