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This paper presents the possibility to use the MOS-FET as the current measuring resistance. The shunt resistance is often used to measure the current in power electronics circuit since it is low cost and high reliable. However the reduction of components is always desirable for reduction of the cost and high reliability. Maximum power point tracking is indispensable for the renewable energy source,...
This paper investigates advantages of new double converter system with the induction generator for wind power generation. The PFC converter and the voltage source converter are used. The voltage source converter controls the exciting voltage and frequency to generate the maximum power of the induction generator. The voltage source converter supplies the reactive power only. All real power from the...
Linear Induction Motor (LIM) has many applications. The maglev transportation system is the most popular application. The typical maglev transportation system has the traction system and levitation system separately. The LIM is used for the traction system. The levitation magnets are implemented as the levitation system. We have developed a novel maglev system using the LIM without the levitation...
In this paper, experiments using a miniature motor and a chopper circuit for students are shown. These experiments are aimed to introduce the basic principle and characteristics of the motor and some control method to the sophomore (second grade) students. They learn not only the principles but also knowhow of construction of experimental setup and measurement.
This paper investigated the reactive power increase when the cage rotor induction machine is connected to the utility system through the full rating VSC link system. The calculation using equivalent circuit indicates that the increase in the reactive power consumption may be suppressed by the decrease in the reactive power consumption of the secondary circuit. The combination of the cage rotor induction...
This paper investigates advantages of new combination of the induction generator for wind power and the power electronic equipments. Induction generator is popularly used for the wind power generation. The disadvantage of it is impossible to generate power at the lower rotor speed than the synchronous speed. To compensate this disadvantage, expensive synchronous generator with the permanent magnets...
This paper presents the performance of connecting two wind generation systems with the energy storage at the DC side. Energy storage is desirable to be installed to keep constant output from the wind power generation system. The DC connection of two wind power generation system helps to exchange power between the two systems and can suppress the disturbance of the output power to the utility systems...
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