Koichi Shigematsu

A trial production of small size ultra-high speed drive system

Developments of power electronics technology, low-loss iron core materials and highly efficient permanent magnets, etc. have made it possible to realize a small size, high or ultra-high speed, and high performance electrical drive system. Such a drive is expected for various kinds of applications such as co-generation system, electrical vehicle and compressor, in which small size, light weight and high efficiency are required. For these applications, we designed and built a trial ultra-high speed drive system of 2 poles, 5 kW, 240000 rpm. In this paper we describe our prototype system and show some experimental results. The computer simulation was used to evaluate the fundamental motor characteristics at the first design stage and total systematic approach to enhance the total drive system.

The automotive system simulation by using multi domain modeling technique

The goal of this research is how to realize automotive system simulation by using multi domain simulation technologies. This paper illustrates how to utilize the multi domain simulation model for creating and validating the automotive system simulation. This technique is verified by simulations and experiments.

Investigation into standard parameters of motor drive systems

This paper provides a standard motor model, parameters, and a design of controllers for simulation of motor drive systems. In the motor drives working group of Investigating R&D Committee on applied simulation for power electronics systems in IEEJ, standard models for simulation of motor drive systems have been discussed. Parameters of more than 330 motors have been gathered from among released data sheets and specifications from manufacturers, IEEE transactions, IEEJ papers, and JIPE papers. Tendency of the parameters have been also investigated. A simulation example based on the investigation of dc motors is shown and the validity is demonstrated.

The system simulation for small size and ultra-high speed motor drive system using coupled analysis

A trial small size and ultra-high speed motor drive system of 5kW and 240,000rpm is designed and built. And we had described our prototype drive system and some experimental results in previous papers. For evaluating the motor drive system, we also are working on an electric and magnetic coupled-analysis in which we use not only the motor model from FEM but also the drive and control system models in the circuit simulation. This paper describes how total motor drive systems are modeled by using the coupled analysis to represent for entire system simulation. The simulation results are verified in comparison with the experimental results.

Model development for motor drive system simulations

In the motor drives working group of Cooperative Study Group on Applications of Power Electronics Simulations of IEEJ, standard models for simulation of motor drive systems are discussed. This paper provides a standard motor model of induction motor drive systems with parameters. Parameters of more than 30 induction motors have been gathered, and tendency of the parameters have been also investigated. In this paper, some simulation example are shown and compared with the experimental results.

Practical simulation examples of automotive and power supply systems

In the Automotive Working Group and Power Supply Working Group of Cooperative Study Group on Standard Development for power electronics systems in IEEJ, practical simulation examples of Automotive and Power Supply Systems have been discussed. This paper provides the practical simulation examples for the inexperienced engineers of automotive and power electronics, in order to easily understand the practical operation and apply to other simulation areas. Each of the practical simulation examples is shown and the validity is demonstrated.

A study of battery modeling technologies for vehicle system simulations

The goal of this research is a proposal of a standard model for vehicle system simulations. Recently, the CO2 reduction and efficiency improvement of the energy consumption are important subjects in development of the vehicle systems. The new technologies related to vehicle development have continued to increase in complexity. For these reasons, the energy management simulation by the coordinated design of an electric system and vehicle system is required. The electrical behavior of the batteries becomes important to improve the energy management in the vehicle systems. The battery modeling technologies and the application example for vehicle system simulation are reported.

Fundamental modeling of vehicle power network system using VHDL-AMS

The vehicle system is a multi-domain system that requires many branches of science and engineering. Therefore the development of the vehicle system requires the use of design methodologies that utilize simulations, which have grown increasingly sophisticated in recent years. This paper describes how VHDL-AMS was used to model the powertrain, alternator and battery system that are the basic elements of the vehicle power network system, and examines the simulation results with the aim of realizing a system simulation whose scope covers the entire vehicle.