Pill-Soo Kim

Cost modeling of battery electric vehicle and hybrid electric vehicle based on major parts cost

There is a growing interest in electric vehicles due to environmental concerns. Concerning the environment, EVs can provide emission-free transportation. Even taking into account the emissions from the power plants needed to fuel the vehicles, the use of EVs can still significantly reduce global air pollution. Recent efforts are directed toward developing an improved main component systems for the electric vehicle applications. Soon after the introduction of electric starter for internal combustion engine early this century, despite being high-energy efficient and nonpolluting, electric vehicle lost the battle completely to internal combustion engine due to its limited range and inferior performance. But, electric vehicles offer the most promising solutions to reduce the emission of vehicles. This paper describes a method for cost reduction estimation of electric vehicle (battery electric vehicle and hybrid electric vehicle). We used a cost reduction structure that consisted of five major subsystems for electric vehicle. Especially, we estimated the potential for cost reductions in electric vehicle as a function of time using the learning curve. Also, we estimated the potentials of cost by depreciation.

A method for future cost estimation of hybrid electric vehicle

There is a growing interest in hybrid electric vehicles due to environmental concerns. Recent efforts are directed toward developing an improved main component systems for the hybrid electric vehicle applications. Soon after the introduction of electric starter for the internal combustion engine early this century, despite being energy efficient and nonpolluting, the electric vehicle lost the battle completely to the internal combustion engine due to its limited range and inferior performance. Hybrid electric vehicles offer the most promising solutions to reduce the emission of vehicles. This paper describes a method for cost reduction estimation of hybrid electric vehicle. The authors used a cost reduction structure that consisted five major subsystems (three-type battery and two-type motor) for hybrid electric vehicles. Especially, they estimated the potential for cost reductions in hybrid electric vehicle as a function of time using the learning curve.

Relative cost modeling of electric vehicle in Korea

This paper describes a method for cost reduction estimation of electric vehicle. We used a cost reduction structure that consisted of five major subsystems (four-type battery and two-type motor) for electric vehicle. Especially, we estimated the potential for cost reductions in electric vehicle as a function of time using the learning curve. Also, we estimated the potentials of cost by depreciation.

An investigation to general characteristics of impulse magnetizer. I. Circuit, thermal and cost modeling of impulse magnetizer

A capacitor discharge impulse magnetizer is used to produce a high current impulse of short duration in a magnetizing fixture for magnets of the various shapes. This paper describes the development of a circuit model, thermal model and cost model for a capacitor discharge impulse magnetizer and compares simulations to measurements from an actual system. Especially, the temperature computation of discharging circuits of the impulse magnetizer is very important since it gives some indication of the design of the magnetizing circuits. Also, the authors used a cost structure consisted of five major subsystems for cost modeling. Especially, they estimated the potential for a cost reductions in impulse magnetizers as a function of time using the learning curve, and the potentials of cost by depreciation.

An investigation to general characteristics of impulse magnetizer. II. Field modeling and thermal modeling of magnetizing fixture

This paper describes field modeling and thermal modeling for magnetizing fixture. As the detailed characteristics of magnetizing fixture can be obtained, the efficient design of a magnetizer which produces the desired magnet will be possible using such modeling. For field modeling, finite-element analysis (using the MAXWELL two-dimensional field simulator) is used as part of the design and analysis process for the magnetizing fixture. The thermal modeling method of the magnetizing fixture resistor uses a multi-lumped model with equivalent thermal resistance and thermal capacitance. Reliable results are obtained by using an iron core fixture (stator magnet of car air-cleaner DC motor) coupled to a middle-voltage magnetizer (charging voltage: 1200 V, capacitor bank: 4000 /spl mu/F).

Exact parameter estimation of impulse magnetizer and, thermal analysis under this parameter

A capacitor discharge impulse magnetizer is used to produce a high current impulse of short duration in a magnetizing fixture for magnets of various shapes. This paper describes a method for exact parameter estimation of impulse magnetizer and a method for thermal analysis of the impulse magnetizer using this parameter. As the detailed thermal characteristics of the impulse magnetizer can be obtained, the efficient design of the impulse magnetizer which produces the desired magnet will be possible using our analysis procedure. Also, the temperature computation of discharging circuits of the impulse magnetizer is very important since it gives some indication of the design of the magnetizing circuits. Therefore, a method for thermal analysis of the impulse magnetizer is presented.

Part I-circuit, thermal and cost modeling of impulse magnetizer

A capacitor discharge impulse magnetizer is used to produce a high current impulse of short duration in a magnetizing fixture for magnets of the various shapes. This paper describes the development of a circuit model, thermal model and cost model for a capacitor discharge impulse magnetizer and compares simulations to measurements from an actual system. Especially, the temperature computation of discharging circuits of an impulse magnetizer is very important since it gives some indication of the design of the magnetizing circuits. Also, the authors used a cost structure consisted of five major subsystems for cost modeling.

Field and thermal modeling for impulse magnetizing fixture based on exact parameter estimation

A capacitor discharge impulse magnetizer is used to produce a high current impulse of short duration in a impulse magnetizing fixture for magnets of the various shapes. This paper describes a method for the exact parameter estimation of an impulse magnetizer and a method for field and thermal analysis of an impulse magnetizer using this parameter. As the detailed field and thermal characteristics of an impulse magnetizer can be obtained, the efficient design of an impulse magnetizer which produce desired magnet will be possible using this analysis procedure. As the parameter estimation method of impulse magnetizer, two different estimation methods (a method considering contact resistance and a method using air-core test coil) are presented. Also, the temperature computation of discharging circuits of an impulse magnetizer is very important since it gives some indication of the design of the magnetizing circuits. Therefore, a method for thermal analysis of impulse magnetizer is presented.

A study on the loss model and characteristic comparison of three-level converter and full-bridge converter through the conduction loss analysis of power devices

This paper presents the loss model and characteristic comparison of a three-level converter and a full-bridge converter through the conduction loss analysis of power devices. It shows the main reason of efficiency diminution, comparing of a full-bridge converter with a three-level converter. Also, the loss analysis of each component and the various losses in the circuit are proposed in this paper. The result of the analysis is verified with 2.5 kW prototype.

A Study on the ZVZCS Three Level DC/DC Converter without Primary Freewheeling Diodes

This paper presents ZVZCS(Zero-Voltage and Zero-Current Switching) Three Level DC/DC Converter without primary freewheeling diodes. The new converter presented in this paper used a phase shirt control with a flying capacitor in the primary side to achieve ZVS for the outer switches. A secondary anxiliary circuit which consists of one small capacitor, two small diodes and one coupled inductor, is added in the secondary to provide ZVZCS conditions to primary switches, ZVS for outer switches and ZCS for inner switches. Many advantages include simple secondary auxiliary circuit topology, high efficiency, and low cost make the new converter attractive for high power applications. Also the circulating current flows through the circuit so that it causes the needless coduction loss to be occurred in the devices and the transformer of the circuit The new converter has no primary auxiliary diodes for freewheeling current. The principle of operation, feature and design considerations are illustrated and verified through the experiment with a 1[㎾］ 50[KHz］IGBT based experimental circuit.