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양현섭(Hyun Sup Yang),권대복(Dae Bok Kwon),조경석(Kyung Seok Cho),이창하(Lee Chang Ha) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper presents noise reduction FCEV (Fuel Cell Electric Vehicle) turbo type Air Blower. Noise of centrifugal air blower consists of the aerodynamic noise , resonance of the rotor, electromagnetic noise of a motor, bearing failure noise. Conducted test and analysis in order to improve the noise of the initial sample was measured. Through the test, rotor resonant mode, rotor unbalance, case resonance, and bearing problems as the cause of the noise was classified. Have found ways to resolve the problem, improved designs were considered and through the test, verify improved design.
기계적 응력을 고려한 수소 연료전지 자동차용 초고속 동기전동기의 회전자 설계
김재현(Jae-Hyun Kim),김동민(Dong-Min Kim),이정민(Jeong-Min Lee),홍정표(Jung-Pyo Hong),최규성(Kyu Sung Choi),양현섭(Hyun Sup Yang),조경석(Kyung Seok Cho) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
In this paper, the rotor design of ultra-high-speed synchronous motor for hydrogen fuel cell electric vehicle considering mechanical stress is carried out. The rotor consists of shaft, permanent magnet, and sleeve. Airgap magnetic flux density, which determines the electrical characteristics, is calculated using spatial harmonic analysis. The mechanical stress was estimated using the equations calculated from the equilibrium equations and the safety factor of permanent magnet and sleeve are calculated based on the von-Mises theory. The rotor is designed to have a safety factor of 1.1 or higher at a maximum speed of 110krpm and a driving remperature of 200℃, while satisfying the target airgap magnetic flux density. Then, airgap magmetic flux density and mechanical stress of the designed rotor were verified using finite element analysis.
연료전지 전기자동차용 초고속 영구자석 동기전동기의 효율 최적설계
김재현(Jae-Hyun Kim),김동민(Dong-Min Kim),박현진(Hyeon-Jin Park),홍정표(Jung-Pyo Hong),최규성(Kyu-Sung Choi),양현섭(Hyun-Sup Yang),조경석(Kyung-Seok Cho) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
In this paper, optimum design for efficiency of ultra-high-speed permanent magnet synchronous motor for hydrogen fuel cell electric vehicle air blower is performed. First, the design factors that greatly affect the copper loss, iron loss and eddy current loss were selected using analysis of variance. Then, the experimental points were selected using the Latin hypercube sampling method, which is a statistical method for generating a near-random samples of the design factor values from a multidimensional distribution and the test was carried out using an electromagnetic finite element method. Based on the test results, the Gaussian process is used to optimize the efficiency. Finally, the loss and efficiency of the optimum model were verified by using finite element analysis.
수소 연료전지 자동차용 초고속 동기전동기의 영구자석 오버행 결정
이정민(Jeong-Min Lee),김재현(Jae-Hyun Kim),김동민(Dong-Min Kim),홍정표(Jung-Pyo Hong),최규성(Kyu Sung Choi),양현섭(Hyun Sup Yang),조경석(Kyung Seok Cho) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
This study investigates overhang effect of ultra-high-speed motor for hydrogen fuel cell electric vehicle, and determines the final overhang length. The rotor shaft of ultra-high-speed motor is mainly made of stainless steel material which can be safe from high mechanical stress caused by high rotation speed. However, it is necessary to confirm characteristics of stainless material because it has different mechanical properties depending on the metal structure. In this paper, the rotor of the motor is surface permanent magnet synchronous motor (SPMSM) type, which is composed, of shaft which is solid shaft type, permanent magnet and can. Material of the shaft is determined by SUS630, which is safe from the target rotation speed. However, SUS630 has a relatively high magnetic permeability. Therefore, it causes axial direction leakage in the shaft structure of the target model in which the shaft and the PM is attached in the axial direction. To overcome this problem, permanent magnet overhang effect according to changing the overhang length is applied to minimize the decreasing performance caused by the leakage magnetic flux, and is determined to satisfy the output.
하이브리드 에너지 저장장치를 고려한 연료전지 전기자동차의 모델링 및 연료전지 출력 패턴 예측
김동민(Dong-Min Kim),김재현(Jae-Hyun Kim),박현진(Hyeon-Jin Park),홍정표(Jung-Pyo Hong),임명섭(Myung-Seop Lim),최규성(Kyu-Sung Choi),양현섭(Hyun-Sup Yang),조경석(Kyung-Seok Cho) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
Recently, the fuel cell electric vehicle (FCEV) is getting attention because of not only environmental friendly aspects but also fine dust reduction policy. Commercialization of FCEV has begun, and now the FCEV development is confronted with the goal of improving the energy efficiency of the vehicle system which can extend the driving range. To achieve the mileage improvement, the main operating region of traction motor, battery, and fuel cell should be grasped. This paper deals with the modeling of the FCEV considering hybrid energy storage system (HESS). The traction motor was reflected as the efficiency map from the finite element analysis (FEA) considering the control strategy. For the HESS which consisted of battery and fuel cell, the second order RC equivalent circuit and Dicks-Larminie model was adopted respectively. In addition, a simplified rule-based control logic was introduced and adopted in vehicle simulation. Finally, from the vehicle simulation, the output power pattern of the fuel cell was estimated.