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Regenerative Current Control Method of Bidirectional DC/DC Converter for EV/HEV Application
Lee, Jung-Hyo,Jung, Doo-Yong,Lee, Taek-Kie,Kim, Young-Ryul,Won, Chung-Yuen The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.1
The control method of the bidirectional DC/DC converter for instantaneous regenerative current control is described in this paper. The general method to control the DC/DC converter is the output voltage control. However, the regenerative current cannot be controlled to be constant with this control method. To improve the performance of the conventional control method, the DC-link voltage of the inverter is controlled within the tolerance range by the instantaneous boost and buck operations of the bidirectional DC/DC converter. By the proposed control method, the battery current can be controlled to be constant regardless of the motor speed variation. The improved performance of the DC/DC converter controlled by the proposed control method is verified by the experiment and simulation of the system with the inverter and IPMSM(Interior Permanent Magnet Synchronous Motor) which is operated by the reduced practical speed profile.
Battery Charging System for PHEV and EV using Single Phase AC/DC PWM Buck Converter
Lee, Jung-Hyo,Jung, Doo-Yong,Park, Sang-Hoon,Lee, Taek-Kie,Kim, Young-Ryul,Won, Chung-Yuen The Korean Institute of Electrical Engineers 2012 Journal of Electrical Engineering & Technology Vol.7 No.5
In this paper, a battery charging system for Plug-in Hybrid Electric Vehicle (PHEV) and Electric Vehicle (EV), and operation algorithm of charging system are introduced. Also, the proposed charging system uses commercial electricity in order to charge the battery of parked PHEV and 48V battery charging system with power factor controllable single phase converter for PHEV is investigated in this paper. This research verifies the power factor control of input and the converter output controlled by the charge control algorithm through simulation and experiment.
Battery Charging System for PHEV and EV using Single Phase AC/DC PWM Buck Converter
Jung-Hyo Lee,Doo-Yong Jung,Sang-HoonPark,Taek-Kie Lee,Young-Ryul Kim,Chung-Yuen Won 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.5
In this paper, a battery charging system for Plug-in Hybrid Electric Vehicle (PHEV) and Electric Vehicle (EV), and operation algorithm of charging system are introduced. Also, the proposed charging system uses commercial electricity in order to charge the battery of parked PHEV and 48V battery charging system with power factor controllable single phase converter for PHEV is investigated in this paper. This research verifies the power factor control of input and the converter output controlled by the charge control algorithm through simulation and experiment.
Auxiliary Switch Control of a Bidirectional Soft-Switching DC/DC Converter
Jung-Hyo Lee,Dong-Ho Yu,Jun-Gu Kim,Young-Ho Kim,Soo-Cheol Shin,Doo-Yong Jung,Yong-Chae Jung,Chung-Yuen Won IEEE 2013 IEEE transactions on power electronics Vol.28 No.12
<P>In this paper, the auxiliary switch control using a lookup table is proposed to enhance the efficiency of the bidirectional dc/dc converter used in electric vehicle, which performs soft switching. Continuous current data are difficult to obtain during a resonant operation due to the limit of DSP ADC capacity. The proposed auxiliary switch control has a lookup table reference of the auxiliary switch turn-on time. The control method properly controls the auxiliary switch turn-on time according to the required load current; this auxiliary switch control brings the more efficient control in generative and regenerative mode operation. The proposed approach has been validated by the results of experiments on a bidirectional dc/dc converter, inverter, and interior permanent magnet synchronous motor.</P>
Load modeling for the drum washing machine system simulation
Jung-Hyo Lee,Tae-Woong Kong,Won-Chul Lee,Jae-Sung Yu,Choong-Yuen Won 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
In this paper, we explained the load modeling of drum washing machine for determining the rating of motor drive device. The motor drive should supply enough current to motor in spite of load variation. However, drum washing machine load torque is not only affected by the weight. Besides, drum washing machine load torque has the frequency which is influenced by the drum velocity. We analyze the forces that affect the laundry. And the load torque is designed by the mathematical equation. Finally, we compare the conventional constant torque and the proposed load torque simulation.
Soft-Switching Bidirectional DC/DC Converter with a LC Series Resonant Circuit
Jung, Doo-Yong,Hwang, Sun-Hee,Ji, Young-Hyok,Lee, Jung-Hyo,Jung, Yong-Chae,Won, Chung-Yuen IEEE 2013 IEEE transactions on power electronics Vol.28 No.4
<P>In this paper, a soft-switching bidirectional dc/dc converter with a LC series resonant circuit is proposed. The proposed converter has been obtained by adding LC series resonant tank in the conventional bidirectional dc/dc converter. The proposed topology performs soft switching at both buck and boost operations. Through the theoretical boost and buck mode analysis, zero voltage switching operation is explained. Moreover, characteristics of the proposed topology are verified with simulation and experimental results.</P>
Regenerative Current Control Method of Bidirectional DC/DC Converter for EV/HEV Application
Jung-Hyo Lee,Doo-Yong Jung,Taek-Kie Lee,Young-Ryul Kim,Chung-Yuen Won 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.1
The control method of the bidirectional DC/DC converter for instantaneous regenerative current control is described in this paper. The general method to control the DC/DC converter is the output voltage control. However, the regenerative current cannot be controlled to be constant with this control method. To improve the performance of the conventional control method, the DC-link voltage of the inverter is controlled within the tolerance range by the instantaneous boost and buck operations of the bidirectional DC/DC converter. By the proposed control method, the battery current can be controlled to be constant regardless of the motor speed variation. The improved performance of the DC/DC converter controlled by the proposed control method is verified by the experiment and simulation of the system with the inverter and IPMSM(Interior Permanent Magnet Synchronous Motor) which is operated by the reduced practical speed profile.
역기전력 추정기를 이용한 전류 모델 기반의 SPMSM 센서리스 벡터제어
이정효(Jung-Hyo Lee),유재성(Jae-Sung Yu),공태웅(Tae-Woong Kong),이원철(Won-Chul Lee),원충연(Chung-Yuen Won) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
The current model based sensorless method has many benefits that it can be robust control for large load torque. However, this method should determine a coefficient of back electro motive force(back-emf). This coefficient is varied by load torque and speed. Also, the coefficient determining equation is not exist, so it is determined only by experiment. On the other hands, using only back-emf estimatior method can not drive in low speed area and it has weakness in load variation. For these problems, this paper suggests the hybrid sensorless method that mixes the back-emf estimator regarding saliency and the current based sensorless model. This estimator offers not only non-necessary coefficient for current sensorless model, but also wide speed area operating in no specific transition method.