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정병호(Byung-Ho Chung),임홍우(Hong-Woo Lim),최연옥(Youn-Ok Choi),조금배(Geum-Bae Cho),백형래(Hyung-Lae Baek),오금곤(Geum-Gon Oh) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
LIM have mall11y different poll1t considering rotary induction motor, that is end effect In this paper described that, end effect, adding to the rotary induction motor They can be designed because of affects magnetizing inductance and series resistance in the d-axis circuit. After LIM modeling, Using<br/> SVPWM, apply to vector control this model. We can verify feasibility of field oriented control technology can control speed by simulation
궤환 선형화 및 전류오차를 이용한 유도전동기 비선형 센서리스제어
서강성(Kang-Sung Seo),정삼용(Sam-Yong Jeong),정병호(Byung-Ho Jung),이강연(Kang-Youn Lee),조금배(Geum-Bae Cho),백형래(Hyung-Lae Baek) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, author consider the nonlinear control by using feedback linearization for independent control and estimation algorithm such as speed, rotor flux and rotor resistance to achieve sensorless control of induction motor.<br/> The dynamic characteristics of the proposed nonlinear control algorithm is verified by simulation.
최연옥(Youn-Ok Choi),이강연(Kang-Yeun Lee),조금배(Gewn-Bae Cho),백형래(Hyung-Lae Baek),이진섭(Jin-Seob Lee),최낙일(Nak-Il Choi),임병옥(Byung-Ok Lirn) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
Direct Torque Control(DTC) of AC motor has the fast torque and flux dynamic responses even though it has very simple scheme to implement.<br/> However, DTC do not show good performance at low speed range with conventional open loop stator flux observer when stator resistance varied.<br/> So, authors proposed nonlinear stator flux obsever in order to flux estimation at low speed and show its simulation results.
인버터식 X선 발생장치용 고압변압기의 특성개선에 관한 연구
이성길(Seong-Kil Lee),박수강(Su-Kang Park),이강연(Gang-Youn Lee),조금배(Geum-Bae Cho),백형래(Hyung-Lae Baek),임병옥(Byung-Ok Lim) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
The conventional types of X-ray generators were bulky in physical size and heavy in weight, and the control accuracies of the output voltages were not always satisfactory The high frequency switching inverter and converter technology on power conversion and control systems have been greatly closed up introducing power semiconductor devices. To decreasing the volume and the weight of high voltage transformer, and to stabilize ripple.<br/> In this paper, the newly developed converter to take the balance of the output voltage versus the ground are also presented m detail. This converter consists of the two independent series resonant circuits using the two capacitances and the two primary windings of high-voltage transformer.
최창주,서강성,박수강,조금배,백형래,임병옥 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80% of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of universal starting switch by digital controller to overcome these shortcomings of centrifugal switch.