자동차용 내 , 외장 플라스틱의 최근 개발 동향

임양수 한국공업화학회 1996 한국공업화학회 심포지엄 Vol.4 No.-

LLC 형 및 LC형 직렬 공진형 컨버터의 주파수 특성에 관한연구 ( A study on the frequency characteristic of the LLC-type and LC-type series resonant convert )

임양수,차인수,박해암,백형태 대한전자공학회 1993 대한전자공학회 학술대회 Vol.1993 No.7

위상각 전압제어기에 의한 단상유도전동기 기동특성 개선

임양수,백형래,Lim, Yang-Su,Baek, Hyung-Lae 전력전자학회 1996 전력전자학회지 Vol.1 No.1

The common drive method of the single phase induction motor(SPIM) is to install a start capacitor and a centrifugal switch in series with the auxiliary winding. In this paper, the phase angle voltage sequence controller is proposed to eliminate a start capacitor and a centrifugal switch of SPIM. In comparison with the capacitor start system of SPIM, the proposed control system shows that it contributes to saving the starting current about 57% and to improving of the starting efficiency of SPIM. The proposed starting characteristics of the SPIM is obtained with this strategy through simulation and experimental results.

[시] 지하철에서

임양수 고시계사 2021 考試界 Vol.66 No.2

유방암에서 CEA, CA15-3 및 TPS의 예후인자로서의 가치

임양수,정진향,박호용,이영하,고창대 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.73 No.1

Purpose: Tumor markers are often used to monitor the response to therapy and to detect recurrences in patients with resected breast cancer. Here we evaluated the prognostic value of the preoperative serum concentrations of tumor markers in patients with breast cancer. Methods: The preoperative serum concentrations of tumor markers (CEA, CA15-3 and TPS) were measured in 670 patients who were treated via potentially curative surgical resection for breast cancer from 2001 to 2004. We investigated the association of the serum concentrations of tumor markers with the disease-free survival and overall survival at the time of the primary diagnosis in relation to the established prognostic factors such as tumor size, lymph node status, hormonal receptor status, age and menopausal status. Results: The established prognostic factors and the elevated preoperative serum tumor marker values were correlated with disease-free survival (CEA: P=0.014, CA15-3: P=0.002 and TPS: P<0.001) and overall survival (CEA: P=0.045, CA15-3: P=0.002 and TPS: P<0.001) on univariate analysis. On multivariate analysis, tumor size, lymph node status, hormone receptor status and TPS (P=0.03) were independent prognostic factors for recurrence and the lymph node status, hormone receptor status and TPS serum level (P<0.001) were independent prognostic factors for overall survival. Conclusion: The preoperative serum concentrations of tumor makers (CEA, CA15-3 and TPS) are strong independent prognostic factors for recurrence and survival in patients with breast cancer. The tests for the preoperativeserum concentrations of tumor markers have convenient and reproducible advantages while the others require tumor tissue. Patients with elevated preoperative serum tumor marker values need appropriate adjuvant therapy, careful monitoring and detection of recurrences during the follow-up period. (J Korean Surg Soc 2007;73:21-26)

단상유도전동기의 새로운 아날로그 구동시스템 연구

임양수 서강정보대학 1998 論文集 Vol.17 No.-

For the SPIM is can't generate rotating flux itself, an additional starting system should be installed on the SPIM. There are several methods embody the starting system. Among the methods, the capacitor start method is composed of a starting condenser and centrifugal. But the centrifugal switch and the starting condenser have some problems of the starting failure, the breaking under the worse condition and it brings about the short life of the motor.l), 2) ,3) Nowadays, users demand higher efficiency, reliability, miniaturization and noise immunity than the conventional motor. The conventional control drivers using variable frequency and DSP control have not been applied to drivers using variable frequency and DSP control have not been applied to the SPIM because of starting problems and cost. In this paper, new analog starting control strategy is proposed instead of capacitor start method. When the starting current of the motor is minimized phase angle difference in the main and auxiliary winding without the centrifugal switch and the starting condenser, the efficiency of motor is improved. The proposed analog control of the SPIM is obtained with new strategy through experimental results.

단상유도전동기의 소프트 기동특성에 관한 연구

임양수 서강대학 지역발전연구소 1997 지역발전연구 : 서강전문대 Vol.4 No.1

Single phase induction motors(SPIM's) have been widely used in applications of light duty such as washing machines, oil burners, bottle washers, blowers, grinders, machine tools, and a host of other applications. SPIM' s are inherently suitable for single phase power supplies, very simple in structure and rugged, of which rotor structure is generally squirrel cage rotor similar to polyphase induction motors. The SPIM can not start as such motors but once start in a given direction by mechanical switch it can approach nearly synchronous speed on condition that the load torque is not excessive. The capacitor starting method has been widely used to start SPIM for producing a dominant rotating magnetic field at standstill. To overcome the lack of sufficient starting torque, capacitor starting SPIM is provided both capacitor and centrifugal switch in series with the auxiliary winding circuit. A new method to start smoothingly a single phase induction motor by using a TRIAC is presented in this paper without the centrifugal switch. Solid state soft starters based on TRIAC's often used to decrease the starting current of the three phase motors. However, Even today, the capacitor-start single phase induction motor using centrifugal or relay switch is one of the most important and most widely used of all the types of single phase motors. In this paper, single phase induction motor input current was detected by a small current transformer. The soft start strategy is based on limited auxiliary current angle during starting period in the closed loop control. Simulation and experimental results of the SPIM using the TRIAC control are studied and discussed in the aspects of starting characteristics of the SPIM.

One-Chip Microcontroller Starting Switch of The Single-Phase Induction Motor

임양수 서강전문대학 2000 산업과학연구 Vol.2 No.-

단상유도전동기는 구조가 간단, 보수가 간편, 가격이 저렴한 이점 등을 가지고 있지만 기동 토크를 발생시키기 위하여 일반적으로 보조권선을 추가하고 보조권선에 원심력스위치와 진상용 콘덴서를 삽입하여 사용하고 있으며 산업용 소용량 동력장치와 가정용, 사무용 기기에 널리 이용되고 있다. 본 논문에서는 단상유도전동기의 원심력스위치와 진상용 콘덴서를 제거하고 원 칩 마이크로컨트롤러를 이용한 주권선과 보조권선의 기동시 전류제어 실험결과를 나타냈으며, 새로운 원 칩 마이크로컨트롤러 스위치를 개발하여 단상유도전동기의 소프트 스타팅을 제안하였다.

보조권선 전압제어에 의한 단상유도전동기 기동특성에 관한 연구

임양수 서강정보대학 1996 論文集 Vol.15 No.-

The most common starting method of the single phase induction motor(SPIM) is to install a starting condenser and a centrifugal switch in series with the auxiliary winding. This method is simple but life of the SPIM is short, efficiency improvement has limitation because of the malfunction of the starting condenser and the centrifugal switch. In the general, starting characteristics of the single phase induction motor is accomplished by the amplitude voltage and phase angle difference between main and auxiliary winding. In the reason, the applied voltage amplitude of the single phase induction motor is controlled for improvement starting performence characteristics. In this paper, the starting characteristics of the SPIM is improved by voltage control strategy of auxiliary winding. Finally, the excellent starting performance and characteristics of the SPIM are shown through simulation and experimental results.

안구적출의 원인에 대한 통계적 고찰

임양수,윤평열 대한안과학회 1979 대한안과학회지 Vol.20 No.3