http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Novel PWM Method with Low Ripple Current for Position Control Applications of BLDC Motors
Kim, Hag-Wone,Shin, Hee-Keun,Mok, Hyung-Soo,Lee, Yong-Kyun,Cho, Kwan-Yuhl The Korean Institute of Power Electronics 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.5
BLDC Motors are widely used in various speed control applications due to their ease of control and low cost. Generally, the unipolar PWM method is used for speed control applications. However, the unipolar PWM method has a current spike problem in the braking operation which can be a problem in speed reversal which generally happens in position control applications. However, the current spike problem can be solved by the conventional bipolar PWM method. Although the current spike problem can be solved, the conventional bipolar PWM method has the problem of a large current ripple. In this paper, a novel bipolar PWM method is proposed to solve this problem. The current ripple and the current spike problems are analyzed in this paper for the unipolar and bipolar PWM methods. At last, the merits of the proposed bipolar PWM method are proven by experiment.
Novel PWM Method with Low Ripple Current for Position Control Applications of BLDC Motors
Hag-Wone Kim,Hee-Keun Shin,Hyung-Soo Mok,Yong-Kyun Lee,Kwan-Yuhl Cho 전력전자학회 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.5
BLDC Motors are widely used in various speed control applications due to their ease of control and low cost. Generally, the unipolar PWM method is used for speed control applications. However, the unipolar PWM method has a current spike problem in the braking operation which can be a problem in speed reversal which generally happens in position control applications. However, the current spike problem can be solved by the conventional bipolar PWM method. Although the current spike problem can be solved, the conventional bipolar PWM method has the problem of a large current ripple. In this paper, a novel bipolar PWM method is proposed to solve this problem. The current ripple and the current spike problems are analyzed in this paper for the unipolar and bipolar PWM methods. At last, the merits of the proposed bipolar PWM method are proven by experiment.
Current Controller with Adaptive Compensation of Voltage Distortion of PWM VSI
Hag-Wone Kim,Myung-Joong Youn,Kwan-Yuhl Cho,Hyun-Soo Kim 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
Generally, there exists a voltage distortion or nonlinear voltage gain exists between the reference and output voltages in a pulse-width-modulated (PWM) voltage-sourceinverter (VSI). Voltage distortion varies with the operating conditions such as the temperature, DC bus voltage, and phase current level. Also this voltage distortion affects the machine current distortion, torque pulsations, and degradation of control performance. In this paper, the voltage distortion in a PWM VSI is analyzed and a new current<br/> control method with on-line compensation of this voltage distortion is proposed based on the model reference adaptive system (MRAS). The simulation and experimental results show the effectiveness of the proposed current controller with adaptive compensation of voltage distortion.
영구자석 동기전동기 구동을 위한 전압원 인버터의 적응제어기법을 이용한 전압 왜곡 관측 및 보상
김학원(Hag-Wone Kim),윤명중(Myung-Joong Youn),김현수(Hyun-Soo Kim),조관열(Kwan-Yuhl Cho) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Generally, a voltage difference exists between the reference and the output voltagesin a pulse width modulated (PWM) voltage source inverter (VSI). In this paper, the nonlinearity in a PWM VSI is analyzed and a new on-line estimation method in consideration of parameter variations for a permanent magnet synchronous motor (PMSM) is proposed to compensate the time varying voltage distortion.
영구 자석 매립형 BLDC Motor의 Sensorless 제어기 설계
김학원(Hag-Wone Kim),안준호(Jun-Ho Ahn),양순배(Soon-Bae Yang),조관열(Kwan-Youl Cho),김정철(Jung-Chul Kim) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
The Inverter fed BLDC(Brushless DC) motor has been increasingly applied to industry and horne appliances due to the advance of power electronics and permanent magnet technology, and its high efficiency and good acoustic noise characteristics The BLDC<br/> motor and drives, however, require the rotor position sensors that may cause some problems such as the high cost and space<br/> In this paper, sensorless algorithm for an interior permanent magnet BLDC motor is proposed The<br/> maximum torque per ampere operation with advance angle considering load torque and speed was simulated and verified through the experiment
90-260V_rms 입력범위를 갖는 단일전력단 고역률 컨버터
김학원(Hag-Wone Kim),문건우(Gun-Woo Moon),조관열(Kwan-Youl Cho),윤명중(Myung-Joong Youn) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
A new single stage power factor corrected AC/DC converter has been proposed, that is unified with buck topology and suitable for universal input The design example of the proposed converter for 5V 12A application has been presented. The design considerations and simulation results for the proposed converter have been shown. The simulation results show that the line input current harmonics can meet IEC 1000-3-2 Class D requirements for the line input voltage from 90 to 260V.
김명복(Kim Myung-Bok),김학원(Kim Hag-Wone),김건수(Kim Geon-Su),윤명중(Youn Myung-Joong) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper presents the inductance calculation of compulsator by obtaining the solution of Laplace equation Since the characteristic of material of compulsator makes the boundary conditions changed, this method is useful for various materials of compulsator
부하각을 고려한 이중회전자 영구자석 동기전동기의 약자속 제어 해석
김진영(Jin-Young Kim),김성훈(Seong-Hoon Kim),조관열(Kwan-Yuhl Cho),김학원(Hag-Wone Kim),이상민(Sang-Min Lee),박찬배(Chan-Bae Park) 전력전자학회 2024 전력전자학회 논문지 Vol.29 No.3
The double rotor PM synchronous motor(DR-PMSM) has been studied to reduce the mechanical losses and maintenance of the mechanical speed reducers in a railway vehicle driving system. DR-PMSM consists of a non-contact magnetic gear with two rotors, PM rings, and three phase stator windings. The torque of DR-PMSM depends on the load angle between inner and outer rotors as well as the field flux and stator currents. The high-speed operating ranges of DR-PMSM can be extended by flux weakening control, such as the conventional three-phase PM synchronous motor. The available dq currents in the flux weakening mode are restricted by the current limit circle and the voltage limit ellipse. The center of the voltage limit ellipse for DR-PMSM is not fixed but shifts depending on the load angle, whereas that for the conventional single rotor PMSM is fixed. This study analyzes the operating point of dq currents for the given speeds and load torque under flux weakening mode of DR-PMSM. Additionally, the operating characteristics of flux weakening control are verified through Matlab/Simulink simulation and 1kW DR-PMSM experiment.