• 전력전자학회논문지
• /
• 제13권4호
• /
• pp.263-269
• /
• 2008

본 연구에서는 연속도통모드에서 단일 공진 인덕터를 사용하여 ZVT를 갖는 interleaved 부스트 컨버터를 제안한다. ZVT셀을 가지는 제안된 ZVT가지는 Interleaved 부스트 컨버터는 간단한 회로를 가지며 필터 사이즈 감소와 저 비용이 가능하다는 장점을 가진다. 또한 고 전력 응용에 적합하다. 본 논문에서 제안된 ZVT 가지는 IBC의 회로와 동작 원리를 자세히 설명하였다. 그리고 제안된 ZVT 기법의 타당성은 실험을 통하여 검증하였다.

• Journal of Power Electronics
• /
• 제14권5호
• /
• pp.890-898
• /
• 2014

Critical conduction mode boost power factor correction converters operating at the boundary of continuous conduction mode and discontinuous conduction mode have been widely used for power applications lower than 300W. This paper proposes an enhanced variable on-time control method for the critical conduction mode boost PFC converter to improve the total harmonic distortion characteristic. The inductor current, which varies according to the input voltage, is analyzed in detail and the optimal on-time is obtained to minimize the total harmonic distortion with a digital controller using a TMS320F28335. The switch on-time varies according to the input voltage based on the computed optimal on-time. The performance of the proposed control method is verified by a 100W PFC converter. It is shown that the optimized on-time reduces the total harmonic distortion about 52% (from 10.48% to 5.5%) at 220V when compared to the variable on-time control method.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2012년도 전력전자학술대회 논문집
• /
• pp.195-196
• /
• 2012

In recent years, in an effort to improve the efficiency and the power density of the front-end power factor correction(PFC), the interleaving of multiple converter is employed. The conventional interleaved continuous conduction mode(CCM) boost PFC converter requires input and output voltage sensing and three current sensing to obtain current balancing between modules. In this paper, the interleaved CCM PFC converter based on modulated carrier control is proposed. With the proposed method, two phase interleaved PFC can be realized simply without line voltage sensing resistor and can achieve current balancing without additional current sensing resistor on common return path. The simulation studies are carried out to verify the effectiveness of the proposed control scheme.

• 한국조명전기설비학회지:조명전기설비
• /
• 제8권3호
• /
• pp.36-43
• /
• 1994

본 연구는 교류전원측에서 콘버터에 의해 출력전압조정과 동시에 입력전류가 전압과 동상에 가까운 정현파가 되도록 하기 위해 고주파 스위칭에 의한 단상 부스터 콘버터의 제어방식을 분석하고 가변밴드폭 제어방식에 의해 1[kW]부하에 대하여 각 파라메타를 산정하며 실험장치를 구성하여 주파수 스팩트럼 분석기에 의한 분석을 토대로 고역률 동작을 확인하고자 한다.

• Journal of Power Electronics
• /
• 제16권5호
• /
• pp.1861-1868
• /
• 2016

In this paper, a three-phase AC-DC high step-up converter is developed for application to microscale wind-power generation systems. Such an AC-DC boost converter prossessess the property of the single-switch high step-up DC-DC structure. For power factor correction, the advanced half-stage converter is operated under the discontinuous conduction mode (DCM). Simulatanously, to achieve a high step-up voltage gain, the back half-stage functions in the continuous conduction mode (CCM). A high voltage gain can be obtained by use of an output-capacitor mass and a coupled inductor. Compared to the output voltage, the voltage stress is decreased on the switch. To lessen the conducting losses, a low rated voltage and small conductive resistance MOSFETs are adopted. In addition, the coupled inductor retrieves the leakage-inductor energy. The operation principle and steady-state behavior are analyzed, and a prototype hardware circuit is realized to verify the performance of the proposed converter.

• Journal of Power Electronics
• /
• 제12권5호
• /
• pp.689-698
• /
• 2012

This paper investigates the effects of applying different input current waveshapes on the performance of a continuous-conduction-mode (CCM) power-factor-correction (PFC) boost pre-regulator. It is found that the output voltage ripple of the pre-regulator can be reduced if the input current is modified to include controlled amount of higher order harmonics. This finding allows us to balance the performance of output regulation and the harmonic current emission when coming to the design of the pre-regulator. An experimental PFC boost pre-regulator prototype is constructed to verify the analysis and show the benefit of the pre-regulator operating with input current containing higher order harmonics.

• 전력전자학회논문지
• /
• 제14권6호
• /
• pp.496-503
• /
• 2009

이 논문은 새로운 인터리브 방식 삼상 절연형 고효율 부스트 컨버터를 제안한다. 이 컨버터는 삼상 전력변환 방식을 채택하여 보다 큰 전력전송 능력을 갖으며 각 상의 rms 전류값이 작으므로 전도손실도 작다. 이에 더하여, 삼상 부스트 컨버터의 인터리브 동작으로 인하여 입력 전류 리플이 줄어들고, 실효 동작 주파수의 증가로 필터소자의 크기가 작아져서 높은 전력밀도를 갖는다. 부스트 컨버터 출력의 각 상 전류는 제안된 3 상 PWM 구동방식에 따라 전류 연속모드로 동작하여 3 상 변압기로 통합된다. 이 컨버터는 전도손실이 작아 96% 이상의 효율로 동작하며 능동클램프의 작용으로 스위칭 손실도 역시 작다. 제안된 컨버터와 PWM 구동방식을 분석 및 시뮬레이션 하고 하드웨어로 제작하였다. 제작된 시제품을 500 W 급으로 실험하여 모든 설계검증 및 해석을 실시하였다.

• 전력전자학회논문지
• /
• 제18권4호
• /
• pp.297-304
• /
• 2013

This paper presents a improved control technique to overcome disadvantage when the inductor current of boost converter in PV system becomes DCM(Discontinuous Conduction Mode) due to the low insolation. MPPT(Maximum Power Point Tracking) output reference voltage could not be exactly followed by conventional dual-loop PI control method used typically because of the error between the actual current and measured current. Therefore, in this paper, Hybrid controller that changes the control method in DCM and CCM(Continuous Conduction Mode), and single state feedback controller are used to compensate that problem. The proposed control technique was verified by simulation using PSIM 9.0 and experiments.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 B
• /
• pp.1120-1122
• /
• 2002

Switching power supply are widely used in many industrial field. Power factor improvement and harmonic reduction technique is very important in switching power supply. The power factor correction (PFC) circuit using boost converter used in input of power source is studied in this paper. It is analyzed distortional situations and harmonics of input currents that presented at continuous conduction mode(CCM) of boost PFC circuit. It is done simulations of harmonics distribution according to load variation by using PSPICE and MATLAB. From the actual experiment of boost PFC circuit the validity of the analysis is confirmed.

• Journal of Power Electronics
• /
• 제15권3호
• /
• pp.644-651
• /
• 2015

This paper introduces a novel digital one cycle control (DOCC) boost power factor correction (PFC) converter. The proposed PFC converter realizes the FPGA-based DOCC control approach for single-phase PFC rectifiers without input voltage sensing or a complicated two-loop compensation design. It can also achieve a high power factor and the operation of low harmonic input current ingredients over universal loads in continuous conduction mode. The trailing triangle modulation adopted in this approach makes the acquisition of the average input current an easy process. The controller implementation is based on a boost topology power circuit with low speed, low-resolution A/D converters, and economical FPGA development board. Experimental results demonstrate that the proposed PFC rectifier can obtain a PF value of up to 0.999 and a minimum THD of at least 1.9% using a 120W prototype.