• Title, Summary, Keyword: Switching Cost

Search Result 775, Processing Time 0.053 seconds

Power Factor Correction Improvement and Total Harmonic Distortion Reducing for Panel's Air-conditioner (패널용 에어컨의 역률 개선 및 고조파 저감)

  • Park, S.W.;Park, J.W.;Lee, H.W.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.258-261
    • /
    • 2001
  • High Power factor Active Filter converter is used for Inverter Air conditioner power supply to meet IEC standard. In the active filter topology for power factor, extra switch just control the input current indirectly to meet the IEC standard for reducing the cost and size. In this paper, low cost converter was suggested by simulation using extra switch which auxiliary pulse is inserted and quasi resonant soft switching topology control is adapted for panel's inverter air conditioner converter Inserting auxiliary Pulse method to the extra switch has the benefit of reducing THD by low cost input control circuit. And also quasi resonant soft switching topology can reduce switching loss. So both technical is suitable for Panel's Air conditioner.

  • PDF

Dual Path Magnetic-Coupled AC-PDP Sustain Driver with Low Switching Loss

  • Lee Jun-Young
    • Journal of Power Electronics
    • /
    • v.6 no.3
    • /
    • pp.205-213
    • /
    • 2006
  • A cost-effective magnetic-coupled AC-PDP sustain driver with low switching loss is proposed. The transformer reduces current stress in the energy recovery switches which affects circuit cost and reliability. The turns-ratio can be used to adjust the sustain pulse slopes which affect gas discharge uniformity. Dividing the recovery paths prevents abrupt changes in the output capacitance and thereby switching losses of the recovery switches is reduced. In addition, the proposed circuit has a more simple structure because it does not use the recovery path diodes which also afford a large recovery current. By reducing the current stress and device count in the energy recovery circuit, the proposed driver may have decreased circuit cost and improved circuit reliability.

Hybrid Cascaded MLI topology using Ternary Voltage Progression Technique with Multicarrier Strategy

  • Venugopal, Jamuna;Subarnan, Gayathri Monicka
    • Journal of Electrical Engineering and Technology
    • /
    • v.10 no.4
    • /
    • pp.1610-1620
    • /
    • 2015
  • A major problem in conventional multilevel inverter is that an increase in power semiconductor switches causes an increase in cost and switching losses of the inverter. The multicarrier strategy adopted for the multilevel inverters has become more popular due to reduced cost, lower harmonic distortion, and higher voltage capability than the conventional switching strategy applied to inverters. Various topologies and modulation strategies have been reported for utility and drive applications. Level shifted based pulse width modulation techniques are proposed to investigate the performance of the multilevel inverter. The proposed work focuses on reducing the utilized switches so that the cost and the switching losses of the inverter do not go up and the consistent efficiency could be achieved. This paper presents the detailed analysis of these topologies. The analysis is based on the number of switches, DC sources, output level, maximum voltage, and the efficiency. As an illustration, single phase cascaded multilevel inverter topologies are simulated using MATLAB/SIMULINK and the experimental results demonstrate the viability of these inverters.

A Study on the difference in Customer's buying decision on Smartphone among products types (제품 유형별 소비자의 스마트폰 구매결정 차이 연구)

  • Kang, Byung Goo;Lee, Han Won;Han, Pil Koo;Jun, Byoung Ho
    • Journal of Korea Society of Digital Industry and Information Management
    • /
    • v.7 no.1
    • /
    • pp.111-125
    • /
    • 2011
  • Smartphone is becoming as a core device of mobile environment. The purpose of this study is to investigate the factors affecting customer's buying decision on smartphone. Based on prior studies and cases, this study identifies network effect, switching cost, function, design, brand, after service, price as affecting factors of customer's buying decision on smartphone. It also aims to investigate the relationship between network effect/switching cost and re-purchasing. Result shows that network effect brand, after service are significantly related to customer's buying decision on smartphone by device types, but switching cost, function, design, price are not. Network effect also was found to be significantly related to the re-purchasing. The result of this study may provide a guideline of supply strategy with smartphone suppliers.

Design Considerations of Asymmetric Half-Bridge for Capacitive Wireless Power Transmission

  • Truong, Chanh Tin;Choi, Sung-Jin
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.139-141
    • /
    • 2019
  • Capacitive power transfer has an advantage in the simplicity of the energy link structure. So, the conventional phase -shift full bridge sometime is not always the best choice because of its complexity and high cost. On the other hand, the link capacitance is usually very low and requires high-frequency operation, but, the series resonant converter loses zero-voltage switching feature in the light load condition, which makes the switching loss high especially in CPT system. The paper proposes a new low-cost topology based on asymmetric half-bridge to achieve simplicity as well as wide zero voltage switching range. The design procedure is presented, and circuit operations are analyzed and verified by simulation.

  • PDF

An Inherent Zero-Voltage and Zero-Current-Switching Full-Bridge Converter with No Additional Auxiliary Circuits

  • Wang, Jianhua;Ji, Baojian;Wang, Hongbo;Chen, Naifu;You, Jun
    • Journal of Power Electronics
    • /
    • v.15 no.3
    • /
    • pp.610-620
    • /
    • 2015
  • An inherent zero-voltage and zero-current-switching phase-shifted full-bridge converter with reverse-blocking insulated-gate bipolar transistor (IGBT) or non-punch-through IGBT is proposed in this paper. This converter not only ensures that the switches in the lagging leg works at zero-current switching, but also minimizes circulating conduction loss without any additional auxiliary circuits. A 1.2 kW hardware prototype is designed, fabricated, and tested to verify the proposed topology. The control loop design procedures with small-signal models are also presented. A simple, low-cost, and robust democratic current-sharing circuit is also introduced and verified in this study. The proposed converter is a suitable alternative for compact, cost-effective applications with high-voltage input.

LED Driver by the Low Cost DSP (저가형 DSP를 이용한 LED 구동회로)

  • Song, Jae-Wook;Yoo, Jin-Wan;Park, Chong-Yeun
    • Journal of Industrial Technology
    • /
    • v.32 no.A
    • /
    • pp.103-107
    • /
    • 2012
  • Due to improvement of the semiconductor technology, the LED replaces the conventional lighting source and LED drivers have been studied and developed. The LED is driven by the constant current control method according to its characteristics. For the constant current control method, the linear regulator and the switching regulator is used. The switching regulator is usually used to LED drivers because it has specific characteristics as the wide input dynamic range and the high efficiency. In this paper, we have described the principle and the implement of the switching regulator, using the drive IC and the low cost DSP chip. Also, both methods have been implemented and its electrical characteristics had almost same experimental results in the steady state and the transient state.

  • PDF

The Relationships of On-line Game Attributes, Customer Satisfaction, Switching Barriers and Customer Loyalty -Mediating Effects of Switching Costs and Attractiveness of Alternatives- (온라인 게임의 중요속성, 만족, 전환장벽 및 고객충성도의 관계 -전환비용과 대안의 매력도의 매개역할-)

  • Fan, Qing-Ji;Kim, Won-Kyum
    • The Journal of the Korea Contents Association
    • /
    • v.9 no.12
    • /
    • pp.235-244
    • /
    • 2009
  • The object of this research is to analyze the impact of the four dimensions of on-line game attributes, challenge, social interaction, entertainment and actuality, on customer satisfaction and loyalty. At the same time, mediating effects of switching barriers, such as switching cost and attractiveness of alternatives on the relationships between customer satisfaction and customer loyalty are also analyzed. The results showed that the challenge, social interaction, entertainment had significant effects on customer satisfaction. Customer satisfaction also effected customer loyalty. Another important result is that switching cost and attractiveness of alternatives played an intermediating role between customer satisfaction and customer loyalty.

Discontinuous PWM Scheme for Switching Losses Reduction in Modular Multilevel Converters

  • Jeong, Min-Gyo;Kim, Seok-Min;Lee, June-Seok;Lee, Kyo-Beum
    • Journal of Power Electronics
    • /
    • v.17 no.6
    • /
    • pp.1490-1499
    • /
    • 2017
  • The modular multilevel converter (MMC) is generally considered to be a promising topology for medium-voltage and high-voltage applications. However, in order to apply it to high-power applications, a huge number of switching devices is essential. The numerous switching devices lead to considerable switching losses, high cost and a larger heat sink for each of the switching device. In order to reduce the switching losses of a MMC, this paper analyzes the performance of the conventional discontinuous pulse-width modulation (DPWM) method and its efficiency. In addition, it proposes a modified novel DPWM method for advanced switching losses reduction. The novel DPWM scheme includes an additional rotation method for voltage-balancing and power distribution among sub modules (SMs). Simulation and experimental results verify the effectiveness and performance of the proposed modulation method in terms of its switching losses reduction capability.

An Empirical Study on Factors Influencing a Consumer's Switching Behavioral Intention in the Internet Shopping Mall Environment (인터넷 쇼핑몰에서 고객 전환의도에 영향을 미치는 요인에 관한 연구)

  • Kim, Jong Uk;Park, Seong-Taek
    • Journal of Digital Convergence
    • /
    • v.11 no.1
    • /
    • pp.199-209
    • /
    • 2013
  • This study empirically investigates how the switching barriers influence the consumer's perceived intention to change his or her current favorite internet shopping mall. Drawing from switching cost theory, variables pertaining to trust, shopping mall service quality, product price, web page quality, switching barriers were examined to examine the consumer's behavioral intention to switch to another shopping mall. The interaction effect of consumer involvement was also included in the research model. The results of the study report that customer satisfaction and switching cost influence shopping switching intention, while the effect of attractiveness of the shopping mall was not significant in the statistical analysis. Furthermore, a moderating effect of consumer involvement was not found significant in the PLS analysis. The study demonstrates the shopping mall owners try to increase the customer's overall satisfaction and raise the switching barrier by providing mileage advantages, for instance.