• Title/Summary/Keyword: SMPS(Switched Mode Power Supply)

Search Result 35, Processing Time 0.023 seconds

Development of the SMPS Power Module for the Medical Kit (SMPS방식을 적용한 의료기기용 전원모듈 개발)

  • Lee, Sangsik;Lee, Kiyoung
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
    • /
    • v.2 no.1
    • /
    • pp.11-15
    • /
    • 2009
  • In this study, we have developed the SMPS(Switched-mode power supply) power module for the medical kit. It is used the medical kit for improved supplying power better than the existing power module in performance, safety and reliability. The developed SMPS(Switched-mode power supply) is composed of the three fundamental electronic circuits, first one is for converting AC power to DC power, second one is for converting to high frequency, and the other is for absorbing noise frequency and preventing malfunction. It is possible for developed SMPS module to enlarge applications for PC, home appliances, switchboard as well as medical instruments.

  • PDF

Direct Single-stage Power Converter with Power Factor Improvement for Switched Mode Power Supply

  • Kalpana, R.;Singh, Bhim;Bhuvaneswari, G.
    • Journal of Electrical Engineering and Technology
    • /
    • v.5 no.3
    • /
    • pp.468-476
    • /
    • 2010
  • This paper presents a direct single-stage power converter using single-phase isolated full-bridge converter modules, with inherent power factor correction (PFC) for a 12 kW switched mode power supply (SMPS). The advantages of the proposed converter are its simple control strategy, reduction in number of conversion stage, low input line current harmonics, and improvement in power factor. Analysis of the single-stage converter is carried out in continuous conduction mode of operation. Steady-state analysis of the proposed converter is conducted to obtain converter parameters. A systematic design procedure is also presented for a 12k W converter with a design example. The effect of load variation on SMPS is also studied in order to demonstrate the effectiveness of the proposed converter for the complete range of load conditions. A set of power quality indices on input ac mains for an SMPS fed from a single-stage converter is also presented for easy comparison of their performance.

Optimal Circuit Design through Snubber Circuit Analysis (스너버(Snubber) 회로 분석을 통한 회로의 최적설계)

  • Yongho Yoon
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.23 no.4
    • /
    • pp.137-142
    • /
    • 2023
  • When designing a SMPS(Switched Mode Power Supply) circuit, a part that is easily overlooked without special consideration is a snubber circuit. However, the performance degradation of the SMPS due to the snubber circuit and the effect on the entire SET cannot be ignored. In addition, a snubber circuit is added to both ends of the switch to protect the device from peak voltage and current during switching and to reduce loss during on/off switching. Therefore, in this paper, for a sufficient understanding of snubber circuits, theoretical analysis and experimental formulas that can be applied by designers during actual circuit design are arranged to promote optimization of snubber circuits.

Development of a 150W Switched Mode Power Supply operates at -40℃ (-40℃에서 동작하는 150W급 SMPS 개발)

  • Park, Sung-Il;Kim, Sung-Soo
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.13 no.1
    • /
    • pp.85-92
    • /
    • 2018
  • In this paper, we designed a 150W LED lighting SMPS circuit operating at $-40^{\circ}C$. We designed a 150W LED lighting constant current circuit for the characteristics of the SMPS and fabricated and measured. The operating temperature range for a 150W LED lighting SMPS circuit is -40 to $70^{\circ}C$ and SMPS predicted life was 1.29-2.25 years based on 24 hours. The high acceleration life test and EMI test confirmed no abnormality.

Noise Reduction of PDP Module (PDP 모듈의 소음 저감)

  • Choi, Soo-Yong;Lee, Seok-Yeong;Joo, Jae-Man;Kang, Jung-Hun;Oh, Sang-Kyoung
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2002.11b
    • /
    • pp.204-209
    • /
    • 2002
  • A PDP(Plasma Display Panel) module consists of a discharge panel, a SMPS(Switched Mode Power Supply) for power supply, driving boards for panel control, and a logic board. Driving boards supply high voltage pulses to induce glow discharge in the PDP panel. The electrical pulses excite the circuit elements and subsequently generate acoustic noises. The main sources of the noise in the circuit are the transformer of SMPS and the power MOSFET(Metal Oxide Semiconductor Field Effect Transistor) of driving boards, and the heat sinks often amplify the noise level. The reduction of the acoustic noises was achieved by modifying both the structural and circuit elements. The structural method was executed by the improvement of heat sinks. The optimization of SMPS and condensers was carried out for the circuit elements.

  • PDF

SMPS for Control Circuit of Electric Fork-lift Truck (전동지게차의 제어회로용 SMPS)

  • Kim, Chong-Chul;Shin, Jung-Mug;Lee, Byeong-Seok
    • Proceedings of the KIEE Conference
    • /
    • 2006.07b
    • /
    • pp.913-914
    • /
    • 2006
  • In industrial field, electric fork-lift has been mainly powered by batteries which are varied from DC 36V to 80V. Operating electric fork-lift truck depends on stable electric power supplies which are ensured by using Switched Mode Power Supply (SMPS). This paper presents design of SMPS for stable electric power supply. The SMPS has much strength such as high effectiveness, low cost and high stability of output voltage. At the same time, SMPS is small and multi output and has simple design of circuit.

  • PDF

On Teaching Switched Mode Power Supplies - A Converter with Limited Duty Cycle

  • Himmelstoss, Felix A.
    • Journal of Power Electronics
    • /
    • v.10 no.6
    • /
    • pp.667-672
    • /
    • 2010
  • A way how to teach a general understanding of switched mode power supplies (SMPS) is shown. A fourth order PWM DC-to-DC converter with limited duty cycle range is treated as an example and a survey over important data (maximum voltage and current ratings for the elements, rms- values for the semiconductor devices and a rough approximation of the losses) of the circuit is given. Furthermore, a converter model based on duty ratio averaging is established. Continuous mode of operation is used. The results make it possible to estimate the applicability of the given converter structure and offer sufficient material for the calculation, design, and analysis and give a better insight into switched mode energy conversion.

Fault Prognostics of a SMPS based on PCA-SVM (PCA-SVM 기반의 SMPS 고장예지에 관한 연구)

  • Yoo, Yeon-Su;Kim, Dong-Hyeon;Kim, Seol;Hur, Jang-Wook
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.19 no.9
    • /
    • pp.47-52
    • /
    • 2020
  • With the 4th industrial revolution, condition monitoring using machine learning techniques has become popular among researchers. An overload due to complex operations causes several irregularities in MOSFETs. This study investigated the acquired voltage to analyze the overcurrent effects on MOSFETs using a failure mode effect analysis (FMEA). The results indicated that the voltage pattern changes greatly when the current is beyond the threshold value. Several features were extracted from the collected voltage signals that indicate the health state of a switched-mode power supply (SMPS). Then, the data were reduced to a smaller sample space by using a principal component analysis (PCA). A robust machine learning algorithm, the support vector machine (SVM), was used to classify different health states of an SMPS, and the classification results are presented for different parameters. An SVM approach assisted by a PCA algorithm provides a strong fault diagnosis framework for an SMPS.

Development of Power Supply Unit for high power GTO driver (대용량 GTO 구동회로용 Power Supply Unit 개발)

  • Cha, J.D.;Yang, H.J.;Hong, S.W.;Lee, H.S.
    • Proceedings of the KIEE Conference
    • /
    • 1996.07a
    • /
    • pp.609-612
    • /
    • 1996
  • This paper describes a design and implementation of the practical SMPS(Switched Mode Power Supply) with multi-output independent regulation scheme. The designed SMPS is applied to the PSU(Power Supply Unit) of high power GTO drivers for a inverter system. In order to accomplish precise voltage regulations for both turn-on and turn-off bias voltages of the GTO driver, the conventional forward type PWM converter scheme is adopted with the Post Regulator using a Saturable Reactor. Analytic design criteria and control schemes are described for practical applications. Finally, the precise regulation of multi-output voltages is proved by experimental results.

  • PDF

Two-stage & Single-stage Power Factor Correction circuits for Single-phase Power source (단상전원에 적합한 단일단 및 2단 역률개선회로)

  • Kim Chert-Jin;Yoo Byeong-Kyu;Kim Choong-Sik;Kim Young-Tae
    • Proceedings of the KIEE Conference
    • /
    • summer
    • /
    • pp.1214-1216
    • /
    • 2004
  • Conventional Switched Mode Power Supplies(SMPS) with diode-capacitor rectifier have distorted input current waveform with high harmonic contents. Typically, these SMPS have a power factor lower than 0,65. To improve with this problem the power factor correction(PFC) circuit of power supplies has to be introduced. PFC circuit have tendency to be applied in new power supply designs. The input active power factor correction circuits can be implemented using either the two-stage or the single-stage approach. In this paper, the comparative analysis of power factor correction circuit using feedforward control with average current mode single-stage flyback method converter and two-stage converter which is combination of boost and flyback converter. The two prototypes of 50W were designed and tested a laboratory experimental. Also, the comparative analysis is confirmed by simulation and experimental results.

  • PDF