• Title/Summary/Keyword: High power module

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A High Data Rate, High Output Power 60 GHz OOK Modulator in 90 nm CMOS

  • Byeon, Chul Woo;Park, Chul Soon
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.17 no.3
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    • pp.341-346
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    • 2017
  • In this paper, we present a 60 GHz on-off keying (OOK) modulator in a 90 nm CMOS. The modulator employs a current-reuse technique and a switching modulation for low DC power dissipation, high on/off isolation, and high data rate. The measured gain of the modulator, on/off isolation, and output 1-dB compression point is 9.1 dB, 24.3 dB, and 5.1 dBm, respectively, at 60 GHz. The modulator consumes power consumption of 18 mW, and is capable of handling data rates of 8 Gb/s at bit error rate of less than $10^{-6}$ for $231^{-1}$ PRBS over a distance of 10-cm with an OOK receiver module.

Optimal Design of PV Module with Bypass Diode to Reduce Degradation due to Reverse Excess Current

  • Jung, Tae-Hee;Kang, Gi-Hwan;Ahn, Hyung-Keun
    • Transactions on Electrical and Electronic Materials
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    • v.15 no.5
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    • pp.279-283
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    • 2014
  • In this paper, we present an economical and practical standard to install a bypass diode in a thin-film PV module. This method helps to reduce heat generation and to prevent module degradation due to excess current from reverse bias. The experimental results confirm that for different numbers of solar cells, there is a relation between the excess reverse current and the degradation of solar cells in a-Si:H modules. The optimal number of solar cells that can be connected per bypass diode could be obtained through an analysis of the results to effectively suppress the degradation and to reduce the heat generated by the module. This technique could be expanded for use in high power crystalline Si PV modules.

Analysis of Maintenance Conditions for Small Photovoltaic Equipment (소형 태양광발전설비의 유지관리 실태 분석)

  • Kang, Seok-Hwa;Kim, Jae-Yeob
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.11a
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    • pp.115-116
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    • 2014
  • This study investigated power generation of photovoltaic equipment at detached houses. The study estimated monthly mean generation according to maintenance conditions that included module cleaning, inspection into generation, cleaning of module and photovoltaic generation. At analysis upon generation, households with periodical module cleaning and inspection into generation, clean module and good generation conditions had high generation. 20-years of PV equipment life varied much depending upon maintenance conditions. Users should keep module clean and inspect generation regularly and put PV equipment at the place with good solar radiation.

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Development of a Prototype Monitoring Module for Steel Bridge Repainting Robots (강교량 재도장 로봇의 모니터링 모듈 시제품 개발)

  • Seo, Myoung Kook;Lee, Ho Yeon;Park, Il Hwan;Chang, Byoung Ha
    • Journal of Drive and Control
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    • v.17 no.4
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    • pp.15-22
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    • 2020
  • With the need for efficient maintenance technology to reduce maintenance costs for steel bridges, repainting robots are being developed to automate the work in narrow and poor bridge spaces. The repainting robot is equipped with a blasting module to remove paint layers and contaminants. This study developed a prototype monitoring module to be mounted on the repainting robot. The monitoring module analyzes the condition of the painting surface through a camera installed in the front, guides the direction of movement of the robot, and provides the operator with a video to check the working status after blasting through a camera installed in the back. Various image visibility enhancement technologies were applied to the monitoring module to overcome worksite challenges where incomplete lighting and dust occurs.

Design and Implementation of High Efficiency Transceiver Module for Active Phased Arrays System of IMT-Advanced (IMT-Advanced 능동위상배열 시스템용 고효율 송수신 모듈 설계 및 구현)

  • Lee, Suk-Hui;Jang, Hong-Ju
    • Journal of the Institute of Electronics and Information Engineers
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    • v.51 no.7
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    • pp.26-36
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    • 2014
  • The needs of active phased arrays antenna system is getting more increased for IMT-Advanced system efficiency. The active phased array structure consists of lots of small transceivers and radiation elements to increase system efficiency. The minimized module of high efficiency transceiver is key for system implementation. The power amplifier of transmitter decides efficiency of base-station. In this paper, we design and implement minimized module of high efficiency transceiver for IMT-Advanced active phased array system. The temperature compensation circuit of transceiver reduces gain error and the analog pre-distorter of linearizer reduces implemented size. For minimal size and high efficiency, the implented power amplifier consist of GaN MMIC Doherty structure. The size of implemented module is $40mm{\times}90mm{\times}50mm$ and output power is 47.65 dBm at LTE band 7. The efficiency of power amplifier is 40.7% efficiency and ACLR compensation of linearizer is above 12dB at operating power level, 37dBm. The noise figure of transceiver is under 1.28 dB and amplitude error and phase error on 6 bit control is 0.38 dB and 2.77 degree respectively.

A Driving Scheme Using a Single Control Signal for a ZVT Voltage Driven Synchronous Buck Converter

  • Asghari, Amin;Farzanehfard, Hosein
    • Journal of Power Electronics
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    • v.14 no.2
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    • pp.217-225
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    • 2014
  • This paper deals with the optimization of the driving techniques for the ZVT synchronous buck converter proposed in [1]. Two new gate drive circuits are proposed to allow this converter to operate by only one control signal as a 12V voltage regulator module (VRM). Voltage-driven method is applied for the synchronous rectifier. In addition, the control signal drives the main and auxiliary switches by one driving circuit. Both of the circuits are supplied by the input voltage. As a result, no supply voltage is required. This approach decreases both the complexity and cost in converter hardware implementation and is suitable for practical applications. In addition, the proposed SR driving scheme can also be used for many high frequency resonant converters and some high frequency discontinuous current mode PWM circuits. The ZVT synchronous buck converter with new gate drive circuits is analyzed and the presented experimental results confirm the theoretical analysis.

Implementation of Brushless Linear Motor Drive using DSP (DSP를 이용한 브러쉬 없는 선형 모터 드라이브 구현)

  • Kim, Sang-U;Park, Jeong-Il;Lee, Gi-Dong;Lee, Seok-Gyu;Jeong, Jae-Han
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.8
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    • pp.155-160
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    • 2002
  • In this paper, a controller design for brushless linear motor is implemented. The designed controller is mainly composed of current, speed and position controller, which are carried out by the high-speed digital signal processor (DSP). In addition the PWM inverter is controlled by space voltage PWM method. This system is implemented by using 32-bit DSP (TMS320C31), a high-integrated logic device (EPM7192), and IPM (Intelligent Power Module) for compact and powerful system design. The experimental results show the effective performance of controller for the brushless linear motor.

Implementation of Brushless Linear Motor Driver (브러쉬없는 리니어 모터 드라이브 구현)

  • 김상우;박정일;이기동;정재한;서경열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.969-972
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    • 2000
  • In this paper, a controller design for brushless linear motor is proposed. The designed controller is mainly composed of speed and current controller, which are carried out by the high-speed digital signal processor(DSP). In addition the PWM inverter is controlled by space voltage PWM method. This system is implemented using by 32-bit DSP(TMS320C31), a high-integrated logic device(EPM7128), and IPM(Intelligent Power Module) for compact and powerful system design. The experimental results show the effective performance of controller for the brushless linear motor.

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A Study on the System Principle of PID Module Implementation (PID Module 구현 원리 시스템에 대한 연구)

  • 위성동;김태성;최창주;권병무
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1999.05a
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    • pp.183-192
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    • 1999
  • The derivative equation measured of a ${\Delta}MV=Kp*{(EVn-EVn-1)+\frac{1}{Ki/S}* EVn+(Kd/S)*(2PVn-1-PVn-PVn-1)}$ is used on the machine apparatus of industrial field, but this par doesn\`t able to educate now, because we didn\`t have the implementation device of PID module, so the principle implementation system of the PID Module is manufactured and developed. Through this system, the implementation system of PID Module is practiced with that the SV and the set of P, I, D is set on the derivative equation measured of PID. A things to be known of this experiment result is flow. 1)PID module is known that had to be used with the module of A/D and D/A. 2) In process of PV is approached to the SV to follow Kp, Ti and Td to cause a constant of set value on the $MVp=Kp*EV, MV=\frac{1}{Ki}{\int}EVdt, MVd=Td\frac{d}{dt}EV$, the variable rate of E and Kp, Td, Ti in that table 1 is analysed, is same as flow. (1)If Kp is high, PV is near fast to the SV, but Kp is small, PV is near slowly to the SV. (2)If Ki is shot, PV is close fast to the SV, but Ti is high, PV is close slowly to the SV (3)If Td is high, the variable rate of E press hardly when because it doesn\`t increase, but Td is small, the variable rate of E press not hardly, upper with 1), 2), PID module is supposed that be able to do the A/S and an implementation of that apparatus, and getting a success of aim that an engineer want, on control of temperature, tension, velocity, amount of flow, power of wind end so on, to get the principle of automatic implementation in industrial field with cooperation of A/D and D/A module.

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Circulating Current Reduction Method Using High Frequency Voltage Compensation in Asynchronous Carriers for Modular Scalable Inverter System (Modular Scalable Inverter System에서 캐리어 비동기시 고주파 전압 보상을 이용한 순환전류 저감 기법)

  • Choi, Seung-Yeon;Kang, Shin-Won;Im, Jun-Hyuk;Kim, Rae-Young
    • The Transactions of the Korean Institute of Power Electronics
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    • v.24 no.2
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    • pp.71-77
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    • 2019
  • This study proposes a circulating current reduction method that uses high-frequency voltage compensation when carrier phase difference occurs between two inverters in MSIS. In MSIS, inverters are configured in parallel to increase power capacity and to increase efficiency by using inverters only as needed. However, in the parallel inverter structure, circulating current is inevitably generated. Circulating current increases the stress on the switch, adversely affects the current control performance, and renders load sharing difficult. The proposed method compensates for the output voltage reference of the slave module by using the high-frequency voltage so that the switching pattern of each module is matched even in asynchronous carriers. The validity of the proposed method is verified by simulations and experiments with 600 W IPMSM.