Xem 1-20 trên 178 kết quả Power supply
  • Solar electric plants shall be understood to be photovoltaic energy converters that are able to self-sufficiently satisfy a mean energy demand over a significant period of time, be it an appliance that is permanently hooked up or just for sporadic power supply of appliances. Such plants have in common that their input and output quantities fluctuate widely. They can therefore only be dimensioned on the basis of a mean value and are not able to satisfy this demand without the possibility to store energy. ...

    pdf15p congdat261 08-11-2010 99 27   Download

  • Tham khảo tài liệu 'chapter 18: power supplies', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • AT Power supply Dây dẫn 1 2 3 4 5   Giắc cắm P8 PG (dây cam) +5V (dây đỏ)  +12 V (dây vàng) ­12V (dây xanh) Tiếp đất (dây đen)   Tiếp đất (dây đen) Giắc cắm P9 Tiếp đất (dây đen)

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  • Not many technical books continue to be in high demand well beyond the natural life of their author. It speaks well to the excellent work done by Abraham Pressman that his book on switching power supply design, first published in 1977, still enjoys brisk sales some eight years after his demise at the age of 86. He leaves us a valuable legacy, well proven by the test of time.

    pdf880p nguyenminhnghia8386 26-09-2011 98 46   Download

  • Abstract: Industry standard for the control of switch mode power supply (SMPS) systems has been analog control. Now with the advent of high speed, lower cost digital signal processing (DSP) ICs, digital control there has been an increased interest in digital control of SMPS. The Power Electronics & Power Quality Laboratory of Texas A&M University is currently exploring several implementation aspects of digital control of power factor correction (PFC) stage of SMPS. Two low cost digital controllers: TMS320LF2407 and ST52x420 are evaluated for implementing PFC function.

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  • Digital Control of Switching Power Supply - Power Factor Correction Stage

    pdf11p hoang1 02-11-2009 111 28   Download

  • There are many types of power supply. Most are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronics circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular fun

    pdf53p vankent 13-07-2010 71 18   Download

  • .UPS (Uninterruptible Power Supply) hay bộ lưu điện là thiết bị có thể cung cấp điện năng trong một khoảng thời gian tương ứng với công suất thiết kế nhằm duy trì hoạt động của máy tính hoặc thiết bị điện khi điện lưới gặp sự cố. Bài viết giới thiệu với bạn đọc khái niệm, cơ chế hoạt động của hai dòng sản phẩm UPS Offline và Online nhằm giúp bạn đọc có sự lựa chọn phù hợp....

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  • Nowadays we assist to the increasing of devices and equipments connected to power systems (non-linear loads, industrial rectifiers and inverters, solid-state switching devices, computers, peripheral devices etc). Hence, the parameters of the power supply should be accurately estimated and monitorized. For this purpose have been proposed power quality monitoring systems that are abble to automatically detect and classify disturbances.

    pdf300p haiduong_1 24-04-2013 69 16   Download

  • Today the most important electrochemical storage systems for stationary applications are the lead-acid and the nickel/cadmium systems. Both of them have advantages and disadvantages which carefully have to be considered for best selection. Batteries for telecom applications are specially designed for long service life and hours of discharging time. Batteries for UPS applications are designed for discharges with high current over short times (minutes). Special battery constructions are offered for the different requirements. ...

    pdf27p congdat261 08-11-2010 45 9   Download

  • Although relatively unknown some years ago, driverless industrial trucks have come to occupy an important position within the framework of highly organized systems of driverless transport (DTS). The essential factors contributing to this fact are without doubt on the one hand the increased need for automation in industry, and on the other hand the high degree of flexibility afforded by these appliances.

    pdf17p congdat261 08-11-2010 59 8   Download

  • Ebook "Step by Step Guide Book on Home Wiring" referred to the contents of your home electrical system how the works, how to turn off the main power supply, the three Ways to get power to your new wiring job, how the ground wire plastic boxes print works, all about electric wire, how to use screw terminals and wirenuts, how to install wiring in new walls and petitions, ... Invite you to consult.

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  • In this lab, identify the type of computer case to be used, the form factor of the unit, and the voltage selector switch on the power supply. The inventory of all the components that will be installed in the computer case will also be discussed. Finally, motherboard standoffs will be installed to prepare the case for the installation of the motherboard.

    pdf4p laquang 03-09-2009 64 6   Download

  • Tài liệu Hướng dẫn sử dụng Board Test nguồn Power Supply tester v2.0 Model: PT 1114 được thực hiện nhằm cung cấp cho người học các kiến thức về cấu tạo, chức năng, hoạt động của Board Test nguồn Power Supply tester v2.0 Model: PT 1114. Đây là tài liệu tham khảo hữu ích cho các bạn.

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  • The information contained in Ebook Simatic S7-300 S7-300 Module data can be used as a reference to operating, to functions, and to the technical data of the signal modules, power supply modules and interface modules of the s7 300.

    pdf676p nguyenthai_thinh 07-10-2014 12 3   Download

  • Chapter 5, "Power supplies", covers power supplies, including how they work and how to troubleshoot problems. The power supply is an often-underrated part of a computer. Many transient problems can be related to a faulty power supply or to poor electrical supply from the local provider. Electronic components require a steady electrical current, free of surges or drops. The power supply is responsible for providing clean, constant current.

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  • Power electronics is the technology of processing and controlling the flow of electric energy by supplying voltages and currents in a form that is optimally suited to the end-user’s requirements [1].Atypical block diagram is given in Figure 1.1 [2]. The input power can be either AC and DC sources. A general example is one in which the AC input power is from the electric utility. The output power to the load can be either AC and DC voltages. The power processor in the block diagram is usually called a converter. Conversion technologies are used to construct converters.

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  • A power series in x, or in x – a, which is convergent in the interval –1

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  • General-Purpose Sliding-Mode Control Implementation Conclusions Switch-mode power supplies represent a particular class of variable structure systems (VSS), and they can take advantage of nonlinear control techniques

    pdf23p daohuongthon 22-01-2010 58 20   Download

  • With the proliferation of electronic loads such as computers, the incidence of power quality-related problems is growing. As a result, the uninterruptible power supply (UPS) market has grown significantly in the last few years. What follows is an overview of UPS functions and descriptions of common types of UPSs and backup power sources. 16.1 UPS Functions The primary purpose of a UPS is to provide conditioned, continuous power to its load. Another UPS function that is of growing importance in today’s market is system integration, or the...

    pdf10p daohuongthon 22-01-2010 80 19   Download

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