At power supply

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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)

    ppt21p trada85 18-01-2013 25 7   Download

  • 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

  • As a young teenager raised until 1964 in Casablanca, Morocco (a former French colony), I always dreamed of having an electric guitar. Influenced by the success of such groups as The Ventures, The Shadows (the British equivalent of The Ventures), and, later, The Beatles, I thought that I too could one day perform on stage. Fender guitars were my favorite, but since I could not afford even the cheapest model, I would try to console myself by admiring the many exorbitantly priced models displayed at a well-known music store...

    pdf235p aries23 29-09-2012 54 24   Download

  • There is an upward trend that human activities involve more electric power nowadays and for years to come. And we will soon be facing shortage of electricity supply if we rely solely on non-renewable power generation from fossil fuels such as coals. Renewable energy generation has proven effective in meeting the demand.

    pdf157p namde01 10-04-2013 53 10   Download

  • Energy efficiency is finally a common sense term. Nowadays almost everyone knows that using energy more efficiently saves money, reduces the emissions of greenhouse gasses and lowers dependence on imported fossil fuels. We are living in a fossil age at the peak of its strength. Competition for securing resources for fuelling economic development is increasing, price of fuels will increase while availability of would gradually decline.

    pdf0p orchid_1 25-09-2012 24 3   Download

  • Every employee has a story at Cummins Power Generation. Some are stories of coming to work with a parent when they were young, becoming employees themselves, then watching their children as they carry on the legacy. Others tell of starting at a distributorship and moving on to one of the many Cummins Power Generation offices located around the world. Some tell of starting at a regional office, before moving to global headquarters. Others talk of their days as customers working for utility companies.

    pdf20p possibletb 29-11-2012 26 3   Download

  • Khuyếch đại công suất âm thanh 4W-8W dùng TDA2005 Power Supply 9–18V at 1–2 A 8 W RMS/ch. at 2ohm 16V DC supply. 6W RMS/ch.at 4ohm 16V DC supply 4W RMS/ch.at 4ohm 12V DC supply 80 dBA. ~160 mV for full output ~31 dB maximum. C7-11=2200uF 16V C8-12=220uF 25V IC1=TDA2005 J1=2 Pole Terminal Block J2-3=3 Pole Terminal Block : MKð âm thanh 60W dùng TDA7294 Input sensitivity Input impedance Frequency response Slew rate Output power S/N ratio THD (40W into 8W) Power Supply R1=180ohm R2-3-5=10Kohm 1.3V (50W into 8W) 10K 15Hz - 100kHz 10V/uS 50W into 8W (0.

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  • Operating / Parts Information You must be familiar with the operation of this machine before you attempt to troubleshoot or make any repairs to it. Basic operating and maintenance procedures are described in the Operator’s Manual supplied with the machine. Keep a copy of it with the machine at all times. Use the separate Parts Book supplied with the machine to order replacement parts. If either of the documents becomes lost, please contact Wacker Corporation to order a replacement.

    pdf59p hiruscar 13-10-2010 78 27   Download

  • For this lab, you will need to compile power supply information as well as test procedures. Observe various types of power supply form factors and characteristics. If at any time you are unsure of the procedure, ask your instructor.

    pdf4p laquang 03-09-2009 120 17   Download

  • If each voltage is connected to a circuit with the same power factor and the three currents return along the same conductor, then the vector sum of the three return currents is zero. Thus instead of three full sized return cables, only one of smaller size is needed. If none of the load is single phase, then the neutral is not needed at all. High voltage supplies are nearly always three phase without a neutral conductor. There is a great economy in distribution costs if the electricity can be supplied in three phases. ...

    pdf0p namde01 11-04-2013 32 8   Download

  • These power ratings and currents are given for an ambient temperature of 50°C (122°F) at the factory-set switching frequency, used in continuous operation (factory-set switching frequency of 4 kHz for ATV71H 037M3 to D15M3X and 2.5 kHz for ATV71H D18M3X to D45M3X). Above this factory setting, the drive will reduce the switching frequency automatically in the event of excessive temperature rise. For continuous operation above the factory setting, derating must be applied to the nominal drive current in accordance with the curves on page 14.

    pdf49p ducthaobg83 25-09-2012 47 7   Download

  • Automatic Voltage Regulator adjusts the excitation so that at the system design power factor, the voltage is correct whatever the current. If however it adjusts the excitation to give the correct voltage at other power factors, then two machines will not run in parallel. One can supply a huge leading current and the other a huge lagging current. A “droop” is needed to give a lower voltage if the power factor lags by more than the system design. This is achieved by the compounding. Faulty Compounding causes unstable sharing of kVAr which can be quite violent....

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  • The Soneplex E1 Quad Loop Extender (EQLX) Four-Position Remote Chassis houses up to four EQLX modules and optional line termination unit, power supply unit, E1 alarm processor unit and E1 craft/performance monitoring module at the customer premises, for termination of two protected or unprotected optical E2 circuits (or up to eight E1s).

    pdf4p kieuoanh 11-08-2009 74 6   Download

  • ADC’s solution for media conversion at the work area is simple, uncluttered and cost-effective. Traditional solutions typically consist of an outlet optical interface, fiber jumper for connection to the media converter, a media converter on floor or desk, and a power supply that plugs in to a wall outlet. Unlike the cluttered approach, the ADC work area solution consists of two simple components: • An integrated media converter with conversion circuitry behind the faceplate.

    pdf4p thuyvan 13-08-2009 51 5   Download

  • Approximately 860 utilities, or more than 25% of utilities nationally, offer green power programs to customers. These programs allow customers to purchase some portion of their power supply as renewable energy—almost always at a higher price—or to contribute funds for the utility to invest in renewable energy development, such as solar installations at local schools. The term “green pricing” is typically used to refer to these utility programs offered in regulated or noncompetitive electricity markets.

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  • Coincidentally, in the case of the aforementioned regulations a STAG (STeam And Gas) cycle qualification is/was to provide about 6% of its steam generation to process. At this operating condition, the overall performance approaches that of a conventional STAG power generation cycle. Later in this paper, tables are provided that define GE’s gas turbine and gas engine product characteristics, which in turn illustrate the wide application range and flexibility of these products to support cogeneration applications.

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  • Finally, electromagnetic bearings involve complex design problems to ensure that the heavy spindle, with its high inertia, does not fall and damage the magnetic bearing when power is shut off or momentarily discontinued. Therefore, a noninterrupted power supply is required to operate the magnetic bearing, even at no load or at shutdown conditions of the system. In order to secure safe operation in case of accidental power failure or support of the rotor during shutdown of the machine, an auxiliary bearing is required. Rolling-element bearings with large clearance are commonly used.

    pdf20p tieulac 29-11-2010 40 3   Download

  • A synchronous machine is an ac rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature. The magnetic field created by the armature currents rotates at the same speed as that created by the field current on the rotor, which is rotating at the synchronous speed, and a steady torque results. Synchronous machines are commonly used as generators especially for large power systems, such as turbine generators and hydroelectric generators in the grid power supply. ...

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  • Ozone presents difficulties. It is an important issue which may grow in importance in the future if, as anticipated, concentrations rise, but the only acceptable way of monitoring it at remote locations, without a power supply, is diffusion tubes. These have been used in the ICP Forests Level 2 programme, but do not give values for peak ozone incidents, which are believed to cause visible ozone symptoms.

    pdf69p saimatkhauroi 01-02-2013 12 2   Download

  • This is a simple unipolar stepper board that can control stepper motors rated to 30VDC. The FET drivers are rated at 50A, but in practicality this board should not be used with motors anywhere near that current for several reasons. The power supply voltage, heat sinks and cooling used for the FET’s of your own application play an extremely important part in making that determination. The FET package is designed for 50 Watts of dissipative power. If you’re not wise in electronics, the board should be built in stages and tested during each stage to eliminate problems....

    pdf7p dotho1992 20-08-2013 24 1   Download

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