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Topic: Ground level power supply

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	Power Supply Glossary - Condor DC Power, Inc. (Site not responding. Last check: 2007-11-03)
		The temperature of the environment in which the power supply is operating, e.g., "room temperature." For forced air-cooled units, the ambient temperature is measured at the air inlet.
		A reduction in the power output capacity of a power supply due to its external environment such as altitude, airflow and ambient temperature.
		In power supplies, this is the excursion of the output voltage and the time it takes to recover from a step change in the output load or the input voltage.
	www.condorpower.com /products/glossary.html (1509 words)

	Leach Amp Power Supply (Site not responding. Last check: 2007-11-03)
		The power supply uses a transformer with a center tapped secondary and a bridge rectifier to produce bipolar supply voltages.
		The approximate dc voltage on each side of the power supply is given by the ac rms secondary transformer rating divided by 1.414 minus 0.5.
		With these transformers, the power supply puts out about +58 V and -58 V. With 12,000 uF filter capacitors, the energy stored in the power supply is about 40 joules.
	users.ece.gatech.edu /~mleach/lowtim/pwrsply.html (618 words)

	Power Supply
		The power supply is usually a silvery box at one corner of your case.
		It takes power from a power cord and has a connection to apply monitor power for those monitors having the correct kind of power cord.
		Power is provided through wires and connectors to the mother board and disk drives.
	home.sprynet.com /~shawn_h/ps.htm (750 words)

	Robot Building Lessons
		It is a problem when a wire or trace is connected to a power source like a battery or a power supply and then that wire is split and the power goes off to the electronics and then the motor.
		In this case the power supply has additional connections so that the voltage regulator can sense the voltage at the load instead of the source and compensate for the voltage drop caused by the cable.
		When isolated supplies are used with no common ground, optoisolators and the like are the only way to get signals from systems powered with one supply to systems powered by the other.
	www-2.cs.cmu.edu /~chuck/infopg/roboinfo.html (2640 words)

	Appendix C. Power Supply
		Power is supplied to the BL2000 via a mini phone jack located at J7 or through the screw terminal strip, header J2.
		Power to the analog circuits is provided by way of a two-stage low-pass filter, which isolates the analog section from digital noise generated by the other components.
		Power to the SRAM and the real-time clock (VRAM) is provided by two different sources, depending on whether the main part of the BL2000 is powered or not.
	www.zworld.com /documentation/docs/manuals/BL2000/cpower.htm (1460 words)

	Power Supply Design \| RF Design - power supply design for WiFi transceiver - power supply design
		By tying all of the supply voltages together at a large plane, it is impossible to prevent noise transfer from one pin to another.
		After grounding arrangements are settled, it is important to route all signal ground returns to the solid ground plane in the shortest path possible.
		When the transmit output power and spectral mask performance is “linearity limited,” we are in a position to trade-off current for linearity and output power, which is the desired scenario.
	rfdesign.com /mag/radio_power_supply_ground (2565 words)

	PcMus: Ground Loops and Power in Studios.
		If all your grounding is right inside the computer but your power supply is not grounded properly then going between PCI cards will be OK but patching your computer into external gear like a mixer will cause a ground loop and induce noise.
		Power supplies in computer are generally quite cheap and nasty, but the problem could be else where like a poor motherboard design.
		Since the ground is not connected in the power supply you cannot have ground loop problems.
	www.pcmus.com /power-grounding.htm (2309 words)

	CATOCTIN POWER :: Project FAQs
		These are levels of emissions in the ambient air believed to protect public health and the environment, taking into account sensitive receptors such as children and the elderly, with an adequate margin of protection.
		In a power plant, humidity is mostly produced by two methods: the combustion of fuel and the use of water to cool the plant.
		Humidity levels right next to the cooling tower may be slightly higher than further away, but this higher humidity is quickly absorbed into the environment and reaches equilibrium with the humidity in the nearby air.
	www.catoctinpower.com /faqs_air.htm (1448 words)

	Satellite Power System - Abstract
		Power conditioning devices then send the electricity to a laser, which transmits the power to the surface of the Earth.
		People living near a ground station may be more inclined to accept the SPS if they learn of the economic benefits to their community that the SPS might have, like providing more jobs and increasing economic activity in the area.
		Furthermore, because SPS power requirements will be different when the satellite is in shadow, the power distribution computer will also serve as a power manager by shutting down unnecessary systems during shadow times and restarting them after the system passes out of shadow.
	www.tsgc.utexas.edu /archive/design/power.html (3768 words)

	ME 244L
		The connection to earth ground is usually made by connecting to a ground rod, a water pipe, or to a power-line common.
		These power supplies may have an adjustable voltage level, and this is established between the (+) and (-) terminal.
		If a circuit under test is powered by a floating supply and is to be monitored by an oscilloscope that has a ground clip that is earth grounded, the oscilloscope ground connection should always be attached to the test circuit common.
	www.me.utexas.edu /~lotario/me244L/leks/sigmeas/egroundsetc.html (813 words)

	Dual-mode vehicle - Wikipedia, the free encyclopedia
		A dual-mode vehicle is a vehicle that can run on power from two different sources, typically electricity from overhead lines or ground level power supply and in parallel or alternating from an internal combustion engine burning liquid fuels or gas.
		Dual-mode operation is useful mainly for big vehicles because of the costs of the electric power supply.
		The ground level power supply system is well known by children playing with cars at miniature racing tracks using vehicles with rubber tires and DC-power rails (which have also a guiding function).
	en.wikipedia.org /wiki/Dual-mode_vehicle (464 words)

	PC Power Supply
		If used as a power source for the micro and sub-micro servos, you must be careful not to drive the servo to either endpoint to avoid stripping the smaller gears in these units.
		Power supplies in today's computers are known as SWITCHMODE or Switching Mode power supplies and require a load to continue to operate after being switched on (the term switching mode actually applies to the technique of A/C to D/C conversion and not to the power up action).
		The wires remaining in the power supply should be left long and cut to length as needed.
	web2.murraystate.edu /andy.batts/ps/powersupply.htm (1862 words)

	Linear Power - PA2 Manual
		The maximum output level on the front fader and rear fader outputs is set by the volume control.
		The 5Vrms signal level was chosen by our engineers in order to provide your car audio system with excellent channel separation and great power supply noise isolation while still providing a high output signal level for driving the audiopath to your amplifiers.
		GROUND CONNECTION: Connect the fl wire labeled gnd on the top cover to the exact same location the head unit is connected to ground.
	www.linearpower.com /manuals/pa2.html (1459 words)

	High Voltage Isolated Power Sources (Site not responding. Last check: 2007-11-03)
		For example, a fiber optic transmitter at the HV level for waveforms to be received and measured or recorded by grounded instrumentation might be powered by an isolation transformer.
		The most popular models for low power instrumentation are 50 volt amps or 500 volt amps with 115V/230V primary to 115V/230V secondary and withstand isolation of 25KV RMS 1 minute and 60KV impulse.
		By use of a high voltage insulated coupling to isolate a motor at ground potential and a generator at high voltage, very low capacitance and very high voltage withstand isolation can be obtained.
	www.rossengineeringcorp.com /hv_isolated_power_sources.htm (310 words)

	Some Op Amp Audio Design Issues (Site not responding. Last check: 2007-11-03)
		With battery power, bipolar power generally means at least two batteries, although it is possible to create and use an intermediate reference level.
		When we have input signals moving through the power supply, that supply had better be very clean, and much cleaner than we might expect since op amps typically reject power supply noise.
		In the typical bipolar power design, the negative power supply filter capacitor is part of the input circuit.
	www.ciphersbyritter.com /RADELECT/PREOPAMP/OPAMPDSN.HTM (2493 words)

	PQ Corner - How to Avoid Common Mistakes in Power Conditioning
		When power quality problems cause high-technology systems to fail, the solution is usually the application of some form of power conditioning device.
		If it's too far from the load, the impedance of the power wiring between the conditioner and the computer will become problematic, and power that was noise-free at the output of the conditioner will become noisy again at the load.
		This is critical because SMPS consume power from the main in large gulps for short periods of time near the peak of sine-wave rotation.
	www.ecmweb.com /powerquality/electric_avoid_common_mistakes (1482 words)

	Kansas City Star \| 11/26/2006 \| Light rail proposal rides into unsettled territory (Site not responding. Last check: 2007-11-03)
		The measure calls for an in-ground power system that is now in use in only one city in the world.
		A system developed by Alstom, an international supplier of rail products and services, went into service in 2003 in a centuries-old part of Bordeaux, where unsightly wiring was prohibited because it might diminish the architectural beauty of the southern French city’s cathedrals and other historic buildings.
		Power to the conducting segments is triggered by coded radio dialogue between the train and the ground, and it only occurs when the segment is covered by the train so pedestrians aren’t electrocuted.
	www.kansascity.com /mld/kansascitystar/news/politics/16098324.htm (789 words)

	PIN power line power modem 212ALP replacement HA2400LP
		Power from the RS232 interface (TXD, RTS and DTR) activates the HideAway's RS232 drivers, the AT Command set controller and the optical relay that picks up the telephone line; Power from the telephone line then activates the data pump and ancillary telephone line components
		The heart of the HideAway's circuit is its power "scavenger" that derives power from two isolated sources: the telephone line and the RS-232 pins.
		This means circuits powered by 5 VDC are capable of driving RS232 circuits directly, however, the overall range that the RS232 signal may be transmitted/received may be dramatically reduced.
	www.arcelect.com /212ALP_pinpower_modem.htm (934 words)

	PJRC MP3 Player, Connecting the Board, Pinouts and Power Supply
		The DC power jack, located next to the 9 pin serial port connector is intended to be the main power input for the board.
		The external power supply must generate the 5 volts and 12 volts for the drive, and it must provide 5 volts and 3.3 volts to the MP3 player board.
		The 12 volt DC power is connected to the DC input jack, or the three pin connector.
	www.pjrc.com /tech/mp3/power.html (612 words)

	Power Supply Regulation (Site not responding. Last check: 2007-11-03)
		Significant power is dissipated within the linear regulator IC, as the converter is constantly on and conducting current.
		The clear advantage of switching regulators is efficiency, as minimal power is dissipated in the power path (FET switches) when the output supply voltage is sufficient for the load state.
		Because one inductor port is tied to common/ground, the other port is at a lower voltage level compared to common/ground, hence the negative output supply voltage levels across the output load.
	www.altera.com /support/devices/power/regulators/pow-regulators.html (969 words)

	Laser Power Supplies (Range in WATTS) - HiTek Power
		The Series CC1000 is a range of high performance, high reliability capacitor charger power supplies intended for use as a component power supply in medical environments.
		The PFC power factor corrector modules are designed to be used as a supply for DC/DC converters with 500W or 1000W of output power from a 100V AC input.
		HiTek Power has recognized that in today’s manufacturing world that many system assemblers are moving towards high level integration of their products.
	www.hitekpower.com /laserpower.htm (1294 words)

	Solar Power Supply Regulators and Controllers for Cathodic Protection at Remote Sites
		If there is a difference between the two, the power supply automatically adjusts its output to compensate for the difference.
		The Reduced Energy at Night (REN) power supply is designed to provide 100% of the daytime current rating during daytime solar energy periods and a minimum of 1/2 the daytime current rating of the power supply at night.
		CVO type power supplies were developed for use in areas where protection is needed at a constant level.
	www.farwestcorrosion.com /fwst/dcpower/solar02.htm (1015 words)

	Upgrading the Rhodes Chroma Power Supply
		It was an attempt to use a single-voltage power transformer to supply all of the various required supply voltages, trading off circuit complexity for a simpler transformer.
		The power-fail signal is generated in the power supply itself since the power supply will be the first to know when the power is applied or removed.
		The original Chroma power supply had four male Molex connectors soldered into the power supply pc board, and cables plugging into those ran to the I/O board, the Channel Motherboard and the EQ board.
	www.till.com /articles/ChromaPowerSupply (1478 words)

	Power supply
		Clean means that the voltage supplied is steady enough to meet the requirements of the using systems.
		Besides the power, it shows the two PWM control signals for the two servos which are the only other required wires to get running.
		This is necessary so that the PWM signals will have the same ground reference voltage level for both the microcontroller and the servos.
	members.cox.net /rbirac2/Ebot/power_supply.htm (797 words)

	Power Supplies / Infinisys / PowerBoxx / Power Supply (Site not responding. Last check: 2007-11-03)
		Power supply design theory has historically been rooted in the proposition that the original equipment should be designed to be affordable and the spare parts should be expensive.
		Hence, the spare parts business is a huge source of revenue for the power supply manufacturers and a major headache for those using the systems.
		The intuitive design of the Intellisys power and control circuit is most surprising in its outright simplicity, range of operation, low component count and accessibility.
	www.lectrotherm.com /ltipowersupply.html (509 words)

	Why do Hydrogeologic Investigation? (Site not responding. Last check: 2007-11-03)
		We perform (1) hydrogeology, which is the scientific study of ground water and its earthen framework (hydrology + geology), but which in practice encompasses planning and forensics, and other scientific disciplines, in our case including microbiology and hydrogeochemistry.
		Data are collected about the type and thickness of geologic materials, the occurrence of ground water, how it flows in pore spaces and/or fractures, and the quality of the ground water.
		Usually the well head (or ground water source water) protection area is is based on the amount of time a contaminant may take to travel through the area to reach the water source, often 1 and 5 years, and in some states, 10 or more years.
	www.groundwatersystems.com /market.html (2906 words)

	Cathodic Protection Pulse Rectifier Model 3015 Pulser by Farwest Corrosion
		The main power transformer is a single-phase toroidal transformer with four independent (isolated) secondaries (one for each individual pulse module).
		The Power Distribution Panel is located behind the Control Panel and provides a means for delivering the DC pulse current to the individual structures to be protected.
		The ground bed usually consists of one or more rods, called anodes, fabricated from expendable materials such as graphite or silicon steel.
	www.farwestcorrosion.com /fwst/dcpower/pulser3015.htm (1266 words)

	Power Supply Integrity (Site not responding. Last check: 2007-11-03)
		Proper bypassing and decoupling techniques improve overall power supply signal integrity, which is important for reliable design operation. These techniques become more significant with increased power supply current requirements as well as increased distance from the power supply to the point-of-load (generally the FPGA or CPLD device).
		Large capacitors continue to supply current after the high-frequency capacitors have been depleted of their energy stores.
		power supply bypass capacitor must be significantly larger than the equivalent switched logic array capacitance.
	www.altera.com /support/devices/power/integrity/pow-integrity.html (1136 words)

	Macfarlane Generators - About Wind Turbines
		Wind Turbines will typically be installed in small groups of 2 to 5 units connected to the existing utility grid, or in larger groups of 10 to 30 units with a dedicated transmission line to a suitable connection point at a nearby high voltage cable or switchyard.
		Turbines are installed on concrete foundations that are buried well below ground level with a pedestal to mount the tower on so the landholder can work the land right up to the base of the tower.
		It should be remembered that a coal fired power station never recovers the energy used to construct and operate it as these power stations have a continuing requirement for very large amounts of energy to operate.
	www.macgen.com /windpower/windfarms/About_Wind_Turbines.html (1751 words)

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