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Module 1
Module 1

... A pulse is applied to a low pass RC circuit. Prove by direct integration that the area under the pulse is the same as the area under the output waveform across the capacitor. Give physical interpretation of this result. ...
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... begin to conduct when the input voltage exceeds either power supply by about 0.7V. This situation can occur with loss of the amplifier’s power supplies while a signal source is still present. The diodes can typically withstand a continuous current of 30mA without destruction. To insure long term rel ...
Aug 2010 - Pump Ed 101
Aug 2010 - Pump Ed 101

... resistance, it is measured in ohms. Shortly we will see how inductive reactance can be used to help redefine Ohm’s law for use in AC circuits. Capacitive Circuits We will end this part with a quick discussion of purely capacitive circuits. A capacitor is a device that can store an electric charge an ...
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... 5 watt AC‐DC with single, dual, triple and asymmetric dual separated outputs Different package dimensions with up 264VAC or 305VAC PCB mountable encapsulated package 3000 & 4000VAC/60sec isolation Operating temperature: ‐25°C  or ‐40°C to +70°C with derating High efficiency up to 83% Low power consu ...
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... 2400 days (32 MB) of logged energy information Effective Energy Management • Reduce Peak Demand by identifying Peak Periods and Initiating Energy Reduction Control Schemes • Provide accountable , detailed, metrics-based end user awareness to drive ownership of energy savings ...
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... corresponds to tens of microvolts resolution. This is achievable with existing designs [6]. The design of the comparator is simplified as it operates at the oscillation frequency, which can be low, with a high slew rate to minimize TD. 3.2 Digital Current Source Control In most relaxation oscillator ...
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... read close to 5 volts.) To use a multimeter set up as a DC voltmeter, make sure the V button is pressed and that the DC button is pressed (the buttons may have wavy lines for AC and straight lines for DC). The multimeter may have three holes with two leads (wires) coming out. If so make sure the upp ...
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... The series element controls the amount of the input voltage that gets to the output. If the output voltage increases (or decreases), the comparator circuit provides a control signal to cause the series control element to decrease (or increase) the amount of the output voltage. ...
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... voltage source, the signal generator is still on). You can use a DC voltmeter to check that you have charged up the capacitor. (It should read close to 5 volts.) To use a multimeter set up as a DC voltmeter, make sure the V button is pressed and that the DC button is pressed (the buttons may have wa ...
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... The Paradise Datacom VSAT Block Up Converter (BUC) Bias Tee is an integral part of any high power VSAT System. The addition of a Bias Tee allows a 10 Watt or 20 Watt C-Band BUC and a 8 Watt or 10 Watt Ku-Band BUC to be powered through the IF cable. The Bias Tee is capable of handling operating curre ...
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... either a host or a peripheral and can dynamically switch between the two. Equipment with USB OTG capability has smaller interface sockets. The connector can take either mini A-plugs or mini B-plugs and is called a mini-AB receptacle. ...
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... current. It forces the cell current to flow through a current measurement resistor, Rm. The voltage drop across Rm is a measure of the cell current. Cell current in some experiments don't change much. In other experiments, such as a corrosion experiment, the current can often vary by as much as 7 or ...
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... Also, with the increased current, voltage drop increases, thereby the voltage at the supply point is reduced. For different loads it causes voltage drop resulting in: a. Lower output of the illumination system. b. Less current is drawn by the heating device so that the operating temperature drops. T ...
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... 3' Zones: All zones are 3' except the last 2' of the discharge bed, which is live roller, and the zone before that, which is 4' long. Drive: 400 lb pull end drive. Rollers: 14 gage, high speed HQ bearings, pop-out and captured rollers low. 4" c-c. Intermediate Zone Control W/Brake: Deactivates two a ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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