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... voltmeter in parallel with the first bulb to measure the voltage across (from one side of the bulb to the other) the first light bulb, V1. Without changing the voltage on the power supply, connect the voltmeter in parallel with the second bulb only (left hand circuit drawing of figure 7) to measure ...
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... feed this signal back to the VGA gain control input with the noise intact, the rms voltage going to the external measurement node can be filtered using a simple filter to yield a largely noise-free rms voltage. Figure 6 shows the resulting reduction in transfer function ripple of the rms-to-dc conve ...
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... PowerPath control scheme that seamlessly switches over the system power from a 2-AA battery to USB/wall Power and vice versa. Figure 5 shows a simplified block diagram of the internal power-path. The AC adapter and the USB bus supply power to the switching regulators via the VEXT pin. The LTC3456 con ...
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CHAPter 10 - Amazon Web Services
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... Two broad classes of A/D converters exist, simultaneous or flash converters which operate in parallel and sequential converters which operate serially. The parallel converter is a straight forward device which operates more quickly than a sequential converter. Unfortunately, flash converters are al ...
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... experienced by the actuator, especially in the extended position. For example, an electric actuator or hydraulic cylinder may move a dynamic load to 10,000 N over 1,000 mm of stroke with no problems — if it experiences the highest load when the device is in the retracted position, and load is signif ...
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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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