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DC Current Measurement Using Magnetic Flux in an Electronic Null
DC Current Measurement Using Magnetic Flux in an Electronic Null

... to use a DC current transformer based on a Hall element as in reference [1]. In Figure 1, the DC current ”‘Transformer”’ contains a ferrite core which is magnetized by the current In to be measured. The magneto motive force or mmf, from a current Im flows in an auxiliary winding with NM turns. It op ...
College of Southern Nevada
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... voltage often is expressed in terms of dBs, initial and final transmitter power when there is an upgrade can be expressed as a power gain in dBs, and other examples can be found in the fields of acoustics and optics. ...
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... different types that target different types of noise on the power supply leads. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically 1.0µF, placed as close as possible to the device VDD terminal works best. F ...
G201 STEP MOTOR DRIVE
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... 2.2.b. For the given two resistors, first measure their values individually. Then, connect them in series using the breadboard, and measure the equivalent resistance. Also, calculate this resistance. Finally, connect them in parallel using the breadboard, and measure the equivalent resistance. Also ...
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Aalborg Universitet Blaabjerg, Frede; Ma, Ke; Yang, Yongheng
Aalborg Universitet Blaabjerg, Frede; Ma, Ke; Yang, Yongheng

... even more widely adopted in the future. As it has been demonstrated in Fig. 7, the power electronics technology still plays an essential role in those two concepts. Regarding the power converter topologies for wind power applications, the most commonly adopted three-phase converter is the two-level ...
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... capture high-speed and high-voltage phenomena by using the newly developed 100 MS/s 12Bit 20 MHz frequency range 1-kV* Isolation Module (model 720210). Furthermore, you can combine modules that support measurements of a variety of signals, giving you solutions for an extensive range of applications. ...
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... determined by the τRC time constant resulting from RFB (10 MΩ in this case) combined with gate and strain capacitances in the feedback path in Fig. 2. The overshoot could be reduced by decreasing the value of RFB and increasing the maximum value of Iprog in order to maintain the same output voltage ...
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... continuous speed control and other functionalities to further optimize your production. This comprehensive package of control functionalities provides optimal results for rod-pumped applications. xx Inherent soft start reduces inrush current. xx Operating motor at optimal levels reduces power consum ...
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... current limit level is 2.2 A. When VTT rises above (VTTREF – 5%) or falls below (VTTREF + 5%), the current limit level switches to 3.8 A. The thresholds are typically VTTREF ±5% (from outside regulation to inside) and ±10% (when it falls outside). The soft-start function is completely symmetrical, a ...
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... energy, but as the voltage in the capacitor (Vc) has to be continuous, when the circuit breaker closes for a voltage value that not zero, the capacitor has to be charged through the inductor, initiating a transient with the system natural frequency. After a very short moment the voltage in the capac ...
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... to 240°. It is blocked at point B, but is immediately triggered at point B’ by the next gate pulse. During the first half-waves, operation is slightly asymmetrical but gradually the durations of conduction become balanced (refer to the dotted line curve in Figure 7). Figure 8 gives the circuit diagr ...
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... 13. In a screen grid configuration the tubes must be triggered with a current pulse which is considerably higher than that required in a normal configuration. 14. The optimum grid 1 pulse current is the maximum value which can be applied without causing the tube to trigger before the grid 2 pulse is ...
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Power electronics



Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)
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