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Elec 499 Final Report - Electrical and Computer Engineering
Elec 499 Final Report - Electrical and Computer Engineering

Input System Instability
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DRV8313 2.5-A Triple 1/2-H Bridge Driver (Rev
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... half-H-bridge drivers. The device is intended to drive a three-phase brushless-DC motor, although it can also be used to drive solenoids or other loads. Each output driver channel consists of N-channel power MOSFETs configured in a 1/2-H-bridge configuration. Each 1/2-H-bridge driver has a dedicated ...
IOSR Journal of VLSI and Signal Processing (IOSR-JVSP)
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WECC-0100 TPL-001-WECC-CRT-3 Response to Comment
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... next. Requirement WR1, subsets WR1.1.1 and 1.1.2 allow the studying entities to establish a unique nominal value that fits its specific system(s). In the context of Requirement WR1 “nominal” is uniquely determined by the steadying entity. The Applicability section also acknowledges that certain elem ...
Method for measurement of the sensitivity of crystal resonators to
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... I. INTRODUCTION In recent years significant progress has been made in crystal resonator design to effect a substantial reduction in g-sensitivity values [1]. With such reduced levels of acceleration sensitivity, the need has arisen for a measurement system with appropriately higher resolution. The m ...
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... converter likely. Semiconductor switches turned on and off more fast and lasted longer than other switches such as vacuum tubes and electromechanical relays. Middlebrook averaged the circuit configurations for each switch state in a method called state-space averaging. This simplification reduced tw ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
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... The discharged current propagates through the transmission cable and signal cables with understanding the problem of overvoltage in inverter fed induction motor with long supply cables . Considering classical transmission line analysis, and traveling-wave analysis with zero initial charges on cables ...
Nonactive Current Definition and Compensation Using a Shunt Active Filter
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... 1. Two batteries of 24V and 20V with internal resistances of 0.4Ω and 0.25Ω respectively are connected in parallel across a load of 4Ω. Calculate (i) the current supplied by each battery and (ii) voltage across the load. (Soln: 8.1482A , -2.963A , 20.741V) 2. A resistance R is connected in series wi ...
Specific symptoms of single-phase inverters faults that are required for an expert system design Sergiu Valentin Popescu, Constantin Ghiţă, Anca-Simona Deaconu, Aurel-Ionuţ Chirilă, Ioan-Dragoş Deaconu
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LTC3550-1
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... Ohm’s Law is a powerful tool that is used to __________. ANS: The best answer/response to the above question/statement is: a) predict how a circuit will react to changes in current b) predict how a circuit will react to changes In voltage c) predict how a circuit will react to changes in resistance ...
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... very low start current. Another reason for the application of a slip ring motor is that it is able to offer a high degree of control. If the slip ring motor is employed to give a very high start torque across the entire speed range, then the soft starter is not going to provide a satisfactory soluti ...
AAT4285 数据资料DataSheet下载
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... exceed VIN should be avoided since this would forward bias the internal parasitic diode and allow excessive current flow into the OUT pin and possibly damage the load switch. In applications where there is a possibility of VOUT exceeding VIN for brief periods of time during normal operation, the use ...
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AAT2606 数据资料DataSheet下载
AAT2606 数据资料DataSheet下载

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AP Physics Free Response Practice – Circuits 1976B3. In the circuit
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... water in a glass beaker. 24 V battery with negligible internal resistance provides the power. The three resistors may be connected in series or in parallel. a. i. If they are connected in series, what power is developed in the circuit? ii. If they are connected in parallel, what power is developed i ...
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... keyless entry systems popular on many new cars and trucks, and the ubiquitous garage door opener. Other applications are emerging with the growth in home security, automation and the advent of various remote control applications. Typically these devices have been simplex, or one-way, links. They are ...
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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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