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Mitigator Loop Coil - Triplett Test Equipment
Mitigator Loop Coil - Triplett Test Equipment

... customer. The strength of the Loop Coil’s signal WILL NOT lead the craftsperson to the equipment creating the harmonic currents. (If direct access to the customer’s load(s) is obtainable, it may be possible to measure increased harmonic output in the vicinity of the equipment.) In our example, the r ...
Aalborg Universitet Low-Voltage Ride Through
Aalborg Universitet Low-Voltage Ride Through

Aalborg Universitet Hybrid Three-Phase/Single-Phase Microgrid Architecture with Power Management Capabilities
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... With the high penetration of DGs, the concept of microgrids that can operate in either grid-connected or islanded modes is becoming more attractive [1]-[5]. A microgrid is a local controllable low-voltage distribution network consisting of a number of DGs, energy storage systems, and dispersed loads ...


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AAT4614 数据资料DataSheet下载

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AD8304 160 dB Range (100 pA –10 mA) Logarithmic Converter
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... Many operational modes are possible. For example, low-pass filters of up to three poles may be implemented, to reduce the output noise at low input currents. The buffer may also serve as a comparator, with or without hysteresis, using the 2 V reference, for example, in alarm applications. The increm ...
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... To evaluate the overcurrent protection performance ...
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High Speed Layout Design Guidelines This application note

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LPC1768 Short Slides ece362_lpc1768

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... endanger the safe operation of inverter by causing full dc voltage across one switch during transient commutation, especially when the inverter uses only one snubber circuit for three phases. Line voltage “jumps” produce more harmonic content in output voltage waveform, which is unfriendly to the mo ...
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... would be that the transmission line, acting like an antenna, would provide sufficient commonmode signal to overload the d etector input) . It is possible to obtain amplifiers which operate at audio frequencies, that have considerably less input noise voltage p er unit bandwidth than D.C . amplifiers ...
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... series to partially overcome the voltage drop across it in order to keep the per unit voltage drop realistic. The advantage of TNAs is that they operate in real time, and therefore a lot of "runs" can be made for statistical "Monte Carlo" type studies, where for example, the switching time of a circ ...
www.BDTIC.com/TI LF155,LF347,LF351,LF353,LF356,LF357, LM311,LM313,LM329,LM386,LM3900,LM394 Application Note 263 Sine Wave Generation Techniques
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... The ADN4670 is a clock driver/expander for low voltage differential signaling (LVDS). It takes a differential clock signal of typically 350 mV and expands it to 10 differential clock outputs with very low skew (typically < 30 ps). The device receives a differential current signal from a source such ...
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AP2552/ AP2553/ AP2552A/ AP2553A Description Pin Assignments

... An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors, sense FETs do not increase the series resistance of the current path. When an overcurrent condition is detected, AP2552/53 maintains a constant output current and reduces the output voltage acco ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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