High Efficiency Motor Protection Industry White Paper
... is essentially the LRC for that current phase. However, if the circuit is energized when the voltage is zero the initial inrush current is made completely asymmetrical, that is, shifted from the nominal current axis (refer to Figure 2). This makes the inrush current greater than the LRC for that cur ...
... is essentially the LRC for that current phase. However, if the circuit is energized when the voltage is zero the initial inrush current is made completely asymmetrical, that is, shifted from the nominal current axis (refer to Figure 2). This makes the inrush current greater than the LRC for that cur ...
Single-Stage Resonant Battery Charger With Inherent Fellow, IEEE
... usually a constant dc; thus, the output power is constant. While the input ac supply outputs a sinusoidal power, a dc-link capacitor, with the value of which from a few hundred microfarads to a few thousand microfarads, is needed as an energy buffer tank [5], [6]. Usually, the dc-link capacitor is a ...
... usually a constant dc; thus, the output power is constant. While the input ac supply outputs a sinusoidal power, a dc-link capacitor, with the value of which from a few hundred microfarads to a few thousand microfarads, is needed as an energy buffer tank [5], [6]. Usually, the dc-link capacitor is a ...
Transformer - Spogel.com
... intersections, interchanges, traffic signals, or signs. Traffic is often classified by type: heavy motor vehicle (e.g., car, truck); other vehicle (e.g., moped, bicycle); and pedestrian. Different classes may share speed limits and easement, or may be segregated. Some jurisdictions may have very det ...
... intersections, interchanges, traffic signals, or signs. Traffic is often classified by type: heavy motor vehicle (e.g., car, truck); other vehicle (e.g., moped, bicycle); and pedestrian. Different classes may share speed limits and easement, or may be segregated. Some jurisdictions may have very det ...
1. electrical system - Bureau of Energy Efficiency
... 5. Operation of Captive Generation and Diesel Generation Sets When diesel generation sets are used to supplement the power supplied by the electric utilities, it is advisable to connect the D.G. sets for durations when demand reaches the peak value. This would reduce the load demand to a considerabl ...
... 5. Operation of Captive Generation and Diesel Generation Sets When diesel generation sets are used to supplement the power supplied by the electric utilities, it is advisable to connect the D.G. sets for durations when demand reaches the peak value. This would reduce the load demand to a considerabl ...
A.900 / A.1800 / A.2800 HEAVY DUTY PROFESSIONAL
... extreme harmonic distortion, making it sound harsh or dissonant. The clip limiter detects this and reduces the gain to minimize the amount of overdrive. To preserve as much of the program dynamics as possible, limiting reduces the average program level until ...
... extreme harmonic distortion, making it sound harsh or dissonant. The clip limiter detects this and reduces the gain to minimize the amount of overdrive. To preserve as much of the program dynamics as possible, limiting reduces the average program level until ...
half-wave rectification
... Over one full cycle the input and output voltages will appear as shown in Fig. ...
... Over one full cycle the input and output voltages will appear as shown in Fig. ...
oil well monitoring system
... Display voltage readings to LCD screen Control the enable switch on the TPS54260EVM597 DC-DC buck converter for hysteresis and over-voltage protection ...
... Display voltage readings to LCD screen Control the enable switch on the TPS54260EVM597 DC-DC buck converter for hysteresis and over-voltage protection ...
single phase unified power flow controller without dc link
... VSI. The switching device of a VSI is usually a gate turn-off device paralleled by a reverse diode; this function endows the VSI advanced controllability. Various combinations of the switching devices and appropriate topology make it possible for a STATCOM to vary the AC Output voltage in both magni ...
... VSI. The switching device of a VSI is usually a gate turn-off device paralleled by a reverse diode; this function endows the VSI advanced controllability. Various combinations of the switching devices and appropriate topology make it possible for a STATCOM to vary the AC Output voltage in both magni ...
Abstract - JPInfotech
... extraction, a distributed maximum power point tracking control scheme is applied to both single- and three-phase multilevel inverters, which allows independent control of each dc-link voltage. For three-phase grid-connected applications, PV mismatches may introduce unbalanced supplied power, leading ...
... extraction, a distributed maximum power point tracking control scheme is applied to both single- and three-phase multilevel inverters, which allows independent control of each dc-link voltage. For three-phase grid-connected applications, PV mismatches may introduce unbalanced supplied power, leading ...
A New Approach to the Elimination of Harmonics in a Multilevel
... where s is the number of dc sources. Ideally, given a desired fundamental voltage V1 , one wants to determine the switching angles θ1 , . . . , θs so that (1) becomes V (ωt) = V1 sin(ωt). In practice, one is left with trying to do this approximately. The goal here is to choose the switching angles 0 ...
... where s is the number of dc sources. Ideally, given a desired fundamental voltage V1 , one wants to determine the switching angles θ1 , . . . , θs so that (1) becomes V (ωt) = V1 sin(ωt). In practice, one is left with trying to do this approximately. The goal here is to choose the switching angles 0 ...
NM485SLC - power, Murata
... in the common mode voltage level of the signals. Twisted pair cable is commonly used for differential communications since its twisted nature tends to cause cancellation of the magnetic fields generated by the current flowing through each wire, thus reducing the effective inductance of the pair. Compu ...
... in the common mode voltage level of the signals. Twisted pair cable is commonly used for differential communications since its twisted nature tends to cause cancellation of the magnetic fields generated by the current flowing through each wire, thus reducing the effective inductance of the pair. Compu ...
analog multiplexer/demultiplexer
... transition time, if the transition time is less than 12 ms. When the inhibit signal turns a channel off, there is no change dumping of VSS. Rather, there is a slight rise in the channel voltage level (65 mV typ.) due to the capacitance coupling from inhibit input to channel input or output. Address ...
... transition time, if the transition time is less than 12 ms. When the inhibit signal turns a channel off, there is no change dumping of VSS. Rather, there is a slight rise in the channel voltage level (65 mV typ.) due to the capacitance coupling from inhibit input to channel input or output. Address ...
AN-4160 FTCO3V455A1 3-Phase Inverter Automotive Power Module Introduction www.fairchildsemi.com
... contains a pair of logic-controlled current drivers: a groundreferenced driver for the lower switch and a floating driver referenced to the bridge midpoint for the upper device. A gate driver IC, like the FAN7080_GF085, has internal logic to prevent the upper and lower devices from being turned ON a ...
... contains a pair of logic-controlled current drivers: a groundreferenced driver for the lower switch and a floating driver referenced to the bridge midpoint for the upper device. A gate driver IC, like the FAN7080_GF085, has internal logic to prevent the upper and lower devices from being turned ON a ...
LMC6482 CMOS Dual Rail-To-Rail Input and Output Operational Amplifier CMOS
... It is generally recognized that any circuit which must operrate with less than 1000pA of leakage current requires special layout of the PC board. When one wishes to take advantage of the ultra-low input current of the LMC6482, typically less than 20fA, it is essential to have an excellent layout. Fo ...
... It is generally recognized that any circuit which must operrate with less than 1000pA of leakage current requires special layout of the PC board. When one wishes to take advantage of the ultra-low input current of the LMC6482, typically less than 20fA, it is essential to have an excellent layout. Fo ...
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.