WellPilot® Controllers for Rod Pump Optimization
... Yaskawa U1000 drive. This ac/ac drive enables current to flow both ways through a matrix of nine bidirectional switches—so power generated by the motor during deceleration is sent back to the power supply to be re-used. Because there is no ac/dc conversion, harmonics are exceptionally low and overal ...
... Yaskawa U1000 drive. This ac/ac drive enables current to flow both ways through a matrix of nine bidirectional switches—so power generated by the motor during deceleration is sent back to the power supply to be re-used. Because there is no ac/dc conversion, harmonics are exceptionally low and overal ...
lab sheet
... due to reactance from capacitance Cc, Ce and stray capacitance between the leads of the transistor. Thus to have a reasonable gain at higher frequency, we could increase the value of RL, the parallel resistance of the RLC tank network or increase the transconductance gm. Usually RL is fixed, as it i ...
... due to reactance from capacitance Cc, Ce and stray capacitance between the leads of the transistor. Thus to have a reasonable gain at higher frequency, we could increase the value of RL, the parallel resistance of the RLC tank network or increase the transconductance gm. Usually RL is fixed, as it i ...
The Pyroelectric Fire alarm
... circuits. Operational amplifier An operational amplifier ("op-amp") is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. An op-amp produces an output voltage that is typically hundreds of thousands times larger than the voltage differe ...
... circuits. Operational amplifier An operational amplifier ("op-amp") is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. An op-amp produces an output voltage that is typically hundreds of thousands times larger than the voltage differe ...
Powerframes Components Core System 60-070-230
... Basic synchronising by phase indicator lamps grouped in a triangle. Can be connected for lamps-bright or lamps-dark technique. A power switch is provided to connect the systems together. Accommodates Single or Three Phase. Safety earth connection provided. 380 – 415 V operation. ...
... Basic synchronising by phase indicator lamps grouped in a triangle. Can be connected for lamps-bright or lamps-dark technique. A power switch is provided to connect the systems together. Accommodates Single or Three Phase. Safety earth connection provided. 380 – 415 V operation. ...
IPN = 100 .. 400 A AC/DC Current Transducer DHR-C10
... ●● Large aperture for cable up to Ø32mm ●● High isolation between primary and secondary circuits ●● Easy installation ...
... ●● Large aperture for cable up to Ø32mm ●● High isolation between primary and secondary circuits ●● Easy installation ...
LPC661 Low Power CMOS Operational Amplifier
... Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electric ...
... Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electric ...
pptx
... largely determined by the operation of transistor switching • The duty cycle of the switching will determine the mode each converter operate at various loads D is the duty cycle ...
... largely determined by the operation of transistor switching • The duty cycle of the switching will determine the mode each converter operate at various loads D is the duty cycle ...
The development of power electronics in Europe
... transformers. In contrast the rotary converter, system Leonard allowed an easy change of the DC voltage by regulating generator's excitation and load peaks could be reduce by the rotating mass. On the other side mercury arc rectifiers can work in a wide range of voltages and frequencies, so that one ...
... transformers. In contrast the rotary converter, system Leonard allowed an easy change of the DC voltage by regulating generator's excitation and load peaks could be reduce by the rotating mass. On the other side mercury arc rectifiers can work in a wide range of voltages and frequencies, so that one ...
Better Accuracy in Temperature Calibration and Measurement
... since the DAC would carry the full accuracy burden of the measurement system. However, by using a PWM DAC, in which the output is a signal of fixed frequency and amplitude but variable pulse width, we turn the problem of producing accurate voltage or current levels into one of accurate timing. Where ...
... since the DAC would carry the full accuracy burden of the measurement system. However, by using a PWM DAC, in which the output is a signal of fixed frequency and amplitude but variable pulse width, we turn the problem of producing accurate voltage or current levels into one of accurate timing. Where ...
Aleph Ono - Pass Labs
... measurement. Perhaps this will occur, but in the meantime, audiophiles largely reject bench specifications as an indicator of audio quality. This is appropriate. Appreciation of audio is a completely subjective human experience. We should no more let numbers define audio quality than we would let ch ...
... measurement. Perhaps this will occur, but in the meantime, audiophiles largely reject bench specifications as an indicator of audio quality. This is appropriate. Appreciation of audio is a completely subjective human experience. We should no more let numbers define audio quality than we would let ch ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... result in an excellent capability for improving power system dynamics. flexible AC Transmission Systems (FACTS) technology provides unprecedented way for controlling transmission grids and increasing transmission capacity. series compensation is an effective mean to increase the electrical power tra ...
... result in an excellent capability for improving power system dynamics. flexible AC Transmission Systems (FACTS) technology provides unprecedented way for controlling transmission grids and increasing transmission capacity. series compensation is an effective mean to increase the electrical power tra ...
Overview of Dynamic Voltage Restorer (DVR) for Power Quality
... The injected voltages are introduced into the distribution system through an injection transformer connected in series with the distribution feeder. The primary side of the injection transformer is connected in series to the distribution line, while the secondary side is connected to the DVR power c ...
... The injected voltages are introduced into the distribution system through an injection transformer connected in series with the distribution feeder. The primary side of the injection transformer is connected in series to the distribution line, while the secondary side is connected to the DVR power c ...
LATCHES AND FILP FLOPS
... The driving chip’s VOH(min) must be greater than the driven circuit’s VIH(min) , and the driver’s VOL(max) must be less than VIL(max) for the loading circuit. Voltage level shifters must be used to interface the circuits together if these voltage requirements are not met. Of course, a driving circui ...
... The driving chip’s VOH(min) must be greater than the driven circuit’s VIH(min) , and the driver’s VOL(max) must be less than VIL(max) for the loading circuit. Voltage level shifters must be used to interface the circuits together if these voltage requirements are not met. Of course, a driving circui ...
Evaluates: MAX649/MAX651/MAX652/MAX1649/MAX1651 MAX1649 Evaluation Kit General Description Features
... Second, open jumper JU3 and resistor R3 by cutting the thin PCB trace between their pads. Finally, install R2 and R3. The standard output filter capacitor is rated at 10V. Use a higher-rated capacitor if necessary. When using the MAX1651 or when adjusting the output of either device, an input voltag ...
... Second, open jumper JU3 and resistor R3 by cutting the thin PCB trace between their pads. Finally, install R2 and R3. The standard output filter capacitor is rated at 10V. Use a higher-rated capacitor if necessary. When using the MAX1651 or when adjusting the output of either device, an input voltag ...
reactive power - KFUPM Faculty List
... Voltage control in an electrical power system is important for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to reduce transmission losses and to maintain the ability of the system to withstand and prevent voltage collapse. In general ...
... Voltage control in an electrical power system is important for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to reduce transmission losses and to maintain the ability of the system to withstand and prevent voltage collapse. In general ...
Static Voltage Stability Analysis of a Power System
... The conventional method for modeling and simulating power systems can be classified into two main categories: 1) differential algebraic equation solver based methods, such as implemented in SimPower System Toolbox by Matlab/Simulink, and 2) nodal admittance matrix based circuit simulation methods [2 ...
... The conventional method for modeling and simulating power systems can be classified into two main categories: 1) differential algebraic equation solver based methods, such as implemented in SimPower System Toolbox by Matlab/Simulink, and 2) nodal admittance matrix based circuit simulation methods [2 ...
UM0933
... For the second option, it is sufficient to connect a suitable clamp (available in most specialized outlets, though not included in the demonstration package) to the negative output of the board, through a cable not longer then 2 mt and with a cross section not less than 16 mm2. Connect a suitable we ...
... For the second option, it is sufficient to connect a suitable clamp (available in most specialized outlets, though not included in the demonstration package) to the negative output of the board, through a cable not longer then 2 mt and with a cross section not less than 16 mm2. Connect a suitable we ...
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.