Digital Transmission
... HDB3 substitutes four consecutive zeros with 000V or B00V depending on the number of nonzero pulses after the last substitution. ...
... HDB3 substitutes four consecutive zeros with 000V or B00V depending on the number of nonzero pulses after the last substitution. ...
MTEC - UCF EECS
... • Control each slave device through chip select • When slave is disabled, slave goes into a high impedence state that does not interfere with active slave and ignores data sent ...
... • Control each slave device through chip select • When slave is disabled, slave goes into a high impedence state that does not interfere with active slave and ignores data sent ...
Project - sunist
... operation with a single failure per phase, whilst the power thyristor strings in the controllers can tolerate a single level failure. Only certain comparatively low cost components, such as cooling pumps, have been duplicated in the designs. Unless the requirement for current symmetry can be relaxed ...
... operation with a single failure per phase, whilst the power thyristor strings in the controllers can tolerate a single level failure. Only certain comparatively low cost components, such as cooling pumps, have been duplicated in the designs. Unless the requirement for current symmetry can be relaxed ...
Diode :- Clamper
... How Does A Clamp Circuit Work? •In the positive half cycle C gets charged through D to 10V (peak of sine wave + 5 V) with the straight plate of C at a higher potential. D Clips the output to a maximum of -5V. •In the negative half cycle D is reverse biased. The output can reach a minimum of –15V (- ...
... How Does A Clamp Circuit Work? •In the positive half cycle C gets charged through D to 10V (peak of sine wave + 5 V) with the straight plate of C at a higher potential. D Clips the output to a maximum of -5V. •In the negative half cycle D is reverse biased. The output can reach a minimum of –15V (- ...
A The Surge Diverter B The Low Impedance Isolation Transformer C
... semiconductor device like a transistor or integrated circuit. Destructive disturbances can enter a computer system via either mode (see above) but are most often associated with Normal Mode pathways. Destructive power disturbances are the easiest to identify since they leave visible evidence of thei ...
... semiconductor device like a transistor or integrated circuit. Destructive disturbances can enter a computer system via either mode (see above) but are most often associated with Normal Mode pathways. Destructive power disturbances are the easiest to identify since they leave visible evidence of thei ...
48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the
... Benefits of the active clamp include a control-driven transformer-reset scheme allowing zero-voltage switching (ZVS) to increase overall efficiency, lower drain-to-source voltage stress, extended duty cycle beyond 50%, and reduced electromagnetic radiated emissions. Combined with synchronous rectifi ...
... Benefits of the active clamp include a control-driven transformer-reset scheme allowing zero-voltage switching (ZVS) to increase overall efficiency, lower drain-to-source voltage stress, extended duty cycle beyond 50%, and reduced electromagnetic radiated emissions. Combined with synchronous rectifi ...
τ-SPAD τ-SPAD
... with specially developed quenching electronics from PicoQuant (patent pending). It features an extremely high photon detection efficiency of typically 70 % at 670 nm and can be used to detect single photons over the 400 nm to 1100 nm wavelength range. The t-SPAD generates a NIM and a TTL output puls ...
... with specially developed quenching electronics from PicoQuant (patent pending). It features an extremely high photon detection efficiency of typically 70 % at 670 nm and can be used to detect single photons over the 400 nm to 1100 nm wavelength range. The t-SPAD generates a NIM and a TTL output puls ...
![Dynamic VAR`s [D-VAR]](http://s1.studyres.com/store/data/008161131_1-082e6e1fddaf6a197897b251ba053ae1-300x300.png)
Dynamic VAR`s [D-VAR]
... • Import/ Transfer Capability Restrictions • Limited ability to reliably import, export, or transfer power • Mitigate ...
... • Import/ Transfer Capability Restrictions • Limited ability to reliably import, export, or transfer power • Mitigate ...
DMS-20RM Series - Murata Power Solutions
... Murata Power Solutions’ DMS-20RM series are four-wire, self-contained ac voltmeters that measure and display the true-rms values of complex ac waveforms. Because the input circuitry is electrically isolated from the unit’s operating power source, these voltmeters can measure signals down to zero vol ...
... Murata Power Solutions’ DMS-20RM series are four-wire, self-contained ac voltmeters that measure and display the true-rms values of complex ac waveforms. Because the input circuitry is electrically isolated from the unit’s operating power source, these voltmeters can measure signals down to zero vol ...
Cuk Converter Fed BLDC Motor with a Sensorless Control Method
... In BLDC motors, only two out of three phases are excited at any time leaving the third winding floating. The back emf in the floating winding can be measured to determine the switching sequence for commutation of power switching devices in the 3 phase inverter. The terminal voltage of the floating wind ...
... In BLDC motors, only two out of three phases are excited at any time leaving the third winding floating. The back emf in the floating winding can be measured to determine the switching sequence for commutation of power switching devices in the 3 phase inverter. The terminal voltage of the floating wind ...
Guided Source of Current for the Helmholtz Coils
... reverse direction. Resistors Rz1 - Rz5 plugged in the circles of gates of transistors for defence of driver scheme in the case of breakdown of the gate [7]. As resistance of these resistors far less than input resistance of the field-effect transistor, on the process of management it is possible to ...
... reverse direction. Resistors Rz1 - Rz5 plugged in the circles of gates of transistors for defence of driver scheme in the case of breakdown of the gate [7]. As resistance of these resistors far less than input resistance of the field-effect transistor, on the process of management it is possible to ...
BDTIC C C M - P F C
... The IC operates with a cascaded control; the inner current loop and the outer voltage loop. The inner current loop of the IC controls the sinusoidal profile for the average input current. It uses the dependency of the PWM duty cycle on the line input voltage to determine the corresponding input curr ...
... The IC operates with a cascaded control; the inner current loop and the outer voltage loop. The inner current loop of the IC controls the sinusoidal profile for the average input current. It uses the dependency of the PWM duty cycle on the line input voltage to determine the corresponding input curr ...
Objective type questions and answers
... Thus, theoretically, for 50% of full load requirement the power input needed would be less than 13% of full load power. In a centrifugal pump when the flow discharge is reduced to 70% of the rated discharge a savings of 65 percent in power is theoretically possible. To achieve this savings, Solid st ...
... Thus, theoretically, for 50% of full load requirement the power input needed would be less than 13% of full load power. In a centrifugal pump when the flow discharge is reduced to 70% of the rated discharge a savings of 65 percent in power is theoretically possible. To achieve this savings, Solid st ...
Efficiently harvesting energy from temperature differences in order to
... needed. This is realized by taking advantage of the Vth of Q4 and by using a dual common cathode diode (D1). Energy can only be transferred in one direction, the controller is never supplied from C6 and also a cyclic heat source can be used. When loading C6, the only load is the Supervisory IC4 (TPS ...
... needed. This is realized by taking advantage of the Vth of Q4 and by using a dual common cathode diode (D1). Energy can only be transferred in one direction, the controller is never supplied from C6 and also a cyclic heat source can be used. When loading C6, the only load is the Supervisory IC4 (TPS ...
Understanding Power Quality - Meralco Corporate Partners
... Maximum deviation from the average of the three-phase voltages divided by the average of the three-phase voltages, usually expressed in percent ...
... Maximum deviation from the average of the three-phase voltages divided by the average of the three-phase voltages, usually expressed in percent ...
HARMONICS - Understanding the Facts - Part 2
... microprocessor or computer-based instrument is quite difficult. So more compatible processes, called the FFT for Fast Fourier Transform, or DFT for Discrete Fourier Transform, are used. These methods only work properly if the signal is composed of only the fundamental and harmonic frequencies in a c ...
... microprocessor or computer-based instrument is quite difficult. So more compatible processes, called the FFT for Fast Fourier Transform, or DFT for Discrete Fourier Transform, are used. These methods only work properly if the signal is composed of only the fundamental and harmonic frequencies in a c ...
170 Vdc Output, Quasi-Resonant Supply
... controller, enhances efficiency with zero voltage switching (ZVS) and minimizes EMI for TV and monitor applications. A common and differential mode input EMI filter is included along with NTC thermistor inrush current limiting. The 170 volt output is regulated by a simple, yet effective TL431 and op ...
... controller, enhances efficiency with zero voltage switching (ZVS) and minimizes EMI for TV and monitor applications. A common and differential mode input EMI filter is included along with NTC thermistor inrush current limiting. The 170 volt output is regulated by a simple, yet effective TL431 and op ...
2212 Contrec Avtrac DataSheet
... circuit which will accept pulse or frequency flow signals generated by turbine, positive displacement, paddlewheel or other flowmeters. ...
... circuit which will accept pulse or frequency flow signals generated by turbine, positive displacement, paddlewheel or other flowmeters. ...
this PDF file
... micro grid with local loads and managements. To ensure proper performance of the micro grid, DG is usually required to work in two modes: stand-alone or grid connected because of the interface between RES and distributed power grid, the performance of power electronic converters becomes critical. Z- ...
... micro grid with local loads and managements. To ensure proper performance of the micro grid, DG is usually required to work in two modes: stand-alone or grid connected because of the interface between RES and distributed power grid, the performance of power electronic converters becomes critical. Z- ...
K9 Sounds Notes on K9`s speech repertoire. Script link Me
... 2) The description says "Powered by included 120V AC wall adapter" which is the wrong kind of power (we want DC) and too much. Of course, that adapter is almost certainly converting to DC, but there are no included details about what DC voltage it has or how much current it draws (expressed as AMPS ...
... 2) The description says "Powered by included 120V AC wall adapter" which is the wrong kind of power (we want DC) and too much. Of course, that adapter is almost certainly converting to DC, but there are no included details about what DC voltage it has or how much current it draws (expressed as AMPS ...
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.