Generator dc - schoolphysics
... press against a split ring of copper. This means that a varying but unidirectional e.m.f will be produced. A d.c generator and its output is shown in simplified form in Figure 1. As with the a.c. generator, the d.c. machine usually uses rotating field coils, a series of them being wound round in the ...
... press against a split ring of copper. This means that a varying but unidirectional e.m.f will be produced. A d.c generator and its output is shown in simplified form in Figure 1. As with the a.c. generator, the d.c. machine usually uses rotating field coils, a series of them being wound round in the ...
Smart Grid Applications
... of Imminent Voltage Collapse Voltage collapse is a phenomenon that occurs due to lack of reactive power. Frequently it is difficult to detect from voltage measurements because the system “controls” the voltage. In today’s (smart grid) terminology this is called Synchrophasor (or AMI). ...
... of Imminent Voltage Collapse Voltage collapse is a phenomenon that occurs due to lack of reactive power. Frequently it is difficult to detect from voltage measurements because the system “controls” the voltage. In today’s (smart grid) terminology this is called Synchrophasor (or AMI). ...
harmonic current compensation in self excited induction generator
... Abstract: The paper presents the concept of wind power generation system inverter as SAF under balanced and unbalanced conditions. PV based systems are practically inactive during the night time, Because of the system cannot conserve the energy on the night time. During the night time, the PV-SAF pr ...
... Abstract: The paper presents the concept of wind power generation system inverter as SAF under balanced and unbalanced conditions. PV based systems are practically inactive during the night time, Because of the system cannot conserve the energy on the night time. During the night time, the PV-SAF pr ...
Typical Application Diagram
... QX5241 is a step-down high-brightness LED constant-current driver with high accuracy. A high-side current-sense resistor adjusts the output current, which minimizes the number of external components while delivering an LED current with ±1% accuracy, and a dedicated PWM input (DIM) makes a wide range ...
... QX5241 is a step-down high-brightness LED constant-current driver with high accuracy. A high-side current-sense resistor adjusts the output current, which minimizes the number of external components while delivering an LED current with ±1% accuracy, and a dedicated PWM input (DIM) makes a wide range ...
here - ECE - University of Maryland
... output power stage to deliver the necessary current to drive the speakers, or you can redesign the preamp stage if its performance was far below specs. Linear amplification is important as it decides the total harmonic distortion (THD) of your audio amp and hence its HiFi quality. THD must usually b ...
... output power stage to deliver the necessary current to drive the speakers, or you can redesign the preamp stage if its performance was far below specs. Linear amplification is important as it decides the total harmonic distortion (THD) of your audio amp and hence its HiFi quality. THD must usually b ...
Pulse and Exponential Waveforms in PSPICE
... sources in PSPICE. In previous tutorials we have described the DC voltage source, VDC, and the sinusoidal voltage source, VSIN. In each case we will want to observe voltages and/or currents as a function of time. Thus, the Transient Analysis will be used. Pulse Waveform A voltage pulse or pulse trai ...
... sources in PSPICE. In previous tutorials we have described the DC voltage source, VDC, and the sinusoidal voltage source, VSIN. In each case we will want to observe voltages and/or currents as a function of time. Thus, the Transient Analysis will be used. Pulse Waveform A voltage pulse or pulse trai ...
TGA4826-SM 数据资料DataSheet下载
... TGA4826-SM Gain, IRL, ORL vs Freq Vd = 7 V, Id = 280 mA, Vctrl = 0.4 V ...
... TGA4826-SM Gain, IRL, ORL vs Freq Vd = 7 V, Id = 280 mA, Vctrl = 0.4 V ...
How to Select the Frequency Foldback Product Option When
... load range. Incorporating protection features for rugged operation, it is ideal in systems where cost−effectiveness, reliability, low stand−by power and high efficiency are key requirements: • Valley Synchronized Frequency Fold−back (VSFF): The circuit operates in Critical conduction Mode (CrM) when ...
... load range. Incorporating protection features for rugged operation, it is ideal in systems where cost−effectiveness, reliability, low stand−by power and high efficiency are key requirements: • Valley Synchronized Frequency Fold−back (VSFF): The circuit operates in Critical conduction Mode (CrM) when ...
determination of instantaneous values of power components in an
... As a result of research the adaptive current and voltage instrument transducer (ACVIT) was developed by the Institute of Electrodynamics of NAS of Ukraine. It is characterized by complete informational, electrical and functional compatibility with digital automated control systems (ACSs) of EEO and ...
... As a result of research the adaptive current and voltage instrument transducer (ACVIT) was developed by the Institute of Electrodynamics of NAS of Ukraine. It is characterized by complete informational, electrical and functional compatibility with digital automated control systems (ACSs) of EEO and ...
UMS-400-R16-G OCTAVE BAND VOLTAGE CONTROLLED OSCILLATOR Features
... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
SW822 - Curtis Instruments
... Developed for both interrupted and uninterrupted loads, the SW822 is suitable for switching Resistive, Capacitive and Inductive loads. • Interrupted current: opening and closing on load with frequent switching (results in increased contact resistance). • Uninterrupted current: no or infrequent loa ...
... Developed for both interrupted and uninterrupted loads, the SW822 is suitable for switching Resistive, Capacitive and Inductive loads. • Interrupted current: opening and closing on load with frequent switching (results in increased contact resistance). • Uninterrupted current: no or infrequent loa ...
Sine PWM and its Realization
... by putting a suitable low pass filter. The filter size requirement remains small if the harmonics are of high frequencies. In some applications, like ac motor drive application, the inherent low pass filtering characteristics of the motor-load itself is enough to satisfactorily block the flow of har ...
... by putting a suitable low pass filter. The filter size requirement remains small if the harmonics are of high frequencies. In some applications, like ac motor drive application, the inherent low pass filtering characteristics of the motor-load itself is enough to satisfactorily block the flow of har ...
light organ
... The light organ design utilizes the PIC16F886 MCU. This readily available, inexpensive MCU has a frequency range of 32 kHz to 8MHz. It has many input/output channels that can be either digital or analog. The MCU has comparators, a 10 bit, 11 channel Analog to Digital converter, and has two 8 bit as ...
... The light organ design utilizes the PIC16F886 MCU. This readily available, inexpensive MCU has a frequency range of 32 kHz to 8MHz. It has many input/output channels that can be either digital or analog. The MCU has comparators, a 10 bit, 11 channel Analog to Digital converter, and has two 8 bit as ...
s-series switch – low VoltaGe
... provide a tactical response when pressed. Switch button functionality can be blank or identified with an ICON or text. They can also be provided with an LED that can be configured as a pilot light that provides visual orientation in a dark room or an indicator light that provides a visual status dep ...
... provide a tactical response when pressed. Switch button functionality can be blank or identified with an ICON or text. They can also be provided with an LED that can be configured as a pilot light that provides visual orientation in a dark room or an indicator light that provides a visual status dep ...
PA 300 - Extron
... features such as variable gain, low and high frequency peaking, and support for bi-level and HDTV tri-level sync. Variable gain control compensates for voltage variances, and allows sharp, bright image reproduction from virtually any signal source. Independent controls for low frequency and high fre ...
... features such as variable gain, low and high frequency peaking, and support for bi-level and HDTV tri-level sync. Variable gain control compensates for voltage variances, and allows sharp, bright image reproduction from virtually any signal source. Independent controls for low frequency and high fre ...
Unit 4 Assignment
... Explain the sphere gap method used for measurement of peak value of voltage. Q1. (a) Solution: Sphere Gap used for measurement of peak value of voltage Sphere Gap: This is one of the oldest technique adopted for the measurement of all the types (dc =, ac ~ and impulse) high voltages of either polar ...
... Explain the sphere gap method used for measurement of peak value of voltage. Q1. (a) Solution: Sphere Gap used for measurement of peak value of voltage Sphere Gap: This is one of the oldest technique adopted for the measurement of all the types (dc =, ac ~ and impulse) high voltages of either polar ...
Article for Elektuur – August 2008
... Figure #2 shows a simple but efficient and quality oriented amplifier circuit. The term efficient is meant in the sense that it uses as few components as possible. The philosophy is clear : whatever is simple is easier. For easy reference, the resistors refer to their connections with the valves : R ...
... Figure #2 shows a simple but efficient and quality oriented amplifier circuit. The term efficient is meant in the sense that it uses as few components as possible. The philosophy is clear : whatever is simple is easier. For easy reference, the resistors refer to their connections with the valves : R ...
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.