CSC 335 Data Communications and Networking I
... Motivation on Modulation and Demodulation If either analog or digital signals were used exclusively, communications would be simplified. However, this is impossible especially attempting to send signals across a long distance. Digital signals cannot be transmitted far without being converted to ana ...
... Motivation on Modulation and Demodulation If either analog or digital signals were used exclusively, communications would be simplified. However, this is impossible especially attempting to send signals across a long distance. Digital signals cannot be transmitted far without being converted to ana ...
Design of a Cascaded H-Bridge Multilevel Inverter Based on Power
... Multilevel power conversion has been receiving increasing attention in the past few years for high power applications. Numerous topologies and modulation strategies have been introduced and studied extensively for utility and drive applications in the recent literature [1], [2]. These converters are ...
... Multilevel power conversion has been receiving increasing attention in the past few years for high power applications. Numerous topologies and modulation strategies have been introduced and studied extensively for utility and drive applications in the recent literature [1], [2]. These converters are ...
DC MOTOR CONTROLLER USING LINEAR QUADRATIC
... Linear Quadratic Regulator (LQR) algorithm is one of the controller methods to control a system. In this project, the LQR was implemented on the PIC microcontroller to control the dc motor. The main objective of this controller is to minimize the deviation of the speed of dc motor. Dc motor speed is ...
... Linear Quadratic Regulator (LQR) algorithm is one of the controller methods to control a system. In this project, the LQR was implemented on the PIC microcontroller to control the dc motor. The main objective of this controller is to minimize the deviation of the speed of dc motor. Dc motor speed is ...
IOSR Journal of Electronicsl and Communication Engineering (IOSR-JECE)
... The controllable range of the TCR firing angles of T1 and T2, are extends from 90° to 180° and 270° to 360° respectively. A firing angle of 90° for T1 and 270° for T2, results in full thyristor conduction with a continuous sinusoidal current flow in the TCR. As the firing angle is varied from 90° to clo ...
... The controllable range of the TCR firing angles of T1 and T2, are extends from 90° to 180° and 270° to 360° respectively. A firing angle of 90° for T1 and 270° for T2, results in full thyristor conduction with a continuous sinusoidal current flow in the TCR. As the firing angle is varied from 90° to clo ...
KE2316991705
... power sources, such as wind turbines and low-carbon-emission hybrid electric vehicles (HEVs) is progressing rapidly. One of the most common applied converters in hybrid systems is the ac/dc/ac converter because it has the ability of connecting to two different power sources. The generator mainly sup ...
... power sources, such as wind turbines and low-carbon-emission hybrid electric vehicles (HEVs) is progressing rapidly. One of the most common applied converters in hybrid systems is the ac/dc/ac converter because it has the ability of connecting to two different power sources. The generator mainly sup ...
5B30 数据手册DataSheet 下载
... designers and end users in measurement and control applications. Typical uses include microcomputer-based measurement systems, standard data acquisition systems, programmable controllers, analog recorders and dedicated control systems. The 5 B series modules are ideally suited to applications where ...
... designers and end users in measurement and control applications. Typical uses include microcomputer-based measurement systems, standard data acquisition systems, programmable controllers, analog recorders and dedicated control systems. The 5 B series modules are ideally suited to applications where ...
Journal of Electronicsl and Communication Engineering (IOSR-JECE)
... eliminated by using advanced modulation strategies such as that proposed in . ● Input current: Multilevel converters can draw input current with low distortion. ● Switching frequency: Multilevel converters can operate at both fundamental switching frequency and high switching frequency PWM. It shoul ...
... eliminated by using advanced modulation strategies such as that proposed in . ● Input current: Multilevel converters can draw input current with low distortion. ● Switching frequency: Multilevel converters can operate at both fundamental switching frequency and high switching frequency PWM. It shoul ...
Fault Finding
... - In analogue circuits (amplifiers, radios etc) you can also measure Vce (the voltage across the collector and emitter). Vce should usually be greater than zero but less than the supply voltage. - In digital circuits (using CMOS chips, that is chips with numbers starting with 40...) all points shoul ...
... - In analogue circuits (amplifiers, radios etc) you can also measure Vce (the voltage across the collector and emitter). Vce should usually be greater than zero but less than the supply voltage. - In digital circuits (using CMOS chips, that is chips with numbers starting with 40...) all points shoul ...
FO2611711176
... with experimental data from the prototype system, which was implemented using an FPGA and a discrete digital to analog converter. Direct Digital frequency Synthesizers (DDS) are a common component in a variety of communication systems, especially those requiring fast frequency hopping, low power dis ...
... with experimental data from the prototype system, which was implemented using an FPGA and a discrete digital to analog converter. Direct Digital frequency Synthesizers (DDS) are a common component in a variety of communication systems, especially those requiring fast frequency hopping, low power dis ...
PDF
... Most of the PV systems are designed with transformer for safety purpose with galvanic isolation. However, the transformer is big, heavy and expensive. Also, it reduces the overall frequency of the conversion stage. Generally PV inverter with transformer is having good efficiency. To overcome these p ...
... Most of the PV systems are designed with transformer for safety purpose with galvanic isolation. However, the transformer is big, heavy and expensive. Also, it reduces the overall frequency of the conversion stage. Generally PV inverter with transformer is having good efficiency. To overcome these p ...
PDF
... high, medium or low power mode. For these reasons, various techniques have been used in recent mobile phones such as using a DC/DC converter with a variable output voltage(1), and switching multiple power amplifiers or paths having different output levels(2). Meanwhile, in a terminal, a transmission ...
... high, medium or low power mode. For these reasons, various techniques have been used in recent mobile phones such as using a DC/DC converter with a variable output voltage(1), and switching multiple power amplifiers or paths having different output levels(2). Meanwhile, in a terminal, a transmission ...
Power Supply and Instrumentation Division
... cool, the temperature in the reference and DAC circuit is set above the room temperature to 37ºC. Three-loop regulation topology for precision high current magnet power supply: The dc precision of a magnet power supply, which generally defines the absolute tolerance of its current, can be split up i ...
... cool, the temperature in the reference and DAC circuit is set above the room temperature to 37ºC. Three-loop regulation topology for precision high current magnet power supply: The dc precision of a magnet power supply, which generally defines the absolute tolerance of its current, can be split up i ...
instructions to tenderers
... CIRCUIT BREAKER MODULE - protective device that in this trainer shall be used to disconnect the system of generation of wind energy from the mains. It must be also used as a security device for any failure or accidental short circuits. The module must be constituted by an automatic differential swit ...
... CIRCUIT BREAKER MODULE - protective device that in this trainer shall be used to disconnect the system of generation of wind energy from the mains. It must be also used as a security device for any failure or accidental short circuits. The module must be constituted by an automatic differential swit ...
UPS Operating Modes: A Global Standard
... eliminating the largest range of power problems in the process. It was unusual for a manufacturer to highlight the fact that their UPS might be “single conversion” as this was considered to be a lower standard of performance, particularly in large threephase application. ...
... eliminating the largest range of power problems in the process. It was unusual for a manufacturer to highlight the fact that their UPS might be “single conversion” as this was considered to be a lower standard of performance, particularly in large threephase application. ...
IO-IIM Input Isolation Modules
... The IO-IIM-V and IO-IIM-I modules each provide complete electrical isolation from the supply and sensor input to the output. Each comprises an opto-isolator with an integral power supply which powers the electronics and, if required the sensor. A controller or an external power supply provides 24Vac ...
... The IO-IIM-V and IO-IIM-I modules each provide complete electrical isolation from the supply and sensor input to the output. Each comprises an opto-isolator with an integral power supply which powers the electronics and, if required the sensor. A controller or an external power supply provides 24Vac ...
Installation Instructions
... The LVSW series low voltage switch is intended for use with lighting control devices that expect a momentary contact closure to toggle the state of the lighting load. Each button on the LVSW switch has an LED indicator intended to display the current state of the lighting load when connected appropr ...
... The LVSW series low voltage switch is intended for use with lighting control devices that expect a momentary contact closure to toggle the state of the lighting load. Each button on the LVSW switch has an LED indicator intended to display the current state of the lighting load when connected appropr ...
PDF document
... step-up regulator. The evaluation board demonstrates suggested size and placement of external components to maintain output voltage regulation for up to 250mA of output current. The external components were selected to suit portable applications where the layout has been optimized to achieve high ef ...
... step-up regulator. The evaluation board demonstrates suggested size and placement of external components to maintain output voltage regulation for up to 250mA of output current. The external components were selected to suit portable applications where the layout has been optimized to achieve high ef ...
GFX-15 - Crate
... Important Safeguards and Precautions: All Crate products are designed for continuous safe operation, as long as common sense is used and steps are taken to help avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others. • The amplifier is e ...
... Important Safeguards and Precautions: All Crate products are designed for continuous safe operation, as long as common sense is used and steps are taken to help avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others. • The amplifier is e ...
FFmanualBasic.cwk .cwk
... Audio Input, Signal Gain Pot, Clip LED: The core of the filter will start to clip at around 4 V, so input signals can be scaled by the Signal Gain pot as required. The pot is actually an attenuator, so the maximum gain is one. The clipping LED will start to flash when overload is detected. Overloadi ...
... Audio Input, Signal Gain Pot, Clip LED: The core of the filter will start to clip at around 4 V, so input signals can be scaled by the Signal Gain pot as required. The pot is actually an attenuator, so the maximum gain is one. The clipping LED will start to flash when overload is detected. Overloadi ...
Marquez2009-Modeling-MicroHydropowerPlants.pdf
... (VSI) using IGBTs is employed for connecting to the grid. As the power rating of the inverter is intermediate to small, the output voltage control of the VSI can be achieved through pulse width modulation (PWM) techniques. The three-level VSI topology is proposed above other ones because generates a ...
... (VSI) using IGBTs is employed for connecting to the grid. As the power rating of the inverter is intermediate to small, the output voltage control of the VSI can be achieved through pulse width modulation (PWM) techniques. The three-level VSI topology is proposed above other ones because generates a ...
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.