NATF Load Modeling Practices
... • Large commercial buildings have central cooling systems • Chiller compressors are large motors 200-500 HP • Motor protection & control: ...
... • Large commercial buildings have central cooling systems • Chiller compressors are large motors 200-500 HP • Motor protection & control: ...
Spread Aware™, Ten/Eleven Output Zero Delay Buffer
... Spread Spectrum Frequency Timing Generation. Cypress has been one of the pioneers of SSFTG development, and we designed this product so as not to filter off the Spread Spectrum feature of the Reference input, assuming it exists. When a zero delay buffer is not designed to pass the SS feature through ...
... Spread Spectrum Frequency Timing Generation. Cypress has been one of the pioneers of SSFTG development, and we designed this product so as not to filter off the Spread Spectrum feature of the Reference input, assuming it exists. When a zero delay buffer is not designed to pass the SS feature through ...
MAX9710/MAX9711 3W Mono/Stereo BTL Audio Power Amplifiers with Shutdown General Description
... PC99/01 compliant, operate from a single 4.5V to 5.5V supply, and feature an industry-leading 100dB PSRR, which allows these devices to operate from noisy supplies without additional, costly power-supply conditioning. An ultra-low 0.005% THD+N ensures clean, low-distortion amplification of the audio ...
... PC99/01 compliant, operate from a single 4.5V to 5.5V supply, and feature an industry-leading 100dB PSRR, which allows these devices to operate from noisy supplies without additional, costly power-supply conditioning. An ultra-low 0.005% THD+N ensures clean, low-distortion amplification of the audio ...
Interharmonics: Theory and Modeling
... some new problems, such as subsynchronous oscillations, voltage fluctuations, and light flicker, even for low-amplitude levels. Interharmonics can be observed in an increasing number of loads in addition to harmonics. These loads include static frequency converters, cycloconverters, subsynchronous c ...
... some new problems, such as subsynchronous oscillations, voltage fluctuations, and light flicker, even for low-amplitude levels. Interharmonics can be observed in an increasing number of loads in addition to harmonics. These loads include static frequency converters, cycloconverters, subsynchronous c ...
Lampizator
... DAC is an integrated circuit where the magical transformation of digital information into music takes place. IC chips are black and have many legs, usually 16, 20 or 28. If you can't find your DAC, better abandon the project, it may be not for you. There can be numerous chips - sometimes one, tometi ...
... DAC is an integrated circuit where the magical transformation of digital information into music takes place. IC chips are black and have many legs, usually 16, 20 or 28. If you can't find your DAC, better abandon the project, it may be not for you. There can be numerous chips - sometimes one, tometi ...
Home Voltage Stabilizer / Regulator - Ashley
... of the incoming mains supply has been considered the province of business and government organisations. However, in recent years, with a lack of general investment in new generation capacity and the failure to replace decommissioned fossil fuel and nuclear power stations, existing supply networks ar ...
... of the incoming mains supply has been considered the province of business and government organisations. However, in recent years, with a lack of general investment in new generation capacity and the failure to replace decommissioned fossil fuel and nuclear power stations, existing supply networks ar ...
Low Voltage Network Solutions Summary Report
... • Many feeders can accept very high levels of PV uptake before there is a voltage problem. For example, all of the feeders studied with less than 25 customers and 1/3 of feeders with more than 25 customers would have no voltage problems even if every customer had PV. Many other feeders have no volt ...
... • Many feeders can accept very high levels of PV uptake before there is a voltage problem. For example, all of the feeders studied with less than 25 customers and 1/3 of feeders with more than 25 customers would have no voltage problems even if every customer had PV. Many other feeders have no volt ...
Jun 1999 LTC1569-X, 10th Order, Linear
... instance, if the sampling-rate to the filter-cutoff frequency ratio is 100:1 and the input signal is sampled at both rising and falling edges of the internal clock (this is commonly called a double-sampled filter), a 3.4kHz cutoff frequency will dictate a 170kHz external or internal clock. If the sy ...
... instance, if the sampling-rate to the filter-cutoff frequency ratio is 100:1 and the input signal is sampled at both rising and falling edges of the internal clock (this is commonly called a double-sampled filter), a 3.4kHz cutoff frequency will dictate a 170kHz external or internal clock. If the sy ...
Product Brief (1200V XPT IGBTs)_15OCT12
... optimized to reduce turn-off losses and suppress ringing oscillations, thereby producing smooth switching waveforms and significantly lowering electromagnetic interference (EMI) in the process. Furthermore, due to the soft recovery characteristics of the diodes, the IGBTs can be switched on at very hi ...
... optimized to reduce turn-off losses and suppress ringing oscillations, thereby producing smooth switching waveforms and significantly lowering electromagnetic interference (EMI) in the process. Furthermore, due to the soft recovery characteristics of the diodes, the IGBTs can be switched on at very hi ...
Lionel E-Unit 00-0103-00 Theory of Operation
... This section (see Figure 1 and Figure 3) consists primarily of a two-bit binary counter (4 condition state machine) implemented in a Dual D-Type Flip/Flop (U1). Each Flip/Flop is configured as a digital Toggle Flip/Flop. The Flip/Flops are powered by VCC (which remains constant even during AC input ...
... This section (see Figure 1 and Figure 3) consists primarily of a two-bit binary counter (4 condition state machine) implemented in a Dual D-Type Flip/Flop (U1). Each Flip/Flop is configured as a digital Toggle Flip/Flop. The Flip/Flops are powered by VCC (which remains constant even during AC input ...
AN1645 - STMicroelectronics
... operation prevents secondary side shoot-through conditions providing proper timing at the outputs turnoff transition. This smart function operates through a fast cycle-after-cycle control logic mechanism based on an internal high frequency oscillator, synchronized by the clock signal. The IC provide ...
... operation prevents secondary side shoot-through conditions providing proper timing at the outputs turnoff transition. This smart function operates through a fast cycle-after-cycle control logic mechanism based on an internal high frequency oscillator, synchronized by the clock signal. The IC provide ...
DC2222A - Linear Technology
... When using the DC890 controller it is necessary to provide a low jitter 2.5VP-P (If VCCIO is in the 3.3V position, the clock amplitude should be 3.3VP-P.) sine or square wave to J1. The clock input is AC coupled so the DC level of the clock signal is not important. A clock generator like the Rohde & ...
... When using the DC890 controller it is necessary to provide a low jitter 2.5VP-P (If VCCIO is in the 3.3V position, the clock amplitude should be 3.3VP-P.) sine or square wave to J1. The clock input is AC coupled so the DC level of the clock signal is not important. A clock generator like the Rohde & ...
Using an I/O port pin as an A/D converter input
... collector, which is of course the discharge current. As the transistor base current is constant with respect to the collector current, determined by the transistor hfe value, it will have no effect on the accuracy of the circuit operation. Almost any standard NPN transistor can be used for this app ...
... collector, which is of course the discharge current. As the transistor base current is constant with respect to the collector current, determined by the transistor hfe value, it will have no effect on the accuracy of the circuit operation. Almost any standard NPN transistor can be used for this app ...
PDF
... operation problem. Therefore the study of voltage collapse and Optimal Power Flow Solutions acquires a great significance and there is a need for methodologies which are able to simultaneously analyze these two aspects to indicate the behavior of power systems, being operated near the maximum loadab ...
... operation problem. Therefore the study of voltage collapse and Optimal Power Flow Solutions acquires a great significance and there is a need for methodologies which are able to simultaneously analyze these two aspects to indicate the behavior of power systems, being operated near the maximum loadab ...
ECE 5025: Power Electronics: Devices, Circuits, and Applications
... Provides an introduction to power electronic conversion principles. Analytical techniques will be developed through the study of widely used converter circuits. Prior Course Number: 624, 724 Transcript Abbreviation: Power Electronics ...
... Provides an introduction to power electronic conversion principles. Analytical techniques will be developed through the study of widely used converter circuits. Prior Course Number: 624, 724 Transcript Abbreviation: Power Electronics ...
II. Power and Control System concept
... 500MΩ. The 500MΩ “variable resistor” consists of a series connection of three phototransistors. In parallel to each Phototransistor a 166MΩ resistor is mounted so that fully dark the total resistance of the string will be approximately 500MΩ. The PWM control signal from the microcontroller is low pa ...
... 500MΩ. The 500MΩ “variable resistor” consists of a series connection of three phototransistors. In parallel to each Phototransistor a 166MΩ resistor is mounted so that fully dark the total resistance of the string will be approximately 500MΩ. The PWM control signal from the microcontroller is low pa ...
MD Series Spec - Controlled Power Company
... This specification defines the electrical and mechanical characteristics and requirements for an uninterruptible power supply (UPS) system. The system as specified herein shall include all the components required to deliver reliable, high quality uninterruptible power for critical loads. The system ...
... This specification defines the electrical and mechanical characteristics and requirements for an uninterruptible power supply (UPS) system. The system as specified herein shall include all the components required to deliver reliable, high quality uninterruptible power for critical loads. The system ...
California Instruments CS series current source
... AC Current Sources are useful in a variety of applications where precision is required; including precise evaluation of circuit breakers, overload relays, bi-metal temperature sensors and heating elements. Another common application is non-destructive testing of fuses. The arbitrary waveform capabil ...
... AC Current Sources are useful in a variety of applications where precision is required; including precise evaluation of circuit breakers, overload relays, bi-metal temperature sensors and heating elements. Another common application is non-destructive testing of fuses. The arbitrary waveform capabil ...
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.