application note uc3842/3/4/5 provides low-cost current
... simultaneously realize two conflicting objectives: good electrical performance and low cost. The UC3842/3/4/5 is an integrated pulse width modulator (PWM) designed with both these objectives in mind. This IC provides designers an inexpensive controller with which they can obtain all the performance ...
... simultaneously realize two conflicting objectives: good electrical performance and low cost. The UC3842/3/4/5 is an integrated pulse width modulator (PWM) designed with both these objectives in mind. This IC provides designers an inexpensive controller with which they can obtain all the performance ...
AH58-59-68
... These sensor are an integrated Hall sensor with output driver designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, and a Schmitt trigger to provide switching h ...
... These sensor are an integrated Hall sensor with output driver designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, and a Schmitt trigger to provide switching h ...
rack mounting power supplies - dual tracking outputs
... supply. This will result in cooler running operation, which in turn will maximize stability and reliability. Make all connections before applying AC input power. THE SENSING TERMINALS MUST BE CONNECTED to the output terminals, either at the barrier strip on the power supply or at the load. Failure t ...
... supply. This will result in cooler running operation, which in turn will maximize stability and reliability. Make all connections before applying AC input power. THE SENSING TERMINALS MUST BE CONNECTED to the output terminals, either at the barrier strip on the power supply or at the load. Failure t ...
Alternating Current and Direct Current
... circle with the wavy line inside is the generic symbol for any AC voltage source. One might wonder why anyone would bother with such a thing as AC. It is true that in some cases AC holds no practical advantage over DC. In applications where electricity is used to dissipate energy in the form of heat ...
... circle with the wavy line inside is the generic symbol for any AC voltage source. One might wonder why anyone would bother with such a thing as AC. It is true that in some cases AC holds no practical advantage over DC. In applications where electricity is used to dissipate energy in the form of heat ...
Decentralized Qualitative Indices for Static Voltage Stability
... • Traditional power system operation is designed as a hierarchical structure. However, the assumptions underlying this hierarchical control design are not always satisfied when system experience large deviation from normal conditions. P. Kundur, “Power System Stability and Control,” pp. 27, McGraw-H ...
... • Traditional power system operation is designed as a hierarchical structure. However, the assumptions underlying this hierarchical control design are not always satisfied when system experience large deviation from normal conditions. P. Kundur, “Power System Stability and Control,” pp. 27, McGraw-H ...
Introduction to Communication Systems
... and, in this manner, we eliminate the accumulation of noise that is normal in analog transmission systems. One disadvantage is that digital transmission usually requires more bandwidth than an analog system, however, this is often more than offset by the efficiency of source coding and compression. ...
... and, in this manner, we eliminate the accumulation of noise that is normal in analog transmission systems. One disadvantage is that digital transmission usually requires more bandwidth than an analog system, however, this is often more than offset by the efficiency of source coding and compression. ...
WEG launches new cost-effective variable speed drive with
... Management Low Voltage and Medium Voltage Drive Systems Europe at WEG. “The MVW3000 is a highperformance all-in-one solution which eliminates the need for additional medium voltage switchgear. This variable speed drive system features outstanding input and output parameters, energy efficiency and hi ...
... Management Low Voltage and Medium Voltage Drive Systems Europe at WEG. “The MVW3000 is a highperformance all-in-one solution which eliminates the need for additional medium voltage switchgear. This variable speed drive system features outstanding input and output parameters, energy efficiency and hi ...
Oscilloscope 3 (vertical deflection)
... A feedback system is arranged with an amplifier such that any magnetic field present in the Hall-effect device will cause the current to be induced in to the secondary winding to counteract the magnetic field induced in the wire being used in measurement. ...
... A feedback system is arranged with an amplifier such that any magnetic field present in the Hall-effect device will cause the current to be induced in to the secondary winding to counteract the magnetic field induced in the wire being used in measurement. ...
Novel Multilevel Inverter Carrier
... SFO-PWM technique can only be used for three-phase threewire systems, and it enables the modulation index to be increased by 15% before overmodulation, or pulse dropping, occurs. The addition of this triplen-offset voltage continuously centers all of the three reference waveforms in the carrier band ...
... SFO-PWM technique can only be used for three-phase threewire systems, and it enables the modulation index to be increased by 15% before overmodulation, or pulse dropping, occurs. The addition of this triplen-offset voltage continuously centers all of the three reference waveforms in the carrier band ...
Dithering Digital Ripple Correlation Control for Maximum Power
... Measurement Windowing Noise reduces usable resolution. Noise-free code resolution defines the highest DC measurement precision Noise-free resolution is DC equivalent of ENOB for AC RMS value of the measurement noise equal to standard deviation assuming noise source near ...
... Measurement Windowing Noise reduces usable resolution. Noise-free code resolution defines the highest DC measurement precision Noise-free resolution is DC equivalent of ENOB for AC RMS value of the measurement noise equal to standard deviation assuming noise source near ...
Presentation title here
... • Radio frequency or precise analog (measuring very small voltages) circuits that require extremely low ripple & noise • Applications where VIN – VOUT is very small. • Applications that require a precisely regulated. • FPGA or Multi-Core processors that require fast transient response due to fast ch ...
... • Radio frequency or precise analog (measuring very small voltages) circuits that require extremely low ripple & noise • Applications where VIN – VOUT is very small. • Applications that require a precisely regulated. • FPGA or Multi-Core processors that require fast transient response due to fast ch ...
Download T3000 Datasheet
... Frequency Relay Description The T3000 Frequency Relay is designed for frequency monitoring on generators, bus bars or other distribution systems. The T3000 consists of two circuits, one circuit for over frequency and one for under frequency monitoring. Each circuit has individual settings for freque ...
... Frequency Relay Description The T3000 Frequency Relay is designed for frequency monitoring on generators, bus bars or other distribution systems. The T3000 consists of two circuits, one circuit for over frequency and one for under frequency monitoring. Each circuit has individual settings for freque ...
CDP68HC68W1
... changed by selecting the chip, inputting 8 bits, and deselecting the chip. By deselecting the chip, data from the first 8-bit shift register are latched into the pulse width register (PWM register). The frequency and control registers remain unchanged. The updated PWM information will appear at the ...
... changed by selecting the chip, inputting 8 bits, and deselecting the chip. By deselecting the chip, data from the first 8-bit shift register are latched into the pulse width register (PWM register). The frequency and control registers remain unchanged. The updated PWM information will appear at the ...
Analog and Digital Signals
... • Digital signal are commonly referred to as square waves or clock signals. • Their minimum value must be 0 volts, and their maximum value must be 5 volts. • They can be periodic (repeating) or non-periodic. • The time the signal is high (tH) can vary anywhere from 1% of the period to 99% of the per ...
... • Digital signal are commonly referred to as square waves or clock signals. • Their minimum value must be 0 volts, and their maximum value must be 5 volts. • They can be periodic (repeating) or non-periodic. • The time the signal is high (tH) can vary anywhere from 1% of the period to 99% of the per ...
Electrical Safety Basic Electrical Practices and Tips for Passing
... station North of the city energized the sub station without removing the grounding strap. Put the entire city in darkness until the issue was resolved. ...
... station North of the city energized the sub station without removing the grounding strap. Put the entire city in darkness until the issue was resolved. ...
a bidirectional switch based high-efficiency isolated
... The proposed method consist of full bridge inverter and the design exactly looks like series resonant converter except with addition of bidirectional switch at the secondary side of transformer. In order to reduce the switch count the method can also be implement with half bridge and push-pull conve ...
... The proposed method consist of full bridge inverter and the design exactly looks like series resonant converter except with addition of bidirectional switch at the secondary side of transformer. In order to reduce the switch count the method can also be implement with half bridge and push-pull conve ...
Test Procedure for the NCL30000LED1GEVB Evaluation Board
... high power factor single-stage off-line power supply intended to provide a constant current output for powering high brightness LEDs. This circuit supports both leading (triac) and trailing (electronic) phase-control dimmer operation. The output has over current, over temperature, and open load prot ...
... high power factor single-stage off-line power supply intended to provide a constant current output for powering high brightness LEDs. This circuit supports both leading (triac) and trailing (electronic) phase-control dimmer operation. The output has over current, over temperature, and open load prot ...
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.