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1 - Electrical Engineering and Computer Science
1 - Electrical Engineering and Computer Science

iSOLATeD DC/DC COnTrOLLerS fOr inTerMeDiATe BuS vOLTAgeS
iSOLATeD DC/DC COnTrOLLerS fOr inTerMeDiATe BuS vOLTAgeS

... to 75 V and comfortably handle 100-V transients for 100 ms in compliance with ETSI 300-132-2. Integrated ±1.6-A high-voltage MOSFET drivers allow each IC to drive both the low- and high-side switching devices in a half-bridge converter. The oscillator frequency is programmable from 200 kHz to 1 MHz, ...
FET Dream User`s Guide
FET Dream User`s Guide

Specifying High Voltage Power Supplies
Specifying High Voltage Power Supplies

... or sometimes electronic ripple canceling circuits, may be used. When filtering components, such as shunt capacitors or series resistors or inductors, are added to reduce the ripple, they introduce a delay in the control loop circuits which adversely affects the response time of the supply to changes ...
(PROsine) Pure Sine Wave Inverters
(PROsine) Pure Sine Wave Inverters

Introductory Power Electronics
Introductory Power Electronics

... Voltage ripple (+-50 mV, or 5%) Isolation (e.g., 1,500 V ac for 1 min.) Load regulation (e.g., 3%) Dynamic response (transients, wake-up time, etc.) Short circuit protection OC protection OV protection OT protection ...
INVERTERS: The Investigation to the optimal topology to the
INVERTERS: The Investigation to the optimal topology to the

... • Fuse with diode - chosen – Advantages • Fuse is required in any way, no consumption during working assist with efficiency – Disadvantages • Fuse serviceable item FUSE ...
General Licensing Class
General Licensing Class

... B. The diode prevents self discharge of the battery through the panel during times of low or no illumination. C. The diode limits the current flowing from the panel to a safe value. D. The diode greatly increases the efficiency during times of high illumination. ...
pub3241csoftstartersforelectricmotors
pub3241csoftstartersforelectricmotors

PowaTRIM Theory of Operation.
PowaTRIM Theory of Operation.

... This negative current is achieved in the winding direction of the choke coils and reactors. Let us assume we are looking at phase B. When phase C and phase A are magnetically induced in phase B, they are subjected to a 180-degrees phase shift as they pass through the choke coils. The wave form in ph ...
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ONS321A5VGEVB, ONS321B12VGEVB ONS321A5VGEVB/ Evaluation Board User's

... (i) DC Supply Source for Input Voltage The input voltage source should be a 0 to 20 V DC source. The input voltage may be increased further depending on the parts that are being used on the ONS321G evaluation board such that the part can withstand the applied voltage. Hence, based on the required in ...
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How to Connect and Test a Proportional Model

... To test under Light Load conditions, slowly increase the low voltage DC supply to the XP EMCO unit. When the DC input is >0.7VDC, there should be a high voltage output on the XP EMCO unit. Continue to increase the input voltage until the unit reaches its maximum rated output voltage. Under this cond ...
mcor30 technical manual
mcor30 technical manual

... signal is fed back to the error amplifier, while the other is sent back to the control system as a redundant current monitor signal. 2.2.3 Error Amplifier and PWM Controller. The unity gain differential amplifier (U1) receives and isolates the analog command signal from the control system. The high ...
"Improved Start-up Performance for Charge Pumps TPS6030x"
"Improved Start-up Performance for Charge Pumps TPS6030x"

... that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such products or services might be or are used. TI’s publication of information ...
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PS-1A Power Supply

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WWW Development and Applications

... » Using multiple supply voltages (normal supply for timing critical paths, and reduced supply voltage for non-critical paths) » Technology independent optimization using Kernel extraction methods (not only to reduce literal count) but also to reduce switching activity ...
UMJ-910-D14-G VOLTAGE CONTROLLED OSCILLATOR FOR IF CONVERSION Features
UMJ-910-D14-G VOLTAGE CONTROLLED OSCILLATOR FOR IF CONVERSION 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 ...
Full Text PDF - AE International Journal of Science and Technology
Full Text PDF - AE International Journal of Science and Technology

... In MMC, number of Sub-modules can be connected in cascaded manner without increasing the complexity of the circuit. The converter arm represents a controllable voltage source controlled with modulation techniques to get the desired output. The main advantages of MMC 1) The internal arm currents are ...
Data Sheet - KB Electronics
Data Sheet - KB Electronics

Teledyne LeCroy Launches RP4030 Active Voltage Rail Probe and
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... The RP4030 has a large (±30V) built-in offset range, low attenuation (1.2x), and high DC input impedance (50 kΩ). This combination of capabilities permits acquisition of DC power/voltage rails with offset equal to the nominal DC rail voltage thereby permitting the DC signal to be centered on the osc ...
THREE PHASE INVERTER DEVELOPMENT USING COMMON
THREE PHASE INVERTER DEVELOPMENT USING COMMON

... Most modern power inverters produce either modified square (or modified sine) waves, or pure sine (or true sine) waves. Modified square wave inverters don't provide the smooth peaks and valleys that AC power from a home's electrical outlet does, but it can deliver power that is consistent and effici ...
Serializer/Deserializer Output Data Signal Duty Cycle
Serializer/Deserializer Output Data Signal Duty Cycle

revelite al technical spec sheet
revelite al technical spec sheet

... The following information is provided to help specify a Revelite AL for a given piece of artwork or display. When properly selected, the Revelite AL will illuminate the desired illumination area with vertical and horizontal uniformity. The AL emits exceptionally high quality LED light that renders c ...
Download T2900 Datasheet
Download T2900 Datasheet

... The T2900 3-Phase Differential Relay is designed for monitoring current leakage in generators. The T2900 measures the differential current of each of the 3 phases. The differential currents are measured by connecting a current transformer for each winding in parallel with inverse polarity. The highe ...
Design Note - Texas Instruments
Design Note - Texas Instruments

... voltage that is higher, lower or equal to the input. Conversion is performed without the use of expensive transformers, making this a good choice for low cost, non-isolated applications. The UC2577 provides the switch and control to take advantage of this topology with a minimum of additional parts. ...
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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.
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