Method for conditioning a power supply for starting a jet engine
... supply 12, AC S/G 18, APU 30 to ultimately provide a power ...
... supply 12, AC S/G 18, APU 30 to ultimately provide a power ...
MAX1879 Simple, Efficient, 1-Cell Li+ Pulse Charger General Description Features
... Once cell conditions are determined to be satisfactory, the MAX1879 fast-charges the Li+ cell by pulling GATE low, turning on the external PMOS FET. Cell charging current is set by the current limit of the external power supply; it is not regulated by the MAX1879. The PMOS FET operates only as a swi ...
... Once cell conditions are determined to be satisfactory, the MAX1879 fast-charges the Li+ cell by pulling GATE low, turning on the external PMOS FET. Cell charging current is set by the current limit of the external power supply; it is not regulated by the MAX1879. The PMOS FET operates only as a swi ...
Evaluation of Magnetic Materials for Very High Frequency Power
... by varying the amplitude of the rf source. The current of the inductor is equal to the capacitor current and can be calculated from the output voltage and the known capacitor impedance. (These considerations motivate the use of high-precision lowloss capacitors such as mica or porcelain capacitors. ...
... by varying the amplitude of the rf source. The current of the inductor is equal to the capacitor current and can be calculated from the output voltage and the known capacitor impedance. (These considerations motivate the use of high-precision lowloss capacitors such as mica or porcelain capacitors. ...
FDML7610S PowerTrench Power Stage
... 1. Input ceramic bypass capacitors C1 and C2 must be placed close to the D1 and S2 pins of Power Stage to help reduce parasitic inductance and high frequency conduction loss induced by switching operation. C1 and C2 show the bypass capacitors placed close to the part between D1 and S2. Input capaci ...
... 1. Input ceramic bypass capacitors C1 and C2 must be placed close to the D1 and S2 pins of Power Stage to help reduce parasitic inductance and high frequency conduction loss induced by switching operation. C1 and C2 show the bypass capacitors placed close to the part between D1 and S2. Input capaci ...
Application Note - Atmel Corporation
... meter, ground of the MCU can also be connected to the phase line and MCU connects to the metering IC directly. In a typical application, shunt resistor is generally used for phase line (L line) current sampling. To ensure isolation between phase line (L line) and neutral line (N line), Current Trans ...
... meter, ground of the MCU can also be connected to the phase line and MCU connects to the metering IC directly. In a typical application, shunt resistor is generally used for phase line (L line) current sampling. To ensure isolation between phase line (L line) and neutral line (N line), Current Trans ...
S. Lim, J. Ranson, D.M. Otten and D.J. Perreault, Two-Stage Power Conversion Architecture Suitable for Wide Range Input Voltage, IEEE Transactions on Power Electronics , Vol. 30, No. 2, pp. 805-816, Feb. 2015.
... in each state and conversion mode, and Table III presents the circuit configuration with this switch operation, where the current source iint models the time-averaged currents drawn by the high-frequency regulation stage. Additionally, our system is designed to “merge” operation of the two stages. A ...
... in each state and conversion mode, and Table III presents the circuit configuration with this switch operation, where the current source iint models the time-averaged currents drawn by the high-frequency regulation stage. Additionally, our system is designed to “merge” operation of the two stages. A ...
Mazda 626 GE 2.0 FS
... to a mall functioning system, the valve is forced into a position which results in a (too) high idle speed. The idle control valve has a connector with two terminals. On one of those terminals is connected to the battery voltage. This supply-voltage is often switched with a relay. The other terminal ...
... to a mall functioning system, the valve is forced into a position which results in a (too) high idle speed. The idle control valve has a connector with two terminals. On one of those terminals is connected to the battery voltage. This supply-voltage is often switched with a relay. The other terminal ...
Loop Calibrator 4-20ma
... select the “DIAL” position. The Model CL309A will remember the last “DIAL” value, even with the power off. Note: The same “DIAL” value is stored for both mA and %. The recalled value will be displayed in the units selected. ...
... select the “DIAL” position. The Model CL309A will remember the last “DIAL” value, even with the power off. Note: The same “DIAL” value is stored for both mA and %. The recalled value will be displayed in the units selected. ...
Vol.149, Complete PDF Edition
... overtemperature protection (OT) or analog temperature output (VOT) circuit. The short-circuit protection circuit detects an overcurrent using an external shunt resistor, feeds it back to the LVIC to shut off the IGBTs, and outputs an error signal if the undervoltage protection circuit for the contro ...
... overtemperature protection (OT) or analog temperature output (VOT) circuit. The short-circuit protection circuit detects an overcurrent using an external shunt resistor, feeds it back to the LVIC to shut off the IGBTs, and outputs an error signal if the undervoltage protection circuit for the contro ...
High-Power GaAs FET Device Bias
... diagram. Figure 5 illustrates a circuit used when the biasing circuit has no matching function. In this case the gate resistance is placed as close as possible to the device gate for better protection again ESDs and oscillations. The impedance of this circuit in parallel to the input matching circui ...
... diagram. Figure 5 illustrates a circuit used when the biasing circuit has no matching function. In this case the gate resistance is placed as close as possible to the device gate for better protection again ESDs and oscillations. The impedance of this circuit in parallel to the input matching circui ...
Fundamentals of Electrical Power Measurement
... to convert analog signals to digital form. higher end analyzers use DIGITAL SIGNAL PROCESSING techniques to determine values Digital Power Oscilloscopes use SPECIAL FIRMWARE to make true power measurements Digitizing instruments are somewhat RESTRICTED because it is a sampled data technique Many P ...
... to convert analog signals to digital form. higher end analyzers use DIGITAL SIGNAL PROCESSING techniques to determine values Digital Power Oscilloscopes use SPECIAL FIRMWARE to make true power measurements Digitizing instruments are somewhat RESTRICTED because it is a sampled data technique Many P ...
Lab 3
... Kenwood, but your team may be using a different brand of power supply.) Be sure to plug in the DC Power Supply. Be sure the knobs are turned all the way down. iv) Use the 0-50A DC ammeter and an insertion plug to measure Iagen in Line 1 on the generator test table. Remember the proper method from DC ...
... Kenwood, but your team may be using a different brand of power supply.) Be sure to plug in the DC Power Supply. Be sure the knobs are turned all the way down. iv) Use the 0-50A DC ammeter and an insertion plug to measure Iagen in Line 1 on the generator test table. Remember the proper method from DC ...
Document
... 19--9: Core Losses Hysteresis losses The hysteresis losses result from the additional power needed to reverse the magnetic field in magnetic materials in the presence of alternating current. The greater the frequency, the more hysteresis loss. Air-core coils Air has practically no losses from ...
... 19--9: Core Losses Hysteresis losses The hysteresis losses result from the additional power needed to reverse the magnetic field in magnetic materials in the presence of alternating current. The greater the frequency, the more hysteresis loss. Air-core coils Air has practically no losses from ...
CAT4003B - Constant Current Programmable LED Driver
... must remain high for at least TSETUP delay (10 ms minimum) to allow the LED driver to complete its power−up. After this delay, EN/DIM can be pulsed in order to set the LED current to the desired level. Each pulse width should be between 1 ms and 500 ms. Pulses faster than the minimum TLO may be igno ...
... must remain high for at least TSETUP delay (10 ms minimum) to allow the LED driver to complete its power−up. After this delay, EN/DIM can be pulsed in order to set the LED current to the desired level. Each pulse width should be between 1 ms and 500 ms. Pulses faster than the minimum TLO may be igno ...
Lecture notes - Newcastle University Staff Publishing Service
... in magnitude or modified in some way before display. The process of preparing the signal before display or recording is referred to as signal conditioning. A signal conditioning device may have one or all of the following functions: 1). Amplification. The weak signal from the transducer is increased ...
... in magnitude or modified in some way before display. The process of preparing the signal before display or recording is referred to as signal conditioning. A signal conditioning device may have one or all of the following functions: 1). Amplification. The weak signal from the transducer is increased ...
MAX8505 3A, 1MHz, 1% Accurate, Internal Switch Step-Down Regulator with Power-OK General Description
... The MAX8505 step-down regulator operates from a 2.6V to 5.5V input and generates an adjustable output voltage from 0.8V to 0.85 VIN at up to 3A. With a 2.6V to 5.5V bias supply, the input voltage can be as low as 2.25V. The MAX8505 integrates power MOSFETs and operates at 1MHz/500kHz switching fre ...
... The MAX8505 step-down regulator operates from a 2.6V to 5.5V input and generates an adjustable output voltage from 0.8V to 0.85 VIN at up to 3A. With a 2.6V to 5.5V bias supply, the input voltage can be as low as 2.25V. The MAX8505 integrates power MOSFETs and operates at 1MHz/500kHz switching fre ...
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.