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Chapter 11 Amplifiers: Specifications and External Characteristics
Chapter 11 Amplifiers: Specifications and External Characteristics

... 7. Specify the pulse-response parameters of amplifiers. 8. Work with differential amplifiers and specify common-mode rejection requirements. 9. Understand the various sources of dc offsets and design balancing circuits. ...
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... Resistor Value (from code) _________________ +/- ______________ Slope of plot ____________________________ +/- ______________ ...
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LF451 Wide-Bandwidth JFET-Input Operational Amplifier
LF451 Wide-Bandwidth JFET-Input Operational Amplifier

... forced to a high state. The amplifier will operate with a common-mode input voltage equal to the positive supply; however, the gain bandwidth and slew rate may be decreased in this condition. When the negative common-mode voltage swings to within 3V of the negative supply, an increase in input offse ...
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Induction Motors

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BP5033-12
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... shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability th ...
Let Your Light Shine
Let Your Light Shine

... across a three phase system by monitoring the voltage and current only in a single phase. Three phase voltage sensing does a mathematical calculation by electronics based on the current and voltage of all three phases and sets the system voltage accordingly. The electrical power produced by the sync ...
POWER ELECTRONICS NOTES 10ES45
POWER ELECTRONICS NOTES 10ES45

MC34152 - High Speed Dual MOSFET Drivers
MC34152 - High Speed Dual MOSFET Drivers

... pulldown resistor to keep the MOSFET gate low when VCC is less than 1.4 V. No over current or thermal protection has been designed into the device, so output shorting to VCC or ground must be avoided. Parasitic inductance in series with the load will cause the driver outputs to ring above VCC during ...
B - Rutgers
B - Rutgers

... connected to a 110-V line, and when the motor reaches full speed against its normal load, the back emf is 98 V. Calculate (a) the current into the motor when it is just starting up, and (b) the current when the motor reaches full speed. ...
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ACDSee HP Version print job
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... load. A reference voltage applied to an ideal reference load will generate sinusoidal and balanced currents, in phase with voltages. Anything which produces a no conformity respect to these reference conditions, supposes a poor electric power quality. Moreover, all the compensation devices must achi ...
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98% Efficient Single-Stage AC/DC Converter Topologies

... Bridgeless PFC converters, one for each phase, of the type shown in Figure 8. Additional important efficiency and size advantages are obtained as well. For example, the total power is delivered through three parallel paths so that each phase processes only one third of total output power. The overal ...
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... The modern world is dealing with problem of power quality deterioration. Power quality is an issue that is becoming increasingly important to electricity consumers at all levels. The characteristics of power quality enable the power supply to work properly. Power quality refers to maintain a near si ...
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... system with the fewest number of external size components. This family of high current, Actual 4mm high voltage, ultra-miniature DC/DC buck 7mm x regulators greatly simplifies the complex task of designing power solutions for next generation electronics applications. ...
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J.M. Rivas, O. Leitermann, Y. Han, and D.J. Perreault, “A Very High Frequency dc-dc Converter Based on a Class Phi-2 Resonant Inverter,” IEEE Transactions on Power Electronics , Vol. 26, No. 10, pp. 2980-2992, Oct. 2011.
J.M. Rivas, O. Leitermann, Y. Han, and D.J. Perreault, “A Very High Frequency dc-dc Converter Based on a Class Phi-2 Resonant Inverter,” IEEE Transactions on Power Electronics , Vol. 26, No. 10, pp. 2980-2992, Oct. 2011.

... Regulation of the converter output voltage can be achieved through on/off control of the inverter [9]–[12], [14]–[17]. In this approach, the power stage is gated on and off at a modulation frequency that is far lower than the inverter switching frequency. By controlling the fraction of time that the ...
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... the high performance need. •With scaling down of the supply voltage threshold voltage of the devices has also scaled down to meet the performance. ...
Electricity and Energy – Build Your Own “Perpetual Motion” Machine
Electricity and Energy – Build Your Own “Perpetual Motion” Machine

< 1 ... 910 911 912 913 914 915 916 917 918 ... 1315 >

Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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