• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
AN ELECTROMAGNETIC ENERGY SCAVENGER FROM DIRECT AIRFLOW
AN ELECTROMAGNETIC ENERGY SCAVENGER FROM DIRECT AIRFLOW

PowerPoint-presentasjon
PowerPoint-presentasjon

... Abstract— The new ultra thin wafer technology makes it possible to make Non Punch Through (NPT) IGBTs in the 600V range, with a lightly doped collector. This new IGBT technology is tested and compared with other competitive transistor technologies. The case study of the Zero Voltage Switching (ZVS) ...
Pressure regulator circuit description
Pressure regulator circuit description

... Its output is decoupled by C6 (1n) and fed through resistor R1 (10k), to the inverting (-) input (pin 6) of IC1B (LM324), a unity gain inverting amplifier. R1 and R3, both 10k, set the gain to -1 (unity) and R2 (5.1k) sets the input current of the non-inverting (+) input (pin 5) approx. equal to tha ...
Bip Transistor 50V, 2A PNP MP
Bip Transistor 50V, 2A PNP MP

... Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpos ...
Pressure regulator circuit description
Pressure regulator circuit description

Dual impedance digital multimeters— What`s the point?
Dual impedance digital multimeters— What`s the point?

... today for testing industrial, electrical, and electronic systems have high impedance input circuits greater than 1 megohm. In simple terms this means that when the DMM is placed across a circuit for a measurement, it will have little impact on circuit performance. This is the desired effect for ...
Power 2π- Mobile Bicycle Generator
Power 2π- Mobile Bicycle Generator

... The image above shows how adding a capacitor to the load of a full wave rectifier can affect the output signal of the rectifier. Note that the gray dotted line depicts the rectified output without a capacitive load; this rectified waveform has a large variation in instantaneous values, which is not ...
Tempus JPCR 530194-2012 Energy Efficiency, Renewable Energy Sources and Environmental
Tempus JPCR 530194-2012 Energy Efficiency, Renewable Energy Sources and Environmental

... the actual frequency f1 before the incident (f1 is different from f0 in our case) the maximum frequency deviation ∆f2 after the incident, with respect to the set-point f0 the loss of generating capacity ∆Pa responsible for the incident. ...
File g3500
File g3500

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... A load flow study for the considered test system is conducted using Newton-Raphson method [14]. The bus voltage of the system without FACTS (base case) is shown in Fig. 4. From this Figure it can be seen that the us 5 has the lowest voltage magnitude compared to other buses. To analyze the static vo ...


LM4804 Low Voltage High Power Audio Power Amplifier (Rev. C)
LM4804 Low Voltage High Power Audio Power Amplifier (Rev. C)

... “bridged mode” is established. Bridged mode operation is different from the classical single-ended amplifier configuration where one side of the load is connected to ground. A bridge amplifier design has a few distinct advantages over the single-ended configuration, as it provides differential drive ...
SCM5B48-02 Accelerometer Input Module
SCM5B48-02 Accelerometer Input Module

... Six poles of signal filtering in the SCM5B48 module result in greater than 100dB of normal-mode rejection for signal frequencies above the cutoff frequency. One pole of filtering is on the field side of the isolation barrier for anti-aliasing purposes and the remaining five-pole programmable Bessel ...
AH5795  SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER
AH5795 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER

... Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any c ...
Steering in the right direction
Steering in the right direction

... This article was published on EDN: http://www.edn.com/design/powermanagement/4416874/Why-bypass-caps-make-a-difference---Part-6--Simulating-thecomplete-op-amp-PS-circuitThis is the last of the “Yet more...” series. One final plot twist, a moderately satisfying ending, and my work here will be done. ...
Network effects of line start permanent magnet synchronous motors
Network effects of line start permanent magnet synchronous motors

... for starting and running. Its main advantage over an induction machine is that its efficiency can be considerably higher: losses during normal running can be halved, due to the reduction of magnetising current in the stator and the absence of copper losses in the rotor. Pure permanent-magnet machine ...
AND8296/D Increasing Low Power Converter Efficiency with
AND8296/D Increasing Low Power Converter Efficiency with

Motion control unit
Motion control unit

... test and monitoring functions including a 4-channel software oscilloscope. ...
Valve (Tube) Regulated Power Supplies
Valve (Tube) Regulated Power Supplies

... can be less stressful on the smoothing or input electrolytic. The downside to a valve rectifier is the voltage drop across it, which can easily be more than 25V compared to the semiconductor diode’s. You may need to calculate this into the DC supply to the regulator. It effectively increases the imp ...
AC Machines - UniMAP Portal
AC Machines - UniMAP Portal

CA-NLH-106 Island Interconnected System Supply Issues and Power Outages Reference:  PUB-NLH-470:
CA-NLH-106 Island Interconnected System Supply Issues and Power Outages Reference: PUB-NLH-470:

... and will be factory tested with the polarity reversal. Please also provide the ...
Sep 2003 Low Voltage Amplifiers Give Choice of Accuracy or Speed
Sep 2003 Low Voltage Amplifiers Give Choice of Accuracy or Speed

... the system bus voltage requirements can no longer be met, the LTC1980 switches to the regulator mode. In this mode the LTC1980 no longer functions as a battery charger. It instead acts as a battery discharger. Power flows “backwards” from the battery to the linear regulator. The output voltage of th ...
3-phase short-circuit current (Isc) at any point within a LV installation
3-phase short-circuit current (Isc) at any point within a LV installation

... circuit current in kA U20: Phase-to-phase no-load secondary voltage of MV/LV transformer (in volts). Psc: 3-phase short-circuit power at MV terminals of the MV/LV transformers (in kVA). Pcu: 3-phase total losses of the MV/LV transformer (in watts)., Pn: Rating of the MV/LV transformer (in kVA). Usc: ...
Goodwin`s High End - Spectr
Goodwin`s High End - Spectr

... The very high-speed launch and enormous current reserves of the DMA-360 Series 2 are made possible with the use of Spectral's proprietary "Focused Array" construction. This breakthrough topology aligns high-current vertical FET output devices for rapid, pistonic signal launch. The output section is ...
MAX9632 36V, Precision, Low-Noise, Wide-Band Amplifier EVALUATION KIT AVAILABLE
MAX9632 36V, Precision, Low-Noise, Wide-Band Amplifier EVALUATION KIT AVAILABLE

< 1 ... 802 803 804 805 806 807 808 809 810 ... 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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report