• Study Resource
  • Explore
    • 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
Full Report - Cornell ECE
Full Report - Cornell ECE

... (roughly two octaves’ worth) at varying volumes (roughly 8-10 distinct volumes) will come out of the speaker at the output. Traditional Theremin: The Theremin is a musical instrument created by Lev Termen (also spelled Leon Theremin) in 1917, with two antennas—one vertical and one horizontal. It is ...
MAX98302 Stereo 2.4W Class D Amplifier General Description Features
MAX98302 Stereo 2.4W Class D Amplifier General Description Features

AD9631
AD9631

Document
Document

... These graphs strongly resemble those that one would expect to see in case of simple electrical circuit with direct current and constant resistance. Though, it is seen that the curves do not trend to zero, as it would be for a simple resistor. ...
ADM660 数据手册DataSheet 下载
ADM660 数据手册DataSheet 下载

... The switched capacitor may, therefore, be replaced by an equivalent resistance whose value is dependent on both the capacitor size and the switching frequency. This explains why lower capacitor values may be used with higher switching frequencies. It should be remembered that as the switching freque ...
NCV887300LEDGEVB NCV887300 Automotive Grade High‐frequency Dimmable LED Boost
NCV887300LEDGEVB NCV887300 Automotive Grade High‐frequency Dimmable LED Boost

... limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for ea ...
experimental procedure
experimental procedure

Complete Paper
Complete Paper

Document
Document

The Seven Types of Power Problems
The Seven Types of Power Problems

... potential for ESD. For example, almost any proper data center environment involves conditioning of the air in the room. Conditioning the air does not just cool the air to help remove heat from data center equipment, but also adjusts the amount of moisture in the air. Keeping the humidity in the air ...
I56-3889-002R - Silent Knight
I56-3889-002R - Silent Knight

Ultra Low Power PLL Implementations
Ultra Low Power PLL Implementations

Power Electronics Converters for Variable Speed Pump
Power Electronics Converters for Variable Speed Pump

... stator of the doubly fed machine is connected through a block transformer to the power network. The rotor is driven by an adjustable blade turbine and fed from a power electronics converter. Nowadays, the research of power electronics converters used in variable-speed pump storage is a multilevel in ...
AN020: Paralleling High Speed GaN Transistors
AN020: Paralleling High Speed GaN Transistors

... As switching speeds steadily increase and parasitic inductances continue to decrease, improved techniques must be developed to improve parallel performance. To effectively parallel high speed GaN transistors the parasitic imbalance contributed by the PCB layout must be minimized. We will look at two ...
H4148
H4148

... Sliding-Mode Controllers are non-linear controllers which are used for controlling the variable structure systems (VSSs) [1]-[3]. The power converters are variable-structured systems due to their high switching action. Hence SM controllers are used for control of power converters [4]. The SM control ...
motors
motors

... the direction of rotation of magnetic field by interchanging any two of the line connections. The speed of revolving of the magnetic field produced by primary currents is called the synchronous speed of the motor, and is given by N= 120f/p where f is the supply frequency and p is the number of poles ...
Document
Document

... Recognizing that G  RIN << R1 for low gains, it can be seen to the first order that bandwidth for this amplifier is independent of gain (G). Considering that additional poles contribute excess phase at high frequencies, there is a minimum feedback resistance below which peaking or oscillation may r ...
Tuning your oneTesla
Tuning your oneTesla

TQP4M9071 数据资料DataSheet下载
TQP4M9071 数据资料DataSheet下载

... The TQP4M9071 is a high linearity, low insertion loss, wideband, 6-bit, 31.5 dB digital step attenuator. The digital step attenuator uses a single 3.3V or 5V supply and has a parallel control interface for changing attenuation states. This product maintains high attenuation accuracy over frequency a ...
Broadband Communications over Power Lines (BPL)
Broadband Communications over Power Lines (BPL)

... • HomePlug uses a spectral mask that provides 30 dB of filtering in the amateur HF bands. • At current RF brightness levels of –80 dBm/Hz, HomePlug signals can cause interference to antennas (especially indoor) that run within 2 – 3 m of household power lines. • HomePlug signals can also leak into ...
DC microgrids (droop control)
DC microgrids (droop control)

... controlling the prime mover’s torque. By “commanding” a decrease in frequency, the output power will increase. • A similar approach is followed with reactive power control, by controlling field excitation in an attempt to change output voltage. Higher commanded frequencies ...
Dynamic Study Model for the Interconnected Power - ENTSO-e
Dynamic Study Model for the Interconnected Power - ENTSO-e

... underwent some adaptation steps, before it was distributed: • adding of step-up transformers for generators directly connected to the transmission level, • reduction of parallel lines, • reduction of coupled busbars, • aggregation of multiple loads at busbars and • aggregation of multiple generation ...
EE 1332833
EE 1332833

Power System Fundamentals
Power System Fundamentals

Dynamic Study Model for the Interconnected Power
Dynamic Study Model for the Interconnected Power

... underwent some adaptation steps, before it was distributed: • adding of step-up transformers for generators directly connected to the transmission level, • reduction of parallel lines, • reduction of coupled busbars, • aggregation of multiple loads at busbars and • aggregation of multiple generation ...
< 1 ... 111 112 113 114 115 116 117 118 119 ... 238 >

Utility frequency



The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report