• 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
Table showing DTMF Low and High frequency tones and decoded
Table showing DTMF Low and High frequency tones and decoded

... triggering a relay). For example, a high water alarm, low temperature alarm, opening of back window, garage door, etc. When the system is activated it will call a number of programmed numbers to let the user know the alarm has been activated. This would be great to get alerts of alarm conditions fro ...
Pedagogical study of electric go-karts: Technological
Pedagogical study of electric go-karts: Technological

BJ23360364
BJ23360364

... parallel active power filter, since this type of filter must have source current characteristics. The inductors specification affects the dc-link voltage and the THD of the grid current. In fact, an increase in the value of this inductor will increase the dc-link voltage and will decrease the total ...
TD62604PG,TD62604FG - Toshiba America Electronic Components
TD62604PG,TD62604FG - Toshiba America Electronic Components

... exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs from the wiring or load, causing a large current to continuously flow and the breakdown can lead smoke or ignition. To minimize the effects of the flow of a large current in case of break ...
an1686 application note
an1686 application note

... in case of anomalous power demand from the load (exceeding the peak power, e.g. due to a short circuit), converter's shutdown must occur within 10 ÷100 ms. A power peak lasting 0.5 s is too long to be handled with just a reinforced output capacitor bank: as a matter of fact, after few ms the convert ...
Potential Dividers
Potential Dividers

model vd-500a capacitive voltage divider
model vd-500a capacitive voltage divider

... Typically, the divider is placed in high-voltage insulating oil, such as Shell Diala AX, along with other components of the high-voltage circuit being measured. The case has drain holes to allow oil to enter or drain out as the unit is inserted or removed from the oil bath. The standard calibration ...
195 Series Models: 1952 1953 1954
195 Series Models: 1952 1953 1954

... Low Cost UL Recognized Interchangeable with other manufactures meters Surface or Window mount Wide selection of ranges Customized scales available Mirrored scales available Frequency models available ...
course outline - Portal UniMAP
course outline - Portal UniMAP

A new surface-inset, permanent-magnet, brushless DC motor drive
A new surface-inset, permanent-magnet, brushless DC motor drive

... have distinct advantages of high efficiency, high-power density, and maintenance-free operation, they have been identified as the most promising drive system for modern EVs [1]. However, the main problem with this drive system is its limited speed range for constant power operation. It is because th ...
electrical drive
electrical drive

... It lines 3 θ induction motors which work on a 3.3kv, 16 2/3 Hz supply. Substation receive power at a very high voltage from 3 φ transmission lines at the usual industrial frequency of 50 Hz. This high voltage is stepped down to 3.3Kv by transformer whereas frequency is reduced from 50 Hz to 16 2/3 ...
ITS_1_Unit 1 Summative Test
ITS_1_Unit 1 Summative Test

101a-NK_Technologies_Power_Transducers
101a-NK_Technologies_Power_Transducers

... APS A – B – C – A ...
05VoltageCurrentPower
05VoltageCurrentPower

... 2,000,000,000 Watts. This power is then sent elsewhere by power lines. The diagram at right is a simplified version of the situation, where the battery represents the generators and the light bulb represents the city that uses the power. If the “battery” is driving the circuit at 120 V (household vo ...
Control Options
Control Options



... AC and DC, Voltage and Current for measuring of currents e.g. at plants for own generation of electricity • Measuring input voltage AC/DC 600 V (pre-set 60/150/300/600 V) • Measuring input current AC/DC 5A (pre-set 1/5 A) • Zero and full scale for other ranges can be scaled by the user easil ...
Generic Hardware Info
Generic Hardware Info

... “Power Supply” Can also specify a maximum allowed current This does not change the voltage. The current can still be less than this limit. ...
commercial / industrial customer information sheet
commercial / industrial customer information sheet

How Does the Voltage Regulator Work
How Does the Voltage Regulator Work

Asymmetric SPWM used in inverter grid connected
Asymmetric SPWM used in inverter grid connected

... The MPP tracking technique is usually associated with a DC/DC converter [2-4]. When the utility power sources should provide the peak power to the load, the energy provided by PV arrays can alleviate the burden of utility power sources. Power supply reliability and power quality have become importan ...
Rotating DC Motors Part I
Rotating DC Motors Part I

... Figure 4. Note, while the brushes contact both commutator segments (positions 1 and 3), the current is diverted from the loop and will flow directly from the top brush to the lower brush (this short-circuit condition will go away as we move to a more practical machine). In position 2, the current fl ...
SENTRON PAC3200
SENTRON PAC3200

... Reliable and precise monitoring of electrical power systems The SENTRON PAC3200 is a powerful compact power monitoring device that is suitable for use in industrial, government and commercial applications where basic metering and energy monitoring is required. The meter may be used as a stand alone ...
training power point
training power point

... What is Voltage Optimisation? Voltage optimisation is a generic term given to the managed reduction of voltages received from a supplier down to a value that more closely meets the designed rating for all your electrical appliances. Electrical appliances manufactured for the UK and Europe are rated ...
TAN150
TAN150

Power Delivery Basics Presentation, December 3, 2009
Power Delivery Basics Presentation, December 3, 2009

...  A 100 watt light bulb operated for 10 hours uses 1,000 watthours or 1 kWh. That would cost about 8 cents.  Average Utah residential customer uses 800 kWh per month ...
< 1 ... 1106 1107 1108 1109 1110 1111 1112 1113 1114 ... 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