
View - The IJST
... percentage contribution of the delay to the overall period increases. This delay will disturb current alignment with the back EMF and will cause severe problems for commutation at high speed. Consequently, this method tends to have a narrow speed range. In the past, there have been several integrate ...
... percentage contribution of the delay to the overall period increases. This delay will disturb current alignment with the back EMF and will cause severe problems for commutation at high speed. Consequently, this method tends to have a narrow speed range. In the past, there have been several integrate ...
Catalogue 2014 1
... The CRI (Colour Rendering Index), sometimes called colour rendition index, is a quantitative measure of the ability of a light source to reproduce the colours of various objects faithfully in comparison with an ideal or natural light source. Numerically, the highest possible CRI is 100, for a blackb ...
... The CRI (Colour Rendering Index), sometimes called colour rendition index, is a quantitative measure of the ability of a light source to reproduce the colours of various objects faithfully in comparison with an ideal or natural light source. Numerically, the highest possible CRI is 100, for a blackb ...
Performance of Line-start Permanent Magnet Synchronous Motor
... In recent years, Line-start Permanent Magnet Synchronous Motor (LSPMSM) has attracted the attention of a large number of scholars and manufacturers, for its advantages of high efficiency, high power factor and wide economic operation range [1-3]. The LSPMSM, which inherits the structure characterist ...
... In recent years, Line-start Permanent Magnet Synchronous Motor (LSPMSM) has attracted the attention of a large number of scholars and manufacturers, for its advantages of high efficiency, high power factor and wide economic operation range [1-3]. The LSPMSM, which inherits the structure characterist ...
Publication - University of Michigan – Shanghai Jiao Tong University
... I. I NTRODUCTION In recent years wireless power transfer (WPT) using inductive resonance coupling has become increasingly popular. The technology is now being applied to charge cellphones, wearable devices, and even electric vehicles, etc [1], [2]. For large-power applications, WPT working at kilohe ...
... I. I NTRODUCTION In recent years wireless power transfer (WPT) using inductive resonance coupling has become increasingly popular. The technology is now being applied to charge cellphones, wearable devices, and even electric vehicles, etc [1], [2]. For large-power applications, WPT working at kilohe ...
Fundamentals of Energy Efficient Lighting
... lighting systems that were designed more than five years ago probably did not take into consideration the probability of each desk having a computer terminal. Therefore, a perfectly adequate lighting system from five years ago may now be deemed unacceptable, because of glare on the computer screens. ...
... lighting systems that were designed more than five years ago probably did not take into consideration the probability of each desk having a computer terminal. Therefore, a perfectly adequate lighting system from five years ago may now be deemed unacceptable, because of glare on the computer screens. ...
... half cycle (θ ∈ [α, γ)). All the operation modes and their characteristics are summarized in Table II. It can be seen that the main power interval P occurs in every half period except for the O mode under zero-load condition. So O mode is regarded as the cutoff mode since no power is delivered to th ...
- aes journals
... ABSTRACT: Power quality is one of major concerns in the present era. It has become important, especially, with the introduction of sophisticated devices, whose performance is very sensitive to the quality of power supply. Power quality problem is an occurrence manifested as a nonstandard voltage, cu ...
... ABSTRACT: Power quality is one of major concerns in the present era. It has become important, especially, with the introduction of sophisticated devices, whose performance is very sensitive to the quality of power supply. Power quality problem is an occurrence manifested as a nonstandard voltage, cu ...
cause the controllers operating the turbine converters are not
... As the estimated probability distribution functions describes the harmonic emission at the high voltage side of the wind turbine transformers, the idea is to model the wind turbine including the transformer as a simple ideal current source placed directly at the high voltage side of the transformer. ...
... As the estimated probability distribution functions describes the harmonic emission at the high voltage side of the wind turbine transformers, the idea is to model the wind turbine including the transformer as a simple ideal current source placed directly at the high voltage side of the transformer. ...
Compumotor P Series Drive Operations Manual
... The P-Drive should be mounted in an area that will allow air to circulate over its heat sink. Sufficient cooling may be derived from convection cooling at operation up to five amps of continuous motor current output, provided the P-Drive is mounted in free air (preferably with its heat sink aligned ...
... The P-Drive should be mounted in an area that will allow air to circulate over its heat sink. Sufficient cooling may be derived from convection cooling at operation up to five amps of continuous motor current output, provided the P-Drive is mounted in free air (preferably with its heat sink aligned ...
NCP1207A, NCP1207B PWM Current--Mode Controller for Free Running Quasi--Resonant Operation
... turn--on losses and no secondary diode recovery losses. The converter also stays a first--order system and accordingly eases the feedback loop design. Quasi--resonant operation: by delaying the turn--on event, it is possible to re--start the MOSFET in the minimum of the drain--source wave, ensuring ...
... turn--on losses and no secondary diode recovery losses. The converter also stays a first--order system and accordingly eases the feedback loop design. Quasi--resonant operation: by delaying the turn--on event, it is possible to re--start the MOSFET in the minimum of the drain--source wave, ensuring ...
Polyphase AC Induction Motor TROUBLESHOOTING GUIDE
... Trouble 9: Motor runs but appreciably below nameplate speed Page 9 Trouble 10: Excessive electrical noise or clatter under load Page 9 Section 4: 4: EXCESSIVE EXCESSIVE NOISE NOISE OR OR VIBRATION, VIBRATION, Section PHYSICAL DAMAGE, DAMAGE, OR OR BAD BAD BEARINGS BEARINGS PHYSICAL ...
... Trouble 9: Motor runs but appreciably below nameplate speed Page 9 Trouble 10: Excessive electrical noise or clatter under load Page 9 Section 4: 4: EXCESSIVE EXCESSIVE NOISE NOISE OR OR VIBRATION, VIBRATION, Section PHYSICAL DAMAGE, DAMAGE, OR OR BAD BAD BEARINGS BEARINGS PHYSICAL ...
Basic Production GTAW
... 2. What does it mean if a welding machine’s duty cycle is 60%? The machine can run 6 out of 10 minutes 3. Illustrate the welding circuit and label its parts. Power source, Work piece, electrode lead, work (ground) lead 4. What creates the heat in a welding circuit? Resistance to current - arc gap 5. ...
... 2. What does it mean if a welding machine’s duty cycle is 60%? The machine can run 6 out of 10 minutes 3. Illustrate the welding circuit and label its parts. Power source, Work piece, electrode lead, work (ground) lead 4. What creates the heat in a welding circuit? Resistance to current - arc gap 5. ...
NCP1207A, NCP1207B PWM Current
... ideal candidate where low part-count is the key parameter, particularly in low-cost AC/DC adapters, consumer electronics, auxiliary supplies, etc. Thanks to its high-performance High-Voltage technology, the NCP1207A/B incorporates all the necessary components / features needed to build a rugged and ...
... ideal candidate where low part-count is the key parameter, particularly in low-cost AC/DC adapters, consumer electronics, auxiliary supplies, etc. Thanks to its high-performance High-Voltage technology, the NCP1207A/B incorporates all the necessary components / features needed to build a rugged and ...
MAX13253 1A, Spread-Spectrum, Push-Pull, Transformer Driver for Isolated Power Supplies General Description
... Power Ground. The transformer primary current flows through PGND. Ensure a low-resistance connection to ground. ...
... Power Ground. The transformer primary current flows through PGND. Ensure a low-resistance connection to ground. ...
dl 2617 six pulse control unit
... This module must operate as matching element between signal voltage levels and standard voltages used in automatic control systems. This amplifier must have the following technical features: •Power supply: -15 V/0 V/+15 V •Input signal range Ui: -50 V . . . + 50 V •Coarse and fine gain setting: 0÷1/ ...
... This module must operate as matching element between signal voltage levels and standard voltages used in automatic control systems. This amplifier must have the following technical features: •Power supply: -15 V/0 V/+15 V •Input signal range Ui: -50 V . . . + 50 V •Coarse and fine gain setting: 0÷1/ ...
LAPPEENRANTA UNIVERSITY OF TECHNOLOGY DEPARTMENT
... distributed generation is increasing worldwide. Last year's (2006) turnover in the market of wind energy systems was at the level of €2.5 billion a year, photovoltaic system’s market turnover was about €1.2 billion a year with total power of all installed photovoltaic panels 1000MW. Small hydro powe ...
... distributed generation is increasing worldwide. Last year's (2006) turnover in the market of wind energy systems was at the level of €2.5 billion a year, photovoltaic system’s market turnover was about €1.2 billion a year with total power of all installed photovoltaic panels 1000MW. Small hydro powe ...
M106N SERIES
... with an evenly spaced pattern of conical prisms on the bottom panel and sharp linear prisms on the interior side panels. Provides optimum brightness control and light transmission. Diffusers hinge down from either side for easy maintenance. All 8Ft. modules use two individual 4FT. diffusers. ...
... with an evenly spaced pattern of conical prisms on the bottom panel and sharp linear prisms on the interior side panels. Provides optimum brightness control and light transmission. Diffusers hinge down from either side for easy maintenance. All 8Ft. modules use two individual 4FT. diffusers. ...
Full Text - ARPN Journals
... Distortion) of 65% and power factor as low as 0.8. So the power factor is corrected using the PFC converters. Both continuous and discontinuous modes of the converters are discussed and the discontinuous mode of conduction is best suited for the low power applications. Since the discontinuous conduc ...
... Distortion) of 65% and power factor as low as 0.8. So the power factor is corrected using the PFC converters. Both continuous and discontinuous modes of the converters are discussed and the discontinuous mode of conduction is best suited for the low power applications. Since the discontinuous conduc ...
SI unit for EtherNet/IP EX250-SEN1
... ♦Follow the instructions given below when handling reduced-wiring system: Or it will have a risk of being damaged and operating failure. ♦The instructions on selection (installation, wiring, environment of use, adjustment, operation and maintenance) described below must also be followed. ∗Product sp ...
... ♦Follow the instructions given below when handling reduced-wiring system: Or it will have a risk of being damaged and operating failure. ♦The instructions on selection (installation, wiring, environment of use, adjustment, operation and maintenance) described below must also be followed. ∗Product sp ...
Introduction
... the hybrid motor has some of the desirable features of each. They have high detent torque and excellent holding and dynamic torque, and they can operate at high stepping speeds. Normally, they exhibit step angle of 0.9 to 5 degrees. ...
... the hybrid motor has some of the desirable features of each. They have high detent torque and excellent holding and dynamic torque, and they can operate at high stepping speeds. Normally, they exhibit step angle of 0.9 to 5 degrees. ...
Electrification

Electrification is the process of powering by electricity and is usually associated with changing over from another power source. The broad meaning of the term, such as in the history of technology and economic history, usually applies to a region or national economy. Broadly speaking, electrification was the build out of the electrical generating and distribution systems which occurred in Britain, the United States, and other countries from the mid-1880s until around 1950 and is in progress in rural areas in some developing countries. This included the change over from line shaft and belt drive using steam engines and water power to electric motors.The electrification of particular sectors of the economy is called by terms such as factory electrification, household electrification, rural electrification or railway electrification. It may also apply to changing industrial processes such as smelting, melting, separating or refining from coal or coke heating or chemical processes to some type of electric process such as electric arc furnace, electric induction or resistance heating or electrolysis or electrolytic separating.Electrification was called ""the greatest engineering achievement of the 20th Century"" by the National Academy of Engineering.