IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... In this paper the selection of the best possible location for installation of an UPFC is carried out with an objective of enhancement the voltage stability of the IEEE-14 bus system using PSAT (power system analysis Toolbox) software [7]. ...
... In this paper the selection of the best possible location for installation of an UPFC is carried out with an objective of enhancement the voltage stability of the IEEE-14 bus system using PSAT (power system analysis Toolbox) software [7]. ...
Concepts
... 4.0 H inductor, or both (in series). Which one will cause the greatest current to flow through the circuit? A) The capacitor B) The inductor C) both D) Insufficient information ...
... 4.0 H inductor, or both (in series). Which one will cause the greatest current to flow through the circuit? A) The capacitor B) The inductor C) both D) Insufficient information ...
Special Edition
... Block the interfering signal with an active filter at the point of connection of the electric hob or filter out the interference directly on the machine. What is the origin of these interfering frequencies? A bridge rectifier at the input to the CNC machine produces a DC voltage from the t ...
... Block the interfering signal with an active filter at the point of connection of the electric hob or filter out the interference directly on the machine. What is the origin of these interfering frequencies? A bridge rectifier at the input to the CNC machine produces a DC voltage from the t ...
MAX8640Y/MAX8640Z Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters General Description
... switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing sma ...
... switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing sma ...
... pre-charge circuit, current sense circuit and OPAMP buffer. Any switching power supply capable of operating from the system’s maximum required input voltage that can generate an 8-14 V output voltage with at least 200mA can be used for this function. This output voltage range is set by the VCC requi ...
Time Varying Voltages
... We have talked about the electromotive force (e.m.f.) created by chemical means in batteries. Batteries produce an e.m.f. that does not change as time passes – at least it doesn’t change up until such time as the battery wears out. There are other sources of e.m.f. that do change their amplitude as ...
... We have talked about the electromotive force (e.m.f.) created by chemical means in batteries. Batteries produce an e.m.f. that does not change as time passes – at least it doesn’t change up until such time as the battery wears out. There are other sources of e.m.f. that do change their amplitude as ...
AN-1895 LM22671 Evaluation Board (Rev. D)
... Step-Down Voltage Regulator with Features (SNVS589) for information regarding component selection. The WEBENCH® designer online circuit simulation tool is also available on the TI website. The output voltage is adjustable with resistors R1 and R2 shown in Figure 1. Any changes to these evaluation bo ...
... Step-Down Voltage Regulator with Features (SNVS589) for information regarding component selection. The WEBENCH® designer online circuit simulation tool is also available on the TI website. The output voltage is adjustable with resistors R1 and R2 shown in Figure 1. Any changes to these evaluation bo ...
DC Shunt Motors - PSSurvival.com
... When the shunt motor reaches full rpm, its speed will remain fairly constant. The reason the speed remains constant is due to the load characteristics of the armature and shunt coil. You should remember that the speed of a series motor could not be controlled since it was totally dependent on the si ...
... When the shunt motor reaches full rpm, its speed will remain fairly constant. The reason the speed remains constant is due to the load characteristics of the armature and shunt coil. You should remember that the speed of a series motor could not be controlled since it was totally dependent on the si ...
AMS116 数据手册DataSheet 下载
... Take a vertical line from the maximum operating temperature (75°C) to the derating curve. 6. Read the value of PD at the point where the vertical line intersects the derating curve. This is the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD/ (VIN(MAX) - VO) External Ca ...
... Take a vertical line from the maximum operating temperature (75°C) to the derating curve. 6. Read the value of PD at the point where the vertical line intersects the derating curve. This is the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD/ (VIN(MAX) - VO) External Ca ...
EFFICIENCY IN SMALL PERMANENT MAGNET DC GENERATORS
... influences the overall efficiency. Generally, the maximum efficiency occurs when the source (generator) impedance is matched to the external load impedance. In dc generators, impedance effects occur when the inductance of the generator windings interacts in any way with the load. A noninductive load ...
... influences the overall efficiency. Generally, the maximum efficiency occurs when the source (generator) impedance is matched to the external load impedance. In dc generators, impedance effects occur when the inductance of the generator windings interacts in any way with the load. A noninductive load ...
Waveform Conversion, Part I - Sine to Square
... line receivers have built-in voltage dividers allowing the inputs to handle voltages far beyond the power supply rails and some have built-in voltage references for biasing the input stage. They are also available in combination with line drivers and many have tri-state control inputs. The possible ...
... line receivers have built-in voltage dividers allowing the inputs to handle voltages far beyond the power supply rails and some have built-in voltage references for biasing the input stage. They are also available in combination with line drivers and many have tri-state control inputs. The possible ...
RF Energy Harvesting, Maximum Power Point Tracking, Energy
... further adjustments in that direction are made until power no longer increases. This approach, also referred to as hill-climbing method, depends on the rise of the curve of power against voltage below the maximu m power point and the fall above that point. This MPPT-based power model is remarkable b ...
... further adjustments in that direction are made until power no longer increases. This approach, also referred to as hill-climbing method, depends on the rise of the curve of power against voltage below the maximu m power point and the fall above that point. This MPPT-based power model is remarkable b ...
Synchronous Machines A. Preparation Demonstration C. Report B
... CAUTION: Due to high output voltage, the synchronous generator should not be connected directly to a frequency counter or an oscilloscope. To observe the generator waveform and measure rpm, connect a 30:1 stepdown isolation transformer to one phase of the synchronous machine plug and then examine th ...
... CAUTION: Due to high output voltage, the synchronous generator should not be connected directly to a frequency counter or an oscilloscope. To observe the generator waveform and measure rpm, connect a 30:1 stepdown isolation transformer to one phase of the synchronous machine plug and then examine th ...
IEC Voltage Standard and Recommendation
... IEC Voltage Standard and Recommendation Definition of High Voltage : The numerical definition of high voltage depends on the context of the discussion. Two factors considered in the classification of a "high voltage" are the possibility of causing a spark in air, and the danger of electric shock by ...
... IEC Voltage Standard and Recommendation Definition of High Voltage : The numerical definition of high voltage depends on the context of the discussion. Two factors considered in the classification of a "high voltage" are the possibility of causing a spark in air, and the danger of electric shock by ...
Low Power Design in VLSI
... – Different logic styles (logic, pass transistor, dynamic) – Careful transistor sizing – Tighter layout – Segmented structures • Reduce supply voltage V – Quadratic savings in energy per transition – BIG effect – But circuit delay is reduced • Reduce frequency – Doesn’t save energy just reduces rate ...
... – Different logic styles (logic, pass transistor, dynamic) – Careful transistor sizing – Tighter layout – Segmented structures • Reduce supply voltage V – Quadratic savings in energy per transition – BIG effect – But circuit delay is reduced • Reduce frequency – Doesn’t save energy just reduces rate ...
Annex - B Technical Compliant Datasheet
... Name of manufacturer: ABB , Schneider Siemens or equivalent Rated Voltage :11-0.416 kV Rated KVA :250KVA Rated power factor :0.8 No. of Phase: 3Ph Highest system voltage:12000 volts System:3- phase,3-wire with neutral isolated but provision is made for earthling through an earthling resistance of 21 ...
... Name of manufacturer: ABB , Schneider Siemens or equivalent Rated Voltage :11-0.416 kV Rated KVA :250KVA Rated power factor :0.8 No. of Phase: 3Ph Highest system voltage:12000 volts System:3- phase,3-wire with neutral isolated but provision is made for earthling through an earthling resistance of 21 ...
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.