Sample Problem Topic: Thévenin and Norton
... Statement of Problem: Given the circuit shown in the figure below ...
... Statement of Problem: Given the circuit shown in the figure below ...
05VoltageCurrentPower
... 14. When all the generators are running at Hoover Dam, it produces 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 po ...
... 14. When all the generators are running at Hoover Dam, it produces 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 po ...
Utilization of power factor correction capacitors in circuits
... systems, capacitors are often used for power factor correction. The purpose of these capacitors is to counteract inductive loading from devices such as electric motors and transmission lines. While individual motors may have capacitors for power factor correction, larger electrical distribution syst ...
... systems, capacitors are often used for power factor correction. The purpose of these capacitors is to counteract inductive loading from devices such as electric motors and transmission lines. While individual motors may have capacitors for power factor correction, larger electrical distribution syst ...
EE 340 – Fall 2007 Homework-1 (80 points) Solve following
... A remarkable method to balance a circuit: A resistive load with R = 0.242 Ω is connected between phases a-b of a 440V, 3-phase, positive sequence supply. Let Vab = 440 ∟0o V, Vbc = 440 ∟-120o V, Vca = 440 ∟+120o V Calculate the load currents and line currents. Repeat these calculations when a capaci ...
... A remarkable method to balance a circuit: A resistive load with R = 0.242 Ω is connected between phases a-b of a 440V, 3-phase, positive sequence supply. Let Vab = 440 ∟0o V, Vbc = 440 ∟-120o V, Vca = 440 ∟+120o V Calculate the load currents and line currents. Repeat these calculations when a capaci ...
Rated at 6-kW output power, it is based on the new three
... The DiRAC power unit is based on the recent AC-DC three-level ZVS converter topology and it is composed of a PFC stage combined with a buck converter into a single stage for a rated 6kW output power (PS120050 version, 120A@50V). The resonant nature of this power supply guarantees high efficiency, a ...
... The DiRAC power unit is based on the recent AC-DC three-level ZVS converter topology and it is composed of a PFC stage combined with a buck converter into a single stage for a rated 6kW output power (PS120050 version, 120A@50V). The resonant nature of this power supply guarantees high efficiency, a ...
Switched-mode power supply charger
... • The project is about designing an approximately 325VDC charger, that can output approximately 10A. Power is taken from a 230 VAC 16 A plug. The efficiency should be over 90% and the size of the charger should be minimized by using switching frequency as high as possible. The charger is designed fo ...
... • The project is about designing an approximately 325VDC charger, that can output approximately 10A. Power is taken from a 230 VAC 16 A plug. The efficiency should be over 90% and the size of the charger should be minimized by using switching frequency as high as possible. The charger is designed fo ...
7 With the protective cover closed, it is not possible to set the
... If the phase-rotation protection function is activated, the 400 Hz frequency may not be selected. If the 400 Hz frequency is selected, the phase-rotation protection ...
... If the phase-rotation protection function is activated, the 400 Hz frequency may not be selected. If the 400 Hz frequency is selected, the phase-rotation protection ...
Unitron, LP
... achieve military-established goals of decreasing pollution from exhaust emissions and hazardous waste, increasing operational efficiency, reducing costs and increasing worker safety, Unitron has developed a product line to support the SFLEDS program. The 270VDC UDC Series SFLEDS includes 270VDC conv ...
... achieve military-established goals of decreasing pollution from exhaust emissions and hazardous waste, increasing operational efficiency, reducing costs and increasing worker safety, Unitron has developed a product line to support the SFLEDS program. The 270VDC UDC Series SFLEDS includes 270VDC conv ...
ee221_4a
... represent the real (P) and reactive (Q) components of the power: Sˆ Vrms I rms v i Vrms I rms cos v i j Vrms I rms sin v i ...
... represent the real (P) and reactive (Q) components of the power: Sˆ Vrms I rms v i Vrms I rms cos v i j Vrms I rms sin v i ...
Multiple-output Switched Mode Power Supplies (SMPSs)
... onverters effect a perceivable PQ improvement in these SMPSs . ...
... onverters effect a perceivable PQ improvement in these SMPSs . ...
EAC-I Programmable AC Power Source
... ET System electronic EAC-I Series of Programmable AC Power Source is compact in size and light in weight due to the use of the state of the art switch mode high frequency PWM technology. These AC Power Sources come with a built in PFC with universal input to provide a typical input power factor of 0 ...
... ET System electronic EAC-I Series of Programmable AC Power Source is compact in size and light in weight due to the use of the state of the art switch mode high frequency PWM technology. These AC Power Sources come with a built in PFC with universal input to provide a typical input power factor of 0 ...
RIII Area Grid Operations - The United States Nuclear Infrastructure
... Customer loads consume reactive power, as do heavily loaded transmission lines Reactive power cannot travel long distances because it meets considerable resistance over the transmission lines. As transmission lines become more heavily loaded, they consume more of the reactive power needed to maintai ...
... Customer loads consume reactive power, as do heavily loaded transmission lines Reactive power cannot travel long distances because it meets considerable resistance over the transmission lines. As transmission lines become more heavily loaded, they consume more of the reactive power needed to maintai ...
Maximizing the Power Transferred to a Load Resistance in an
... In the circuit shown, we observe a voltage source V and a fixed source resistance, RS, which is attached to a load with resistance, RL. Power is transferred from the voltage source to the load resistance. The current, I, that flows in the circuit can be found by applying Ohm’s Law. The current, I, i ...
... In the circuit shown, we observe a voltage source V and a fixed source resistance, RS, which is attached to a load with resistance, RL. Power is transferred from the voltage source to the load resistance. The current, I, that flows in the circuit can be found by applying Ohm’s Law. The current, I, i ...
Power factor
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.