University of North Carolina-Charlotte Department of Electrical and Computer Engineering
... machine is delivering the maximum apparent power at rated power factor. Make sure to use Xd in Ohms, not in pu. Remember that the machine has a line-to-line voltage of 10kV RMS. You’ll have to compute the line-to-neutral voltage in order to compute the power angle δ and the excitation voltage Eaf . ...
... machine is delivering the maximum apparent power at rated power factor. Make sure to use Xd in Ohms, not in pu. Remember that the machine has a line-to-line voltage of 10kV RMS. You’ll have to compute the line-to-neutral voltage in order to compute the power angle δ and the excitation voltage Eaf . ...
E7 Drive - Yaskawa
... A Sleep function provides significant energy savings by minimizing operating hours. Under-torque detection, alerts the operator to conditions such as loss of load or broken belts. Energy savings control is an automatic output voltage adjustment in response to actual motor load. Real-time energy savi ...
... A Sleep function provides significant energy savings by minimizing operating hours. Under-torque detection, alerts the operator to conditions such as loss of load or broken belts. Energy savings control is an automatic output voltage adjustment in response to actual motor load. Real-time energy savi ...
monitoring of energy quality for residential consumers
... receivers; measurement errors of their wattmeters (up to 3%) and induction meters (up to 14%) are due to decrease power factor deforming under k = P / S < cos ϕ ; c) request beyond established facilities for reactive power compensation capacitors; d) Additional loss of power and active power in elec ...
... receivers; measurement errors of their wattmeters (up to 3%) and induction meters (up to 14%) are due to decrease power factor deforming under k = P / S < cos ϕ ; c) request beyond established facilities for reactive power compensation capacitors; d) Additional loss of power and active power in elec ...
Electronicsound
... This is an experimental law, valid for both alternating current (ac) and direct current (dc) circuits. When you pass an electric current (I) through a resistance (R) there will be a potential difference or voltage (V) created across the resistance. Ohm’s law gives a relationship between the voltage ...
... This is an experimental law, valid for both alternating current (ac) and direct current (dc) circuits. When you pass an electric current (I) through a resistance (R) there will be a potential difference or voltage (V) created across the resistance. Ohm’s law gives a relationship between the voltage ...
1 Measuring Charging Currents: RC Circuits, Electrochemical
... of the battery, the capacitor acts like a break in the wire or “open circuit,” and the current is essentially zero. Now we “shut off” the battery (replace it with a wire). The capacitor will th ...
... of the battery, the capacitor acts like a break in the wire or “open circuit,” and the current is essentially zero. Now we “shut off” the battery (replace it with a wire). The capacitor will th ...
Slide 1
... “Any power problems manifested in voltage, current, or frequency deviations which results in failure or misoperation of customer equipment” 1. Introduction ...
... “Any power problems manifested in voltage, current, or frequency deviations which results in failure or misoperation of customer equipment” 1. Introduction ...
TWO TERMINAL DEVICES - University of Toronto Physics
... relationship give the characteristics. For other devices, like diodes, the relationship is a bit more complicated, and often more than one number, or even a graph relating i to v, is necessary to provide the description. The form of the relationship between i and v for diodes is adequately covered i ...
... relationship give the characteristics. For other devices, like diodes, the relationship is a bit more complicated, and often more than one number, or even a graph relating i to v, is necessary to provide the description. The form of the relationship between i and v for diodes is adequately covered i ...
soln_1-99
... Many of you developed a circuit in which the current from the AD590 was sensed by a series resistor, and the voltage across the resistor was used directly as the input to a comparator. While these circuits would work in principle, the change in voltage is so small that it makes the setting of the hy ...
... Many of you developed a circuit in which the current from the AD590 was sensed by a series resistor, and the voltage across the resistor was used directly as the input to a comparator. While these circuits would work in principle, the change in voltage is so small that it makes the setting of the hy ...
LM148/LM248/LM348 Quad 741 Op AmpsLM149 Wide Band
... and current range. However, if very large capacitive loads must be driven by a non-inverting unity gain amplifier, a resistor should be placed between the output (and feedback connection) and the capacitance to reduce the phase shift resulting from the capacitive loading. The output current of each ...
... and current range. However, if very large capacitive loads must be driven by a non-inverting unity gain amplifier, a resistor should be placed between the output (and feedback connection) and the capacitance to reduce the phase shift resulting from the capacitive loading. The output current of each ...
AN021 : Voltage Level Conversion
... voltages lower than the old industrystandard 5V. Running at a lower voltage enables the ICs to be less expensive and have lower power consumption than they would have had if they used a 5 V supply. Also, lower operating voltages are good for battery-operated systems. However, this can cause problems ...
... voltages lower than the old industrystandard 5V. Running at a lower voltage enables the ICs to be less expensive and have lower power consumption than they would have had if they used a 5 V supply. Also, lower operating voltages are good for battery-operated systems. However, this can cause problems ...
International Electrical Engineering Journal (IEEJ) Vol. 5 (2014) No.10, pp. 1553-1558
... represents the main generation unit in the microgrid and proton exchange membrane fuel cell is supplement the variable power generated by the photovoltaic array. a lithium ion battery is included in the microgrid for reduce the burden of the power generated by the microgrid during the peak period. T ...
... represents the main generation unit in the microgrid and proton exchange membrane fuel cell is supplement the variable power generated by the photovoltaic array. a lithium ion battery is included in the microgrid for reduce the burden of the power generated by the microgrid during the peak period. T ...
MAX8515 - Maxim Integrated
... Low-cost, low-dropout linear regulators can be designed with the MAX8515A/MAX8515 and an external NPN transistor for cost-conscious applications that do not require overcurrent, short-circuit, or overtemperature protection. The MAX8515/MAX8515A are available in space-saving 5-pin SC70 and SOT23 pack ...
... Low-cost, low-dropout linear regulators can be designed with the MAX8515A/MAX8515 and an external NPN transistor for cost-conscious applications that do not require overcurrent, short-circuit, or overtemperature protection. The MAX8515/MAX8515A are available in space-saving 5-pin SC70 and SOT23 pack ...
Swedish train detector system
... connected to the primary port of the relay. When the Irail voltage is 6 V, the secondary contacts are closed. When the I-rail voltage is 0 V, the secondary ports are open. • In the detector circuit there is an adjustable resistor, and a very big inductor in series with the primary port of the relay. ...
... connected to the primary port of the relay. When the Irail voltage is 6 V, the secondary contacts are closed. When the I-rail voltage is 0 V, the secondary ports are open. • In the detector circuit there is an adjustable resistor, and a very big inductor in series with the primary port of the relay. ...
HERO Jr POWER SUPPLY PROTECTION
... Also of note the Futaba CH74 crystal pair, intended for AM use and for “Airtronics Only” radio control cars etc, has a TX crystal with a sticky label 75.670 TX and 75.670 RX. Removing these sticky labels reveals 37.835 engraved on the TX crystal and 75.215 MHz on the RX crystal. This RX crystal wor ...
... Also of note the Futaba CH74 crystal pair, intended for AM use and for “Airtronics Only” radio control cars etc, has a TX crystal with a sticky label 75.670 TX and 75.670 RX. Removing these sticky labels reveals 37.835 engraved on the TX crystal and 75.215 MHz on the RX crystal. This RX crystal wor ...
Dynamic instruction execution under loop delay constraints
... • Hence, any power-saving technique that saves less than 3x power over performance loss is uninteresting • Example 1: ...
... • Hence, any power-saving technique that saves less than 3x power over performance loss is uninteresting • Example 1: ...
Power electronics
Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)