In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity.[1][2][3] Power is a scalar quantity.
Specifying power in particular systems may require attention to other quantities; for example, the power involved in moving a ground vehicle is the product of the aerodynamic drag plus traction force on the wheels, and the velocity of the vehicle. The output power of a motor is the product of the torque that the motor generates and the angular velocity of its output shaft. Likewise, the power dissipated in an electrical element of a circuit is the product of the current flowing through the element and of the voltage across the element.[4][5]
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The dimension of power is energy divided by time. In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a horse; one mechanical horsepower equals about 745.7 watts. Other units of power include ergs per second (erg/s), foot-pounds per minute, dBm, a logarithmic measure relative to a reference of 1 milliwatt, calories per hour, BTU per hour (BTU/h), and tons of refrigeration.
As a simple example, burning one kilogram of coal releases more energy than detonating a kilogram of TNT,[6] but because the TNT reaction releases energy more quickly, it delivers more power than the coal.If W is the amount of work performed during a period of time of duration t, the average power Pavg over that period is given by the formula P a v g = W t . {\displaystyle P_{\mathrm {avg} }={\frac {\Delta W}{\Delta t}}.} It is the average amount of work done or energy converted per unit of time. Average power is often called "power" when the context makes it clear.
Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a torque on a shaft and the shaft's angular velocity.
In fluid power systems such as hydraulic actuators, power is given by P ( t ) = p Q , {\displaystyle P(t)=pQ,} where p is pressure in pascals or N/m2, and Q is volumetric flow rate in m3/s in SI units.
In the case of a periodic signal s ( t ) {\displaystyle s(t)} of period T {\displaystyle T} , like a train of identical pulses, the instantaneous power p ( t ) = | s ( t ) | 2 {\textstyle p(t)=|s(t)|^{2}} is also a periodic function of period T {\displaystyle T} . The peak power is simply defined by: P 0 = max [ p ( t ) ] . {\displaystyle P_{0}=\max[p(t)].}
With the conclusion of the original series, it was announced that Starz had planned four upcoming spin-offs in the same universe as Power. These begin with Power Book II: Ghost, which, following shortly after the events of the original series, focuses on Ghost's son Tariq navigating his new criminal life and intending to shed his father's legacy while dealing with mounting pressure to protect his family, including his mother Tasha. The series co-stars Mary J. Blige and Method Man.[35] The other spin-offs include: Power Book III: Raising Kanan, a prequel into the life of Kanan Stark (50 Cent); Power Book IV: Force, which follows Tommy Egan (Joseph Sikora) to Los Angeles, California and ending up in the city of Chicago; and Power Book V: Influence, a sequel set in the political world centering on Councilman Tate's (Larenz Tate) ruthless rise to power.[36][37] The development of Power Book V: Influence was cancelled in August 2022 and the series would not be moving forward.[38]
The Distributed Energy conference brings together utility-scale electricity providers with other power generators, including commercial and industrial facilities, educational institutions, cooperatives, and private enterprise, to dive into real-life applications, project planning, and the business and financial aspects of distributed generation.
HydrogeNext covers the full hydrogen energy value chain from production to distribution and end-use, bringing together power generation and chemical process industry professionals to collaborate and learn about the fast-paced advances being made toward a hydrogen economy.
Digital technology improvements and an ever-growing field of applications are reshaping the power and chemical process industries.bStay on top of key trends and possibilities at the Connected Plant Conference - The ONLY event covering digital transformation/digitalization for the power and chemical process industries.
USAID and Power Africa are building a public-private partnership to improve access to clean electricity and internet connectivity at health facilities in sub-Saharan Africa. Through renewable energy and digital solutions, this alliance can deliver reliable, climate-friendly, life-saving power to 10,000 remote health facilities.
POWER works with faith communities in Southeastern and Central Pennsylvania to address local and statewide issues while simultaneously strengthening the life of our congregations. Our path to creating a more just world involves teaching people of faith how to build and exercise their own power to address root cause of the daily injustices they face.
Get customized reports for each team member involved, benefit from realtime digital strategy shifts fueled by machine learning, and dominate your space with the power of nova - our proprietary technology platform.
PowerOutage.us is an ongoing project created to track, record, and aggregate power outages across the United States. Find out about us on our About page.
Click on a state to see more detailed info.
Data is updated site wide approximately every ten minutes.
Robust and high efficient Thyristors & Diodes in presspack or module housings for high power applications like electrical drives, voltage soft starters, general purpose power supplies and even complex energy transmission systems.
The product offering provides power stage solutions with highest efficiency and power density such as DrMOS and DrBlade. With DrBlade Infineon offers a new ultra-compact integrated MOSFET halfbridge driver, based on the revolutionary Blade chip embedding technology.
POWER MOVES: Your essential philanthropy assessment guide for equity and justice is a complete self-assessment toolkit to determine how well you are building, sharing and wielding power and identify ways to transform your programs and operations for lasting, equitable impact.
The BlindermanPower project team structure provides a direct chain of command that clearly defines management authority, accountability, and decision-making power. Each team consists of technical professionals with relevant project experience and the know-how to lead and coordinate a proactive, efficient, value-based decision-making process.
e-POWER is Nissan's unique electric-drive powertrain that integrates a gasoline engine and motor.
Since the engine only generates electricity and the system is 100% driven by a high-output motor, it is possible to enjoy the driving experience of an EV.
e-POWER utilizes motor control technology cultivated in past EV development activities, powertrain integration technology, and energy management technology. By changing the combination of electric-drive motors and power-generation engines, it delivers quiet driving with excellent response over a wide range of vehicles from compact cars to minivans and SUVs.
Since e-POWER is 100% motor-driven, it provides a responsive and powerful driving experience, by taking advantage of the characteristic that the motor can generate maximum torque from when it starts.
The system can freely control engine start timing because the engine is not directly connected to the wheels. It provides very quiet driving with reduced engine operation time by driving the vehicle with just the motor from start to low/mid-range speed and starting the engine and generating electricity in fast speed areas with elevated road noise. It also achieves low fuel consumption because it generates electricity at efficient engine RPM.
The e-POWER system is comprised of a high-voltage battery and the powertrain, which is integrated with a high-power motor, inverter, gasoline engine, and a generator. In conventional hybrid systems, the wheels are driven by an electric motor and a gasoline engine. However, in the e-POWER system, the wheels are driven by a high-output electric motor like an EV.
Since the engine connected to the generator only charges the battery and does not directly drive the wheels, it is possible to freely set the start timing and efficient RPM. Generated electricity charges the high-voltage battery and directly drives the motor.
The second-generation e-POWER system delivers an attractive experience over a wide range of vehicles from compact cars to minivans and SUVs with a compact and high-output integrated inverter and motor and optimal engine combinations.
The e-POWER system in compact cars is in a compact engine room with a 1.2L engine. Despite the low-displacement engine, this system realizes motor-driven performance that generates high torque from when it starts and beyond-class powerful, smooth acceleration.
For minivans, Nissan developed a dedicated e-POWER engine that realizes EV-like driving even with a heavy vehicle body. By using a dedicated e-POWER engine, it is possible to have an optimal design that factors in integration and realizes high unit rigidity. Nissan curtails engine vibration through a synergy effect with a primary balancer shaft and flexible flywheel. Hence, it delivers excellent quietness even at times with high engine RPM for scenarios situations requiring large amounts of power generation, such as passing another vehicle.
For SUVs, Nissan simultaneously achieves overwhelming power and excellent quietness at a high level by combining the e-POWER system with its proprietary variable compression ratio engine (VC turbo engine). Combined use of the engine and turbocharger enables the vehicle to deliver high torque on par with a large displacement engine, despite the 1.5L, small-displacement engine that it has, by lowering the compression ratio and raising boost pressure, such as when driving at full throttle. Delivery of a high power-generation capacity at low RPM with this design provides quiet and comfortable driving in all situations. be457b7860
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