- What's new in this club
-
mohammed alhadi joined the club
-
Mikhael Dean Veilour joined the club
-
SahmyOgal joined the club
-
Ruth joined the club
-
Ragil Gopi joined the club
-
Lambo joined the club
-
Zakariya joined the club
-
azan2004 joined the club
-
Francisco Javier González Rodríguez joined the club
-
Konstantinos joined the club
-
Khushal Jasani joined the club
-
Wisnu Prabowo joined the club
-
ayushmittal joined the club
-
najaf joined the club
-
Bassey Etu joined the club
-
Power factor is the cosine of the angle between the voltage and the current. It is the third factor in the product that expresses the power, P = V*I*cos(phi) where phi is the phase angle. DrD
-
What are real, reactive, and apparent power?
DrD replied to admin's topic in Electrical Machines's Conceptual Questions
Real power is just what it says, power as in work done per unit of time. In electrical systems, the real power is calculated as Preal = V*I*cos(phi) where V = voltage I = current phi = phase angle between current and voltage Reactive power is Preact = V*I*sin(phi) I've never heard the term "apparent power" but I suspect what you mean is what I know as Volt-Amperes = V*I The real power is the in-phase part of the volt-ampere product while the reactive power is the out-of-phase part of that product. DrD -
This process is called "field weakening" and it was used for speed control on the ancient rolling mill where I worked long ago. As the field current is reduced, flux must be cut more rapidly to maintain the back EMF. The only way this can happen is for the rotor to turn more rapidly, thereby cutting more flux per unit of time. DrD The term "linear machine" seems ambiguous to me. I think you intend to describe an electrical machine (motor) described by linear differential equations. The term can also be used to describe an electric motor for which the moving element translates rather than rotates. For a translating induction machine, the usual acronym is LIM, Linear Induction Machine. Such machines can also be built in synchronous form, known as LSM, Linear Synchronous Machines. The linear machines of this sort are being used to launch aircraft from aircraft carriers. DrD
-
Now that is an interesting question! Do you mean Ampere's circuital law? or Do you mean Ampere's force law?
-
Clement joined the club
-
Tanmay_hegde joined the club
-
Marl Zurita joined the club
-
Mohammad Abu Shamseiah joined the club
-
Lorenzo joined the club
-
DrD joined the club
-
Ranses joined the club
-
Marko Sović joined the club
-
Lucsd joined the club
-
What is power factor? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
The linear machine in Figure 1-19 is running at steady state. What would happen to the bar if the voltage in the battery were increased? Explain in detail. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is Faraday's law? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What are eddy current losses? What can be done to minimize eddy current losses in a core? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is hysteresis? Explain hysteresis in terms of magnetic domain theory. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is a ferromagnetic material?
admin posted a topic in Electrical Machines's Conceptual Questions
What is a ferromagnetic material? Why is the permeability of ferromagnetic materials so high? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer -
What is reluctance? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is magnetizing intensity? What is magnetic flux density? How are they related? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is Ampere's law? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
-
What is torque? What role does torque play in the rotational motion of machines? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer