/diy/ - Do It Yourself

>>619811
Industrial lifting electromagnets are designed with both pole faces at one side (the bottom). This confines the field lines to maximize the magnetic field. It's like a cylinder within a cylinder. Many loudspeaker magnets use a similar geometry, although the field lines are radial from the inner cylinder rather than perpendicular to the face. An electromagnet has many applications in industries. The principle of operation of electromagnet forms the basis on which relays and contactors were designed. In transport industries, the present’s magnetic levitated electric train uses an electromagnet to suspend the whole train in some industries an advert is suspended on air by the use of electromagnet. In laboratories electromagnet is used in the levitation control experiment.

>>619849

Industrial lifting electromagnets are designed with both pole faces at one side. This confines the field lines to maximize the magnetic field. It's like a cylinder within a cylinder. Many loudspeaker magnets use a similar geometry, although the field lines are radial from the inner cylinder rather than perpendicular to the face. An electromagnet has many applications in industries. The principle of operation of electromagnet forms the basis on which relays and contactors were designed. In transport industries, the present’s magnetic levitated electric train uses an electromagnet to suspend the whole train in some industries an advert is suspended on air by the use of electromagnet. In laboratories electromagnet is used in the levitation control experiment. Electromagnet is not very common in our market therefore this paper gives a method of designing, constructing, testing and getting the parameters of the magnet.

>>619502
brewster angle man

assuming you are starting in air and using glass plates
thetaB = arctan(n_air/n_material)

the reason there are more plates than one is because if you aren't at the exact angle some will pass or reflect.

there are different indexes of refraction of bulk material and thin film material.

>>618960
does your surface area take into account the empty spaces between the active device?

this matters.

>>615950
>If the sun is shining on my panels for 1 hour it produces 216 Watt/hours, right?

no

I'll focus on the solar part of efficiency.
The sun emits an nice near black body radiation spectrum and the atmosphere absorbs some parts of it. The total watts that actually hit the ground depend on what time of year (6 % variation due to the suns angle at noon and the distance away from the sun), the part of the globe you are in (the atmosphere is thicker is due to sun's angle), the time of day (obviously), and the angle of the solar panel (should be directly to the sun).

The most accepted value for the US is AM 1.5 G which is 1000 watts. So that is 1000 joules per second. Multiply that by 1 hour 3.6mega joules or simply 1000 watt*hours. Times that by 15% efficiency you 150 Watthours or 540kilojoules.

watt/hours is a power rate or (1/3600 joules/seconds^2) it can also be called energy acceleration(notice the seconds squared in the denominator). watt*hours is energy.

usually 15% is a rounded number. What type of solar cell is it?