I am doing a school project where I am trying to make a fan (which will become a rotor) with permanent magnets attached to its fins so that motion and the spinning of the fan will be caused by electromagnets being energize to either repel or attract (still debating) the fan's magnets (the rotor) and I plan to wire the electromagnets so that they pulse on and off (I also plan for the circuit to switch the intensity and the duration of energizing the electromagnets depending on what speed (rpm) the fan is spinning at) through the use of capacitors and flash capacitors to control the timing and the strength of the electromagnets . The pulsing effect will differentiate depending on at what state the fan is in (either timed or sensed through speed sensors or electrical sensors like transistors[because a faster moving rotor produces more amps than one that's rotating slower]) If it's timed, I'll just have to find an actuator that will switch the circuits accordingly to some sort of timing mechanism, where the first circuit will remain closed longer than the second (help increase the acceleration of the fan's rotation) and again switch to another circuit with more intense and faster discharging capacitors to keep the fan rotating faster and faster, until it reaches to the point where the electromagnets cannot energize fast enough to keep up with controlling the speed of the fan. OH ! I forgot to mention that the electromagnets will be energized by a battery source (which it's rating will depend on the total energy I would require to execute the start up process, up until the generating phase kicks in)
About my project, where should I start? I want to make a fan that will be small but not too small (small enough to make a school demonstration). But I want it to be big enough to actually produce enough electricity when I plant the permanent magnets to it [because I heard that permanent magnets strength depends on the size of it's diameter only]. Also about the electromagnets, does the size and diameter of the iron core matter? And how many times should the wire be twisted onto the core and how many layers should I make and how thick should the wire's gauge should be? (Because I understand that after a certain point the electromagnet losses it magnetism because of the distance and how far apart the wires are from the core.) And is there a correlation on how much amps/dc electrical sources are needed to make an electromagnet's gauss match a permanent magnet's gauss? Since I want to produce a lot of current, enough to create electrical power that will be enough to create kinetic energy to displace the weight of the fan to cause it to rotate, I will use fairly big permanent magnets (makes since to me as there will be enough room because I will use a 4 blade fan)
It will be similar in principle to this electromotor:
http://ift.tt/1zTpBd4
I will place stators on both sides of the permanent magnets into the housing of my generator. As for the push vs the pull (whether I should make the electromagnets repel or attract the permanent magnets in the fan) I heard that repelling creates more force whereas attraction has a lot of room to avoid errors and mistakes when it comes to timing. Someone told me to use attraction as this would allow me to use reed switches that will help with the timing as the electromagnet attracts the permanent magnets and if the electromagnets are still energized, they would help deactivate them.
Of course I am not making a free energy device of any sort as this would have a short life perhaps of a few years at most. I choose the design of a fan for the rotor to make it easier to understand my project and because other rotors deal with eddy currents that fight the currents and also cause heat to demagnetize the permanent magnets (a fan will also have a blowing/cooling effect). Any help so far?
About my project, where should I start? I want to make a fan that will be small but not too small (small enough to make a school demonstration). But I want it to be big enough to actually produce enough electricity when I plant the permanent magnets to it [because I heard that permanent magnets strength depends on the size of it's diameter only]. Also about the electromagnets, does the size and diameter of the iron core matter? And how many times should the wire be twisted onto the core and how many layers should I make and how thick should the wire's gauge should be? (Because I understand that after a certain point the electromagnet losses it magnetism because of the distance and how far apart the wires are from the core.) And is there a correlation on how much amps/dc electrical sources are needed to make an electromagnet's gauss match a permanent magnet's gauss? Since I want to produce a lot of current, enough to create electrical power that will be enough to create kinetic energy to displace the weight of the fan to cause it to rotate, I will use fairly big permanent magnets (makes since to me as there will be enough room because I will use a 4 blade fan)
It will be similar in principle to this electromotor:
http://ift.tt/1zTpBd4
I will place stators on both sides of the permanent magnets into the housing of my generator. As for the push vs the pull (whether I should make the electromagnets repel or attract the permanent magnets in the fan) I heard that repelling creates more force whereas attraction has a lot of room to avoid errors and mistakes when it comes to timing. Someone told me to use attraction as this would allow me to use reed switches that will help with the timing as the electromagnet attracts the permanent magnets and if the electromagnets are still energized, they would help deactivate them.
Of course I am not making a free energy device of any sort as this would have a short life perhaps of a few years at most. I choose the design of a fan for the rotor to make it easier to understand my project and because other rotors deal with eddy currents that fight the currents and also cause heat to demagnetize the permanent magnets (a fan will also have a blowing/cooling effect). Any help so far?
0 commentaires:
Enregistrer un commentaire