I am making a generator powered by magnets with the rotor carrying magnets and stator holding coils and hall effect switches to direct enough current to keep up the momentum ongoing. The coils are designed based on the strengths of tge magnets by testing the distance at which the magnet begins to pick up a paperclip. Very rudimentary instructions.
I don’t understand the how, to choose what size, positioning, sensitivity, polarity, of the hall effect switch for optimum utilization. Can someone point Me in the right direction for engineering principles, good study materials, and/or advice on what specs to order hall effect switches. I’d like to have a working knowledge of them, and all their specs, how each spec changes the characteristics and why a person would choose variations of sensitivities, inputs ouputs, based on new designs or different sizes of coils and magnet strengths, etc.
What are the equations to measure the best positions for hall effect switches on tge stator side, and what metering tools are best to measure the relevant inputs ouputs of, say for example, magnetic field strengths stationary or fluxes during rotation.
Thank you.
I am using 3/4” diameter by 1” tall NdFeB magnets with “N45” strengths, if I recall correctly. The rotor being a circular cutout of 3/4” plywood with magnets glued into cutouts at the edges around the outside, equidistant.
It’s not clear how sensitive of a hall effect switch to order, or how far to place them from the magnets, or what calculations and or measuring devices are best to answer this for myself through math and experimenting.
Hall effect switches sensitive to magnetic field inductions, different sensitivities, designs, structures
@erik.tahern
The distance of the sensor can mostly be something you pick. I would recommend choosing a range of distances and find the magnetic strength that should be expected for that range of distances. This is so that when you are looking for the sensors you can have a higher chance of finding one that can fit any of the other specifications and also still work with the distance that you find to be accept able for your needs.
In the below link it shows the sensors found on our site. We list the trip and release values for the item we have. once they are selected then I would recommend looking over the variables to see what other decisions that need to be made for your design.
Switches (Solid State) | Magnetic Sensors | Electronic Components Distributor DigiKey
@erik.tahern
You can directly test the strength values using a meter tool as shown in the below link.
I would recommend looking at the ones that that the probe that you can use to be more direct in where you are thinking you would like the senor to be relative to the rest of the device.
Environmental Testers | Test Equipment | Electronic Components Distributor DigiKey
