Senior design - Eddy Current Dynamometer for FSAE
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- čas přidán 18. 05. 2016
- Final product for the senior design class at San Diego State University. This is the final run with an electric motor hooked up to the dyno to spin the rotors and demonstrate the electronics and hardware. The software uses the MATLAB to Arduino interface, taking in sensor readings from the dyno and allowing the tuner to analyze the data while adjusting load conditions.
In this test, only half the coils were energized for demonstration purposes.
Almost everything seen on this dyno was fabricated by the students, including the electromagnets.
A very big THANK YOU to our sponsors: Aztec Racing, Futek Load Cells, Achates Power, and Zugner, LLC. Without your support, none of this would have come to fruition. Thank you for allowing us to do what we love and learn as developing engineers along the way. Stay tuned for additional tests in the near future!
Check out our sponsor websites!
Aztec Racing: fsaeaztecracing.wix.com/aztec-...
Achates Power: www.achatespower.com
Futek: www.futek.com, / futekadvsensortech
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Very interesting and nice. Congrats for all. Can you send me some more infos about this project?
can you share the schematics and hardware list?
This looks great. We are currently working on an Eddy brake Dyno for our FSAE team as a senior project as well. Was wondering if you have any recommendations about what to watch out for.
Do you have pdf about it
How do you exactly measure the load? I would really appreciate if you could share the details of how the load cell is implemented. Also what is the max power and torque of your motor?
A simple torque sensor (load cell) for anyone curious.
Very cool.
Did the dynamometer scale to FSAE power levels? Is it repeatable and what is the resolution? I'm assuming accuracy isn't as important. Also, how hot do the brake rotors get?
hi! great project! would u share how you built it? tnx!
Was this a full scale rig for the FSAE car and how many hp could it handle? I'm assuming that in action the brake rotor would be doing closer to 2500 rpm -ish.
She said about 60hp max
Hi! Nice project! How do you mount your car brake disc to the shaft? They need to be really tight together for the system to work reliably. Thanks!
Thats not how it works or why its there.
I agree, Totally awesome build. I'd love to get the details on the coil fabrication (gauge wire, number of turns, core material/dimensions) as well as the power supply details (schematic or basic specs on the PWM system). Surely you were required to do a write up for class. Why not share? Retarder dyno projects like this are few and far between. Did you publish your details and results anywhere?
so is the idea to basically apply an electric current, which should have a known (determined by windings, current, length of windings), or only measured torque value on the opposing motor? I suppose only the measurement is really important, unless you want to determine how efficient your brake is. So the kind of measurement you can take here is the torque compared to P[in]. Can you derive P[out] with an RPM measurement?
Hi James. Yes, the purpose of an engine dynamometer is to determine both the torque and power a motor produces. As you mentioned, we are not concerned with how much power the electromagnets consume (other than to design an appropriate power supply for it) but how much power a motor is capable of producing. If you have torque (lever arm times the force read at the load cell), then you can easily calculate power (in our case kW or HP). These parameters are important for Formula SAE car engineering in order to determine the requirements of all other systems (drive train, suspension, chassis, brakes, etc.).
Hi,
Great Job guys, I just wanted to know whether you used a compression type load cell or tension load cell.
if she had stuck with this she probably have a working commercial dyno today.
Totally awesome build. I'd love to get the details on the coil fabrication (gauge wire, number of turns, core material/dimensions) as well as the power supply details (schematic or basic specs on the PWM system). Surely you were required to do a write up for class. Why not share? Retarder dyno projects like this are few and far between. To only tease us with this video and move on to your next grade is simply not fair!
@Heads Mess Yes. You are absolutely correct. More than one way to skin a cat. I've had a lifelong struggle with analysis paralysis. Sometimes diving right in can be the way to go. But two things can be true at the same time, and I rather enjoy the satisfaction of the maths, schematics and thesis. I've scoured the salvage yards and even contacted the manager of the Telma-laden fleet of the local Casella waste services looking for a discard. Came close to getting lucky only once. Maybe time to follow your lead...