Greg,
It appears that simply scaling a helicopter up or down from existing craft or from existing algorithms will present problems. Pascal has previously designed and built, but not flown, a conventional single seat helicopter with a reciprocating engine.
His electric helicopter was designed...
Mike,
This is a short answer to your question.
"The distinction between various electric powertrain technologies is becoming more blurred as performance improves. A fuel cell uses some kind of hydrocarbon fuel, with hydrogen favoured for transport applications but heavy oils possible for...
This is not a specific question but it might make for some interesting technical questions and answers.
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The World’s first manned flight of a 100% electric powered helicopter was conducted on the 12th of August 2011, after 2 weeks of tethered flight tests. This machine...
electricpete
Hi. Yes I am unsure in reference to your use of [OD] and [ID].
This motor is an 'inside-out motor', where the rotor is located outside the stator. The shoe is at the OD of the stator and yoke is at the ID of the stator.
Are you are saying that laminates can be shorted at the...
Bill
The aluminum tube will be a singular one that fits the large hole in the center of the stator. It will not be a series of small tubes near to and located around the inner circumference.
However, your remarks are probably applicable to both situations. There is obviously much researching...
The desire is to insert a press-fit aluminum tube inside a stator laminate stack on an outrunning PM motor. http://www.unicopter.com/1952.gif The intention is to use this aluminum tube as a heat sink for the motor. A heat transfer compound (probably non-silicone) will be pasted between the...
Curt,
Your explenations were very clear and I thank you for them, including your later elaboration.
My last posting was the one that lacked clarity.
Item 2/ was for the addition of a separate permanent magnet coupling between the two rotors to enhance the synchronization...
sreid & Curt
Thank you for taking the time to comment on my perhaps novel requirement.
I am under the impression that;
1/ The two motors will hold synchronization as long as; they are very close to sync. AND that any moment that attemps to disrupt this sync. is relatively small.
2/ The two...
blacksea,
Sorry for the delay in responding.
The rotors are always to rotate in the same direction and at the same speed, as you mentioned.
The motors have 36 wound poles in their stators. This represents 10-degrees of mechanical rotation per phase change. I am hoping that the...
Curt thanks for your knowledge, which certainly far exceeds mine.
The help you have given will be digested and looked into further. As you suggest, we may electrically couple two motors in various ways and then subject them to different physical conditions. It may be a fun experiment.
Thanks...
Curt.
Thanks for your additional comments.
The two motors are to serve a pair of aerodynamic rotors, with, one motor per rotor. The speed of the rotors is fairly constant. The intent is to provide 'soft' mechanical restraints to assure that the 3-phase motors cannot get more than 360 / (3 *...
compositepro.
Thanks for the suggestion however I do not think that the stepper motor will meet the requirements.
Curt,
From what you are saying it appears that a single inverter/controller that is feed the averaged Hall position signal will not work, or at least not work with a sufficient...
Is it possible to drive two mechanically unconnected brushless PMDC motors from a single controller? The idea is for both motors to have their own Hall effect sensors. Their signals would be feed to a sort of comparator-timer where the mean-time of the two signals would be added to the time...
waross,
This is the drawing that you requested. The lower left quadrant is of the proposed new lamanate. The other three quadrants are the laminates of the existing motor. http://www.unicopter.com/Temporary/1926_All.jpg
The inward facing 'teeth' are to be located in a hollow core. There will...
Pete, thanks for the time and answers that you have provided.
The following is an answer to your question and an elaboration on the query of this thread.
Yes, the intention will be to remove all burrs.
The following is a picture of a purchased stator for an outrunner PM motor...
The intention is to have numerous bolt-holes located at a constant radius around the ring of the laminates in a stator. Then bolts will be inserted in these holes to hold the laminates together and to attach the stator to the supporting structure.
My concerns are;
~ Will steel bolts...
electricpete
"There already is a capacitor in the circuit. I'm not sure where and extra one would go."
The capacitor was added to the linked diagram after itsmoked sugested adding it. My error, by not stating that the diagram had been changed.
Your information is now to be digested. Thanks
Dave
