Hunstable Electric Turbine - SV650.org

Seeker · 13-08-19, 08:18 AM

A "new" electric motor which can misalign its magnetic fields which is, apparently, a good thing (who knew?):

https://jalopnik.com/a-texas-startup...nce-1837173127

SV650rules · 14-08-19, 08:39 AM

Yes field weakening increases the speed of rotation but lowers the torque available, when we did motors at college ( too many years ago to think about )

https://www.sciencedirect.com/topics...akening-region

We were taught that in a series wound motor that as the load falls the current falls but flux falls faster in the field winding ( stator ) and the speed increases until it spins itself into oblivion... series wound motors had advantages but most are shunt ( parallel ) wound or smaller ones permanent magnet.

https://www.reddit.com/r/AskEngineer...motor_with_no/

If you watch the video of the Hunstable motor they replace the normal huge car battery with a battery that is about 90% smaller - they only claim 10% extra range
so bit of a liberty to replace a 90Kw/h battery with two alkaline 'D' cells....

13-08-19, 08:18 AM	#1
Seeker Member Mega Poster Join Date: Jun 2016 Location: NE Lincs Posts: 1,069	Hunstable Electric Turbine A "new" electric motor which can misalign its magnetic fields which is, apparently, a good thing (who knew?): https://jalopnik.com/a-texas-startup...nce-1837173127

14-08-19, 08:39 AM	#2
SV650rules Member Mega Poster Join Date: Nov 2016 Location: Shropshire UK Posts: 1,363	Re: Hunstable Electric Turbine Yes field weakening increases the speed of rotation but lowers the torque available, when we did motors at college ( too many years ago to think about ) https://www.sciencedirect.com/topics...akening-region We were taught that in a series wound motor that as the load falls the current falls but flux falls faster in the field winding ( stator ) and the speed increases until it spins itself into oblivion... series wound motors had advantages but most are shunt ( parallel ) wound or smaller ones permanent magnet. https://www.reddit.com/r/AskEngineer...motor_with_no/ If you watch the video of the Hunstable motor they replace the normal huge car battery with a battery that is about 90% smaller - they only claim 10% extra range so bit of a liberty to replace a 90Kw/h battery with two alkaline 'D' cells.... __________________ 2016 SV650 AL7 Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain Last edited by SV650rules; 14-08-19 at 08:48 AM.

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