Reciprocating solenoid motors and other alternative designs - DIY Electric Car Forums
Go Back  

DIY Electric Car Forums > EV Conversions and Builds > Electric Motors

Register Blogs FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 07-31-2012, 11:57 PM
PStechPaul's Avatar
PStechPaul PStechPaul is offline
Senior Member
 
Join Date: May 2012
Location: Cockeysville, MD 21030
Posts: 2,041
PStechPaul is on a distinguished road
Cool Reciprocating solenoid motors and other alternative designs

I've been fascinated by motor design and I have some ideas I want to to try for alternate designs. I was thinking about emulating a piston type ICE using electrical solenoids, and I found some really beautiful designs:









I don't know if they have any practical use in EVs but they are really cool looking and I'm thinking about building one. Probably a three-solenoid radial.

Last edited by PStechPaul; 08-01-2012 at 12:00 AM.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 08-01-2012, 02:57 PM
Salty9 Salty9 is offline
Senior Member
 
Join Date: Jul 2009
Location: 42.596N 122.688W
Posts: 747
Salty9 is on a distinguished road
Default Re: Reciprocating solenoid motors and other alternative designs

Interesting motors. I've been following http://www.rcgroups.com/ornithopters-101/

Where I think linear motors could be used in place of rotory motors and their associated gearing.
Reply With Quote
  #3  
Old 08-01-2012, 04:43 PM
PStechPaul's Avatar
PStechPaul PStechPaul is offline
Senior Member
 
Join Date: May 2012
Location: Cockeysville, MD 21030
Posts: 2,041
PStechPaul is on a distinguished road
Exclamation Re: Reciprocating solenoid motors and other alternative designs

My idea is to use an electromagnetic linear actuator which might be designed using simple solenoids and a ferromagnetic core:
http://www.scs-europe.net/conf/ecms2...2_4d5d6081.pdf

Or possibly a linear induction motor similar to this:
http://www.h2wtech.com/Pages/AC-Line...on-Motors.aspx

It is capable of a force of 650 pounds which would translate to a torque of 300 lb-ft on a 12" diameter wheel. It can move at up to 350 inches per second so for the same wheel that is 557 RPM. This works out to 32 HP. It is actually 185 amps peak at 400 VAC which is 128kW or 170 HP. So either it's very inefficient or I've calculated wrong. This thing weight 420 lb so that's about right for a 32 HP motor, but this is peak so the weight is more in line with the 170 HP peak or about 50 HP continuous.

One cool thing about a reciprocating motor is that you can change the torque and speed by moving the crankshaft point in and out from the center. It's an interesting concept since the linear velocity is determined by the drive frequency, but it would have to be modulated as it moved around the driveshaft and reversed every half-revolution.

It might be best to adjust the spacing of the stator to compensate for the change of linear speed along the stroke. Then a fixed frequency could be used and it would only need to be reversed at the end of stroke.
Reply With Quote
Reply

Share or Bookmark this

Tags
art, creativity, machining, magnetics, motors

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 
Support DIY Electric Car
Sponsors

All times are GMT -6. The time now is 12:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

Ad Management by RedTyger