🚀 go-pugleaf

In article <1992Dec18.012654.26238@ra.oc.com> rodder@ccwf.cc.utexas.edu (Jon D. Rodder) writes:
>In article <1992Dec17.011649.987@cmkrnl.com> jeh@cmkrnl.com writes:
>>
>>Then we come to electric motors to drive the wheels.  Electric motors have
>>wonderful torque/speed characteristics for vehicles (they generate maximum
>>torque just before stall speed, which may make transmissions and clutches
>>unnecessary) but lousy power density -- look at the size of a 1-hp. electric
>>motor sometime and tell me how big a motor would have to be to accelerate a
>>car fast enough to keep up with gasoline-powered ones.  
>>
>>Internet:  jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
>
>Well, lets see..  the 20hp permanent magnet motor in our solar powered car
>is about 6 inches in diameter and 6 inches long.  It weighs under 20lbs.
>See the GM Impact for a production style example of a compact high power
>motor.
	I was waiting for someone to reply to this comment (I lost the
original message).  The 20hp DC brushless motor in our solar
car is also about 6" in diameter and less than 6" (not counting the cooling
fan and wiring set-up attached to the side) long.    I haven't weighed the
motor recently so this is from memory but I thinkj it weighs about
30 lbs.  Sounds pretty compact to me - plus it delivers virtually all
of its torque at 0 rpm and continues to have virtually constant 
torque charactericts for a much broader range than any IC engine.

>-=<   Jon Lusky ----- rodder@ccwf.cc.utexas.edu   >=-- 


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Jason R. Haines		     University of Pennsylvania (SEAS & Wharton)
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   Red '90 Mustang LX 5.0    /     Blue '71 Rotary Powered Datsun 510
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