Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Paul & Sabrina's cheap DIY 144v motor controller

duncan · 12-11-2011, 06:28 AM

Hi Paul,

Thanks for the info
I still have a question (I must be dense today)

If the TPS is over 5000Ohms - does the controller go to zero or max (500 amps)?

I am looking at possible failure modes -
I have a very nice Subaru TPS which has 10KOhms resistance and a nice zero position switch

I was thinking about using a parallel resister to drop it to 5KOhms
i.e. a 10KOhms resister in parallel
One of the possible failure modes would leave 10KOhms - would that be max throttle? or a nice safe - fault - default to zero ?

I'm hoping to get the car rolling over the summer holidays - then I will have to get it certified - then take it to bits to paint it!
(the certifier needs to see the chassis unpainted to check my brazing)

12-11-2011, 06:28 AM	#5270 (permalink)
duncan EcoModding Apprentice Join Date: Oct 2010 Location: southland NZ Posts: 153 Thanks: 38 Thanked 86 Times in 55 Posts	Hi Paul, Thanks for the info I still have a question (I must be dense today) If the TPS is over 5000Ohms - does the controller go to zero or max (500 amps)? I am looking at possible failure modes - I have a very nice Subaru TPS which has 10KOhms resistance and a nice zero position switch I was thinking about using a parallel resister to drop it to 5KOhms i.e. a 10KOhms resister in parallel One of the possible failure modes would leave 10KOhms - would that be max throttle? or a nice safe - fault - default to zero ? I'm hoping to get the car rolling over the summer holidays - then I will have to get it certified - then take it to bits to paint it! (the certifier needs to see the chassis unpainted to check my brazing)