Re: [EVDL] HPGC AC-31-01 Diagram or Manual

2017-01-29 Thread Bill Dube via EV 
The springs in the clutch center, and the torque-limiting nature of 
the clutch itself serve to limit peak torque in the transmission and 
driveline. The transmission and the driveline components need the clutch 
and its center springs to survive long-term.


It is not the torque _from_ the motor that is the source of the 
torque peaks, it is bumps in the road, like rail road tracks, that 
inject damaging torque spikes _into_ the driveline and transmission. No 
clutch to slip a little bit, or clutch center springs to absorb these 
spikes, and the transmission life becomes very very short.


Bill D.

On 1/29/2017 7:28 PM, Tom Keenan via EV wrote:

I also have an older DC powered conversion with a clutch. I've found that 
shifting with the clutch is much faster and much more forgiving.  I've driven 
it 'clutchless' a couple of times as an exercise, but found it to be very slow 
to shift with the foot off the clutch.  Matching motor speed with selected gear 
normally results in time wasted between gears waiting for the motor to wind 
down - traffic behind becomes very intolerant if you miss the split second 
between go and no-go.
Tougher on hills because the vehicle may slow down to almost nothing before the 
motor winds down enough to shift clutchless. Then you are back to square one 
(first gear again).
However, since AC motors have a much wider RPM operating range, frequent 
shifting isn't really necessary as with most DC motor conversions.
One conversion I've seen with an AC motor was a clutchless Geo Metro 
(Solectria). The AC motor twisted off the transmission input shaft in that 
particular vehicle twice, requiring a transmission replacement both times. 
Might be a poorly matched transmission design, or it might be that the clutch 
provides a bit of overtorque protection.
Based on what I've seen and operated for the last few years, I'd recommend 
retaining the clutch.  If you have a clutch-type conversion of any type 
available to test drive in your area, try to drive it both ways to see what 
fits your driving style before you commit.

Tom Keenan


On Jan 29, 2017, at 4:59 PM, Jay Summet via EV  wrote:

I have an S-10 conversion with the clutch left out, and you certainly can shift 
it without the clutch. But the shifts take several seconds as you wait for the 
motor to sync up in speed, and the time I spend coasting, unless planned well 
in advance to be going down a hill, etc, can cause cars to ride up on me.

If I were do another conversion, I would probably leave the clutch in, despite 
the efficiency hit, just so that you can shift quickly. That way you could 
start in 1st and shift to 2nd quickly, instead of using extra amps to start up 
(slowly) in 2nd.

I have a DC motor, so I find myself shifting between 2nd and 3rd gear around 40 
MPH. Perhaps with an AC motor that has a larger RPM range you could get 0-50 
which would be fine for all city driving, or even 0-60 MPH in one gear and 
shifting wouldn't be much of an issue.

Jay


On 01/29/2017 05:24 PM, Cruisin via EV wrote:
It doesn't surprise me of the lack of support from HPEVS. maybe their door is
locked
Regarding the AC-31 which I have a lot of experience with, the motor already
has a
front bearing. The information you received from the seller of the motor is
false. Do your
conversion but leave out the flywheel and clutch assembly. If you want to
shift, it can be done
without a clutch as long as you are not using regeneration, else you will
have to feather the
accelerator during the shift. NO CLUTCH NEEDED.

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Re: [EVDL] HPGC AC-31-01 Diagram or Manual

2017-01-29 Thread Tom Keenan via EV 
I also have an older DC powered conversion with a clutch. I've found that 
shifting with the clutch is much faster and much more forgiving.  I've driven 
it 'clutchless' a couple of times as an exercise, but found it to be very slow 
to shift with the foot off the clutch.  Matching motor speed with selected gear 
normally results in time wasted between gears waiting for the motor to wind 
down - traffic behind becomes very intolerant if you miss the split second 
between go and no-go. 
Tougher on hills because the vehicle may slow down to almost nothing before the 
motor winds down enough to shift clutchless. Then you are back to square one 
(first gear again).
However, since AC motors have a much wider RPM operating range, frequent 
shifting isn't really necessary as with most DC motor conversions. 
One conversion I've seen with an AC motor was a clutchless Geo Metro 
(Solectria). The AC motor twisted off the transmission input shaft in that 
particular vehicle twice, requiring a transmission replacement both times. 
Might be a poorly matched transmission design, or it might be that the clutch 
provides a bit of overtorque protection. 
Based on what I've seen and operated for the last few years, I'd recommend 
retaining the clutch.  If you have a clutch-type conversion of any type 
available to test drive in your area, try to drive it both ways to see what 
fits your driving style before you commit. 

Tom Keenan

> On Jan 29, 2017, at 4:59 PM, Jay Summet via EV  wrote:
> 
> I have an S-10 conversion with the clutch left out, and you certainly can 
> shift it without the clutch. But the shifts take several seconds as you wait 
> for the motor to sync up in speed, and the time I spend coasting, unless 
> planned well in advance to be going down a hill, etc, can cause cars to ride 
> up on me.
> 
> If I were do another conversion, I would probably leave the clutch in, 
> despite the efficiency hit, just so that you can shift quickly. That way you 
> could start in 1st and shift to 2nd quickly, instead of using extra amps to 
> start up (slowly) in 2nd.
> 
> I have a DC motor, so I find myself shifting between 2nd and 3rd gear around 
> 40 MPH. Perhaps with an AC motor that has a larger RPM range you could get 
> 0-50 which would be fine for all city driving, or even 0-60 MPH in one gear 
> and shifting wouldn't be much of an issue.
> 
> Jay
> 
>> On 01/29/2017 05:24 PM, Cruisin via EV wrote:
>> It doesn't surprise me of the lack of support from HPEVS. maybe their door is
>> locked
>> Regarding the AC-31 which I have a lot of experience with, the motor already
>> has a
>> front bearing. The information you received from the seller of the motor is
>> false. Do your
>> conversion but leave out the flywheel and clutch assembly. If you want to
>> shift, it can be done
>> without a clutch as long as you are not using regeneration, else you will
>> have to feather the
>> accelerator during the shift. NO CLUTCH NEEDED.

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Re: [EVDL] HPGC AC-31-01 Diagram or Manual

2017-01-29 Thread Jay Summet via EV 
I have an S-10 conversion with the clutch left out, and you certainly 
can shift it without the clutch. But the shifts take several seconds as 
you wait for the motor to sync up in speed, and the time I spend 
coasting, unless planned well in advance to be going down a hill, etc, 
can cause cars to ride up on me.


If I were do another conversion, I would probably leave the clutch in, 
despite the efficiency hit, just so that you can shift quickly. That way 
you could start in 1st and shift to 2nd quickly, instead of using extra 
amps to start up (slowly) in 2nd.


I have a DC motor, so I find myself shifting between 2nd and 3rd gear 
around 40 MPH. Perhaps with an AC motor that has a larger RPM range you 
could get 0-50 which would be fine for all city driving, or even 0-60 
MPH in one gear and shifting wouldn't be much of an issue.


Jay

On 01/29/2017 05:24 PM, Cruisin via EV wrote:

It doesn't surprise me of the lack of support from HPEVS. maybe their door is
locked
Regarding the AC-31 which I have a lot of experience with, the motor already
has a
front bearing. The information you received from the seller of the motor is
false. Do your
conversion but leave out the flywheel and clutch assembly. If you want to
shift, it can be done
without a clutch as long as you are not using regeneration, else you will
have to feather the
accelerator during the shift. NO CLUTCH NEEDED.

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Re: [EVDL] HPGC AC-31-01 Diagram or Manual

2017-01-29 Thread Cruisin via EV 
It doesn't surprise me of the lack of support from HPEVS. maybe their door is
locked
Regarding the AC-31 which I have a lot of experience with, the motor already
has a 
front bearing. The information you received from the seller of the motor is
false. Do your
conversion but leave out the flywheel and clutch assembly. If you want to
shift, it can be done
without a clutch as long as you are not using regeneration, else you will
have to feather the
accelerator during the shift. NO CLUTCH NEEDED.

--
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http://electric-vehicle-discussion-list.413529.n4.nabble.com/HPGC-AC-31-01-Diagram-or-Manual-tp4685630p4685637.html
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Nabble.com.
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[EVDL] EVLN: EV-newswire posts for 20170129

2017-01-29 Thread brucedp5 via EV 


http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-23k-Electric-truck-gt-VEC-designed-y-hecho-en-Mexico-r-100km-ts-160km-td4685635.html
EVLN: $23k Electric truck> VEC designed (y hecho en México) r:100km ts:160km
Designers see market for light-duty truck
A new, made-in-Mexico light-duty electric truck was presented this week ...
Its designers said ... batteries belong to the latest li-iron generation,
which can last for 10+ years ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Designer-Trubridge-s-3PV-off-grid-home-nz-charges-his-xUK-showroom-i3-EV-td4685634.html
EVLN: Designer Trubridge's 3PV off-grid home.nz charges his (xUK-showroom)
i3 EV
So he's very pleased with his recent investment - an electric car ... The
investment that Trubridge has made in the car is a reflection of his strong
environmental ethos and vision, which has also shaped his business ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Okinawa-Scooters-launches-its-1st-e-scooter-gt-Ridge-priced-at-INR43-702-642-td4685633.html
EVLN: Okinawa Scooters launches its 1st e-scooter> Ridge, priced at
INR43,702($642)
EVs are increasingly becoming the need of the hour and paying attention to
this need are several electric bike manufacturers in India ... Okinawa to
invest ₹270 crore to expand e-vehicle business ... The company will launch
another e-scooter in the next quarter and ...

+
http://electric-vehicle-discussion-list.413529.n4.nabble.com/Tata-has-not-given-up-on-an-Electric-version-of-the-Nano-tp4685632.html;cid=1485620127576-916
Tata has not given up on an Electric version of the Nano
It seems Tata Motors is not ready to give up on their Nano compact car. The
ambitious project could not translate into a real life blockbuster even
after a ton of ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/6-US-based-Bangladeshi-engineers-contributions-toward-GM-Bolt-EV-s-top-car-award-td4685631.html
6 US-based Bangladeshi engineers' contributions toward GM Bolt EV's top car
award
Bangladeshi engineers working for General Motors have played remarkable role
in the designing, developing, manufacturing and launch of the award-winning
car ...




http://evdl.org/evln/
For all EVLN EV-newswire posts


{brucedp.neocities.org}

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