Which Motor?

AC, DC, amps, volts and kilowatt. It's all discussed in here
Post Reply
Mawson
Noobie
Posts: 4
Joined: Sat, 17 Feb 2018, 06:31
Real Name: Phil Huband

Which Motor?

Post by Mawson » Sun, 12 Aug 2018, 08:07

Hi Everyone. I'm converting a 1963 Renault Floride to electric. The car will weigh just under 1,000 kilograms with the battery pack.
I've looked at the HPEVS AC50 motor which they tell me will power the car up hills at highway speed with a 96 volt battery pack. I've also found a Chinese AC motor which is supposed to be equivalent. However, the performance graphs supplied by the manufacturers are presented quite differently and I don't have enough knowledge to make a decision. Can anybody have a look and give me any advise? I would be most grateful
Attachments
15kw+curve.png
15kw+curve.png (114.02 KiB) Viewed 206 times
Screenshot_2018-08-12 ac50 96 volts metric continuous graph TE NF pdf.png
Screenshot_2018-08-12 ac50 96 volts metric continuous graph TE NF pdf.png (123.68 KiB) Viewed 206 times

User avatar
brendon_m
Groupie
Posts: 46
Joined: Sat, 28 Oct 2017, 11:00
Real Name: Brendon McCarrol

Re: Which Motor?

Post by brendon_m » Sun, 12 Aug 2018, 08:40

I've noticed that a lot of Chinese motors use that style of graph and I assume it's done in order to make it harder to compare them to non Chinese "quality" units. I mean who cares about torque vs kW. Just give me the data vs rpm so I can read what's going on

User avatar
jonescg
Senior Member
Posts: 2246
Joined: Thu, 21 Jan 2010, 23:05
Real Name: Chris Jones
Location: Perth, WA.

Re: Which Motor?

Post by jonescg » Sun, 12 Aug 2018, 10:43

You will definitely need the gearbox - anything under 200 Nm is a bit weak for pushing 1000 kg of car around.
AEVA National Secretary, WA branch vice-chair

User avatar
Richo
Senior Member
Posts: 3248
Joined: Mon, 16 Jun 2008, 00:19
Real Name: Richard
Location: Perth, WA

Re: Which Motor?

Post by Richo » Mon, 13 Aug 2018, 13:19

Mawson wrote:
Sun, 12 Aug 2018, 08:07
I've also found a Chinese AC motor which is supposed to be equivalent.
Firstly I notice the Chinese motor is a very high spinning motor.
More resembles a large outrunner?!?
At the nominal voltage tested is does 6400RPM!
So to get the claimed power it has to spin much faster.
I probably wouldn't suggest this motor.

Ignoring the high RPM it does have enough torque for a small car using a gearbox.
Do you know what voltage the test was performed at?
brendon_m wrote:
Sun, 12 Aug 2018, 08:40
...Just give me the data vs rpm so I can read what's going on
The graph is for the motor by itself.
The graph you want is for a complete system.
Unfortunately unless you are buying that compete system the data would be limited.
jonescg wrote:
Sun, 12 Aug 2018, 10:43
...anything under 200 Nm is a bit weak for pushing 1000 kg of car around.
So the 700kg Handi at 90Nm with a 2.5x for a 1-2 gear ratio is 225Nm.
So yep that does sound right 1000kg with 200Nm sounds weak.
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

User avatar
Richo
Senior Member
Posts: 3248
Joined: Mon, 16 Jun 2008, 00:19
Real Name: Richard
Location: Perth, WA

Re: Which Motor?

Post by Richo » Mon, 13 Aug 2018, 13:20

Was there a suggestion that this was supposed to be direct drive?
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

Mawson
Noobie
Posts: 4
Joined: Sat, 17 Feb 2018, 06:31
Real Name: Phil Huband

Re: Which Motor?

Post by Mawson » Tue, 14 Aug 2018, 06:43

Thanks for your help guys.
It's difficult to get good information out of China. This motor and controller is only 1/3 the price of the HPEVS but it's not worth anything if it doesn't do the job.
I'll keep looking in the hope that something more suitable comes up. The HPEVS is not available in Perth but I'm sure there's one (or an equivalent) somewhere in Australia.
And yes, I'm keeping the original gearbox and assumed that it would run in 2nd or 3rd. It's very hilly here in Bridgetown and although the car is only going to be used locally I want to have highway speed capability just in case.

User avatar
Richo
Senior Member
Posts: 3248
Joined: Mon, 16 Jun 2008, 00:19
Real Name: Richard
Location: Perth, WA

Re: Which Motor?

Post by Richo » Tue, 14 Aug 2018, 12:50

I Like Bridgetown!
So a motor that has 34kW@5,500RPM and 74Nm@3,500RPM.
Rod is just round the corner - can't you get a Motenergy system off him to do that?

Is the diff really 4.37:1?
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

Mawson
Noobie
Posts: 4
Joined: Sat, 17 Feb 2018, 06:31
Real Name: Phil Huband

Re: Which Motor?

Post by Mawson » Wed, 15 Aug 2018, 09:24

Yes, I contacted him. Their motor is too small for a car in a hilly area.
I'm still looking, so any suggestions for alternatives are much appreciated

Post Reply