juniper motor from ASI

General Discussion about electric bicycles.
Post Reply
goatman   100 MW

100 MW
Posts: 2992
Joined: Jun 23 2019 6:50pm
Location: Surrey, B.C.

juniper motor from ASI

Post by goatman » May 05 2021 5:03pm

anyone have experience with them?
https://www.acceleratedsystems.com/prod ... ric-motors
motor-jasper500_harness500.jpg
motor-jasper500_harness500.jpg (65.25 KiB) Viewed 300 times
looks perfect for a phaserunner, rated for 95 phase amps

User avatar
neptronix   100 GW

100 GW
Posts: 15654
Joined: Jun 15 2010 5:56pm
Location: Utah, USA
Contact:

Re: juniper motor from ASI

Post by neptronix » May 13 2021 11:06pm

No but i want one.
All those poles make it a torque monster. The very tight wound stator means you don't pay an efficiency penalty .
I would bet that the laminations are razor thin which is an improvement over everything else on the market.

It would probably rip in a 20 inch wheel... just add ferrofluid :shock:

I've sent an inquiry about the price.

Attached is the spec sheet.
Attachments
asi_juniper_motor_spec_sheet.pdf
(1.72 MiB) Downloaded 20 times
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Heavy duty Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

larsb   10 MW

10 MW
Posts: 2166
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: juniper motor from ASI

Post by larsb » May 14 2021 7:21am

Now that’s a nicely wound motor! Doesn’t get much better than that.
Looks to be 0.5mm laminations
B1B9E937-E83B-4ABC-AEBC-7B6C58493CEE.jpeg
B1B9E937-E83B-4ABC-AEBC-7B6C58493CEE.jpeg (68.18 KiB) Viewed 173 times

User avatar
The Toecutter   10 kW

10 kW
Posts: 967
Joined: Feb 08 2015 4:02pm

Re: juniper motor from ASI

Post by The Toecutter » May 14 2021 7:59am

I wonder if they have different windings available. The one in the spec sheet would reach ~36 mph @ 48V with a 26" wheel, ~28 mph with a 20" wheel. This is good for a street legal setup, but if one wants to go faster, they'll need to run a higher voltage pack. If one could get away with running 96V, it would be ideal for a velomobile, and probably make 3-5 kW peak power.
Custom electric velomobile, 1500W: viewtopic.php?f=6&t=110298

User avatar
neptronix   100 GW

100 GW
Posts: 15654
Joined: Jun 15 2010 5:56pm
Location: Utah, USA
Contact:

Re: juniper motor from ASI

Post by neptronix » May 14 2021 9:45am

If they're achieving such high efficiency from 0.5mm lams, i'm legitimately stunned.
Those laminations look finer than that to my eye, but the caliper doesn't lie.

I'll call them today.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Heavy duty Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

User avatar
neptronix   100 GW

100 GW
Posts: 15654
Joined: Jun 15 2010 5:56pm
Location: Utah, USA
Contact:

Re: juniper motor from ASI

Post by neptronix » May 14 2021 12:39pm

Okay. Talked to an engineer over there.

Couldn't get a stator lamination spec out of them, sadly.
Stated peak efficiency figure of 92% seems unclear; the motor graph shows peaking at 85% efficiency or so.
85% efficiency would mean larsb's thought of 0.5mm lams is true.

The high pole count means low end torque will be consistently impressive and i get the impression this is a motor designed to squeeze the most power out of a ~500w limitation. The weight is exceptionally low for a DD of this size, so there's some good materials choices or design choices that aren't apparent from the pictures.

I think it could be a good motor in some use cases, but doesn't strike me as an exceptional motor.

I suggested some design changes, but it seems that production of the motor is halted for the time being, so who knows what lies in the future for ASI's hub motors.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Heavy duty Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

Voltron   1 GW

1 GW
Posts: 3194
Joined: May 02 2013 4:53pm
Location: Santa Barbara CA

Re: juniper motor from ASI

Post by Voltron » May 14 2021 1:18pm

It actually looks quite a bit like later gen Stromer motors, that had a similar circular plug with the flip out metal pull handle, and four bolt brake rotor... Not an easy replacement item to find btw, I think it's a Magura thing?

Post Reply