Exiting New Things

[Deleted member 4366]

This arrived today. It could be the most exiting thing we've seen on the forum, or it could turn out to be a damp squib, or anything in between. I'm busy now, but I'll give more info later, and hopefully a test at the Weekend:

 

[patpatbut]

Any details about this setup? I am sure I have seen this motor around here before

Pat

 

[Geebee]

I am glad some one has grab one to test, looking foward to the results

 

[trex]

exiting already?

 

[Arbol]

Can anybody explain some of the details of this configuration? I am excited already

 

[trex]

the xiongda XD (strictly legal, not like badged BPMs) has two internal gears, the higher ratio (8) for climbing hills, the lower ratio (4) for flat roads. Maximum power output is about 500W.Very effective at climbing 10% hills and ideal for light assist.
A rocker switch lets you select low or high gear, or automatic, the controller then decides when.
the supplied controller is rather conservative, rated 15A.
I would like to see it tested with a 20A or 25A sensored controller.

 

[shemozzle999]

I hope the testing goes well d8veh, could be the equivalent mid motor/hub motor answer for the future EU 250W motor solution.

Itching to see the internal workings and if it will reveal the secrets of how they have achieved this

 

[mike killay]

Really looking forward to this, but the photo does not show if derailleur gears can be fitted.

 

[Artstu]

could be the equivalent mid motor/hub motor answer for the future EU 250W motor solution.

A mid motor doesn't doesn't need two gears does it ?

 

[flecc]

A mid motor doesn't doesn't need two gears does it ?

No, but it's got the use of all the bike gears. That's not ideal though, sometimes compromising either the rider or motor efficiency.

A legal motor only needs two gears to adequately cover the range of speeds with enough power for all purposes, but riders need far more gears for efficiency in very variable terrain.

If successful, this two speed hub is an optimal solution, a concept I was promoting for e-bikes years ago.

 

[trex]

I hope the testing goes well d8veh, could be the equivalent mid motor/hub motor answer for the future EU 250W motor solution.

Itching to see the internal workings and if it will reveal the secrets of how they have achieved this

I thought you already have worked this out in one of your previous posts, by switching the rotational direction of the motor.

Still, none of the motor listed on ebike.ca simulator can go up 10% hill at 15mph.
If xiongda is willing to supply 20A controller with their XD motor then it should be the first to do this.

 

[patpatbut]

I wish it works well on you Dave.

I am quite surprised they do not have a CST one....

Pat

 

[hoppy]

[quote="trex, post: 212134, member: 5652"
Still, none of the motor listed on ebike.ca simulator can go up 10% hill at 15mph.
If xiongda is willing to supply 20A controller with their XD motor then it should be the first to do this.[/quote]How much power is needed for that?

 

[trex]

100kgs, 10% hill, 25.5km per hour (15mph) requires 880W at the wheels.
The input power (required of the battery) is = 880W / divided by the yield
If you run the motor at 80% efficiency: 1,100W or 40A @ 37V
That XD motor may do it.

 

[KirstinS]

Sorry to raise such a question when you are pushing the boundaries of pedelec tech

.,,,,,,but may I ask how much ?

 

[hoppy]

100kgs, 10% hill, 25.5km per hour (15mph) requires 880W at the wheels.
The input power (required of the battery) is = 880W / divided by the yield
If you run the motor at 80% efficiency: 1,100W or 40A @ 37V
That XD motor may do it.

40A with 20A controller?

 

[trex]

yes, that seems quite impossible but I reckon d8veh has ways of pushing motors to their limits
The supplied controller has only 6 FETs, xiongda pushed it up to 500W output power, but I reckon with a KU123, it will go much farther. The question is, the KU123 can only moves the motor forward, the ratio could be 4 or 8. I hope it's going to be 8 then that XD motor will fly up ladders..
40A is the draw from the battery, power output needs to reach 880W to hit the 15mph on 10% gradient.
If I remember correctly, I was told last July(?) that the supplied KT controller will work at 48V.

 

[hoppy]

yes, that seems quite impossible but I reckon d8veh has ways of pushing motors to their limits
The supplied controller has only 6 FETs, xiongda pushed it up to 500W output power, but I reckon with a KU123, it will go much farther. The question is, the KU123 can only moves the motor forward, the ratio could be 4 or 8. I hope it's going to be 8 then that XD motor will fly up ladders..
40A is the draw from the battery, power output needs to reach 880W to hit the 15mph on 10% gradient.
If I remember correctly, I was told last July(?) that the supplied KT controller will work at 48V.

Interesting! Do we know the rpm of that motor?15mph up 10% is the holy grail of legal ebikes!

 

[trex]

there is a motor test report on this web page:
http://xiongdamotor.en.alibaba.com/custom_page_1/New_Double_speed_Motor.html

test 59 shows the best you can get with the 15A controller.
ebike.ca shows about 17km per hour on 10% and 100kgs.
The Ezee motor gives 15km/h under the same conditions.

 

[shemozzle999]

Sorry to raise such a question when you are pushing the boundaries of pedelec tech

.,,,,,,but may I ask how much ?

from previous thread:

http://pedelecs.co.uk/forum/threads/dual-speed-motor.16634/#post-204749

alibaba link:

http://xiongdamotor.en.alibaba.com/productgrouplist-220560510/NEW_Double_speed_Motor.html