Invacare gb motors

[RoyOnWheels]

Denis are the motors all the same or odd pairs?

gbmotors.jpg

Hi, are there any more pictures showing inside the motors? Specifically the brake mechanism.

[woodygb]

http://endless-sphere.com/forums/viewto ... t=invacare

[shirley_hkg]

Here you see more pics of the new GB motor .

viewtopic.php?f=2&t=879&p=10108#p10108

[shirley_hkg]

Denis are the motors all the same or odd pairs?

The attachment gbmotors.jpg is no longer available

Hi, are there any more pictures showing inside the motors? Specifically the brake mechanism.

For the old version motor, here you are almost there. Cut the wire of the micro-switch to allow you lifting the brake drum completely.

Set it in free wheel position first. Just pull by the free-wheel linkage rod, and you will take the entire brake drum out. Once it is out, you will be surprised how simple it is. No gimmicks.

[shirley_hkg]

FOUND SOME PICS OF THE BRAKE ASSEMBLY :

[shirley_hkg]

We spent our 4 day Easter holiday for good foods.

http://bbs.4limb.org/viewthread.php?tid ... ra=&page=3

Have to get to town first , for 35 km from the nearest railway station.



This is how we ride : https://www.youtube.com/watch?v=TT53Cl1 ... e=youtu.be , and why we love our GB chairs , lithium powered.

[Burgerman]

Why the white masks? Traffic fumes?

You need more speed

What Ah are your lithium batteries? I seem to remember you are using Pouch type soft case used A123 cells and lots of them? Does the fire risk with that type of call getting punctured worry you?

[rustyjames]

Good job on that video, I like the music too!

[shirley_hkg]

Why the white masks? Traffic fumes?

You need more speed

?

YES, it is dust and fumes all the way.

Higher speed is perfect. With all these extra load and contineously running for 3 hrs, the temp of the motors is the same as that of the warm tyres.

That's why we stick to it. That will be great if someone can put Roboteq dual channel gearless controller to them. One has tested these motors can run over 400 rpm ; that's over 25 kph. WOW.

[Burgerman]

Well using my joystick/wiring/battery (13s) or even 14s, the motor wiring same as will is using, and the script we are using and a brushless Roboteq is OK now. You would get the same or even better range, from the same battery and almost double speed. And 4x the power, stall torque right up to about half speed, etc. All win.

[Williamclark77]

[That's why we stick to it. That will be great if someone can put Roboteq dual channel gearless controller to them. One has tested these motors can run over 400 rpm ; that's over 25 kph. WOW. [/color][/size]

I actually have a set of these motors. The older 8 mph or whatever speed they are ones. Too bad they don't have hall sensors and there's not really a good way to install them or I would have tried. The Roboteq uses hall sensored motors to determine position. As my custom built chair is now while still in development, they are about equal or a bit weaker to these at low joystick inputs - starting and below 1 or 1.5 mph. Anything above that though and my Roboteq setup is MUCH more powerful. However, these at 14s and proper programming could be better. It has never been done as far as I know.

[shirley_hkg]

They do have sensor, new and old. There is a Seperate magnetic ring to return signal to control.

[Fulliautomatix]

We spent our 4 day Easter holiday for good foods.

http://bbs.4limb.org/viewthread.php?tid ... ra=&page=3

Have to get to town first , for 35 km from the nearest railway station.



This is how we ride : https://www.youtube.com/watch?v=TT53Cl1 ... e=youtu.be , and why we love our GB chairs , lithium powered.

Hi Shirley, what are the passenger trolleys please?

[Burgerman]

And which is you?

Are you all lithium powered? How far do you go?

[shirley_hkg]

My wife and I are the camera crew.

Yes. Three of us are pure lithium, and the other is lithium add_on.

Top speed 15 kph.

[shirley_hkg]

70Km carrying wife . If alone, 100km per charge is easily achieved , though haven't tried yet.

[rollingcowboy]

must be very good food for you to travel that far!

[Burgerman]

Sometimes the journey is the point, and the food the excuse!

[denis.b]

LIFEPO4

I thank all of you who helped me build the wheelchair.
I have been using it in the mountains for more than 7 years and it has always worked very well on very steep and safe roads thanks to the four bruschless motors with electric brake. With 8 LIFEPO4 lithium polymer batteries of 200AH and 26Volts average I have a huge range. At 10Km / h it consumes less than 10Ah traveling on a level I have a range of about 200Km.
I wanted to ask you if it is possible to reprogram the MKIV GB control unit to remove the speed limit which intervenes at about 12.5 km / h and decelerates the wheelchair until it stops.
Thank you

[Burgerman]

Not sure about the controller you have. The NEWER ones that I have here can I think.

Those are NOT lithium polymer batteries though. Those are to be avoided unless you like fireworks.

[RJ-Liithium]

The attachment lifepo4.jpg is no longer available

I thank all of you who helped me build the wheelchair.
I have been using it in the mountains for more than 7 years and it has always worked very well on very steep and safe roads thanks to the four bruschless motors with electric brake. With 8 LIFEPO4 lithium polymer batteries of 200AH and 26Volts average I have a huge range. At 10Km / h it consumes less than 10Ah traveling on a level I have a range of about 200Km.
I wanted to ask you if it is possible to reprogram the MKIV GB control unit to remove the speed limit which intervenes at about 12.5 km / h and decelerates the wheelchair until it stops.
Thank you

The batteries you use, the Polymer plastic cells are not good for larger working current, easily drum and swelling, for more stable and higher performance in discharge rate, you can consider Aluminum LiFePO4 Prismatic cells, in your case, you can use 8pcs in series to make 25.6V. hope it help!

3.2V Lifepo4 prismatic aluminum cell 10Ah to 271Ah perfectly for EV & Solar Energy Storage

[Burgerman]

Most of us dont use those. But, if you do not have adequate capacity, or C rate they all swell and bulge including the alloy ones. But we are using large capacity, so as to minimise the damage and cycle life reduction in our chairs. So we are quite far away from this being a problem as long as people are fitting plenty of Ah to replace the lead.

What WOULD be useful is a price including shipping to EU and US. And a list of cell prices.
At the moment the 176Ah cell is the best size as it allows 8 to fit in the space we have available on most chairs.

Although 16 of the 105Ah cells would be even better. http://www.dcmax.com.tw/LF105(3.2V105Ah).pdf if you can supply these.

[ex-Gooserider]

lifepo4.jpg

I thank all of you who helped me build the wheelchair.
I have been using it in the mountains for more than 7 years and it has always worked very well on very steep and safe roads thanks to the four bruschless motors with electric brake. With 8 LIFEPO4 lithium polymer batteries of 200AH and 26Volts average I have a huge range. At 10Km / h it consumes less than 10Ah traveling on a level I have a range of about 200Km.
I wanted to ask you if it is possible to reprogram the MKIV GB control unit to remove the speed limit which intervenes at about 12.5 km / h and decelerates the wheelchair until it stops.
Thank you

I have an H-frame w/ the MkIV / GB motor combo, and as far as I know, the only programming option available for the MkIV is the hand held unit, which gives very few options, and doesn't seem to have an option for that.... I haven't played with the chair in a long time as it is essentially my 'backup' chair and will only be using it if my current chair dies...

Are you sure you aren't hitting a thermal rollback problem where the controller is overheating and cutting power? (IIRC there is a temperature setting that can be increased....)

Since I don't need the long-range speed that Shirley does, I may end up converting the chair to brush motors w/ a Pilot+ controller...

ex-Gooserider

[denis.b]

I have been using my 4x4 wheelchair for about 9 years and it has always gone great.
Now I have a problem on the hall sensor circuit of the Gearless Brushless Motor TS1113090.
Every so often the sine wave no longer comes out of the green wire and the motor stops in error.
The circuit is simple but unfortunately the names of the components are no longer read.
Any of you have the circuit diagram or can you help me?
Thank you very much,
Denis

[stevelawiw]

Hi Denis
I've no diagrams, but here's a link to the datasheet for the chip on the pcb in your picture which Lenny found for me
http://ww1.microchip.com/downloads/en/DeviceDoc/24AA0-24LC01B-24FC01-Data-Sheet-20001711L.pdf

You have one Joystick driving two controllers? How on earth does that work!?
You've been using it for years so obviously very well.
So over these nine years have you ever burnt out a controller? Is this the first problem you've had with your modified GB system?
I have my own GB project
http://www.wheelchairdriver.com/board/viewtopic.php?f=2&t=5430
I have the GB motors working on the bench with the Roboteq HBL2360A using SIN/COS with my own sensors, not using the original board in your picture.
Can I see a picture of your 4x4 GB chair?

[denis.b]

The joystik command has been rebuilt. I can turn on with only front or 4x4 drive. The two control units simultaneously receive the data line from the joy, to enable 4x4 sending + 13V when the second control unit is switched on.

[foghornleghorn]

The joystik command has been rebuilt. I can turn on with only front or 4x4 drive. The two control units simultaneously receive the data line from the joy, to enable 4x4 sending + 13V when the second control unit is switched on.

Sounds complicated!

How long do tyres last?

[denis.b]

Foto

[denis.b]

The rear wheels have steering assisted by servomotor and rack. The control units have synchronized turns to follow the curve, so the tires last a long time.

[foghornleghorn]

I'd not seen the photos so didn't realise it is a Meyra with the rear steer. Had imagined something where all 4 wheels were scrubbing the ground at every turn and tyres would last about 5 minutes.