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  1. H

    Jeetrike mountain handbike with Bafang BBS02 modified to Cycle Analyst V3

    Hi endless sphere forum, in case of anybody being interested in a Jeetrike mountain handbike with Bafang BBS02 modified to use Cycle Analyst V3 see the link below. Please note that this is a link to a german forum, but google translate will to the job to translate when needed ...
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    Replacing MOSFETS on a Grin C3620-NC Controller

    When running a motor sensorless on the bench without any load I used thin probe wires with alligator clips. Most probably the connection was not stable, so induction caused over voltage causing my Grin C3620-NC controller to die. In fact, one or two MOSFET were blown. So be warned to use crimped...
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    How to run Sunstar mid motors with Cycle Analyst V3

    In order to get a new handbike running properly with electric support - this means adjusting the motor behaviour to the lower human torque provided by arms instead of legs - there were a couple of things to be done. I wanted to have control over the motor, so a CA3 needed to be used instead the...
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    How to easily measure pulling force, torque motor efficiency

    For our next hand bike project (see https://endless-sphere.com/forums/viewtopic.php?f=2&t=80217&sid=676831c55bbbb422a3042f624c01e0eb) we were wondering about the torque and pulling force, our current handbike can supply. So I ordered a (pretty cheap) digital baggage scale: The idea was to...
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    upgrade a Stricker handbike (wheelchair tricycle) off road

    Yesterday we finished the electrical work: Adding the non insulating 40V to 24V converter and the isolating 24V to 15V converter to supply the temperature gauge. Works pretty well :)
  6. H

    upgrade a Stricker handbike (wheelchair tricycle) off road

    We made intensive tests and long drives yet and we are super happy with the result. More torque and even longer battery life. A few pictures will show the results:
  7. H

    upgrade a Stricker handbike (wheelchair tricycle) off road

    That's quite impressive - do you do all that mechanical stuff yourselve? Hawaii must be a cool place to climb initially and then having fun back down again :wink:
  8. H

    upgrade a Stricker handbike (wheelchair tricycle) off road

    And the result? Great!!! :D Much more power and torque. Even significantly bigger range (seems like the motor has a way better efficiency). Now we know about the temperature. Light use is between 30 and 40°C. Very steep and long inclines (almost slipping front wheel on asphalt) or inclining...
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    upgrade a Stricker handbike (wheelchair tricycle) off road

    Talking about the mechanical stuff: When comparing both motors, the newer one is significantly bigger and heavier, which was both expected: OK, starting the replacement. First surprise, the axle diameter is significantly bigger - this luckily turned out not to be a problem, since both axles...
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    upgrade a Stricker handbike (wheelchair tricycle) off road

    Electrical problems to solve: There were not too many :) Electrically, the halls worked well. Commutation was not a problem as well. We had to change the wires colors between motor and the controller and between halls and controller - initially when connecting colors 1:1 the motor did not...
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    upgrade a Stricker handbike (wheelchair tricycle) off road

    So, what to do to solve our thermal problems? Lessions learned: We needed a stronger motor. Not primarily because of more power or torque, but to take more thermal power before burning isolation off the wires. And we needed a temperatur surveillance to make sure not to destroy the next motor...
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    upgrade a Stricker handbike (wheelchair tricycle) off road

    Hi there, I just want to tell everybody interested about upgrading an electically supported Stricker handbike (wheelchair tricycle) for way better off road capabilities, including changing the motor to solve thermal problems. This included also solving a good amount of mechanical problems. The...
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