Project Logs

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• Charger

  Mark Kelsall • 05/26/2024 at 12:10 • 0 comments

  The old charger was a 25 volt 50 amp unit (!! 50 amps !!), but I am going to use an external 24 volt 40 amp unit for the LFP battery. There will be a charging port under the seat, not decided what plug / socket to use yet. Maybe a waterproof design?

  There is a possibility of modifying the old charger to put out the right voltage, and having a cutoff mechanism to stop charging. I'm assuming that it's a CV / CC unit.

• Field winding cables

  Mark Kelsall • 05/26/2024 at 12:05 • 0 comments

  The motor in this scooter is a separate field excited DC brushed motor. The old motor ECU only had the 1 field connection, I've rewired the motor to bring both field connections out to the Curtis Sepex controller. Am yet to terminate the field cables with a high current spade connector, that's the next job.

• Stripped body panels off

  Mark Kelsall • 05/26/2024 at 08:52 • 0 comments

  As you can see, the scooter has had its bodywork taken off, this is currently stored close by, and will be restored by my two friends. Being more of a 'get it working' restoration rather than a 'better than factory restoration'.

• Probing the wires.

  Mark Kelsall • 05/26/2024 at 08:49 • 0 comments

  In removing the old motor ECU, I've had to cut the old plug for ECU off. I've been working out what wires go where and labelling them.

  The 12v power for the controls (motor start, emergency motor cutoff / horn / lights switch) all used to be produced from the motor ECU. So I have designed a new power system using the original wiring plus a 12v Lipo battery.

  Also have designed a circuit for controlling the motor and ECU, which will be posted after I've tried it out. I am avoiding using any microprocessors in this bike I'm no programmer, and am doing everything with relay logic so it will be easy to repair and maintain without having a Github!

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