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Forum Index : EV's : need to add a safety limiter from controller to motor

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Quazee137

Guru

Joined: 07/08/2016
Location: United States
Posts: 603

Posted: 08:50am 15 Oct 2024

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My old controller about 10 to 12 years old stopped working. I got what was to be
an exact replacement. All wires was the same. Hookup was easy. Then did a few test
and all seemed good. So did a drive test and it when very bad. I was at 5MPH going
through the big gate started to back off throttle and went to 45MPH. Hit the speed
bump/dip and went airborne. Landed on my right side then E-Trike landed on me.

Well I have a few fractured ribs and clavicle. Yup lots of pain in many places.

So while I heal-up I'd like to make something to limit the power going to the
front 3 phrase motor.

The controller has limit wires set to 28MPH that failed to protect me.

My son said I should move the throttle to a pedal on the right and a 3 switch
cutoff pedal on the left.

Bike is an adult Schwinn trike with back and front facing cameras. "great for nite"
A MM170 with 4" display showing state of 48Volt LiFePO4. While I'm down looking to
change for a newer Pico with DVI and 10" screen with DVI, VGA, AV.

One last thing would be to stream the cameras to my android phone motion detected.

Looking for ideas here.

THANKS
Quazee137

Solarnewbie
Newbie

Joined: 30/10/2017
Location: United States
Posts: 12

Posted: 09:35am 01 Sep 2026

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The controllers I’ve used had inputs that tie to the brake levers front and rear so when brakes are applied it cuts off the power to the motor. A little rough if your on an incline at an intersection and still have the throttle on she will leap forward. Like riding the clutch on a hill without brakes. A big red stop switch would probably be good for us older folks that break easy. 🤔😂

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