Totally off the wall idea.....

Steve390Gold

So for our electric carts, the limiting factor is a reduction in torque from the electric motor as rotor speeds increase despite having ample current to feed the motor.

This got me thinking (usually a dangerous situation...lol) to achieve higher speeds more quickly the drive ratio needs to change to lower the rotor speed to achieve more torque.

So in theory, what would happen if we took a gas powered cart, removed the ICE (internal combustion engine) but left the pulley drive system (essentially a CVT) and used the electric motor to input power into the pulley drive system?

This would keep the electric motor down in RPM whilst steadily decreasing the gear ratio to allow higher speeds....

Thoughts?

(Other than that Im going to die in a horrific wreck in a golf cart going way way too fast....lol)

BGW

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Gallachera89

This is something i have actually once thought about

Tigg-N-Taz

Would it work the same and less Fab work to put a gas rear in an electric cart?

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jethaulin

it has been done. here is the sight. the clutch system they used isnt made anymore.
https://rqriley.com/product/urba-electric/

Urba Electric’s main technology breakthrough was the Electromatic Drive Transmission, developed and patented by Darrell Hillman and Foster Salsbury of Salsbury CVT fame. This ingenious electronically controlled continuously variable transmission (CVT) let the motor run at a steady speed while the transmission’s shift-position provided control over the car’s speed from zero through 60 mph. The accelerator pedal was connected to a device that varied a low-voltage shift-position signal to the CVT. This caused the shift-position to track the degree of depression of the accelerator pedal. As the accelerator pedal was depressed, the CVT smoothly up-shifted causing the car to accelerate in unison. Meanwhile, the compound-wound dc motor ran at a constant speed – its most efficient speed. For regenerative braking, the driver simply let up on the accelerator pedal, causing the CVT to downshift to a lower ratio. Downshifting at cruising speeds forced the motor to spin faster, which reversed the direction of current flow and delivered a charge to the battery (due to counter emf) as it slowed the car. No traditional electronic speed control was necessary.

Steve390Gold

Most likely yes. I was literally just brainstorming....lol

That is awesome!!

Plum crazy motor's drag racing golf cart got me thinking about how they achieve a 110mph trap speed on the 1/4 mile...they have to use something to gear the motor up as the speeds increase.

Fastest1

Plum Quick is running very high voltage and amperage IIRC


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NCPW

Yep, they have a video on YouTube of one of their 120V lithium carts and it's screaming fast.

Steve390Gold

Sobthey are using a 3phase motor designed for cars?