Hi folks. I’m busily designing a motorized walker (the kind old folks use) - essentially, a very wide electric board with handrails. The key thing being that it will operate at very low speeds (4mph max). My 96-yo dad has been jonesing to add power to his walker, so I’m trying to oblige.
I’ve worked out a design using a standard belt drive, with a very high gear reduction ratio - but, for all the obvious reasons, I’d much rather build around a dual hub motor configuration. The thing is, that implies the motors turning at roughly 400rpm at 4mph (if I did the math right). The Maytech hub motors are rated at 60KV so, that implies that I’ll be running between maybe 1.5v - 8v and pretty high currents.
Does anybody have any experience/data/power curves for how these things run at low revs, with different rider weights? I’ve seen these things accelerate from a standing stop - so they can obviously generate the necessary torque - but what low speed operation implies for power consumption, and for optimal battery specs, is beyond me.