The accelerator handle on the Dualtron Thunder Electric Scooter is hypersensitive at startup and at low speeds.
In other words, very small displacements of the accelerator lever cause jerks and sudden accelerations when moving from standstill position and in all other situations which require low speed control. Riding a scooter on a sidewalk among people, mastering bends, steep slopes, and general movement on cramped space requires precise scooter control at low speeds.
The Dualtron Thunder is a very powerful scooter and has this problem pronounced.
On my scooter, I solved this problem by adding an electronic mapper inside the EYE controller itself.
The principle of operation is simple. I cut the connection between the throttle hall sensor and the rest of the EYE controller and inserted a mapper there, which takes the analog voltage value of the hall sensor, calculates another, more appropriate value and passes it to the EXE controller processor.
The diagram below shows the principle of operation. The curves are not real and for the sake of clarity they are drawn cartoonically (over-emphasized), but the point of the diagram is to get an idea of what the device is doing.
After a bit of experimentation, I got a mapping curve that I'm very happy with, and I can tell that the negative jerks of the scooter's hold are completely gone.
For me, driving Dualtron Thunder has now become a real pleasure. Complete, precise control of the scooter at low speeds, sidewalk driving, turning bends, movements now go smoothly and quickly, and when the power is needed I pull the lever a little more and the full potential of the scooter comes soon to the point!
The whole idea of making this mapper was to stretch out the first phase of the accelerator action, which is factory set up too aggressively.
And when the lever is pulled more, acceleration increases lightly, which is desirable at higher speeds, but not when starting.
A few figures of mapper during assembly:
In other words, very small displacements of the accelerator lever cause jerks and sudden accelerations when moving from standstill position and in all other situations which require low speed control. Riding a scooter on a sidewalk among people, mastering bends, steep slopes, and general movement on cramped space requires precise scooter control at low speeds.
Figure 1. Dualtron Thunder EYE contrller with accelerator
The Dualtron Thunder is a very powerful scooter and has this problem pronounced.
On my scooter, I solved this problem by adding an electronic mapper inside the EYE controller itself.
The principle of operation is simple. I cut the connection between the throttle hall sensor and the rest of the EYE controller and inserted a mapper there, which takes the analog voltage value of the hall sensor, calculates another, more appropriate value and passes it to the EXE controller processor.
Figure 2. Mapper installed underneath EYE controller
The diagram below shows the principle of operation. The curves are not real and for the sake of clarity they are drawn cartoonically (over-emphasized), but the point of the diagram is to get an idea of what the device is doing.
Figure 3. Principle of operation
After a bit of experimentation, I got a mapping curve that I'm very happy with, and I can tell that the negative jerks of the scooter's hold are completely gone.
For me, driving Dualtron Thunder has now become a real pleasure. Complete, precise control of the scooter at low speeds, sidewalk driving, turning bends, movements now go smoothly and quickly, and when the power is needed I pull the lever a little more and the full potential of the scooter comes soon to the point!
The whole idea of making this mapper was to stretch out the first phase of the accelerator action, which is factory set up too aggressively.
And when the lever is pulled more, acceleration increases lightly, which is desirable at higher speeds, but not when starting.
A few figures of mapper during assembly:
so, I expect the answer is yes, but it simply remaps the integers of the throttle position sensor data and sends that instead yes?
ReplyDeleteno, not like that...
DeleteHello, this is a very cool project :) I own multiple Minimotors scooters, can you help me with some details? https://www.facebook.com/zadamone
DeleteSoon there will be finished product. I will publish details here. So stay tuned. Thanks!
DeleteAny news on this project?
DeleteCurrently working on test device to speed up production. Not to test each and every device manually.
DeleteIs it possible to buy somewhere?
ReplyDeleteOf course. Please send email to filip.bonacic@gmail.com
Delete