Hey everyone! I was playing around with my e-scooter at the bike shop a few days ago and stumbled onto an oddity. My friend recorded it on video. I call it remote motor control.
Electric Power-Assist Steering (non-hydraulic)
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My thanks to Chad Johnson for the cinematography. The end is my favorite part 
The wiring is as the picture describes. The hall sensors of one motor connect to the controller. The phase wires of the other motor connect to that controller. with ginger throttle input from my hand, the controller will rotate the powered motor in accordance with the position of the sensored motor, which I rotate by hand. Thus the motors are synchronized.
The wiring is as the picture describes. The hall sensors of one motor connect to the controller. The phase wires of the other motor connect to that controller. with ginger throttle input from my hand, the controller will rotate the powered motor in accordance with the position of the sensored motor, which I rotate by hand. Thus the motors are synchronized.Attachments
The logical conclusion is that one could use two brushless motors to make an electric power steering system. For example, if we were to mount two motors to a shaft as shown, and use a torque sensor in place of the throttle and make adjustments to the signal it produces, when steering became more difficult the torque sensor would read this and signal the controller. The controller would then power the drive motor based on the rotation of the sensor motor, caused by the user steering. As long as one adjusted the power correctly, the drive motor's rotation wouldn't cause the controller to send more power to the drive motor. The torque sensor would need to be mounted in such a way that it doesn't produce signals from the drive motor's rotation.
Further more, if the system were real bullet proof one could have a car, such as a go-cart with four wheel steering! The rotation of the steering wheel would turn the sensor motor and cause the rear electric steering to mimic the movement, making the rear steering mechanism follow suit.
Further more, if the system were real bullet proof one could have a car, such as a go-cart with four wheel steering! The rotation of the steering wheel would turn the sensor motor and cause the rear electric steering to mimic the movement, making the rear steering mechanism follow suit.
Attachments
Of course the torque sensor would need to be able to rotate in both directions, or maybe two could be used at once, one for each direction?
The other thing is that this whole idea could be better replaced by a stepper motor. (I'm guessing).
And I'm not sure if the shaft diagram is accurate to a working model. My original drawing depicted having a hub motor in the steering wheel, and using either a hub motor or externally mounted brushless motor on the shaft.
The other thing is that this whole idea could be better replaced by a stepper motor. (I'm guessing).
And I'm not sure if the shaft diagram is accurate to a working model. My original drawing depicted having a hub motor in the steering wheel, and using either a hub motor or externally mounted brushless motor on the shaft.
