Hi

I have a question about Hall Sensor . If you can enlighten me i will be glad.

Firstly what is a "HAll Sensor". Why do i need it ? Do i need it ? and what will happen if i don't have it?

Also what is difference between Double and Single Hall Sensor ? For different motors do i need different sensors ?

As you can see i have no idea about it but have lot of questions :S

Thanx in advance.

Welcome to bikeforums borque_oneal In this case "Hall" is short for the "Hall-Effect" which was discovered by Edwin Hall in 1879. Hall sensors convert (i.e. trans-duce) a magnetic field level into an electrical signal. Hall sensors are, among other things, used to sense current, speed, and proximity. Certain bicycle hub motors use hall sensors to control the electric timing and power distribution within the motor. Older electric motor designs use brushes and commutators to do this, while some newer motors are of the (Hall) "sensorless" type. A search on "electric motor designs" will explain this further than I can.



Double Hall sensors can be of 2 types, iirc: one type uses two sensors that are designed to increase accuracy by "sensing twice" and then differentiating between the two signals, while the other type involves the use of two sensors for redundancy (i.e. if one fails, the other will still work). Both types are generally contained within a single component case or housing.



Needing, or not needing, a Hall sensor will depend on the type and make of the motor you have, or intend to use.

Thanks for your reply.

If you phrase it the right way, google has a lot of info such as this article
https://www.e-bikekit.com/ebike-kits/electric-hub-motor

Before www.ebikes.ca changed their website a bit, they had a explanations in quite
clear language of how different things worked.

Keep looking, keep learning, that is part of the fun!