As I am on my quest to understand how the brushless motor systems work, I see that understanding what the Hall Effect is and how it is applied in controlling and running an electric motor is one of the most important things to know about brushless electric motor bicycles.
I found this video ( http://www.youtube.com/watch?v=9BFdGtvo9JE
) which talks about 3 different types of Hall effect sensors. the "switch"(tuns on when particular magnetic pole is near it and off when the magnetic pole is moved away from sensor), the "latch"(turns on when certain magnetic pole is near it and stays on until the opposite magnetic pole is near it), and the "ratio metric"(varies out put voltage depending on strength of magnetic field near it) Hall Effect sensors. I am thinking that the typical variable twist grip or thumb lever throttles are using a "ratio metric" which causes a variation inf voltage going through the circuit, based on the strength of the magnetic field of a magnet placed insid the throttle, which will vary depending on what position the twist grip or thumb throttle is at. Is this correct??
I also love this tutorial on the 3 different types of hall effect sensors:http://www.youtube.com/watch?v=EHB1m9UMi0s
I am supposing that the "ratio metric" hall sensor is essentially a variable resister which changes it's resistance depending on the strength of magnetic field near it. And it requires being fed an electric current to operate, which is grounding in the center prong??
I am wondering which type of hall effect sensors are inside the brushless motors? I am suspect that it is the switch type, which indicates either "on" or "off" state. Although, I am wondering if there may be some advantages to using a "ratio metric" hall effect sensors inside the brushless motors.