Hi Ken, I am not sure how a hall-effect throttle works other than that it uses magnetism instead of a resistance trace. I believe that the throttle itself uses an AC voltage in a coil that is affected by a metal plunger attached to the throttle pedal, but I am not sure and it does not matter if the output from the hall effect throttle gets converted to a standard 0-5V throttle control voltage somewhere, then it is easy to take the pulses from the hall sensor on the mower axle and turn those into a control voltage also to automatically maintain RPM (rev up the motor if the hall pulses indicate that it is slowing down) this may need a simple inverting opamp to get the correct feedback, once you have the correct control signals.
Hope this helps, Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.com Private: http://www.cvandewater.info Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 -----Original Message----- From: ken [mailto:k...@peakfoto.com] Sent: Sat 4/25/2015 10:30 AM To: Cor van de Water; Electric Vehicle Discussion List Subject: Re: [EVDL] AC motors for mowers > If you are interested in the 36V DC motor, it even has a Hall effect > sensor on the axle that sits on top of the motor, to maintain RPM under > varying load, in case you'd like to add this to your controller (I think > that simply integrating the pulse output over time to get a DC voltage > representative of the speed and combining that with any throttle input to > the motor controller will do the trick. I believe Worx calls this > "intellicut" I am working on using a controller to slow down the motor for power savings and noise for lighter grass. how complicated is to ad this to my existing controller that has a hall effect throlte? I would be nice to have it maintian constate speed . I the a cheap way to do this with out using a Bike controller and an add on. could I by the board from them or ??? I built a box to put my headway cells in with bms, but the speed control would be nice also. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
