Thanks for the possible explation. I gues for know I'll use the bike controller. I found out 1 thing that this one has a low freg some thing in it and it makes my motors BUZ hard at low speeds.
On Sat, April 25, 2015 7:20 pm, Cor van de Water via EV wrote: > 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: [email protected] 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:[email protected]] > 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) > > > _______________________________________________ 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)
