I use a Lynch designed flat DC motor which is available from agnimotors.com.
Originally purchased from Ebay as an ex "Robot Wars" fighting machine motor, it runs on 36v and I use ex equipment 95Ah lead acid batteries which last at least two seasons at a time. My "Stiga" twin blade mulching mower has around a half hour run time on good cells and is quieter and more powerful than the ICE it replaces. No ear defenders needed which was a main reason for replacing it and the motor is ideally designed for vertical shift installation. Cedric Lynch, the innovator of the motor (and a really nice bloke) has had a rocky time over the years with big business stealing his design so go to the web site and take a look. I vastly prefer AC motors for transport but these highly efficient compact DC motors are not to be ignored for this type of application. Russ -------------------------------------------- On Fri, 24/4/15, Cor van de Water via EV <[email protected]> wrote: Subject: Re: [EVDL] AC motors for mowers To: "Electric Vehicle Discussion List" <[email protected]> Date: Friday, 24 April, 2015, 21:23 I have a Worx 36V mower that has a failed controller, the (DC) motor is good and very powerful, I have tested it with a 24V 10A power supply and it hummed! But I am not needing a bladed mower since my yard is so small and uneven that I always end up using the weed whacker to mow the parts that need mowing. 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" You can pick it up locally in Silicon Valley or pay me shipping and I will be happy to see it go to good use instead of the mower sitting neglected in a corner of my terras. Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Lee Hart via EV Sent: Friday, April 24, 2015 12:00 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] AC motors for mowers ken via EV wrote: > Where do I find the AC motors that are used to run the mower blades > that are on the decks of the riding mowers like Recharge n Zeon hustler etc. > I looking for myabe 750, 1000 watt motors. Are you sure they're using an AC motor? Every electric mower I've seen used plain old brushed DC motors. Either it's running directly on the battery (like my ElecTrak, or Black & Decker push mower), or it's running off the AC line with a bridge rectifier (my Rally mower). > Also whats the differance between Dc brushless and Ac motor? Fundamentally, they're both AC motors. *All* motors are really AC motors! - A brushed DC motor uses brushes and a commutator to convert DC into AC for the actual motor. Brushed motors can either use magnets or wound field coils. - A "brushless DC" motor is just an AC motor with an electronic commutator ("inverter") to convert DC into AC for the motor. Most (but not all) brushless DC motor have permanent magnets. - An AC motor obviously just leaves off whatever device the others had to convert DC into AC, since AC is already available. Most (but not all) AC motors don't use magnets. > AC is 3 phase and Dc brushless has electronics on the motor that > changes it to AC? Not quite. AC motors can have any number of phases; single-phase, 2-phase, and 3-phase are the most common. The controller (for any type of motor) can either be attached to the motor, or in a separate box. -- If you can't explain it to a six year old, you don't understand it yourself. -- Albert Einstein -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com _______________________________________________ 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) _______________________________________________ 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)
