I'm also working on converting a gas powered chipper to electric power (likely powered via a NEMA 14-50 outlet).
This is mostly a paper design / BOM at this point, but I'm really tired of the noisy/smelly/messy gasoline engine in this thing. This device uses a Viper 212CC gasoline motor. According to the spec-sheet, this motor has a 1" output shaft with a 1/4" key, which is 3.5" long. The motor has both face mounts and base mounts, which are both used in this particular piece of equipment. The biggest problem I've been finding is getting a shaft which matches the motor. The closest motor I can find on Grainger's motor selector is one with a 7/8" keyed shaft that's 4.5" long. I suppose that I could make this work, if I cut down the shaft and get an adapter sleeve kit. But the project would be lower-risk if I could find an electric motor with exactly the right kind of output shaft. Does anyone have a great way to to search for electric motors by the output shaft? -Luke P.S. This isn't my first go-around looking for the perfect part which matches in all physical and electrical dimensions for lawn equipment. I upgraded my Black & Decker electric lawn mower from SLAs to a lithium-ion e-bike battery a couple of years ago, and I'm very happy with how that project turned out. That was a less ambitious project, but the critical part I selected had just as many physical and electrical dimensions to match. Also, choosing exactly the right part made every other aspect of the project easier. On Tue, Oct 25, 2022 at 10:22 PM Lee Hart via EV <ev@lists.evdl.org> wrote: > Tom Hudson via EV wrote: > > I just found the information sheet from Simplicity on this machine and > > the spec'd RPM for that motor is is 3700 +/- 50. > > > > Sure would be a fun winter project. Sizing the motor is the big question > > -- I see various conversions from gas HP to electric HP online, and I > > want to be sure to provide enough power to match the gas engine's output. > > Hi Tom, > > I've converted a few pieces of yard equipment from IC to EV. Each case > is unique, but here are a few guidelines. > > ICE's are generally rated by peak HP, while electric motors are usually > rated by continuous HP, which is lower. Depending on the type of > electric motor, it can deliver anywhere from 2x to 10x its rated HP. > When the load is intermittent, this means you can use a much smaller > electric motor. > > I helped a friend convert his Wheel Horse garden tractor with an 8 HP > Kohler ICE to EV. We used a 1.5 HP 24vdc series motor. It actually had > *more* pulling power than the ICE, and no problem providing the average > amount of power needed for lawn mowing. We used two 12v group 27 deep > cycle lead-acid batteries. The controller was very simple; three > contactors, arranged to provide 12v with a series resistor (starting), > 12v direct (slow), and 24v (fast). > > Another friend converted a log splitter from ICE to electric. We used a > 120vac induction PSC (Permanent Split Capacitor) motor from an air > compressor, and he simply plugged it in with an extension cord. The > motor ran a hydraulic pump, which had a small accumulator to handle the > high peak power needed to start splitting a big log. We also had a 15A > circuit breaker on the splitter as its on/off switch, as well as so an > overload would trip the local breaker rather than requiring a trip into > the basement to reset the main 20A breaker. > > I converted a standard lawn mower with a 3 HP ICE into an electric > mower. I used a surplus 110vdc PM treadmill motor. I initially powered > it with an extension cord and bridge rectifier. Later, I replaced the > cord with a set of 60 surplus Gates 2v 2.5ah gel cells. Each cell was > about the size of a D-cell battery. The controller was nothing but an > on-off switch. I initially tried using a standard switch, but it failed > almost immediately from trying to switch DC. So I used the switch to > power a contactor, which in turn switches the motor. > > I converted a classic ICE minibike to EV. It used a 2.5 HP 36v series DC > golf cart motor, and a small (Petrosonics brand) PWM motor controller. > The golf cart motor was actually too powerful; it was too easy to spin > the tire and lose control. A much smaller motor would have been better. > > Lee > > -- > "#3 pencils and quadrille pads." -- Seymour Cray, when asked > what CAD tools he used to design the Cray I supercomputer > -- > Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com > > -- > This email has been checked for viruses by Avast antivirus software. > www.avast.com > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20221104/6fa98992/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
