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Post by ThomasTPFL on Jul 27, 2018 14:22:07 GMT -5
assuming I actually felt like going through the hassle......
some riding lawnmowers have an electric pto clutch....
I kind of like the idea of a push button or rpm trigger controlled clutch...
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Post by jackrides on Jul 27, 2018 15:01:15 GMT -5
Electric pto uses an electromagnet. Probably draws a lot of juice.
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Post by gsx600racer on Aug 4, 2018 16:56:19 GMT -5
Electric pto uses an electromagnet. Probably draws a lot of juice. Ditto. Mowers that use electric clutches have higher amp charging systems. I doubt a scooters charging system could keep up. |
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Post by ThaiGyro on Aug 6, 2018 2:27:05 GMT -5
This is an interesting question... My first thought is that it is do-able. Complicated, but surely can be done. They do not require a higher charging system really. An electro-magnetic clutch creates its own power, thus the complication. My knowledge is limited, but a few notes and issues from my experience in the manufacturing world: *12 volt is not uncommon *Most 12 V work with a specific ohm setting...1- 3 ohm signal? Not sure. *They generate (mower clutches) 60 to 70 watts of power *They can be right hand or left hand drive *they come with a safety brake *Can be fixed torque or variable *Many sizes *Heavy Your charging system likely is OK. I don't recall the actual "draw" in amps, but it would not be high. That said, the brake would have to go away. Not needed. The issue I have with installation is how would you control it? using one like on a electric scooter would work with the throttle controller...design for variable operations. Any other unit would be POWER ON! So using a mower clutch is not good. YOu really need specific components for a scooter, atv or golf cart. Variable drive with all the right pieces and size. I am guessing more cost than a good CVT set. The electric ATV and scooters available from china have direct battery power...
Is your desire to build a hybrid? I think that would be cool to do! Yamaha and Honda are introducing their Thailand hybrid scooters soon. The control components would be what you need.
I understand Honda is doing a 125cc engine powering an electromag driver...whilst Yamaha is nearly doing the opposite with drive. A Filano 125 base with lithium batteries for low end, and power assisted like a Toyota, when needed. The Honda price is near 120THb ($3600), while Yamaha comes in at 55,000THb. (under $1700) Both companies working out deals with Thai government as this prints.
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Post by snaker on Aug 6, 2018 11:25:35 GMT -5
Riding lawnmower engines that power electric PTO's usually do get a higher output magneto.
It's important to be on the same page as to what the clutch actually is on a GY6 type CVT. Some folks confuse it with the whole driven pulley assembly. It is simply the 3 small springs, arms and the bell. It could be placed anywhere along the drivetrain. It is piggybacked onto the pulley because that is a great place for it.
You would be hard pressed to find a better design then that centrifugal clutch. Its compact, cheap, sturdy enough to handle that kind of horsepower, doesn't generate excessive amounts of heat and is reasonably adjustable.
Most importantly, is has favorable dampening characteristics (intentional slippage)that are necessary for a smooth takeoff launch. I'm not sure what sort of driven pulley RPM we're talking about at engagement on the average CVT. For example say the pulley is spinning at 1000 RPM. The clutch has to couple 0 to 1000 RPM smoothly and yet not slip excessively. The wearable pads come into play here whereas PTO clutch's typically don't have any sort of slippage consumable .
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Post by ThomasTPFL on Aug 8, 2018 16:09:15 GMT -5
I think for what I would like a more traditional motorcycle plate style clutch would probably work better.
Any small bikes anyone can think of that use a dry clutch?
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