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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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09-06-2016, 04:03 AM | #1 |
Getting Wild
Join Date: Oct 2015
Location: MN
Posts: 76
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Speed magnet
Looking for beta tester to test in carts that can't use high speed magnet.
Does RXV use a standard tach connection? How do they limit speed if not from tach? Are they just keeping field current high? A MM "MMLIMIT" in beta testing sends stock pulses to controller. Good for cars with speedometer, like Gems. Speedometer is correct to programmed speed. Deposit and return required. |
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09-06-2016, 06:48 AM | #2 | |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: Speed magnet
Quote:
Bob |
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09-06-2016, 09:15 AM | #3 |
Getting Wild
Join Date: Oct 2015
Location: MN
Posts: 76
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Re: Speed magnet
Thank you, looks a lot like sensors used in forklift and other industrial equipment.
Short of buying a cart, won't be going far on that one. |
09-06-2016, 09:59 AM | #4 | |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: Speed magnet
Quote:
Bob |
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09-06-2016, 01:30 PM | #5 |
Gone Wild
Join Date: Apr 2015
Location: Pennsylvania
Posts: 378
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Re: Speed magnet
The RXV uses a 64count AB encoder. I read something of an experiment someone tried a while back where they machined out every other tooth of the encoder gear (effectively making it a 32count)
I believe their result was a non-running cart. AC systems are picky about their position encoders and modifying them typically ends poorly. |
09-06-2016, 02:15 PM | #6 | |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Speed magnet
Quote:
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09-06-2016, 02:23 PM | #7 |
Gone Wild
Join Date: Apr 2015
Location: Pennsylvania
Posts: 378
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Re: Speed magnet
Must be some check of the pulses vs the drive current frequency, but I really don't know enough about the finer points of ac motor drives to say for sure...or maybe the spacing of the sensors, the inputs should be a particular degree off...so I guess if you shave off every other tooth you would also need to move one of the sensor channels to compensate.
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09-06-2016, 05:04 PM | #8 | |
Getting Wild
Join Date: Oct 2015
Location: MN
Posts: 76
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Re: Speed magnet
Quote:
Actually I was wondering if electronic manipulation of encoder pulses would allow more speed. In lieu of buying a cart, maybe just an encoder assembly would be enough. It must use 4 wires then. B+, B-, A, and B. Think I can work with that. The mechanical method should work. Try it again, making a wheel with less teeth, but keeping duty cycle the same. Is duty cycle 50% stock? ie. tooth and space equal. Also looking for someone with a sepex cart that does not respond to 1/2 pulse magnet. See if a 7/8 or 3/4 pulse magnet works. |
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09-06-2016, 05:12 PM | #9 |
Getting Wild
Join Date: Oct 2015
Location: MN
Posts: 76
|
Re: Speed magnet
Is this the most common?
Early models use bearing encoder? |
09-06-2016, 05:54 PM | #10 |
Getting Wild
Join Date: Oct 2015
Location: MN
Posts: 76
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Re: Speed magnet
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