I would like to install an ammeter with a shunt in the motor cicuit on my electric bike to tell me when I'm using too much current, and will burn out the controller. This sounded like a great idea when I bought it, but now I have some questions. I want to know if the meter will still give me a good reading when there are less than 24 volts running through it (my bike runs on 24 volts), and is it a good idea at all? My bike is not finished yet, so my options are still open.
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Two words: Cycle Analyst
It's a zillion times excellent. I've got several of them, they're wonderful. At least one of the stores in the vendor directory (http://visforvoltage.org/vendors) carries it.
- David Herron, The Long Tail Pipe, davidherron.com, 7gen.com, What is Reiki
REIKIMAM is on it & correct!!
Cyclone 650 watt 24V trike
Thank oyu for your advice, it is very helpful!
Great idea using an ammeter in the motor circuit to save motor. Of course it is
better to use two shunts and a dual needle meter and see a thing called current
magnification while driving. It is something to see battery amps nearly low and
motor amps high and same battery pack voltage. All my scooters have amp meters
in them and it does some good on the Chinese scooters keeping battery current
down to increase range. As far as motor current goes it uses Variable Frequency
Drives so it acts differently. On my XM-3000 it goes maybe 5 miles more if
current is less than 50 amperes. I got a color coded meter with out numbers to
monitor charge current too. I charge in an hour or so at 15 amps.
Of course like any new play toy, you got to watch your driving and not gauges.
Use a dual shunt system and see difference in range. If you want to you can use two meters and two shunts but on a bike room is not there for doing two meters. Shunts can be hid in side panels but meter need to be seen in order for them to do any good.