douglashart
100 W
im a noob so.... ive got a mongoose beast in which I intend to run 2 motors. im thinking about 500 watts each (cute motors).Will I need to run 2 controllers or can I run the 2 in parallel off 1 heavy duty unit? any suggestions?
2 motors 2 controllers ?
- Thread starter douglashart
- Start date
The brushless motors each need a controller. You just need to wire the throttle signal to both controllers.... for a basic 2WD setup. An intelligent system would take the throttle signal and modify it to ensure both motors are balanced in their performance (torque and speed).
douglashart
100 W
total noob here . Ive got a mongoose beast that I intend to put motors front and rear. Will I need to run two controllers or can I just run both in parallel off a single larger controller? thnx for any input. im learning
Gregory
100 kW
Hi,
With two brushless motors (three fat phase wires) you will need two controllers. They can share the throttle. I think there is a thread or two by Kingfish? that may help.
Older brushed motors (two wires) could be wired series or parallel off one controller.
With two brushless motors (three fat phase wires) you will need two controllers. They can share the throttle. I think there is a thread or two by Kingfish? that may help.
Older brushed motors (two wires) could be wired series or parallel off one controller.
I think the ES wiki has a few links to various good 2WD threads that will help you set this up, and answer your questions about how it can work.
An easy and very effective approach is to use two identical controllers/motors/wheels/tires so you can drive both controllers with the same throttle voltage. You can just treat the system as two equal motors geared together to two identical wheels - since they are essentially mechanically linked, there is no complex control intelligence required since they are intrinsically balanced/equal. The motors split the current, load, and heat equally. So - eliminate control complication by constraining your drive system to identical front/rear components at the outset.
A simple control strategy is to use a Cycle Analyst (preferably V3 but V2 with current throttle is okay) to provide a separate voltage source to drive the two controller throttle inputs and use a single external shunt for the CA. The single operator throttle goes to the CA. For your power levels, you can use the CA off-the-shelf external shunt. Run both controllers off the external shunt and the CA won't know it's running two motors and will show/control the summed current for both. Gear motors are ideal because of the freewheel clutches - you can easily run on either, both, or neither motor and there is no cogging downside.
A simple control strategy is to use a Cycle Analyst (preferably V3 but V2 with current throttle is okay) to provide a separate voltage source to drive the two controller throttle inputs and use a single external shunt for the CA. The single operator throttle goes to the CA. For your power levels, you can use the CA off-the-shelf external shunt. Run both controllers off the external shunt and the CA won't know it's running two motors and will show/control the summed current for both. Gear motors are ideal because of the freewheel clutches - you can easily run on either, both, or neither motor and there is no cogging downside.
douglashart
100 W
thanks much for the input. the diagram really helps.
You can use a single battery and two entirely different motor/controller combinations with the SA version of the Cycle Analyst. Run the battery wires through the separate CA shunt, and then branch them to each controller. If you want, you can forget about the CA, and use a double throttle instead,or two throttles (one on each side), or a throttle on the front motor and PAS on the back. They all work well. I prefer PAS on the back motor only and the throttle working both motors. If you want to use PAS, it's better if you have a multi-level one - especially with higher power systems.
Kingfish
100 MW
2WD (Two-Wheel Drive) FAQ
That's part of the story. There are many other contributors here.
We finally had a 3" dusting of snow here the other day and the studded tires on the 2WD performed as expected. Glad I had it - made the commute very fun! 8)
Cheers, KF
That's part of the story. There are many other contributors here.
We finally had a 3" dusting of snow here the other day and the studded tires on the 2WD performed as expected. Glad I had it - made the commute very fun! 8)
Cheers, KF
wineboyrider
1 MW
PSST. Check this controller out...
http://www.bmsbattery.com/controller/607-s06-250w-imitation-torque-square-wave-controller.html
http://www.bmsbattery.com/controller/607-s06-250w-imitation-torque-square-wave-controller.html
