Builditgood
10 mW
Hi. A friend and me we're discussing which components govern which factors and arrived at the following. What do you folks think?
The motor and it's windings have a certain resistance when cold and so draw a max current for a fixed voltage (e.g. plug a 1000W hub into a 50V battery and it will ask for 20A). We surmised that if you hook a motor up to a controller that cannot supply the current required then you risk damaging the controller and conversely if a controller is rated to more than what the motor requires then the motor draws as much as it needs and no more. The wattage of a system is(should be) therefore determined by the motor and not the controller.
The current draw will increase as the motor heats up because the resistance in the windings gets greater with temperature. This can lead to bogging down, the theory behind which we haven't figured out yet.
The controller will pull the current it requires from the battery and the battery must have enough capacity to supply what is required. The ability of a pack to supply current is calculated by either multiplying the Ah by discharge rates (C) and f.o.s. or multiplying the cell current capicty by the number of parallel strings.
That's as far as we've got for now☺
The motor and it's windings have a certain resistance when cold and so draw a max current for a fixed voltage (e.g. plug a 1000W hub into a 50V battery and it will ask for 20A). We surmised that if you hook a motor up to a controller that cannot supply the current required then you risk damaging the controller and conversely if a controller is rated to more than what the motor requires then the motor draws as much as it needs and no more. The wattage of a system is(should be) therefore determined by the motor and not the controller.
The current draw will increase as the motor heats up because the resistance in the windings gets greater with temperature. This can lead to bogging down, the theory behind which we haven't figured out yet.
The controller will pull the current it requires from the battery and the battery must have enough capacity to supply what is required. The ability of a pack to supply current is calculated by either multiplying the Ah by discharge rates (C) and f.o.s. or multiplying the cell current capicty by the number of parallel strings.
That's as far as we've got for now☺