Hi!
I want to use a 22.2V (5000mAh) battery to supply power to four 12V DC-motors through the dual VNH5019 motor controller.
This will be done via PWM of an Arduino.
The questions is thus: Will I need to use some kind of DC-DC converter to regulate the voltage to the 12V used by the motors or should I just set the duty cycle of the PWM so 12V max will be used by the motors?
My personal guess (wrong as it may be) is that it’s not plausable to use a DC-DC converter since it would be subjected to a whole lot of current (5A per motor at stall current) as well as having to remove ~10V. I guess that would mean to much heat would have to be dissipated?
The motors I am using are: pololu.com/product/1447 and the battery is a 22.2V 5000mAh LiPo-battery.
Any advice as how to properly do this would be greatly appreciated!
- Olle