Pre-Charge and Bypass Diode
Posted: Tue Nov 03, 2020 9:27 am
Hi, I have a few questions about the pre-charge resistor and bypass diode. I'm using your RoboClaw 2x60A Motor Controller with an ElectroCraft M-26 motor (max current 80 A) and another smaller motor (2-4 A max). Input voltage is 24 V.
- What is the minimum time for pre-charge? Would .25 seconds still protect the controller?
- How much current would be flowing through the circuit for pre-charging? I'm putting a switch to let me turn off the pre-charge and want to make sure it's rated for enough current.
- If power is removed from the board briefly (maybe .1 seconds) while switching from the pre-charge circuit to full power, would this damage the board?
- I think I read somewhere that the damage to the controller happens over time, so failing to use the pre-charge one or a couple times shouldn't totally kill the board, but doing so regularly would. Is this correct?
- In the image above it looks like the bypass diode is letting regenerative voltage go around the fuse and into the battery. Is this correct?
- If so, how does the fuse protect the battery from a regenerative voltage spike? Or is that not the fuse's job? Sorry if this is obvious, I am still a relative novice with electronics.