Shunt mod switch using relay?
I have been considering operating on my controller and installing a shunt so my ebike would climb and accelerate better. I do not want the shunt mod to be on all the time since travel distance is a factor for me. I was thinking of using a 30 amp relay that would switch using 12 volts to turn the shunt on and off. my ebikes motor is 48volts and 500watts. Any reason this wouldn't work?
Any recommendations on where to buy a controller that has regenerative brake input and is a good candidate for a shunt mod?
I couldn't wait to find another controller to mod so today I took my bike apart to get at the controller to install the shunt. After taking the controller apart I realized there would not be enough space to install a relay so I went ahead drilled the holes in the PCB and soldered the shunt in which I made of one of those pinch style paper clips. The speed on the bike remained the same, but there is more torque off the start and for climbing up hills. Here are some pictures of the controller and the mod. I got some real close ma
here is the type of paper clip I used. The diameter was very close to the diameter of the existing shunt.
here is the cover of my controller
the area of particular interest
the holes drilled
If you notice in the pictures my PCB has another shunt running that also powers the fets. Does anyone else PCB have this?