mcanderson0
Member
Thanks for the compliments. I love this little car.
Using dissimilar metals in an electrical circuit is not a problem. Although the resistance changes from part to part, it makes a small difference in the overall circuit, especially in my application. My voice coils measure 0.8ohm each, yet when all subs were connected with wire and aluminum rods, I still measure 0.8ohm. Theres very little resistance in the wire/connections since its all oversized.
The stainless steel washers against the box are for strength so that when I tighten the nuts, they dont break into the surface of the box. The rod and nuts are aluminum and the washers are copper. The main reason I used aluminum is that 3/8" copper threaded rod is nearly impossible to find.
In commercial/industrial applications, its common to have dissimilar metals to provide corrosion resistance, mechanical strength, or different electrical properties. I design industrial electric motors for a living, so everything in this build is purposeful.
Another good point to make is that large subwoofers commonly use aluminum voice coil wire to provide a lightweight voice coil for good response, yet use copper lead wires and silver solder to connect the two together.
And of course, all of our cars use copper wire throughout and are grounded to the steel chassis.
Using dissimilar metals in an electrical circuit is not a problem. Although the resistance changes from part to part, it makes a small difference in the overall circuit, especially in my application. My voice coils measure 0.8ohm each, yet when all subs were connected with wire and aluminum rods, I still measure 0.8ohm. Theres very little resistance in the wire/connections since its all oversized.
The stainless steel washers against the box are for strength so that when I tighten the nuts, they dont break into the surface of the box. The rod and nuts are aluminum and the washers are copper. The main reason I used aluminum is that 3/8" copper threaded rod is nearly impossible to find.
In commercial/industrial applications, its common to have dissimilar metals to provide corrosion resistance, mechanical strength, or different electrical properties. I design industrial electric motors for a living, so everything in this build is purposeful.
Another good point to make is that large subwoofers commonly use aluminum voice coil wire to provide a lightweight voice coil for good response, yet use copper lead wires and silver solder to connect the two together.
And of course, all of our cars use copper wire throughout and are grounded to the steel chassis.
