For example if I connect a 90v motor to a 120v battery source doesn’t that overheat and blow my motor?
Why is it though when it’s 120v from the wall then the motor is still fine?
In: Engineering
Some good comments here already, but since you mentioned tools, here’s an analogy that might click:
“Why does your air compressor (110psi 6CFM) not overload tools that only use 1.8 CFM, 2.5 CFM, 5.2 CFM (etc. anything less than 6)?
It’s basically the same idea. Voltage is like pressure, Amps are like flow rate. The tool will use as much “flow rate” as its design requires. The combination of flow rate and pressure together describes how much “power” is required to run the tool; that’s Watts!
You can also have multiple tools hooked up at the same time, but if their combined CFM is greater than the compressor can supply, the pressure is going to drop – voltage actually does the same thing, but the compressor in that case is usually pretty big (e.g. a power plant). So your Amps aren’t limited by the source, they’re limited by the breaker. Limit is the key word there. The 15A isn’t what’s coming through the wire all the time, it’s how much is *allowed* to come through the wire.
Latest Answers