On some drivetrains…especially locomotives…an engine is coupled to a generator, which then sends electrical power to electric motors at the wheels.
This eliminates the clutch and individual gears: essentially, a continuously variable transmission with an infinite spectrum of gear ratios.
IIRC, you get maximum engine performance at the torque peak of that engine.
Torque is a twisting force, and Load is the resistance to that torque.
A truly Ideal transmission should directly measure ( not estimate) the torque/load split instantly and continuously, thus maintain an optimum gear ratio for each instant.
IIRC, Ohms are the measurement of electrical resistance.
Can an Ohmeter in the electrical drivetrain measure electrical resistance as a direct function of mechanical resistance, i.e. torque/load?
The best way would be to measure power output, you could do this using a mechanical sensor, such as a tacho, where you quantify the number of revolutions, and multiply this by the current drawn from the supply.
You can then vary the current by using electronic switching devices, this then allows you to build in protection to prevent overload and overspeed.
Ohmmeters work by putting a small known voltage across the device to be tested and measuring the resulting current. This doesn’t work very well when the device under test has power applied to it, and you’ll just end up blowing the ohmmeter (hopefully it has a fuse in it, if not it’s time for a new meter).
In something like a big motor, it’s easier to measure the voltage and current, then you can calculate the actual power used by the motor to figure out how heavily loaded it is.
A generator/motor combination isn’t much like a continuously variable transmission. There’s no direct connect between the electric motor and the diesel motor, so there’s no need to “optimize” the “gear ratio” as such.
I’m not sure why you’d be wanting to measure the load. In some sense you can measure the load by noting how much fuel is being delivered to the injector racks, minus any inefficiencies in the drive train.
There is just not resistance, but impedance in a electric motor, a different type of resistance, that doesn’t cause any losses (like resistance) but does consume power to overcome. Ohm meters don’t meauser this.