Hello folks. First time posting, but Ive got an interesting question. I hope Ive done enough searching to avoid duplication, but you never know with these things.
If you were to put power across a single resistor, a specific wattage, for instance, the result would be a specific voltage and current. You could not, for instance, use a higher voltage with less current, but use the same amount of total watts.
Electric motors, however, are very different. Their behavior varies depending on voltage AND current; a specific wattage across a motor tells you nothing about how it will behave. You have to know the current and the voltage, or equivalent information, to know what speed and torque it will have at that moment. Even at the same wattage, but different voltage and current, it will have different speed and torque characteristics.
But suppose you want to choose what voltage AND what current will run through your motor, in order to more tightly control its behavior? How do you regulate a circuit in that way? Can it be done precisely even if your voltage and current are not constant, but still sufficient?
If you were to put power across a single resistor, a specific wattage, for instance, the result would be a specific voltage and current. You could not, for instance, use a higher voltage with less current, but use the same amount of total watts.
Electric motors, however, are very different. Their behavior varies depending on voltage AND current; a specific wattage across a motor tells you nothing about how it will behave. You have to know the current and the voltage, or equivalent information, to know what speed and torque it will have at that moment. Even at the same wattage, but different voltage and current, it will have different speed and torque characteristics.
But suppose you want to choose what voltage AND what current will run through your motor, in order to more tightly control its behavior? How do you regulate a circuit in that way? Can it be done precisely even if your voltage and current are not constant, but still sufficient?