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What does a rotor do?

In a machine or engine, a rotor is a rotating component that transfers or modifies motion, energy, or fluid. It can have different functions depending on the specific device it is part of:

1. Electric Motors and Generators: In electric motors, the rotor spins within a stationary set of stator windings to convert electrical energy into mechanical energy. In generators, the process is reversed, with the rotor spinning due to mechanical force to produce electrical energy. The rotor carries conductive windings or magnets that interact with the magnetic field created by the stator to produce rotation or generate electricity.

2. Internal Combustion Engines: In piston engines, the rotor refers to the rotating crankshaft. The pistons, connected to the crankshaft by connecting rods, transfer the reciprocating motion of the pistons into rotational motion of the crankshaft. The crankshaft then transmits this rotational motion to other parts of the engine or machinery it is connected to.

3. Fluid Pumps and Compressors: In pumps and compressors, the rotor is a spinning component that moves fluids or gases through the device. The shape of the rotor, along with the pump or compressor housing, creates areas of high and low pressure, which draws in and expels the fluid or gas. The rotor's rotation generates the necessary pressure and flow.

4. Power Drills and Impact Drivers: In power tools such as drills or impact drivers, the rotor is the part that spins and provides power to the drilling or driving mechanism. The rotor, typically driven by an electric motor, rotates the drill bit or impact mechanism to perform the desired task.

5. Helicopters: In helicopters, the rotor is the assembly of rotating blades that provide lift and control. The blades are attached to a central rotating hub, which transfers power from the engine to the blades, causing them to spin. The spinning blades generate aerodynamic forces that lift the helicopter and enable it to fly.

These are just a few examples of the many applications of rotors in different devices and machines. Rotors play a crucial role in converting, transmitting, or generating motion, energy, or fluid flow in a wide range of engineering and industrial applications.