Synchronous machines are electrical devices that convert mechanical energy into electrical energy or vice versa. They operate at a constant speed, synchronized with the frequency of the electrical grid. This means that the rotation of the machine's rotor is directly linked to the alternating current (AC) frequency, making them essential in power generation and industrial applications. These machines can be classified into two main types: synchronous generators and synchronous motors. Synchronous generators, often used in power plants, produce electricity, while synchronous motors are used in various industrial processes to drive machinery. Their ability to maintain a constant speed makes them reliable for applications requiring precise control.