Final answer:
The question discusses a setup where a synchronous motor is supplied by a DC generator, which is separately excited by a DC source of constant voltage and driven by a turbine. The DC generator is responsible for providing the external field excitation to the synchronous motor, and its operation is based on the rotation of a coil within a magnetic field to generate a varying emf.
Step-by-step explanation:
The question pertains to the operation of a synchronous motor and its connection to a DC generator, where the DC generator is separately excited by a DC source of constant voltage and driven by a turbine. We can analyze the statements provided:
- The synchronous motor and the DC generator cannot be connected in parallel since the motor operates on AC while the generator supplies DC.
- The DC generator is driven by a turbine, which means the mechanical energy to turn the generator's shaft is provided by the turbine.
- The DC source for the generator is of constant voltage, ensuring that the generator is separately excited and supplies a steady DC output.
- The synchronous motor is not self-excited; rather, it requires an external DC field supply, which, in this case, is provided by the generator.
The principles of operation for both synchronous motors and DC generators rely on the interaction between magnetic fields and current-carrying conductors. In a DC generator, a coil is rotated in a uniform magnetic field, which induces an electromotive force (emf) that varies sinusoidally with time, a concept illustrated in various referenced figures.
On the other hand, a synchronous motor operates by converting AC electrical energy into mechanical energy, and the speed of rotation is synchronized with the frequency of the AC supply.