How is a synchronous motor typically represented in TPC schematics?

A synchronous motor is typically represented in TPC schematics by a circle with a sinusoidal symbol inside. This representation is significant as it visually communicates the principle of how a synchronous motor operates. The sinusoidal symbol indicates that the motor functions based on alternating current (AC), which is crucial for understanding its operation.

In this context, the circle represents the motor itself, while the sinusoidal symbol reflects the alternating magnetic field created within the motor, essential for its synchronous speed feature. This design allows engineers and technicians to quickly recognize the motor type and its operational characteristics within the schematic, facilitating better comprehension and analysis during troubleshooting and system design.

The other representations may not accurately convey the specific characteristics and operational principles of a synchronous motor, making the choice of the circle with a sinusoidal symbol the correct and most informative representation.