[ Abstract ] This paper discusses the concept of time-division multiplexing and provides a detailed explanation of its technology and applications, showcasing its promising application prospects. [ Keywords ] Soft starter, frequency converter, time-division multiplexing, sequential start/stop, dissolved oxygen control, constant voltage frequency conversion regulation. Introduction : Soft starters and frequency converters are modern intelligent electrical devices that have emerged with the development of semiconductor and power electronics technologies, and are widely used in AC power drive equipment. Their emergence has greatly improved the starting performance of squirrel-cage asynchronous motors and eliminated the need for expensive DC motors and AC series-wound regulation methods for motor speed control. Their excellent performance has been widely favored. However, their high price has also brought some obstacles to their widespread application. Generally, people will not abandon simple and inexpensive methods such as Y-Δ starting or autotransformer reduced voltage starting unless absolutely necessary. Some engineers and technicians also pursue advanced technology without considering economic benefits, making the application of soft starters and frequency converters merely superficial, losing their effectiveness and meaning. For example, equipment that doesn't require frequent starts is equipped with a soft starter, and after starting, it operates below its rated speed for extended periods. Similarly, several machines operating in parallel are each regulated simultaneously by a frequency converter, making it difficult to achieve the required control precision. Studying their operation reveals that the soft starters and frequency converters only occupy a tiny fraction of the equipment's actual operating time, with over 99% of the time spent idle. This means their capabilities are only utilized to a negligible extent, and this waste of capacity directly results in wasted investment. Recognizing this significant potential and inspired by network communication technologies, the author proposed the concept of time-division multiplexing (TDM) and, based on years of experience, designed application examples and circuits. 1. The Concept and Origin of Time-Division Multiplexing Time-division multiplexing (TDM) involves a single main unit distributing its capacity (time-based, not spatial-based) to multiple devices at different times. This differs from common applications like air conditioning (one outdoor unit, compressor, and condenser powering two indoor units, fan and evaporator) and industrial applications (one inverter powering multiple motors simultaneously). TDM allocates the main unit's remaining capacity (time-based, not spatial-based) to different devices at different times. The two most common multiplexing technologies are Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM). [b][align=center]For more details, please click: Time-Division Multiplexing Technology and Applications of Soft Starters and Inverters[/align][/b]