What are the advantages of single-phase autotransformers over ordinary transformers?

Low loss and high efficiency
A significant advantage of single-phase autotransformers is that they have low losses. This is due to their unique structural design, that is, the high-voltage side and the low-voltage side share part of the winding, which reduces the leakage magnetic field between the windings, thereby reducing iron loss and copper loss. In practical applications, this low-loss characteristic means less energy waste and helps to improve energy efficiency. For example, in the power supply system of large industrial equipment, the use of single-phase autotransformers can significantly reduce the loss during power transmission, saving a lot of electricity expenses for enterprises.
At the same time, single-phase autotransformers also have the characteristics of high efficiency. Due to the shared winding, the current path is shorter and the resistance is smaller, so the energy conversion efficiency is higher. This means that under the same input power, the single-phase autotransformer can output more useful power, further improving the energy utilization efficiency.
Low temperature rise and reliable use
Single-phase autotransformers also perform well in temperature rise control. Due to its compact structure and relatively small heat dissipation area, but thanks to its low loss characteristics, the heat generated is relatively less. Therefore, under normal operation, the temperature rise of single-phase autotransformers is low, which helps to extend the service life of the equipment and reduce maintenance costs.
Single-phase autotransformers have high reliability in use. With reasonable design and exquisite manufacturing technology, they can operate stably in various harsh environments. For example, in industrial environments with high temperature, humidity or high dust, single-phase autotransformers can still maintain excellent performance and ensure the stable operation of the power system.
Small size and light weight
Another significant advantage of single-phase autotransformers is their small size and light weight. This is due to the design concept of shared windings, which enables the equipment to achieve a compact structural layout while maintaining high efficiency. This compact structure makes single-phase autotransformers more convenient and flexible during installation and transportation, and can adapt to various space-constrained application scenarios.
For example, in power system renovation projects in high-rise buildings or small spaces, single-phase autotransformers are an ideal choice due to their small size and light weight. It not only saves valuable installation space, but also reduces transportation and installation costs, and improves the overall economic benefits of the project.
Low cost
Finally, single-phase autotransformers also have obvious advantages in terms of cost. The common winding design reduces the amount of materials used and manufacturing costs. At the same time, due to its high efficiency and low loss characteristics, the equipment can save a lot of electricity costs during operation. In addition, the maintenance cost of the single-phase autotransformer is relatively low because of its simple structure, low failure rate and easy maintenance.