phase switcher

例句：

1. 1. The phase switcher is responsible for switching the power supply between different phases.
   相位开关器负责在各个相位之间切换电源供应。
2. 2. The phase switcher was designed to improve the efficiency of the electrical system.
   相位开关器被设计用来提高电气系统的效率。
3. 3. The phase switcher was used in the new power grid project to ensure stable power supply.
   在新的电网项目中，相位开关器被使用来确保稳定的电力供应。