inverter       
noun [ C ]  physics specialized uk/ɪnˈvɜː.tər/ us/ɪnˈvɝː.t̬ɚ/
 反相器,换流器
an electronic device or part of a circuit that changes direct current to alternating current
  Panel lights indicated that one of the three inverters had gone dead. 仪表板上的灯光显示,三台反相器中有一台已经坏掉。 
 She bought a power inverter and connected her portable TV to a car battery.  她买了一个电源换流器,并把自己的便携式电视机连接到汽车电池上。 
 - More examples
 - Without inverters, the direct current couldn't be changed into alternating current.
 - A power inverter that supplied some of the plane's electricity had failed.
 - Each system consists of a 165 watt module, a 20 amp controller, a 250 watt inverter and a 220 amp-hour battery bank.