ELECTRIC POWER DEVICES WITH AUTOMATICALLY ESTABLISHED INPUT VOLTAGE CONNECTION CONFIGURATION

Electric power devices and control methods are provided which automatically select a line voltage or phase voltage of an AC voltage supply. The electric power device includes a switchable circuit, a sensor and a switch control. The switchable circuit connects to the AC voltage supply, and includes multiple switchable elements. The sensor ascertains a voltage level of the AC voltage supply, and theswitch control automatically establishes a configuration of the switchable circuit through control of the multiple switchable elements. The switch control couples the electric power device in a line-line (delta) configuration to the AC voltage supply when the voltage level is in a first voltage range, and a line-neutral (wye) configuration when the voltage level is in a second voltage range. 提供了自动选择交流电压源的线电压或相电压的电力设备和控制方法。所述电力设备包括可切换电路、传感器和开关控制。所述可切换电路连接到所述交流电压源，并包括多个可切换元件。所述传感器确定交流电压源的电压电平，并且所述开关控制通过控制所述多个可切换元件自动建立所述可切换电路的配置。当所述电压电平在第一电压范围内时，所述开关控制以相线对相线(三角形)配置将所述电力设备耦合到所述交流电压电源，并且当所述电压电平在第二电压范围内时，所述开关控制以相线对中性线(Y字形)