SENSOR DEVICE AND ELECTRIC POWER STEERING DEVICE

A sensor device 100 is provided with: a main sensor 41 and a sub sensor 42 which sense a steering torque from an electric power steering device 101; first and second internal power sources 43, 44; first and second power source lines 50, 51 which are connected to the first and second internal power sources 43, 44, respectively, and which can supply power from the respective internal power sources to both the main sensor 41 and the sub sensor 42; and a first switch 45 and a second switch 46 which selectively switches, between the first and second power source lines 50, 51, power source lines forsupplying the power to both the main sensor 41 and the sub sensor 42. 传感器装置(100)具备：主传感器(41)和副传感器(42)，其检测电动动力转向装置(101)中的转向转矩；第内部电源和第二内部电源(43、44)；第电源线和第二电源线(50、51)，其分别与第内部电源和第二内部电源(43、44)连接，并且能够从各内部电源向主传感器(41)和副传感器(42)这两方供给电力；以及第切换开关(45)和第二切换开关(46)，其选择性地切换第电源线和第二电源线(50、51)中的向主传感器(41)和副传感器(42)这两方供给电力的电源线。