| 主权项 |
1. A ground detecting apparatus electrically connected to an alternating current power supply apparatus, the ground detecting apparatus comprising:
a diode unit electrically connected to the alternating current power supply apparatus and generating a direct current voltage; a high voltage resistor comprising a first terminal and a second terminal, the first terminal of the high voltage resistor electrically connected to the diode unit, the second terminal of the high voltage resistor electrically connected to a first terminal of a first resistor, a second terminal of the first resistor electrically connected to a ground terminal; a metal oxide semiconductor field effect transistor comprising a drain, a gate and a source, the gate electrically connected to the high voltage resistor and the first resistor, the source electrically connected to the ground terminal; and a controller electrically connected to the drain, wherein the direct current voltage is divided by the high voltage resistor and the first resistor to obtain a judgment voltage to send to the gate; an on-off state of the metal oxide semiconductor field effect transistor is determined with the judgment voltage, and then a voltage level of the drain is changed to generate a pulse voltage signal; the controller performs detection according to the pulse voltage signal. |
