Rotating diode one-tube open circuit detection method and system of multi-phase angle joint brushless exciter

The invention relates to a rotating diode one-tube open circuit detection method and system of a multi-phase angle joint brushless exciter. The method comprises the following steps: after the excitingcurrent entering a stator exciting winding of the exciter is obtained, dividing the exciting current into two paths to obtain first exciting current and second exciting current, delaying the first exciting current for a reference time to obtain first delayed exciting current, subtracting the second exciting current from the first delayed exciting current to obtain current containing odd harmonics, adding the first delayed exciting current with the second exciting current to obtain third exciting current, filtering a DC component in the third exciting current and the component of phase multiple reference frequency to obtain current containing even harmonics, and performing diode one-tube open circuit detection according to the current containing the odd harmonics and the current containingthe even harmonics. By ad