A method of clamping an output current of a three-phase power converter is provided. The three-phase power converter includes three switch bridge arms and provides a three-phase output voltage command (V ref_max , V ref_mid , V ref_min ), and each switch bridge arm has an upper switch (S u1 , S v1 , S w1 ) and a lower switch (S u2 , S v2 , S w2 ) connected in series. The method includes steps of: determining that the output current (i u , i v , i w ) is greater than a first current threshold value to activate a current clamping control procedure, comparing a carrier signal with the three-phase output voltage command (V ref_max , V ref_mid , V ref_min ) to turn on the lower switches (S u2 , S v2 , S w2 ) by a first zero vector (vo) when the carrier signal is rising and turn on the upper switches (S u1 , S v1 , S w1 ) by a second zero vector (v 7 ) when the carrier signal is falling, determining that the output current (i u , i v , i w ) is greater than a second current threshold value to activate an overcurrent protection procedure, wherein the second current threshold value is greater than the first current threshold value.