A power converting apparatus, comprising: three input terminals (Pr, Ps, Pt) respectively receiving a phase voltage of three-phase AC; three output terminals (Pu, Pv, Pw); first and second DC power supply lines (LH, LL); a converter including a first switch device group including three switch devices (Srp, Ssp, Stp) connected between each of said input terminals and said first DC power supply line and three switch devices (Srn, Ssn, Stn) connected between each of said input terminals and said second DC power supply line; an inverter including a second switch device group including three switch devices (Sup, Svp, Swp) connected between each of said output terminals and said first DC power supply line and three switch devices (Sun, Svn, Swn) connected between each of said output terminals and said second DC power supply line; a carrier generating unit generating a carrier having a waveform in which an absolute value of a slope is constant with respect to time, based on a reference value for internally dividing an amplitude of said waveform into a first value (drt) and a second value (dst), said first and second values being current conduction rates; converter gate signal generating units (11 to 16) performing commutation of said converter at a timing at which said carrier takes said reference value; and inverter gate signal generating units (21 to 26), where a value for internally dividing a value from said reference value to a maximum value of said carrier at a ratio between a third value (Vu*) and a fourth value (1-Vu*) is a first command value (dst·Vu*) and a value for internally dividing a value from a minimum value of said carrier to said reference value at a ratio between said third value and said fourth value is a second command value (-drt·Vu*), allowing adoption of a zero voltage vector as a switching mode of said inverter in a period in which said carrier takes said first command value to said second command value, characterized in that said converter gate signal generating unit compares said carrier and a current command having a trapezoidal wave shape for determining a ratio between said first value and said second value to perform commutation of said converter; and a slope area of said current command is expressed by: | ds * | = 1 + 3 tan ø − π / 6 / 2; and | dt* | = 1 − 3 tan ø − π / 6 / 2, where ds* and dt* represent a line current conduction rate, a phase angle ø is 0≤ø≤π/3, and ø represents a phase in an area obtained by equally dividing one cycle of a command signal phase θ into six. three input terminals (Pr, Ps, Pt) respectively receiving a phase voltage of three-phase AC; three output terminals (Pu, Pv, Pw); first and second DC power supply lines (LH, LL); a converter including a first switch device group including three switch devices (Srp, Ssp, Stp) connected between each of said input terminals and said first DC power supply line and three switch devices (Srn, Ssn, Stn) connected between each of said input terminals and said second DC power supply line; an inverter including a second switch device group including three switch devices (Sup, Svp, Swp) connected between each of said output terminals and said first DC power supply line and three switch devices (Sun, Svn, Swn) connected between each of said output terminals and said second DC power supply line; a carrier generating unit generating a carrier having a waveform in which an absolute value of a slope is constant with respect to time, based on a reference value for internally dividing an amplitude of said waveform into a first value (drt) and a second value (dst), said first and second values being current conduction rates; converter gate signal generating units (11 to 16) performing commutation of said converter at a timing at which said carrier takes said reference value; and inverter gate signal generating units (21 to 26), where a value for internally dividing a value from said reference value to a maximum value of said carrier at a ratio between a third value (Vu*) and a fourth value (1-Vu*) is a first command value (dst·Vu*) and a value for internally dividing a value from a minimum value of said carrier to said reference value at a ratio between said third value and said fourth value is a second command value (-drt·Vu*), allowing adoption of a zero voltage vector as a switching mode of said inverter in a period in which said carrier takes said first command value to said second command value, characterized in that said converter gate signal generating unit compares said carrier and a current command having a trapezoidal wave shape for determining a ratio between said first value and said second value to perform commutation of said converter; and a slope area of said current command is expressed by: | ds * | = 1 + 3 tan ø − π / 6 / 2; and | dt* | = 1 − 3 tan ø − π / 6 / 2, where ds* and dt* represent a line current conduction rate, a phase angle ø is 0≤ø≤π/3, and ø represents a phase in an area obtained by equally dividing one cycle of a command signal phase θ into six.