馬達堵轉測試

${\displaystyle I_{S}}$是電壓在${\displaystyle V_{S}}$時的短路電流
${\displaystyle I_{SN}}$是電壓在額定電壓${\displaystyle V}$時的短路電流
${\displaystyle I_{SN}=I_{S}\times {\frac {V}{V_{S}}}}$

${\displaystyle W_{S}}$是短路時的總輸入功率
${\displaystyle V_{SL}}$是短路時的輸入線電壓
${\displaystyle I_{SL}}$是短路時的輸入線電流
${\displaystyle cos\phi _{S}}$是短路時的功率因素
${\displaystyle cos\phi _{S}={\frac {W_{S}}{{\sqrt {3}}{V_{SL}}{I_{SL}}}}}$[8]

${\displaystyle Z_{01}}$是短路時，參考定子的短路阻抗
${\displaystyle X_{01}}$是短路時，參考定子的單相漏感抗
${\displaystyle Z_{01}={\frac {\text{short circuit voltage per phase}}{\text{short circuit current}}}={\frac {V_{S}}{I_{S}}}}$

${\displaystyle W_{cu}}$ 是總銅損
${\displaystyle W_{c}}$ 是總鐵損

${\displaystyle W_{cu}=W_{S}-W_{c}}$
${\displaystyle W_{cu}={3}\times {{I_{S}}^{2}{R_{01}}}}$

${\displaystyle R_{01}={\frac {W_{cu}}{3{I_{S}}^{2}}}}$

${\displaystyle X_{01}={\sqrt {{Z_{01}}^{2}-{R_{01}^{2}}}}}$