Abstract: In order to control the flux and torque and eliminate harmonic status currents of seven-phase induction motors simultaneously, three methods were proposed according to the principle of reducing the harmonic subspace composite voltage vectors in the space decomposition model. These methods included the space vector pulse width module (SVPWM) A where the composite voltage vector of the 3rd harmonic subspace is zero, the SVPWM B where the composite voltage vector of the 3rd or the 5th harmonic subspace is zero, and the unified voltage module (UVM) C that adopts a closed-loop motor control strategy. Speed-regulating experiments were then performed to verify the efficiency of the three methods in control of the flux and torque. The results show that the performance on harmonic currents elimination using SVPWM A or SVPWM B is not satisfying, since only the action time and sequence of voltage vectors are adjusted while the modulation depth and motor speed are changing continuously. However, a closed loop control of motor is realized under the constraint that harmonic space voltage is zero; therefore, the harmonic currents were eliminated remarkably using UVM C. Compared with the fundamental content (52.5 dB), the 3rd and 5th harmonic contents are very small, only 17.8 and 9.8 dB, respectively.