This paper proposes a possibility of using active front-end rectifier with the SVPWM method for induction motor speed control, which is applicable to small electric propulsion boats. The proposed method can produce a more precise sinusoidal input current waveform and a higher power factor than conventional methods. Its speed, torque, input current, DC voltage, and load current control performance are similar to or better than those of conventional methods. Through computer simulations using the PSIM program, the validity of the proposed method was verified by comparing and analyzing the characteristics of the conventional methods and the proposed method.

Introduction
Materials and methods
    Rectification Method of Electric Propulsion Ships
    Proposed AFE Rectifier
Results and discussion
    Simulation
    Induction motor of high speed range
    Induction motor of low speed range
Conclusion
References

• Jae-Jung HUR(Division of Education, Korea Institute of Maritime and Fisheries Technology) Corresponding author