This paper presents an application of rotor field

oriented control (RFOC) to a five-phase induction motor with

the combined fundamental and third harmonic currents. Based

on the motor model developed in a new d,q, n reference

frame, the complete theory and modeling of rotor field oriented

control of the five-phase induction motor are established.

Specifically, investigation is made to improve power density and

output torque of the five-phase induction motor by injecting

third harmonic of currents. By the proper dynamical

adjustment and steady state compensation, the rotor field

oriented control of the five-phase induction motor not only

achieves a high drive performance, but also controls the

fundamental and third harmonic flux and torque to generate the

desired nearly rectangular air-gap flux. Both simulation and

experimental results further verify the theoretical analysis and

demonstrate the feasibility and practical value of the proposed

five-phase induction motor drive.-This paper presents an application of rotor field

oriented control (RFOC) to a five-phase induction motor with

the combined fundamental and third harmonic currents. Based

on the motor model developed in a new d,q,d,q,n reference

frame, the complete theory and modeling of rotor field oriented

control of the five-phase induction motor are established.

Specifically, investigation is made to improve power density and

output torque of the five-phase induction motor by injecting

third harmonic of currents. By the proper dynamical

adjustment and steady state compensation, the rotor field

oriented control of the five-phase induction motor not only

achieves a high drive performance, but also controls the

fundamental and third harmonic flux and torque to generate the

desired nearly rectangular air-gap flux. Both simulation and

experimental results further verify the theoretical analysis and

demonstrate the feasibility and practical value of the proposed

five-phase induction motor drive.