V/f Control for Switched Reluctance Motor

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<p>This paper proposes a novel V/f control method for switched reluctance motor (SRM). The proposed method does not require rotor position information. In addition, the wide operating range including magnetic saturation region of the SRM and high torque/ampere ratio are achieved without complicated pre-measurement or finite element analysis (FEA). This paper proposed the following three methods and confirmed their effectiveness: (A) a virtual rotor magnetic flux is generated by controlling the zero-phase current with a PI controller, which realizes the V/f control for the SRM, (B) the damping control gain is designed to be stable at all operating points since the rotor magnetic flux and inductance value change dynamically according to the operating conditions, and (C) a high torque/ampere is achieved by applying both i0 = iq control and id =0 control. In the experiment, the proposed method achieved the stable operation in all N-T regions for the tested SRM. In addition, the current RMS value is reduced by 39% at the torque of 0.05p. u. compared with no MTPA control, which is the almost performance as the drive with the position sensor.</p>

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