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A Novel Third Harmonic Injection Method for closed Loop Control of PMSM Motors Bharath Kumar Suda James David .. Eaton Corporation Abstract - In closed loop control using Field Oriented II. Third Harmonic Injection METHODOLOGY. Control (FOC), three phase voltage outputs of FOC. controller are not in a manner that the resultant stator A. Field Oriented Control voltage vector and rotor magnetic axis are 90 electrical For simplicity, we consider 3-phase, 2 pole star- apart. Calculation of the Third Harmonic Value based on rotor angle measurement can lead to phase difference connected PMSM motor with isolated neutral point. between fundamental and Third Harmonic voltages, and Consider the dq reference frame as shown in the Figure 1. can lead to degraded performance. This paper presents a Now, in any given position of the rotor, we can resolve Novel methodology to dynamically calculate Third Harmonic the magnetic fields from A, B and C phases into dq axes value using the three phase voltage outputs from the FOC direction if we know the rotor position.
A Novel Third Harmonic Injection Method for Closed Loop Control of PMSM Motors . Bharath Kumar Suda † † James David †Eaton Corporation Abstract - In closed loop control using Field Oriented
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