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| Flux Weakening Control of Variable Flux Reluctance Machine Considering Resistive Voltage Drops in Armature and Zero-Sequence Loop |
| Guo Jiaqiang1,2, Liu Xu1,2, Li Shanhu1,2 |
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;
2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China |
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Abstract In the flux-weakening control of VFRM (Variable Flux Reluctance Machine, VFRM), ignoring the resistive voltage drops will influence the calculation of the reference current, which results in current loop saturation and the reference current cannot be followed. In this case, the output power of VFRM in flux-weakening region will be limited. To solve this problem, a flux-weakening control strategy considering the resistive voltage drops in armature and zero-sequence loop is proposed. Firstly, based on the voltage equation of VFRM and the constraints of voltage and current, the equations of the optimal reference current considering the resistive voltage drop was deduced by the Lagrange method. Then, the optimal reference current was calculated by the Newton-Raphson method according to the current state of VFRM. After considering the resistive voltage drop, the calculation accuracy of the reference current is improved, which is conducive to the stable operation of the VFRM in the flux-weakening region. Finally, the effectiveness of the method is verified by the experimental results.
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Received: 02 June 2020
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2021, Vol. 36 
