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Field-Weakening Control for SPMSM Based on Final-State Control Considering Voltage Limit
Takayuki Miyajima,Hiroshi Fujimoto,Masami Fujitsuna 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
SPMSMs (Surface Permanent Magnet Synchronous Motors) are employed for many industrial applications. SPMSM drive systems should achieve fast torque response and wide operating range. In this paper, in order to fulfill fast response in field-weakening region, field-weakening control based on final-state control (FSC) is proposed. FSC settles state variables in a final state from an initial state with feedforward input during finite time. Previously, in the single-input single-output system, FSC considering input limit with linear matrix inequality was proposed. It is adapted to SPMSM which is the two-input two-output system in this paper. Finally, simulations and experiments are performed to show that the proposed method can achieve fast field-weakening control.
Optimal control of PMSMs using model predictive control with integrator
Shintaro Matsutani,Tadanao Zanma,Yuji Sumiyoshi,Muneaki Ishida,Akihiro Imura,Masami Fujitsuna 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Permanent magnet synchronous motors(PMSM) have been receiving much attention due to their high effi-ciency. Usually, an inverter is used to drive the PMSM. In conventional current control systems, the inverter is regarded as an ideal amplifier. However, there exist various constraints such as voltage saturation in current transient response and output nonlinearity in over modulation. Inaddition, an output of the inverter is limited to discrete values in aprecise sense. Thus, the system has an a ture of a hybrid dynamical system. In this paper, we propose a novel model predictive control(MPC) based current control system to improve performance in cases where the inverter can not provide the appropriate output. In MPC, a steady state error often occurs due to the modeling error. In order to over come the problem, we extend the model in which the accumulation of the steady state error is included. The effectiveness of the proposed method is shown through simulations and experiments.