This study investigates a small film DC-link capacitor inverter for a permanent magnet synchronous motor drive system. Two control methods, including ad-q-axis current control and a positive torque region current cont...
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This study investigates a small film DC-link capacitor inverter for a permanent magnet synchronous motor drive system. Two control methods, including ad-q-axis current control and a positive torque region current control, are originally proposed to improve the torque dynamics of the drive system. In addition, a damping compensation method is used to improve the input power factor and reduce the input current harmonics. A current-loop predictive controller and a speed-looppredictivecontroller are first proposed to improve the dynamic responses of the interior permanent magnet synchronous motor drive system. To implement the drive system, a digital signal processor, TMS 320LF2808, is used as a control centre to execute the control algorithms. Experimental results can validate the correctness and feasibility of the proposed methods.
This study proposes a predictivecontroller design for a sensorless interior permanent-magnet synchronous motor drive system. The controllers include a current-loop predictive controller and a speed looppredictive co...
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This study proposes a predictivecontroller design for a sensorless interior permanent-magnet synchronous motor drive system. The controllers include a current-loop predictive controller and a speed looppredictivecontroller with an external load estimator. In addition, a rotor position estimator with on-line tuning stator resistance and q-axis inductance has been designed to reduce the estimating error. By using the proposed control algorithms, the closed-loop sensorless interior permanent-magnet synchronous motor drive system can achieve fast transient response, satisfactory load disturbance response and good tracking response. A digital signal processor, TMS320F2812, is used to perform the rotor position estimating algorithm and the predictive control algorithm. As a result, the hardware is very simple. The experimental results can validate the theoretical analysis and show that the predictivecontrollers have better performance than the proportional integral (PI) controllers.
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