无刷直流电机(Brushless DC Motor,BLDCM)作为一种高效、节能的电机类型,在石油、化工、交通等各领域得到了广泛应用。无位置传感器控制技术作为无刷直流电机控制的重要分支,通过检测电机反电动势或相电流等信息,实现电机的换相控制,无...无刷直流电机(Brushless DC Motor,BLDCM)作为一种高效、节能的电机类型,在石油、化工、交通等各领域得到了广泛应用。无位置传感器控制技术作为无刷直流电机控制的重要分支,通过检测电机反电动势或相电流等信息,实现电机的换相控制,无需额外的位置传感器,从而降低了系统成本,提高了系统可靠性。现通过分析无刷直流电机无位置传感器控制技术的研究现状,论证了现有方法的优缺点,并探讨了未来的发展方向。展开更多
The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the ...The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. A PWM-based current-sensorless robust sliding mode controller is developed that requires only the measurement of the output voltage. An extended state observer is developed to estimate a lumped uncertainty signal that comprises the uncertain load power and the input voltage, the converter parasitics, the component uncertainties and the estimation of the derivative of the output voltage needed in the implementation of the controller. A linear sliding surface is used to derive the controller, which is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics despite the absence of the inductor’s current feedback. The robustness of the controller is validated by computer simulations.展开更多
文摘无刷直流电机(Brushless DC Motor,BLDCM)作为一种高效、节能的电机类型,在石油、化工、交通等各领域得到了广泛应用。无位置传感器控制技术作为无刷直流电机控制的重要分支,通过检测电机反电动势或相电流等信息,实现电机的换相控制,无需额外的位置传感器,从而降低了系统成本,提高了系统可靠性。现通过分析无刷直流电机无位置传感器控制技术的研究现状,论证了现有方法的优缺点,并探讨了未来的发展方向。
文摘The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. A PWM-based current-sensorless robust sliding mode controller is developed that requires only the measurement of the output voltage. An extended state observer is developed to estimate a lumped uncertainty signal that comprises the uncertain load power and the input voltage, the converter parasitics, the component uncertainties and the estimation of the derivative of the output voltage needed in the implementation of the controller. A linear sliding surface is used to derive the controller, which is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics despite the absence of the inductor’s current feedback. The robustness of the controller is validated by computer simulations.
