以某型号家用电动汽车的设计制造为研究背景,研究了作为动力系统的无传感器无刷直流轮毂电机(Brushless DC Motor,简称BLDCM)的起动控制策略。提出了基于反电势法的转子位置检测方法和三段式起动控制方法,并根据实际电机控制实验对上述...以某型号家用电动汽车的设计制造为研究背景,研究了作为动力系统的无传感器无刷直流轮毂电机(Brushless DC Motor,简称BLDCM)的起动控制策略。提出了基于反电势法的转子位置检测方法和三段式起动控制方法,并根据实际电机控制实验对上述方法进行了改进,取得了良好的控制效果。展开更多
针对无刷直流电机无位置传感器换相位置检测存在较大误差的问题,提出了一种基于线电压差分法的无刷直流电机(brushless DC motors,BLDCM)换相误差补偿新方法。利用线电压差值作为反馈量,通过PI调节器确定补偿角度β,因此确定最终的延时...针对无刷直流电机无位置传感器换相位置检测存在较大误差的问题,提出了一种基于线电压差分法的无刷直流电机(brushless DC motors,BLDCM)换相误差补偿新方法。利用线电压差值作为反馈量,通过PI调节器确定补偿角度β,因此确定最终的延时角度,利用基于(90°-α)的换相信号补偿策略,最终达到精确换相的目的。仿真验证了该方法可以对转子位置误差进行实时、有效地补偿,提高了电机的性能。展开更多
High-speed Brushless DC Motors(BLDCMs)usually adopt a sensorless control strategy and operate in three-phase six-state drive mode.However,the sampling errors of the rotor position and the driving method increase the I...High-speed Brushless DC Motors(BLDCMs)usually adopt a sensorless control strategy and operate in three-phase six-state drive mode.However,the sampling errors of the rotor position and the driving method increase the Internal Power Angle(IPA),resulting in a decrease in the efficiency of the system.Conventional IPA reduction strategies are either sensitive to motor parameters,or ignore diode freewheeling during the commutation process,or require additional current sensors.In this paper,a new strategy to reduce the IPA is proposed.Firstly,a Zero-Crossing Point(ZCP)detection method for the back-EMF without filter is proposed to reduce the sampling errors of the rotor position.Secondly,the relationship between the non-energized terminal voltage and the ZCP of the corresponding back-EMF is analyzed.The non-energized terminal voltage that has completed the diode freewheeling is divided into two triangles by half of the bus voltage.When the IPA is suppressed,the areas of the two triangles are equal.Thirdly,an advanced angle for reducing the IPA is obtained through a PI regulator which can eliminate the deviation between the two areas.Finally,both a simulation model and an experimental circuit are built to verify the proposed control strategy.展开更多
文摘针对无刷直流电机无位置传感器换相位置检测存在较大误差的问题,提出了一种基于线电压差分法的无刷直流电机(brushless DC motors,BLDCM)换相误差补偿新方法。利用线电压差值作为反馈量,通过PI调节器确定补偿角度β,因此确定最终的延时角度,利用基于(90°-α)的换相信号补偿策略,最终达到精确换相的目的。仿真验证了该方法可以对转子位置误差进行实时、有效地补偿,提高了电机的性能。
基金supported by the National Natural Science Foundation of China(No.51877006)the Key R&D Program of Shaanxi Province,China(No.2021GY-340 and 2020GY-140)the Aeronautical Science Foundation of China(No.20181953020)。
文摘High-speed Brushless DC Motors(BLDCMs)usually adopt a sensorless control strategy and operate in three-phase six-state drive mode.However,the sampling errors of the rotor position and the driving method increase the Internal Power Angle(IPA),resulting in a decrease in the efficiency of the system.Conventional IPA reduction strategies are either sensitive to motor parameters,or ignore diode freewheeling during the commutation process,or require additional current sensors.In this paper,a new strategy to reduce the IPA is proposed.Firstly,a Zero-Crossing Point(ZCP)detection method for the back-EMF without filter is proposed to reduce the sampling errors of the rotor position.Secondly,the relationship between the non-energized terminal voltage and the ZCP of the corresponding back-EMF is analyzed.The non-energized terminal voltage that has completed the diode freewheeling is divided into two triangles by half of the bus voltage.When the IPA is suppressed,the areas of the two triangles are equal.Thirdly,an advanced angle for reducing the IPA is obtained through a PI regulator which can eliminate the deviation between the two areas.Finally,both a simulation model and an experimental circuit are built to verify the proposed control strategy.
