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
In order to start up the brushless DC motor （BLDCM） without reverse rotation and smoothly switch the running state of the motor, a novel startup and smoothly switching method for a sensodess BLDCM is presented. Base...In order to start up the brushless DC motor （BLDCM） without reverse rotation and smoothly switch the running state of the motor, a novel startup and smoothly switching method for a sensodess BLDCM is presented. Based on the saturation effect of the stator iron, six short voltage pulses are applied to determine the initial rotor position and the rotor can be found within 60°. After that, a series of short and long voltage pulses are used to accelerate the motor and the variation of the response current is utilized to detect the rotor position dynamically. When the motor reaches a certain speed at which the back-electromotive force （EMF） method can be applied, all the power devices are turned off and the running state of the motor is smoothly switched at the moment determined by the relationship between the terminal voltage waveform and the commutation phases. The experimental results verify the feasibility and validity of the proposed method.展开更多
文摘In order to start up the brushless DC motor （BLDCM） without reverse rotation and smoothly switch the running state of the motor, a novel startup and smoothly switching method for a sensodess BLDCM is presented. Based on the saturation effect of the stator iron, six short voltage pulses are applied to determine the initial rotor position and the rotor can be found within 60°. After that, a series of short and long voltage pulses are used to accelerate the motor and the variation of the response current is utilized to detect the rotor position dynamically. When the motor reaches a certain speed at which the back-electromotive force （EMF） method can be applied, all the power devices are turned off and the running state of the motor is smoothly switched at the moment determined by the relationship between the terminal voltage waveform and the commutation phases. The experimental results verify the feasibility and validity of the proposed method.
