Because brushless direct current(BLDC) motors have the advantages of a compact size, high power density, high efficiency, and long operating life time, they are widely used in many industrial products and electric tra...Because brushless direct current(BLDC) motors have the advantages of a compact size, high power density, high efficiency, and long operating life time, they are widely used in many industrial products and electric traction systems. It is known that the BLDC motors have no brushes for commutation. They are commutated with electronically commutation. So, the rotor position information of the BLDC motors must be known to understand which winding will be energized according to the energizing sequence. In most of the existing BLDC motor drivers, rotor position information is detected by Hall effect sensors. This kind of mechanical position sensors will bring additional connections and costs, reliability decrease and noise increase. In order to improve the control performance and extend the range of speed regulation for BLDC motors, a position sensorless control method is proposed in this paper. In the proposed control method, rotor position information of the BLDC motors is detected from the back electromagnetic forces(back-EMFs) which are estimated by an unknown-input observer with line to line currents and line to line voltages. For the purpose of verifying the effectiveness of the proposed control method, a model is built and simulated on the Matlab/Simulink platform. The simulation results show that the speed regulation performance of BLDC motors is improved compared with using Hall effect sensors. At the same time, the reliability of the BLDC motors is improved and the costs of them are reduced because the position sensor is eliminated.展开更多
为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有...为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有的模拟控制电路相比，其结构简单。实验结果表明，系统调速范围可达到10～1000r／min，有较宽的调速范围。展开更多
文摘Because brushless direct current(BLDC) motors have the advantages of a compact size, high power density, high efficiency, and long operating life time, they are widely used in many industrial products and electric traction systems. It is known that the BLDC motors have no brushes for commutation. They are commutated with electronically commutation. So, the rotor position information of the BLDC motors must be known to understand which winding will be energized according to the energizing sequence. In most of the existing BLDC motor drivers, rotor position information is detected by Hall effect sensors. This kind of mechanical position sensors will bring additional connections and costs, reliability decrease and noise increase. In order to improve the control performance and extend the range of speed regulation for BLDC motors, a position sensorless control method is proposed in this paper. In the proposed control method, rotor position information of the BLDC motors is detected from the back electromagnetic forces(back-EMFs) which are estimated by an unknown-input observer with line to line currents and line to line voltages. For the purpose of verifying the effectiveness of the proposed control method, a model is built and simulated on the Matlab/Simulink platform. The simulation results show that the speed regulation performance of BLDC motors is improved compared with using Hall effect sensors. At the same time, the reliability of the BLDC motors is improved and the costs of them are reduced because the position sensor is eliminated.
文摘为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有的模拟控制电路相比，其结构简单。实验结果表明，系统调速范围可达到10～1000r／min，有较宽的调速范围。
