各种颜色无污渍都是与应用模拟指出刷羽毛。
Reactive stains of various colors were applied with pointed brushes to simulate feathers.
依据永磁无刷直流电动机的数学模型及其转矩特性，分析了转矩脉动产生的多种原因，并介绍了各种有效的控制策。
According to the mathematical model and torque characteristics of permanent magnet brushless DC motor, the reasons that give rise to torque ripple have been analyzed in this paper.
比较了永磁无刷直流电机的各种起动方法，分析它们的优缺点，提出了适合光伏水泵系统的自寻最佳切换点的永磁无刷直流电机起动方法；
Different starting methods of permanent magnet brushless DC motor are compared, a starting method of self-search best commutation point of permanent magnet brushless DC motor is put forward.
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