θ0=180°*m/(Pn*f/f0) (provided 2θ0−θr90°)wherein, a frequency of vibration which is to be reduced is represented with f, a pole pair number is represented with Pn, an electrical frequency is represented with f0=Pn*N, a motor revolution is represented with N, m=1, 3, 5, . . . , an angle of the rib with respect to the rotor center is represented with θr, therefore making of motor highly effective and decreasing of the motor acoustic noise are coped with."/>
Brushless DC motor and brushless DC motor controller
A brushless DC motor has a stator and a rotor. An angle θ0 between an edge section of the flux barrier on a magnetic pole center side and an edge section on a side for coming in contact with the rib of adjacent flux barrier, with respect to the rotor center, is determined to be equal to or greater than an angle satisfying a following relationshipθ0=180°*m/(Pn*f/f0) (provided 2θ0−θr90°)wherein, a frequency of vibration which is to be reduced is represented with f, a pole pair number is represented with Pn, an electrical frequency is represented with f0=Pn*N, a motor revolution is represented with N, m=1, 3, 5, . . . , an angle of the rib with respect to the rotor center is represented with θr, therefore making of motor highly effective and decreasing of the motor acoustic noise are coped with.
展开▼
机译：无刷直流电动机具有定子和转子。磁极中心侧的磁通屏障的边缘部分和与相邻磁通屏障的肋条接触的一侧的边缘部分之间的角度θ 0 相对于转子中心被确定为等于或大于满足以下关系的角度<？in-line-formulae description =“在线公式” end =“ lead”？>θ 0 = 180 °* m /（ Pn * f / f 0 ）（提供2θ 0 -θ r <90°）<？in-line-formulae description = “在线公式” end =“ tail”？>其中，要减小的振动频率用f表示，极对数用Pn表示，电频率用f 0 = Pn * N表示，电动机转速表示其中N，m = 1，3，5，。 。 。肋相对于转子中心的角度用θ r 表示，因此可以有效地使电动机高效化并降低电动机的噪声。
展开▼
