...在于当无刷电动机匀速运转时,BEMF(反电动势)是正弦形的,指令电流也是正弦形的;而当有刷电动机匀速运转时,BEMF(反电动势)是恒定的。此外,因为相电流在改变,所以不论是转速恒定,还是负载恒定无刷电动机中的电感损失不影响稳态转矩。
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它从电子电路中经检测后计算获得转子磁极位置信号,实现电子换相,如电感法、反电动势法,其中以反电动势法(BEMF)较为成功。近年无传感器无刷直流电动机控制技术在航模电动机中的应用日渐增多。
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BEMF Back ElectroMotive Force 反电动势
BEMF phase change 反电势换相
bemf fbk lead 反电动势反馈前置
Dedicated Comparators for BEMF 专用比较器的电动势
SMO-BEMF 滑模观测器反电势
trapezoidal BEMF 梯形反电动势
BEMF BackElectroMotiveForce 反电动势
bemf-crossing-zero detecting 反电动势过零检测
Then the thesis detailedly dissertates its research pivot: the software realization of sensorless commutation detection based on the method of back electromotive force(Bemf) and open-loop commutation start-up. In this chapter, the method of BLDCM rotor position detection is first discussed.
然后,详细论述了本文的研究重点:基于反电动势法的五位置传感器换相检测和开环换相起动的软件实现。
参考来源 - 基于DSP的无刷直流电机数字控制系统研究·2,447,543篇论文数据,部分数据来源于NoteExpress
ObjectiveTo observe the effect of bionics pulsed electromagnetic fields (BEMF) on the biomechanical property of ovariectomized Wistar rats.
目的观察仿生脉冲电磁场(BEMF)对去卵巢大鼠腰椎和股骨生物力学性能的影响。
Aiming to minimize the torque ripple in condition of non-perfect BEMF waveform, the dissertation present a optimum current tracking control technique.
针对这种反电动势波形偏离理想波形的情况,本文提出了一种最优电流跟踪法来抑制转矩脉动。
Conclusion BEMF preventive therapy is effective in preventing the BMD decline in Wistar rats. BEMF is more effective than calcitonin as the therapy time prolongs.
结论BE MF有预防骨密度下降的作用,并随着预防治疗时间的延长,BEMF的预防作用较降钙素有更显著的效果。
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