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    • 17. 发明专利
    • Low-noise inverse emf sensing brushless dc motor
    • 低噪声反相电磁感应无刷直流电动机
    • JP2006254693A
    • 2006-09-21
    • JP2006103615
    • 2006-03-07
    • Fisher & Paykel Appliances Ltdフィッシャー アンド ペイケル アプライアンシーズ リミテッド
    • HARWOOD JONATHAN D
    • H02P6/16
    • H02P6/182
    • PROBLEM TO BE SOLVED: To provide a motor system controlled electrically for conquering the fault of noise in a brushless DC motor. SOLUTION: The brushless DC motor (21) of a low-noise electronic three-phase bridge (22) control type is suitably used for a pump of a home electric apparatus and the other apparatus. By using reverse EMF zero-cross sensing (24), the position of a rotor and a conversion time of a stator winding are determined. Motor torque and speed are controlled by carrying out the pulse width modulation (32) of an operation of a bridge switching device which has been switched from an off-state to an on-state for each new conversion time. All three stator windings (A, B and C) are made to have continuity in current at the time of the conversion of each winding so that the waveform of the motor current is improved, and further, motor noise is reduced. The current in a single winding is always finished before the completion of the conversion cycle, and the reverse EMF of the winding (A) can be detected with respect to the zero crossing. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种用于在无刷直流电动机中征服噪声故障的电动控制系统。 解决方案:低噪声电子三相桥(22)控制型的无刷直流电动机(21)适用于家庭用电器的泵和其他装置。 通过使用反向EMF零交叉感测(24),确定转子的位置和定子绕组的转换时间。 通过对每个新的转换时间进行从关闭状态切换到开状态的桥式开关装置的动作的脉宽调制(32)来控制电动机的转矩和转速。 所有三个定子绕组(A,B和C)在每个绕组转换时具有电流连续性,从而改善电动机电流的波形,进一步降低电机噪声。 单个绕组中的电流在转换周期完成之前始终完成,并且可以相对于过零点检测绕组(A)的反向EMF。 版权所有(C)2006,JPO&NCIPI