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    • 12. 发明公开
    • 직류모터용 전기자기파 감쇄회로
    • 降低直流电机电磁干扰的电路
    • KR1020070002467A
    • 2007-01-05
    • KR1020050058016
    • 2005-06-30
    • 이동균
    • 이동균이종한
    • H02M1/12
    • H02K11/20H03H9/46
    • An electromagnetic attenuation circuit for a DC motor is provided to reduce an electromagnetic noise and prevent an erroneous operation of electric-electro products by including a common mode coil, a differential mode coil, and a capacitor. An electromagnetic attenuation circuit for a DC motor includes a junction capacitor(c10), a common mode noise filter(20), a differential mode noise filter(30), and an arc discharge noise filter(40). The junction capacitor(c10) matches an impedance of a circuit. The common mode noise filter(20) includes a common mode coil, a first capacitor, and a second capacitor. The common mode coil is connected to the junction capacitor(c10) in parallel. The first capacitor is connected between a positive electrode of the common mode coil and a ground. The second capacitor is connected between the ground and a negative electrode of the common mode coil. The differential mode noise filter(30) includes a third capacitor connected to an output terminal of the common mode noise filter(20) in parallel, and a differential mode coil connected to both ends of the third capacitor. The arc discharge noise filter(40) is connected between a power input terminal of a motor and the differential mode noise filter(30), and absorbs an arc discharge noise generated from a brush of the motor.
    • 提供一种用于DC电动机的电磁衰减电路,以减少电磁噪声,并且通过包括共模线圈,差模线圈和电容器来防止电气产品的错误操作。 用于直流电动机的电磁衰减电路包括结电容器(c10),共模噪声滤波器(20),差模噪声滤波器(30)和电弧放电噪声滤波器(40)。 结电容器(c10)匹配电路的阻抗。 共模噪声滤波器(20)包括共模线圈,第一电容器和第二电容器。 共模线圈并联连接到结电容器(c10)。 第一电容器连接在共模线圈的正电极和地之间。 第二电容器连接在共模线圈的接地和负极之间。 差模噪声滤波器(30)包括并联连接到共模噪声滤波器(20)的输出端的第三电容器和连接到第三电容器两端的差模线圈。 电弧放电噪声滤波器(40)连接在电动机的电力输入端子和差模噪声滤波器(30)之间,并且吸收由电动机的电刷产生的电弧放电噪声。