| 摘要 |
PURPOSE: An apparatus for blocking an electromagnetic wave of a blower motor for a vehicle is provided to remove an electromagnetic wave by connecting a condenser and a chock coil around a blower motor in series or in parallel. CONSTITUTION: The apparatus connects condensers(C1,C2,C3) so as to remove a resonant frequency of an electromagnetic wave noise generating from a motor itself operating so that an air is circulated to a vehicle with a rotation state, a barister(BR1) to coils(L1-L7), baristers(BR2-BR4) and condensers(C4-C9), and then condensers(C10, C11) to an output terminal of the coil(L6) and the coil(L7), a condenser(C12) and coils(L14)(L15) to each of both ends of the condenser(C11). The barister(BR1) is connected to an output terminal of the condenser(C3) and removes an electromagnetic wave noise generating by a high speed rotation of a blower motor. The coils(L1-L7), baristers(BR2-BR7) and condensers(C4-C9) are connected to the both ends of the motor or the barister(BR1) and attenuate an electromagnetic wave being outputted. The coils(L12,L13) are used as a common mode for coupling a conductive noise and a radiative noise. The condenser(C12) and coils(L14,L15) are connected to the ground terminal of the condenser(C9) and remove an electromagnetic wave noise.
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