| 摘要 |
PURPOSE: A device for blocking the electromagnetic wave and noise of a wiper motor for a vehicle is provided to prevent the malfunction of a wiper motor and other electrical devices by blocking the harmful electromagnetic wave and noise generated from the wiper motor. CONSTITUTION: A coil(L7) is installed on a grounding terminal(GND) of a wiper motor(M). A choke coil(L9) and general coils(L10,L11) are serially connected to an output terminal of an automatic stop position detector and a positive terminal(B+) of a battery. A condenser(C5) is installed between both terminals of the choke coil. A condenser(C11) and a choke coil(L8) are serially installed between the connecting point of the general coils and the grounding terminal. Many condensers(C6-C10) are parallel installed between the connecting points of the choke coil and the general coils and the connecting points of the condenser(C11) and the choke coil(L8). One side of a coil for a high speed is grounded through the condenser(C1), and a through-typed condenser(C3), a general coil(L2), a choke coil(L4), a general coil(L6), and a bead core(BC1) are installed by serial connection. One side of a coil for a high speed is ground through the condenser(C2), and a through-typed condenser(C4), a general coil(L3), a choke coil(L5), a general coil(L6), and a bead core(BC2) are installed by serial connection. The external parts of the through-typed condensers are grounded by a general coil(L1).
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