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AssigneeJohnson Electric S.A.
InventorsQing Bin LUO, Chi Wai LAI, Xiao Lin REN, Gui Hong TIAN, Xin Peng WEI
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A motor includes motor terminals for connecting with an external power supply and an internal circuit connected to the motor terminals. The motor further includes a RF filter. The RF filter includes a conductive wire coiled in either a helical manner or a spiral manner. Terminals of the conductive wire at opposite axial ends of the coil are connected to a corresponding one of the motor terminals and the internal circuit, respectively. The intensity of the electromagnetic waves radiated from most parts of the conductive wire of the RF filter is attenuated by reflected electromagnetic waves from other parts of the conductive wire. Therefore, the intensity of the electromagnetic wave radiated from the motor is greatly reduced. A RF filter for the motor is also provided.
A RF filter comprising a conductive wire, the conductive wire coiled on a hypothetical cylindrical surface in a helical manner to form a hollow cylindrical coil, opposite terminals of the conductive wire at opposite axial ends of the cylindrical coil forming an input end and an output end of the RF filter.
A RF filter comprising a conductive wire, the conductive wire coiled in a plane in a spiral manner to form a coil, opposite terminals of the conductive wire at inner and outer radial ends of the coil forming an input end and an output end of the RF filter.
A motor comprising:
Dependencies are inferred from the claim text.