Provided is a noise reduction device including: a conductive bar of conductive material extending through a through hole in a metal housing to the outside; a magnetic material core of magnetic material disposed at a peripheral edge of the conductive bar; a substrate attached to the conductive bar so as to be adjacent to the magnetic material core; a capacitor mounted on the substrate and having a first terminal connected to the conductive bar and a second terminal connected to an inner wall of the through hole; and a blocking unit blocking an opening of the through hole so as to affix the conductive bar to the metal housing. The magnetic material core, the substrate, and the capacitor are disposed in the through hole blocked by the blocking unit; and the conductive bar has an outer end that functions as an output terminal.

A vehicle, comprising: a frame; a passenger compartment including a selected region suitable for presence of people; an electric motor that, when in operation is associated with an undesired magnetic field emitted into the selected region; a magnetic field generator positioned in at least one of a passenger seat, a vehicle door, or the frame, wherein the magnetic field generator is configured to at least reduce the undesired magnetic field in the selected region; a magnetic field sensor configured for sensing the undesired magnetic field emitted into the selected region; and a circuit configured to: receive from the magnetic field sensor sensing data indicative of the undesired magnetic field; determine a cancelation magnetic field for at least reducing the undesired magnetic field; and direct electrical signals to the magnetic field generator for generating the cancelation magnetic field for at least reducing the undesired magnetic field.

A system for controlling the activation/deactivation of an electromagnetic shielding screen of a porthole or a protective window of an optoelectronic equipment, which includes, a radiofrequency electromagnetic sensor, with a bandwidth adapted to a cut-off band of said shielding screen corresponding to a range of electromagnetic fields to be blocked, connected to a detector-rectifier with a sensitivity higher than a minimum value of the power of an electromagnetic field to be blocked by means of said shielding screen and a device for activating/deactivating said electromagnetic shielding screen, said detector-rectifier being configured, in the presence of the electromagnetic field with a power exceeding said minimum value, to activate said device for activating/deactivating the electromagnetic shielding screen by capturing the electromagnetic energy supplied by said electromagnetic fields with a power exceeding said minimum value.

Systems, methods, and devices are described with respect to storing energy in an electric vehicle. At least one coil winding located in a wheel assembly is provided, where the wheel assembly includes a tire and a rim. At least one charge storage device located in the wheel assembly is provided. At least one electrical storage unit located within the electric vehicle is provided, where an induced charge resulting from the at least one winding passing through an electromagnetic field is stored in the at least one charge storage device and transferred to the at least one electrical storage unit via the rim of the wheel assembly. Moreover, a charging capacity for the at least one charge storage device may change to cause the electric vehicle to slow.

Methods, devices, and systems are provided to shield a passenger compartment of an electric vehicle from electromagnetic fields present during a wireless charging process. A charging system may include a power source and a charging plate wirelessly coupled to the power source, where the power source wirelessly transfers power to the charging plate. The system may further include at least one shield portion between the charging plate and a passenger compartment of the electric vehicle, where the at least one shield portion is configured to attenuate an electromagnetic field provided by the charging system.

Provided is an electromagnetic wave reduction apparatus for reducing an electromagnetic wave generated from a thermoelectric element. The electromagnetic wave reduction apparatus according to the present invention includes an electromagnetic wave sensing unit connected to a thermoelectric element and sensing an electromagnetic wave, an electromagnetic wave detecting unit detecting whether the sensed electromagnetic wave is greater than a reference value, an electromagnetic wave reduction circuit unit reducing the electromagnetic wave in response to an electromagnetic wave reduction control signal, and a circuit operation control unit generating the electromagnetic wave reduction control signal according to the detection result.

One example discloses an electromagnetic device, including: a first circuit, configured to generate a first electromagnetic field; a second circuit responsive to the first electromagnetic field; a damping circuit configured to generate a second electromagnetic field in response to a current induced by the first electromagnetic field; and wherein the second electromagnetic field reduces the second circuit's responsiveness to the first electromagnetic field.

Provided is a noise reduction device including: a conductive bar of conductive material extending through a through hole in a metal housing to the outside; a magnetic material core of magnetic material disposed at a peripheral edge of the conductive bar; a substrate attached to the conductive bar so as to be adjacent to the magnetic material core; a capacitor mounted on the substrate and having a first terminal connected to the conductive bar and a second terminal connected to an inner wall of the through hole; and a blocking unit blocking an opening of the through hole so as to affix the conductive bar to the metal housing. The magnetic material core, the substrate, and the capacitor are disposed in the through hole blocked by the blocking unit; and the conductive bar has an outer end that functions as an output terminal.

Provided is a noise reduction device including: a conductive bar of conductive material; a metal tubular portion with a through hole having the conductive bar penetrating therethrough and accommodating a magnetic material core and a substrate therein; a capacitor mounted on the substrate and having a first terminal connected to the conductive bar and a second terminal connected to an inner wall of the through hole; and a blocking unit blocking an opening of the through hole so as to affix the conductive bar with respect to the metal housing and the tubular portion. The tubular portion includes an outer peripheral surface having a threaded engagement part threadedly engaged with the metal housing; and the conductive bar has an outer end that functions as an output terminal.

As a noise-reducing shielded cable according to the present invention, provided is a shielded cable having an inverter (10), a motor (30), a cable (20) connecting the inverter and the motor with each other, a shield layer (40) covering the cable, and two ground wires (50) grounding both ends of the shield layer.