An electronic component includes a multilayer body constituted by insulator layers that are laminated in a laminating direction, a primary coil including one or more primary coil conductor layers, a secondary coil including one or more secondary coil conductor layers, and a tertiary coil including one or more tertiary coil conductor layers. The primary coil conductor layers, the secondary coil conductor layers, and the tertiary coil conductor layers are arrayed in the laminating direction. The primary coil, the secondary coil, and tertiary coil constitute a common mode filter, and intervals between two among the one or more primary coil conductor layers, the one or more secondary coil conductor layers, and the one or more tertiary coil conductor layers, every two of those being adjacent to each other in the laminating direction, are not even.

Architectures or techniques are presented that can improve operation of permanent magnet (PM) motors, which can be part of a compressor or other heating, ventilation, and air conditioning (HVAC) device. Such improvements can be achieved by integration of inductive filtering into the motor assembly. A higher overall inductance can reduce current ripple and can further result in a lower total harmonic distortion, reduced power loss, and reduced heat generated. For example a first architecture can include a ferromagnetic core element in the PM motor that can cause a non-torque-producing reluctance path to the shaft. A second architecture can integrate a signal filter, which is customarily external, into a housing of the PM motor. Such can significant reduce costs and provide other advantages. A third architecture can couple an inductor (e.g., of the signal filter) to the shaft. Rotation of the shaft can thus serve to provide additional cooling for the inductor.

A filter for an electric machine is disclosed. The filter has an inductor, which is a coil, and a capacitor. The coil has multiple windings, and each turn of the windings includes at least one conductor which is designed to be flat. By virtue of the flat conductor of the coil, the capacitance of the filter is thus formed in the coil itself In the process, the surface of one conductor is arranged opposite the surface of an adjacent conductor.

A radio-frequency architecture can include a first circuit configured to support a first frequency range, and a second circuit configured to support a second frequency range. The first circuit can be further configured to provide an impedance at or near a short circuit impedance for a signal in the second frequency range, the second circuit can be further configured to provide an impedance at or near a short circuit impedance for a signal in the first frequency range. The architecture can further include a coupling circuit having a common node and configured to couple the common node to the first circuit and to couple the common node to the second circuit. The coupling circuit can include a resonator such that the signal in the second frequency range is sufficiently excluded from the first circuit, and the signal in the first frequency range is sufficiently excluded from the second circuit.

Architectures or techniques are presented that can improve operation of permanent magnet (PM) motors, which can be part of a compressor or other heating, ventilation, and air conditioning (HVAC) device. Such improvements can be achieved by integration of inductive filtering into the motor assembly. For example a first architecture can include a ferromagnetic core element in the PM motor that can cause a non-torque-producing reluctance path to the shaft. A second architecture can integrate a signal filter, which is customarily external, into a housing of the PM motor. A third architecture can couple an inductor (e.g., of the signal filter) to the shaft.

In some embodiments, an architecture can include a first group of filters each configured to support a band such that a first frequency range covers the respective bands, and a second group of one or more filters each configured to support a band such that a second frequency range covers the respective one or more bands. Each filter of the first group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the second group, and each filter of the second group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the first group. The filters of the first and second groups can be implemented as one or more multiplexers. The architecture can further include a coupling circuit having a common node and configured to couple the common node to the one or more multiplexers through a first path and a second path. The coupling circuit can be further configured such that the impedance provided by each filter of the first group for the signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that the impedance provided by each filter of the second group for the signal in each band of the first group results in the signal being sufficiently excluded from the second path.

Disclosed herein is a common mode filter that includes: a plurality of conductor layers stacked with an insulating layer interposed therebetween, the plurality of conductor layers including at least first and second conductor layers; and first, second, third, and fourth terminal electrodes. The first conductor layer has a spiral-shaped first coil pattern having an outer peripheral end connected to the first terminal electrode and an inner peripheral end connected to the third terminal electrode. The second conductor layer has a spiral-shaped second coil pattern having an outer peripheral end connected to the second terminal electrode and an inner peripheral end connected to the fourth terminal electrode. The outermost turn of the first coil pattern has a first non-overlap section that is wound at least by turn without overlapping the outermost turn of the second coil pattern.

A coil component includes a housing including first and second main surfaces facing each other, and four side surfaces that join the main surfaces, a first coil inside the housing, and a second coil inside the housing with an opening thereof overlapping an opening of the first coil when viewed in a direction of the first main surface. A first extended line extends in a direction toward the second main surface along a side of the first side surface. A second extended line extends in the direction toward the second main surface along a side of the second side surface.

An inductive-capacitive filter includes a first insulating-conductive strip wound around a winding axis, where the first insulating-conductive strip includes a first conductive strip joined with a first insulating strip. An inductive-capacitive filter assembly includes a first and a second insulating-conductive strip concentrically wound around a winding axis, the first insulating-conductive strip including a first conductive strip joined with a first insulating strip, and the second insulating-conductive strip including a second conductive strip joined with a second insulating strip.

Exemplary embodiments are disclosed of circuits for integrating and/or combining electromagnetic interference (EMI) filters with power lines without using capacitors. In exemplary embodiments, a circuit comprises a common mode inductor including first and second inductors. The first inductor is configured to be operable for providing a first impedance along a live wire of the circuit. The second inductor is configured to be operable for providing a second impedance along a neutral wire of the circuit. The circuit further includes a third inductor configured to be operable for providing a third impedance along a ground wire of the circuit.