The invention comprises a method, including the steps of: providing an inductor core and longitudinally joining a first electrical turn section to a second electrical turn section to form at least part of an electrical turn of a winding about the inductor core and optionally including at least one of the steps of: (1) additive manufacturing, casting, stamping from metal stock, cutting material, and/or bending metal to form the first electrical turn section and/or (2) welding and/or mechanically joining the first electrical turn section to the second electrical turn section.

In a wireless charging system, a transmitter coil of a wireless charger device and a receiver coil of a portable electronic device can operate at either of two different operating frequencies. The low frequency can be in a range from about 300 kHz to about 400 kHz, and the high frequency can be in a range from about 1 MHz to about 2 MHz. To provide efficient charging at both frequencies, the transmitter and receiver coils can be formed from a compound, or multi-stranded, wire.

A transmitter coil module for inclusion in an accessory device can include a transmitter coil capable of operating at either of two different operating frequencies. The low frequency can be in a range from about 300 kHz to about 400 kHz, and the high frequency can be in a range from about 1 MHz to about 2 MHz. To provide efficient charging at both frequencies, the transmitter coil can be formed from a compound, or multi-stranded, wire. A control module can also be provided that is external to the transmitter coil module The control module can include, for example, a printed circuit board having control circuitry to generate alternating current in the transmitter coil at either the high frequency or the low frequency.

A coil component, adopted to be mounted on an electronic device, includes: an element body part; a coil fixed to the element body part and constituted by a wound conductive wire; lead wires that are each extended from the conductive wire and led out from the coil, and whose tip parts are each disposed a bottom face, which is a mounting face, of the element body part; and terminal parts that are each constituted by the tip part and a metal member that is joined to the tip part on the bottom face, and also has an opening at a position overlapping the tip part in a direction intersecting the bottom face.

A planar transformer including a planar first primary coil; a planar first secondary coil inductively coupled with the first primary coil; and a transformer magnetic core for guiding a magnetic flux generated by the first primary coil and/or the first secondary coil around at least a first opening of the transformer magnetic core. The first primary coil and the first secondary coil are coiled around the transformer magnetic core through the first opening. The first primary coil and the first secondary coil are arranged on a first plane. The embodiments further refer to a battery charger including such a planar transformer.

An inductor device includes a first trace, a second trace, an input/output terminal, a center-tapped terminal, and an interlaced connection portion. The first trace is located on a first layer. The second is located on the first layer. The input/output terminal is disposed at a first side of the inductor device. The center-tapped terminal is disposed at a second side of the inductor device. The interlaced connection portion is disposed at a third side or a fourth side of the inductor device, and coupled to the first trace or the second trace. No interlaced connection structure is disposed along a connection line between the input/output terminal and the center-tapped terminal.

The invention comprises a method for forming an inductor, comprising the steps of: providing an inductor core and fastening at least ten sections of a winding together to form a winding, the winding comprising a formed wound shape about the inductor core. Optionally and preferably the step of fastening repeats steps of joining a member of a first set of winding parts to an element of a second set of winding parts, where the two sets of winding parts have different cast or formed shapes.

This disclosure relates to the inductive charging of portable electronic devices. In particular, a charging assembly is disclosed that allows a portable electronic device to be charged in multiple orientations with respect to a charging device. The charging assembly includes two or more separate inductive receiving coils. The inductive receiving coils can be arranged orthogonally with respect to one another by wrapping one or more secondary receiving coils around an antenna. By orienting the receiving coils orthogonally with respect to one another, the likelihood of at least one of the receiving coils being aligned with a charging field emitted by a charging device increases substantially.

A surface-mount inductor includes an element assembly having a core, a coil, and a magnetic material; and a pair of external terminals on a mounting surface of the element assembly. The core has a base portion and a columnar portion on an upper surface of the base portion. The coil is disposed on the base portion, and has a wound portion on the columnar portion, and a pair of extended portions extended from the wound portion. The base portion has at least one ridge portion at which the upper surface and a side surface are in linear contact with each other. The pair of extended portions are each disposed such that a flat surface portion connected to a flat surface portion disposed at an inner side portion of a conductive wire located at an outer peripheral portion of the wound portion is close to the ridge portion.

A primary coil former for an ignition coil has a winding carrier surface configured for a primary coil wound thereon. Two primary winding stops limit the winding carrier surface at first and second axial ends of the carrier surface, respectively. Two holders are formed at the first axial end, each configured for holding one end of a winding wire. Two deflection domes are formed at the second axial end, one of the domes configured for guiding a winding wire back to the winding carrier surface for a clockwise winding and the other dome configured for guiding a winding wire back to the winding carrier surface for a counterclockwise winding. A groove in the winding carrier surface receives a winding wire which leads from one of the ends of the winding carrier surface up to a gap between the two deflection domes at the opposite end of the winding carrier surface.