Abstract: A very small piezoelectric sensor capable of being mass produced includes a core, a piezoelectric layer on a surface of the core; and a conductive layer on a surface of the piezoelectric layer away from the core. The core is flexible and threadlike, the core is a first electrode of the piezoelectric sensor, and the conductive layer is a second electrode of the piezoelectric sensor. An array of such sensors allows the “skin” of a robot for example to simulate the sensitivity of hair-covered human skin. A method for making the piezoelectric sensor and an electronic device using the piezoelectric sensor are also disclosed.

Abstract: The present application relates to the field of switch technology, in particular to an electromagnetic switch, comprising a housing, a jump mechanism, movably arranged on the housing; a trip mechanism, arranged on the housing and opposite to the jump mechanism, and comprising a bridge plate located on a moving path of the jump mechanism and having multiple locked states, unlocked states, and critical states; The present application further provides another electromagnetic switch, comprising: a housing, an electromagnetic component, a contact mechanism and an armature, two spring buttons are arranged in parallel on the housing, a first spring button is internally provided with a jump structure for providing resistance at a start moment when the first spring button is pressed; in the electromagnetic switch of the present application, a jump structure is arranged on the spring button above the electromagnetic component.

Abstract: A transformer, a method for manufacturing the same and an electromagnetic device are disclosed. The transformer includes a base plate, a magnetic core, transmission wire layers and conductive parts. The base plate includes a central part defining multiple inner via holes each running through the base plate and a peripheral part defining multiple outer via holes each running through the base plate. An annular accommodating groove is defined between the central pan and the peripheral part. The magnetic core is received in the accommodating groove. The transmission wire layers may be disposed respectively on two opposite sides of the base plate. Each of the transmission wire layers includes multiple wire patterns. Multiple conductive parts are respectively disposed in the inner via holes and the outer via holes.

Abstract: The disclosure provides an inductor and a method for producing the same. The inductor includes a first core made of a first magnetic material; at least two windings, configured to be twisted with each other and embedded within the first core, each winding having a pair of terminals extending out of the first core.

Abstract: An input device includes a first part and a second part configured to move relative to each other according to an input operation, a magnetic viscous fluid whose viscosity changes according to a magnetic field, and a magnetic-field generator that generates the magnetic field applied to the magnetic viscous fluid. The second part includes a first surface and a second surface that are arranged in a direction orthogonal to a direction of relative movement between the first part and the second part. Gaps are formed between the first surface and the first part and between the second surface and the first part, and the magnetic viscous fluid is present in at least a part of the gaps.

Abstract: A switching device includes: a first terminal contact; a first fixed contact arranged at the first terminal contact; a contact bridge; a contact bridge carrier arranged at the contact bridge and having a barrier; a first movable contact arranged at the contact bridge; a second terminal contact; a second fixed contact arranged at the second terminal contact; a second movable contact arranged at the contact bridge; and a magnetic drive assembly including a coil and an armature, the armature being coupled to the contact bridge. The first fixed contact is in contact with the first movable contact in a switched-on state of the switching device. The first fixed contact is free of contact with the first movable contact in a switched-off state of the switching device. The second fixed contact is in contact with the second movable contact in the switched-on state of the switching device.

Abstract: A third through hole is formed in a crystal resonator plate of a crystal resonator to penetrate between a first main surface and a second main surface. A through electrode of the third through hole is conducted to a first excitation electrode. A seventh through hole is formed in a first sealing member of the crystal resonator to penetrate between a first main surface and a second main surface. The through electrode of the third through hole is conducted to the through electrode of the seventh through hole. The third through hole is not superimposed to the seventh through hole in plan view.

Abstract: A contact device includes a fixed contact, a movable contact, a housing, and an arc extinguishing member. The movable contact moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact is separate from fixed contact. The housing houses the fixed contact and the movable contact. The arc extinguishing member is movably disposed in the housing and discharges an arc extinguishing gas. The arc extinguishing member is disposed facing a gap between the fixed contact and the movable contact when the movable contact is in the open position.

Abstract: An exciter includes a first yoke having a first accommodation space with a first open end, a second yoke having a second accommodation space with a second open end which faces the first open end, the second open end being spaced from the first open end in a vibration direction. The exciter further includes a first magnetic member accommodated in the first accommodation space, a magnetic core and a coil accommodated in the second accommodation space, the coil wound around the magnetic core, a second magnetic member accommodated in the second accommodation space and located at outside of the coil, and a copper tube wound around the magnetic core and sandwiched between the magnetic core and the coil. The copper tube is capable of suppressing the high frequency impedance of the coil and therefore improves the high frequency performance and the reliability of the exciter.

Abstract: Systems of automatic transfer switches (ATS) are disclosed herein. One apparatus includes at least two automatic transfer switches coupled together. Each automatic transfer switches has contacts to couple a power source to a load. For each switch, an electromagnetic force biasing the contacts to each other is present if an electrical current flows through the switch. The automatic transfer switches may be on separate cassettes or on a single cassette. The power source of each switch may be the same or different.

Abstract: An electromagnetic switch for a starting device of an internal combustion engine may include a coil carrier, a coil winding, and a piston. The coil carrier may have a carrier wall which encloses a cavity. The coil winding may have a coil wire wound on a side of the carrier wall facing away from the cavity which provides a magnetic field within the cavity. The piston may be axially adjustable in the cavity. The piston may be disposed in a passive position and may be adjusted axially in a direction of a core. In the passive position, the piston and the core may define an axial gap therebetween in the cavity. The coil wire may have a first winding section and a second winding section wound in opposing directions. At least one winding of the second winding section may axially overlap the axial gap.

Abstract: Coil-based actuators for use in opening and closing the separable contacts of circuit interrupters provide increased initial velocity for opening strokes and damping at the end of opening strokes. Electronics for adjusting the current profile of current supplied to coil-based actuators additionally provide increased initial velocity for opening strokes and damping at the conclusion of opening strokes.

Abstract: Disclosed herein is a coil component that includes: a magnetic element body containing magnetic powder, the magnetic element body having first and second surfaces; a coil conductor embedded in the magnetic element body; and an external terminal connected to the coil conductor and exposed on the first surface of the magnetic element body. The second surface of the magnetic element body is free from the external terminal. The first surface is greater in surface roughness than the second surface.

Abstract: Disclosed are a transformer, and a power conversion apparatus or a photovoltaic module including the same. The transformer includes a first core including a base, a first protrusion member to protrude from the base, and a first external wall spaced apart from the first protrusion member and to surround the first protrusion member, a first winding wound in the first core, a second core including a second base, a second protrusion member to protrude from the second base, and a second external wall spaced apart from the second protrusion member and to surround the second protrusion member, a second winding wound in the second core, and a barrier rib configured to separate the first winding and the second winding from each other. Thus, ease of processing is achieved and radiation of electromagnetic noise is reduced.

Abstract: A piezoelectric transformer and a method for producing a piezoelectric transformer are disclosed. In an embodiment, the method includes manufacturing a main body having an input region having electrodes and a first piezoelectric material being alternately stacked one on top of the other. An output region includes a second piezoelectric material. The first piezoelectric material is polarized and a removable contact is fitted to an output-side end side of the main body, which end side faces away from the input region. A first electrical potential is applied to the removable contact for polarizing the second piezoelectric material.

Abstract: A micro-electrical-mechanical system (MEMS) guided wave device includes a piezoelectric layer including multiple thinned regions of different thicknesses each bounding in part a different recess, different groups of electrodes on or adjacent to different thinned regions and arranged for transduction of lateral acoustic waves of different wavelengths in the different thinned regions, and at least one bonded interface between the piezoelectric layer and a substrate. Optionally, a buffer layer may be intermediately bonded between the piezoelectric layer and the substrate. Methods of producing such devices include locally thinning a piezoelectric layer to define multiple recesses, bonding the piezoelectric layer on or over a substrate layer to cause the recesses to be bounded in part by either the substrate or an optional buffer layer, and defining multiple groups of electrodes on or over the different thinned regions.

Abstract: A surface mount inductor includes a molded body made of a composite material containing a magnetic powder, and a metal plate including a first metal plate portion that is buried in the molded body and second metal plate portions that extend from the first metal plate portion to outside the molded body. The second metal plate portions each include a first bent portion that extends from a side surface of the molded body and is bent in a direction that intersects the mounting surface and a second bent portion that is bent from the direction that intersects the mounting surface toward a side surface the molded body. The second metal plate portions extend along the molded body onto the mounting surface and form an external terminal. An internal angle of each first bent portion is formed so as to be an obtuse angle.

Abstract: A coil component is provided with a coil part in which a plurality of conductor layers and a plurality of interlayer insulating layers are alternately laminated; and a sealing resin layer that covers the coil part. The conductor layers each include a spiral pattern. The interlayer insulating layers each cover an upper surface and a side surface of the spiral pattern. The recessed part is formed in the side wall surface of the interlayer insulating layer. A part of the sealing resin layer is embedded in the recessed part.

Abstract: A low noise relay includes a main body part provided with a terminal on a first surface thereof. A cover part is coupled to the terminal and the first surface of the main body part. The cover part is electrically connected to the terminal of the main body part. A vibration reduction part is connected and electrically coupled to the cover part. The vibration reduction part is configured to support the main body part to be suspended in air. A pin part is configured such that a first side of the pin part is connected with and electrically connected to the vibration reduction part.

Abstract: A relay includes an armature, a yoke configured to be electromagnetically coupled to the armature, and a bracket-shaped clamping spring. The armature lies at least partially flat on the yoke, and a receiving depression is partly formed in the armature. The bracket-shaped clamping spring surrounds the armature and the yoke on an end face such that the armature is fixed on the yoke. The bracket-shaped clamping spring has a first clamping limb arranged in the receiving depression of the armature, and a second clamping limb lying on the yoke. The first clamping limb has an angled tab which engages elastically into a recess formed in the receiving depression of the armature.