TDK Corp | Date: 2017-05-03
A switching power supply unit (1, 1A, 1B, 1C) includes input terminals (T1, T2), output terminals (T3, T4), first to third primary windings (311, 321, 331) and first to third secondary windings (312, 322, 332), a switching circuit (2, 2A, 2B, 2C), a rectifying smoothing circuit (4, 4A, 4C, 4D, 4E), and a driver (5). In the switching circuit (2, 2A, 2B, 2C), first and second switching devices (S1, S2), third and fourth switching devices (S3, S4), and first and second capacitors (C51, C52), coupled in series to one another, are disposed in parallel between the input terminals (T1, T2). In the rectifying smoothing circuit (4, 4A, 4C, 4D, 4E), first to third arms, each having two of rectifying devices (411, 412, 421, 422, 431, 432) disposed in series, are disposed in parallel between the output terminals (T3, T4), the first secondary winding (312) is coupled between the first and the second arms to form an H-bridge coupling, the second and the third secondary windings (322, 332) are coupled between the second and the third arms to form an H-bridge coupling, and a choke coil (Lch) is disposed between the first to the third arms and an output capacitor (Cout).
TDK Corp | Date: 2017-01-25
A method of providing a coating on a conductor. The coating has a first layer containing palladium and a second layer containing gold from the conductor side. The first layer has an inner layer on the conductor side and an outer layer arranged nearer to the second layer than the inner layer, and the outer layer has a higher phosphorus concentration than the inner layer.
TDK Corp | Date: 2017-05-10
Disclosed herein is a magnetic sensor including: a first core made of a first soft magnetic material, the first core having first and second connection surfaces; a second core made of a second soft magnetic material different from the first soft magnetic material, the second core having a third connection surface facing the first connection surface and a fourth connection surface facing the second connection surface; and a coil wound around the first core between the first connection surface and the second connection surface. The first core reaches magnetic saturation at a higher magnetic field intensity than that of the second core, and the second core has a higher magnetic permeability than that of the first core.
TDK Corp | Date: 2017-02-01
In object to provide a unit of piezoelectric element having a preferable bending strength and preferably used as a part of a driving unit, a unit of piezoelectric element comprising: a multilayer piezoelectric element, having internal electrodes laminated having a piezoelectric body layer in-between and a pair of external electrodes formed on side surfaces extending along laminating direction and electrically connected to the internal electrodes, a wiring part connected to the external electrodes via a solder part, wherein a solder is solidified, a resin part, joining one end surface in the laminating direction of the multilayer piezoelectric element and a mounting surface of a connection member placed to face the one end surface, wherein the resin part is continuous from the one end surface and the mounting surface to the solder part; and the resin part covers the solder part, is provided.
TDK Corp | Date: 2016-11-04
An R-T-B based sintered magnet includes R_(2)T_(14)B crystal grains. A grain boundary formed by the two or more adjacent R_(2)T_(14)B crystal grains includes an RNOC concentrated part having higher concentrations of R, N, O, and C than those in the R_(2)T_(14)B crystal grains. R of the RNOC concentrated part includes Y. A ratio of Y atom to R atom in the RNOC concentrated part is 0.65 or more and 1.00 or less. A ratio of O atom to R atom in the RNOC concentrated part is more than 0 and 0.20 or less. A ratio of N atom to R atom in the RNOC concentrated part is 0.03 or more and 0.15 or less.
TDK Corp | Date: 2017-01-30
An anti-tilt electromagnetic motor is provided, including a frame, a support base, a contact assembly, a drive assembly, and an elastic assembly. The support base is arranged movably relative to the frame along an axis. The contact assembly is disposed between the frame and the support base and directly contacts the frame and the support base. The drive assembly is configured to drive the support base to move. The elastic assembly is configured to provide a pre-loading force so as to enable the contact assembly to be compressed by the frame and the support base.
TDK Corp | Date: 2016-10-17
An electromagnetic driving device is provided, which includes a movable member, a stationary member, a driving magnet, a driving coil, a conductive layer, and an external terminal. The movable member and the stationary member are arranged separate from each other along a main axis. The driving magnet is positioned on the movable member. The driving coils are arranged corresponding to the driving magnet and are disposed in the stationary member. The conductive layer is electrically connected to the driving coils and is disposed in the stationary member. The external terminal is exposed by the fixed member and electrically connected to the conductive layer. The thickness of the external terminal is different from the thickness of the conductive layer.
TDK Corp | Date: 2016-10-12
A lens driving module is provided which includes a base and an electrical terminal to electrically connect to an external circuit. The electrical terminal includes a first segment, a second segment, and a middle segment positioned between the first segment and the second segment. The electrical terminal is inserted into the base, and the first segment and the second segment are exposed to the exterior via a light emitting side surface, and the middle segment is exposed to the exterior via a light receiving side surface.
TDK Corp | Date: 2017-02-02
An optical image anti-shake device, defined with an X-axis, a Y-axis and a Z-axis, includes a casing, a movable member and a base. A suspension mechanism furnished inside the optical image anti-shake device includes a movable-member support and a suspension module. A first surface of the movable-member support is connected to the movable member. The suspension module suspends the movable-member support together with the movable member inside an inner compartment formed between the casing and the base.
TDK Corp | Date: 2016-11-10
A positive electrode active material includes: a lithium complex oxide expressed by chemical formula (1); a highly thermal conductive compound; and graphene or multilayer graphene. Li_(x)M1_(y)M2_(1-y)O_(2)(1) In the formula (1), M1 is at least one metal selected from Ni, Co, and Mn, M2 is at least one metal selected from the group consisting of Al, Fe, Ti, Cr, Mg, Cu, Ga, Zn, Sn, B, V, Ca, and Sr, and x and y are numbers such that 0.05x1.2 and 0.3y1.