摘要:
In a novel process for the synthesis of cinnamic esters or substituted cinnamic esters, carboxylic esters are reacted, by condensation, with benzaldehyde or substituted benzaldehydes, respectively, in the presence of a solid with basic properties.
摘要:
The invention relates to an electric motor, in particular an electronically commutated electric motor. The electric motor has a stator, a rotor and a housing, which accommodates at least the stator and the rotor in a cavity. The electric motor also has a power output stage, which is connected to the stator and is designed to energize the stator in order to induce a rotating magnetic field. The power output stage has at least one power semiconductor with a thermal contact area, wherein the thermal contact area is thermally conductively connected to the housing, with the result that heat generated in the power semiconductor can be dissipated to the housing. According to the invention, the housing has a housing cup, which at least partially surrounds the cavity and is preferably thermally conductive and which has a cup wall, wherein the cup wall has a mating contact area corresponding to the thermal contact area.
摘要:
The invention relates to a circuit arrangement comprising an electric and/or electronic circuit unit (10) which has a circuit carrier (14), on which at least one electric and/or electronic component (12) is arranged, and at least one connecting zone comprising a contact unit for electrically contacting the electric and/or electronic circuit unit (10) with other electric and/or electronic components. The invention also relates to a corresponding controller for a motor vehicle. The circuit carrier (14) is designed as at least one lead frame assembly having individual strip conductors (14.11, 14.12), the strip conductors (14.11, 14.12) being arranged in at least two different planes (14.3, 14.4).
摘要:
An optical imaging system serving for imaging a pattern arranged in an object plane of the imaging system into an image plane of the imaging system with the aid of electromagnetic radiation from a wavelength range around a main wavelength λ0 has a multiplicity of mirrors. Each mirror has a mirror surface having a reflective layer arrangement having a sequence of individual layers.
摘要:
EUV-mirror having a substrate (S) and a layer arrangement that includes plural layer subsystems (P″, P′″) each consisting of a periodic sequence of at least two periods (P2, P3) of individual layers. The periods (P2, P3) include two individual layers composed of different materials for a high refractive index layer (H″, H′″) and a low refractive index layer (L″, L′″) and have within each layer subsystem (P″, P′″) a constant thickness (d2, d3) that deviates from that of the periods of an adjacent layer subsystem. In one alternative, the layer subsystem (P″) second most distant from the substrate has a period sequence (P2) such that the first high refractive index layer (H′″) of the layer subsystem (P′″) most distant from the substrate directly succeeds the last high refractive index layer (H″) of the layer subsystem (P″) second most distant from the substrate
摘要:
The invention relates to an electric motor, in particular an electronically commutated electric motor. The electric motor has a stator, a rotor and a housing, which accommodates at least the stator and the rotor in a cavity. The electric motor also has a power output stage, which is connected to the stator and is designed to energize the stator in order to induce a rotating magnetic field. The power output stage has at least one power semiconductor with a thermal contact area, wherein the thermal contact area is thermally conductively connected to the housing, with the result that heat generated in the power semiconductor can be dissipated to the housing. According to the invention, the housing has a housing cup, which at least partially surrounds the cavity and is preferably thermally conductive and which has a cup wall, wherein the cup wall has a mating contact area corresponding to the thermal contact area.
摘要:
Smart-card connector (1) having a contact element support (11) within which contact elements are supported. A cover (12) is pivotably mounted at the contact element support (11). A cam (50) is provided at said cover (12) so as to bearing means (48) of the cover out of the pivot location at the contact element support in case the cover is improperly operated.
摘要:
A contacting apparatus comprising: a contact element support and fixedly mounted in said contact element support at least one contact element, wherein A) said contact element comprises: a contact cusp portion, a mounting section adapted to be enclosed by said contacting element support, and a contacting portion, said mounting section forming a step adapted to be located within said contact element support; and B) said contact element support being designed such, that it encloses said contact element only in locations where a load is generated by a contacting force exerted onto said contact cusp portion.
摘要:
The present invention provides for a SIM card reader with a contact support comprising contact elements with a cove for receiving a SIM card comprising two spaced longitudinal side edges and two spaced front and rear edges, with preferably two bearing apparatusses on the contact support and cover for enabling a pivoting motion between the cover and the contact support.
摘要:
A mirror (1a; 1a′; 1b; 1b′; 1c; 1c′) for the EUV wavelength range and having a substrate (S) and a layer arrangement, wherein the layer arrangement includes at least one surface layer system (P′″) consisting of a periodic sequence of at least two periods (P3) of individual layers, wherein the periods (P3) include two individual layers composed of different materials for a high refractive index layer (H′″) and a low refractive index layer (L′″), wherein the layer arrangement includes at least one surface protecting layer (SPL, Lp) or at least one surface protecting layer system (SPLS) having a thickness of greater than 20 nm, and preferably greater than 50 nm.