5results about How to "Reduce distributed capacitance" patented technology

Provided are a high-frequency dynamic response type LVDT displacement sensor and a displacement measurement method thereof, and belong to the field of precision displacement measurement. The sensor comprises a coil framework, a primary coil, a secondary coil, a core, a shell and a signal processing circuit. The primary coil and the secondary coil adopt a layered and segmented winding structure, an insulating layer is arranged between the layers, and a gap is arranged between the segments, so as to reduce the distributed capacitance and the eddy current loss; the core adopts a nanocrystalline alloy material and has high magnetic permeability and low loss; the signal processing circuit comprises a high-frequency excitation source of 10 kHz to 20 kHz, a lock-in amplifier and an LMS adaptive filtering module, and is used for suppressing noise. The measurement method comprises generating a high-frequency excitation, converting displacement into a differential signal, lock-in demodulation, adaptive filtering, temperature compensation and digital output. The dynamic response frequency of the present application is greater than or equal to 10 kHz, the response time is less than 1 ms, the precision is better than ±0.1% F.S., and the present application is suitable for high-frequency dynamic displacement measurement of aircraft control surfaces, engine vibration monitoring and the like.

This utility model relates to the field of current transformer technology and discloses an environmentally friendly anti-interference current transformer, including two current transformer housings. Current transformer assemblies are disposed inside the two current transformer housings, and bases are installed on the bottom surfaces of both current transformer housings. This environmentally friendly anti-interference current transformer facilitates disassembly of the current transformer housings by setting a fixing plate on the upper surface of the housings and connecting them with bolts, while also using a snap-fit ​​mechanism between the two housings. This facilitates the recycling of the internal components. During use, the secondary winding coil is spirally and uniformly wound, reducing the distributed capacitance and inductance of the winding and enhancing the overall anti-interference capability. As the cable passes through the middle area of ​​the current transformer housing, it is guided by a limiting rope to be as close as possible to the center of the iron core, reducing the problem of uneven magnetic field distribution within the iron core caused by eccentricity and improving the anti-interference capability.

The present application relates to the field of household appliances, in particular to a kind of ignition needle assembly (6) for gas stove (1), it is configured to be suitable for igniting gas, ignition needle assembly (6) includes ignition needle main body (61), it is configured to be suitable for generating electric spark;Wire assembly (62) includes conducting wire (622) and the insulating layer (621) of cladding conducting wire (622), wire assembly (62) respectively with ignition needle main body (61) and the electrically conductive connection of igniter (7) of gas stove (1), to conduct the current generated by igniter (7) to ignition needle main body (61);And interval (64), it is configured to be suitable for wire assembly (62) and the electric conductor structure of gas stove (1) is spaced apart.The present application also relates to a kind of gas stove (1).By the present application, the distributed capacitance between wire assembly and electric conductor structure, for example, bottom shell can be reduced, the reliability and success rate of ignition are ensured and user satisfaction is improved.

The invention relates to a high-frequency transformer distributed capacitance calculation and common-mode noise optimization method and device. The method and device mainly change the layer number of a primary side winding. After the number of layers of the primary side winding is changed, the height of the primary side winding and the potential difference between the primary side winding and the secondary side winding can be changed. Through a unified variable method, an expression for constructing distributed capacitance between the primary side and the secondary side of the high-frequency transformer about the number of primary side winding layers is deduced, and then a strategy for suppressing common-mode noise of the high-frequency transformer is obtained. By changing the number of layers of the primary side winding, the distributed capacitance between the primary side and the secondary side can be reduced on the basis of not increasing other anti-phase windings and shielding layers, so that the effect of suppressing the common-mode noise of the high-frequency transformer is achieved. The damage of common-mode noise transmitted by a high-frequency transformer in a power converter system is solved, common-mode noise signals received by an input cable end and an output cable end are greatly weakened, and electromagnetic radiation interference of cable common-mode noise of the power converter system is remarkably weakened.

This invention discloses a novel inductor coil and circuit. The novel inductor coil includes at least one pair of inductor units. Each pair of inductor units consists of a first inductor and a second inductor with identical structures. The first inductor is connected in series at one end of the load, and the second inductor is connected in series at the other end of the load. The center-to-center distance between the first and second inductors is D, where D ≥ 0. The first and second inductors are symmetrically distributed along the centerline of D / 2. Both the first and second inductors are frameless arc-shaped hollow coils with an arc θ satisfying 0 < θ ≤ π and curvature k2 ≥ 0; when θ = π, D > 0. The inductor provided by this invention does not form a common-mode inductor, which can effectively reduce electromagnetic interference and external electromagnetic radiation. It can also be used on the main power path, and its heat dissipation performance is improved, with flexible adjustment of inductor parameters.