5 results about "Current sheet" patented technology

The utility model relates to power electronics equipment technical field, especially a kind of strong current sheet probe of loss resistance, including sheet probe and fuse protection mechanism, the sheet probe is fixedly connected the fuse protection mechanism, the fuse protection mechanism is used to drive the sheet probe to go up and disconnect when the sheet probe short circuit and produce high temperature;The fuse protection mechanism includes sleeve one, the sleeve one is equipped with the fuse assembly for driving the sheet probe to go up and disconnect, in the utility model, when sheet probe appears short circuit and produces high temperature, fuse protection mechanism can play a role in time.Fuse block in fuse assembly will fuse under high temperature, spring loses tension after driving slide bar to go up, and then make sheet probe go up and disconnect, to form the protection to sheet probe.

The invention relates to the technical field of permanent magnet motors, and discloses a solving method for the electromagnetic design of a surface-mounted permanent magnet motor with a tooth socket and a computer readable storage medium, and the method comprises the following steps: constructing an equivalent linear motor model through embedding an equivalent current sheet; dividing sub-domains, and establishing a magnetic field equation of each sub-domain including an undetermined coefficient; constructing a coupling equation set according to a physical condition at an interface of adjacent sub-domains, and integrating the coupling equation set into a unified multi-dimensional matrix equation about an undetermined coefficient; iterative solution is carried out based on a sub-domain method and a magnetic circuit method; according to the method, an actual nonlinear stator is converted into a linear stator model, a subdomain method is adopted to carry out refined area modeling and boundary coupling, local magnetic flux distortion and disturbance such as tooth tip saturation and notch magnetic leakage are captured, a closed-loop iteration process is constructed, and the performance parameters of the permanent magnet motor are calculated. Magnetic field changes caused by saturation are dynamically corrected, and it is ensured that key dynamic performance is highly matched with physical reality.

This invention relates to a high-current-weighted current transformer with phase difference compensation. It comprises a housing, within which a current-carrying frame is housed. A ring-shaped magnetic core is fitted onto the current-carrying frame, and the ring-shaped magnetic core has a notch. A coil is wrapped around the ring-shaped magnetic core. The current-carrying frame passes through the ring-shaped magnetic core and connects to an external current source. The housing also contains a current acquisition circuit board and a pin holder. An interface pin is provided on the pin holder. One end of the interface pin is connected to the output interface of the current acquisition circuit board via a phase difference compensation module, and the other end is connected to an interface of an external testing device. This invention incorporates a thermistor. When an abnormal temperature occurs, the control mechanism of the current acquisition circuit board will activate, ensuring the safe operation of the current transformer. The phase difference compensation circuit avoids inaccurate measurement due to current disturbances, improving the measurement accuracy of the current transformer.

A sawtooth multi-anode based plasma Z-pinch optimization control device and method, the device comprising a cathode, a first anode and a second anode, wherein the second anode is a ring structure, arranged on the side of the first anode away from the cathode, and has a periodic distribution of sawtooth protrusions towards the inner edge of the cathode. The sawtooth protrusions generate local electric field distortion and field strength amplification effect in the pre-discharge stage, guiding the directional drift of electrons to the multiple sawtooth tips; after the discharge is conducted, the sawtooth tips serve as arc anchoring points, guiding the formation of multiple symmetrical discharge filaments, constructing a circumferentially uniform distributed current layer, and realizing the Z-pinch constraint of the plasma plume. The present application does not require an external magnetic field, and can improve the Z-pinch uniformity, optimize the breakdown dynamic process, and improve the impulse and thrust-power ratio of the thruster element by improving the electrode topography, and has a simple structure and no additional power consumption.

The invention discloses an image segmentation algorithm based on a novel electromagnetic storm algorithm, and aims to solve the problems that an existing method is prone to local optimum, depends on experience to adjust parameters, needs a large amount of labeled data or is poor in robustness. According to the algorithm, an original image is preprocessed, an RGB image is converted into a grey-scale image, local contrast is calculated after bilateral filtering, denoising and edge preserving, and a three-dimensional feature histogram fusing the original gray scale, the filtering gray scale and the local contrast is constructed. Then, taking the three-dimensional Shannon entropy as a target function, converting segmentation into an optimization problem of optimal threshold combination search, and performing interplanetary magnetic field factor population generation, opposite learning and elite file construction initialization; and in the main cycle, precise optimization is realized through adaptive weight control magnetoelectric spiral local search, magnetic layer top current sheet global exploration and a particle collision strategy, and finally, an optimal threshold value is output and a segmentation result is generated.