6results about How to "Reduce eddy current loss" patented technology

The application discloses a low-pressure forming high-frequency low-loss SMC magnetic powder core and a preparation method and application thereof, wherein amorphous iron-based alloy fine powder is added into iron-silicon-chromium coarse powder, different contents of nano calcium carbonate are added into the compounded magnetic powder, and then high-content epoxy resin is melted and mixed in a mixing mill to obtain a high-fluidity mixing material.After crushing, a low-pressure forming high-frequency low-loss SMC granular material is obtained, which is formed by hot pressing under low pressure, and the obtained annular magnetic powder core is annealed in a vacuum oven, so that the low-pressure high-frequency low-loss SMC magnetic powder core is obtained.Through the method, the SMC magnetic powder core with a forming pressure less than 50 MPa and a magnetic loss less than 2100 kW / m 3 under the conditions of 20 mT and 2 MHz can be obtained.

The utility model discloses a high -end inverter high -current end piece formula capacitor, including by the core, and the capacitor shell that cladding setting in the capacitor main part of core outside is constituted, the both ends of core are connected with the connecting terminal through the electrode sheet, and the connecting terminal is including the terminal main part, and is set up in the head of terminal main part, and with the plug connector of electrode sheet connection, the tail of plug connector is equipped with the card hole. The utility model solves the problem of insufficient of capacitor in prior art to the high current resistance, and the high heat release, the fast temperature rise and the short service life.

The present application relates to the technical field of electric machines, and especially relates to a stator slot wedge, a slot wedge injection mold and a stator. The stator slot wedge provided by the present application comprises a magnetic conducting part, the magnetic conducting part comprises a first insulating layer and a plurality of magnetic conducting bodies, the plurality of magnetic conducting bodies are arranged in sequence and at intervals, and each magnetic conducting body comprises a plurality of magnetic conducting sheets arranged in sequence and fixed, the plurality of magnetic conducting sheets are formed by stacking and riveting to form the magnetic conducting body, and the first insulating layer is filled between the adjacent two magnetic conducting bodies. The stator slot wedge provided by the present application avoids the magnetic conduction between the magnetic conducting bodies formed by stacking and riveting, thereby reducing the eddy current loop path, reducing the eddy current loss, and improving the efficiency of the electric machine.

The present application relates to the technical field of neutralizing device, and particularly relates to a low-power-consumption and long-life radio frequency neutralizer, which comprises a shell, one end of the shell is connected with a ceramic base and is provided with a discharge needle, a ceramic discharge chamber is arranged in the shell, a collector assembly is arranged in the ceramic discharge chamber, and a discharge needle isolator is arranged around the discharge needle; the collector assembly comprises an inner layer collector, a radial clearance is formed between the inner layer collector and the inner wall of the ceramic discharge chamber; the shell is provided with a double-layer staggered slit. The radial clearance is arranged, so that the ceramic wall deposition state and the collector electrical parameter change are decoupled, the bridging failure of the collector area is effectively inhibited, the metal sputtering particles are difficult to continuously deposit to the key insulation part along the straight path through the discharge needle isolator, the surface creepage path is prolonged, the risk is effectively reduced, the shell eddy current loss is reduced and the heat management capability is improved through the adoption of the slit type shielding shell and the double-layer staggered slit.

The utility model belongs to the technical field of proton exchange membrane fuel cells, and particularly relates to a cathode flow field plate of a proton exchange membrane fuel cell for a new energy vehicle, a cathode flow channel is arranged on the cathode flow field plate, the cathode flow channel is snake-shaped and is divided into a snake-shaped flow channel and a snake-shaped rib plate, and the snake-shaped rib plate is arranged in the snake-shaped flow channel. A plurality of snakelike rib plates are arranged among a plurality of snakelike flow channels at intervals, spoilers are arranged in the snakelike flow channels at intervals, the spoilers vertically stand in the snakelike flow channels and reduce the width of local positions of the snakelike flow channels, a circle of sealing groove capable of being provided with a sealing ring is arranged outside the snakelike flow channel on the outermost side, and the sealing ring is arranged in the sealing groove. The cathode flow field plate is internally provided with a plurality of snakelike rib plates, the snakelike rib plates are provided with drainage grooves extending along the shapes of the snakelike rib plates, each snakelike rib plate is provided with a branch drainage hole, the cathode flow field plate is internally provided with a main drainage channel communicated with the branch drainage holes, and the main drainage channel extends out of the cathode flow field plate. According to the scheme, the problems of gas leakage, water logging blockage, insufficient mass transfer and the like are solved through geometric optimization of a flow channel, innovation of a turbulent flow mechanism and improvement of a drainage system.

This application discloses a motor rotor and a motor. The motor rotor includes a rotor core, multiple permanent magnets, and multiple conductor bars. The rotor core has multiple magnetic slots, which are spaced apart circumferentially along the rotor core. Each magnetic slot has a magnetic isolation slot at both ends. The multiple permanent magnets are respectively disposed in each magnetic slot, and the multiple conductor bars are respectively disposed in each magnetic isolation slot. By providing conductor bars at both ends of the permanent magnets, this application ensures that when the motor generates high-frequency current harmonics during operation, the eddy current generation area is mainly concentrated in the conductor bars due to the combined effects of the skin effect and the proximity effect. This reduces the eddy current loss of the permanent magnets in the motor rotor, lowers the temperature of the permanent magnets under the same operating conditions, and thus reduces the risk of demagnetization in the permanent magnet synchronous motor and improves the motor efficiency. Under the same operating conditions, the amount of permanent magnets used or the grade of permanent magnets can be reduced to lower the motor cost.