286results about How to "Improve electrical strength" patented technology

An electric motor includes one or more separate coil sets arranged to produce a magnetic field of the motor. The electric motor also includes a plurality of control devices coupled to respective sub-sets of coils for current control. A similar arrangement is proposed for a generator. A coil mounting system for an electric motor or generator includes one or more coil teeth for windably receiving a coil for the motor and a back portion for attachably receiving a plurality of the coil teeth. A traction control system and method for a vehicle having a plurality of wheels independently powered by a respective motor. A suspension control system and method for a vehicle having a plurality of wheels, each wheel being mounted on a suspension arm of the vehicle and being independently powered by a respective motor.

A portable therapeutic field generator device (10) generates a reduced magnetic field component for a relatively large electric field by virtue that adjacent conductive tracks in a radiating element (40, 50) conduct electrical current in opposing directions. The device (10) includes a processor (12) that, in response to a control algorithm stored in memory (14), supplies a pulse wave (22) to a circuit containing the radiating element (40, 50). The pulse establishes generation of a base heartbeat reference having a frequency around a nominal heart rate. At periodic times, the base heart beat reference is supplemented by mutually exclusive periods of alpha wave, theta wave and delta wave generation (or other selected frequencies below about 200 Hz) based on selected brainwave frequencies for these waves, with the pulses having a duration generally corresponding to that ascribed to neuron depolarisation pulses. The device (10) cycles through multiple cycles (88) and, dependent upon the effect that is desired, may see delta wave frequencies follow theta wave frequencies that follow alpha wave frequencies. Delays may exist between transitions between the generated waves, with delta wave generation occurring no later than sixty minutes from commencement of alpha wave production for a mode that induces sleep. Delta waves production has, typically, a duration that is twice that of either the alpha or theta wave production. A second mode of operation sees longer pulse times for higher frequencies—between about 100 Hz and 500 Hz—associated with muscle stimulation.

The invention discloses a manufacturing method of ultra-high voltage insulation cooked mica paper, and aims to solve the problem that the mica paper prepared by the existing raw powder technique is not applicable to large-size power equipment. The method disclosed by the invention comprises the following steps: screening the mica raw material, calcining at high temperature, screening, dipping, making cooked mica pulp, manufacturing paper with the pulp, drying and the like. The mica paper produced by the method disclosed by the invention has the characteristics of high electric strength and high tensile strength.

The invention relates to a nano modified epoxy vacuum pressure impregnation resin, which comprises the following components in percentage by weight: 36 to 45 percent of bisphenol A epoxy resin, 5 to 20 percent of low-viscosity epoxy active diluent with the viscosity of 3-200mps, 40 to 50 percent of liquid anhydride, 1 to 8 percent of nanopowder with the grain size of 1-100nm, 0.2 to 2 percent of dispersing agent, 0.1 to 2 percent of silane coupling agent, and 0.1 to 1 percent of defoaming agent. Compared with the common epoxy vacuum pressure impregnation resin, the nano modified epoxy vacuum pressure impregnation resin has the advantages that the thermal conductivity and corona resistant performance are obviously improved, the heat resistance and electric strength are improved and the nano modified epoxy vacuum pressure impregnation resin can meet requirements in the fields such as high-power variable frequency motors and low temperature superconducting motors.

An electric motor includes one or more separate coil sets arranged to produce a magnetic field of the motor. The electric motor also includes a plurality of control devices coupled to respective sub-sets of coils for current control. A similar arrangement is proposed for a generator. A coil mounting system for an electric motor or generator includes one or more coil teeth for windably receiving a coil for the motor and a back portion for attachably receiving a plurality of the coil teeth. A traction control system and method for a vehicle having a plurality of wheels independently powered by a respective motor. A suspension control system and method for a vehicle having a plurality of wheels, each wheel being mounted on a suspension arm of the vehicle and being independently powered by a respective motor.

The invention provides a preparation method for a polymide film with the low thermal expansion coefficient. The method comprises the following steps that 1, pyromellitic anhydride and ursol are placed into a dimethylacetamide solvent for condensation polymerization to obtain a polyamide acid glue solution A; 2, 2, 3',3,4'- biphenyltetracarboxylic dianhydride and 4,4'-diaminodiphenyl ether are placed into the dimethylacetamide solvent for condensation polymerization to obtain a polyamide acid glue solution B; 3, the polyamide acid glue solution A and the polyamide acid glue solution B are mixed for a high-speed stirring reaction to obtain a polyamide acid glue solution C; 4, the tape casting technology is adopted on the polyamide acid glue solution C to obtain a film, and finally the film is fed into an imidization furnace to be processed to obtain the polymide film with the low thermal expansion coefficient. The CTE of the polymide film with the low thermal expansion coefficient is 15-17 ppm / K, and the polymide film further has the advantages of being high in strength, stability, electrical strength and the like.

The invention relates to a full-dull colorful insulation polyester membrane, which is prepared by matt film polyester chips, color master batches, and master batches containing silicon oxide, while the three materials are mass rationed as 20-30 accounts of matt film polyester chip, 2-6 accounts of color master batches, and 2-6 accounts of the master batches containing silicon oxide. The invention has the advantages that 1, the product is hard to lose color and be polluted in the insulation applications as electron, wire and electric fields, the membrane is easily to be sliced, with high electric strength and good insulation, 2, the membrane has flat and smooth surface, 3, the invention can prepare insulation polyester membranes with different colors.

The invention provides an electric connector. The electric connector comprises an insulating base, a solder terminal fixedly arranged in the insulating base and an elastic plate comprising a free end and a fixed end, wherein the free end always keeps the trend of pressing against the solder terminal; the fixed end is fixedly connected with the solder terminal; and the bottom end of a button connected with the upper part of the base is pressed against the free end of the elastic plate. The electric connector is characterized in that the solder terminal comprises a current carrying main board, and a support plate pressed against the bottom of the fixed end extends out of the lower part of the current carrying main board and the upper edge of the current carrying main board is bended outwards to form a capped edge pressed against the top of the free end; the current carrying main board, the support plate and the capped edge of the solder terminal form a C-shaped cross section; and the bottom of the solder terminal is also provided with two solder legs which are one-piece formed, arranged on both sides of the support plate respectively and staggered front and back. Compared with the prior art, the electric connector has the advantages that the current carrying area of the solder terminal is larger, and the conductivity of the solder terminal is improved; and because the solder legs are staggered front and back, the creepage distance is increased, the withstand voltage value of the electric connector is improved, and the electric strength of the product is further improved.

The invention relates to a manufacturing process of enamelled copper strap wires, and particularly relates to a manufacturing method of corona-resistant polyimide film sintered enamelled copper strap wires. The manufacturing method comprises the following steps of: processing a copper conductor into a copper strap wire; making the copper strap wire to a 200-grade polyester-imine / polyamide-imide compound type enamelled copper strap wire; and covering a corona-resistant polyimide film on the enamelled copper strap wire and then heating, baking and sintering the enamelled copper strap wire. The manufacturing method combines an enameling process and a glass-coating process, overcomes the limitation of the conventional process, makes up single performance of the existing process, and well combines the enameling process and the glass-coating process; and the product has high corona resistance strength and reaches a high temperature resistance level.

This specification discloses a semiconductor device having higher electric strength.The semiconductor device disclosed in this specification has a semiconductor element region, a peripheral termination region, a peripheral electrode, an insulating film, and an intermediate electrode. A semiconductor element is formed within the semiconductor element region. The peripheral termination region is formed around the semiconductor element region and formed of a single conductive type semiconductor. The semiconductor element region and the peripheral termination region are exposed at one surface of a semiconductor substrate. The peripheral electrode is formed on a surface of the peripheral termination region and along a circumference of the semiconductor substrate. The insulating film is formed on the surface of the peripheral termination region and between the semiconductor element region and the peripheral electrode. The intermediate electrode is formed on the insulating film. A thickness of the insulating film under the intermediate electrode is larger at a side of the peripheral electrode than at a side of the semiconductor element region.

The invention discloses a metallized membrane capacitor assembly, which belongs to a capacitor used in the pulse power field and solves the problem that the traditional high-voltage metallized membrane capacitor is readily explosive when used in atmospheric or low pressure environment. The metallized membrane capacitor assembly comprises capacitor cores, DMD (Digital Micromirror Device) insulating papers, a high-voltage extraction electrode and a low-voltage extraction electrode, wherein M capacitor cores achieve the purpose of connecting capacitors in parallel to form capacitor stacks; N capacitor stacks achieve the purpose of connecting capacitors in series to form capacitor assemblies; the DMD insulating papers are arranged among the capacitor stacks; and the capacitor assemblies, the DMD insulation papers, the high-voltage extraction electrode and the low-voltage extraction electrode are integrally encapsulated by polyurethane pouring sealant to form the metallized membrane capacitor assembly. The metallized membrane capacitor assembly has higher energy storage density and electric strength, good insulation reliability in atmospheric or low pressure environment, and better mechanical performance and longer service life under a heavy-current discharging condition.

The invention relates to a metallized film for a thin film capacitor, comprising a dielectric layer and a metallized film layer, the metallized film layer and the dielectric layer are combined with each other, and a misaligned edge is left at one end of the dielectric layer. The metallized film layer is in a triangular shape; the thicker side of the metallized film layer is located at the metallized edge after the metallized film layer is combined with the dielectric layer. The present invention also relates to a method for making a metallized film for a film capacitor of the present invention, comprising the following steps: coating a metal material on a dielectric layer, leaving a wrong edge at one end of the dielectric layer to form a metallized film layer, and The metallized film layer is in a triangular shape, wherein the thicker side of the metallized film layer is located at the metallized edge after the metallized film layer is combined with the dielectric layer. The processing technology of the invention is simple, and the contact resistance of the thin film capacitor made by it is small, so that the characteristics of the product are good.

The invention discloses a single-line constant-current to constant-voltage electric energy conversion circuit. The circuit comprises a current bypass, a CC / CV main circuit and a MOS pipe driving circuit. The CC / CV main circuit and the current bypass are connected in parallel and then are connected in series in the single-line constant current output channel. The current bypass comprises a NMOS pipe Q1 and a resistor R1. The CC / CV main circuit comprises a diode D1, capacitors C1and C2, a resistor R2 and a voltage-regulator tube D3. An anode of the diode D1 is connected to an input terminal of the current bypass. A cathode of the diode D1 is connected to an output terminal of the current bypass through a capacitor C1. The resistor R2, the capacitor C2 and the voltage-regulator tube D3 form an output branch. The output branch provides power for a MOS pipe driving circuit and the driving circuit is used for providing a trigger pulse for the NMOS pipe Q1. The single-line constant-current to constant-voltage electric energy conversion circuit is easy to carry out. A conception is ingenious and the circuit is especially suitable for being applied to a single line power supply occasion.