96 results about "Inductor" patented technology

A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.

There is provided a multilayered inductor, including: an inductor body; a coil part formed on the inductor body and having a conductive circuit and a conductive via; and external electrodes formed on both end surfaces of the inductor body, wherein the inductor body includes 65 to 95 wt % of a metallic magnetic material and 5 to 35 wt % of an organic material.

The invention discloses a production process of an ultra-crystallite cutting iron core for a split mutual inductor. The production process comprises the following steps: a, placing an ultra-crystallite belt material iron core on a winding machine for winding into an iron core, and fixing by spot welding; b, thermally heating the iron core in a gradual temperature rising way, namely, heating to 380 DEG C and preserving heat for 10-50 minutes, heating to 450 DEG C and preserving heat for 10-50 minutes, and heating to 560-600 DEG C and preserving heat for 30-60 minutes; c, rapidly cooling by adopting air cooling till the temperature of the iron core is lowered to 300 DEG C, and controlling the time period from the end of the heat preservation to a moment when the temperature of the iron core falls below 300 DEG C to be within 45 minutes; d, reshaping the iron core, loading into a mold, putting into prepared paint together for soaking in vacuum, and hardening; e, cutting the cured iron core along a symmetrical center line, ensuring the flatness and smoothness of a notch, and eliminating scattering and burrs of the iron core; and f, testing and encapsulating. The process disclosed by the invention has the advantages that the method is simple, a thermal treatment process is improved, a paint soaking step is added, a low-cost and high-performance iron core can be realized, and a very remarkable effect is achieved.

The invention discloses a main circuit of a three-phase four-wire DC/AC convertor and a control method thereof. The main circuit comprises two power semiconductor switches G1 and G2, two diodes D1 and D2, a capacitance branch and an inductor L1, wherein the two power semiconductor switches G1 and G2 are connected with a bridge arm with midpoint drifting control in series from top to bottom; the two diodes D1 and D2 are connected with power semiconductor switches in parallel reversedly; the capacitance branch is connected with the bridge arm with the midpoint drifting control in parallel; the capacitance branch is formed by two series capacitors C1 and C2; and one end of the inductor L1 is connected with the point of common coupling (PCC) of the two semiconductor switches G1 and G2, and the other end of the inductor L1 is connected with the PCC of the two series capacitors C1 and C2, as well as a midcourt line in the three-phase four-wire convertor is led out, namely an N line. In the invention, the bridge arm in a midpoint control circuit and three bridges of a three-phase convertor can be controlled respectively and independently, thus realizing decoupling control of a three-phase four-bridge arm convertor. Under the condition of three phase imbalance, simple voltage current feedback control or proportional-integral (PI) control is used to control the midpoint, so that the midpoint drifting control can be finished.

The invention discloses a multi-terminal flexible DC network longitudinal protection method and system based on current limiting inductor voltage polarity, which comprises the following steps: collecting voltage values of current limiting inductor at both ends of a DC line in real time; detecting voltage values of current limiting inductor at both ends of the DC line in real time; Voltage gradientalgorithm is used to deal with the voltage, and then to detect whether there is a fault; After the protection is started, the current-limiting inductor voltage in the sampling data window is integrated, and the current-limiting inductor voltage polarity is judged by comparing the integrated value S with the set threshold value. The current limiting inductor voltage polarity R at both ends of theline is compared, and if both polarities are positive, the fault is judged to be in-area fault, otherwise, the fault is judged to be out-of-area fault. The protection principle and algorithm of the invention are simple, and do not need mathematical tools such as fast Fourier transform, wavelet transform and the like for frequency division or traveling wave capture, and also do not need data synchronization at both ends of the line, and are easy to realize. The data window of the protection criterion is short, and no additional fault pole identification step is needed, so the protection criterion is fast.

The invention relates to the technology of a power source and an integrated circuit, in particular to a DC-DC converter with the output voltages capable of being adjusted quickly. The DC-DC converter comprises a driving circuit, a PMOS tube MP, an NMOS tube MN, a PWM comparator, an EA amplifier, an inductor L, a capacitor C, a resistor R and a power source Vin. The DC-DC converter is characterized in that a calculating amplifier is further included, the driving circuit, the PMOS tube MP, the NMOS tube MN, the PWM comparator, the EA amplifier, the inductor L, the capacitor C, the resistor R and the power source Vin form a traditional DC-DC converter, and the positive input end and the output end of the calculating amplifier are connected to be used as one end, connected to the capacitor C, of a bumper. The DC-DC converter has the advantages of being simple in structure, easy to achieve, low in power consumption, and capable of achieving quick adjusting of the output voltages of the DC-DC converter only by small domain area. The DC-DC converter is particularly suitable for DC-DC converters.

Improved multi-sectional bobbin designs described herein define a channel suitable to accommodate a portion of the wire that transits from prior winding section to the next, wherein opposing walls of the channel so defined separate the transiting portion of the wire from both prior and next winding sections through a substantial entirety of the wires descent from an upper winding layer in the prior section to a lower winding layer in the next.

In a D.C. to D.C. converter, an input voltage is received via an inductor at an input terminal and stored onto a capacitor of an integrator. A first switch is coupled between the input terminal and a reference terminal such as ground and thereby fluxes the inductor. The input voltage stored on the capacitor falls at a rate determined by the integrator circuit and an initial value of the input voltage. After a time duration, the first switch becomes nonconductive. Current flows from the inductor through a diode to an output terminal until a second switch across the diode is made conductive. Stored voltage on the capacitor of the integrator increases in response to the second switch being conductive. The stored voltage on the capacitor is continuously compared with a reference voltage. The second switch is made nonconductive when the stored voltage on the capacitor exceeds the reference voltage.

The invention belongs to the technical field of electrical energy exchange, and relates to a wide range voltage adjustable buck-boost single-stage inverter circuit device. The device adopts the structure that one end of switch tube is electrically connected with a positive pole of a direct current supply, and the other end of the switch tube is electrically connected with one end of an inductor; one end of the inductor is electrically connected with the negative pole of the direct current supply; the positive pole of an electrochemical capacitor and the inductor are commonly connected with the negative pole of the direct current supply so as to form a local loop with a three-phase voltage type bridge-type inverter circuit which comprises six bridge arms, each bridge arm is composed of an isolated gate bipolar triode transistor and an antiparallel diode; the output end of the three-phase voltage type bridge-type inverter circuit are led out by three groups of mutually corresponding bridge arms; the three-phase voltage type bridge-type inverter circuit is the output end of the whole device and used for receiving the DC electric energy and outputting AC electric energy. The device has the advantages of good safety, less passive elements of the inverter circuit, small size, light weight, environmental protection, and wide voltage adjustable range.

The invention relates to a three-port DC/DC converter for high-power charging and belongs to the technical field of automobile driving and control. The three-port DC/DC converter solves the problem that a traditional non-isolated buck topology cannot freely and simultaneously realize high-power charging and the control of the free charge-discharge requirements of a battery. An input capacitor is connected in parallel with a voltage source; the positive pole of the voltage source is connected to the drain of a switching transistor Q1; the source of the switching transistor Q1 is connected to the cathode of a diode D1; the anode of the diode D1 is connected to the negative pole of the voltage source; the source of a switching transistor Q2 is connected to the cathode of the diode D1; the drain of the switching transistor Q2 is connected to the cathode of a diode D2; the anode of the diode D2 is connected to the positive pole of a battery; the negative pole of the battery is connected tothe anode of the diode D1; one end of an inductor L1 is connected to the source of the switching transistor Q2; the other end of the inductor L1 is connected to the drain of a switching transistor Q3;the source of the switching transistor Q3 is connected to the anode of a diode D3; the cathode of the diode D3 is connected to the positive pole of the battery; one end of an output capacitor is connected to the drain of the switching transistor Q3; and the other end of the output capacitor is connected to the negative pole of the battery. The three-port DC/DC converter is suitable for automobiledriving and control.

The invention provides stamping production equipment. The stamping production equipment comprises a material conveying frame, a temper mill, a punching machine, a stamping mould, a feeding machine, a stacking machine, a control cabinet and inductors, and a steel plate roll material is fixedly arranged on the material conveying frame; the temper mill is arranged behind the material conveying frame, the inductors comprise a front inductor and a rear inductor, the front inductor is fixedly arranged in front of the temper mill, the rear inductor is fixedly arranged behind the temper mill, the punching machine is fixedly arranged behind the rear inductor, the stamping mould is fixedly arranged inside the punching machine, and the feeding machine is fixedly arranged on the side face of the punching machine. The stacking machine and the control cabinet are fixedly arranged behind the punching machine. According to the stamping production equipment and the stamping production technology, simultaneous or sequential work of all stations can be achieved through the control cabinet of a control terminal of a control system, expenditures of labor cost is greatly reduced, the yield of a product is effectively improved, the produced finished product can be protected against damage, it is also ensured that the whole set of equipment is not easily damaged, and compared with abroad precise equipment, the whole set of equipment is easy to maintain and is easily popularized in a large-scale mode.

The invention relates to a drinking cup fast becoming cool and slowly becoming cold. The drinking cup comprises a cup body and a base, wherein the cup body is arranged on a supporting table of the base through a clamping mouth, the cup body and the base are detachable, a cup body inner wall, a thermal insulating layer and a cup body outer wall are sequentially arranged on the cup body from the interior to the exterior, heat absorbing solution is placed between the cup body inner wall and the thermal insulating layer, the base comprises a displayer, a switch, a controller, a temperature inductor, a draught fan, a heating rod and a power supply, the displayer and the switch are arranged on the outer side of the base, the controller, the temperature inducer, the draught fan and a draught fan support are all arranged inside the base, the draught fan is fixedly arranged at the bottom part of the base through the draught fan support, and the temperature inductor is arranged under the supporting table of the base. The cup body can be independently used. The drinking cup is simple, detachable and convenient to carry, the temperature of a liquid substance in the cup body can be fast lowered, the drinking cup has a heating and thermal insulating function, the cup body can be independently used, and the drinking cup is convenient and economic.

The voltage controlled oscillator comprises an amplifier and an oscillating system comprising an inductor and a first and second variable capacitor connected in series, each having a capacitance varying according to its control voltage. The capacitance of one of the variable capacitors varies in the same direction as its control voltage and the capacitance of the other variable capacitor varies in the opposite direction to its control voltage. A capacitor having a fixed capacitance can be connected in series or in parallel with the first and second variable capacitors. The first and second variable capacitors are preferably formed by transistors, respectively of PMOS and NMOS type. An additional series of additional first and second variable capacitors can be connected in parallel with the first and second variable capacitors.

The invention relates to the field of power management, and provides a Buck type high power factor converter based on an integrated controller. In order to achieve high power factors, according to the technical scheme, the Buck type high power factor converter based on the integrated controller comprises a peripheral circuit, a rectifying bridge is composed of four diodes, and a partial voltage structure which is formed by two resistors which are in series connection is connected to the rear portion of the rectifying bridge in parallel; the positive output end of an AC input power source is connected to the negative electrode of one diode, the negative output end of the AC input power source is connected with an MOS switch through a current detecting resistor, and the other end of the MOS switch is connected with the positive electrode of the corresponding diode. The positive electrodes of the diodes are connected with one end of a voltage reduction inductor. An output load is connected with a difference partial voltage structure in parallel. Middle nodes of the two resistors are connected to the base electrode of a P-type audion, a high level end is connected to the emitting electrode of a secondary audion after passing through an emitting electrode resistor, a collector electrode is connected to the ground after passing through a collector electrode resistor, and a node between the collector electrode and the resistors outputs voltage feedback signals. The Buck type high power factor converter based on the integrated controller is mainly suitable for power source management.

A fluorescent lamp holder combination device includes a main lamp holder and an auxiliary lamp holder set, which is provided with an auxiliary lamp holder. The main lamp holder is internally configured with a multifunction ballast, which is electrically connected to a conducting portion. Each of the conducting portions is electrically connected to a connecting portion of each of the auxiliary lamp holders by means of a set of conducting cables, thereby enabling parallel connection between each of the auxiliary lamp holders using the single multifunction ballast, and achieving the effectiveness to enable the single multifunction ballast to provide stable rectification and energy saving for the auxiliary lamp holders. Furthermore, a starting capacitor and current-limiting inductor can be disposed within each of the auxiliary lamp holders, thereby reducing use-cost of the set of conducting cables while facilitating maintenance of the starting capacitors and the current-limiting inductors.

The invention provides a wireless power transmission system, and the system comprises a transmitting end and a receiving end; the transmitting end comprises a DC/AC inverter circuit, a first resonantinductor, a first capacitor and a first compensation inductor which are connected in series; the receiving end comprises an AC/DC rectifying circuit, a second resonant inductor, a second capacitor anda second compensation inductor which are connected in series; the electric energy of the transmitting end is transmitted to the receiving end through electromagnetic induction between the first resonance inductor and the second resonance inductor, and the AC/DC rectifying circuit is used for providing the rectified electric energy to a load of the receiving end. The scheme can be applied to a wireless power supply scene or a wireless charging scene.

The invention discloses a single-phase photovoltaic grid-connected inverter with low common-mode voltage. The single-phase photovoltaic grid-connected inverter is formed by a photovoltaic array module, six same switching tubes, two power diodes and two filtering inductors, wherein a drain electrode of a first power switching tube is connected with an anode of the photovoltaic array module; a source electrode of the first power switching tube is connected with the anode of a second power diode; a cathode of a first power diode is connected with the drain electrode of a third power switching tube; the source electrode of the third power switching tube is connected with the cathode of the photovoltaic array module; the drain electrode of a second power switching tube is connected with the anode of the photovoltaic array module; the source electrode of a fourth power switching tube is connected with the cathode of the photovoltaic array module; the cathode of the second power diode is connected with the anode of the first power diode; and a second filtering inductor is connected with a power grid cathode end and the drain electrodes of the switching tubes. According to the single-phase photovoltaic grid-connected inverter disclosed by the invention, common-mode leakage current is effectively inhibited, the current fluctuation is easily reduced, the whole conversion efficiency is improved and the safety of a grid-connected inverter system is improved; and the single-phase photovoltaic grid-connected inverter is relatively simple in circuit structure and is easy to realize.

The invention discloses an electric energy monitoring and early warning system based on 5G and a modified GCN graph neural network, and the system comprises an intelligent electric meter and a serverterminal. The intelligent electric meter collects the current value of a flowing line through a mutual inductor, and the intelligent electric meter is internally provided with a 5G module, and transmits the collected current information to the server terminal; the server side gathers the current data of the factory, the production workshop, the production line and the key equipment, and performs comprehensive analysis in combination with the factory production data. According to the invention, the mutual inductor is adopted to monitor the value of the current flowing through the electric wire,and the monitored data is sent to the cloud server by using the 5G network for the first time, so that the problem of factory wiring is avoided, the problem of mutual isolation of links such as factory power utilization measurement and monitoring is solved, and centralized monitoring and centralized management of factory power utilization monitoring are realized.

The present invention relates to a single-phase electricity energy meter based on the internet, belongs to the electric power system field. The present invention provides a power supply for a singlechip and an electricity energy measuring chip through the power supply chip, a clock chip provides the clock impulse for a memory chip and the singlechip. The electricity energy measuring chip and a voltage mutual inductor collect signals from an outer power grid. The present invention reads and processes information through the singlechip, stores the information through a singlechip bus, then outputs the information to a relay and a display through a univerall pipe foot of the singlechip. Finally the singlechip is connected with the internet connected with a PC through an electromagnetic isolation transformer and a connector. When the electricity energy meter cannot work, the communication can be resumed by testing the infrared communication chip. The electricity energy meter can improve the service quality, can realize the online management, and can improve the work efficiency.

The invention provides an epoxy potting inductor and a fabrication method thereof. The epoxy potting inductor comprises an annular iron core, an inductance coil, an unsintered tape, epoxy resin and a housing, wherein the inductance coil is wound on the annular iron core; the unsintered tape is wound on the annular iron core and coats the inductance coil; the annular iron core is accommodated into the housing; and the epoxy resin is added between the inner wall of the housing and the outer wall of the unsintered tape. According to the epoxy potting inductor, the wound inductance coil and the annular iron core are potted in a shell after being coated with the unsintered tape, so that important parameters of distributed capacitance, insertion loss, a Q value and the like of the inductance coil before and after being potted can be kept constant; interference to the parameters of the inductance coil caused by stress and dielectric loss of potting epoxy resin is avoided; and the energy efficiency, the waveform and the EMC (electromagnetic compatibility) of a complete machine meet related requirements.

The invention provides a duplexer which is characterized by comprising a transmitting filter which is connected between a transmitting end and an antenna end and comprises a series resonator and a parallel resonator which are connected in a trapezoid form; and a reception filter, wherein the receiving filter is connected between the receiving end and the antenna end and comprises a series resonator and a parallel resonator which are connected in a trapezoid mode, wherein the LWR resonator and the parasitic inductor are connected to a series branch of the transmitting end, the receiving end orthe antenna end in series, and the parasitic inductor is close to one side of the transmitting end, the receiving end or the antenna end. According to the present invention, the LWR Lamb wave resonator is introduced into the design of the filter and the duplexer, so that the parasitic inductance exists on the signal connecting line, the parasitic inductance can be counteracted through the series connection of the LWR, and the matching and the insertion loss are improved.

The invention provides a power system of an electric vehicle and a battery heating method. The system comprises a battery pack, a battery heater, a battery manager, a power distributing box, a motor, a motor controller and an isolated inductor. The battery heater is connected with the battery pack, the battery manager is connected with the battery pack and the battery heater and is used for controlling the battery heater for heating the battery pack when the temperature of the battery pack is smaller than a first temperature threshold value and the remaining power is larger than a power threshold value. The power distributing box is used for distributing the voltage outputted by the battery pack. The motor controller is connected with the motor and the power distributing box and is provided with a first input end, a second input end and a pre-charge capacitor connected between the first input end and the second input end. The isolated inductor is required to match with the pre-charge capacitor. The power system can realize heating, limit of usage of the electric vehicle in low-temperature environment is reduced greatly, heating efficiency is high, cost is lower, and practicability is high. The invention further provides an electric vehicle.

The invention relates to an overspeed inductor for a mine car, which mainly comprises a base plate, a sliding core, a round sphere and a shell, and is characterized in that the base plate is fixed with the shell, the sliding core can be moved in the shell freely along an axis direction, the round sphere is in contact with a wedge slot on the sliding core and is connected with an elastic element, the other end of the elastic element is fixed on a bolt, the bolt is arranged on the shell, a cover plate is connected with the shell through a screw, and a seal ring is arranged in the cover plate. According to the invention, the speed of a rotary machine is measured by a purely mechanical structure, the structure is simple, an extra power supply and electronic elements are not needed, the maintenance is convenient, and the sensitivity is high.

The invention provides a DC boost converter control method. The control method comprises the following steps: input voltage, intermediate voltage, output voltage and current flowing through an inductor are detected; according to the numerical value of the intermediate voltage and the numerical value of the output voltage, expected current is calculated; according to the numerical value of the input voltage, the numerical value of the current flowing through the inductor and the numerical value of the expected current, the duty cycle of a power transistor is calculated; and according to the duty cycle of the power transistor, on or off of the power transistor is controlled. the DC boost converter control method has the advantages that a double-closed loop control structure is adopted, voltage closed loop control is added to the existing current closed loop, adaptively-adjusted PID control with a weight coefficient is used to realize the adaptive and self-organizing ability of the controller, and stable output of voltage is ensured; and an integral control unit with fast error convergence and strong disturbance robustness is adopted at the same time, and quick and stable tracking onthe expected current by the output current is realized.

The present invention relates to a method for fabricating multilayer circuit board with inner film passive sub-unit which is formed from resistor, capacitor or inductor. A passive sub-unit such as risistance film or capacity film should be formed first on one face of a conductive foil when a resistor or a capacitor is embedded and a soft magnetic film should be formed on one face of conductive foil when the inductor is formed, of which the capacity film will be covered with a conductive layer acting as an electrode. Furthermore, the conductive foil together with passive unit will be applied into the fabrication of multilayer circuit board and the electrode, screw type of coil and circuit pattern of the passive sub-unit will be formed on the conductive foil simultaneously as another soft magnetic film also can be formed at the most top of the screw type of coil in order to increase properties of the inductor.