59 results about "Inductance" patented technology

A magnetic part having a first iron core wound with a winding constituting a transformer and an inductance component of a parallel coil and a second iron core wound with an inductance component of a series coil, in which a ratio of the dimensions of the first iron core and the second iron core are in accordance with their respective winding densities.

The invention discloses a sensor for monitoring metal abrasive particles in oil liquid on line. The sensor is a mutual inductance sensor and comprises an exciting coil and an inducting coil, wherein an oil path through which the oil liquid can pass is arranged in the center of a framework made of a magnetic inert material; the exciting coil and the inducting coil are coaxially wound on the framework; the inducing coil is positioned between the exciting coil and the framework; the axial length of the inducting coil is 1/4-1/2 of that of the exciting coil; and the axial center points of the inducting coil and the exciting coil are superposed. The sensor realizes zero compensation and adjustment by adopting a parallel measurement structure and is simple in structure, high in sensitivity, high in linearity and high in interference resistance. The sensor applied to on-line monitoring for the metal abrasive particles in the oil liquid is convenient to operate, high in instantaneity, high in measurement precision and accurate and reliable in monitored result and can be widely applied to military and civil fields and used for monitoring the pollution degree and the abrasion to the oil liquid of lubricating systems of mechanical equipment such as various air planes, naval vessels and automobiles and monitoring and diagnosing faults of the lubricating systems of the mechanical equipment to avoid safety accidents.

A display device includes a first substrate, a first electrode provided on the first substrate, an insulation layer provided on the first electrode, a second electrode provided on the insulation layer, a cavity partition surrounding the second electrode with an interval therebetween, a second substrate provided on the cavity partition, and a droplet of a coloring liquid sealed in the cavity partition. In the display device, a third electrode for promoting restoration of the droplet of a coloring liquid to a spherical shape is provided. In the display device, the insulation layer includes a insulator film and a low surface energy film; the insulator film assumes a specific inductive capacity of three or more and a thickness of 10 nm to 100 nm; and the low surface energy film assumes a thickness of 100 nm or less.

The invention relates to a series coupling inductance high-voltage direct current breaker and a control method thereof. The breaker comprises a change-over switch, a switching circuit and an energy consumption device which are connected in series. The change-over switch adopts a mechanical switch, the switching circuit adopts a coupling circuit, and the energy consumption device adopts a lightning arrester. The high-voltage direct current breaker is connected with a control circuit, when a failure happens, the mechanical switch detects failure current, and transfers the failure current to the coupling circuit. The failure current charges a capacitor in the coupling circuit, flows over current change of a conductance L1, generates change current which is opposite to the failure current in direction and flows through a conductance L2. The failure current and the change current are overlaid, and the overlaid current makes a zero crossing point on a main circuit of the mechanical switch to cut off the mechanical switch. Voltage on two ends of the capacitor reaches operation voltage of the lighting arrester so that the lightning arrester acts and energy is released from the lightning arrester. The series coupling inductance high-voltage direct current breaker can meet requirements of quick cutting off of the failure current, can realize non-arc cutting-off of the mechanical switch, and the control method is simple and easy to operate, and complete in function.

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 electrode for high-voltage in-situ impedance spectroscopy measurement of the present invention and its preparation method and application belong to the technical field of in-situ measurement of electrical quantities under high-voltage conditions. The electrode consists of an aluminum oxide protective layer (3) deposited on the surface of the diamond anvil (2) and a metal film electrode (1); the metal film electrode (1) is circular in the center of the anvil surface of the diamond anvil (2), Copper wire (5) is bonded to the metal film electrode (1) on the side of the diamond anvil (2); the metal spacer (4) is used as another electrode, forming an axisymmetric electrode together with the metal film electrode (1) system. Electrodes are prepared by magnetron sputtering, molybdenum coating, aluminum oxide deposition, photolithography and chemical corrosion. The invention solves the problems of electrode fixing and sample cavity insulation, and can ignore the influence of the parasitic capacitance and inductance of the system on the measurement results, making it possible to measure the material impedance spectrum in situ with the diamond anvil under high pressure.

A resonant gate drive circuit provides efficient switching of, for example, MOSFETs. However, the operation of resonant gate drive circuits often does not allow applications where high switching frequencies are required. According to the invention, a precharging of the inductance of the resonant gate drive circuit is performed. This allows highly efficient and fast MOSFET operation.

A rotational sensing system is adaptable to sensing motor rotation based on eddy current sensing. An axial target surface is incorporated with the motor rotor, and includes one or more conductive target segment(s). An inductive sensor is mounted adjacent the axial target surface, and includes one or more inductive sense coil(s), such that rotor rotation rotates the target segment(s) laterally under the sense coil(s). An inductance-to-digital converter (IDC) drives sensor excitation current to project a magnetic sensing field toward the rotating axial target surface. Sensor response is characterized by successive sensor phase cycles that cycle between L_MIN in which a sense coil is aligned with a target segment, and L_MAX in which the sense coil is misaligned. The number of sensor phase cycles in a rotor rotation cycle corresponds to the number of target segments. The IDC converts sensor response measurements from successive sensor phase cycles into rotational data.

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.

A driving apparatus for a plasma display panel with a pulse generator to supply an alternating pulse to an electrode, and an energy recovering unit to store charges from a discharge cell when the pulse voltage decreases or to output the stored charges to the discharge cell when the pulse voltage increases. The energy recovering unit has a magnetic switch, coupled with the discharge cell and an energy storage capacitor, with variable inductance to control transient time when the pulse transitions from a first voltage to a second voltage. The transient time is based on LC resonance of the magnetic switch inductance and panel capacitance, and can be reduced to improve resolution of the panel. Insulated gate bipolar transistors can be used with the magnetic switches to reduce power loss during switching and in the on-state, and can sustain high voltages necessary for high concentration Xe discharge gas.

The invention discloses a method for controlling a non-radial displacement transducer of a multi-phase and single-winding bearingless motor. The control for torque and suspension of the multi-phase and single-winding bearingless motor is finished in two planes which are orthorhombic mutually; and a multi-phase inverter is utilized to simultaneously introduce two groups of currents with different phase differences to the motor, thus respectively realizing the torque drive and the rotor suspension of the motor. With respect to the multi-phase and single-winding bearingless motor with the phase number of more than or equal to 7, displacement signals are extracted from another plane different from a torque plane and a suspension plane according to the the characteristics of MDOF (multiple degree of freedom) of the multi-phase motor by utilizing the relationship between mutual inductance and eccentricity among different planes in an eccentric state, so as to research the non-displacement transducer control technology of the motors. In the method, the multi-control DOF of the multi-phase and single-winding bearingless motor is utilized to extract radial displacement information of a rotor under fundamental frequency, thus reducing the system cost, shortening the radial length of a system and improving the system reliability.

The invention discloses a derailment monitoring system of endless-rope continuous towing vehicles and a monitoring method of the derailment monitoring system. An inductance type proximity switch of the derailment monitoring system is installed on a shuttle car; the shuttle car is provided with an emitter; the emitter is connected with the inductance type proximity switch; the emitter emits detection signals of the inductance type proximity switch; a router is installed at one side of a tunnel; the router receives the detection signals emitted by the emitter and transmits the detection signals to a receiver; the receiver is connected with a PLC processor through a bus; the PLC processor is connected with a display screen; the PLC is also connected with a relay; and the relay is connected with a control switch of a winch. With the monitoring method of the derailment monitoring system adopted, the position of the shuttle car can be positioned in real time, and the operation state of the shuttle car can be judged, and if a sensor predicts derailment, alarm signals can be generated, and the motor of the winch can be locked, and therefore, major accidents can be avoided, and efficient and safe operation of a coal mine auxiliary transportation system can be ensured; and derailment prediction information and shuttle car position information can be combined together, so that fault points can be found timely, and therefore, maintenance and repair can be performed.

A system for processing plastic feed material includes a machine having a barrel and a screw that rotates in a repetitive cycle in the barrel. An induction winding encircles and extends along an outer surface of the barrel. A control system includes a controller that determines a duty cycle referenced to a length of the machine cycle in response to an error between a desired barrel temperature and a current barrel temperature. The controller electrically connects the power supply to the induction winding at least once during each cycle for a period whose length corresponds to the duty cycle.

The invention provides a power proportion regulating device and method and an inductance-coupling plasma generator, belonging to the field of power regulation, which solves the problem of high cost of the traditional power proportion regulating technology. The power proportion regulating device provided by the invention comprises an input end, a plurality of in-parallel output ends, a power regulating unit and a feedback controlling unit, wherein the feedback controlling unit is used for controlling the power regulating unit so as to enable output powers of the plurality of output ends to satisfy with a preset proportional relation. The inductance-coupling plasma generator provided by the invention comprises the power proportion regulating device. The power proportion regulating method provided by the invention comprises the step of controlling the power regulating unit according to the preset proportional relation between actual output powers and the output powers of the output ends.

The invention relates to a shock absorption device, and in particular to an electric damping shock absorber. The electric damping shock absorber disclosed by the invention comprises a moving structural member, a static structural member and an elastic component, wherein the elastic component is arranged between the moving structural member and the static structural member; the electromagnetic static member of a linear electric mechanism is arranged on the static structural member, the electromagnetic moving member of the linear electric mechanism is arranged on the moving structural member, and the electromagnetic static member is in electromagnetic fit with the electromagnetic moving member; or the electromagnetic static member of a rotary electric mechanism is arranged on the static structural member, the electromagnetic moving member of the rotary electric mechanism is driven by the moving structural member, and the electromagnetic static member is in electromagnetic fit with the electromagnetic moving member. According to the electric damping shock absorber disclosed by the invention, redundant shock is reduced by virtue of damping generated by the interaction of the electromagnetic static member and the electromagnetic moving member, thus a better shock absorption is achieved; a part of energy in shock can also be recovered in a structure provided with an inductive unclosed coil, thus a great effect is also achieved in the aspect of energy saving.

A low temperature poly-silicon thin film element, method of making poly-silicon thin film by direct deposition at low temperature, and the inductively-coupled plasma chemical vapor deposition equipment utilized, wherein the poly-silicon material is induced to crystallize into a poly-silicon thin film at low temperature by means of high density plasma and substrate bias voltage. Furthermore, the atom structure of the poly-silicon thin film is aligned in regular arrangement by making use of the induction layer having optimal orientation and lattice constant close to that of the silicon, thus raising the crystallization quality of the poly-silicon thin film and reducing the thickness of the incubation layer.

A measurement-while-drilling servo-actuator for use in mud-pulse telemetry, which determines linear position of a poppet valve therein without counting revolutions of a stepper motor which positions said poppet valve. A sensor senses a magnetic field intensity value, or an inductance value, which is proportional to the position of the poppet valve relative to the sensor. A look-up table of reference outputs corresponding to known position of the poppet valve is used to determine the position of the poppet valve. A method of determining a position of a poppet valve in a mud pulser is further disclosed.

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.

A transponder and a method for wireless data transmission is provided. The transponder comprises an input circuit with input terminals for connecting an antenna coil for data transmission to a base station by means of inductive coupling, a first controllable switching means, at least one resistor, which is looped in series with the first controllable switching means between the input terminals of the input circuit, and a controller which is designed in such a way that it connects through the first switching means as soon as a voltage applied at the input terminals falls below a first settable threshold value, and again interrupts it as soon as the voltage applied at the input terminals for a settable duration is above the first settable threshold value and/or above a second settable threshold value.

The invention discloses a boosted circuit and a signal output method. The boosted circuit comprises a boosted module, a boosted control module, a ripple signal generation module and a voltage given signal generation module. The boosted control module carries out sampling on an inductance current signal of the boosted module and an output voltage signal. According to a ripple signal, a voltage given signal, the voltage signal and the inductance current signal, wherein the voltage signal and the inductance current signal are acquired through sampling, a driving pulse signal is generated. The boosted module completes a boost change to an input voltage signal under the control of the driving pulse signal and provides direct voltage signal output possessing a ripple component. Because the ripple signal generation module is newly added, the boosted module outputs a voltage signal possessing the ripple component. A backward-stage direct current/direct current link directly generates a jitter frequency effect because the input voltage signal possessing the ripple component so that an electromagnetic interference problem of a power supply system is alleviated.

The invention discloses automatic processing equipment for an axle hole. The equipment comprises a frame, a power head, a workpiece clamp, a hydraulic station and an electric control cabinet, and is characterized in that a hydraulic system trunk, a hydraulic charge branch, a hydraulic blocking branch, a hydraulic pushing branch, a hydraulic compaction branch and a hydraulic feed branch, wherein the hydraulic system trunk consists of an oil tank, a filter net, a variable pump, a one-way valve, a stop valve, an oil inlet pipeline and an oil return pipeline; the branches consist of a three-position four-way electromagnetic slide valve, a one-way throttle valve, a two-way oil pressure latching valve, a pressure relay, a charge cylinder, a blocking cylinder, a pushing cylinder, a compaction cylinder and a power head cylinder; the branches and the trunk form a complete hydraulic system of the automatic processing equipment for the axle hole; the frame is fixedly connected with the electric control cabinet, a downhill type sliding rack, a workpiece V-shaped positioning block, hydraulic moving components and drill tools; and each moving component is correspondingly provided with an inductance approach switch.

The invention discloses a wide-range inductive frequency-modulation type displacement measurement device and a method. The device comprises a shell, a spiral coil, a measuring rod, a pipe body and a data processing module, wherein the spiral coil is arranged on the rear section of the pipe body in a sleeving manner; the data processing module is arranged on the shell; the front-end part of the measuring rod is formed by butting n sections of magnetic cores and can stretch into the pipe body; the magnetic conductivity of the ith magnetic core is 1.5-2 times that of the magnetic conductivity of the (i+1)th section of the magnetic core; i and n refer to integers; n is more than or equal to 2; i is equal to n-1; the length of each section of the magnetic core is smaller than the length of the spiral coil, so that two ends of a single section of the magnetic core stretch in the length range of the spiral coil; and the lengths of the tube body and the measuring rod are larger than the length of the spiral coil. The metal spiral coil with mature and stable process is used, the mode of continuously measuring by virtue of the multi-section measuring rod is adopted, the precision is guaranteed, the range can be widened, and the device is low in cost and easy to implement and can be widely applied to wide-range displacement deformation monitoring in the fields of civil engineering, geological disasters and industries.

A frequency tunable filter and an associated apparatus are provided, wherein the frequency tunable filter may include a plurality of ports including an input port and an output port, and may further include an inductor-capacitor (LC) resonator, a switching unit that is coupled between the LC resonator and a ground terminal of the frequency tunable filter, and a resonance adjustment unit that is coupled between the LC resonator and the ground terminal. For example, the LC resonator may include a first terminal coupled to each of the input port and the output port, and may further include a second terminal, the switching unit may selectively provide a conduction path between the second terminal of the LC resonator and the ground terminal, and the resonance adjustment unit may selectively change a resonance characteristic of the LC resonator. According to the present invention, the overall performance of an electronic device is guaranteed.

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.

The invention relates to a non-circulation and magnetic integration dual buck half bridge inverter and a control method thereof,the windings of two filter inductance are coupled with the same magnetic core to reduce the volume and loss of a magnetic piece effectively. Each switch pipe is serially connected with a diode to prevent false connection of the switch pipe diode when the inductive current is zero, and then the non-circulation working mode is realized. The non-circulation and magnetic integration dual buck half bridge inverter and the control method thereof improve and innovate the traditional dual buck half bridge inverter. When keeping the advantages of traditional dual buck half bridge inverter, the volume and weight of the output filter inductance are reduced, and then the volume and weight of the whole inverter are reduced. The non-circulation working mode is realized to ensure the system reliability.