12 results about "Internal inductance" patented technology

This invention proposes a capacitive wireless charging portable gas detector, comprising a charging base that matches the portable gas detector. The charging base contains a power supply circuit, a control circuit, and a first coupling electrode plate. Both the power supply circuit and the control circuit are connected to the first coupling electrode plate. The control circuit generates a high-frequency PWM signal as a drive signal for the first coupling electrode plate. The portable gas detector contains a second coupling electrode plate, a charging circuit, and a battery. The second coupling electrode plate matches the first coupling electrode plate, and the closer-proximity second coupling electrode plate forms a capacitor structure with the first coupling electrode plate. The second coupling electrode plate induces a charge and is connected to the battery through the charging circuit. This invention utilizes coupling electrode plates instead of inductors, eliminating the need for large internal inductance. The coupling electrode plates inside the portable gas detector are separate and cannot form a capacitor, reducing the difficulty of intrinsically safe explosion-proof design, improving device safety, and extending the service life of the portable instrument.

The invention relates to a clamp-type resistor detection device suitable for a dangerous explosion area, which comprises a response coil and an excitation coil which are used for being connected to a detected grounding loop, and a connection loop of the response coil is provided with a first intrinsic safety protection unit; a connecting loop of the exciting coil is provided with a second intrinsic safety protection unit; the first intrinsic safety protection unit comprises a first resistor and a second resistor which are connected in series into a response coil loop; the first diode and the second diode are connected across the two ends of the response coil and are reversely connected in parallel; the first fuse is connected in series into the response coil loop; the second intrinsic safety protection unit comprises a third resistor connected in series into the excitation coil loop; the third diode and the fourth diode are bridged at the two ends of the exciting coil and are reversely connected in parallel; and the second fuse is connected in series with the excitation coil loop. The safety problem that ignition energy is introduced into a dangerous area due to internal faults or external abnormal voltage and current invasion of an inductance element in the clamp type grounding resistance detector is solved.

A method including: charging a capacitor in parallel to the ESD; determining whether an energy storage device (ESD) is in use; monitoring temperature of the ESD, the ESD has a prescribed and operational temperature range; discharging the capacitor through an inductor by temporary actuation of a switch that couples the inductor in parallel to the capacitor, wherein oscillation of current and voltage is provided by a first circuit formed by the capacitor and the inductor, maintaining the ESD temperature within temperature range through oscillation of the ions due to high frequency oscillation of a second circuit formed by the capacitor and the internal inductance of the ESD, repeating the temporary reactuation of the switch while temperature is within the temperature range. Wherein the given temperature range is the prescribed temperature range when the ESD is not being used and is the operational temperature range when the ESD is being used.

The utility model discloses a prime-coat-free high-heat-dissipation portable potting inductor which comprises a shell, an inductor structure, a first heat dissipation layer, a second heat dissipation layer and a third heat dissipation layer. The shell is internally provided with a containing cavity, and the containing cavity is internally provided with the inductor structure; the self-adhesion encapsulation structure is arranged between the inductor structure and the shell; and the multiple heat dissipation plates are installed at the bottom of the shell at intervals, and an air channel is formed between every two adjacent heat dissipation plates. In the production process, the encapsulating material with viscosity is directly poured to form the self-adhesive encapsulating structure, the self-adhesive encapsulating structure has viscosity, and it is ensured that strong cohesive force exists between the self-adhesive encapsulating structure and the shell, so that the stability of the self-adhesive encapsulating structure is ensured, a primer does not need to be brushed, the production efficiency is high, and the production cost is low. The two adjacent heat dissipation plates and the bottom of the shell define the air channel, cold air rapidly takes away heat on the shell when passing through the air channel, stable work of the shell is maintained, and the situation that the temperature of an internal inductor structure area is too high due to insufficient heat dissipation capacity of the shell is avoided.

The circuit board with a built-in inductor includes: a base material; a first wiring layer disposed on the first surface of the base material via a first insulating portion; a second wiring layer disposed on a second surface of the base material via a second insulating portion; and an inductor located inside the base material, the inductor including: a first conductor, a second conductor, and a third conductor extending in the thickness direction; a first magnetic body surrounding the peripheral surface of the first conductor; a second magnetic body surrounding the peripheral surface of the second conductor; and a third magnetic body surrounding the peripheral surface of the third conductor, the first end of each of the first conductor and the second conductor on the first surface side being electrically connected to a first connection electrode in the first wiring layer via a via conductor disposed in the first insulating part. Second end portions on the second surface side of each of the second conductor and the third conductor are electrically connected to a second connection electrode in the second wiring layer via a via conductor disposed in the second insulating portion.

The utility model belongs to the field of steady pressure valve especially electromagnetic valve anti -interference steady pressure valve, including steady pressure valve body, the steady pressure valve body is installed with mounting seat, and the top of mounting seat is equipped with the anti -interference component for steady pressure valve body anti -interference, the anti -interference component includes shielding cylinder, shield, recess one, degaussing coil one, recess two and degaussing coil two, shielding cylinder installs on mounting seat, and the outside of shielding cylinder is slidably equipped with shield, and the inner wall of shielding cylinder is equipped with recess one, and degaussing coil one is installed in recess one, and the inner wall of shield is equipped with recess two. The utility model discloses reasonable in design, through adjustable height's anti -interference component, convenient dismounting mechanism and the cooperation of degaussing coil and shielding structure, realized anti -interference component height adjustable, convenient installation and removal, effectively isolated internal inductance interference and shielded external electromagnetic interference, significantly promoted electromagnetic valve's stability and reliability under the work of complex electromagnetic environment.

The present invention discloses a direct-drive outer rotor hub motor that facilitates debugging of an inductive encoder. The motor comprises a hub housing, a movement in an outer rotor and stator configuration, and an inductive encoder. The rotor is directly fixed or integrally mounted on the hub housing, and the stator is fixed to the motor shaft via a stator bracket. One end of the motor shaft serves as a movement lead terminal, and a movement lead lead exit hole is provided axially thereon. The inductive encoder comprises an inductive ring fixed or integrally mounted on the inner end wall of the hub housing, and an encoder PCB board fixed to the motor shaft or the stator bracket. The motor shaft is characterized in that the other end serves as an encoder debugging terminal, and an encoder debugging hole is provided axially thereon. The inductive encoder is mounted near the encoder debugging terminal, and the encoder PCB board is provided with a debugging connection portion that extends into the encoder debugging hole via a radial jack provided on the motor shaft, and a debugging connection terminal is provided on the encoder PCB board, which is opposite to the mouth of the encoder debugging hole. The present invention enables more convenient and efficient debugging of an internal inductive encoder.

The application discloses a ring inductor using a novel material, comprising: a winding coil, which is wound on the outside of a ring magnetic core, and adopts a copper-clad aluminum wire; a winding positioning belt, which is provided as a hollow tubular structure, is located on the outside of the winding coil, and is provided with air holes on the side facing the winding coil, and the two ends of the winding positioning belt extend to the inside of an inductor bottom plate; and the inductor bottom plate, which is provided with an extension pipe sleeve in the inside, and the two ends of the winding positioning belt extend to the inside of the extension pipe sleeve; wherein the winding positioning belt is connected with the inductor bottom plate through a fastening mechanism; the two ends of the winding positioning belt are fixed downward through the fastening mechanism, the winding positioning belt tightly clamps the winding coil, and the winding coil is not easy to be loosened, so that the winding coil is conveniently fixed.

The application discloses a virtual reactance inverter grid-connected method based on droop control, which is based on the reference voltage generated by single-loop droop control and the dq-axis current, and adds virtual impedance control to generate virtual voltage to correct the reference voltage. The implementation effect of the method is equivalent to the increase of the internal inductance of the power grid, and the effect of weakening the strong grid inertia connected is achieved, so that the stability of the single-loop droop control inverter connected with the strong power grid is strengthened. The application is applied to the grid-structured single-loop droop control inverter, can realize the function of stable interconnection of the single-loop droop control inverter and the strong power grid, and has the characteristics of simple control method, less input devices and the like.

In this power semiconductor module, a first lead frame and a second lead frame through which currents flow in opposite directions are arranged so as to overlap each other, whereby the internal inductance can be reduced. In a direction perpendicular to one main surface of a first metal wiring layer, each of the first lead frame and the second lead frame is provided so as not to overlap parts of end surfaces of the first metal wiring layer and a second metal wiring layer. Thus, in a manufacturing process for the power semiconductor module before sealing with sealing resin, it is possible to easily perform positioning between the lead frames and between the metal wiring layer and the lead frame, using the end surfaces, whereby the manufacturing process can be simplified.

The invention discloses a radio frequency ion source for controllable source logging and a working method, and the method comprises the steps: one end of a high-voltage feed needle is disposed in a tube shell, and an inductance coil is wound on the tube shell; the permanent magnet rings are positioned on two sides of the inductance coil; the extraction electrode is positioned at the other end of the tube shell; the high-voltage feed needle is externally connected with a high-voltage power supply, and the high-voltage power supply feeds high voltage into the plasma through the high-voltage feed needle; the inductance coil is externally connected with a radio frequency power source and an impedance matching circuit; the radio frequency power source is connected with the inductance coil through the impedance matching circuit to form an induction electromagnetic field, so that the working gas in the tube shell is ionized, and then plasma is formed. According to the invention, energy is fed in through transmission coupling of the high-voltage feed needle and a radio frequency signal, so that the discharge chamber can obtain stable high-component monatomic deuterium ion plasma under high vacuum; according to the invention, the monatomic ion component of the ion source is greatly improved, and the working stability and the working life of the logging neutron tube using the radio frequency ion source are further improved.

Techniques are described for monitoring and controlling fall protection equipment. For example, the techniques of this disclosure may be used to monitor the connection status of fall protection equipment, e.g., whether or not the fall protection equipment is connected to a support structure. The techniques described in the disclosure may determine whether the fall protection equipment is connected to a support structure based on changes in a resonant frequency of an electronic circuit of an inductive sensor within the fall protection equipment. The inductive sensor may be formed from sets of one or more coils, where a first set of one or more coils and a second set of one or more coils are wound in opposite directions.