8 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 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 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.

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.