5results about How to "Reduce electromagnetic radiation" patented technology

The application discloses an environmental protection gas load switch and belongs to the electrical equipment field, which is used to solve the problem of how to inhibit or eliminate the arc generated when the static contact and the moving contact of the load switch are disconnected. The environmental protection gas load switch comprises a shell, a moving contact, an operating mechanism, a first static contact and an arc extinguishing device. The moving contact is rotatably arranged in the interior of the shell, the operating mechanism is used for controlling the rotation of the moving contact, and the first static contact is fixedly arranged in the interior of the shell. The arc extinguishing device comprises a shell body, a rotating arm, a vacuum bubble and a reset spring, the shell body is fixedly arranged on the shell, the rotating arm is rotatably arranged on the shell body and is provided with an electrically conductive part, the electrically conductive part is arranged on the rotating path of the moving contact, the vacuum bubble is arranged on the shell body, and the two ends of the vacuum bubble are electrically connected with the electrically conductive part and the first static contact respectively, and the reset spring is arranged between the rotating arm and the shell body. When the moving contact is disconnected with the first static contact, the moving contact is electrically connected with the electrically conductive part.

The application provides a harmonic suppression radio frequency power amplifier, wherein one end of an input matching circuit is connected with a radio frequency input end; the other end of the input matching circuit is connected with a base of a power amplifier tube; a collector of the power amplifier tube is connected with a power supply voltage through a first matching branch; an emitter of the power amplifier tube is connected with a first connecting point on a packaging substrate; the collector of the power amplifier tube is connected with a radio frequency output end through a second matching branch; the second matching branch is connected with the packaging substrate; a first end of a harmonic control circuit is connected with the collector of the power amplifier tube; a second end of the harmonic control circuit is connected with a second connecting point on the packaging substrate; a metal layer farthest from the power amplifier tube in a plurality of metal layers of the packaging substrate is a first metal layer; the first connecting point and the second connecting point are located on a second metal layer in the plurality of metal layers, and the first connecting point is connected with the second connecting point; and the second metal layer is a metal layer closest to the power amplifier tube in the plurality of metal layers.

The present application relates to a motor with high electromagnetic compatibility level, comprising a stator assembly, a rotor assembly and an end cover assembly, the stator assembly comprises a metal shell, the rotor assembly comprises a rotor core and a rotor shaft, the end cover assembly comprises an end cover, the shell comprises a first end provided with a bearing chamber and an open second end opposite to the first end, the motor is further provided with a metal cover, the cover is provided with a plurality of retaining tabs on its peripheral edge, the end cover is provided with a plurality of positioning protrusions on its peripheral outer surface, a positioning notch for cooperating with the positioning protrusions and a retaining notch for cooperating with the retaining tabs are arranged at the end edge of the second end of the shell, so that the rotor assembly and the end cover assembly are completely encapsulated in the shell by the cover, so that the motor as a whole is in a metal closed structure. The present application also relates to an automobile seat comprising the above motor. By using the motor according to the present application, electromagnetic radiation of the motor can be more effectively suppressed, and a very high EMC level can be obtained.

The utility model relates to the technical field of car light circuit, specifically disclose a miniaturized integrated car light BUCK circuit, including BUCK IC integrated chip, BUCK IC integrated chip includes VIN pin, EN pin, VOUT pin, FB pin, VCC pin and BST pin, has the first capacitor group and second capacitor group on VIN pin, the first resistance formation POWER IN is connected on EN pin, the voltage -division resistance for voltage division is provided with on FB pin, VOUT pin is connected with third capacitor group, the utility model discloses a purpose at to solve the traditional car light circuit reliability problem through car light BUCK circuit, help system improves stability.

This utility model belongs to the field of lighting technology and discloses a lighting fixture with electromagnetic radiation resistance, including: a light source board, a live wire terminal, a neutral wire terminal, a ground wire terminal, and a surge protection device; the light source board includes: a substrate, a rectifier and filter circuit, a driver circuit, and a string of LED beads; the rectifier and filter circuit, the driver circuit, and the string of LED beads are soldered onto the substrate; the surge protection device is equipped with a surge protection circuit; the live wire terminal, the neutral wire terminal, and the ground wire terminal are respectively connected to the surge protection circuit; the live wire terminal and the neutral wire terminal are used to receive AC power from the outside and transmit the AC power to the rectifier and filter circuit through the surge protection circuit; the rectifier and filter circuit is used to convert the AC power into DC power; the driver circuit is used to convert the DC power into a driving current for driving the string of LED beads. This utility model, by setting up a surge protection circuit and utilizing the circuit structure of the surge protection circuit, reduces the surge effect of the mains power and reduces the electromagnetic radiation caused by surge fluctuations. This improves the stability of the entire lighting fixture.