10results about How to "Reduce electromagnetic leakage" patented technology

The invention relates to the technical field of stator core production, in particular to a brushless motor stator core full-automatic production line which comprises a first punching mechanism, a second punching mechanism, a first feeding mechanism, a second feeding mechanism, a lamination conveying mechanism, an assembling jig, a welding mechanism and a discharging mechanism. The first punching mechanism is used for punching a first stator iron sheet, the second punching mechanism is used for punching a second stator iron sheet, the first feeding mechanism is used for grabbing a first stator iron sheet punched by the first punching mechanism and placing the first stator iron sheet on the assembling jig to be assembled into a first stator iron ring, and the second feeding mechanism is used for grabbing the second stator iron sheet punched by the second punching mechanism and placing the second stator iron sheet on the assembling jig to be assembled into a second stator iron ring. And stacking the first stator iron rings placed on the assembling jig to form a second stator iron ring. Through the design of high automation and integration, the production efficiency is remarkably improved, and the product quality is stable and reliable.

The invention relates to the technical field of stator core production, in particular to a motor stator core automatic processing and forming method, which comprises a first punching mechanism, a second punching mechanism, a first feeding mechanism, a second feeding mechanism, a lamination conveying mechanism, an assembling jig, a welding mechanism and a discharging mechanism, the first punching mechanism is used for punching a first stator iron sheet, the second punching mechanism is used for punching a second stator iron sheet, the first feeding mechanism is used for grabbing a first stator iron sheet punched by the first punching mechanism and placing the first stator iron sheet on the assembling jig to be assembled into a first stator iron ring, and the second feeding mechanism is used for grabbing the second stator iron sheet punched by the second punching mechanism and placing the second stator iron sheet on the assembling jig to be assembled into a second stator iron ring. And stacking the first stator iron rings placed on the assembling jig to form a second stator iron ring. By means of a series of automatic and precise processing steps, efficient, precise and stable production of the stator iron core is achieved. According to the method, the production efficiency is improved, the production cost is reduced, and the quality and reliability of products are remarkably improved.

The present application provides a method for determining a calibration network in a multi-channel SAR without delay. Calibration is performed through a calibration network in a multi-channel SAR without delay. The transmitting branch is connected to the power amplifiers of multiple driver amplifiers, and the limiter of a driver amplifier is connected to one end of a single-pole double-throw switch of a receiving branch. The circulator of each driver amplifier is connected to the first feeding network through a transceiver channel. The coupler of the transmitting branch is connected to the third single-pole double-throw switch of the calibration module. The phased array antenna module is connected to the first single-pole double-throw switch of the calibration module through a combiner. The calibration module is connected to the power divider through a single-pole single-throw switch. The power divider is connected to the other end of the single-pole double-throw switch in each receiving branch. The receiving branch is connected to the integrated digital unit. The integrated digital unit is connected to the transmitting branch. The calibration network and method provided in the present application can improve the gain stability when performing non-delay calibration.

An optical port assembly (1) and an optical module, relating to the field of optical communications. The optical port assembly (1) comprises a connector (100), an adaptor (200), and a shield (300). The connector (100) is connected with an optical fiber (110). The adaptor (200) has an accommodation cavity (210). The connector (100) extends into the accommodation cavity (210) to be fixed. The shield (300) has a hollow matching cavity (310), and the adaptor (200) extends into the matching cavity (310) to fixedly connect with the adaptor (200) and the shield (300). The shield (300) is wrapped on the adaptor (200) to define the relative position between the shield (300) and the adaptor (200), thereby defining the relative position between the shield (300) and the optical fiber (110), and then defining the position of an opening (330) on the shield (300) for allowing the optical fiber (110) to pass through. The relative position between the opening (330) and the optical fiber (110) is fixed, whereby the size of the opening (330) may be set to be approximately the same as the size of the cross-section of the optical fiber (110), so as to minimize of the opening (330) and reduce the electromagnetic leakage at the opening (330).

The waveguide microstrip conversion device comprises a waveguide, one end of a cavity of the waveguide is connected with a microstrip structure in an inserted mode, the microstrip structure comprises a dielectric substrate, a microstrip line and a microstrip circuit board, the microstrip line is arranged on the dielectric substrate, the dielectric substrate is connected with the microstrip circuit board, the dielectric substrate is connected in the waveguide in an inserted mode, and the microstrip circuit board is connected with the waveguide. A shielding plate is further arranged on one side of the waveguide, the microstrip structure penetrates through the shielding plate, an outer circuit board is further arranged on one side of the shielding plate, the outer circuit board is connected with a microstrip circuit board, and a radio frequency connector is connected to the microstrip circuit board. The waveguide and the micro-strip are ingeniously integrated, and the connecting contacts are arranged on the side surface of the micro-strip circuit board and are electrically connected with the external circuit board, so that the occupied space of the circuit board is greatly reduced, and the overall size is reduced; by arranging the shielding plate at one end of the waveguide where the microstrip structure is located, electromagnetic leakage caused by installation of the microstrip is greatly reduced, and the shielding effect of the end is ensured; and the choking coil is arranged to suppress the influence of surface waves and improve the gain.

The invention provides a method for determining a calibration network in a multi-channel SAR (Synthetic Aperture Radar) non-delay, calibration is performed through the calibration network in the multi-channel SAR non-delay, a transmitting branch is connected with power amplifiers of a plurality of driving amplifiers, and an amplitude limiter of one driving amplifier is connected with one end of a single-pole double-throw switch of one receiving branch. The circulator of each driving amplifier is connected with the first feed network through a transmit-receive channel. And the coupler of the transmitting branch is connected with the third single-pole double-throw switch of the calibration module. The phased-array antenna module is connected with the first single-pole double-throw switch of the calibration module through the combiner. The calibration module is connected with the power divider through the single-pole single-throw switch. And the power divider is connected with the other end of the single-pole double-throw switch in each receiving branch. And the receiving branch is connected with the comprehensive digital unit. And the integrated digital unit is connected with the transmitting branch. According to the calibration network and method provided by the invention, the gain stability during non-delay calibration can be improved.

The utility model discloses a device for high -voltage electrical equipment insulation detection test relates to insulation detection device technical field, including the protection box, the cavity of protection box fixedly connected with U type support board between two ends, the top one end of U type support board is fixedly connected with signal receiver, the top other end of U type support board is fixedly connected with pulse generator, the cavity bottom one end of protection box is fixedly connected with power module. The protection box provided by the utility model is convenient for the detection operation of the detected device quickly on the basis of realizing shielding electromagnetic and preventing interference influence detection accuracy, thereby solve the problem that the detection accuracy of the existing high -voltage electrical equipment insulation detection test device is interfered because of lacking electromagnetic shielding protection structure, and because of the detection process is complicated, it is difficult to realize quick detection, influence power system operation efficiency.

The invention discloses a feed structure, a millimeter wave radar antenna and an automobile, and relates to the field of antennae, the feed structure comprises a connection section, a conversion section and a grounding copper column row, the connection section and the conversion section are connected along the length direction and each comprise a first metal layer, a substrate and a second metal layer which are arranged along the height direction, the first metal layer comprises a first connecting part, a microstrip line and a second connecting part which are sequentially arranged at intervals in the width direction; the grounding copper column bar comprises a first copper column bar and a second copper column bar which are arranged on two sides of the microstrip line, two ends of the first copper column bar are connected with the first connecting part and the second metal layer, and two ends of the second copper column bar are connected with the second connecting part and the second metal layer; the connecting section comprises a first end far away from the conversion section and a second end connected with the conversion section, the first end is used for feed connection, the distance between the first end and the grounding copper column rows is smaller than that in the second end, the width of the microstrip line and the distance between the grounding copper column rows change correspondingly, and the width of the microstrip line of the conversion section is gradually increased in the direction far away from the connecting section.

The utility model discloses a broadband miniaturized double-T-section microstrip circulator, which comprises a wrapping base (2), a ferrite substrate (1), a double-T-section microstrip circuit (3), a ceramic gasket (4) and a permanent magnet (5) which are sequentially connected from bottom to top, the wrapping base (2) is connected with a shielding cover (7) in a buckling manner, and the shielding cover (7) is provided with a window (7a); the double-T-section micro-strip circuit (3) comprises two single-T-section micro-strip circuits (31), the ceramic gaskets (4) are arranged on central junctions (31a) of the single-T-section micro-strip circuits (31), the two single-T-section micro-strip circuits (31) are connected with each other through ports on respective branches to form an integral circuit, and the load port (3b) is connected with the side metallization load (6). The utility model has the advantages of simple structure, ultra-small size, good consistency, convenience in mass production, integration of a circulator and an isolator, convenience in use, suitability for surface mounting and microcircuit integration, and high safety.

The present invention relates to a heating device and a refrigerator. The heating device comprises: a cylinder, which defines a heating chamber for placing a to-be-processed object and has a take-and-drop opening located at the front side thereof; a door, which is used to open and close the take-and-drop opening of the cylinder; an electromagnetic heating device, which is used to generate electromagnetic waves into the heating chamber to heat the to-be-processed object; and a magnetic member, which is arranged on the door or the cylinder and is used to cause the door and the cylinder to attract each other, so that when the door is in a closed state of closing the take-and-drop opening, the door and the cylinder are in close electrical contact, thereby forming a continuous conductive shielding body. The arrangement of the magnetic member reduces the size of the gap between the door and the cylinder, reduces the amount of electromagnetic leakage, and on the other hand, helps the door and the cylinder to form a continuous conductive shielding body, preventing electromagnetic waves from being emitted through the gap that may exist between the door and the cylinder, effectively shielding electromagnetic radiation and eliminating the harm of electromagnetic radiation to the human body.