176results about How to "Shield electromagnetic interference" patented technology

The invention discloses an electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform comprises a neutral grounding module, a 10 kV bus, a 10 kV pi-type equivalent model electric transmission line module and a single-phase ground fault module. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can dynamically simulate a single-phase ground fault of an overhead line of different lengths and a cable line of a distribution network in a 1:1 voltage class. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can simulate different neutral grounding modes, such as neutral ungrounding, neutral low-resistance grounding and neutral grounding through an arc suppression coil; transmission lines of different lengths and different types can be simulated, such as the overhead line or the cable line; single-phase ground faults of various types can be simulated, such as metallic grounding, arc light grounding, high resistance grounding and the like; meanwhile, the electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform is provided with a distribution network fault indicator, a line selection and fault positioning device and ports of a DTU / FTU and other distribution network automation terminals, and the requirements for scientific researches, product development, product testing and related personnel operating training in directions of the distribution network single-phase ground fault line selection, traveling wave distance measurement accurate positioning and the like are met.

The invention relates to a retaining structure for retaining a sample detection porous plate. The porous plate is provided with an electrode and accommodates a sample. The retaining structure comprises a retainer and a pressure conversion plate. The retainer comprises a retainer main body and at least one probe module, wherein the retainer main body has an accommodating part for receiving the porous plate, and the probe module is arranged at the bottom of the accommodating part. The probe module comprises a plurality of contact probes, at least one switch probe and an electric insulating plate, wherein one end of each contact probe comprises an elastic contact terminal translating in a direction perpendicular to the bottom of the accommodating part, and the other end of each contact probe is electrically connected with a retainer control circuit; one end of each switch probe comprises an elastic pressing part translating in a direction perpendicular to the bottom of the accommodating part, and the other end of each switch probe is electrically connected with the retainer control circuit; and the contact probe and the switch probe are arranged on the electric insulating plate in a penetrating manner. When the porous plate is received in the accommodating part, the bottom of the porous plate presses against the elastic contact terminal of the contact probe and the elastic pressing part of the switch probe, the elastic contact terminal is electrically connected with the electrode arranged on the bottom of the porous plate, and the porous plate is disposed between the pressure conversion plate and the bottom of the accommodating part.

The invention belongs to the field of online monitoring of transformers, and particularly relates to a device and a method for monitoring the grounding current of a transformer core / clamp based on wireless communication. A straight-through current transformer and a device working circuit board are arranged in a shell. The upper part of the shell is connected with a housing top cover. A display screen is arranged on the housing top cover, and is connected to a controller. An external wireless communication module antenna is led from the shell. The device and the method can be used for monitoring data in real time, have functions of current ultralimit alarming, data information storage, system clock synchronization, parameter configuration and the like, and can be widely applied to the online monitoring of the grounding current of a core / clamp of electric equipment such as a transformer and a reactor, possible failures can be timely discovered, and the routing inspection work of an operator can be reduced or replaced.

The invention discloses a test method for current noise of a high-resistance device and a medium material, comprising the following test steps: firstly, arousing the low-frequency current noise of a high-resistance sample by utilizing a sample adapter; then amplifying the sample low-frequency noise by utilizing a low-noise current amplifier; collecting amplified noise signals by utilizing a data acquisition card; calculating the power spectrum density S0(f) of the collected current noise signals of which the high-frequency parts are attenuated by the amplifier; obtaining the amplitude-frequency characteristic curve of the current amplifier by utilizing a locking amplifier, and calculating a normalized curve Q(f) according to the amplitude-frequency characteristic curve; reducing the attenuated power spectrum density S0(f) by utilizing the Q(f), thus obtaining a power spectrum density curve S(f) of a reduced band spread; and finally, carrying out data analysis on the S(f) to screen devices or research sample reliability. By utilizing the test method, the problems of narrow times-number transmission band and insufficient test data in the existing test method for high-resistance sample noise are solved; and the test method provided by the invention has the advantages of high efficiency, automated operation and high precision of reduced data.

The invention discloses a socket connector, a plug connector and a combination structure thereof. The socket connector includes a first insulating body, a first shielding sheet, two rows of first contact terminals and a first shielding casing. The plug connector includes a second insulating body, a second shielding sheet, two rows of second contact terminals, at least one contact spring sheet and a second shielding casing. Through arrangement of the contact spring sheets in the plug connector, contact faces of the first shielding sheet are cooperated to expose side faces of a first clapper and during mutual-insert combination, the front ends of the contact spring sheets elastically abut against the contact faces so that a grounding circuit is formed through the contact connection and thus electromagnetic interferences, between the upper and lower rows of the contact terminals, caused when high-frequency signals are transmitted can be well shielded and the stability of transmission of the high-frequency signals is ensured better; and at the same time, the plug-in and plug-out forces of the connectors can be strengthened effectively and because the contact spring sheets and the contact faces are all made of metal materials, a demand of long plug-in and plug-out service lives of the connectors is met and the service life of the product is longer. The socket connector, the plug connector and the combination structure thereof are also capable of satisfying positive and reverse plug-in and plug-out.

The invention discloses a method for testing low-frequency noise of an amorphous silicon membrane, and specifically relates to a testing technology of low-frequency current noise of the amorphous silicon membrane. A testing system adopted by the testing technology comprises a biasing circuit, an electromagnetic shielding device, a noise amplifying system and a data acquisition and processing system. Firstly, the low-frequency current noise of the amorphous silicon membrane is motivated through the biasing circuit, sample low-frequency noise is amplified through a low-frequency noise current amplifier, amplified noise signals are acquired through a data acquisition card, corresponding current noise signal power spectral density is calculated, finally data are analyzed and processed through a computer, and a power spectral density curve of the low-frequency noise of the amorphous silicon membrane is obtained. The method for testing the low-frequency noise of the amorphous silicon membrane can be used for testing the low-frequency noise of the amorphous silicon membrane repeatedly and accurately, and is fast and convenient.

The invention discloses a position turning table applicable to a vehicle-mounted reconnaissance system and a mounting method of the position turning table. A static shaft and a moving shaft of the position turning table are connected through single direction thrust ball bearings, back-to-back angle contact ball bearings and angle contact ball bearings; hollow shafts and connecting plates are supported by the single direction thrust ball bearings, the back-to-back angle contact ball bearings and the angle contact ball bearings to form a position support platform. The position turning table is capable of achieving dynamic sealing through a magnetic fluid sealing ring, is good in sealing property and good in bearing capability, and the moment is also smaller than that of a conventional labyrinth seal mode; a photoelectric collector ring is adopted for signal conversion; large-diameter thrust bearings are adopted to bear a large load; an optical fiber sliding ring is adopted for optical fiber transmission, and a function can be achieved; due to addition of the filter in the position turning table, electromagnetic interference can be shielded.

The invention belongs to the field of mobile communication, and relates to a wireless communication module, in particular to a high-performance small-sized module of a code division multiple access (CDMA) evolution-data optimized (EV-DO) mobile terminal. The small-sized module is applicable to a third generation (3G) user terminal. The wireless communication module is characterized in that: board-level connection is carried out by ball grid array (BGA) package; the level of integration is high; the size is small; good electrical performance and an external interface function are realized; and requirements of a customer can be well met. The wireless communication module comprises a radio frequency front end, a transmitting and receiving channel, a base band processing part, a memory and a power manager, wherein the base band processing part and the radio frequency front end are placed on a top layer of a circuit board; a shielding cover is arranged on the top layer to guarantee an excellent electromagnetic compatibility function of the module; the memory is placed on a bottom layer of the circuit board; and the bottom layer adopts an advanced BGA technology to guarantee reliable connection during the application of the module.

The invention relates to a modular solid phase temperature-variable electrochemical nuclear magnetic resonance combined probe rod, which is equipped with a shielding shell, a radio frequency interface, an electrode interface, a seal disc, heat insulation locating sheets, heat insulation sheets, support rods, heat spacers, a circuit support rod, a probe circuit board, a temperature control sensor bracket, a sample holder, tuning rods, a coaxial line, and an electrode wire. The shielding shell is provided with four side plates and a top cover; the seal disc is a three-layer structure member, an upper heat insulation locating sheet and a lower heat insulation locating sheet are fixed on the upper surface and lower surface of the seal disc, the support rods and the heat spacers all have a modular structure, the lower end of the circuit support rod is connected to the upper end of the temperature control sensor bracket, the probe circuit board is mounted between the circuit support rod and the temperature control sensor bracket, the circuit board is equipped with a radio frequency connection interface, the temperature control sensor bracket bottom end is equipped with an inverted T-shaped platform, the sample holder is connected to the T-shaped platform, the coaxial line and the electrode wire are respectively connected to the radio frequency interface and electrode interface of the shielding shell, and pass through the seal disc to reach the probe circuit board and the sample holder.

The invention discloses an electrocardiogram cable and a manufacturing method thereof. The electrocardiogram cable comprises a strengthening wire on which a plurality of side-by-side copper wires are spirally wound, wherein an acrylic insulating resin is covered on the outer surface of the strengthening wire to form an electrocardiogram inductor. An ethylene carbon resin layer and an insulated vinyl resin layer can be coated on the outer surface of the electrocardiogram conductor in turn, and the side-by-side copper wires are spirally wound on the outer surface of the electrocardiogram conductor; a human body connection terminal can be connected to one end of the electrocardiogram conductor in a pressing mode, the other end of the electrocardiogram conductor is connected with an electric wire tail end of a multi-core electromagnetic shielding wire through a resistor, and the resistor is subjected to shielding treatment; and a plug and an annular magnetic ring for an electrocardiogram machine are connected to the other end of the multi-core electromagnetic shielding wire. A signal amplifier and an analog / digital (A / D) converter are arranged between the electrocardiogram conductor and the multi-core electromagnetic shielding wire in turn. By the electrocardiogram cable, the bending resistance and the tensile strength of the cable are enhanced, and the using cost is reduced; electromagnetic interferences can be well shielded, and the signal stability and the accuracy are improved; lead pollution is avoided, so that the electrocardiogram cable is relatively environment-friendly; and the electrocardiogram cable can be connected with a personal computer (PC) to manufacture electrocardiograms.

The invention belongs to the technical field of atomic clocks and frequency standards and particularly relates to a single electron atom light clock and a preparation method thereof. In the technical scheme adopted by the invention, transition of a laser frequency band between a ground state and a second excited state of a single electron atom is used as a quantum frequency standard of an optical frequency band and an optical comb is combined to obtain the light clock implemented after the frequency is transferred. In the scheme, a cesium atom is used as an example, the narrow spectrum line width characteristic of the second excited state of the cesium atom can be utilized, and a magnetic sub energy level in an outer magnetic field generated by a coil can be decomposed out for laser frequency stabilization. Temperatures of the magnetic field and an atomic furnace can be controlled to optimize a system to enable the system to be in a good working state. Additionally, due to the housing design of the system, electromagnetic interference of the outside can be shielded. By regulating the current and the temperature of a semiconductor laser and controlling the voltage of a piezoelectric ceramic with a cavity length, the final output frequency of laser is stabilized on a transition spectral line of the cesium atom, which has a wavelength of 459nm from 6S to 7P1 / 2 or 455nm from 6S to 7P3 / 2.

The invention relates to a power joint device. The device comprises a joint body, a power device and a measuring device; the measuring device comprises a first angular measuring device, the first angular measuring device comprises a first magnet and a first magnetic field induction circuit, the first magnet is connected with one end of a motor output shaft, and is close to a first motor cover plate, the first magnetic field induction circuit is arranged on the inner side of the first motor cover plate and is close to the first magnet, a motor rotates to drive the motor output shaft to rotate,and further drive the first magnet to rotate, and the first magnetic field induction circuit induces the rotating angle of the first magnet so as to measure the rotating angle of the motor. Through the first magnet and the first magnetic field induction circuit which are in the non-contact coupling manner, measuring of the motor rotating angle is achieved, mechanical friction losses are avoided, simpleness, lightness, thinness and low cost are achieved, compared with an existing integrated type encoder scheme, mechanical structural design complexity is greatly simplified, a magnetic field generated by the magnet is a static magnetic field, the environment interference influence is avoided, and reliability is high.

The invention features the following: using metallic filament ball to fill the gap between cables or between cable and bulkhead, and filling the conducting daub and sealant at both side of the metallic filament ball; and further, the cable, conducting daub, sealant and metallic filament are loaded together into a cable pipe, and the cable pipe passes through the bulkhead and makes a sealed connection with the bulkhead.

The invention provides an on screen display data electromagnetic compatible test system and method. The system comprises a test unit, a data acquisition unit, a shooting monitoring unit, and an on screen control unit, wherein the data acquisition unit is used for obtaining first test data generated by the test unit, extracting the target data in the first test data to generate second test data, and sending the second test data to the on screen control unit; the shooting monitoring unit is used for performing video monitoring on the area to be tested, and sending obtained video data to the on screen control unit; the on screen control unit is used for displaying received second test data and video data on a same screen. The on screen display data electromagnetic compatible test system can realize simultaneous display of test data and monitoring videos, and provide great convenience for test personnel.

The invention discloses a wireless charging device which comprises a first resonance coil, a second resonance coil, a first electromagnetic shielding cover, a second electromagnetic shielding cover and a load coil. The first resonance coil has first characteristic index and is located at the transmitting end. The second resonance coil has first characteristic index and located at the receiving end, and a preset distance is arranged between the first resonance coil and the second resonance coil. The first electromagnetic shielding cover covers the periphery of the first resonance coil and has first specific inherent attribute. The second electromagnetic shielding cover covers the periphery of the second resonance coil and the load coil and has first specific inherent attribute. The load coil is located on the same plane with the second resonance coil and on the periphery of the second resonance coil. The load coil is connected with an external device to couple electric energy carried by the second resonance coil. The first characterized index and the first specific inherent attribute are calculated according to preset distance and preset frequency. The preset frequency is resonance frequency of the first resonance coil and the second resonance coil. The wireless charging device can achieve high-efficiency low-radiation low-section wireless charging of automobiles in a certain distance range.

The present invention provides a photoelectric sensor package and a package method thereof, and relates to the field of sensors. The photoelectric sensor package comprises an upper housing with a light transmitting window and a lower housing being in seal connection with the upper housing; the light transmitting window is provided with a light transmitting quartz glass sheet; a location thermal insulation seal cover is arranged between the quartz glass sheet and a photoelectric sensor and is configured to fix the photoelectric sensor and the light transmitting quartz glass sheet, and the location thermal insulation seal cover is internally provided with a cavity configured to hold anhydrous nitrogen and oxygen mixed protection gas; the photoelectric sensor package further comprises a semiconductor refrigeration sheet, a cold end plane of the semiconductor refrigeration sheet is provided with an electromagnetic shielding temperature guidance plate made of metal materials with a good temperature guidance effect, and one side of the electromagnetic shielding temperature guidance plate is butted against the photoelectric sensor to transmit a low temperature at the cold end of the semiconductor refrigeration sheet to the photoelectric sensor.

The present invention provides a plastic laser front case penetrating welding vehicle-mounted camera, the front case and a rear case are welded together, and no additional waterproof components are needed, and external moisture is completely prevented from entering inside of a body, and overall heat dissipation performance is good, and external electromagnetic interference can be shielded. The vehicle-mounted camera includes the front case, the rear case, a first substrate, and a second substrate. The front case and the rear case are both made of plastic materials, a front end of the front case is fixedly arranged with a front convex lens, an inner groove is disposed on an outer circumference of a rear end surface of a front case side convex for positioning the rear case, and a front end surface of the side convex end corresponding to the inner groove is a plane, and a portion of the rear case facing the inner groove is a bulge for positioning, the first substrate is fixedly installedon a rear substrate mounting member of the front case, the second substrate is fixedly installed on a corresponding substrate mounting member of the rear case, and a first rear end connector of the first substrate is connected to a front end slot of the second substrate.

The invention discloses a capacitive sensing-based display screen gesture control circuit and method. The circuit comprises a display screen and sensors arranged around the display; the sensors are arranged in a strip shape; a shielding layer is arranged at the periphery of each sensor; multiple sensors output sensing signals to a detection circuit; the grounded end of the display screen is disconnected with the ground; and the grounded end of the display screen, the sensors and the shielding layers are all connected to a shock signal source. The method comprises the steps of detecting the signals output by the sensors through the detection circuit, and determining the sensors which work currently; loading voltage signals of shock to the sensors which do not work, thereby enabling the voltage signals loaded to the sensors which do not work and the sensors which work to keep synchronous shock; and detecting the signals output by the sensors which work currently through the detection circuit, and according to the changes of the signals output by the sensors which work currently, determining gestures. The changes of the user gestures can be accurately detected; and the production costis relatively low.

The invention aims at providing an air conditioner for an electric coach with improvement of reliability of an electric appliance component; a compressor, a power transforming device and an electric appliance control part are provided with a closed metal shell for an electric cabinet with shielding function; a core body of an evaporator and an evaporating blower are provided with a shell of the evaporator outside; a cooling metal pipeline is arranged between the metal shell of the electric cabinet; one interface of the cooling metal pipeline is arranged on the shell of the core body of the evaporator and the other interface is arranged on the metal shell of the electric cabinet; the other end of the metal shell of the electric cabinet is provided with an air outlet with an downward opening.

The invention discloses a low-smoke halogen-free polyolefin insulated and shielded cable, which comprises a conductive core, an isolating guide layer, an insulating sheath layer, a shielding sheath layer and an outer protecting sleeve layer. A preparation method of the low-smoke halogen-free polyolefin insulated and shielded cable comprises a wire drawing procedure, a wire bundling procedure, a compound stranding procedure, an isolating guide layer process, an insulating sheath layer process, a shielding sheath layer process and an outer protecting sleeve layer process. By the low-smoke halogen-free polyolefin insulated and shielded cable and the preparation method thereof, the cable can have good anti-stretching and anti-bending properties, high temperature resistant and flame retardant properties and good insulating and shielding properties, can effectively shield the interference of external electromagnetism and the like, improves the transmission quality of the cable and is long in service lifetime and beneficial to popularization and application.

The invention discloses an electronic throttle valve body of a diesel engine. The electronic throttle valve body comprises a main body, a printed circuit board of a control circuit, a throttle valve sheet, a limiting block, a bearing, a throttle valve shaft assembly, a magnet assembly, a socket assembly, a resetting gear assembly, a direct-current motor, a resetting spring and a dustproof cover. The printed circuit board of the control circuit is welded on the socket assembly; a limiting board is formed on a throttle valve shaft through injection molding so as to form the throttle valve shaft assembly; a resetting gear is welded on the throttle valve shaft assembly; the throttle valve shaft assembly is assembled on the throttle valve body through the bearing; and the throttle valve sheet is inserted into the throttle valve shaft and is linked through a screw. The direct-current motor is mounted in the main body through the socket assembly in a pressing manner. The resetting spring is located below the resetting gear assembly. One stand bar of the resetting spring is hung on the main body, and the other stand bar is hung on the resetting gear assembly. The electronic throttle valve body disclosed by the invention is not influenced by a magnetic field. Furthermore, an entire control system is sealed in a cavity. Compared with the prior art, a protection cover is manufactured by a metal board with higher magnetic conductivity, so that the electronic throttle valve body can be used for shielding external electromagnetic interferences.

The invention is suitable for the technical field of public address systems, and provides a microphone, which comprises a power supply module, an audio signal amplification unit connected with the power supply module, an input module used for inputting reminding time information by a user, a microcontroller connected with the input module and used for monitoring the reminding time information input by the user and sending a reminding control signal when reaching the reminding time, and a reminding module connected with the microcontroller and used for controlling the work by the reminding control signal of the microcontroller, wherein the input module, the microcontroller and the reminding module are connected with the power supply module. The reminding module is arranged in the microphone, when the set reminding time reaches, the reminding module reminds the user, and therefore, the user can be well helped to control the time and the rhythm of a speech, and can be applied to a wired microphone and a radio microphone.

The invention discloses a large-capacity inverter module with high-current / high-voltage IGBTs directly connected in parallel. The large-capacity inverter module comprises a water-cooled plate, discrete IGBT devices, a laminated busbar, a first absorbing capacitor, a driving loop, an AC side convergence busbar, a current sensor, a DC side laminated busbar, a second absorbing capacitor, a DC side negative convergence busbar and a DC side positive convergence busbar, wherein the number of the discrete IGBT devices is six, and the six discrete IGBT devices are sequentially and evenly arranged on the water cooling plate from top to bottom. The large-capacity inverter module with the high-current / high-voltage IGBTs directly connected in parallel have the advantages that the calculation of current impedance of the branch circuits connected in parallel is precise, the consistency is guaranteed, a high current sharing coefficient is realized, the cable lengths of the devices of different phasesof the driving loop are identical, and the paths are separated and do not interfere with one another; and the large-capacity inverter module adopts a main loop layout design, makes full use of space,optimizes circuit paths, is high in power density, has small overall module size, is simple, is convenient to maintain and install, and has good electrical properties.

The invention discloses a novel corona discharge-based ion mobility spectrometry device, which comprises a corona discharge ion source, an ion migration unit and an electric signal processing unit, wherein the corona discharge ion source comprises a discharge metal wire, a grounding electrode, a shielding layer, a gas and sample injection inlet I, a gas outlet I and a metal wire bracket; the ion migration unit comprises an ion migration member, an ion gate, a pulsed power supply, an annular metal electrode, a fixed-value resistor, a DC power supply, a gas outlet II and a gas inlet II; the electric signal processing unit comprises a faraday plate and a shielding metal plate; the faraday plate is arranged at the internal tail end surface of the ion migration member; the diameter of the faraday plate is greater than the inner diameter of the ion migration member; the shielding metal plate is arranged on the external tail end surface of the ion migration member; a certain gap is formed between the faraday plate and the shielding metal plate; and the diameter of the shielding metal plate is greater than the outer diameter of the ion migration member. The sensitivity of an ion mobility spectrometer can be improved.

The invention relates to a ferrite magnetostrictive displacement sensor device comprising a sensor head, a measuring rod and a moving magnetic ring assembly. The sensor head is provided with a microprocessor, a circuit processing module and a coil. The microprocessor and the circuit processing module are mounted in a closed shielding box. The circuit processing module is used for generating an excitation pulse and conditioning an echo signal. The coil is placed at one end of a waveguide wire for receiving the echo signal. The other end of the waveguide wire is provided with a damper for absorbing a torsional wave. The measuring rod includes the waveguide wire, an aluminum sleeve and a casing. The aluminum sleeve tightly wraps the waveguide wire and is disposed inside the casing. The casingis sleeved with a magnetic ring movable left and right on the casing and used for interacting with the waveguide wire. The waveguide wire uses ferrite as a magnetostrictive material. The ferrite magnetostrictive displacement sensor is greatly improved in operation stability, reduced in external interference, improved in the measurement accuracy, and reduced in cost.

The invention relates to an orthogonal signal quadruplicated frequency counting method with a filter function, and relates to an orthogonal signal quadruplicated frequency counting method. The invention aims at solving the problem of the prior art that counting mistake is caused by interference of burrs which are easily introduced by shortage of a filter function. A counter, a signal shifting register A and a signal shifting register B are initialized, the signal shifting register A and the signal shifting register B are shifted for one bit at each clock edge, and values stored in the signal shifting register A and the signal shifting register B are used for analyzing whether the edge of a signal A or a signal B exists or not. If the edge of the signal A or the signal B exists, the level of another phase of signal is detected according to the edge of the current signal A or the signal B so as to judge the steering of a motor; when the motor rotates in reverse, the counter is minus one; and when the motor rotates normally, the counter is plus one and waits for a next clock. The method is used for counting the orthogonal signal quadruplicated frequency.

The invention discloses an anti-electromagnetic interference system for an electric car compressor. A filter is connected to a high-voltage power supply wire harness of the compressor in series; useless or even harmful frequency components in a signal are filtered out; the interference to the compressor in the electrifying process of a direct-current bus of the compressor is removed; and in addition, grounding treatment is carried out on a compressor housing, so that the effects on the electric compressor caused by electromagnetic interference which propagates through space are effectively inhibited.

The invention discloses a high-strength aviation impact-resistant anti-vibration shielding cabinet, and relates to the technical field of aviation shielding cabinet equipment. The cabinet comprises two parallel side plates (1) and a rectangular frame (2), and the rectangular frame (2) is installed between the two parallel side plates (1) in a parallel manner. The rectangular frame (2) comprises a sealing cross beam (3) and a reinforcing vertical beam (4), which are connected through a riveting block to form the rectangular frame (2). The sealing cross beam (3) comprises a cross beam main body (31), and the cross beam main body (31) is provided with a circular bottom hole (32) for installing a steel wire thread sleeve, a flat hole (33) for installing a riveting block (5), a irregularly-shaped hole (34) for installing a nut bar (6), wherein the irregularly-shaped hole (34) is located at an inner side of the cross beam main body (31). The cabinet is advantageous in that the cabinet guarantees the overall strength of the cross beam main body (3) and the reinforcing vertical beam, and improves the work stability.

The invention discloses a flame-proof type frequency conversion integrated permanent-magnet synchronous motor, which comprises a motor base and a frequency conversion control cabinet, wherein the frequency conversion control cabinet is welded on the motor base; and a frequency converter is mounted in the frequency conversion control cabinet. The inside of the frequency conversion control cabinet is divided into a first cavity, a second cavity and a third cavity through separation plates; the motor base comprises a cylinder and an end cap; the cylinder is formed by an inner cylinder and an outer cylinder which are sleeved together; the inner cylinder and the outer cylinder are integrally welded in an interference fit manner; a spiral groove is formed on the outer cylinder surface of the inner cylinder; the end cap comprises a first end cap and a second end cap which are respectively located at two ends of the cylinder and a third end cap located inside the cylinder; a rotor and a stator are arranged between the first end cap and the third end cap; and an input reactor and an output reactor are arranged between the third end cap and the second end cap. The permanent-magnet synchronous motor is novel in structure, is reasonable and compact, can effectively utilize the limited space, is compact in product structure, high in power factor, efficiency and power density, and can effectively reduce the motor volume and the energy consumption.