47results about How to "Improve the electromagnetic environment" patented technology

The invention discloses a series-connected bridge-type impedance network power converter. The series-connected bridge-type impedance network power converter is formed by connecting a first inductor (L1), a first capacitor (C1), a second inductor (L2) and a second capacitor (C2) in series from end to end in turn. A two-way switch (33) is diagonally connected to two connecting points (A and B) of a bridge-type impedance network (12); the input node (P1) of the bridge-type impedance network (12) is connected with the positive electrode of an input side power converter (11); the output node (P2) is connected with the positive electrode of an output side power converter (22); and the negative electrode of the input side power converter (11) is connected with the negative electrode of the output side power converter (22). A load (20) is connected with the middle point of a bridge arm of the output side power converter (22); and a power supply (10) is connected with the middle point of the bridge arm of the input side power converter (11). Different conversion aims can be realized by controlling the topology structure of a bridge through the two-way switch (33).

The invention relates to a design method for selecting an installation position of shared iron tower communication equipment. The method comprises the steps of: enabling computer equipment and programs to be used for operation, using an electromagnetic environment simulating model at least once to perform simulation calculation analysis of the preliminarily determined electromagnetic environmentdata of the communication equipment at the installation position of the shared iron tower to generate communication performance index data, and comparing the communication performance index data withthe communication equipment and a human body electromagnetic environment threshold to obtain an accurate and safe installation position of the communication equipment on the shared iron tower. The invention relates to an optimal design method for selecting the installation position of communication equipment of a shared iron tower, which has stronger systematicness and universality, can save design resources and time cost, can meet the performance requirements of the communication equipment and power equipment on the shared iron tower, and ensures that the working environment of the shared equipment meets the requirements of electromagnetic environment, electrical safety distance and the like.

The invention discloses a precision-location stepping motor for a micro-stepping instrument, which comprises a shell upper cover (1), a shell lower cover (2), a permanent magnet rotor (3), a primary transmission gear set driven wheel (5), a secondary transmission gear set driving wheel (6), a primary transmission gear set driven wheel rotary shaft (7), a secondary transmission gear set driven wheel (8), a three-level transmission gear set driving wheel (9), a three-level transmission gear set driven wheel (11), a pointer drive shaft (12), an excitation winding coil XA (13), an excitation winding coil XB (14), a coil pin A (15), a coil pin B (16), a coil pin C (17), coil pin D (18), a stator iron core body (19) and the like. The reduction ratio of a three-level reduction gear system is 720:1, and the minimum location resolution is 0.0833 degrees; and the invention realizes micro-stepping rotation on the aspect of structure, does not need an extra drive circuit when in use and is a stepping motor for the instrument ,which has precision location and can enable a point to smoothly move.

The invention relates to a magnetic isolation type multi-circuit synchronous trigger circuit with negative voltage bias. The multi-circuit synchronous trigger circuit comprises a primary side drivingcircuit used for generating positive and negative dual-polarity pulse signals, a magnetic isolation transformer, secondary side driving control modules and a plurality of controlled semiconductor switches; and the primary side coil of the magnetic isolation transformer is connected with the primary side driving circuit while the secondary side coil generates synchronous driving signals of different time sequences through the multiple secondary side driving control modules to drive the controlled semiconductor switches. Compared with the prior art, the multi-circuit synchronous trigger circuithas the advantages of improving of driving efficiency, lowering of complexity, providing of negative voltage bias and the like.

The invention relates to an electromagnetic charging magnetic rail of a mobile electromagnetic charging station. The electromagnetic charging magnetic rail comprises an electromagnetic charging winding, an electromagnetic charging magnetizer, presser feet, pressing plates, clamping and pressing bolts and magnetic rails and the like. The electromagnetic charging winding as a main component is similar to a primary winding of a transformer and is installed on the electromagnetic charging magnetizer that is connected with the magnetic rails. Because the magnetic rails, which are long, have electromagnetism by introduction and can carry out multiphase operation, a charging magnetizer can be operated for a long time. A charging coil generates secondary currents that are sent to a charging device, so that an electric vehicle that is charged by electromagnetic charging can be driven and charged simultaneously during the vehicle moving process. Therefore, problems that electric power storage and continuous moving capabilities of the present electric vehicle are poor can be solved, thereby ensuring reliable operation of the electric vehicle and improving the practicability and commercial value of the electric vehicle.

The invention discloses a ground train transient impulse interference field intensity analysis system. The system comprises an impulse interference capture module used for capturing impulse interference information of a steel rail on a railway or other interference transmission routes in real time, a frequency domain analysis module used for receiving the impulse interference information and analyzing the frequency domain of the impulse interference information, a time domain analysis module used for analyzing the time domain of a frequency domain analysis result, and a transient interference analysis module used for conducting transient interference analysis according to the frequency domain analysis result and a time domain analysis result. By the adoption of the system, a tester can completely master the characteristics of the time domain and the frequency domain of transient interference generated in the running process of a train, influences generated by the interference on related equipment of a railway signal system can be further analyzed, effective signal equipment anti-interference protective measures are provided, the electromagnetic environment of the signal system is improved, and it is guaranteed that the functions of the signal equipment are normal.

The invention relates to a filter of an impulse power output port of motor speed controllers. The filter comprises a passive filter circuit and whole shielding of the circuit, and the filter is characterized in that the passive filter circuit is an interference reflection circuit which is fixed in a shielding casing, and the interference reflection circuit is formed by a first common mode inductor and a second common mode inductor which are provided with same winding numbers and connected through a tandem connection line. The filter can be suitable to power output ends of the motor speed controllers in different types, protects winding insulation of a motor of servo systems in different types, simultaneously restrains conducted interference of a power output line of the motor speed controller, effectively reduces radiated interference of the servo system, and greatly improves an electromagnetic environment of site sensitive equipment.

The invention discloses a signal conditioning board with an electromagnetic shielding function, which comprises a circuit board which is designed by adopting the appearance of a PCI (peripheral component interconnect) board and a shielded enclosure, wherein the circuit board adopts an electromagnetic compatibility processing mode of a conventional circuit, and the shielded enclosure comprises a front cover plate, a rear cover plate and a baffle plate. According to the signal conditioning board, a signal conditioning circuit in a target simulator is designed into a circuit board with the appearance of the standard PCI board, the shielded enclosure is added on the whole circuit board, therefore, the electromagnetic environment of the signal conditioning board in an industrial personal computer is effectively improved, and the equipment failure caused by a weak signal interfered by other electrical signal in the industrial personal computer is avoided. The signal conditioning board is fixed in a PCI groove in the standard industrial personal computer by using the fixed mode of the PCI board, the power supply of the industrial personal computer is directly used to supply power for the signal conditioning board, the whole signal conditioning board meets the installation requirement of the standard industrial personal computer (40 cm * 30cm * 25cm), so that the portable and integrated design of the equipment is realized, and the signal conditioning board is compact in structure, small and light and convenient to carry and used in different places.

The invention aims at providing an ultra wideband antenna integrated with a stepped impedance tuning bar; the ultra wideband antenna comprises a medium base plate, a radiating element, a stepped impedance tuning bar, a coplanar waveguide feed signal strip line and a coplanar waveguide ground plane, wherein the radiating element, the stepped impedance tuning bar, the coplanar waveguide feed signal strip line and the coplanar waveguide ground plane are arranged on the medium base plate; the coplanar waveguide feed signal strip line and the coplanar waveguide ground plane form a coplanar waveguide feed structure; the radiating element is arranged in the coplanar waveguide ground plane; the radiating element and the coplanar waveguide ground plane form a wide groove structure; and the stepped impedance tuning bar comprises a first stepped impedance tuning bar and a second stepped impedance tuning bar, wherein the first stepped impedance tuning bar is integrated on the radiating element, and the stepped impedance tuning bar is integrated on the coplanar waveguide ground plane. According to the ultra wideband antenna, the mutual interference between an ultra wideband communication system and the traditional narrowband system can be reduced, and the cooperative communication between the two systems is realized.

The invention relates to a modular unit based on a modular multi-level voltage source converter, which is characterized by comprising two side supports (1), submodules (2), a transverse beam (3), a communication line (4), a cooling water pipeline (5) and a shielding cover (6); the two side supports (1) are positioned at two ends of the module unit; the transverse beam (3) is laid between the two side supports (1), and a plurality of independent submodules (2) are mounted on the transverse beam; the modular unit is easy to expand so as to obtain the converter with higher voltage and larger capacity; the modular unit is a basically independent module, and integrates the submodules, a cooling system, a communication system and a shielding system; and the modular unit is the basically independent module integrating the submodules, the cooling water pipeline, the communication line and the shielding cover, and is a complete expandable unit.

The invention relates to a conductor configuration method for a direct current power transmission circuit; electrode conductors of the direct current power transmission circuit are vertically configured by utilizing an F tower; and the conductor configuration method is characterized in that the configuration manner of the electrode conductors on the F tower is positive electrode at the upper part and negative electrode at the lower part. By the comparison of experimental data obtained from computation and experiments, the method is proven to have relatively high accuracy, be applicable to shrunk corridor for direct current power transmission in the future and improve the total electric field of the power transmission circuit.

The invention provides a power-frequency electric field optimization method for a series reactor region of a 500kV transformer substation, and the method comprises the steps: determining the related information of the series reactor region of the 500kV transformer substation, and constructing a calculation model according to the related information; employing a boundary element method to carry out the simulation solving of the calculation model for each phase sequence array in the range of a preset double-circuit bus phase sequence array, obtaining the power-frequency electric field intensities which are respectively corresponding to each phase sequence array, and screening out the power-frequency electric field intensities meeting a certain condition, and the corresponding phase sequence arrays; obtaining the current phase sequence array of a double-circuit bus of the series reactor region of the 500kV transformer substation, and modifying the current phase sequence array into the screened phase sequence array. According to the invention, the method analyzes and adjusts the phase sequence array of the double-circuit bus of the series reactor region, reduces the power-frequency electric field intensity of the series reactor region, and achieves a purpose of optimizing an electromagnetic environment.

The invention belongs to the technical field of microwave radio frequency and test measurement, and relates to a microwave darkroom with microwave absorbing ridges. With the direction facing a launching point as the reference, the ridges are laid on the ground, the top and/or the side wall of the microwave darkroom, and the laying position of the ridges is determined according to the following method, firstly, the position of a dead zone is determined, and a microwave absorbing ridge laying plane is used as a symmetry plane, a mirror point of the launching point is determined, the mirror pointof the launching point is connected with the two edges of the dead zone, the two connection lines form intersections with the microwave absorbing ridge laying plane, and a connection line of the twointersections is the microwave absorbing ridge laying plane. A new structural design which improves the electromagnetic environment of the microwave darkroom is provided.

The invention discloses a power conversion method and system for a multi-modular electric vehicle charging station. The method comprises the steps that 10 KV high-voltage alternating current introduced from a power grid side passes through a three-phase rectifier module and then is conveyed to a multi-modular charging station, and finally an electric vehicle is charged through a charging gun. The system comprises: a rectifier module used for converting high-voltage alternating current into direct current; and a current conversion module which is used for converting the direct current obtained by conversion of the rectifier module into direct current meeting the charging standard of the electric vehicle. Compared with a traditional 10KV automobile charging station power conversion system, a 10KV/380V transformer is omitted; 10KV alternating current is directly converted into direct current, the voltage stress of a switch tube is reduced, and harmonic pollution is reduced; transmission is achieved through thin cables, materials are saved, and cost is reduced; and the voltage level of each converter can be reduced to kilovolt level or even lower, so that the switching frequency reaches a higher level, and the power density is further improved.

The embodiment of the invention discloses a robot positioning deployment method and device, equipment and a storage medium. The method comprises the steps: acquiring the positioning confidence degreeof a built-in sensor of the robot to a unit area; and determining whether the unit area is a to-be-deployed auxiliary positioning area or not according to the positioning confidence. The method comprises the following steps: identifying a to-be-deployed auxiliary positioning area, and subsequently selecting a corresponding deployment scheme to perform auxiliary positioning deployment according tothe value of positioning confidence. The deployment scheme includes but is not limited to label adding, pattern texture adding, UWB adding, differential GPS adding, electromagnetic environment improving, static article placing and the like. By adopting the technical means, the purpose of improving the positioning accuracy of the robot can be achieved.

The invention provides a complete machine system of an underwater robot and the underwater robot and relates to the technical field of underwater robots. The complete machine system includes: a powersupply unit, a light control unit, a power unit, a video transmission unit, a wireless image transmission unit and a signal transmission unit. One or more of the power supply unit, the light control unit, the power unit, the video transmission unit, the signal transmission unit and the wireless image transmission unit are provided with EMC modules. By arranging the EMC modules in the complete machine system, irradiation interference is reduced therewith, so that electromagnetic environment of the complete machine system is improved well.