51results about How to "Strong redundancy" patented technology

The invention discloses a robust control method based on SSR-KDF for a grid-connected inverter. An output signal of a direct current bus voltage control ring, which is controlled by PI, serves as a reference value for output current of the grid-connected inverter, a tracking value of an actual value of the output current and a differential signal are extracted from an output end of the grid-connected inverter and serve as an input signal of a grid-connected inverter controller to be input into the gird-connected inverter controller, an indirect control signal of the grid-connected inverter is output and obtained after calculation, and the reference value for the output current of the inverter is subtracted from the indirect control signal of the grid-connected inverter to obtain actual control quantity of the inverter so as to control the grid-connected inverter. By the robust control method, running stability of a system is improved, halting failure caused by factors such as uncertainty on a system structure is avoided, grid-connected power quality is improved, and harmonic distortion of output electric energy of the grid-connected inverter is effectively reduced.

The invention discloses a high-efficiency multi-turn flat copper wire braided spiral winding motor stator comprises a stator body, a trough body, insulating paper and flat copper wires. The trough body is arranged on the stator body, the insulating paper is arranged between the inner wall of the trough body and the flat copper wires, the flat copper wire includes a first phase line group A, a second phase line group B and a third phase line group C, the first phase line group A, the second phase line group B and the third phase line group C are set in a braided spiral winding mode. Through theabove mode, the high-efficiency multi-turn flat copper wire braided spiral winding motor stator of the invention has the advantages of high slot full rate, short stator end and relatively copper wiresaving, the used flat copper wires are not entangled, the heat dissipation performance is good, the efficiency is high, and the fault tolerance and redundancy are high.

The invention discloses a network-based mobile multimedia fusion communication device, which relates to the technical field of communication. The equipment includes: a high-strength portable movable box, and a ground signal access device, an underground signal access device, an underground signal monitoring device and an underground signal control device located in the high-strength portable movable box, wherein the The underground signal access device is connected to the ground signal access device, the underground signal monitoring device is connected to the ground signal access device and the underground signal access device, and the underground signal control device is connected to the ground The signal access device, the underground signal access device and the underground signal monitoring device are connected. The equipment provided by the present invention is not only small in size and mobile, but also has short construction period, high network integration, few failure points, strong environmental adaptability, strong fusion communication ability, multi-level expansion, and rapid realization of multi-data type fusion communication functions.

The invention discloses an opening and closing control system and a control method for a charging hatch cover of a new energy vehicle, including a vehicle body control unit, a charging gun locking system, a driving motor, a distance sensing sensor, an infrared high-definition camera, a visual image processor and several Mobile terminal security authentication system, distance sensing sensor, infrared high-definition camera and visual image processor are electrically connected, infrared high-definition camera takes pictures of users entering the camera range, and sends the captured user images to the visual image processor for face recognition Authentication and operation instruction recognition, the visual image processor communicates with the body control unit, and sends the face authentication result and the recognized opening and closing control command of the charging compartment cover to the body control unit; several mobile terminal security authentication systems are respectively connected with the body control unit The unit communicates and connects, and sends the safety authentication result and the opening and closing control command of the charging compartment cover to the body control unit. The invention can improve system redundancy and enhance user experience.

The invention discloses a short message transmission method and a short message transmission system, which relate to the technical field of communication and solve the technical problem of low universality of the short message transmission system in the prior art. The method provided by the invention mainly comprises the following steps of: inputting short messages generated by a plurality of systems into an identical queue to be transmitted; determining the transmission conditions of the short messages in the queue to be transmitted according to parameters carried by the short messages and preset rules, and scheduling the short messages to proper short message channels according to the transmission conditions; and transmitting the short messages to a message gateway through the proper short message channels, and transmitting the short messages to user terminals by using the message gateway. The method and the system are mainly used for information transmission.

The invention discloses a 10Kv high-voltage electricity-saving controller, which comprises a control-box body, a main circuit, an input-end control circuit and an output-end control circuit, wherein the main circuit, the input-end control circuit and the output-end control circuit arranged in a control box in a matching mode. Through the 10Kv high-voltage electricity-saving controller disclosed by the invention, the defects of high cost, poor safety, poor reliability, weak redundancy capability and the like in the prior art can be overcome to realize the advantages of low cost, good safety, good reliability and strong redundancy capability.

The invention discloses a three-level DC converter apparatus and an electric energy conversion method employing the same. The three-level DC converter apparatus comprises n three-level DC conversion modules M1, M2..., Mi,..., and Mn. The n three-level DC conversion modules are connected with each other in parallel. Each module has the same circuit structure and parameters. The electric energy conversion method provided by the invention can perform phase shift control on switch tubes in the modules and among the modules. The three-level DC converter apparatus has the following advantages: the structure is simple, the expansibility is high, the redundancy capability is high, and a low-voltage single switch tube is applied to a high-voltage large-power electric energy conversion occasion; and the control method provided by the method can improve the equivalent switch frequency of the three-level DC converter apparatus to 2n times of an original switch frequency, substantially reduces the pulsation of input current and output voltage, and accordingly greatly reduces the volume, weight and cost of an input and output filter, and at the same time, the efficiency and dynamic performance of a circuit are also enhanced.

A space-borne distributed synthetic aperture microwave radiometer system and design method, the system is composed of multiple small synthetic aperture microwave radiometer systems arranged according to a certain distributed structure, the spatial resolution of the entire system is determined by the entire distributed arrangement Determined by the maximum physical size of the antenna array. The hardware structure of all small synthetic aperture microwave radiometer systems is exactly the same, including antenna array, receiver channel array, signal acquisition subsystem, sub-band division subsystem, correlation processing subsystem, brightness temperature inversion subsystem, satellite communication subsystem, etc. The entire system adopts a distributed architecture, which has the advantages of mobility, flexibility, and strong fault redundancy; at the same time, it reduces the difficulty of system manufacturing, facilitates mass production, and reduces the cost of a single system.