219results about How to "Good scalability" patented technology

The invention discloses a control system for a modular multilevel converter and an application method of the control system. The control system for the modular multilevel converter comprises a master control unit, M1 bridge arm control units, a group of high-speed digital buses and a group of communication buses, wherein each bridge arm control unit comprises M2 valve group control units; and each valve group control unit is used for controlling the use, the removal, the bypassing and the lockout of sub-modules in a corresponding valve group through an optical fiber, and electrically isolating the sub-modules. A sub-module voltage balancing algorithm for the modular multilevel converter consists of an intra-valve group voltage balancing part and an inter-valve group voltage balancing part. The control system and the application method are used for controlling and managing the use, the removal, the bypassing and the lockout of the sub-modules of the modular multilevel converter to realize the voltage balancing of the sub-modules of the modular multilevel converter, are applied to an application situation where the modular multilevel converter has a great number of sub-modules, and have the characteristics of modular design and high expansibility, and the design difficulty of the control system can be greatly reduced.

The invention discloses a magnetic flux feedback suspension control method and device of an EMS type low-speed aerotrain. The method comprises the following implementation steps: collecting and obtaining the magnetic flux density at the position of a suspension gap through a magnetic flux induction coil a, and collecting the suspension accelerated speed and the suspension gap; calculating a suspension system control rate according to the magnetic flux density, the suspension accelerated speed and the suspension gap; generating a closed loop to control PWM signals according to the suspension system control rate, and respectively outputting the PWM signals to a PWM driving circuit to adjust the suspension force between a suspension electromagnet and a track. The device comprises a sensor set, a data collection board, a suspension controller and the PWM driving circuit, wherein the sensor set, the data collection board, the suspension controller and the PWM driving circuit are sequentially connected. The method and device have the advantages of being good in suspension control stability, high in sensitivity, low in control bandwidth, capable of improving the stability and robustness of the suspension control system, simple, easy to implement, strong in anti-jamming capability, good in expandability, and flexible in implementation.

The invention discloses a regional health information sharing network system, which is characterized in that an application terminal device of a community health service center, an application terminal device of a village clinics/service station, an application terminal device of a large and medium-sized hospital, and an application terminal device of a third party pay for medical insurance are all in two-way data connection with a medical health information sharing platform. The system is suitable for establishing cross-platform data sharing in a certain scope mainly based on residents, and builds up a perfect platform for the construction of regional health information. Based on the platform, a plurality of application systems of different fields and different structures can be added, thus the platform has excellent expansibility, and regional health information is shared and interacted. The system has strong data integration performance; a BG-MPI module provides a strong data pairing mechanism with high accuracy; and mutual authentication of multiple service modules can be realized. Compared with the prior art, the system has outstanding substantive characteristics and remarkable improvement.

The invention discloses a method for realizing the routing of a wireless mesh network, which comprises the following steps: A. a source node sends a route request message to a surrounding intermediate node, wherein the route request message carries initial route criterion information which is provided by the source node and used for choosing routes; B. after receiving the route request message, the intermediate node updates the received route criterion information according to the network data of the intermediate node, and sends the route request message to the next node, wherein the route request message carries updated route criterion information; C. after receiving the route request message sent by the intermediate node, a destination node obtains the route criterion information of the route, and returns a route response message to the source node according to an original route, wherein the route response message carries the route criterion information of the route; and D. the source node chooses appropriate routes according to the types of services and the route criterion information of each route in the route response message returned by the surrounding intermediate node. The method for realizing the routing of the wireless mesh network and the wireless mesh network node of the invention are used for realizing service-based routing.