A new multiple-stage converter topology for high power and high precision fast pulsed current sources
A new high current, low rise time and high precision pulse generator is presented. The topology is based on the use of different stages, each one specific for a particular operation range in terms of power and switching frequency. The design and operating principle of the proposed topology are described. Finally, the results obtained from an implemented reduced scale prototype are compared with the simulation ones in order to validate the design.
Dynamic current mode power supply with a 3P 4Q PFC module and with energy recuperation ability to the mains for feeding superconducting paricle accelerator magnets
This paper presents a developed four quadrant, three phase, AC to DC converter for dynamic mode, current source power supplies with ability of energy recuperation from the load to the mains. The developed converter will be a part of universal and modular platform for current source power supplies, feeding superconducting magnets in particle accelerators. The main advantages of the developed 4Q module are the unity power factor at the input and the energy recuperation ability from the superconducting magnets to the mains. This paper presents some design aspects, performances and test results of the developed 4Q PFC converter and the developed, new power supply concept.
Fault Diagnosis and CAN Bus/Ethernet Redundancy Design of a Monitoring and Control System
The ship monitoring system is used to monitor and control the working status of various equipment on the ship. The navigational safety of the ship is affected directly by the stable working of the monitoring system. In this paper, a ship monitoring system with fault-type judgment function and bus redundancy is designed to improve system reliability and reduce fault checking cost. A redundant Ethernet/CAN bus communication network is constructed in the system, which connects multiple simulation nodes. The simulation node can simulate the faults that may occur during the communication process and feeds back the fault information to the host computer. The host computer will analyze and display the corresponding fault type on the user interface with the feedback information is received. The system reconfigures the network route autonomously when the simulation node has a communication fault. Routing of fault nodes can be switched to redundant routing, and the load balancing of the communication network can be maintained. Through experimental tests, the system can accurately locate faults and achieve fast switching of redundant routes between buses. Hence, the reliability of data transmission is improved.