Study Of Large-power Bistable Electromagnetic Valve And Its Drives Circuit In The Railroad Turnout Control System

Based on the previous studies and researches on the status of large-power bistable electromagnetic valve in and out of China, this study analyzes the advantages and disadvantages of large-power electromagnetic valve in current project applications, and creatively designed a new electromagnetic valve and its outer drives circuit.The starting power of a common electromagnetic valve can reach 400N, which is much lower than those used abroad. In addition, the response time is much longer. The authors of this paper have successfully designed a new type of electromagnetic valve including a permanent magnet part and a electromagnet part, based on electromagnetic and electro-dynamic theories.Based on a large amount of magnetic theoretical calculations, the initial model has been set up, which is supplemented by Ansoft magnetic field simulation. The designers have been in strict accordance with the distribution of the magnetic circuit simulation curve and the overall stress distribution curves. The structure of solenoid valve has been greatly rationalized and optimized. At the same time, further tests have been carried out in order to restructure and improve magnetic Road, and thus to ensure that all design parameters are accurate. At the same time, because of a need for high-power, this design employed high-voltage circuit breakers as a control method to enforce the current breaker protection and other related protections. Based on a large amount of magnetic theoretical calculations, the initial model has been set up, which is supplemented by Ansoft magnetic field simulation.The designers have been in strict accordance with the distribution of the magnetic circuit simulation curve and the overall stress distribution curves. The structure of solenoid valve has been greatly rationalized and optimized. At the same time, further tests have been carried out in order to restructure and improve magnetic Road, and thus to ensure that all design parameters are accurate. At the same time, because of a need for high-power, this design employed high-voltage circuit breakers as a control method to enforce the current breaker protection and other related protections.In this way, system storage ability and reliability have been greatly improved. What's more, response time of bitable electromagnetic valve has been shortened, which is close to ms grade. With regard to the opening force, under an ideal condition, the initial pressure is around 580N. So this better design is very innovative comparing to the previous studies and applications. ANSOFT simulation experiments and theoretical calculations show that this design is more reasonable, and the structure of permanent magnet part and electromagnetic part is optimized to a greatest extent. The layout of magnetic line is also reasonable, and effective role of the magnetic field tends to maximize the overall stress; In addition, the design fully taken into account the impact of electromagnetic, circuit reliability and other factors, when the current is large. The power system meets the requirements of the project and the control system works in good conditions. This design has achieved the expected goal to make bitable electromagnetic valve in good dynamic performance.