Research Of Non-contact High Power Engine Ignition System

This paper discusses the research and design of a contactless high-energy electronic ignition device.The non-contact high-energy electronic ignition device mainly provides ground ignition and emergency ignition for a new type of engine.For the technical requirements of this type of engine,the newly developed ignition device should have high reliability,high safety,convenient maintenance,and excellent performance.The characteristics of long-term stable work under harsh conditions.The advanced nature of the product is small,light weight,high ignition energy,can meet the needs of the engine ignition,etc.,can be extended to other areas,with very important significance.Firstly,according to the requirements of the non-contact high-energy electronic ignition device,the working principle and main parameters of the ignition device are analyzed.The mathematical model of the ignition device is established.Based on this model,the MATLAB simulation is performed and the simulation results can be satisfied.Project requirements.Secondly,in order to improve the stability of the main circuit of the ignition device,the design adds a loop compensation and feedback link.Through the small signal modeling analysis of the ignition device,the compensation principle and the parameter setting of the compensation feedback link are determined.The loss analysis is performed on the system,and a rectifier diode with a lower conduction voltage drop is selected and the clamp voltage is increased to reduce the loss and increase the efficiency.Next,the circuit design of each part of the igniter is elaborated.Considering that the load of the converter is a storage capacitor,in order to improve the reliability of the converter,a single-ended flyback circuit structure is adopted in this paper.A frequency divider circuit is used to divide the high-frequency pulse to generate a low-frequency pulse of 1.4 Hz to control the firing point of the igniter.Considering that there are diodes in the input power supply,the system power supply voltage should be greater than 9V,and the ignition device can work.A low-voltage protection circuit is designed to prevent the input voltage from being too low and affect the system.A current detection circuit and a capacitor voltage feedback circuit are designed to limit the current and voltage of the main circuit to ensure reliable operation of the igniter.The ignition circuit uses a small thyristor to trigger a high-power thyristor scheme.The DC voltage output by the power converter charges the capacitor and discharges through an oscillating discharge circuit.Finally,according to the project requirements,complete the manufacture of non-contact high-energy electronic ignition devices.According to the working requirements of the ignition device,the ignition device is tested,including electrical performance test analysis and physical performance test analysis,and the test results are analyzed.