The Design Of The Charging System Of An Quantitatively Magnetizing Machine

With the rapid development of magnetic materials, magnetic materials gradually come into all areas of modern industrial production. The magnetizing machine is essential for not only producing magnetic materials and the process of developing magnetic materials-related products, but also the properties of magnetic materials. The magnetizing machine designed In this topic, which improved to Traditional Magnetizer, and the remanence permanent magnet can be quantitatively adjusted.Magnetizing machine is mainly made up of the charging system and charge-magnetic system. Charging system provides storage of energy to magnetizing machine, which transform into the magnetic field energy through the charging system. Charging system is related to efficiency of the whole system and accuracy of magnetization. The thesis describes the design of magnetization Charging system, which needs to adopt a quasi-constant current charging mode to achieve the quantitative charge storage capacitor, then expound the details of the various parts of the system hardware and software design.The system is combined with move regulator SCR technology and switching power supply technology, and adopts PWM to control full-bridge DC-DC converter circuit of capacitor charging constant current quantitative. C8051F020 as the core of controlling circuit, according to the principle of quantitative magnetization on the energy storage capacitor voltage requirements, transform the DC input voltage, and the circuit parameters in real-time acquisition A/D conversion algorithm based on quasi-constant current control algorithm and quantitative magnetization IGBT The turn-on and off, to achieve quasi-constant current charging. Voltage and current parameters collected exchange data through the two-plane communication and magnetization system, and then measured by the LCD display.For the Power Magnetizer, charging power circuit design minimizes the impact of electrified wire netting as soon as possible, reducing charging time and increasing productivity. In order to ensure stable and reliable work of charging system, this topic designed EMC, overvoltage, over current and thermal protection circuits. Charging system designed for this project can only use 200ms to quantitative charge the 0-900V, 4400uf, capacitor, which has the characteristics of small size, low cost and low power consumption.