A Study Of A New-type Self-holding Electromagnetic Valve And The Application Of Magnetic Material

This paper introduces that the united theory of high capability permanent material and electromagnetic iron designs a new-type valve with the function of self-holding and self-closedown. And the valve can not only achieve zero consumption of the self-holding state, but also is used in the intellectualized instrument that can refuse the use if the user owes money by optimizing magnetic circuit and the design of electric circuit.Firstly, it analyzes the whole framework of the valve and the working theory of the device of electromagnetism and hydraulic pressure.Secondly, it discusses the problem of material choice of the the key components-permanent magnetic iron and moving iron core in detail, according to the kinds of the present magnetic material and the characteristic of the valve itself.Thirdly, it researches the maganetic force of the permanent magnetic circuit and electromagnetic circuit in all kinds of working state. Especially, it discusses the working state and the working point of the permanent magnet. It argues the rationality and reliability of the valve that we have designed.Lastly, it designs the electric circuit. The valve achieves the function of self-closedown when the electricity is stopped by using big capacitance components and reverse pulse discharge.