Design and Analysis of Constant Current Source Base on Shount-Wound Power Valve

In this paper,a high stable large current constant source is presented,which is based on power MOSFET parallel connection,and its current could be continuous adjusted between 0～10A.The working principle of the designed constant-current circuitry is analyzed in detail and deduced mathematically,and the choice of critical elements and the problems in the practical application of circuit have been explained properly as well.With the performance of the designed constant-current source tested,the results indicate that the stability of this design is better than 0.5‰,and the system has a small ripple and high reliability with long time work.