Bus current analysis of high power cryocooler's controller

Current analysis was an important research content for reducing power of cryocooler’s controller. Simulation was done among load current, H bridge current and power current refer to 42V bus power voltage. Then relationship among I L1 , I C1 , ρ and I M1 was established. Simulation results indicate that I L1-max , I L1-ave , I L1-rms , I C1-min and IC1-ave were linearly increasing to ρ and I M1 , especially I L1-rms ≈ 0.612ρ I M1-max . I C1-rms increase firstly then decrease with the increasing of ρ. I C1-rms reaches maximum when ρ=0.8, then I CL-rms =(12.32/R M1 + 0.98) exp -((ρ-0.78)/0.57) 2 . The results were useful for miniaturizing cryocooler’s controller.