简要分析了双向进气型脉冲管制冷机中存在的直流现象及其抑制措施；
The paper briefly analyzed the DC-flows existing in double-inlet pulse tube cryocoolers (PTCs) and the measures for restraining them.
阴极极化：直流电通过电极时，阴极电位偏离平衡电位向负的方向移动的现象。
The cathode polarization: dc through electrode, the cathode potential deviating from the balance to the negative potential moves in the direction of the phenomenon.
7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。
The7years 'applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances.
应用推荐