电源效率提升及纹波抑制技术研究

Research on Power Efficiency Improvement and Wave Supprssion Technology

仪控设备中,各型功能模块的供电需要通过电源模块来将工频交流电转换为其他功能模块所需直流电压,因此,电源作为交流-直流的能量转换单元,其效率直接影响了仪控设备整机的发热情况,进而影响包含了大量电子元器件的仪控设备的可靠性。同时,由于电源模块将给核测设备,过程测量设备等精密采集设备供电,其供电品质将极大影响这些设备的采集精度,传统的高效率开关电源技术将很大程度上恶化了电源品质,因此有必要在保证效率的同时兼顾电源模块的供电品质。本文结合相关应用需求,在充分调研的基础上,运用PFM调制技术,结合对应纹波抑制技术,对现有电源模块进行了改进,实现了满负载情况下效率60%->80%,纹波峰峰值<5mV的性能。

In instrument and control equipment,the power supply of each functional module needs DC voltage converted from AC voltage accomplished by power module.Therefore,as an AC-DC energy conversion unit,the efficiency of power supply directly affects the heating condition of instrument and control equipment,and then affects the reliability of instrument and control equipment containing a large number of electronic components.At the same time,because the power supply module will supply power to nuclear testing equipment, process measuring equipment and other precision acquisition equipment,the quality of power supply will greatly affect the acquisition accuracy of these equipment.The traditional high-efficiency switching power supply technology will greatly deteriorate the quality of power supply,so it is necessary to ensure the efficiency while taking into account the power supply quality of power supply module.In this paper,the existing power supply module is improved by using PFM modulation technology and ripple suppression technology on the basis of full investigation.The efficiency of the power supply module is 60%->80% under full load, and the ripple peak value is less than 5mV.