用于高压电能表的新型电源管理单元设计

Design of a New Power Management Unit Used for High Voltage Watt-hour Meters

新型高压电能表具有计量精度高、低功耗、信息化、智能化等优点,获得了越来越多的应用;论文对新型电能表计量装置的供电需求进行了探讨,在此基础上设计了一基于感应电流取能的新型电源管理单元,在稳压器输入端增加了电能智能存储功能,确保在极端工作条件下,电能表仍具有计量、数据存储、无线抄收等功能,避免了因利用该技术出现断电及断电重启时刻导致的计量损失;测试结果表明,电源管理单元能够确保电能表在极端情况下稳定工作4.5小时。

New high voltage watt--hour meters have the advantages of high precision measurement, low power consumption, informationization, intelligence, etc. which are selected in more and more applications. This paper researched on the power supply of the new metering devices, designed a new power management unit based on induction current energy harvesting. The unit introduced a smart electrical energy storage function between the voltage regulator and the energy harvesting coil, made sure the metering devices can operate stably, avoided the metering losses due to the power off of the metering devices. The experimental results showed that the storage electrical energy could supply for 4.5 hours without the energy harvesting.