數字化控制UPS中電池電壓的檢測方法

摘要：本文基于DSP控制的UPS系統的性能要求，研究了兩種具有電氣隔離性能的蓄電池電壓檢測方法：一種方法是串行A/D檢測電壓、其轉換結果通過普通光耦由DSP的SPI口讀入；另一種方法是被測電壓先由線性光耦隔離、再由DSP內部A/D轉換。給出了實驗結果，并比較分析了它們的優缺點。 敘詞：不間斷電源，控制，數字信號處器，測量 Abstract：Two isolated measuring methods for voltage of the battery are presented in this paper to satisfy the property of a DSP-controlled UPS, The voltage can be converted into a digital result by a serial ADC firstly and the DSP read the data through SPI with general opto-couples. Or the voltage can be transferred by a linear opto-couple and then converted by an inner ADC in the DSP. The methods are analyzed and valued with experimental results given. Keyword：Uninterruptible Power Supply, Control, Digital Signal Processor, Measuring