【摘要】 介绍了提高数字信号处理芯片DSP片内模数转换器转换精度的过采样及其相关技术,并将过采样技术应用在智能型断路器的设计中,实现对电流和电压信号的精确采样。最后根据对单相电流分别采用常规和过采样技术进行测量和模数转换的实验结果,得出了相关的结论。更多还原

【Abstract】 This paper presents oversampling used in DSP-based intelligent circuit break-ers.Oversampling implemented with DSP enhances the resolution,precision,and credibil-ity of the load voltage and current measurements.Superposition of a triangle wave on the signal from transducers has greatly increased the SNR of sampled signals.LFP digital fil-tering is introduced for noise reduction.Experiment have shown the validity and effec-tiveness of the proposed oversampling technique in the improvement of precision and resolution of ADC.更多还原