本文介紹了一種基于旋轉變壓器-數字轉換器芯片AD2S83 和DSP 的感應同步器測角
系統的設計與實現。本設計中通過RC 振蕩電路為感應同步器轉子提供單相激磁信號，定子上感應出來的正弦和余弦兩路信號通過儀表放大器的差分放大之后提供給基于跟蹤型測角原理的轉換芯片AD2S83，通過FPGA 實現數字邏輯控制以及地址解碼，將轉換后的16 位并行轉角數據以及方向信號送入DSP 中。本設計實現了一種穩定高效的跟蹤式數字測角系統，具有很好的擴展性。
關鍵詞：感應同步器；跟蹤型測角；前置放大；數字信號處理器
Abstract: A design of synchro goniometric system based on resolver-to-digital converter chip
AD2S83 and DSP is introduced in this paper. In this design, a single-phase exciting signal
generated by RC oscillatory circuit is applied to the rotor of synchro. The sine and cosine signals induced on stator are amplified by instrumentation amplifier and connected to the converter AD2S83, which is designed according to tracking goniometry. Digital logic control and address encoding are processed by FPGA, and the converted 16-bit parallel angle data and direction signal are transferred to DSP. This design implements a stable and efficient digital tracking angle measuring system with fine augmentability.
Key words: synchro ; tracking angle measuring; preamplifier; digital signal processor