| 王迪， 马钧华.基于TMS320F28379D和Σ Δ调制的旋变软件解算系统[J].轻工机械,2021,39(5):58-63 |
| 基于TMS320F28379D和Σ Δ调制的旋变软件解算系统 |
| Rotary Transformer Decoding System Based on TMS320F28379D and Σ Δ Modulator |
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| DOI：10.3969/j.issn.1005 2895.2021.05.011 |
| 中文关键词: 伺服控制 TMS320F28379D芯片 旋转变压器 Sigma Delta(Σ Δ)采样 锁相环 |
| 英文关键词:servo control TMS320F28379D rotary transformers Sigma Delta sampling phase locked loop |
| 基金项目: |
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| 中文摘要: |
| 针对旋转变压器解算困难及专用解算芯片存在二次延时等问题，课题组提出了基于TMS320F28379D的旋变软解算系统。基于旋转变压器与Σ Δ采样，设计了Σ Δ与ADC双路采样电路；采用反正切法实现旋变开环解码；采用基于锁相环原理的双精度数字R/D转换电路实现旋变闭环解码。实验结果表明闭环解码相比于开环解码，以极小延迟为代价提高了位置解算精度。旋变软解算系统能实现旋变的精确解码并降低解算延时。 |
| 英文摘要: |
| In order to solve the problem of the resolver′s difficulty in solving and the second time delay of the special solving chip, a resolver soft solution system based on TMS320F28379D was proposed. A dual sampling circuit of Σ Δ and ADC was designed based on the resolver and the Σ Δ sampling. The arctangent method was used to realize the resolver open loop decoding; the double precision digital R/D conversion circuit based on the phase locked loop principle was used to realize the resolver closed loop decoding. The experimental results show that compared with open loop decoding, closed loop decoding improves the accuracy of position calculation at the cost of minimal delay. The resolver soft solution system can realize accurate resolver decoding and reduce the solution delay. |
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