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High-Order Frequency-Locked Loop: General Modeling and Design by Xiangjun Quan; Qinran Hu; Xiaobo Dou; Zaijun Wu; Wei Li is a Engineering article available to read on EtoBox.

What is High-Order Frequency-Locked Loop: General Modeling and Design about?

To improve the filtering capability of frequency-locked loop (FLL), the high-order bandpass filters FLL was proposed recently. This paper proposes a high-order FLL in synchronous (dq) reference frame where the high-order lowpass filter is adopted. A general analytical model is established for the high-order FLL. Based on the model, it is proven that the conventional highorder FLL exhibits no improvement in terms of filtering ability of the frequency estimation. Based on this analysis, a new frequency estimation loop is proposed to obtain an enhanced filtering capability for the FLL. Additionally, the proposed high-order FLL has the advantage of simple implementation compared to conventional high-order FLLs. A design example is then demonstrated and simulated to show the accuracy of the model and the effectiveness of the proposed FLL. Finally, the proposed high-order FLL is experimentally verified on a testbed using a 32-bit floatingpoint DSP TMS320F28379D at 200 MHz.

Who reads High-Order Frequency-Locked Loop: General Modeling and Design?

Author

Xiangjun Quan; Qinran Hu; Xiaobo Dou; Zaijun Wu; Wei Li

Publisher

IEEE; Institute of Electrical and Electronics Engineers; Institute of Electrical and Electoronics Engineers; Institute of Electrical and Electronics Engineers (IEEE) (ISSN 1932-4529)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)