Double synchronous phase-locked loop (DDSRFL_SPLL) is a digital control technology, which can realize high-precision and high-reliability voltage modulation control when applied to AC voltage modulation control. This technology is widely used in power electronics and control fields.

The principle and implementation of dual synchronous phase-locked loop (DDSRFL_SPLL) can be found in the following e-books:

1. Digital Control System (by Lin Gongyi): This book is a systematic teaching material of digital control system, in which the principle and implementation of DDSRFL_SPLL are introduced in detail.

2. AC Motor Drive Technology and Application (Author: Yang Chen, Xie Derong): This book mainly introduces AC motor drive technology and its application, in which the application of DDSRFL_SPLL in AC motor drive is described.

3. Power electronics application technology based on DSP (by Chen Hui): This book is professional, and introduces the power electronics application technology based on DSP, in which the principle and implementation of DDSRFL_SPLL are described.

These books are authoritative reference books in the field of power electronics, which can be used for your in-depth study and research.