We present a new digital phase lock technology to achieve the frequency control and transformation through high precision multi-cycle group synchronization between signals without the frequency transformation circuit....We present a new digital phase lock technology to achieve the frequency control and transformation through high precision multi-cycle group synchronization between signals without the frequency transformation circuit. In the case of digital sampling, the passing zero point of the phase of the controlled signal has the phase step characteristic, the phase step of the passing zero point is monotonic continuous with high resolution in the phase lock process, and using the border effect of digital fuzzy area, the gate can synchronize with the two signals, the quantization error is reduced. This technique is quite different from the existing methods of frequency transformation and frequency synthesis, the phase change characteristic between the periodic signals with different nominal is used. The phase change has the periodic phenomenon, and it has the high resolution step value. With the application of the physical law, the noise is reduced because of simplifying frequency transformation circuits, and the phase is locked with high precision. The regular phase change between frequency signals is only used for frequency measurement, and the change has evident randomness, but this randomness is greatly reduced in frequency control, and the certainty of the process result is clear. The experiment shows that the short term frequency stability can reach 10-12/s orders of magnitude.展开更多
为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有...为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有的模拟控制电路相比，其结构简单。实验结果表明，系统调速范围可达到10～1000r／min，有较宽的调速范围。展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11173026the International GNSS Monitoring and Assessment System(iGMAS)of National Time Service Centre
文摘We present a new digital phase lock technology to achieve the frequency control and transformation through high precision multi-cycle group synchronization between signals without the frequency transformation circuit. In the case of digital sampling, the passing zero point of the phase of the controlled signal has the phase step characteristic, the phase step of the passing zero point is monotonic continuous with high resolution in the phase lock process, and using the border effect of digital fuzzy area, the gate can synchronize with the two signals, the quantization error is reduced. This technique is quite different from the existing methods of frequency transformation and frequency synthesis, the phase change characteristic between the periodic signals with different nominal is used. The phase change has the periodic phenomenon, and it has the high resolution step value. With the application of the physical law, the noise is reduced because of simplifying frequency transformation circuits, and the phase is locked with high precision. The regular phase change between frequency signals is only used for frequency measurement, and the change has evident randomness, but this randomness is greatly reduced in frequency control, and the certainty of the process result is clear. The experiment shows that the short term frequency stability can reach 10-12/s orders of magnitude.
文摘为了提高电动机的控制性能，用高性能微处理器DSP（Digital Signal Processor）和IPM（Intelligent Power Module）对已有的模拟控制系统进行了改进。系统由DSP最小系统、智能功率驱动模块、隔离模块等组成，用DSP汇编语言编程。与现有的模拟控制电路相比，其结构简单。实验结果表明，系统调速范围可达到10～1000r／min，有较宽的调速范围。
