基于STM32的数字移相器系统设计

Design of Digital Phase Shifter System Based on STM32

数字移相器是由移相变压器、数字式相位显示仪、电压电流数显表及电源等单元组成的新一代便携式电工仪器,既能满足三相移相的要求,又能满足单移相器的要求。针对这个原理,设计了基于STM32的一种数字移相器。通过STM32内部ADC+DMA的方式将采集到的外部信号直接存储到缓冲区,再通过将缓冲区的原始信号数据送至DAC进行输出,通过EC11旋转编码器控制输出信号的相移,从而实现数字移相器的功能。通过测试,该系统可在原始信号上实现手动连续可变相移,且有设备简单,效率高等优点。

The digital phase shifter is a new generation of portable electrical instruments composed of phase-shifting transformers, digital phase displays, voltage and current digital display and power supply units, which not only meet the requirements of three-phase phase shift, but also meet the requirements of single-shift Phase of the request. Aiming at this principle, a digital phase shifter based on STM32 is designed. Through the STM32 internal ADC ＋ DMA way to collect the external signal is stored directly to the buffer, and then by the buffer of the original signal data sent to the DAC output, EC11 rotary encoder control the output signal phase shift, in order to achieve digital Phase shifter function. Through the test, the system can be achieved in the original signal manual continuous variable phase shift, and the device is simple, high efficiency.