精密功率电源中一种新的波形移相方法

A Novel Waveform Phascshift Method in the Precise Power Source

精密功率电源中,一般采用数字合成技术产生正弦信号,而波形移相可通过改变其波形计数器的初值实现,然而这种移相方法的硬件电路比较复杂。为此,本文给出了一种新的波形移相方法。实践证明,基于该方法研制的三相精密功率电源具有较高的精度和稳定度(失真度<0.5％,稳定度<0.05％)。

In the precise power source, the digit synthesis technology was used in general for producing the sine-wave and the waveform phaseshift was realized by changing the initial value of the wave counter. But the circuit of this phaseshift method is very complex. In order to simplify the circuit ,this paper provides a novel waveform phaseshift method . The practice proves that the three-phases precise power source based on this method is very accurate and stable (distortion: <0.5%,stability : <0.05%).