摘要
介绍了一种供串联谐振交流耐压试验系统(ACRFSystem)使用的自动调频逆变电源。电源输出电压采用单极性分段同步正弦脉宽调制(SinusoidalPulseWidthModulation,简称SPWM)方式,实现了电源输出频率的宽范围可调,保证了输出波形的准确度。采用基于定点同步采样的离散傅里叶变换(DiscreteFourierTransform,简称DFT)得到了电容电压的相位,利用软件锁相环(SoftwarePhaselockedLoop,简称SPLL)实现了试验系统谐振频率的自动跟踪。
A frequency-tuned power supply for ACRF system is introduced in this paper.The unipolarity SPWM strategy is applied in DSP controller for achieving wide frequency range of output voltage.Based on DFF algorithm in the synchronous fixed sampling condition,the phase of the capacitor voltage is gained and the tracing of the system resonant frequency is realized.
出处
《电力电子技术》
CSCD
北大核心
2006年第6期71-73,共3页
Power Electronics
