【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。更多还原

【Abstract】 A frequency-tuned power supply for ACRF system is introduced in this paper.The unipolarity SPWM strate-gy is applied in DSP controller for achieving wide frequency range of output voltage.Based on DFT algorithm in the syn-chronous fixed sampling condition,the phase of the capacitor voltage is gained and the tracing of the system resonant fre-quency is realized.更多还原