The controller make up of TMS320F2812 DSP chip, detecting circuits include sampling circuit, modulate circuit and phase locked loop and other periphery control and drive circuit.
But it is hard to realize the dual-loop instantaneous control with digital scheme, because there is delay time of sampling and computing and lack of real-time regulation for digital control.
数字控制器存在采样与计算延时,实时控制性差,采用数字控制器实现双闭环瞬时值控制比较困难。
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The use of phase-locked loop technology makes the sampling frequency synchronously follow the signal frequency and improves the calculation accuracy of sampling data.