Three phase voltage PWM rectifier based on current variable-structure control is studied and mathematic mode of PWM rectifier is analyzed in this paper.

对三相电压型PWM整流器采用电流变结构控制进行了研究，分析了PWM整流器的数学模型，详细设计了电流变结构控制器，并对其稳定性进行了分析。

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First, the mathematic model of joint position servo control system is deduced, then, the sliding mode variable structure control rule is obtained, finally experiment study is carried through.

首先推导了下位机关节位置伺服控制系统的数学模型，然后推导了在上位机上实现的滑模变结构控制率，并进行了实验研究。

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The mathematic research on stability of current control mode is discussed in this paper, and a new concept of the driver pulse width stability of the converter is proposed.

给出了峰值电流控制模式稳定性的数学证明，提出了驱动脉冲宽度稳定性概念。

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