The system adopted some over-current, over-voltage protection and current cut-off feedback circuits to improve systems reliability.

过 压 保护 和电流截止负反馈等电路来提高运行可靠性。

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Motor and inverter can be protected by the current cut-off negative feedback when motor is overload or locked-rotor.

当电机负载过载或堵转时，采用电流截止负反馈环节可保护电机和驱动器；

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It analyses some main circuits's features, including PWM signals, logic synthesis, driver and negative feedback of current cut-off and at last gives the result of experiment.

分析了各部分的电路结构及特点，讨论了PW M脉宽调制信号生成、逻辑信号综合、驱动控制及电流截止负反馈的具体应用，在此基础上给出了实验数据及结果分析。

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