The adopted control mode of previous common frequency converter is usually of open loop constant voltage ratio, which its control curve is not stable.
早期通用变频器大多为开环恒压比的控制方式，控制曲线不稳定。
An internal model control strategy is proposed to a class of open loop stable nonlinear systems described by fuzzy neural networks.
针对一类开环稳定的非线性系统，提出了一种基于模糊神经网络的非线性内模控制方案。
On control, speed closed loop controlling based PID is utilized and the stable run of motor is realized.
在控制方法上采用基于PID方法的速度闭环控制，实现了电机的稳定运转；
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