为实现泵控马达系统输出恒转速,建立了系统的液压工作原理,通过对泵控马达调速系统的整体控制设计,确定了以STM32单片机为核心的信号控制器.系统的控制器包括硬件部分和软件部分,从而使该信号控制器将PID控制与PWM信号输出相结合,通过调节控制电压调整变量泵的排量,以抑制外接转速波动影响,从而实现1500r/min恒速输出.通过搭建系统实验平台,对系统的调速特性进行实验验证,得到了系统控制电流与转速的关系,以及控制信号突变对系统响应的影响.最后验证了系统在转速扰动下的调速特性,结果表明本系统具有较好的调速能力,达到国家Ⅲ类发电要求.%In order to realize the constant speed of the pump motor system,the working principle of the hydraulic system is established.Through the overall control design of the pump motor control system,the signal controller based on MCU STM32 is designed.The system controller includes the hardware part and the software part,and the controller combines the PID control with the PWM signal output.By adjusting the control voltage,the flow of variable pump is changed to constrain the influence on external speed fluctuation,and the output speed is kept at 1500 r/min.Experiments verify the characteristics of the speed governing system,and the relation between the current and speed of the system and the influence of the control signal mutation on the system response are obtained.Finally,the speed regulation characteristics of the system under the speed disturbance are verified,and results show that the control system has better speed control ability and reaches the national Ⅲ rating power generation requirement.
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