The invention relates to an electric proportional control device and method for an electric forklift, and belongs to the technical field of electric forklift control. The electric proportional control device comprises a microprocessor, a proportional amplifier, a feedback circuit, an electro-hydraulic proportional valve and a hydraulic system; the proportional amplifier is used for proportionally amplifying the control signal; the feedback circuit is used for carrying out PID adjustment on the PWM signal; and the hydraulic system is used for controlling the forklift pallet fork to work. After the microprocessor is started, the microprocessor receives a control signal and sends out a corresponding PWM control signal, operation and power amplification are carried out through the proportional amplifier, then current sampling is carried out, and then an electro-hydraulic proportional valve is driven to control a hydraulic system. The feedback circuit converts the sampling current into a voltage signal through a current signal, the voltage signal is subjected to DC amplification and then fed back to the microprocessor, PID adjustment is carried out on a PWM signal, and a closed-loop control system is formed. The power utilization proportion control method and device for the electric forklift have the advantages of being high in reliability, high in anti-interference capacity, high in control precision, easy to operate and maintain and the like.
本发明涉及一种电动叉车用电比例操纵装置及装置方法,属于电动叉车操纵技术领域,其包括微处理器,比例放大器,反馈电路,电液比例阀和液压系统;比例放大器用于将控制信号成比例放大;反馈电路用于对PWM信号进行PID调整;液压系统用于控制叉车货叉工作。微处理器启动后,微处理器接收到控制信号,发出相应的PWM控制信号,然后经由比例放大器进行运算和功率放大,然后电流采样,再驱动电液比例阀控制液压系统;反馈电路将采样电流经过电流信号转化为电压信号,经过DC放大,再反馈给微处理器,对PWM信号进行PID调整,构成闭环的控制系统。本发明提供的电动叉车用电比例操纵方法及装置具有可靠性高、抗干扰能力强、控制精度高、易于操作和维修等优点。
Electricity proportion control device and method for electric forklift
一种电动叉车用电比例操纵装置及方法
2023-09-08
Patent
Elektronische Ressource
Chinesisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
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