System Design and Characteristic Analysis of Variable Frequency Hydraulic Crane

The hydraulic crane widely used at present has low efficiency, high noise and maintenance cost; it is difficult to meet the requirements of the development of energy conservation and environment protection. The hydraulic variable frequency speed regulation makes use of variable frequency motor to adjust the working speed of the quantitative pump, thereby regulating the output flow of the quantitative pump, and solving the problem of power matching from the source. The motor system is always in an efficient working state, thus avoiding the high-speed continuous operation of the motor and the hydraulic pump, improving the reliability, the service life and the energy utilization rate of the equipment. The design scheme of variable frequency hydraulic speed control system are put forward and its operating characteristics are analyzed in this paper.