Measurement and control method for tower crane multi-variable-frequency operation electrical energy power and measurement and control system

Abstract

The invention discloses a measurement and control method for tower crane multi-variable-frequency operation electrical energy power and a measurement and control system. The measurement and control method comprises the steps that a three-phase power supply first passes through a rectifier bridge and then rectified and filtered to form a direct current, and then a direct current is used for supplying power to the lifting frequency conversion, rotary frequency conversion and amplitude-variation frequency conversion, and then electric energy parameters of the three-phase power supply are collected by an electrical energy sampling chip and transmitted to a MCU, and then MCU calculates the total electrical energy consumption and total electrical energy generation, the maximum power consumptionis set through the MCU, and the electrical energy is reduced through a power limiting method. The measurement and control system includes the three-phase power supply which is connected with the rectifier bridge and the electrical energy sampling chip; the rectifier bridge is connected with an electrolytic capacitor set, lifting frequency conversion, rotary frequency conversion and amplitude-variation frequency conversion, and the electrical energy sampling chip is connected with the MCU. The overpower operation is avoided, and electric energy consumption is also reduced.

Description

technical field [0001] The invention relates to a method and system for measuring and controlling electric energy and power of a tower crane, in particular to a method and a system for measuring and controlling electric energy and power of a tower crane with multiple frequency conversion operations. Background technique [0002] The operation of the tower crane generally includes hoisting operation, slewing operation and luffing operation. The main factors affecting the power consumption and power consumption of the operation are the operating speed, operating acceleration and load of the three mechanisms (hoisting mechanism, slewing mechanism and luffing mechanism). Wait. In the current multi-frequency operation control of tower cranes, the tower crane controller is used to control the operating speed and acceleration of the three mechanisms; during accelerated operation, over-power operation is prone to occur, resulting in large power consumption; even when running at a st...

AI Technical Summary

Problems solved by technology

In the current multi-frequency operation control of tower cranes, the tower crane controller is used to control the operating speed and acceleration of the three mechanisms; during accelerated operation, over-power operation is prone to occur, resulting in large power consumption; even when running at a steady speed, It is also prone to power operation due to shaking due to excessive wind or sudden increase in load, resulting in large power consumption

Therefore, the existing tower cranes have the problems of easy over-power operation and large power consumption during multi-frequency operation.

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