Double main unit driven escalator or walkway

Abstract

The invention discloses an automatic escalator or a sidewalk that is driven by a double main machine, which includes a drive device, a first main machine and a second main machine that are connected in parallel, a control device and a load detection device, wherein, the load detection device is utilized to detect a load state signal of the escalator or the sidewalk and output the signal to the control device; the control device is utilized to judge the load state and control the drive unit to drive the first main machine to work independently or drive the first main machine and the second main machine to work at the same time. The automatic escalator or the sidewalk has the advantages that the escalator or the sidewalk is controlled by a double main machine independently, and the power of the main machines can be combined conveniently; the main machine can have different running states that can be adjusted according to the load state so that the two main machines can work at the power nearest to their rated load, so the working efficiency and the power factor of the main machine can be improved, the service life can be prolonged; meanwhile, the invention can save energy and the operation is safe and reliable.

Description

technical field [0001] The invention relates to an escalator or a sidewalk, in particular to an escalator or a sidewalk driven by dual hosts. Background technique [0002] The current escalators or sidewalks are mostly driven by dual main motors. The two main motors drive the sprockets on the left and right sides through couplings or directly to realize the transportation of people or goods. The two main motors adopt a unified control method, that is, two The main motors run or stop at the same time. Such as figure 1 Shown is the working characteristic diagram of the asynchronous motor, the efficiency η and power factor of the motor There is a corresponding relationship with the output power P2 of the motor. When the motor is unloaded, the efficiency of the motor is 0, and the power factor is also very low, about 0.1 to 0.2. As the load increases, the efficiency and power factor of the motor increase rapidly. But when the load exceeds the rated load of the motor, the eff...

AI Technical Summary

Problems solved by technology

Usually, 80% of the time when the escalator or sidewalk is running, the number of passengers is less than half of the rated number. Therefore, most of the running time, the load of the escalator or sidewalk is low. , In the operation mode where two main motors work at the same time, the load shared by each main motor is very low, resulting in low efficiency and power factor of the main motor, insufficient effective utilization rate, and poor energy saving effect

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