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Application of frequency converters in energy saving of escalators

2026-04-06 07:51:03 · · #1
0 Introduction With the development of science and technology, electrical equipment is constantly being updated, and the power supply is becoming increasingly tight. Since last year, some large cities in southern China have experienced intermittent power outages, seriously affecting people's daily lives. Given that the power supply problem cannot be solved immediately, the first consideration should be energy conservation and consumption reduction. 1 Feasibility Study Currently, conventional escalators still operate at their rated speed when unloaded. This results in high energy consumption, significant mechanical wear, and a short service life. For example, the Jilin Guomao Shopping Center has 16 escalators, each with an electrical power of 8kW, consuming approximately 70kWh per day. They operate for 11 hours a day at a constant speed, and in most cases, the escalators operate below 2/3 of their rated passenger capacity, with each escalator accumulating approximately 5 hours of unloaded time per day. If the escalators were to stop or slow down when unloaded, electricity consumption would be greatly reduced. Changing the escalator operation mode from continuous constant speed operation to normal constant speed operation when passengers are using the escalator, and slowing down or stopping when unloaded, would achieve the goal of energy conservation. After consulting numerous resources, this method was deemed entirely feasible. Through research and experimentation, a frequency converter was added to the escalator's electrical control circuit, and this function could be achieved with simple modifications. Using frequency conversion speed regulation to control the escalator's operation ensures smooth start-up and energy-efficient operation. When no one is using the escalator, it switches from its rated speed to a low speed, saving energy and reducing mechanical wear. When a passenger approaches, the escalator starts and runs at normal speed; after the passenger leaves, the escalator slows down to a low speed or stops, waiting for the next passenger. If passengers are continuously using the escalator, it runs continuously at normal speed until the last passenger leaves. [Download full text PDF: Application of Frequency Converters in Escalator Energy Saving]
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