Energy-saving circuit of elevator

Abstract

The invention discloses an energy-saving circuit of an elevator. A power contactor, a duty relay, a switching power supply and a power-on relay are added between an elevator control cabinet and an elevator distribution box. Main contacts of the power contactor are connected between three-phase power lines of the elevator distribution box and the elevator control cabinet in series, the switching power supply is powered up by the elevator distribution box and outputs power to the duty relay and the power-on relay, the duty relay is connected with the power-on relay, and the duty relay and the power-on relay are respectively connected with control signal lines of the elevator control cabinet. In the energy-saving circuit, the power contactor does not work and consume no power in an energy-saving state, only the duty relay actuates and all external indicator lights work, the power-on relay consumes power only by pressing a button, and the power consumption of the power-on relay can be ignored. Elevators are used more and more day by day and the amount of elevators is large, so saved energy is tremendous, and the energy-saving circuit has a huge economic popularization benefit.

Description

technical field [0001] The invention relates to the field of energy-saving control, in particular to an energy-saving circuit for elevators. Background technique [0002] With the development of real estate, the number of elevators is increasing, among which residential elevators account for a large proportion. Due to the characteristics of residential elevators, their management adopts the continuous operation mode of 24 hours a day. The use density of residential elevators is high during commuting and commuting hours, and the frequency of use is very low at other times, especially from 10:00 pm to 6:00 am the next day. Almost no one uses them. And the fan is automatically turned off, but the control part of the elevator, the frequency converter and the internal and external display must be turned on, and these parts still need to consume a certain amount of power in vain. This part of electric energy accounts for a very small proportion of the daily energy consumption of ...

AI Technical Summary

Problems solved by technology

The motor of the elevator is sometimes in the power generation state during the working process. The excess energy generated in the power generation state is usually dissipated through the heating of the braking resistor (high-power resistor). This part of the energy is wasted and the temperature of the machine room will increase at the same time. , affecting the service life of the elevator

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