Energy-saving elevator power distribution system

Abstract

The invention discloses an energy-saving elevator power distribution system. A signal sampling unit in a flywheel energy storage device of the power distribution system is used for acquiring state parameters of an electrolytic capacitor, a bidirectional energy converter, a flywheel, a flywheel motor, the power grid and an inverter in an elevator system, and the output end of the signal sampling unit is connected with the input end of an analog to digital (A / D) converter; the output end of the A / D converter is connected with the input end of a calculation control unit; the communication port of the calculation control unit is connected with a communication unit, and the control signal output end of the calculation control unit is connected with the input end of an isolation driving unit; the output end of the isolation driving unit is connected with the control end of the bidirectional energy converter; the positive end of the electrolytic capacitor is respectively connected with the positive end of the output port of a three-phase rectifier and the positive end of the direct current (DC) port of the bidirectional energy converter, and the negative end of the electrolytic capacitor is respectively connected with the negative end of the output port of the three-phase rectifier and the negative end of the DC port of the bidirectional energy converter; and a rotor of the flywheel motor is coaxially connected with the flywheel, and a three-phase stator winding of the flywheel motor is electrically connected with the alternative current (AC) end of the bidirectional energy converter.

Description

technical field [0001] The invention relates to an energy-saving elevator power distribution system, and in particular discloses a technical solution for using a flywheel energy storage device as an elevator auxiliary power supply, an energy recovery unit and a backup power supply, belonging to the field of energy and electrical appliances. Background technique [0002] With the advancement of social urbanization process, high-rise buildings continue to emerge. As a vertical means of transportation in high-rise buildings, the demand for elevators is also increasing. People's continuous pursuit of elevator safety, efficiency and comfort has promoted the progress of elevator technology. While the elevator is widely popularized and developed, the energy consumption of the elevator is also increasing at an alarming rate. As the energy problem becomes increasingly prominent, the energy-saving technology of elevators has become one of the topics that people care about. [0003]...

AI Technical Summary

Problems solved by technology

There are many deficiencies in this solution, mainly including: (1) The service life is short and needs to be replaced regularly: due to the chemical changes of the electrode active material during the working process of the rechargeable battery, the expansion and contraction of the electrode structure will be caused, which will lead to Battery performance declines, and its lifespan generally does not exceed 5 years

(2) Poor energy recovery performance: Batteries generally have poor power characteristics and cannot be charged at high power; while elevator energy feedback requires energy storage units that can be charged at high power for a short time (tens of seconds to a few minutes), the battery cannot meet this requirement. kind of request

The inconsistency of battery performance will accelerate the capacity decay of the battery pack and seriously affect the service life of the battery pack.

(4) There is a problem of environmental pollution: the metal materials after use of the battery are not easy to handle, which will cause heavy metal pollution to the environment

It can be seen that due to the limitation of its own performance, the rechargeable battery can only be used as the backup power supply of the elevator, and cannot simultaneously serve as the energy storage unit for the elevator energy feedback

Images