Super capacitor energy-storage type elevator driver

Abstract

The invention relates to a super capacitor energy-storage type elevator driver which mainly comprises a diode three-phase uncontrollable rectifier, a three-phase inverter, a three-phase alternating current variable-frequency motor, a voltage-stabilizing filter capacitor, a super capacitor group, a first current limiting circuit, a second current limiting circuit, a direct current side voltage detecting circuit, a super capacitor group end voltage detecting circuit, a super capacitor group current detecting circuit, a signal conditioning circuit and a set of driving and controlling circuits, wherein the diode three-phase uncontrollable rectifier is connected with a three-phase electric network, the three-phase inverter comprises IGBT (Insulated Gate Bipolar Transistor) antiparallel diode moulds, and DSP (Digital Signal Processing) is used as the control core of the set of driving and controlling circuits. The invention changes the energy-saving scheme of feeding braking energy back to the electric network, energy is stored in the super capacitor group, and on-the-spot utilization is realized, thereby not only more conveniently and efficiently realizing energy saving, but also lowering the cost of the elevator driver, improving the operating safety of an elevator, and achieving popularization and application values.

Description

【Technical field】 [0001] The invention belongs to the technical field of elevator energy saving, in particular to a super capacitor energy storage type elevator driver. 【Background technique】 [0002] According to the recent statistics and forecasts of the national special equipment authority, the number of elevators in my country has reached more than 1 million units, with an annual growth rate of more than 15%. It is the world's largest elevator producer and largest elevator consumer. At present, the total energy consumption of buildings in China accounts for 29% of the total power output, and that of western developed countries accounts for 30% to 40%. According to the energy consumption of other equipment running in the building, the energy consumption of elevators accounts for 5-15% of the energy consumption of the entire building. Elevator is a big power consumer, how to improve the energy saving level of elevator has become a topic of common concern of the country an...

AI Technical Summary

Problems solved by technology

Although these devices can feed back the braking energy of the elevator to the power grid, it is still a technical problem that has not yet been fully resolved. It will have a certain negative impact on the power grid, and the amount of feedback energy is difficult to detect. A set of inverters will undoubtedly greatly increase the cost of the elevator, and the control is complicated and difficult to achieve

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