Elevator control system provided with controllable rectifier and control method thereof

Abstract

The invention discloses an elevator control system provided with a controllable rectifier, and the system provided by the invention comprises a precharging module, the controllable rectifier connected with the precharging module, an inverter connected with the controllable rectifier and a controller which is connected with the precharging module, the controllable rectifier and the inverter. The invention also provided a control method of the elevator control system provided with the controllable rectifier, and the method the following steps of: controlling the on and off of an IGBT (insulatedgate bipolar transistor) module in a rectification IGBT module by virtue of the controller according to an acquired signal, converting the three-phase current of the controllable rectifier into a direct current, and outputting the direct current; and controlling the on and off of an upper bridge arm and lower bridge arm IGBT module of each series circuit in an inversion IGBT module by virtue of the controller, and converting the direct current input by the inverter into a variable alternating current used for controlling a subsequent motor to operate. The system provided by the invention has the beneficial effects that the rectification process is controllable, no feedback equipment independent from the rectifier is required, and the total harmonic component is less than 3%.

Description

technical field [0001] The invention relates to an elevator control system and a control method thereof, in particular to an elevator control system with a controllable rectifier and a control method thereof. Background technique [0002] In today's rapid economic development, green energy saving has become an important manifestation of sustainable social development, and the concept of "green" has also become the mainstream of the elevator market. Green, energy-saving and environmentally friendly elevators are very likely to become the leading products in the elevator market in the future. With their core technologies, they will be able to master the initiative in the next step of competition. The research on green, energy-saving and environmentally friendly elevators mainly focuses on the aspects of elevator manufacturing, configuration, installation, and use of energy saving and environmental pollution reduction. In the elevator control system, the elevator inverter, as ...

AI Technical Summary

Problems solved by technology

It can be seen that in order to increase the energy return rate, additional equipment is required

[0009] 3. Since the power supply of the elevator system is usually directly connected to the power supply network of the building, and the rectifier of the prior art is uncontrollable, the level of feedback is prone to problems such as asynchrony and harmonics, making the elevator system one of the largest sources of pollution

[0010] In addition, most of the control systems in the prior art have insufficient protection measures, and are prone to errors and other problems in emergencies

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