Self-adaptive control method of elevator emergency operation

Abstract

The invention discloses a self-adaptive control method of elevator emergency operation, which can reduce the elevator cost, enables the elevator emergency operation to be more intelligent, adopts a smaller spare power supply in the elevator emergency operation, and has higher reliability. The self-adaptive control method comprises the following steps of: firstly, carrying out short circuit on U, V, W phases of a permanent magnet synchronous motor, simultaneously opening band-type brakes and sliding an elevator car for a period t, wherein within the period t, a central control unit of an elevator detects the current of any two of U, V, W phases to obtain the car operation direction and the operation speed v1, when the v1 is within (1 / 10v0, v0), the car naturally slides to a flat bed; when v1 is in 1 / 10v0, a spare power supply supplies power for the permanent magnet synchronous motor, and the elevator car is equidirectionally driven to the flat bed according to the sliding direction of the elevator, or the elevator car does not move in the period t, and the spare power supply supplies power for the permanent magnet synchronous motor so as to drive the elevator car to ascend or descend to the flat bed, when v1 is more than v0, the spare power supply supplies power for the permanent magnet synchronous motor, and the elevator car is reversely braked to the flat bed according to the sliding direction of the elevator, wherein v0 is a rated elevator speed; and passengers come out when the elevator reaches the flat bed.

Description

technical field [0001] The invention relates to the technical field of elevator control, in particular to an adaptive control method for elevator emergency operation. Background technique [0002] At present, the relatively advanced adaptive control method for elevator emergency operation mainly includes the following steps. First, the elevator central control unit judges whether the elevator car should go up or down through sensors (such as load cells), then releases the brake, and passes the backup power Power is used to drive the permanent magnet synchronous motor (ie, the elevator traction motor) to run, so that the elevator goes up or down and finally leveled. After leveling, the elevator door is opened to release the passengers, and then the elevator door is closed to complete the emergency operation of the elevator. Although the above-mentioned elevator emergency operation self-adaptive control method has certain advantages, for example, the backup power supply can be...

AI Technical Summary

Problems solved by technology

Although the above-mentioned elevator emergency operation self-adaptive control method has certain advantages, for example, the backup power supply can be made relatively small, but sensors must be installed. , the signal from the sensor to the central control unit is susceptible to interference, so the use of sensors will reduce the reliability of elevator emergency operation, and on the other hand increase the cost of the elevator. In addition to the above defects, the existing elevator emergency operation adaptive control method During the whole process of emergency operation, the backup power supply is always driving the permanent magnet synchronous motor, without intelligent control according to the actual operating conditions of the elevator, which is not conducive to further reducing the backup power supply and reducing energy consumption

Images