CN202296658U - Device for detecting running direction of power-off emergency leveling of elevator - Google Patents

Abstract

The utility model relates to the technical field of elevators, in particular to an elevator power-off emergency leveling running direction detection device, which includes a frequency converter that can automatically perform up compensation or down compensation for the torque direction of the elevator every time the elevator is started, and is used for storing EEPROM for uplink compensation or downlink compensation information when the elevator starts each time, and a sine and cosine encoder that inputs sine or cosine signals to the inverter, and the sine and cosine encoder is installed on the shaft of the elevator host; The PG card that converts and isolates the signal of the encoder and outputs the control signal. The sine-cosine encoder is electrically connected to the frequency converter, and the frequency converter is electrically connected to the EEPROM. The technical solution is simple and effective, which can greatly reduce the cost of the elevator .

Description

An elevator power failure emergency leveling running direction detection device

Technical field:

The utility model relates to the technical field of elevators, in particular to an elevator power failure emergency leveling running direction detection device.

Background technique:

Elevator is a kind of vertical elevator powered by electric motor, equipped with box-shaped gondola, which is used for multi-storey buildings to take people or carry goods. As a means of transportation in the vertical direction, elevators have become important construction equipment in high-rise buildings and public places and are indispensable. With the development of computer technology, automation technology and power electronics technology, modern elevators have become typical mechatronic products.

For traditional elevators, when the elevator in progress suddenly encounters a power supply system failure (blackout, phase loss, fire), its power failure emergency leveling device will automatically switch to work, take over all control rights of the elevator, and output the electric energy required by the elevator. Run the elevator to the leveling position, open the car door to allow passengers to get out of the elevator safely. In order to save power and cost, the existing power failure emergency leveling device often controls the elevator to run at a low speed in the direction of light load after power failure. At present, it is generally adopted to judge the direction of light load by setting a weighing control load meter (by outputting a half-load signal). This technology is relatively complicated and greatly increases the cost of the elevator.

Utility model content:

The purpose of the utility model is to provide an elevator power-off emergency leveling running direction detection device for the deficiencies of the prior art. The technical solution is simple and effective, and the cost of the elevator can be greatly reduced.

In order to achieve the above object, the utility model adopts the following technical solutions:

An elevator power failure emergency leveling running direction detection device, which includes a frequency converter that can automatically perform up compensation or down compensation for the torque direction of the elevator every time the elevator starts, and is used to store the up compensation or down compensation when the elevator starts each time. The EEPROM of the compensation information, and the sine-cosine encoder that inputs the sine or cosine signal to the frequency converter, and the sine-cosine encoder is installed on the shaft of the elevator host; the frequency converter is equipped with a signal to convert, isolate and output the control signal, the sine-cosine encoder is electrically connected to the frequency converter, and the frequency converter is electrically connected to the EEPROM.

The beneficial effects of the utility model are:

The utility model describes an elevator power-off emergency leveling running direction detection device, which adopts a sine-cosine encoder to realize the non-weighing start-up, and records the direction of torque compensation every time it is started, and when the next power failure occurs, the elevator light load can be known The direction of the elevator is simple and effective, and the technical solution can greatly reduce the cost of the elevator.

Description of drawings:

Fig. 1 is a functional block diagram of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

Embodiment one

As shown in Figure 1, a kind of elevator power-off emergency leveling running direction detection device, it includes the frequency converter 3 that can automatically carry out upward compensation or downward compensation to the torque direction of the elevator when the elevator starts every time, is used for storing the elevator every time EEPROM4 for uplink compensation or downlink compensation information when starting up, and a sin-cosine encoder 1 that inputs sine or cosine signals to the frequency converter 3, and the sin-cosine encoder 1 is installed on the shaft of the elevator host; The signal of the encoder 1 is converted, isolated and output to the PG card 2 of the control signal. The sine-cosine encoder 1 is electrically connected to the frequency converter 3 , and the frequency converter 3 is electrically connected to the EEPROM 4 . Among them, preferably, the sin-cos encoder 1 is an ERN1387 sin-cos encoder 1 with a resolution of 2048rpm.

The above-mentioned a kind of elevator power-off emergency leveling running direction detection device, its detection method is that after the frequency converter receives a cycle of sine or cosine signals sent by the sine-cosine encoder 1, the PG card 2 sends each cycle signal It is decomposed into 128 signals; when the elevator starts every time, the frequency converter 3 can automatically perform upward or downward compensation for the torque direction of the elevator, that is, perform upward or downward torque compensation to prevent the elevator from slipping backwards; if the elevator starts every time When the elevator is up compensation, a certain bit of EEPROM4 is 1; if the elevator is down compensation every time the elevator starts, this bit of EEPROM4 is 0; when the next power off, it will automatically judge the direction of the light load of the elevator, if the power off The front frequency converter 3 automatically performs upward compensation, which means that the weight of the car is lighter than the counterweight at this time, and the emergency leveling is upward after power failure; if the frequency converter 3 automatically performs downward compensation before power failure, it means that the weight of the car is If the weight ratio is heavy, the emergency leveling will run downward after power failure. The elevator power-off emergency leveling running direction detection device described in the utility model adopts the sine-cosine encoder 1 to realize the non-weighing start-up, and records the direction of torque compensation at each start-up. The direction of loading, the technical solution is simple and effective, which can greatly reduce the cost of the elevator.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (1)

1. An elevator power-off emergency leveling running direction detection device is characterized in that: it includes a frequency converter (3) that can automatically perform upward compensation or downward compensation to the moment direction of the elevator when the elevator starts each time, and is used to store elevator EEPROM (4) for uplink compensation or downlink compensation information at each startup, and sinusine or cosine encoder (1) for inputting sine or cosine signals to the inverter (3), the sincosine encoder (1) is installed on the shaft of the elevator main machine ; The frequency converter (3) is provided with a PG card (2) that converts and isolates the signal of the sin-cos encoder (1) and outputs a control signal, and the sin-cos encoder (1) is electrically connected to the frequency converter (3), the frequency converter (3) is electrically connected to the EEPROM (4).