KR20100110555A - Elevator system and control method for the same - Google Patents

Abstract

PURPOSE: An elevator system and a control method for reducing power loss are provided to stably operate the rising and descent operation of the elevator by operating the brake to threefold. CONSTITUTION: An elevator system includes a driving motor, an elevation car(130), a balance weight(140), a wire rope(115), a sensing unit and a controller. The elevation car is descended with the drive motor each driving force. A balance weight operates the elevation car. The wire rope is at the same time connected to the drive motor, the elevation car and balance weight. The sensing unit measures the weight of the man loaded in the elevation car or cargo. A plurality of drive motors is operated respectively selectively.

Description

Elevator system and control method for the same

The present invention relates to an elevator, and more particularly, to an elevator system capable of operating efficiently and a control method thereof.

In recent years, various types of elevators have been developed and installed that can move more passengers more quickly and efficiently as buildings rise.

As is well known, the elevator is a transport means for moving up and down along a hoistway, which is a predetermined space formed vertically in the interior of a building, to safely move passengers or cargo, etc. between floors.

1 is a schematic view showing a conventional general elevator system structure.

As shown in the drawing, a conventional general elevator includes a guide rail (not shown) firmly installed on both side walls of a hoistway, a hoist car 11 for lifting / lowering along the guide rail, and the hoist car 11. And a balance weight 12 connected to the wire rope 14 and lifting / lowering opposite to the elevator car 11 along a guide rail installed vertically on the rear wall of the hoistway, and installed at the top of the hoistway. It consists of a drive motor 13 in frictional contact with the wire rope 14 to move the elevator car 11 and the balance weight 14 by the forward and reverse rotation.

However, in the conventional elevator system shown in FIG. 1, only one drive motor 13 is used, and in this case, the size of the drive motor 13 is large.

In addition, for such a large drive motor 13, a machine room for installing the drive motor and the various devices must be provided separately in the upper part of the building, resulting in inefficient use of space.

In addition, a large torque and large output drive motor 13 is used, and there is a problem in that manufacturing cost, lifting, fixing cost, etc. are high.

In order to improve the above, an elevator system for elevating one elevator car with two small drive motors has been developed.

2 is a schematic view showing another embodiment of such a conventional elevator system.

The conventional elevator system of another type shown in Figure 2 is connected to the hoisting car 23, which is lifted / lowered along the guide rail (not shown), the hoisting car 23 and the wire rope 25 and the A counterweight 24 that lifts and descends opposite to the elevator car 23 along a guide rail installed perpendicular to the rear wall, a fixed pulley 26 to which the wire rope 25 is connected, and the elevator car 23. ) And two driving motors 21 and 22 which frictionally contact the wire rope 25 at both sides of the lower part of the balance weight 24 and the lift car 23 and the balance weight 24 by forward and reverse rotation. )

In this case, the space of the machine room can be reduced by miniaturizing the drive motor and installing it on the lower side of the building. However, the two drive motors are operated at the same time, and the two drive motors must be operated at the same time when the elevator car stops. There was a problem that accurate control was not easy.

The present invention has been made to solve the above problems and disadvantages, the object of the present invention is as follows.

First, an object of the present invention is to reduce power loss by operating a lift car using two drive motors and simultaneously raising and lowering a lift car using only one drive motor depending on the situation.

Second, the purpose of the control is to install the brake unit on the wire rope as well as the drive motor itself to control the elevator car more accurately and stably.

In order to achieve the above object, the present invention provides a plurality of drive motors, the lifting car is lifted / lowered by the driving force of the drive motor, the balance weight that operates in opposition to the lifting / lowering operation of the lifting car, the drive motor and the lift Wire rope connected to the car and the balance weight at the same time, a sensing unit for measuring the weight of the person or cargo mounted on the lifting car and a control unit for controlling the drive motor according to the weight measured by the sensing unit Provide an elevator system.

Here, the brake unit may be configured to further stop the lifting / lowering operation of the elevator car.

In addition, the driving motor may be provided with an auxiliary brake unit capable of stopping its operation.

In addition, it may be configured to further include a power generation unit connected to the wire rope to convert the lifting / lowering operation of the elevator car into electrical energy.

And, the drive motor is composed of two, one can be installed on the upper side and the other on the lower side.

On the other hand, the present invention operates an elevator system comprising a lifting car that is raised and lowered, a plurality of motors for operating the elevator car, a balance weight rising and falling opposite to the elevator car and a control unit electrically connected to each of the motors and the balance weight. The method of claim 1, further comprising: inputting the weight of the balance weight, detecting the weight of the elevator car, comparing the weight of the balance weight with the measured weight of the elevator car, selecting a motor to be operated from among a plurality of motors, and selecting It provides an elevator system control method characterized in that it comprises a step of operating a motor.

Referring to the effect of the elevator system and the control method of the present invention configured as described above are as follows.

First, after considering the total weight and the weight of the balance weight, such as a person on board a car or loaded on board, it is possible to drive only the necessary drive motor to drive the power consumption can be reduced.

Second, a brake unit is provided in each of the upper and lower driving motors, and a brake unit that stops the wire rope is separately provided. It has the effect of being stable.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

Of the accompanying drawings, Figure 3 is a schematic diagram showing an elevator system according to an embodiment of the present invention, Figure 4 is a block diagram showing the relationship between the main configuration of the elevator system according to an embodiment of the present invention.

As shown in Figure 3 and 4, the elevator system according to an embodiment of the present invention comprises a drive motor (110, 120), elevator car 130, balance weight 140 and wire rope 115.

Here, the drive motor is installed divided into the first drive motor 110 and the second drive motor 120 in the upper and lower, respectively, connected to the rotary shaft of the drive motors (110, 120) installed in the upper and lower at any time When the drive motor is operated, the wire rope 115 is installed to move along a predetermined path including a hoistway.

As shown, the wire rope 115 forms a closed loop type, and the first driving motor 110 is connected to the uppermost end, and the second driving motor 120 is installed at the lower end.

In addition, the elevating car 130 is connected to the wire rope 115 so that the elevating / lowering is driven by the driving force of the driving motors 110 and 120, and the elevating car 130 operates to be operated in a manner opposite to that of the elevating car 130. Counterweight 140 is connected.

In addition, the sensing unit 170 is provided to measure the weight of the person or cargo in the elevator car 130, so as to control the drive motor (110, 120) in accordance with the weight measured by the sensing unit (170) The controller 180 is provided with a microcomputer.

In addition, the brake unit 150 is provided on the wire rope 115 to stop the lifting / lowering operation of the elevator car 130.

At this time, as shown, the upper and lower drive motors (110, 120) itself is provided with auxiliary brake units (111, 121) capable of stopping its operation, respectively.

In addition, the elevator system of the present invention is connected to the wire rope 115 is provided with a power generation unit 135 for converting the kinetic energy of the wire rope 115 into electrical energy during the lifting / lowering movement of the elevator car 130 do.

Here, the structure of the brake unit and the power generation unit is already known a number of techniques, it can be used by adopting one of them.

Referring to the operation method of the elevator system of the present invention configured as described above are as follows.

FIG. 5 is a flowchart illustrating an operation process of the elevator system of the present invention. Referring to the attached FIGS. 3 to 5, first, the balance weight is provided in the control unit 180 provided as a microcomputer in the elevator system of the present invention. Input the weight of 140 (S10).

In addition, while the elevator car 130 moves up / down, the weight of the person or the cargo mounted on the elevator car 130 is sensed together with the weight of the elevator car 130 (S20).

Next, the controller 180 compares the weight of the balance weight 140 previously input and the measured weight of the elevator car 130 (S30), the first drive motor 110 and the second drive motor 120 ) To select the motor to operate (S40). Then, the selected driving motor is operated (S50).

In this case, only one driving motor may be selected and operated from two driving motors, and both driving motors may be operated.

For example, in more detail, when the weight of the balance weight 140 is 1 ton and the total weight of the lift car 130 and the mounted person is 4 tons, the first driving motor 110 and the second, respectively. When operating the drive motor 120 at the same time, when the weight of the balance weight 140 is 1 ton and the weight of the elevator car 130 is 1.5 tons, only one drive motor of the two drive motor is to be operated.

That is, when a large load is applied to the elevator car 130, both driving motors are operated, and when a small load is applied to the elevator car 130, one drive motor is not particularly different from the counterweight. By selecting only to operate the power to prevent power loss and to increase the life of the elevator system as a whole.

In this case, when only one of the two selected driving motors is to be operated, when the elevator car 130 is raised, the first driving motor 110 located at the upper side is operated and the elevator car 130 is operated. When descending, it may be desirable to operate the second driving motor 120 located below.

On the other hand, the elevator system of the present invention by operating the power generation unit 135 is installed to enable the generation of power when the wire rope 115 is moved, necessary for lighting and other control unit 180 inside the elevator car 130. Lighting can be obtained by self-powering method.

In addition, the brake units 111 and 121 are installed in each of the first driving motor 110 and the second driving motor 120, and a separate brake unit 150 is provided to directly brake the wire rope 115. It can be installed to selectively activate some of the brake units if necessary to enable accurate braking.

On the other hand, Figure 6 is a schematic diagram showing the structure of an elevator system according to another embodiment of the present invention.

The elevator system according to another embodiment of the present invention as shown in FIG. 6 includes an elevator car 210, a driving motor 220, a moving pulley 230, a fixed pulley 240, and a wire rope 250. do.

Here, the wire rope 250 is installed to move along a predetermined rail according to the operation of the drive motor 220, the moving pulley 230 is connected to the wire rope 250 and at the same time It is installed to move up and down.

In addition, the fixing pulley 240 is fixed to the upper ceiling and the like, and the balance may be installed on the wire rope 250 to move relative to the elevator car 210 as in one embodiment.

In the elevator system according to another embodiment of the present invention configured as described above, when the wire rope 250 moves by the operation of the driving motor 220, the movable pulley 230 moves up and down a certain height while the elevator car moves up and down. 210 goes up / down.

In this case, even if the moving length of the wire rope 250 itself increases, the driving motor 220 may move the lifting car 210 with a small force.

And, the structure according to another embodiment shown in FIG. 6 is also applicable to the elevator system according to an embodiment of the present invention shown in FIG.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

For example, in the above embodiment, the first driving motor is installed at the upper part and the second driving motor is installed at the lower part so that the lift car can be moved up and down, but the plurality of first driving motors are located at the upper part. After each of the two second drive motors are installed to be connected to the wire rope, only the selected drive motor may be operated according to the weight of the lift car.

1 is a schematic view showing a conventional general elevator system structure;

2 is a schematic view showing another embodiment of a conventional elevator system;

3 is a schematic view showing the structure of an elevator system according to an embodiment of the present invention;

Figure 4 is a block diagram showing the relationship between the major components of the elevator system according to an embodiment of the present invention;

5 is a flowchart showing the operation of the elevator system of the present invention; And

Figure 6 is a schematic diagram showing the structure of an elevator system according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: first driving motor 111, 121: auxiliary brake unit

115: wire rope 120: second drive motor

130 Car 135: Power Generation Unit

140: counterweight 150: brake unit

170: sensing unit 180: control unit

Claims (6)

A plurality of drive motors; A lift car which is lifted / lowered by the driving force of each of the drive motors; A balance weight that works in opposition to the lifting / lowering operation of the elevator car; A wire rope connected to the driving motor, the elevator car and the balance weight at the same time; Sensing unit for measuring the weight of the person or cargo mounted on the elevator car; And A control unit for selectively operating the plurality of driving motors according to the weight measured by the sensing unit; Elevator system is configured to include all. The method of claim 1, Elevator system characterized in that it further comprises a brake unit for stopping the lifting / lowering operation of the elevator car. The method of claim 1, The drive motor, An elevator system, characterized in that the auxiliary brake unit is provided to stop the operation. The method of claim 1, Elevator system, characterized in that further comprises a power generation unit for generating electrical energy during the lifting / lowering operation of the elevator car. The method of claim 1, The drive motor is composed of two of the first drive motor and the second drive motor, An elevator system, characterized in that the first drive motor is installed in the upper portion, the second drive motor is installed in the lower portion. In the method of operating an elevator system comprising a lifting car that rises and lowers, a plurality of motors for operating the elevator car, a balance weight that rises and descends as opposed to the elevator car, and a controller electrically connected to each of the motors and the balance weight, Inputting the weight of the counterweight; Detecting the weight of the elevator car; Comparing the weight of the counterweight with the measured weight of the elevator car; Selecting a motor to be operated from among the plurality of motors; And Operating the selected motor; Elevator system control method comprising a.

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