JPS623748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elevator control device.

Conventionally, when the speed of an elevator car exceeds 90 m/min, it may not be able to reach its rated speed between the time it starts and the time it stops. This is due to restrictions on riding comfort, and in this case the vehicle must be run at a speed lower than the rated speed (hereinafter referred to as partial speed). Whether or not to run at the rated speed is generally determined depending on the number of floors (distance) to be traveled, and the maximum speed is further determined depending on the number of floors. For example, if the rated speed is 90 m/min, partial speed operation is used when operating on the 1st floor, otherwise rated speed operation, and when the rated speed is 105 m/min, partial speed operation is performed when operating on the 2nd floor or below. If the train is operating on floors 8 or above, it will operate at the rated speed.

However, the distance between each floor differs depending on the structure of the building, and in some places the distance between floors is sufficiently long that it is possible to run at the rated speed even when operating on the first floor. However, even between such floors, the vehicle travels at a partial speed as described above, so a decrease in transportation efficiency is unavoidable. Furthermore, especially in AC elevators that use induction motors as hoisting motors, running at low speeds increases power consumption and is extremely uneconomical, and the motors also generate significant heat. That is, in the feedback control type AC elevator, efficiency is highest when the elevator runs at the rated speed. In particular, when DC braking or anti-phase braking is used as a braking method during deceleration, if the DC braking or anti-phase braking is applied when the car is fully loaded, the heat generation and power consumption of the motor will be enormous. Full voltage must be applied to the motor and regenerative braking must be applied during deceleration. Therefore, determining whether or not the vehicle can travel at the rated speed becomes extremely important.

The present invention is intended to improve the above-mentioned problems, and aims to provide an elevator control device that can easily determine whether or not the elevator can run at the rated speed and select an operating mode with high transportation efficiency.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 to 7 are the floors from the 1st floor to the 7th floor, and the floor spacing is the longest between the 3rd floor 3 and the 4th floor 4, between the 1st floor 1 and the 2nd floor 2, and between the 2nd floor 2 and the 3rd floor. 3 are next and equal to each other, 4th floor 4 and 5th floor 5, 5th floor 5 and 6
The space between floors 6 and between the 6th floor 6 and the 7th floor 7 are the shortest and equal to each other. 2A to 7A are respectively cams for detecting uphill rated speed deceleration preparation points installed a predetermined distance before floors 7 from 2nd floor to 7th floor (numbers with symbols match the floors), 2B to 7B are cams 2A, respectively.
cam for detecting the uphill partial speed deceleration preparation point installed at a position closer to 2nd floor 2 to 7th floor 7 than 7A (the number of the code matches the floor), 8 is for the elevator car, 9 is for the car 8 An uphill deceleration point detector consisting of an installed switch, 10 a main rope, 11 a net sheave of a hoist, 12 a counterweight, 13 an induction motor that drives the net sheave 11, and 14 driven by an electric motor 13. A pulse generator that generates pulses proportional to the rotational speed of the electric motor 13; 15 a counter that counts the number of pulses; 16 to 19 convert input into information for an electronic computer; A converter that converts into a normal signal and outputs it; 20 is a central processing unit of an electronic computer; 21 is a code that encodes the inter-floor distance (hereinafter referred to as inter-floor codes 21a to 22f);
Read-only memory (hereinafter referred to as ROM) that stores
), the floor space where you can travel at the rated speed when operating on the 1st floor is "02", and the floor space where you can travel at the rated speed during the 2nd floor operation (between floors that do not include the area between 3rd floor 3 and 4th floor 4). is "01", and "00" is the floor space where the vehicle can run at the rated speed during 3rd floor operation (not including floors 3 and 4). For example, in an elevator with a rated speed of 105 m/min, when the distance between floors is less than 3100 mm, the
If it is more than mm and less than 6100mm, it will be "01", and if it is more than 6100mm, it will be "02". In the example, the floor codes 12a and 12b for the first floor 1 and the second floor 2, the second floor 2 and the third floor 3 are "01", and the floor codes for the third floor 3 and the fourth floor 4 are "02" and 4.
The floor code for floors 4 and 5, floor 5, 5th floor 5, 6th floor 6, 6th floor 6, and 7th floor 7 is "00". That is, the minimum floors between which the vehicle can travel at the rated speed are 1st floor 1 → 3rd floor 3, 3rd floor 3 → 4th floor 4, and 4th floor 4 → 7th floor 7.
Note that the ROM 21 also stores deceleration command values corresponding to changes in the distance from the car 8 to the scheduled stop floor (hereinafter referred to as remaining distance). 22 is a write/readable memory (hereinafter referred to as RAM) that stores data in memory addresses; 23 is a bus line for an address bus, data bus, etc.; and 24 counts pulses from the pulse generator 14 to calculate the rotation speed of the motor 13. A converter for converting into a proportional speed signal Vt, 25 an adder for calculating a deviation signal between the speed command signal Vp (output of the converter 18) and the speed signal Vt, 26 an amplifier, 27 an adder, and 28 a motor. 13 is a thyristor device that applies a voltage under firing control; 29 is a full firing signal generator that generates a full firing signal; and 30 is a car operation line.

Next, the operation of this embodiment will be explained.

Now, if car 8 is on the 3rd floor 3 and the call for the 4th floor 4 is registered, the interfloor code 21c is stored in the ROM 2.
1, determine the rated speed, and start driving. On the acceleration side, the speed command signal Vp is calculated by the central processing unit as an acceleration command signal Va which increases with time, and is output from the converter 18. On the other hand, the converter 24 outputs a speed signal Vt, and these deviation signals are amplified by the amplifier 26 and input to the thyristor device 28. With this, the speed of the electric motor 13, that is, the speed of the car 8, can be controlled with high precision. Once the speed command signal Vp reaches the rated value, that value is held thereafter. At the same time, the full firing signal generator 29 emits an output based on the output of the converter 17, the thyristor device 28 is fully fired, the rated voltage is applied to the electric motor 13, and the car 8 runs at the rated speed. . Therefore, heat generation and power consumption of the electric motor 13 can be reduced. Cart 8 is on the 4th floor 4
When the deceleration preparation point _P1 , which is a predetermined distance before the deceleration point P1, is reached and the detector 9 engages with the cam 4A, the detector 9 emits an output. When the central processing unit 20 detects this, the remaining distance calculation is started, and the deceleration command signal Vd corresponding to this remaining distance is read out from the ROM 21 and the converter 1
Output from 8. As a result, the speed command signal Vp has a shape as shown in FIG.

Next, when the car 8 travels from the first floor 1 to the second floor, the inter-floor code 21a is read from the ROM 21, partial speed travel is determined, and travel is started. At the same time, the output of the full firing signal generator 29 becomes negative.
When the car 8 reaches the deceleration preparation point _P2 , which is a predetermined distance before the second floor 2, and the detector 9 engages with the cam 2B, the detector 9 emits an output, the remaining distance calculation is started, and this remaining distance is The corresponding deceleration command signal Vd is read out as described above. This is compared with the acceleration command signal Va, and if Vd>Va, the acceleration command signal Va is
When reaching Va, a deceleration command signal Vd is generated from the converter 18, respectively. As a result, the speed command signal Vp during partial speed running has a shape as shown in FIG.

The same applies to other inter-floor operations, and the inter-floor codes and operation modes from the start floor to the stop floor are as follows.

(A) 1st floor operation with inter-floor code 02... Rated speed operation (b) Same as above but with inter-floor code 01 or less... Partial speed operation (c) 2nd floor operation with inter-floor code sum of 02 or more... Rated speed operation ( d) Same as above, but the sum of inter-floor codes is 01 or less... Partial speed operation (E) In 3rd floor operation, regardless of the inter-floor code... Rated speed operation In the example, the case of uphill traveling was explained, but downhill traveling is also applicable. It is obvious that the same implementation is possible.

As explained above, the present invention stores an inter-floor code in which each floor interval is coded according to the distance thereof, reads out the above-mentioned inter-floor code according to the inter-floor distance from when the car starts until it stops, Depending on the value corresponding to this floor code, it is possible to select whether the car is to run at the rated speed or at a lower speed.

Thereby, a driving mode with high transportation efficiency can be selected by simple calculation.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing one embodiment of an elevator control device according to the present invention, FIG. 2 is a storage state diagram of the read-only memory 21 shown in FIG. 1, and FIG. FIG. 4 is an explanatory diagram of the relationship between the car position and the speed command signal, and FIG. 4 is also an explanatory diagram of the relationship between the car position and the speed signal during partial speed running. 1 to 7... Floors from the 1st floor to the 7th floor, 2A to 7A... Cam for detecting the ascending rated speed deceleration preparation point for the 2nd floor to the 7th floor, 2
B~7B... Cam for detecting the uphill partial speed deceleration preparation point as above, 8... Car, 9... Uphill deceleration point detector, 13...
Induction motor, 20...Central processing unit, 21...Read-only memory, 21a to 21f...Interfloor code, 28
...Thyristor device, 29...All firing signal generator. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A rated speed running mode in which the car runs at a rated speed and starts decelerating when the car reaches a first distance before the floor where it should stop, and a rated speed running mode in which the car is accelerated by a predetermined acceleration command signal. When reaching a second distance from the floor that is closer than the first distance, the partial speed starts deceleration from the point where the acceleration command signal and the deceleration command signal corresponding to the remaining distance to the floor become equal. In a car that selects one of the driving modes, a storage device that stores an inter-floor code in which each floor interval is coded according to the distance, and a storage device that stores an inter-floor code that is coded according to the distance between the floors, a reading means for reading out the inter-floor code in accordance with the above, and selecting the rated speed running mode when the read inter-floor code corresponds to the first state, and selecting the above-mentioned section when the read inter-floor code corresponds to the second state; An elevator control device characterized by comprising a selection means for selecting a speed running mode.