JPH0428682A - Elevator speed controlling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for detecting the load inside an elevator car and controlling the speed at the time of starting.

[Prior Art] Fig. 5 to Fig. 7 are diagrams showing a conventional elevator speed control device disclosed in, for example, Japanese Unexamined Patent Publication No. 1-313285, in which Fig. 5 is an overall configuration diagram and Fig. 6 is is a block diagram of a microcomputer (hereinafter referred to as microcomputer), and FIG. 7 is a block diagram of a speed control calculation section.

In Figures 5 and 6, (1) is the elevator car, (
2) are counterweights, each of which is connected to a main rope (3), and the main rope (3) is wound around a drive mesh sheave (4). (5) is an electric motor that drives the sheave (4), (6) is connected to a three-phase AC power source (7), and is connected to a current command signal (described later).
(13a) is a power conversion circuit that supplies electric power to the electric motor (5) according to
9) is a counting circuit that counts the pulses from the pulse generator (8) and outputs a speed feedback signal (9a); (10) a load that is installed at the heel (1) to detect the load in the car and correspond to it; A load detector that outputs a signal (10a), (11) inputs a load signal (10a) and corrects the error at the time of balanced load (the load inside the car when the car (1) and the counterweight (2) are balanced). (12) is an unbalanced load input adjustment circuit that inputs the load signal (lla), corrects the error at the time of unbalanced load, and outputs the load signal (12a). The adjustment circuit (13) is a microcomputer that performs predetermined arithmetic processing, and includes a CPU (13A), a ROM (
13B), RAM (13C), input port (13D
) and an output port (13E), and an input port (13E).
D) includes a speed feedback signal (9a) and a load signal (12a).
is input, and a current command signal (
13a) is output.

In Figure 7, (16) is a speed command signal, (17) is an adder, (18) is an operational amplifier, (19) is an adder, (20)
is speed control calculation means that outputs a current command signal (13a) and is included in the microcomputer (13).

A conventional elevator speed control device is configured as described above, the load in the car (1) is detected by the load detector (10), and the load signal (10a) is sent to the input adjustment circuit (11) (1).
2) becomes the load signal (12a), and the microcomputer (1
3) is input. In the microcomputer (13), the speed command signal (16) and the speed feedback signal (9a) are added together using an adder (17), and the deviation signal is amplified using an operational amplifier (18). The signal (12a) is added and converted into a current command signal (13a) by the calculation means (20).

The current command signal (13a) is sent to the power conversion circuit (6), and the necessary power is supplied to the electric motor (5).

In other words, at startup, the weight of the heel (1) and the counterweight (
The load signal (12) is used to detect the starting impact caused by the unbalance with the weight of (2) and (1), or from running backwards.
This is prevented by introducing a) into the speed control system and correcting the torque of the electric motor (hereinafter referred to as scale activation).

Here, the balanced load input adjustment circuit (11) performs adjustment at the time of balanced load, and sets the car internal load to a value necessary for balancing the car (1) and the counterweight (2), The gain of the adjustment circuit (11) is adjusted using a rotary switch (not shown) or the like so that the load signal (10a) at that time becomes zero. In addition, the unbalanced load input adjustment circuit (
12) is for adjusting the unbalanced load.The car is started with no load inside the car, and the gain of the adjustment circuit (12) is adjusted using a rotary switch (not shown) to prevent starting impact. It is something to be adjusted.

[Problem to be solved by the invention] In the conventional elevator speed control device as described above,
Balanced load adjustment and unbalanced load adjustment are adjusted using the above-mentioned rotary switch, etc., so the load signal (
lla) and the operational amplifier (18), and the gain must be adjusted based on the measured value, resulting in setting errors caused by measuring instruments, adjustment means, etc., and problems such as insufficient compensation results being obtained. There is a point. Furthermore, it is necessary to repeatedly start and stop the system to eliminate the start-up shock, which poses a problem in that the work efficiency during installation is reduced.

This invention was made in order to solve the above problems, and is an elevator speed that eliminates setting errors caused by measuring instruments, adjustment work, etc. when adjusting the gain of a load signal, and improves the efficiency of adjustment work. The purpose is to provide a control device.

[Means for Solving the Problems] The elevator speed control device according to the present invention corrects the load signal at the time of balanced load when the first setting device for setting the balanced load adjustment mode is operated, and corrects the load signal for unbalanced load. When the second setting device for setting the load adjustment mode is operated, it is determined from the control signal in the speed control calculation means whether or not a starting impact will occur in the car, and if it is determined that it will occur, it is determined that it will not occur. until it is done.

The load signal is corrected by repeating starting and stopping.

[Function] In this invention, when the first setting device is operated, the load signal at the time of balanced load is corrected, and when the second setting device is operated, the load signal is corrected until the starting shock is no longer generated at the time of unbalanced load. Since the load signal is corrected by repeating starting and stopping, the load signal under balanced load and unbalanced load is automatically adjusted.

[Example] Figures 1 to 4 are diagrams showing an example of the present invention.
Figure 2 is a block diagram of the main parts, Figure 2 is a diagram of the overall configuration, Figure 3 is a block circuit diagram of the speed control calculation section, and Figure 4 is a flowchart showing the load signal correction operation. Similar parts to the conventional device are the same. Indicated by sign. Note that FIG. 6 is also used in this embodiment (however.

The load signal (12a) is assumed to be the load signal (10a)).

In Figures 1 and 2, (23) is a first setting device consisting of a toggle switch for setting the balanced load adjustment mode; (24)
(25) is a second setting device consisting of a toggle switch that sets the unbalanced load adjustment mode, and (25) is a first correction device that corrects the load signal from the load detector (10) when the first setting device (23) is operated. Means (26) is a starting impact determining means for determining the presence or absence of a starting impact from the control signal in the speed control calculating means (20) when the second setting device (24) is operated; (27) is a starting impact determining means for determining whether there is a starting impact. If it is determined that this is the case, the second correction means corrects the load signal by repeating starting and stopping until the starting impact disappears.

In Fig. 3, (28) is the output VS of the operational amplifier (18),
Load signal (10a), first and second setter (23) (
Load signal gain adjusting means inputs the signal of 24) and outputs the load signal OUR, n is the output of the adder (19) and is a torque command value.

Next, the operation of this embodiment will be explained with reference to FIG. The program in this flowchart is a microcomputer (13)
is stored in the ROM (13B). In addition, at the time of balanced load adjustment and unbalanced load adjustment, the load in the car (1) shall be set artificially as described above.

Now, if the first setting device (23) is operated, in step (31) it is determined that it is the balanced load mode from the signal of the first setting device (23), and in step (32) the load signal (10a
) is stored in RAM (13c) and used as the error VB.

That is, since the load signal (10a) at this time is originally zero, this measured value becomes the error WB.

Next, in step (33), the signal of the second setting device (24) is judged, but since the second setting device (24) is not operated, it is judged that it is not in the unbalanced load adjustment mode, and in step (43) ). Wait until it becomes fully automatic mode in step (43), and once it becomes fully automatic mode, go to step (44)
Then, the error VB is subtracted from the load signal (10a) taken in during normal operation while the cartoon (1) is running, and this is multiplied by a preset gain -G to obtain the load signal WOUT.
Set. This load signal WOUT is added to the torque command value S by an adder (19) to become a torque command signal tn, which is input to the speed control calculation means (20).

Next, a second setting device (23) is used instead of the first setting device (23).
4) is operated, steps (31) (33)
The process proceeds to step (34) via . Step (34)
Elapsed time since Dekato (1) started (scale adjustment time)
It is determined whether T has exceeded a predetermined time T wax. If it is less than the predetermined time Tmax, in step (35), the output (torque command value) vS of the operational amplifier (18) within the predetermined time Tmax after the car (1) is started is integrated, and the presence or absence of a start-up impact is determined. A parameter Ps for determination is set.

In step (36), the loaded load signal (10a)
From this, the error 11B set in the balanced load adjustment mode is subtracted, and this is multiplied by the gain 1IIG to set the load signal WOUT. In step (37), the load signal WOUT and the output IiS of the operational amplifier (18) are added to set the torque command signal (■). In step (38), based on the set torque command signal (2), the scale is started to compensate for the unbalanced load as described above. In step (39), the predetermined time T
A time counter T is set to determine that max has elapsed, and the process returns to step (34).

In step (34), the time counter T reaches the predetermined time Tmax.
If it is determined that the above value has been reached, the process proceeds to step (4o), and it is determined from the value of the parameter Ps whether or not there is a starting impact.

That is, if the parameter PS is close to zero, it is determined that there is no starting impact, and the adjustment mote processing ends. Unless the parameter Ps is near zero.

It is determined that there is a starting shock, and the process proceeds to step (41), where the gain WG is increased by a predetermined value Y and the gain G is reset.

In step (42), the parameter PS and time counter T are initialized for the next scale adjustment startup process, and step (42) is performed by initializing the parameter PS and time counter T.
Return to 34).

[Effects of the Invention] As explained above, in this invention, when the first setting device is operated, the load signal at the time of balanced load is corrected, and when the second setting device is operated, the starting shock is corrected at the time of unbalanced load. The system determines whether this occurs and corrects the load signal by repeating starting and stopping until it no longer occurs, so the load signal for balanced and unbalanced loads is automatically adjusted, eliminating human adjustment errors. This has the effect of increasing accuracy by eliminating this, and improving efficiency of adjustment work.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams showing one embodiment of an elevator speed control device according to the present invention, in which Figure 1 is a main part configuration diagram, Figure 2 is an overall configuration diagram, and Figure 3 is a speed control calculation. FIG. 4 is a flowchart showing load signal correction operation, FIGS. 5 to 7 are diagrams showing a conventional elevator speed control device, FIG. 5 is an overall configuration diagram, and FIG. is a block diagram of the microcomputer, and FIG. 7 is a block diagram of the speed control calculation section. In the figure, (1) is a cage, (2) is a counterweight, (5) is an electric motor, (1O) is a load detector, (10a) is a load signal, (13) is a microcomputer, and (20) is a speed control. calculation means, (23) a first setting device, (24) a second setting device, (25) a first correction device, (26) a starting impact judgment device, (27) a second correction device, wS The operational amplifier output, WOLIT, is the load signal. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure Figure 0a Negative 11th Street I No. 1 Corner Number Signal 0a Figure C A Figure 2a Procedural Amendment (Voluntary) July 18, 1990

Claims (1)

[Claims] A balanced load adjustment mode is set in an elevator that is equipped with a load detector that detects the load inside the car and outputs a load signal, and inputs the load signal to a speed control calculation means that controls the speed of the car. a first setting device; a second setting device for setting an unbalanced load adjustment mode; and when the first setting device is operated, the load signal is corrected when the weight of the car and the weight of the counterweight are balanced. a starting impact determining means for determining that a starting impact will occur in the car based on a control signal in the speed control calculation means when the second setting device is operated; and this starting impact determining means. and second correction means for correcting the load signal by repeating starting and stopping of the car until the car stops operating.