JPS58100073A - Controller for elevator - 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 The present invention relates to an improvement in a device for controlling an elevator.

A conventional elevator control device is shown in FIGS. 1 to 3.

In Fig. 1, (1) is a speed command generator that generates a speed command signal V, and (2) is an adder that generates a deviation signal V between the speed command signal ■ and the speed signal ■ that will be output later. , (3) is a control device that inputs the deviation signal V, and (4) is a control device (
3) a car drive electric motor whose torque is controlled by (6);
) is a speed detector coupled to the electric motor (4) and generates a speed signal vt proportional to its rotation speed; (6) is the electric motor (4);
(7) is the main rope wound around the sheave (6), (3) and (9) are the heel and counterweight connected to the main rope (7). , 01 is a load detection device that detects the load in the heel (8) by detecting the displacement of the vibration isolating rubber (not shown) inserted between the car floor and the frame of the heel (8), (11) is A driving direction signal indicating the driving direction of the motor (8), and a load signal that generates a load signal V proportional to the load of the motor (4) using the output of the load detection device (to) and the driving direction signal (■). Generation circuit, θ field is load signal V
.

This is a correction signal generation circuit that applies a correction signal according to the speed command generation device (1).

! In Figure 12, A, B, and O are the cages (
8) The introvert type is at zero, 45%, and 100 points, and D, B, and O are respectively within (8) during descending operation?
li'J is zero, 45% and 100%.

In Figure 3, ■, 1 indicates the case where the weight difference between the weight (3) and the weight (9) is increased, such as in 100% load increase operation or zero-load east downward operation (hereinafter referred to as "increase load"). Speed command signal at the time of startup and acceleration, (2) is the speed command signal when raising or lowering something with almost zero weight difference (hereinafter referred to as balanced load), such as 45-inch load raising or lowering operation. ■, 3 is also zero load rising operation or 100
When lowering the above weight difference as in load lowering operation (
The speed command signals a1 to a3 are the car (8) when the speed command signals v, 1 to V are respectively
This is the acceleration, or riding comfort. The broken line indicates the case where the speed command signal V is not corrected by the output of the correction signal generating circuit θ barrel, and the solid line indicates the case where the above correction is made.

That is, the electric motor (4) is automatically controlled with high precision by the speed command signal V2 and the deviation signal V of the speed signal V%,
The car (3) travels either upward or downward.

Load detection device 4 Load signal generation circuit (lfJ) that emits an output to the load l in the heel (8) and the load 1 in the heel (8) and the lifting load 1. The correction signal generation circuit α31 generates a correction signal V, which has a % characteristic that increases on the positive side when the load is applied and increases on the negative side when the load is lowered. occurs,
Speed command signal vP during start-up and acceleration when under heavy load
As shown by the solid line, l is corrected to be slightly higher, the speed command signal vpat at the time of lowering load is corrected, and y is corrected to be lower. As a result, smooth riding comfort can be obtained as shown by the acceleration f & ~a3 through the upper load, the balanced load, and the lower load.

However, if the output error increases due to changes in the anti-vibration rubber of the load 1 detection device tC1□, appropriate correction cannot be provided, and the riding comfort deteriorates, as shown by the broken line of acceleration a 1T 63. At 0:00, a correction signal equivalent to a lowered load is applied in the case of a raised load, or a correction signal equivalent to a lowered load is applied in the case of a lowered load. Sometimes a number is given. In such a case, the riding comfort will be worse than when there is no correction signal. On the other hand, in order to check the operation of the load detection device (1), it is necessary to check the operation of the load detection device (1) frequently because it requires a lot of effort to load the weight onto the basket (8). This invention aims to improve the above-mentioned problem, and the present invention aims to improve the above-mentioned problem. When the difference between the corresponding signal and the load signal is greater than a predetermined value, the correction based on the load and driving direction is prevented, or the restart of the car is prevented, thereby preventing deterioration of riding comfort due to an abnormality in the load signal. An object of the present invention is to provide an elevator control device that does the following.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, 04) is the deviation signal v, =v, -v, and the load signal V
, and generates an output when the difference is greater than or equal to a predetermined value.The trowel is a display device that displays the operation of the load signal abnormality detection circuit (141), and the trowel is a load signal abnormality detection circuit (141 When the output is generated by the correction signal generating circuit 031, the gate circuit blocks the application of the output of the correction signal generating circuit 031 to the speed command generating device (1).Other than the above, the circuit is the same as that in FIG.

Next, the operation of this embodiment will be explained.

It is well known that the deviation signal V when the car (8) is running at a constant speed is a value proportional to the load on the electric motor (4), similar to the load deviation vw. Therefore, the load signal V.

If is normal, the deviation signal V, is proportional to the load signal vw (
v, -kv, where k is a proportionality constant).

Now, when the error in the output of the load detection device QQ exceeds a predetermined value, the difference (V,
-kV,) exceeds a predetermined value. Now, the load signal abnormality detection circuit 04) Fi ratio output is generated, and the gate circuit atb causes the correction signal generation circuit 0 to output the speed command generation device t (1).
) is prevented from applying a correction signal to As a result, the basket (
8) The speed command signal V during startup and acceleration is #! Speed command signals v, 1 to vp3 in Figure 3 (D broken line a).

As such, regardless of the load, the ride comfort is accelerated [
The situation worsens as shown by the broken line of al+a3, but at least in the case of a rising load, a correction signal equivalent to the lower load is applied, and in the case of a lowering load, a correction signal corresponding to the rising load is applied. This will prevent the ride from becoming extremely uncomfortable. In addition, since the display device 6) displays the operation of the load signal abnormality detection circuit (I4), this display allows readjustment, repair, etc. of the charge detector UO to be carried out in accordance with the 8th embodiment. Now, load signal abnormality detection circuit 0
When the load signal abnormality detection circuit (14I) generates an output, the application of the correction signal from the correction signal generation circuit to the speed command generation device (1) is blocked. (8) The restart may be prevented. In this case, it is possible to prevent driving in an uncomfortable condition as shown by the broken line of acceleration a 1Ha 3 in FIG.

In addition, the load signal v1 is compared with the deviation signal V during running at a constant speed to detect an abnormality. Since the deviation signal V during deceleration is also proportional to the load on the electric motor (4), it is clear that an abnormality in the load signal (2) can be detected even by comparing these and the load signal V.

In addition, although the speed command signal V is corrected in accordance with the load signal V, the load signal V is corrected in order to reduce fluctuations due to the ride comfort of the car (8) and the load of landing on the floor.

It is also possible to correct the control constants such as the gain 1 time constant of the control device t(3) in response to Alternatively, the restart of the car (8) may be prevented.

As explained above, in the present invention, the deviation signal between the speed command signal and the speed signal after the car starts and the load signal, or the signal corresponding to the time until the speed signal after the car starts reaches a certain value and the load signal. When the difference is greater than a predetermined value, the speed command signal or the control constant of the control device is prevented from being corrected based on the load and driving direction, thereby suppressing the deterioration of riding comfort due to an abnormality in the load signal. I can do it.

Further, when an abnormality in the load signal is detected, the restart of the car is prevented, so that it is possible to prevent the car from operating in a state where the ride is uncomfortable.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing a conventional elevator control device, Fig. 2 is a diagram showing the output characteristics of the negative 1h signal generation circuit in Fig. 1, Fig. 3 is an explanatory diagram of the operation of Fig. 1, Fig. 4 0 is a configuration diagram showing an embodiment of an elevator control device according to the present invention. (1) Speed command generation device, (2) Adder,
(3)...control device, (4)...car drive electric motor, (5)...speed detector, (8)...car, (9)
・Counterweight, αQ...Load detection device, (1st・Operating direction signal, 02)・・Load signal generation circuit, ・Correction signal generation circuit, H・Load signal abnormality detection circuit, OQ...
・Gate circuit In addition, the same parts in the diagram are indicated by the same reference numerals.
? 4 T Rr Luck ni Ichiyu Ichi Dabi'hibiki 1 East 1 Opposite - Obituary Gusuka b2 Cheer Figure 4

Claims (2)

[Claims] (1) A deviation signal between the speed command signal and the speed signal is input to the control device t, and the output of this control device controls the torque of the car drive motor, and the load signal corresponding to the car inward direction l and the driving direction is The speed command signal or the control constant of the control device is corrected accordingly,
Compare the deviation signal after starting the car with the load signal, or compare the load signal with the signal corresponding to time 14 until the speed signal reaches a constant value after starting the car, and check that the run is greater than the Qr constant value. A load signal abnormality detection circuit that operates when
and a control device for an elevator, comprising a blocking circuit that blocks the correction when the load signal abnormality detection circuit operates. (2) A deviation signal between the speed command signal and the speed signal is input to the control device, and the torque of the car drive motor is controlled by the output of this control device, and the torque is controlled according to the load signal corresponding to the inward weight of the car and the driving direction. In the device in which the speed command signal or the control constant of the control device is corrected, the deviation signal after starting the car is compared with the load signal, or the speed signal after starting the car becomes a constant value. a load signal abnormality detection circuit that compares the load signal with a signal corresponding to the time until the end of the load signal and operates when the difference is greater than a predetermined value; and a blocking circuit that prevents any of the above from restarting when this load signal abnormality detection circuit operates. An elevator control device ll characterized by comprising: