JPH0445077A - Elevator controller - 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] [Industrial Application Field] The present invention relates to a control device for a car and a elevator, and in particular, a system that detects both the car speed and the motor speed to control the traveling speed of the car. This invention relates to a control device for a elevator.

1. Prior Art] FIG. 3 is an overall configuration diagram showing a conventional elevator control device disclosed in, for example, Japanese Unexamined Patent Publication No. 1-321272.

In the figure, (1) is a three-phase AC power supply, (2) is a drive circuit consisting of an inverter, etc., (-3) is an induction motor driven by drive circuit (2), and (4) is an induction motor (3).
(5) is the escape wheel, (6) is the elevator car, (7) is the counterweight, (8) is the lobe that connects the elevator car (6) and the counterweight (7), (9) ) is a sieve (
4) A roller that rotates according to the rotation of (1(III))
is the first speed detector that detects the rotational speed of the roller (9), (10a) is the first speed detection signal output from the first speed detector (10), and (1]) is the induction signal. Electric motor(
3) is a second speed detector that detects the rotation speed of (
11a) is the second speed detection signal output from the second speed detector (11), (12) is the speed command generation circuit, and (12a) is the speed output from the speed command generation circuit (]2). command, (13) is a speed control circuit, (13a
, ) is a current command issued from the speed control circuit (13) to the drive circuit (2).

The speed control circuit (13) of No. 111 has a control system as shown in FIG. FIG. 4 is a small 4-dimensional system diagram of the control system of the speed control circuit of the elevator control device J in FIG. 3.

In the figure, (14) is a p reducer, (]5) is a speed controller, and (], 5a) is a speed controller.
, the arrogant frequency command issued from (15), (16
) is a current amplitude calculation circuit, (6a) is a current amplitude command issued from the current amplitude calculation circuit (16), (17) is an adder, and (17a) is a current amplitude command issued from the current amplitude calculation circuit (16).
7) is the angular frequency command issued from the integrator (18), (18a) is the phase angle command issued from the integrator (18), (1) is the sine wave calculation circuit, and (19a)
~(1,9e) are sine wave current commands of U, V, and W phases, respectively.

Next, an explanation will be given of the operation of the control device for the above-mentioned control system.

For example, in gearless elevators such as ultra-high-speed elevators, the number of revolutions of the induction motor (3) is low;
The second speed detector (1) attached to the motor shaft cannot accurately detect speed. Therefore, in such an elevator, the rotation speed is increased through the roller (9) in the sheave (4), etc., and the speed is detected by the first speed detector (10). 10) from the first speed detection 81 signal 'T (10a) and the speed command generation circuit (
Compare and control the speed command (12a) from 12),
A slip frequency command (15a) is obtained.

On the other hand, if the first speed detector (10) is used to calculate the current phase angle of the induction motor (3) by vector control, the J method error of the sheave (4) and roller (9) and the sheave nib (4) Due to slippage between the roller (9) and the roller (9), it is not possible to accurately calculate the phase angle. Therefore, in such phase angle calculation, the second speed detector (1]) directly connected to the motor shaft is
Using , add the frequency command (15a) and the second speed detection signal (1, 1a) 2, calculate the phase angle command (18a) by each integration, 2, and add the sine wave calculation circuit (1
9), the current amplitude command (16a) and phase angle command (18a)
Two-phase sine wave current commands (19a) to (19c)
A current command (13a) is obtained.

Then, by issuing this current command (13a) to the drive circuit (2), the drive circuit (2) is activated by the induction motor (3).
) to control the traveling speed of the elevator car (6).

1. Problems to be Solved and Attempted by the Invention] In the conventional elevator control device as described in -1-, the first speed detector (10) and the second speed detector (],
], ) was used to detect the car speed [, te, to control the speed of the car (0).

However, if the first speed detector (10) or the second speed detector (11) breaks down for some reason, the elevator car (6) will stop and the speed cannot be controlled. figure,
It was an unusual movement. Therefore, in such cases,
A safety device (not shown) etc. is activated and the elevator car (6
) were forced to stop moving. However, the stopping position of the elevator car (6) at this time is likely to be midway between floors, and even if the rescue operation is subsequently attempted to move it to the nearest floor, an abnormal situation similar to 1-1 will occur. Due to the movement and the elevator stopping before reaching the nearest floor, the passengers were trapped inside the elevator car (6).

Therefore, this invention is effective when the force speed detector malfunctions.

An object of the present invention is to provide an elevator control device that can control the speed of an elevator car and move the elevator car to the nearest floor even in such cases.

[Means for Solving the Problems] An elevator control device according to the present invention includes a car driving means for driving an elevator car (6), and a first speed detection unit for detecting the traveling speed of the elevator car (6). - stage and the speed detected by the first speed detecting means to calculate the speed control of the nilevator car (6).
operator means and 1. The induction motor (3) of the car driving means
); and second calculation means for calculating a current phase angle of the induction motor (3) using the speed detected by the second speed detection means.
a first failure calculation means for calculating both the speed control and the current phase angle by using the speed detected by the second speed detection means when the first speed detection means fails; Second speed detector.

When the stage fails, the speed detected by the first speed detection means is used to control both the speed control and the current phase angle wave p.
.) a second failure calculation means.

[Operation] In the present invention, the speed of the elevator is controlled by the first speed detection means and the first calculation means, and the second speed detection means and the second calculation means. When the speed detection means is out of order, the second speed detection means is used instead of the first speed detection means and the first calculation means, and the first failure calculation means is used to control the elevator car. The speed control calculation in (6) and the current phase angle calculation of the induction motor (3) are performed, and when the second speed detection means fails, the second speed detection means and the second
Instead of the calculating means, the first speed detecting means is used to calculate both the speed control and the current phase angle by the second failure calculating means, thereby controlling the speed of the elevator.

[Example 1 The present invention will now be described in detail.

FIG. 1 is an overall configuration diagram showing an elevator control device according to an embodiment of the present invention. In the figure, the third conventional example shown in I-
The same reference numerals and symbols as in the figure indicate the same or equivalent components as those in FIG. 3 of the conventional example. (20a) is the first fault detection signal output from the first fault detector (20), (2]) is the second speed detector (1]) (21a) is a second failure detection signal output from the second failure detector (21).

(22) is a speed control circuit, and (22a) is a current command issued from the speed control circuit (22) to the drive circuit (2).

Further, the speed control circuit (22) numbered 1- is shown in white as the control system as shown in FIG. FIG. 2 is a system diagram showing the control system of the speed control circuit of the elevator control device of FIG. 1. In the figure, the same reference numerals as those in FIG. 4 of the conventional example shown in L and the same reference numerals as those in FIG.

In the figure, (2OA) is the first failure detection signal (20a
), (2] A) is a changeover switch driven by the second failure detection signal (21a), (
23) is the first gain that intervenes when the first speed detection signal (1, Oa, Subtractor (
14) is the second gain that intervenes when it is input to 14).

Next, the operation of the control device of this embodiment having the above configuration will be explained. However, if the first speed detector (10) and the second speed detector (1, 1) operate normally, the speed of the elevator is controlled in the same manner as in the conventional example, so in this case The explanation of is omitted.

For example, if the first speed detector (10) malfunctions, the first failure detector (20) will detect this and the safety device (not shown) will be activated, causing the elevator car to (6) Movement stops. After that, the first failure detection signal (20a
) activates the selector switch (2OA) [2, subtractor (
14) is inputted by multiplying the second speed detector (1°1-a) by the second gain (24). Comparison control with the speed commands (1, 2a) from the speed command generation circuit (12) is then performed. Further, the second speed detection signal (1], , a) is input as is to the adder (17), and the slip frequency command (1, 5a) and the second speed detection signal (11a)
Phase angle calculation is performed by adding and integrating.

That is, if the first speed detector (10) fails,
The second speed detection signal (
Elevator speed control calculations are performed using only 11a).

On the other hand, if the second speed detector (1) fails, the second failure detector (21) detects this (3, the safety device (not shown) is activated, and the elevator The car (6) is moved or stopped. After that, the second failure detection signal (21a,
) activates the selector switch (21A) 2, and this time,
A first gain (23
) is the second speed detection signal (1, 1, a
) is input to the subtractor (], 4. ), and 4;,
c phase angle calculation is performed.

In addition, the first speed detection signal (10a
) is entered as it is, and comparison control with the speed command (12a) is performed. That is, the second speed detector (11)
If the first speed detector 4 (10a) is out of order, calculations for elevator speed control are performed using only the first speed detector 4 (10a).

Then, the current command (22a) is sent from the speed control circuit (22).
) is issued to the drive circuit (2), the drive circuit (2) drives the induction motor (3), and the running speed of the elevator car (6) is controlled.

As described in 1-1, in the Ushi-Beta control device of this embodiment, 1. Elevator car (6) by induction motor (3)
a first speed detecting means comprising a first speed detector (10) for detecting the running speed of the car (6) via a roller (9); Using the speed detected by the speed detection means 1, the elevator car (
6) a first calculation means consisting of a speed control circuit (22) that performs speed control calculations; and a second calculation means consisting of a second speed detector (11) that detects the rotational speed of the induction motor (3). a second calculation means comprising a speed control circuit (22) that calculates a current phase angle of the induction motor (3) using the speed detected by the second speed detection means; When the first speed detection means fails, the second speed detection means performs both speed control and current phase angle calculation using the speed detected by the second speed detection means.
O) and a speed control circuit (22) when the first failure calculation means and the second speed detection means fail, the speed is controlled using the speed detected by the first speed detection means. and a second failure calculation means consisting of a second failure detector (21) and a speed control circuit (22) for calculating both current phase angle and current phase angle.

Therefore, when the first speed detector (10) and the second speed detector (11) are constantly operating, the speed control circuit (22) calculates and controls the speed of the elevator car (6). , the current phase angle of the induction motor (3) is calculated. Then, the current command (22a) from the speed control circuit (22) is not issued to the drive circuit (2).
) drives the induction motor (3) 1, and the machined beta cage (6
) is controlled by j°].

Additionally, if the first speed detector (10) fails,
Every time the 18th fault detector (20) is activated and the second speed detection signal (1], a) from the second speed detector (11) is input to the speed control circuit (22), Calculation of speed control of elevator car (6) and induction motor (3)
) is calculated. On the other hand, if the second speed detector (1]) fails, the second failure detector (21) moves to 0 and the first speed detector (]0) By inputting the speed detection means (1(') a, ) to the speed control circuit (22), calculation of the speed control of the golevator cage (6) and current phase angle of the induction motor (3) are performed. An operation is performed. b) 5) Similarly to 1), the current command (22a) from the speed control circuit (22) is issued to the drive circuit (2), and the drive circuit (2) drives the induction motor (3) (5). , j, [, the running speed j'i of the noveter car (6) is controlled.

Therefore, even if the first speed detector (10) or the second speed detector (11) fails, the elevator car (
Since the correct speed control of 6) is performed, a safety device (not shown) is activated as in the conventional case 7, and the movement of the elevator car (6) is stopped.
6) Even if the robot stops between floors, it can be moved to the nearest floor by predetermined speed control by rescue operation or the like. As a result, passengers are no longer trapped inside the elevator car (6).

By the way, in 1-Hypertrophy, the speed detector (10th)
) or the second speed detector (11) fails,
Normal first speed melon detector (10) or second speed detector I
The speed control calculation and the current phase angle calculation 74 are performed using the Ii device (11), but the rescue operation ζ and the known ζ
``You may move the nearest floor 11, 11/Beta car (6) 6, reduce the speed by 4 from normal, and continue operation at [7] and a failure has occurred. Memory, or alert “
4. The control device for the J elevator of the present invention has the following advantages:
A car drive means for running the elevator car, a first speed detection means for detecting the running speed of the elevator car, a first calculation means for calculating the speed control of the elevator car, and a rotational speed of the induction motor. When the second speed detection means for detecting A, the second calculation means for calculating the current phase angle of the induction motor, and the first speed detection means fail, both of the above calculations are performed. A first failure calculation means and a second failure calculation means that performs both of the above calculations when the second speed detection means fails, the first speed detection means and the second speed detection means When the speed detection means always operates, the speed of the elevator is controlled by the first speed detection means and the first calculation means, and the second speed detection means and the second calculation means, When the first speed detecting means fails, the second speed detecting means is used in place of the first speed detecting means and the first blasphemy means to detect the first malfunction. The calculation means calculates the speed control of the elevator car and the current phase angle of the induction motor,
In addition, when the second speed detection means fails, the second speed detection means is used instead of the second speed detection means and the second calculation means to detect the second speed detection means. Since both the speed control and the current phase angle are calculated by the above-mentioned calculation means, even if the first speed detector or the second speed detector fails, the speed of the elevator can be controlled and the passenger can get to the elevator car. The user will no longer be trapped inside the vehicle, improving safety.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an elevator control device according to an embodiment of the present invention, FIG. 2 is a system diagram showing a control system of a speed control circuit of the elevator control device shown in FIG. 1, and FIG. FIG. 4 is a system diagram showing the control system of the speed control circuit of the elevator control device of FIG. 3. In the figure, 1: Positive phase AC power supply 2: Drive circuit 3: Induction motor 6: GoL novator cage 9: Roller 10: First speed detector 1]: Second speed detector 20: First failure detection 21: Second failure detector 22: Speed control circuit. In addition, in the figures, the same symbols and the same symbols indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A car driving means having an induction motor for driving an elevator car, a first speed detection means for detecting a running speed of the elevator car, and a speed detected by the first speed detection means. , a first calculation means for calculating the speed control of the elevator car; a second speed detection means for detecting the rotational speed of the induction motor; a second calculating means for calculating the current phase angle of the motor; and when the first speed detecting means fails, the speed detected by the second speed detecting means is used to perform the speed control and the current phase angle. A first failure calculation means that performs both calculations; and when the second speed detection means fails, the speed detected by the first speed detection means is used to calculate both the speed control and the current phase angle. 1. A control device for an elevator, comprising: second failure calculation means for performing the following: