JPS6231682A - Method of operating 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 [Technical Field of the Invention] The present invention relates to a method of operating an elevator driven by an electric motor controlled by a control converter.

[Technical background of the invention and its problems] Conventionally, elevators driven by electric motors controlled by control converters such as silice stacks and transistor stacks have been prone to failure due to overheating of the control converters and motors. In order to prevent this, a control converter and a temperature rise detector (hereinafter referred to as thermal) that accurately detects temperature rises are installed respectively, and when this thermal reaches its set temperature and starts operating, it will enter abnormal operation mode. ,
The elevator operates to the nearest floor or destination floor,
The aircraft is operated in such a way that it pauses or completely stops after landing on the floor.

However, in the above-mentioned elevator operation method, if the thermal detection temperature setting value is set to a low value, the thermal will malfunction due to overheating due to increased operation frequency, etc., and the elevator will malfunction, causing the elevator to malfunction as described above. The elevator stops or completely stops, which is not favorable in terms of service to elevator passengers. On the other hand, if the thermal detection temperature setting value is set high, it is necessary to increase the operating capacity of the control converter and electric VJ machine from the viewpoint of protection, which is not economically preferable.

[Purpose of the Invention] The present invention was made to solve the above-mentioned problems, and its purpose is to improve the operation service for elevator passengers by eliminating the suspension or complete stop of the elevator due to overheating, etc. An object of the present invention is to provide an economically advantageous method for operating an elevator, which is capable of reducing the operating capacity of a control converter and an electric motor while ensuring their protection.

[Summary of the Invention] In order to achieve the above object, the present invention provides a method for operating an elevator driven by an electric motor controlled by a control converter, in which at least one of the control converter or the electric motor is operated. The temperature is detected, and when the detected temperature reaches a first set temperature that is set to a low temperature, the elevator is operated in a manner that reduces the load on the control converter and the electric motor (hereinafter referred to as "duty").
(referred to as cOntrO+), and when the detected temperature reaches a second set temperature that is higher than the first set temperature, the elevator is operated to pause or completely stop. It is characterized by the following.

[Embodiments of the invention] An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 shows an example of the configuration of an elevator operating circuit to which the present invention is applied. In the figure, Ps and Nt are control llN#i busbars, and 1a is a switch (J'1.
(referred to as the first thermal detection switch), du
ty control command relay 3 in series to the control power supply bus P1. It is provided between Nt. Also, 2a
is a switch (hereinafter referred to as
(referred to as a second thermal detection switch), and the control l power supply bus Pt is
, Nt. Furthermore, 4b is a normally closed contact of the operation suspension command relay 4, which is connected in series with the operation preparation command relay 6 to the control IN source bus P1. It is provided between Ns. A normally open contact 5a of a control command relay (not shown) is provided in parallel with the normally closed contact 4b.

Figure 2 shows the elevator city C0ntrOI.
This figure shows an example of the circuit configuration when the door opening operation is performed. In the figure, P2 and N2 are control, power bus, and 9
is a door opening command relay, and a door opening preparation command relay I (not shown) is a door opening command relay.
The normally open contact 7a of the I device, the door close button 8b, the normally closed contact 10b of the normal operation door timer N'R device described later, and dut
The normally closed contact 11b of the door timer relay for y control operation is connected in series to the above control tllllffi.
liP'1. It is provided between Nt. In addition, the series circuit consisting of the door close button 8b, the normally closed contact iob, the normally closed contact 11b, and the door open command relay 9 has the duty CO
Normally open contact 3a of ntr01 command relay 3 and ciut
A series circuit consisting of the door timer tljIN device 11 for ycontrol operation is provided in parallel, and the above duty
A series circuit consisting of a control command relay 11, a command relay 11 3b, and a door timer relay 10 for normal operation is provided in parallel. Furthermore, the connection point between the door close button 8b and the normally closed contact 10b, and the connection point between the normally open contact 3a and the duty co.
A normally open contact 9a of the door open command relay 9 is provided between the connection point of the door timer relay 11 for ntrol operation.

Here, the door opening preparation command relay is a relay that outputs a door opening preparation command when the elevator is in the door zone, and the normal operation door timer relay 10 is an on-delay timer and duty that determines the door opening time T1 in the normal operation mode.
Control + operation door timer relay 11 is duty
contr.

Door opening time T2 in 1 operation mode (T2 > TI >
This is an on-delay timer that determines the

In addition, in the above, the first thermal and the second thermal are separately attached to an elevator control converter and an electric tiger (not shown), respectively, as shown in FIG.

The circuit shown in FIG. 2 is also provided corresponding to the control converter and the electric motor, respectively.

Next, the method of operating the elevator according to this embodiment will be described based on FIGS. 1 and 2.

Now, the temperature of the elevator control converter or electric motor (not shown) rises, and this rises to the first thermal set temperature T.
1 and the first thermal detection switch 1a closes, the duty contr.

1 command relay 3 is energized. Then, that normally open contact 3
a is closed and the normally closed contact 3b is opened, so that the duty con
The door timer relay 11 for troll operation is energized. Since this duty contr01 operation door timer relay 11 is an on-delay timer, it operates after 12 hours have elapsed from its excitation, and its normally closed contact 11b opens. As a result, the door opening command relay 9 continues to operate until the normally closed contact 11b opens, so the elevator door opening time is longer than the door opening time during normal operation (T2-TI
) time will be extended.

In this case, the button d provided in parallel with the door close button 8b
Normally open contact 3a of utility control command relay 3
Since the door-closing promotion operation is prevented, the elevator door-opening time is always secured for the 12 hours set by the duty control+driving door timer relay 11.

On the other hand, when the temperature of the elevator control converter or electric motor further increases and reaches the second thermal set temperature T2 and the second thermal detection switch 2a is closed, the operation stop command relay 4 is energized. When the normally closed contact 4b is opened and the operation preparation command relay 6 is released, the operation of the elevator is brought to a halt state. However, in this case, while the control command is being given, the contact 5a is closed and the excitation of the operation preparation command relay 6 is maintained.

The elevator does not immediately enter the rest state until it reaches the floor and the control command is turned off.

Therefore, due to the above action, the first thermal detection switch 1
If a is activated, the duty C0ntro+ operation will be performed and the door closing time of the engineering beta will be extended, which will inevitably lengthen the control downtime. The operating capacity of the plant will be reduced.

Also, compared to normal operation, the duty contr
During OT operation, even if the operation time becomes long, the operation does not go into a halt state and the operation can continue, so compared to the conventional case where the elevator is brought to a complete stop, the impact is considerably reduced, and the impact on elevator passengers is correspondingly reduced. This will lead to improved services.

Furthermore, even if duty control operation is performed, the temperature of the control converter and electric motor will further rise and the second
In the mode in which the thermal detection switch 2a operates, the elevator is in a resting state as before, so that the control converter and the electric motor can be appropriately protected from breakdowns due to overheating.

As described above, in the elevator operating method according to the present embodiment, the temperatures of the elevator control converter and the electric motor are detected, and when the detected temperatures reach the first thermal set temperature TI, which is set to a lower temperature. If the detected temperature reaches the temperature level, the elevator is operated in such a way as to reduce the load on the control converter and electric motor, that is, the car interior door close button 8b is disabled and the door open time is extended, and the detected temperature is When the set temperature T2 of the second thermal, which is set higher than the temperature of the first thermal, is reached, the elevator is operated to be in a rest state. It is possible to improve the operating service for elevator passengers by eliminating the idle state of the elevator, and it is also possible to securely protect the control converter and electric motor without increasing their operating capacity, which is also economical. It will be extremely advantageous.

In the above embodiment, the operation to reduce the load on the control converter and the electric motor involves disabling the car door close button and extending the door open time, but this is not limited to this. This can also be implemented in the same way as follows.

(a) FIG. 3 shows an example of a configuration in which duty control is performed by adjusting the speed command value. In FIG. 3, 12 is an elevator speed command circuit, and by closing the normally open contact 3a of the duty C0ntrol command relay 3 described above, the elevator is operated at a low rated speed by lowering the rated speed setting during normal operation, or By operating at a low acceleration/deceleration rate lower than the rated acceleration/deceleration setting during normal operation, the load on the control converter and the electric motor is reduced.

Fig. 4 shows a flowchart for adjusting the rated speed of the speed command, and Fig. 5 shows a flowchart for adjusting the acceleration/deceleration of the speed command. Similarly, the operating capacity of the control converter and electric motor will be reduced.

(b) Figure 6 shows the dut'yco control method using the group management control method.
This shows an example of the configuration when ntrol is performed. In FIG. 6, 13 is a group control device that manages the operation of a plurality of elevators, and when the normally open contact 3a of the duty control command relay 3 is closed, a call to the elevator in which the first thermal detection switch 1a has been activated is activated. An operation is performed to reduce the weight of the allocation. On the other hand, Fig. 7 also uses the group management control method with duty C0ntr.
This shows an example of the configuration when O1 is performed. In FIG. 7, the normally open contact 3a of the duty control command relay 3 is closed to disconnect the elevator in which the first thermal detection switch 1a has operated, and the car call operation is performed. I try to operate the vehicle only by driving the vehicle.

FIGS. 8 and 9 are flowcharts showing the outline of the operations in FIGS. 6 and 7 above,
The operating method of this embodiment also provides the same effects as described above. That is, in the operation shown in Fig. 8, the weight of group management assignment is reduced and the operation frequency is reduced, and in the operation shown in Fig. 9, the operation frequency is similarly reduced due to car call operation and abandonment condition. Control converter and electric a
The operating capacity of Sl will be reduced. In FIG. 8, ' is the newly assigned weighting coefficient of the thermal detection unit, 11. This is the weighting coefficient setting value during duty control operation.

(C) In the above embodiment, the operation of the second thermal detection switch 2a excites the operation suspension command relay 4 to put the elevator in the suspension state. It goes without saying that the elevator may be brought to a complete stop by the operation of the second thermal detection switch 2a by providing a normally open contact of the stop command relay 4 to constitute its self-holding circuit.

(d) In the above embodiment, a case was described in which the relay circuit was used. However, the present invention is not limited to this, and the present invention can also be realized using a logic circuit using a semiconductor, software, etc.

In addition, the present invention can be modified and implemented in various ways without changing the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, in the method of operating an elevator driven by an electric motor that is i-controlled by a vIllill converter, at least one of the control converter or the electric motor is provided. detects the temperature of When the temperature reaches the second set temperature, which is higher than the first set temperature, the elevator is operated in such a way that the elevator is stopped or completely stopped, thereby preventing the elevator from overheating. It is economically advantageous to improve the operating service for elevator passengers by eliminating the suspension or complete stop of the elevator, and to ensure the protection of the control converter and electric hoe while reducing their operating capacity. A method for operating an elevator can be provided.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an embodiment in which duty control is performed by opening the door, and Fig. 3 is a circuit diagram showing an embodiment in which duty control is performed by opening the door.
Fig. 4 is a flowchart for adjusting the rated speed of the speed command, and Fig. 5 is a flowchart for adjusting the acceleration/deceleration of the speed command. Fig. 6 and Fig. 7 show the group management control system and the duty control.
FIG. 8 is a flowchart showing a case where the weight of call assignment is limited by group management, and FIG. 9 is a flowchart when operation is performed separately from group management. 1a...first thermal detection switch, 2a...second
Thermal detection switch, 3...duty cont
rol command relay, 4...operation stop command wIN device, 5
a... Control command contact, 6... Operation preparation command relay. 7a... Door 14 preparation command contact, 8b... Door close button, 9... Door open command relay, 10... Door timer relay for normal operation, 11. Door timer relay for duty Control + operation, 12... Speed command circuit, 14.
...Group management device, Pi, N1. P2, N2... system t[11! Source bus line. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4m1I Figure 5 @ Figure 6 Figure 7 Figure 8

Claims (3)

[Claims] (1) In a method of operating an elevator driven by an electric motor controlled by a control converter, the temperature of at least one of the control converter or the electric motor is detected, and the detected temperature is set to a lower temperature. When the first set temperature is reached, the elevator is operated in such a way as to reduce the load on the control converter and the electric motor, and the detected temperature is set to a higher temperature than the first set temperature. 1. A method for operating an elevator, characterized in that when the second set temperature is reached, the elevator is operated to be in a paused or completely stopped state. (2) Operations that reduce the burden on the control converter and electric motor include operations that disable the car door close button and extend the door open time, and low-speed operations that lower the rated speed setting during normal operation. Claim (1) characterized in that at least one of rated speed operation and low acceleration/deceleration operation that lowers the rated acceleration/deceleration setting during normal operation is performed. How to operate an elevator. (3) Elevators should be centrally controlled by group management, and operations that reduce the burden on the control converter and electric motor include disabling the door close button inside the car and extending the door open time; Low rated speed operation that lowers the rated speed setting during normal operation, low acceleration/deceleration operation that lowers the rated acceleration/deceleration setting during normal operation, operation that changes elevator weight assignments using group management centralized control, The elevator according to claim (1) is characterized in that the elevator performs at least one of the operations such as waiting with the door open and responding only to car calls outside of the centralized management control. how to drive.