JPH04371464A - Control device for elevator - Google Patents

Abstract

PURPOSE:To judge as a whole if electric power is consumed or regenerated and determine whether decentralized stand-by operation is carried out or the operation is delayed for a certain period of time by adding an electric current signal from an elevator control device per elevator when there is an elevator left behind. CONSTITUTION:A common converter device 4 for supplying a direct-current power source 3, is connected to an inverter 2 of each of elevator control devices 1. A regenerative resistance device 5 which consumes regenerated power by resistance and a condenser 6 are connected to the direct-current power source 3. At each of the elevator control devices 1, an electric current value signal 7 which is positive at power consumption and negative at regeneration is output to a group control device 8. The group control device 8 selects an empty zone and outputs a decentralized stand-by command 9 to the elevator when the elevator is left behind. And the stand-by operation in the direction to consume power is carried out when the elevator as a whole is regenerating the power and the operation in the direction to regenerate power is done when power is being consumed. Thus, energy can be saved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control system.

0002

2. Description of the Related Art In conventional elevator control devices, when an elevator has no more calls to respond to and the elevator is abandoned, the service floor is divided into several zones after a certain period of time, and one zone is selected from among the priority zones. Go to an empty zone where there is no elevator and wait in that zone with the door closed. Then, if a hall call occurs after that, it can be serviced in a short time.

0003

[Problem to be Solved by the Invention] In a group management control device with a distributed standby function, when the car is not in response to a call but is headed to the waiting floor, there is no one in the car, so the car cannot be moved in the downward direction. Distributed standby operation consumes a considerable amount of power, and distributed standby operation in the upward direction requires regenerating a considerable amount of power. However, in the conventional group management control device with a distributed standby function, the vehicle would be abandoned and the distributed standby operation would start after a certain period of time.

[0004] For this reason, if distributed standby operation in the descending direction is performed while the electric power is being consumed as the sum of the electric power of elevators other than the standby elevators, the electric power consumption will increase. Moreover, if distributed standby operation in the upward direction is performed while electric power is being regenerated as the sum of electric power of elevators other than the standby elevators, the regeneration of electric power will increase. The regenerated power is consumed by the regeneration resistor and is therefore not used effectively. As described above, there is a problem in that the power consumption or regeneration of the elevator as a whole increases, and energy cannot be used effectively.

[0005] In order to solve the above problems, the present invention prevents the power consumption or regeneration of the elevator as a whole from increasing due to the distributed standby operation, and conversely increases the power consumption or regeneration due to the distributed standby operation. An object of the present invention is to obtain an elevator control device that can reduce energy consumption and save energy.

[0006]

[Means for Solving the Problems] This invention provides a common converter device that supplies DC power to the inverter of each elevator control device, and a regenerative resistor device that is connected between the DC power sources and consumes the regenerated power with a resistor. , a plurality of elevator control devices including a capacitor connected between the DC power sources and an inverter connected to the DC power source and controlling the elevators for each car, and a distributed standby system for properly distributing abandoned elevators. It consists of a group management control device, and when there is an abandoned elevator, it adds up the current value signal from the elevator control device of each unit and determines whether the elevator as a whole is consuming power or regenerating it. If power consumption or regeneration decreases by performing distributed standby operation, perform distributed standby operation, and if it increases, delay distributed standby operation for a certain period of time until it decreases. It is characterized by this.

[0007]

[Operation] In this invention, when there is an abandoned elevator, current value signals from the elevator control device of each car are added together to determine whether the elevator as a whole is consuming electric power or is regenerating electric power. Since distributed standby operation is performed when power consumption or regeneration is reduced by performing distributed standby operation, it is possible to prevent the power consumption or regeneration of the elevator as a whole from increasing by distributed standby operation.

[0008]

[Embodiment] An embodiment of the present invention in the case of three elevators is shown in FIG. A common converter device 4 that supplies a DC power source 3 to the inverter 2 of each elevator control device 1 is connected. A regenerative resistor device 5 and a capacitor 6 are connected to the DC power source 3, which consume the regenerated power with a resistor. Each elevator control device 1 outputs to the group management control device 8 a current value signal 7 that takes a positive value when power is consumed and a negative value when regenerated.

When an elevator is abandoned, the group management control device 8 divides the service floor into several zones in advance and selects an empty zone in which no other elevators are present from among the priority zones. , performs processing to issue a distributed standby command 9 to the abandoned car. Upon receiving the distributed standby command 9, the elevator control device 1 goes to the commanded floor and waits with the door closed.

This embodiment has a main circuit configuration in which a plurality of inverters 2 are connected to a common converter device 4, and has a distributed standby function. An output port has been added, an input port for the current value signal 7 has been added to the group management control device 8, and the process shown in FIG. The difference is that it incorporates the processing shown in the flowchart. The operation of this embodiment will be explained according to FIG.

[0011] When the vehicle is abandoned (step 101)
In order to properly distribute the elevators, we divide the service floors into several zones in advance, select an empty zone with no other elevators from the priority zones, and set the representative floor of that zone as A. Let B be the floor of (
Step 102). Among the current value signals 7, those of other machines are added and set as C (step 103). A and B are compared (step 104) (step 105), and A>B
Then, in the distributed standby operation in the ascending direction, electric power is regenerated in this operation, so if all other elevators are consuming electric power with C>0, step (106), the distributed standby command 9 is immediately issued.
(Step 107). If all other elevators do not have C>0 at this time, the distributed standby command 9
I don't give out. When A<B, the dispersing machine operates in the downward direction, and this operation consumes power, so when C<0 (step 109), a dispersion standby command 9 is issued. In this case as well, C<
If it does not become 0, the distributed standby command will not be issued until the timeout occurs within a certain period of time (step 110).

[0012] According to this embodiment, unless a certain time limit is exceeded and a timeout occurs, distributed standby operation in the direction of regenerating electric power is performed when all other elevators are consuming electric power, The power supplied by converter device 4 can be reduced. Moreover, the distributed standby operation in the direction of consuming electric power is performed when all other elevators are regenerating electric power, and the electric power consumed by the regenerative resistor device 5 can be effectively used for the distributed standby operation.

[0013]

[Effects of the Invention] According to the present invention, unless a certain time limit is exceeded, distributed standby operation in the direction of regenerating power is performed when all other elevators are consuming power, and the converter device The power to be supplied can be reduced. Further, the distributed standby operation in the direction of consuming electric power is performed when all other elevators are regenerating electric power, and the regenerated electric power can be effectively used to perform the distributed standby operation. Therefore, it is possible to obtain an elevator control device that can reduce overall power consumption or regeneration through distributed standby operation, thereby saving energy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an elevator control device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the elevator control device shown in FIG. 1;

[Explanation of symbols]

1...Elevator control device
2...Inverter 3...DC power supply
4...Converter device 5...Regenerative resistance device
6...Capacitor 7...Current value signal
8... Group management control device 9... Distributed standby command

Claims (1)

[Claims] Claim 1: A common converter device that supplies DC power to the inverter of each elevator control device, a regenerative resistor device that is connected between the DC power sources and consumes the regenerated power with a resistor, and a regenerative resistor device that is connected between the DC power sources. A plurality of elevator control devices include a capacitor connected to the DC power supply and an inverter connected to the DC power source to control the elevators for each elevator, and a group management control device that performs distributed standby in order to properly distribute abandoned elevators. , When there is an abandoned elevator, perform distributed standby operation by adding up current value signals from the elevator control device of each unit to determine whether the elevator as a whole is consuming power or regenerating power. If the power consumption or regeneration decreases, the elevator performs distributed standby operation, and if it increases, the distributed standby operation is delayed for a certain period of time until the electric power consumption or regeneration decreases. Control device.