JP2009067521A - Control device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a power source from a second control power source to an elevator control section by cutting off an input of a first control power source when the high-temperature condition of the first control power source is detected. <P>SOLUTION: This control device for elevator comprises a first control power source 23 having a control power source section 26 for receiving supply of a power source from an alternating current power source 3 and while for supplying a direct current power source to an elevator control section 28 through a normally open contact point 22 and a transformer 24, a second control power source 51 including a storage battery 52 for supplying a power source to the elevator control section 28 through a selector switch 27, a first temperature detecting unit 41 for detecting the temperature of the transformer 24 and for generating a high-temperature detecting signal when the detected temperature exceeds a predetermined first threshold value, and a first control unit 28a for opening the normally open contact point 22 based on the high-temperature detecting signal and for supplying a power source from the second control power source 51 to the elevator control section 28 by switching the selector switch 27 from a side a to a side b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an elevator control device.

As described in the following patent document, a conventional elevator control device has a commercial power supply for supplying electric power to an elevator and a control panel for controlling the operation of the elevator. Some have an abnormality detector for detecting abnormal heat generation and a means for shutting off the commercial power supply when the abnormality detector operates.

According to such a control device, an abnormality detector is provided in the control panel, and when this operates upon detecting an abnormality in the control panel, the power supply to the control panel is cut off. Early detection is possible, and damage to the burnout in the control panel is minimized, and the entire building is not significantly affected. With this, the restoration time of elevators and the like can be greatly shortened.

Japanese Utility Model Publication No. 61-153443

However, since the control device shuts off the commercial power supply that supplies power to the elevator when the abnormal detector detects abnormal heat generation of the control appliance, when the passenger is in the elevator car, the passenger is in the car. It will be trapped in. For this reason, there was a problem that the service was extremely lowered for passengers.

The present invention has been made in order to solve the above-described problems, and has a first control power source that is normally used and a second control power source composed of a storage battery, and the first control power source has a high temperature. An object of the present invention is to provide an elevator control device that shuts off the input of the first control power supply and supplies power to the elevator control section by the second control power supply when it is detected.

An elevator control apparatus according to a first aspect of the present invention is an elevator control apparatus for controlling a car driving motor by an elevator control unit based on an AC power supply. The elevator control apparatus receives power supply from the AC power supply and includes first opening / closing means. A first control power source that supplies a DC power source to the elevator control unit via a second control power source, a second control power source that comprises a storage battery that supplies power to the elevator control unit via a second opening / closing means, and the first control power source A first temperature detecting means for generating a first detection signal when the detected temperature exceeds a predetermined first threshold, and the first opening / closing means based on the first detection signal. And a first control means for closing the second opening / closing means and supplying power from the second control power source to the elevator control section. is there.

The elevator control apparatus according to the second aspect of the invention detects the temperature of the appliance, and generates a second detection signal when the detected temperature exceeds a second threshold higher than a predetermined first threshold. It is preferable to include detection means and operation control means for stopping the car at the nearest floor based on the second detection signal.
Thereby, while preventing a passenger from being confined in a cage | basket | car, abnormal heat_generation | fever of a 1st control power supply can be prevented.

According to a third aspect of the present invention, the elevator control device closes the first opening / closing means based on the fact that the first control signal is no longer generated by operating the motor by operating the first control means. And second control means for opening the second opening / closing means.
Thus, when a high temperature detection signal is generated, the second control power supply 51 supplies power to the elevator control unit 28. When the high temperature detection signal is not generated, the first control power supply 24 supplies power to the elevator control unit 28. To do. Therefore, even if the temperature of the first control power supply 23 rises temporarily, the operation can be continued smoothly.

According to the present invention, the first control power source that is normally used and the second control power source composed of a storage battery are provided, and when it is detected that the first control power source has become high temperature, the input of the first control power source And a control device for the elevator that supplies power to the elevator control unit with the second control power source.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall view of an elevator control apparatus showing an embodiment of the present invention.
In FIG. 1, an elevator is connected from a commercial three-phase AC power source 3 via a main normally open contact 5 of an electromagnetic contactor, is connected to a converter 7 for obtaining a DC power source, and an output of the converter 7, thereby pulsating. A capacitor 8 for smoothing the voltage and an inverter 9 for obtaining a three-phase AC voltage having a variable voltage and a variable frequency are provided. And it has the three-phase motor 10 driven by the output of the inverter 9, the motor 10 is formed so as to rotationally drive the sheave 13, and a rope 14 is hung on the groove of the sheave 13. A cage 16 is fixed to one end of the rope 14, and a counterweight 18 is fixed to the other end.
Note that an encoder 12 that detects the rotational position of the motor 10 and generates a position detection signal is provided.

In addition, a control power supply unit 26 that obtains a first control power from the three-phase AC power supply 3 via a first normally-open contact 22 as a first switching means and a step-down transformer 24, and a changeover switch 27 as a second switching means. And an inverter control unit 28 for controlling the operation of the car 16 and an inverter drive unit 30 for driving and controlling the inverter 9 by a control signal from the elevator control unit 28.

Moreover, the output voltage of the 2nd control power supply 51 which consists of the storage battery 52 and the storage battery control part 54, and the storage battery control part 54 is connected to the elevator control part 28 via the changeover switch 27 as a 2nd opening / closing means. Here, the reason why the changeover switch 27 is used is to prevent a current from flowing into the control power supply unit 26 when the power supply from the second control power supply 51 is changed to the elevator control unit 28.

The temperature detection unit detects the temperature of the transformer 24 as an example of an instrument constituting the first control power source 23, and generates a high temperature detection signal as a first detection signal when the detection temperature exceeds a predetermined first threshold value. The first temperature detector 41 and the temperature of the transformer 24 are detected, and when the detected temperature exceeds a second threshold value higher than a predetermined first threshold value, a heating detection signal is generated as a second detection signal. A second temperature detector 43.

The elevator control unit 28 opens the normally open contact 22 on the basis of the high temperature detection signal from the first temperature detector 41, and inputs the changeover switch 28 from the a terminal to the b terminal side to the elevator control unit 28. The first controller 28a that supplies power from the storage battery controller 54 and the first controller 28a that operates the motor 10 by operating the first controller 28a no longer generates the first detection signal from the first temperature detector 41. Based on this, the normally open contact is closed, and the changeover switch 28 is turned on from the b terminal to the a terminal side to supply power to the elevator controller 28, and from the second temperature detector 43. If the car 16 is traveling due to the heating signal, an operation control unit 28c that stops the car 16 at the nearest floor is provided.

The operation of the elevator control apparatus configured as described above will be described with reference to FIGS. FIG. 2 is a flowchart showing the operation of the elevator control apparatus shown in FIG. 1, and FIGS. 3 and 4 are time charts showing the operation of the elevator control apparatus shown in FIG.
Now, the main normally open contact 5 is closed, the motor 10 is driven by the inverter 9 via the converter 7 to raise and lower the car 16, and the normally open contact 22 is closed, and the changeover switch is turned on to the a side. Thus, power is supplied to the elevator control unit 28 via the transformer 24 and the control power supply unit 26. The elevator control unit 28 drives the inverter 9 via the inverter driving unit 30.

As shown in FIG. 3, when the transformer 24 becomes hot as shown in FIG. 3, when a high temperature detection signal is generated from the first temperature detector 41 at time t1 (step S101), the first controller 28a of the elevator control unit 28 The normally open contact 22 is opened based on the high temperature detection signal from the one temperature detector 41 (step S103), and the changeover switch 28 is turned on from the a terminal to the b terminal side, and the storage battery control unit is connected to the elevator control unit 28. Power is supplied from 54 (step S105).

Next, if the elevator controller 28 determines whether or not a heating signal is generated from the second temperature detector 43 (step S107), the second controller 28b operates the first controller 28a. Then, by operating the motor 10, the normally open contact is closed based on the fact that the first detection signal is no longer generated from the first temperature detector 41, and the changeover switch 28 is moved from the b terminal to the a terminal side. The power is supplied to the elevator control unit 28.

On the other hand (when the elevator control unit 28 generates a heating signal from the second temperature detector 43 in step S107), the elevator control unit 28 runs the car 16 to the nearest floor and stops (step S109).

The elevator control apparatus of the above embodiment includes a converter 7 that converts an AC power source 3 into a DC power source, an inverter 9 that converts a DC power source into an AC of an arbitrary frequency and drives a motor 10 for driving a car, and an inverter 9 In an elevator control device comprising an elevator control unit 28 for controlling the power supply, a control power supply that receives power supply from the AC power supply 3 and supplies DC power to the elevator control unit 28 via the normally open contact 22 and the transformer 24 The temperature of the first control power supply 23 having the section 26, the second control power supply 51 including the storage battery 52 that supplies power to the elevator control section 28 via the changeover switch 27, and the temperature of the transformer 24 are detected, and the detected temperature is set in advance. A first temperature detector 41 that generates a high temperature detection signal when a predetermined first threshold is exceeded, and a normally open contact 2 based on the high temperature detection signal While the open, in which the changeover switch 27 and a first controller 28a supplies power from the second control power source 51 was put into b side from a side to the elevator control unit 28.

Thus, when it is detected that the first control power supply 23 has become high temperature, the input of the first control power supply 23 is shut off by the normally open contact 22 and the second control power supply 51 supplies power to the elevator control unit 28. . Therefore, even when the first control power source 23 becomes high temperature, the second control power source 51 can continue to travel the car 16.

The elevator control apparatus according to the above embodiment detects the temperature of the transformer 24, and generates the overheat detection signal when the detected temperature exceeds a second threshold value higher than a predetermined first threshold value. 43 and an operation control unit 28c for stopping the car 16 at the nearest floor based on the overheat detection signal. Thereby, it is possible to prevent passengers from being trapped in the car 16 and to prevent abnormal heat generation of the first control power source 23.

The elevator control apparatus according to the above embodiment closes the normally open contact 22 based on the fact that the high temperature detection signal is no longer generated by operating the motor 10 by operating the first controller 28a, and switching. It is preferable to include a second controller 28b that switches the switch 27 from the b side to the a side.
Thus, when a high temperature detection signal is generated, the second control power supply 51 supplies power to the elevator control unit 28. When the high temperature detection signal is not generated, the first control power supply 24 supplies power to the elevator control unit 28. To do. Therefore, even if the temperature of the first control power supply 23 rises temporarily, the operation can be continued smoothly.

  The present invention can be applied to an elevator control device.

1 is an overall view of an elevator control device according to an embodiment of the present invention. It is a flowchart which shows operation | movement of the control apparatus of the elevator by FIG. It is a time chart which shows operation | movement of the control apparatus of the elevator by FIG. It is a time chart which shows operation | movement of the control apparatus of the elevator by FIG.

Explanation of symbols

  3 AC power supply, 7 converter, 9 inverter, 10 motor, 16 car, 22 normally open contact, 24 transformer, 28 elevator control unit, 28a first controller, 27 changeover switch, 28b second controller, 28c operation control unit, 41 1st temperature detector, 43 2nd temperature detector, 52 storage battery.

Claims (3)

In an elevator control device for controlling a car driving motor by an elevator control unit based on an AC power supply,
A first control power supply for receiving a power supply from the AC power supply and supplying a DC power supply to the elevator controller via a first opening / closing means;
A second control power source comprising a storage battery for supplying power to the elevator control unit via a second opening / closing means;
First temperature detecting means for detecting the temperature of the instrument constituting the first control power source and generating a first detection signal when the detected temperature exceeds a predetermined first threshold;
First control means for opening the first opening / closing means based on the first detection signal, closing the second opening / closing means and supplying power from the second control power source to the elevator control unit;
An elevator control device comprising: A second temperature detecting means for detecting a temperature of the instrument and generating a second detection signal when the detected temperature exceeds a second threshold value higher than a predetermined first threshold value;
Operation control means for stopping the car at the nearest floor based on the second detection signal;
The elevator control device according to claim 1, further comprising: The first opening / closing means is closed and the second opening / closing means is opened based on the fact that the first detection signal is no longer generated by operating the first control means and operating the motor. A second control means;
The elevator control device according to claim 1 or 2, further comprising:

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