JPH0449891A - Electric switchgear control device - 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 Field of Industrial Application This invention relates to a control device for electric opening/closing equipment such as shutters, blinds, and skylights.

BACKGROUND OF THE INVENTION The configuration of a conventional electric switchgear control device will be explained with reference to FIG. Electric opening/closing equipment is shutter motor 2.
It is composed of a control unit 3 and an operation unit 4 operated by a person. By operating the operating unit 4, power is supplied from the power source 5 to the motor 2. The operation unit 4 also has a display means to display the status of the shutter 1.

The control unit 3 and the operation unit 4 constitute an electric switching equipment control device. Of course, the control unit and the operation unit may be integrated.

FIG. 4 is a block diagram showing another conventional example.

6 is an electric switching device, which includes an induction motor 7, a capacitor 8, an open limit switch 9, a close limit switch 10, and a fully closed switch 11. The limit switches 9 and 10 have contacts that open when the switching device is fully closed or fully opened to cut off the current flowing to the motor. The contact of the fully closed switch 11 closes when the electric switching device is fully closed. In addition, 12 is a thermal protector which is a safety device. When the motor 7 becomes overheated due to abnormal use, the contacts are open until the temperature of the motor 7 falls, and the contacts are closed again when the temperature returns to normal. . 13 is an electric opening/closing equipment control device, and control unit 1
4 and an operating unit 15. control unit 1
4, the control means 16 receives the operation information of the "open", "stop", "close" buttons 17, 18, and 19 of the operation unit 15 of the user, and controls the opening/closing direction switching relay 20 and the drive stop relay 21. make it work. In addition, the fully closed switch 1
1 to display the status of the electric opening/closing device on the display means 22. 23 is a power source for operating the electric switching equipment.

Problems to be Solved by the Invention In the conventional configuration as described above, it was only possible to know whether the electric switching device was fully closed or not. In other words, it was not possible to distinguish and display the operating status of the thermal protector during full open and open operations, half-open stops, and the operating status of the thermal protector. To solve this problem, a full-open switch may be added to the electric switchgear, but in that case the number of connection wires would further increase and the connections would be complicated.

The present invention aims to solve the problems that conventional configurations had, such as abnormalities, and to provide a control device for electric switching equipment that detects fully open and fully open states with a simple connection configuration. This is the primary purpose. A second object of the present invention is to provide a control device for an electric opening/closing device that can distinguish and display whether the thermal protector is in operation as a result of abnormal use, and whether it is fully closed, fully open, or partially stopped.

Means for Solving the Problems The first means of the present invention to achieve the first object is to provide a current driving means for conducting and interrupting the current flowing to the motor of an electric switching device, and a current driving means for detecting the current flowing to the motor. The motor comprises a current detection means and a display means for displaying the state of the electric opening/closing device, and the current detection means detects that the current flowing to the motor is cut off, recognizes it as fully closed or fully open, and displays it on the display means. This is an electrically operated switching equipment control device. Further, a second means of the present invention for achieving the second object is an electric switchgear control device that detects the voltage of an electric wire connected to a motor in addition to the configuration of the first means. .

Function The first means of the present invention is capable of correctly displaying fully open and fully closed by controlling the opening/closing direction by the current driving means and by detecting the motor current by the current detecting means. Further, according to the second means of the present invention, the number of connected electric wires can be reduced, and the operating states of fully closed, fully opened, stopped midway, and the thermal protector can be detected and displayed.

Embodiment FIG. 1 shows an embodiment of a control device for electric switching equipment according to the present invention. In the figure, parts having the same functions as in FIG. 4 are given the same numbers. Reference numeral 24 denotes a current detecting means composed of, for example, a resistor or a current transformer, which detects the current flowing through the motor 7 and inputs this information to the control means 16. The relay 20 is a direction switching relay for switching the direction of the current flowing through the motor 7, and is a relay 2]
is a drive stop relay that stops driving the circuit. These relays 20 and 21 constitute a current driving means that conducts and interrupts the current flowing to the motor 7.

With the above configuration, the user attempts to open the electric opening/closing device 6 by operating the open button 17 of the control device 15, for example. This information is input to the control means 16 and relay 20
- 21 is driven, and the motor 7 is energized in the opening direction.

Next, the current detection means 24 detects the current flowing through the motor 7 and inputs this information to the control means 16.

The control means 16 causes the display means 22 to display "opening operation in progress" while the current detection means 24 is detecting the current flowing through the motor 7. Next, when the motor becomes fully open and the open limit switch 9 opens, no motor current flows. When the current detection means 24 detects this and similarly inputs this information to the control means 16, the display means 22 can display "fully open". The same applies to the closing operation.
When the close limit switch 10 operates and the current is cut off, it is "fully closed"
Display. As described above, according to this embodiment, fully open and fully open can be correctly displayed by detecting the motor current.

FIG. 2 shows a second embodiment of the control device for electric switching equipment of the present invention. 25 and 26 are closed room line voltage detection means and closed type line voltage detection means, respectively, which detect the voltage of the electric wire connected to the motor.

The operation of this embodiment will be explained below. In the first embodiment, the limit switch 9 or 10 is activated while the motor 7 is in operation.
Even if the thermal protector 12 is activated instead of the thermal protector 12 and the current is cut off, this cannot be distinguished. Therefore, in this embodiment, a closed room line voltage detection means 25 and a closed line voltage detection means 26 are installed. In other words, when the motor current is cut off, the drive stop relay 21 is opened, and in this state, if no voltage appears in either the closed room line voltage detection means 25 or the closed type line voltage detection means 26, the current is stopped by the operation of the thermal protector. You can tell it's broken. Further, even when the electric switching device 6 is restored from a power outage or when the electric switching device 6 is operated manually, the state of the electric switching device 6 can be known as follows. If the closed line voltage detection means 25 detects that voltage is applied, and at the same time the closed line voltage detection means 26 does not detect voltage, the close limit switch is open and the state is "fully closed". It can be determined that In the opposite case, it is in the "fully open" state, and if both the closed room line voltage detection means 25 and the closed type line voltage detection means 26 detect voltage, both limit switches 9 and 10 are closed. It can be determined that the system is stopped midway. Further, closed room line voltage detection means 25
If both the and closed line voltage detection means 26 do not detect voltage, it can be determined that the current has been cut off as a result of the thermal protector being activated.

As described above, according to this embodiment, it is possible to correctly distinguish between the drive stop state due to the operation of the thermal protector and the normal drive stop state due to the operation of the limit switch, and also to correctly open and close the electric switching equipment manually during a power outage. can be displayed.

Effects of the Invention As described above, according to the first means of the present invention, there is provided a current driving means for conducting and interrupting the current flowing to the motor of an electric switching device, a current detecting means for detecting the current flowing to the motor, An electric switching equipment control device comprising a display means for displaying the state of the switching equipment, and detecting that the current flowing to the motor is cut off by the current detection means, recognizes it as fully closed or fully open, and displays it on the display means. As a result, it is possible to provide a control device for electric switching equipment that detects fully open and fully open states with a simple connection configuration. Further, according to the second means of the present invention, in addition to the configuration of the first means, it can be used as a control device for electric switching equipment that detects the voltage of the electric wire connected to the motor with a simple connection configuration. - A control device for electric opening/closing equipment can be obtained that can distinguish between a mid-stop and an operating state of a thermal protector.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an electric switchgear control device showing one embodiment of the present invention, Fig. 2 is a block diagram of an electric switchgear control device showing a second embodiment of the invention, and Fig. 3 is a block diagram of an electric switchgear control device showing a second embodiment of the present invention. FIG. 4 is a block diagram of a conventional control device for electric switching equipment. 1... Electric opening/closing device, 9... Open limit switch,
10... Close limit switch, 12... Thermal protector, 20... Open/close direction switching relay, 21
... Drive stop relay, 24 ... Current detection means, 25
. . . Closed line voltage detection means, 26 . . . Closed line voltage detection means. Name of agent: Patent attorney Shigetaka Awano (1 person tall)

Claims (2)

[Claims] (1) Consisting of a current drive means for conducting and interrupting the current flowing to the motor of the electric switching device, a current detection means for detecting the current flowing to the motor, and a display means for displaying the status of the electric switching device, the current detection means An electric switching equipment control device that detects that the current flowing to the motor is cut off by means of means, recognizes that the motor is fully closed or fully open, and displays the recognition on the display means. (2) The electric switching equipment control device according to claim 1, which detects the voltage of an electric wire connected to the motor.