JPH06236719A - Electromagnetic switch - Google Patents

Abstract

PURPOSE:To reduce the number of connecting terminals and enhance reliability of operation by carrying out connection between a power source line and a driving circuit of an electromagnet device and connection between the driving circuit of the electromagnet device and a switch by inside wiring, for integration. CONSTITUTION:An electromagnet device 1 is driven by a driving circuit comprising a control power source 2, a voltage detector 3, a closing pulse portion 4, a holding pulse portion 5, and an output portion 6. The circuit 7 is connected to a contact 10a of a relay 10 for turning on or off an input current with respect to an input circuit of the detector 3. The circuit 7 and a switch 14 are integrally connected to each other by inside wiring. Otherwise, connection between a power source line 12 and the circuit 7 and connection between the circuit 7 and the switch 14 are carried out by inside wiring, for integration. Consequently, the number of connecting terminals is decreased to, e.g. 4 or 2, thus reducing the cost of the device and wiring. Furthermore, the device can be miniaturized. A non-contact relay can be adopted to the relay 10 used in the circuit 7, thus enhancing reliability of operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic switch using a drive circuit for an electromagnet controlled by a programmable controller (hereinafter abbreviated as PC) or the like.

[0002]

2. Description of the Related Art FIG. 13 is a circuit diagram of a drive circuit for an electromagnet device controlled by a PC or the like described in Japanese Utility Model Laid-Open No. 2-82005. In FIG. 13, the electromagnet device 1 is driven by a drive circuit 7 including a control power supply device 2, a voltage detection unit 3, a closing pulse unit 4, a holding pulse unit 5, and an output unit 6. The drive circuit 7 is connected to the control power supply 9 and the contact 10a of the relay 10 controlled by the PC 8 is connected in series to the input circuit of the voltage detection unit 3, and operates by turning on / off the contact 10a. The control power supply device 2 is provided with a three-terminal regulator or the like for applying an appropriate control voltage to the drive circuit 7, and the voltage detection unit 3 detects whether the power supply voltage is normal or not, and applies it to the next application pulse unit 4. Give orders. The closing pulse unit 4 generates a closing pulse for a short time, and operates the electromagnet device 1 via the output unit 6. Since the holding pulse unit 5 holds the electromagnet apparatus 1 after the electromagnet apparatus 1 operates, the holding pulse unit 5 continuously outputs a holding pulse lower than the closing pulse. Such a drive circuit 7
For example, as shown in FIG. 14, when the contact 10a (R in FIG. 14) is turned on, a large current I is caused to flow during the closing pulse time Ti to operate the electromagnet device 1, and subsequently a holding pulse of a small current is generated. The operation of the electromagnet device 1 is maintained. Of course, when the contact 10a is turned off, the holding pulse disappears, and the electromagnet device 1
Is released. In FIG. 13, D is a diode.

FIG. 15 is a circuit diagram of an electromagnetic switch 15 using the drive circuit of this electromagnet device. In FIG. 15, 1
Reference numeral 4 denotes an opening / closing part, which is a main contact 1 for opening / closing the power supply line 12.
3 and an electromagnet device 1 for driving the main contact 13. The electromagnet device 1 is driven by a drive circuit 7 of the electromagnet device similar to the drive circuit of the electromagnet device shown in FIG. 13 to drive the electromagnet device. The power supply of the circuit 7 is supplied from, for example, the R and S phases of the power supply line 12 (corresponding to the AC power supply 11 of FIG. 13), and is driven by turning on / off the contact 10a of the relay 10 controlled by the PC 8.

FIG. 16 is a circuit diagram showing a different example of a drive circuit of an electromagnet device controlled by a PC or the like. In FIG. 16, the electromagnet device 1 includes a coil of the electromagnet device and a power source 1.
It operates by turning on / off a drive circuit composed of a relay 10 whose contacts 10a and 10b are connected to and from the relay 1. In general, the output current of the PC is insufficient to operate the electromagnet device, and thus a sufficient drive current is supplied from the power supply 11 via the drive circuit including the relay. In this case, since the contact of the relay 10 is directly connected to the power source 11, the two-contact type is normally used by using the two contacts 10a and 10b. The drive circuit shown in FIG. 16 is shown in FIG.
The relay circuit 1 does not have the function of detecting whether the power supply voltage 11 is normal as in the drive circuit shown in FIG. 3 or the switching function of the coil current when the electromagnet device 1 is turned on and held.
Since it is composed of individual pieces, it has a low cost characteristic.

FIG. 17 is a circuit diagram of an electromagnetic switch 15 using the drive circuit of this electromagnet device. In FIG. 17, 1
Reference numeral 4 denotes an opening / closing part, which is a main contact 1 for opening / closing the power supply line 12.
3 and an electromagnet device 1 for driving the main contact 13. The electromagnet device 1 is driven by a drive circuit including a relay 10 similar to the drive circuit of the electromagnet device shown in FIG. The contacts 10a and 10b of the relay 10 are
For example, it is connected to the R and S phases of the power supply line 12 (corresponding to the AC power supply 11 in FIG. 16) and controlled by the PC 8.

[0006]

In the electromagnetic switch using the drive circuit of the electromagnet device controlled by the above-mentioned PC or the like,
There is a problem that the number of connection terminals is large as follows. That is, in FIG. 15, two connection terminals T ₁ and T ₂ connecting the contact 10 a of the relay 10 controlled by the PC 8 and the drive circuit 7 and the power supply line 12 and the drive circuit 7 are connected. Two connecting terminals T ₃ and T ₄ , two connecting terminals T ₅ and T ₆ on the drive circuit 7 side for connecting the drive circuit 7 and the opening / closing section 14, and two connecting terminals T ₅ and T ₆ on the opening / closing section 14 side. Connection terminal T ₇ ,
A total of eight connection terminals T ₈ is required (Note that the connection terminal T ₈ by connecting directly to the power supply line 12 abolished the connection terminals T _6, the number of connection terminals can be reduced to seven However, it is not preferable because the number of connection lines to the power supply line increases. In addition, in FIG. 17, four connection terminals T ₇ , T ₈ , S ₁ , and S ₃ that connect between the switching unit 14 and the contacts 10a and 10b of the relay 10 that constitutes the drive circuit.
And contacts 10a and 10 of power line 12 and relay 10
2 connecting terminals S ₂ and S ₄ for connecting to b and a total of 6
Individual connection terminals are required. If the number of connection terminals is large as described above, the cost of the device increases correspondingly, and further wiring is required for that.

Further, since the drive circuit of the electromagnet device described above uses a relay having a contact, there is a problem that the operation reliability is low. An object of the present invention is to reduce the number of connection terminals in an electromagnetic switch using a drive circuit of an electromagnet device controlled by a PC or the like. Furthermore, it is to improve the reliability of the operation.

[0008]

In order to achieve the above-mentioned object, an electromagnetic switch according to the present invention comprises an opening / closing section including a main contact for opening / closing a power supply line and an electromagnet device for driving the main contact, A voltage detection unit that monitors the stable operating voltage of the electromagnet device, a closing pulse unit that receives a command from the voltage detection unit to generate a closing pulse for attracting the electromagnet, and a closing pulse generated by the closing pulse unit And a holding pulse unit for issuing a holding pulse for holding the suction operation when the apparatus is attracted, and driving an electromagnet device in which a contact of a relay for turning on / off an input current is connected to an input circuit of the voltage detection unit. In the electromagnetic switch including a circuit, the drive circuit of the electromagnet device and the switch are connected by internal wiring to be integrated. Alternatively, the connection between the power supply line and the drive circuit of the electromagnet device and the connection between the drive circuit of the electromagnet device and the opening / closing section are performed by internal wiring to be integrated.

Further, a main contact for opening and closing the power supply line, an opening and closing unit including an electromagnet device for driving the main contact, and a voltage detecting unit for monitoring a stable operation voltage of the electromagnet device,
A closing pulse section that generates a closing pulse for receiving the command from the voltage detecting section to cause the electromagnet to perform a suction operation, and a holding pulse that holds the suction operation when the electromagnet device is attracted by the closing pulse generated by the closing pulse section. An electromagnetic switch including a drive circuit of an electromagnet device including a holding pulse unit that emits a pulse, and a relay having a contact that is connected to an input circuit of the voltage detection unit and that turns on / off an input current, in the electromagnetic switch. Connection between the drive circuit and the opening / closing section is performed by internal wiring to be integrated. Alternatively, the connection between the power supply line and the drive circuit of the electromagnet device and the connection between the drive circuit of the electromagnet device and the opening / closing unit are performed by internal wiring to be integrated. Further, a main contact for opening and closing the power supply line, an opening and closing unit consisting of an electromagnet device for driving the main contact, and a relay whose contact is connected between the power supply line and the electromagnet device In an electromagnetic switch including a drive circuit, the drive circuit of the electromagnet device and the switch are connected by internal wiring to be integrated. Alternatively, the connection between the power supply line and the drive circuit of the electromagnet device and the connection between the drive circuit of the electromagnet device and the opening / closing section are performed by internal wiring to be integrated.

Further, each of the above-mentioned relays is a non-contact relay.

[0011]

In the electromagnetic switch of the present invention as defined in claims 1 to 6, the drive circuit of the electromagnet device and the switch are connected by internal wiring to be integrated. Alternatively, since the connection between the power supply line and the drive circuit of the electromagnet device and the connection between the drive circuit of the electromagnet device and the opening / closing section are integrated by internal wiring, the number of connection terminals is the PC in the claim 1. 3. A relay controlled by a PC or the like in a total of four connection terminals, two connection terminals for connecting to contacts of a relay controlled by the above and two connection terminals for connecting to a power line. 2 connecting terminals for connecting to the contacts of the relay, and in claim 3 a total of 4 connecting terminals for connecting the relay to the PC side and 2 connecting terminals for connecting to the power supply line. For connecting to the connection terminal, in claim 4, two connecting terminals for connecting the relay to the PC side, and in claim 5, connecting to the two connecting terminals for connecting the relay to the PC side and the power line. Of two connection terminals A total of four
According to the sixth aspect, the number of connection terminals is reduced, and the number of connection terminals is reduced. Further, as described in claim 7, since each of the above-mentioned relays is composed of a non-contact relay, reliability of operation is improved.

[0012]

1 is a circuit diagram showing an embodiment of an electromagnetic switch of the present invention. The electromagnetic switch of the present invention shown in FIG.
In the conventional electromagnetic switch shown in FIG. 1, the connection between the drive circuit 7 of the electromagnet device and the opening / closing part 14 is performed by internal wiring and integrated, whereby the connection terminals T ₅ , T ₆ , T
₇ and T ₈ are abolished, and the number of connecting terminals is two connecting terminals T ₁ and T ₂ for connecting to terminals S ₁ and S ₂ of the contact 10a of the relay 10 controlled by the PC and the power line 12. There are a total of four connection terminals T ₃ and T _{4 which} are loose.

FIG. 2 is a circuit diagram showing a different embodiment of the electromagnetic switch of the present invention. FIG. 2 shows the relay 10 in FIG.
Is composed of a non-contact relay 10A composed of, for example, a photocoupler, which improves the operation reliability of the entire system. FIG. 3 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. In FIG. 3, the power supply line 12 and the drive circuit 7 of the electromagnet device are further connected by internal wiring in FIG. 1 and integrated, whereby the connection terminals T ₃ and T ₄ are eliminated and the number of connection terminals is Contact 10a of relay 10 controlled by PC8
Connection terminals T ₁ and T ₂ for connecting to terminals S ₁ and S ₂ of
It will be two.

FIG. 4 is a circuit diagram showing a further different embodiment of the electromagnetic switch of the present invention. 4 is a circuit diagram of FIG. 3 in which the relay 10 is a contactless relay 10 including a photocoupler, for example.
The system as a whole is improved in operation reliability. FIG. 5 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. FIG. 5 shows the relay 10 built in the electromagnetic switch 15 in FIG.
In this case, the connection between the terminals S ₁ and S ₂ of the contact 10a of the relay 10 and the input circuit of the voltage detecting section is made by internal wiring. As a result, there are a total of four connecting terminals T ₁ and T ₂ for connecting the electromagnet device of the relay 10 to the PC 8 and two connecting terminals T ₃ and T ₄ for connecting to the power supply line 12.

FIG. 6 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. FIG. 6 shows the relay 1 in FIG.
0 is a contactless relay 10A composed of, for example, a photocoupler.
, Which improves the reliability of operation. FIG. 7 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. In FIG. 7, the connection between the power supply line 12 and the drive circuit 7 of the electromagnet device is further integrated by the internal wiring in FIG. 5, whereby the connection terminals T ₃ and T ₄ are abolished. Number of PC
Terminal S of contact 10a of relay 10 controlled by 8
_{There are two} for connecting to ₁ and S ₂ .

FIG. 8 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. FIG. 8 shows the relay 1 in FIG.
0 is a contactless relay 10A composed of, for example, a photocoupler.
, Which improves the reliability of operation. FIG. 9 is a circuit diagram showing a further different embodiment of the electromagnetic switch of the present invention. The electromagnetic switch of the present invention shown in FIG. 9 is the same as the conventional electromagnetic switch shown in FIG. 17, in which the connection between the relay 10 and the opening / closing part 14 constituting the drive circuit of the electromagnet device is made by internal wiring. Thus, a total of four connecting terminals T ₁ and T ₂ for connecting the relay 10 to the PC 8 and two connecting terminals T ₃ and T ₄ for connecting the electromagnet device 1 to the power line 12 are provided. become.

FIG. 10 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. FIG. 10 shows the relay 10 in FIG. 9 as a contactless relay 1 including, for example, a photocoupler.
0A, which improves the reliability of operation. FIG. 11 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. FIG. 11 corresponds to FIG.
Further, the power supply line 12 and the drive circuit of the electromagnet device including the relay 10 are connected by internal wiring and integrated, whereby the connection terminals T ₃ and T ₄ are eliminated and the number of connection terminals is reduced to the relay 10. Becomes _two connection terminals T ₁ and T ₂ for connecting the PC to the PC 8.

FIG. 12 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention. In FIG. 12, the relay 10 in FIG. 11 is made up of a contactless relay 10A made of, for example, a photocoupler, which improves the reliability of operation. In this way, the number of connection terminals is greatly reduced to four or two. Furthermore, since the relay used in this drive circuit is a non-contact relay made of, for example, a photo coupler, the reliability of operation is improved.

[0019]

INDUSTRIAL APPLICABILITY The present invention is an electromagnetic switch using a drive circuit of an electromagnet device controlled by a PC or the like, and the number of connecting terminals is greatly reduced to, for example, four or two. The cost for is reduced. Also,
As a result, the electromagnetic switch is made smaller and its practical effect is great. Furthermore, since the relay used in this drive circuit is a contactless relay, the reliability of operation is improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of an electromagnetic switch of the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the electromagnetic switch of the present invention.

FIG. 3 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 4 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 5 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 6 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 7 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 8 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 9 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 10 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 11 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 12 is a circuit diagram showing still another embodiment of the electromagnetic switch of the present invention.

FIG. 13 is a circuit diagram showing a conventional example of a drive circuit of an electromagnet device controlled by a PC or the like.

14 is a waveform diagram showing opening and closing of contacts of a relay controlled by a PC or the like of a drive circuit of the conventional electromagnet device shown in FIG. 13 and current thereof.

FIG. 15 is a circuit diagram of an electromagnetic switch using the drive circuit of the electromagnet device shown in FIG.

FIG. 16 is a circuit diagram showing a conventional example in which a drive circuit of an electromagnet device controlled by a PC or the like is different.

FIG. 17 is a circuit diagram of an electromagnetic switch using the drive circuit of the electromagnet device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnet device 3 Voltage detection unit 4 Applying pulse unit 5 Holding pulse unit 7 Electromagnetic device drive circuit 10 Relay 10a contact (relay 10) 10b contact (relay 10) 10A non-contact relay 12 Power line 13 Main contact

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michiya Aoyagi 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd.

Claims (7)

[Claims] 1. An opening / closing unit including a main contact for opening and closing a power supply line and an electromagnet device for driving the main contact, a voltage detecting unit for monitoring a stable operating voltage of the electromagnet device, and a command from the voltage detecting unit. And a holding pulse unit for generating a holding pulse for holding the suction operation when the electromagnet device is attracted by the closing pulse generated by the closing pulse unit. An electromagnetic switch comprising a drive circuit of an electromagnet device in which a contact of a relay for turning on / off an input current is connected to an input circuit of the voltage detection unit, the drive circuit of the electromagnet device and the opening / closing unit. An electromagnetic switch characterized in that the connection between the two is integrated by internal wiring. 2. A main contact for opening / closing a power supply line, an opening / closing section including an electromagnet device for driving the main contact, a voltage detecting section for monitoring a stable operation voltage of the electromagnet apparatus, and a command from the voltage detecting section. And a holding pulse unit for generating a holding pulse for holding the suction operation when the electromagnet device is attracted by the closing pulse generated by the closing pulse unit. And an electromagnetic switch comprising a drive circuit of an electromagnet device in which a contact of a relay for turning on / off an input current is connected to an input circuit of the voltage detection unit, in the power supply line and the drive circuit of the electromagnet device. An electromagnetic switch characterized in that the connection between them and the connection between the drive circuit of the electromagnet device and the opening / closing part are made by internal wiring. 3. A main contact that opens and closes a power supply line, an opening and closing unit that includes an electromagnet device that drives the main contact, a voltage detection unit that monitors a stable operating voltage of the electromagnet device, and a command from the voltage detection unit. And a holding pulse unit for generating a holding pulse for holding the suction operation when the electromagnet device is attracted by the closing pulse generated by the closing pulse unit. An electromagnetic switch including a drive circuit for an electromagnet device, comprising: a relay having a contact that is connected to an input circuit of the voltage detection unit and turns on / off an input current. An electromagnetic switch characterized in that it is integrated with the connection with the internal wiring. 4. A main contact for opening and closing a power supply line, and this main contact
An opening / closing part including an electromagnet device that drives a point, and the electromagnetic
The voltage detector that monitors the stable operating voltage of the stone device
To receive a command from the pressure detection unit and cause the electromagnet to perform a suction operation
Of the closing pulse that generates the closing pulse of
The electromagnet device is attracted by the closing pulse generated by the
Hold pulse that holds the suction action when
A drive circuit for an electromagnet device consisting of a holding pulse section and
Connected to the input circuit of the voltage detector to turn on / off the input current.
Electromagnetic switch with built-in relay with contact
Between the power line and the drive circuit of the electromagnet device.
Connection and connection between the drive circuit of the electromagnet device and the opening / closing section
The feature is that the connection between them is done by internal wiring and integrated.
And electromagnetic switch. 5. An electromagnet device comprising a main contact for opening and closing a power supply line and an electromagnet device for driving the main contact, and a relay whose contact is connected between the power supply line and the electromagnet device. In the electromagnetic switch having the drive circuit according to claim 1, the connection between the drive circuit of the electromagnet device and the switch is integrated by internal wiring. 6. An electromagnet device comprising a main contact for opening and closing a power supply line and an electromagnet device for driving the main contact, and a relay whose contact is connected between the power supply line and the electromagnet device. In the electromagnetic switch provided with the drive circuit, the connection between the power supply line and the drive circuit of the electromagnet device and the connection between the drive circuit of the electromagnet device and the switch are integrated by internal wiring. An electromagnetic switch characterized by. 7. The electromagnetic switch according to claim 1, wherein the relay is a contactless relay.