JPH01291643A - Remote controller - Google Patents

Abstract

PURPOSE:To prevent erroneous function by connecting a third diode between one of switching terminals of a switch and one of the ends of an exciting coil with opposite polarity from that of a first diode. CONSTITUTION:Current produced through counter electromotive force of the exciting coil L1 in a remote control relay RY1 having longer operating time after polarity inversion of the voltage of an AC power source VAC scarcely passes through a remote control relay RY2 having shorter operating time, and the majority thereof passes through any one of third or fourth diodes D13, D14. Consequently, counter electromotive force is not produced in the exciting coil L2 of the remote control relay RY2 when the switch S1 for the remote control relay RY1 functions, and erroneous conduction of reverse-blocking switching elements SCR1, SCR2 in a remote control switch RS can be prevented.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention provides a method for connecting a plurality of remote control relays (including remote control circuit breakers) in parallel,
A configuration in which parallel circuits of multiple remote control relays are connected to an AC power source via a leather remote control switch. By switching the remote control switch, each output contact of multiple remote control relays can be remotely controlled in common. This invention relates to a remote control type control device that controls opening/closing or switching.

[Traditional techniques]

As shown in FIG. 3, a conventional remote control type control device includes, for example, two remote control relays R.
Y,,RY,are connected in parallel, and two remote control relays,RY,are connected in parallel.

RY is connected to an AC power supply VAC via a remote control switch R3.

In this case, remote control relay RY.

is an excitation coil L1, a latching type changeover switch S, and first and second diodes D I l +D
I2.

The changeover switch S1 connects the common terminal C1 to one end of the excitation coil L1, and connects the excitation coil to one direction i.
The movable contact is driven to switch from one switching terminal a1 to the other switching terminal b1 by the electric current, and the excitation coil
1 in the other direction, the movable contact is driven to switch from the other switching terminal b1 to one switching terminal a.

The first diode D has one end (cathode side) connected to one switching terminal a of the changeover switch S1, and passes current in one direction to the exciting coil L1.

The second diode D1□ has one end (anode side) connected to the other switching terminal of the changeover switch S, and the other end (cathode side) connected to the other end (anode side) of the first diode D11. is connected to pass current in the other direction to the excitation coil L1.

Further, 1. The remote control relay RY4 has the same configuration as the remote control relay RY3, and includes an excitation coil 2, a changeover switch s2, and first and second diodes D! It is composed of i+Dz□.

On the other hand, remote control switch R3 connects common terminal c3 of switch S to remote control relay RY.
3. Connect to RY4 and switch S.

The normally open terminal a of the switch S is connected to one end of a parallel circuit of the first and second reverse blocking switching elements SCR+ and SCRz each consisting of a thyristor, and the normally closed terminal A of the switch S is
is connected to one end of the gate circuit GC.

Further, the first and second reverse blocking switching elements SCR
, , SCR, and the other end of the gate circuit GC are commonly connected to an AC power source VAc.

The first reverse blocking switching element SCR+ is
A current is passed in the same direction as the ill charge direction of the first diode DIl. Further, a second reverse blocking switching element SCR,
is i in the same direction as the current direction of the second diode DI□
Pass the IT style. In addition, the gate circuit GC discharges the accumulated charge of the built-in capacitor, so that the first and second
A gate current is supplied to the reverse blocking switching elements SCR, 5CR2 of the first and second reverse blocking switching elements 5CRI.

The SCR is made selectively conductive depending on the charging polarity of the built-in capacitor.

Next, the operation of this remote control type control device will be explained.

Assume that in a state where power is supplied from AC electricity gVAc, the changeover switch S is switched to the switching terminal a side, and the switch S is switched to the normally closed terminal b3 side. In this state, power is supplied to the gate circuit GC through the path of AC power supply V Ac-1 first diode DIl - changeover switch SI = excitation coil LI → switch S, → gate circuit GC → AC power supply vAc, and the gate circuit GC Charge is accumulated in a built-in capacitor (not shown) such that the switch S side has positive polarity.

Thereafter, when the switch S3 is switched to the normally open terminal a for a short time, a gate current flows from the gate circuit GC to the first reverse blocking switching element SCR.

conducts. As a result, AC power supply VAe - first diode D I I - changeover switch S1 - excitation coil L
, → switch, CH S, - first reverse blocking switching element S
CR,→The excitation coil is passed through the AC power supply vAc path, and current flows in one direction. As a result, the selector switch S is switched from the switching terminal a1 side to the b1 side, and the output contact (not shown) is also switched in conjunction with this.

When the changeover switch SI is switched from the changeover terminal a1 side to the changeover terminal b1 side, the above path is opened and the exciting coil is turned on.
The power supply to will be stopped.

After that, when switch S is returned to the normally closed terminal b2 side, AC power supply vAcAc - gate circuit - C - switch - excitation coil upper 1 → selector switch S+ - second diode [
)+1=Power is supplied to the gate circuit GC through the path of the AC ii source VAC, and charges are accumulated in the built-in capacitor of the gate circuit GC so that the switch S side has negative polarity, contrary to the above.

After that, when the switch S is switched to the normally open terminal a side for a short time, a gate current flows from the gate circuit GC to the second reverse blocking switching element 5cRz, and the second reverse blocking switching element 5CR1 becomes conductive. . As a result, the AC power supply VAC - the second reverse blocking switching element SC
R, → switch S.

Current flows in the other direction through the excitation coil L1 through the path of - changeover switch S1 - second diode DIZ - AC power supply (1). As a result, the selector switch S is switched from the switching terminal A1 side to the switching terminal A1 side, and the output contact (not shown) is also switched in conjunction with this.

When the selector switch S is switched from the switching terminal S side to the switching terminal A side, the above path is opened and the excitation coil L1
The power supply to will be stopped.

Thereafter, the above operation is repeated every time the switch S3 is switched to the normally open terminal a side.

In addition, at this time, remote control relay RY, t
+ Operates in the same way as remote control relay RY3.

[Problem to be solved by the invention]

In the conventional remote control type control device shown in FIG. 3, remote control relay RY3. RY
It is normal for the operating times of 4 to vary. Remote control relay RY has such variations in operating time. When the RY4s are connected in parallel and commonly controlled by a single remote control switch R3, a surge voltage is generated when the changeover switch S, for example, is switched later. Then, due to this surge voltage, the first
and a second reverse blocking switching element SCR+.

There was a risk that SCRz would be erroneously conductive and the changeover switches S+ and St would be switched, causing chattering while the switch S was being switched to the normally open terminal a.

This point will be explained in detail below based on FIG. 4.

Before time t, the changeover switch S1 was switched to the changeover terminal a1 side as shown in FIG. 4 (d+), and the changeover switch S2 was switched to the changeover terminal a2 side as shown in FIG. 4 (fl).
The switch S3 is switched to the side shown in Fig. 4 (
As shown in bl, the normally closed terminal has been switched to the side.

At this time, remote control relay RY.

The current ■1 flowing through is O as shown in FIG. 4(C) (the direction of the arrow in FIG. 3 is taken as the positive direction in FIG. 4(C)). In addition, remote control relay RY
The t flow I2 flowing in the 4th direction is 0 as shown in FIG. 4 (tel) (the direction of the arrow in FIG. 3 is taken as the positive direction in FIG. 4 (tel)). Therefore, the current 11 flowing through the remote control switch R3 is also 0 as shown in FIG. 4 (gl) (the direction of the arrow in FIG. 3 is taken as the positive direction in FIG. 4 FK+).

In addition, at this time, the voltage v3 across the remote control switch R3 is as shown in FIG.
IT electronic avAC half-wave rectification iIi1M! The charging voltage of the capacitor that is charged by the voltage appears (remote control relay RY 3 in Figure 3. The state in which the RY 4 side is at a high potential is shown in Figure 4 (the positive direction in hl).

Note that +a+ in FIG. 4 shows the voltage of the AC power supply VAC (remote control relay RY3.RY in FIG. 3) in a state where the side is at a high potential (positive direction in al).

At time t1, switch S is switched to the normally open terminal a as shown in Figure 4 (4), and since the voltage of AC power supply VAc is positive at this time, first reverse blocking switching element SCR+ A gate current is supplied to the first reverse blocking switching element SCR+, and the voltage V across the remote control switch R3 becomes approximately 0 (>O) as shown in FIG. 4th+. As a result, AC power supply ■
1-first diode DIl-selector switch S1-exciting coil L,-first reverse blocking switching element SCR+
- Current ■1 flows in the positive direction in the path of the AC power supply vAC as shown in Figure 4 (tel), and the AC power supply HV AC
- First diode DZ+ = changeover switch sz → Excitation coil L2 → First reverse blocking switching element SCR, → AC current I2 flows in the positive direction as shown in FIG. Current ■ is Fig. 4fg
As shown in l, it is the sum of electric current 7R[l and current ■.

When the current I2 flows, the changeover switch S2 is switched from the switching terminal a2 side to the switching terminal A side (the third (shown by the broken line in the figure).As a result, the current ■2 becomes 0 as shown in Figure 4(e), and the current ■
As shown in Figure 4 (phantom), only the current ■1 becomes current. At this time, the current ■8 that was flowing through the excitation coil L is cut off, so the excitation coil L2 is inverted by setting the changeover switch S2 side to negative. An electromotive voltage is generated and this voltage is applied between the changeover switch St changeover terminal a and the common terminal 02, but this voltage does not affect the changeover operation, and at this time the changeover switches S,
, SZ will not be switched by mistake.

Also, when current I flows, from time t, operating time T+
At time t4, which is delayed by (>Tx), the changeover switch S1 is switched from the changeover terminal a1 side to the changeover terminal b1 side, as shown in FIG. 4(d). However, if the operation time T of the snow control relay RY is long, the AC/R power &
The voltage of V A c may be reversed from positive polarity to negative polarity as shown in FIG. 4 far. On the other hand, current!
1 has a lagging phase with respect to the voltage of the AC power supply ■AC, as shown in Figure 4 (C1), and continues to flow with positive polarity from time t onward.As a result, from time tz to time t, During this time, all of the current ■1 flows into the remote control switch R3 as a current 1□, but after time t3, a part of the current I flows into the remote control switch R3 as shown in FIG. The current flows in the negative direction as current ■2.That is, the excitation coil L, -excitation coil L, -selector switch S2→second diode [)z
A loop current flows in the path of z→first diode DII→changeover switch S1-excitation coil L.

Then, at time L4, when the selector switch s1 is switched from the switching terminal a to the switching terminal S side as shown in FIG. 4 fd+, the current I is cut and the current ■2 is cut. become.

As a result, the current 11 becomes 0 as shown in Figure 4 (C1), the current 2 also becomes 0 as shown in Figure 4 (el), and the current 2 becomes O as shown in Figure 4 (phantom). Become.

At this time, the current I flowing through the exciting coil L1.

is cut, so switch S1 is set to excitation coil L.
A back electromotive voltage with negative side is generated, and this voltage is applied between the changeover switch S, the changeover terminal a1 and the common terminal 01, but this voltage does not affect the switching operation, and thereby the changeover switches S+, St will not be switched erroneously.

However, at this time, current ■8 is cut at the same time, so
A back electromotive voltage is generated in the excitation coil L2 with the changeover switch s2 side being positive, and this voltage is applied as a surge voltage across the remote control switch R3 as shown in FIG. 4ff11. In this case, the surge voltage should not cause the second reverse blocking switching element SCR to conduct.

Therefore, if the value is large, the second reverse blocking switching element SCR, becomes conductive, and the current 1
+, lx flows in the negative direction as shown in Figure 4 (C1, tel. As a result, remote control relay RYi
, RYn cD changeover switches Sx and St are shown in Fig. 4 (d+
, (As shown in fl, a malfunction occurs in which the switching terminals S, , b□ side are switched to the switching terminal aI+ag side at time t5+t&, respectively.

In addition, in the worst case, this malfunction occurs when the switch S.

This occurs repeatedly during the period when the switch is switched to the normally open side, and this phenomenon appears as a so-called chuckling phenomenon.

An object of the present invention is to provide a remote control type control device that can prevent malfunctions due to variations in operating time of a plurality of remote control relays.

[Means to solve the problem]

In the remote control type control device of the present invention, a plurality of remote control relays are connected in parallel, and the plurality of parallel connected remote control relays are connected to an AC power source via a single remote control switch.

In this case, each of the plurality of remote control relays includes an excitation coil, a latching type changeover switch, and a first
．． Second. It is composed of a third and a fourth diode.

In the above changeover switch, a common terminal is connected to one end of the excitation coil, and when the excitation coil is energized in one direction, the movable contact is switched from one switching terminal to the other switching terminal, and the movable contact is driven to switch from one switching terminal to the other switching terminal. The movable contact is driven to switch from the other switching terminal to one switching terminal by energizing in the direction.

Further, one end of the first diode is connected to one of the switching terminals of the changeover switch to pass current in one direction to the exciting coil. The second diode 1 has one end connected to the other switching terminal of the changeover switch, and the other end connected to the other end of the first diode, thereby passing current in the other direction to the excitation coil.

Further, the third diode is connected between one switching terminal of the changeover switch and the other end of the excitation coil with a polarity opposite to that of the first diode. The fourth diode is connected between the other switching terminal of the changeover switch and the other end of the excitation coil with a polarity opposite to that of the second diode.

On the other hand, the '/mote control switch is composed of a parallel circuit of first and second reverse blocking switching elements. The first reverse blocking switching element is a first reverse blocking switching element.
Pass current in the same direction as the current flowing direction of the diode. Further, the second reverse blocking switching element passes current in the same direction as the current direction of the second diode.

[For production]

In the configuration of the present invention, in each of the plurality of remote control relays, the third diode is connected between one switching terminal of the switching switch and the other end of the excitation coil.
Since the polarity is opposite to that of the third diode, the current that continues to flow in one direction through the excitation coil even after the voltage of the AC power supply is reversed due to the back electromotive voltage of the excitation coil is connected to the third diode and It will flow through the selector switch.

In addition, since the fourth diode is connected between the other switching terminal of the changeover switch and the other end of the excitation coil with a polarity opposite to that of the second diode, the back electromotive force of the excitation coil causes the AC power source to Even after the voltage is reversed, the current that continues to flow in the other direction through the exciting coil will flow through the fourth diode and the changeover switch.

Therefore, in a situation where the operating times of multiple remote control relays vary and the polarity of the AC power source is reversed before the changeover switch of the remote control relay with the longer operating time performs the switching operation, the AC power voltage After the polarity is reversed, the current due to the back electromotive force of the excitation coil of the remote control relay with a longer operating time hardly passes through the remote control relay with a shorter operating time, and most of the current flows through the third and fourth diodes. It will flow through something.

As a result, when the changeover switch of the remote control relay with the longer operating time is switched, no back electromotive force is generated in the excitation coil of the remote control relay with the shorter operating time, and the reverse voltage of the remote control switch that should not be conductive is generated. I accidentally set the blocking switching element to 4i! 1
There will be no more letting go.

On the other hand, the back electromotive force generated in the excitation coil of the remote control relay with the longer operating time has the opposite polarity to the direction in which the reverse blocking switching element of the remote control switch, which should not be made conductive, is made conductive. Since they are in the opposite direction to the voltage and cancel each other out, there is no problem.

Therefore, it is possible to prevent malfunctions due to variations in the operating times of the plurality of remote control relays.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2. That is, this remote control type control device includes, as shown in FIG. 1, a remote control relay RY in FIG.

In place of RY, for example, two remote control relays RY I + RY t are used, and the other configurations are the same as in FIG. 3.

The remote control relay RY connects the third diode I)ts to one switching terminal a1 of the changeover switch S.
and the other end of the MII magnetic coil L, and is connected to the first diode D I 1 with opposite polarity.

In addition, the fourth diode DI4 is connected to the selector switch sI.
The second diode DI2 is connected between the other switching terminal b1 and the other end of the excitation coil L+ with a polarity opposite to that of the second diode DI2.

The remote control relay RY z has third and fourth diodes D ts and D za similar to those described above added to the remote control relay RY a.

This remote control type control device has two remote control relays RY, RYE, and
Third diode DIl[)zs selector switch S
+, one switching terminal a1 of Sz. a2 and excitation coil L+
, the first diode D 1 + between the other ends of Lz,
Since they are connected with opposite polarity to D t +, the AC type [
Even after the voltage of VAC is reversed, the excitation coil Ll,
The current that tends to flow in one direction through L2 will flow through the diodes D, , D, and changeover switches S+ and Sz of 7-g3.

Further, the fourth diode D14. Dzg is connected to the other switching terminal of the switch S, , S, b2 and the excitation coil L.
+, the second diode D1□, D2 between the other end of Lx
Since it is connected with opposite polarity to 2, m1 magnetic coil L
Even after the voltage of the AC power supply ■＾C is reversed due to the back electromotive voltage of + and Lz, the current that continues to flow in the other direction through the excitation coils L, , L is passed through the fourth diode DI 4+ D
24 and selector switch 31. S! It will flow through.

Therefore, two remote control relays RY,
, RY, and the polarity of the AC type ■1 voltage is reversed before the changeover switch SI of the remote control relay with the longer operation time, such as RY, performs the switching operation. After the polarity of the voltage of AC power supply ■1 is reversed, the current due to the back electromotive voltage of the excitation coil L of the remote control relay RY, which has a longer operating time, is transferred to the remote control relay R, which has a shorter operating time.
Y, and most of it passes through the third and fourth diodes D, 3. It will flow through either D.

As a result, when the changeover switch S1 of the remote control relay RY with the longer operating time is switched, the remote control relay RY with the shorter operating time! A back electromotive voltage is not generated in the excitation coil L2 of the remote control switch R5, and the reverse blocking switching elements S CR+ and S CRz of the remote control switch R5, which should not be made conductive, are not erroneously made conductive.

On the other hand, the back electromotive voltage generated in the excitation coil L of the remote control relay RYI, which has a longer operating time, has a polarity opposite to the direction in which the reverse blocking switching elements 5CR1 and 5CR2 of the remote control switch R3, which should not be made conductive, are made conductive. Moreover, it is an AC type B V A
This is in the opposite direction to the voltage of c, and they cancel each other out, so there is no problem.

Therefore, two remote control relays RY+,
Malfunctions due to variations in the operating time of RYz can be prevented.

Therefore, the chuckling phenomenon of the changeover switches S+ and Sz can be reliably prevented.

Note that other operations are similar to those of the conventional example.

FIG. 2 shows an example (the third and fourth diodes DIl
DI4. A time chart of each part of the DZ31 (with Dza added) is shown. In the same figure, (
a+~(hl is a time chart of the same part as FIG. 4 fat~(hl).

As is clear from this FIG. 2, from time t3 to time t4
Unlike the conventional example, two remote control relays RY1. Almost no loop current flows through RYf. Therefore, the current I2 remains open as shown in FIG. 2, and at time t, the selector switch S
is one switching terminal a.

No surge voltage is generated when the switch is switched from to the other switching terminal S, and no surge voltage appears in the voltage V across the remote control switch R3, as shown in FIG. 2(h). Therefore, the second reverse blocking switching element SCRz does not conduct, and the switching terminals S+, Sz of both remote control relays RY, RYE switch to the other switching terminals fdl and (fl) as shown in FIG. , ,b, and after time t4, the currents r+, Iz, and It each become 0.The voltage across the remote control switch R3, ■, is as shown in Figure 2 (hl). , second reverse blocking switching element 5
Since CRz is off, the AC 2it power supply V is turned off after time t4.
It becomes equal to the voltage of aC. In addition, the voltage ■ is the switch S of the remote control switch R3, which is connected to the normally closed terminal b.
If you switch to side 3, it will return to normal.

〔Effect of the invention〕

According to the remote control device of this invention,
In each of the plurality of remote control relays, a third diode is connected between one switching terminal of the changeover switch and the other end of the excitation coil with a polarity opposite to that of the first diode, and the fourth diode is connected between one changeover terminal of the changeover switch and the other end of the exciting coil. Since the second diode is connected between the other switching terminal of the switch and the other end of the excitation coil with the opposite polarity to the second diode, almost no loop current flows through the multiple remote control relays, and the loop current as in the conventional example is reduced. Almost no back electromotive force is generated in the excitation coil due to cutting, and malfunctions due to variations in the operating times of multiple remote control relays can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and FIG.
Figure 31 is a time chart showing the operation of the circuit in Figure 1.
';ll is a circuit diagram showing the configuration of a conventional example, and FIG. 4 is a time chart showing the operation of the circuit of FIG. 3. RY,,RYZ...Remote control relay, R
5...Remote control switch, L,,L. ...Exciting coil, St, St...changeover switch, D
3. . D21...first diode, D+z, Dz□・
...Second diode, D12. Dzz...3rd
diode, D+4+D24... fourth diode, 5CR1... first reverse blocking switching element, S
CRz: Second reverse blocking switching element; Figure 2

Claims (1)

[Claims] A plurality of remote control relays connected in parallel;
a remote control switch connected between an AC power source and the plurality of remote control relays, each of the plurality of remote control relays is connected to an excitation coil and a common terminal connected to one end of the excitation coil to excite the plurality of remote control relays; When the coil is energized in one direction, the movable contact is switched from one switching terminal to the other switching terminal, and when the excitation coil is energized in the other direction, the movable contact is switched from the other switching terminal to one switching terminal. a latching type changeover switch that is driven to change over; a first diode having one end connected to one changeover terminal of the changeover switch to pass current in one direction to the excitation coil; and a first diode having one end connected to the other changeover terminal of the changeover switch. a second diode that is connected to the switching terminal of the diode and whose other end is connected to the other end of the first diode to pass current in the other direction to the excitation coil;
a third diode connected with a polarity opposite to the first diode between one switching terminal of the changeover switch and the other end of the excitation coil; and a third diode connected to the other end of the changeover switch and the other end of the excitation coil. and a fourth diode connected in opposite polarity to the second diode, and the remote control switch is configured with a first diode that conducts current in the same direction as the current direction of the first diode. A remote control control device comprising a parallel circuit of a reverse blocking switching element and a second reverse blocking switching element that passes current in the same direction as the current direction of the second diode.