JPH0441446B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a remote control relay control device, which sometimes controls a plurality of remote control relays according to a preset pattern and in synchronization with the phase of an AC power supply. This invention relates to a remote control relay control device that controls the opening and closing of a remote control relay.

[Conventional technology]

As a conventional device of this kind, there was a device as shown in FIG. Figure 2 shows, for example, JP-A-57-
The remote control relay control device disclosed in Publication No. 119431 is shown in FIG. 2, and includes a plurality of remote control relays each having an output contact G and a control input circuit B that controls opening and closing of the output contact G depending on the direction of current flow. Diodes D ₁ , D ₂ , D ₅ D ₆ are connected to each control input circuit B of A, and output contacts of a mechanical relay are connected to each of the diodes D _{1 ,} D ₂ D ₅ , D ₆ . C, H _1a and H _1b are connected in series, and the plurality of remote control relays A are controlled by controlling the mechanical relays C, H _1a and H _1b .

Since the conventional remote control relay control device is configured as described above, the mechanical relays C, H _1a ,
Consumes a lot of power to excite the coil of H _1b ,
It cannot operate at high speed, and the noise when the relay operates is loud.
In addition, the device becomes large in size and requires a current amplification circuit for excitation of the coil, which increases the cost.

For this reason, a remote control relay control device was constructed one step before the present invention as shown in FIG. FIG. 3 is an electrical wiring diagram showing a remote control relay control device at a step before the present invention. Third
In the figure, first to nth remote control relays 1a to
1n denotes first to nth output contacts 2a to 2n that are controlled to open and close, respectively, and first to nth control input circuits 3a to 3n that control the opening and closing of the output contacts 2a to 2n depending on the direction of current flow. and respectively. The first to nth current direction control circuits 4a to 4n are
- A pair of unidirectional semiconductor switches, such as thyristors, which control the direction of current flow in the n-th control input circuits 3a-3n, and are connected in series to the first to n-th control input circuits 3a-3n. 5a-5
It consists of anti-parallel circuits of n, 6a to 6n. The pattern control circuit 7 controls opening and closing of the pair of unidirectional semiconductor switches 5a to 5n, 6a to 6n according to a preset pattern.
A pair of unidirectional semiconductor switches 5a to 5n, 6a of the n-th current direction control circuits 4a to 4n, respectively
Control pole circuits 8a to 8n, 9a to 9n connected to the control poles of ~6n, respectively, and control pole circuits 8a to 8n, 9a to 9n of the first to nth current direction control circuits 4a to 4n, respectively. Each switch is comprised of a control circuit 10 that applies a potential to control opening and closing of a pair of unidirectional semiconductor switches 5a-5n, 6a-6n in accordance with a predetermined pattern. The control pole circuits 8a to 8n each include a constant voltage element 1, which is a Zener diode, for example, and whose negative pole is connected to the control pole of the unidirectional semiconductor switches 5a to 5n.
1a to 11n and resistors 12a to 12n, one end of which is connected to the positive electrode of the constant voltage elements 11a to 11n, and a series circuit of the constant voltage elements 11a to 11n and the resistor 12.
Input photocouplers 13a-1 whose positive electrodes are connected to the connection points with a-12n and generate light when current flows
3n, and a diode 1 for backflow prevention whose anode is connected to the negative electrode of the input photocouplers 13a to 13n.
It consists of a series circuit with 4a to 14n. The control circuits 9a to 9n are unidirectional semiconductor switches 6
It consists of a series circuit of output photocouplers 15a to 15n, which receive light from input photocouplers 13a to 13n connected between the positive electrodes of a to 6n and the control electrode, and conductive, and resistors 16a to 16n.
The control circuit 10 has a clock generation circuit 17 that generates a clock signal, and a clock signal from the clock generation circuit 17 is input to an input terminal CL, and sequentially outputs to output terminals Q ₁ to Qn in synchronization with the input clock signal. The counter circuit 18 and the outputs of the output terminals Q ₁ to Qn of the counter circuit 18 are sequentially input to the input terminal B ₁
-Bn and outputs to the output terminal C according to a preset pattern in synchronization with the outputs of the output terminals _{Q1 to} Qn, Qn is connected to the other end of the resistors 12a to 12n, and the output terminal C of the pattern determination circuit 19 is connected to the other end of the resistor 12a to 12n.
14n is connected to each cathode. The control circuit 10 controls the respective first and second output terminals and Q depending on the open/closed states of the switches 20a to 20m.
The flip-flop circuits 21a to 21m are provided with first to m-th flip-flop circuits 21a to 21m whose output states are switched, and the outputs of the first output terminal or second output terminal Q of each of the flip-flop circuits 21a to 21m are connected through a gate circuit 22. A voltage is applied to the reset terminal R of the counter circuit 18 to reset the counter circuit 18 when any of the switches 20a to 20m are open or closed.
The pattern determination circuit 1 outputs the outputs from the second output terminal Q or the first output terminal of each of a to 21m.
9 to the input terminals A ₁ to Am to cause the pattern determination circuit 19 to determine the pattern. Resistor 23a~
23m is connected in series to the switches 20a to 20m, and is connected between the DC power supply connection terminal (+) and ground. The AC power supply 24 supplies current to the first to nth remote control relays 1a to 1n.

Next, the operation will be explained. Now switch 20
When any one of a to 20m is closed, the corresponding flip-flop circuit 21a to 21m is set, and the output of its first output terminal is set to L level, and the output of its second output terminal Q is set to H level. . Therefore, the counter circuit 18 starts operating, and the pattern determination circuit 19 switches 20a to 20a.
The pattern is determined based on the closed state of 0m, and a pattern corresponding to the open/closed state of the switches 20a to 20m is set using, for example, a dip switch (not shown), and a pattern signal of H level and L level is output from the output terminal C. , the output terminal Q ₁ of the counter circuit 18
~ Output in synchronization with the output from Qn. When the counter circuit 18 starts operating, the counter circuit 18
synchronizes with the clock signal of the clock generating circuit 17 and sequentially shifts and outputs H level pulse outputs to the output terminals Q ₁ to Qn. The outputs from the output terminals Q ₁ to Qn become gate trigger signals for the pair of unidirectional semiconductor switches 5a to 5n, 6a to 6n, as will be explained in detail next, and the timing of the outputs from the output terminals Q ₁ to Qn. A pair of unidirectional semiconductor switches 5a
5n and 6a to 6n are sequentially made conductive. At this time, it is the output of the output terminal C of the pattern determination circuit 19 that determines which one is made conductive.If the output of the output terminal C is at H level, the diodes 14a to 14n are non-conductive, so the counter circuit The outputs of the output terminals Q ₁ to Qn of 18 are connected to the resistors 12a to 12n and the constant voltage elements 11a to 1
1n, the unidirectional semiconductor switches 5a~
5n is triggered to make the unidirectional semiconductor switches 5a to 5n conductive. On the other hand, if the output of the output terminal C of the pattern determination circuit 19 is at L level, the constant voltage elements 11a to 11n become non-conductive.
Output terminal Q ₁ ~ Qn of counter circuit 18 → resistor 12
a~12n → input photocoupler 13a~13n
→diodes 14a to 14n→pattern determination circuit 19 A closed circuit of output terminal C is formed, current flows through the input photocouplers 13a to 13n, and the input photocouplers 13a to 13n emit light. This light emission is received by the output photocouplers 15a to 15n and conducts, and a trigger signal from the AC power supply 24 etc. is sent to the gates of the unidirectional semiconductor switches 6a to 6n via the resistors 16a to 16n. Switches 6a to 6n become conductive.

[Problem that the invention seeks to solve]

As described above, in the remote control relay control device one step before the present invention, the clock generation circuit 17
Since the pair of unidirectional semiconductor switches 5a to 5n, 6a to 6n are controlled to open and close in synchronization with the clock signal from the Otherwise, the first to nth remote control relays 1a to 1n may be operated, resulting in a problem that the operation of the first to nth remote control relays 1a to 1n becomes unstable.

The present invention has been made to solve the problems of the conventional devices as described above, and an object of the present invention is to provide a remote control relay control device that can stably operate the first to nth remote control relays.

[Means for solving problems]

A remote control relay control device according to the present invention is provided with a synchronization adjustment circuit that operates first to nth remote control relays in synchronization with the phase of an AC power source.

[Effect]

The present invention stabilizes the operation of the first to nth remote control relays by operating the first to nth remote control relays in synchronization with the phase of the AC power supply using a synchronization adjustment circuit.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical wiring diagram showing an embodiment of a remote control relay control device according to the present invention. In the figure, the same parts as in FIG. 3 are given the same reference numerals. 1st
In the figure, a synchronization adjustment circuit 25 generates a clock signal synchronized with an AC power source 24, and consists of the following components. The input photocoupler 26 generates light when current flows, and the output photocoupler 29 is connected in antiparallel to the diode 27 and connected to the AC power supply 24 via the resistor 28. It receives light and becomes conductive, and is connected to a DC power supply (+) via a resistor 30. The filter circuit 31 is
The input side is connected to the connection point between the output photocoupler 29 and the resistor 30, and noise in the power synchronization waveform obtained by the output photocoupler 29 is removed. The knot circuit 32 shapes the power synchronization waveform from which noise has been removed by the filter circuit 31. The frequency dividing circuit 33 is
After dividing the power synchronization waveform shaped by the knot circuit 32 into an appropriate cycle for operating the first to n-th remote control relays 1a to 1n, the counter 18
input as a clock signal to input terminal CL of

Next, the operation will be explained. When a current flows through the resistor 28 to the input photocoupler 26 in synchronization with the voltage of the AC power supply 24, the input photocoupler 26 generates light. When the output photocoupler 29 receives this light, the output photocoupler 29 becomes conductive, and a power synchronized waveform synchronized with the AC power supply 24 is input to the filter circuit 31 . After noise is removed by the filter circuit 31, the signal is shaped into a waveform by the knot circuit 32, and is cycled by the frequency divider circuit 33 at an appropriate cycle to operate the first to nth remote control relays 1a to 1n, and then input to the counter 18. Input to terminal CL.

In the above embodiment, the filter circuit 31 is used to remove noise, but if the noise of the AC power supply 24 can be ignored, there is no need to provide it, and any known noise removal circuit may be used instead of the filter circuit 31. It's okay. Furthermore, if there is no need to frequency divide the power synchronization waveform, it is not necessary to provide a frequency divider circuit. Furthermore, the Zener voltage of the Zener diodes used as the constant voltage elements 11a to 11n is determined by the diodes 14a to 14n and the input coupler 1.
It is necessary to select a value larger than the sum of the voltage drop caused by 3a to 13n and the output potential of the output terminal C of the pattern determination circuit 19. Further, in the above embodiment, Zener diodes were used as the constant voltage elements 11a to 11n, but voltage drops due to resistances may be used, or a plurality of diodes connected in series in the forward direction may be used. It shall be called a constant voltage element. Furthermore, although thyristors are used as the unidirectional semiconductor switches 5a-5n, 6a-6n, transistors may be used instead. Furthermore, input and output photocoupler 13
Although a device using elements a to 13n and 15a to 15n is shown, a thyristor or CdS may be used instead, and these are collectively referred to as switching elements. Furthermore, in the above embodiment, the first to
The m-th flip-flop circuits 21a to 21m,
In the case where the counter circuit 18 is reset by the output of each first output terminal,
The counter circuit 18 may be reset by the output of each second output terminal Q.

〔Effect of the invention〕

The present invention is configured as described above, and since the synchronization adjustment circuit is provided to obtain a clock signal synchronized with the phase of the AC power source, the first to nth remote control relays can be stably operated. It saves power, operates at high speed, produces no noise during relay operation, is small and inexpensive, and provides stable operation.

[Brief explanation of the drawing]

FIG. 1 is an electrical wiring diagram showing an embodiment of a remote control relay control device according to the present invention, FIG. 2 is an electrical wiring diagram showing a conventional remote control relay control device, and FIG.
The figure is an electrical wiring diagram showing a step-by-step remote control relay control device according to the present invention. In the figure, 1a to 1n are first to nth remote control relays, 2a to 2n are first to nth output contacts,
3a to 3n are first to nth control input circuits; 4a;
~4n are first to nth current direction control circuits, 5a~
5n, 6a to 6n are unidirectional semiconductor switches, 7
are pattern control circuits, 8a to 8n, 9a to 9n are control electrode circuits, 10 is a control circuit, 11a to 11n
is a constant voltage element, 12a-12n are resistors, 13a-
13n is an input photocoupler, 14a to 14n are diodes, 15a to 15n are output photocouplers, 16a to 16n are resistors, 17 is a clock generation circuit, 18 is a counter circuit, 19 is a pattern judgment circuit, 20a to 20n are switches, 21a ~21
m is the first to mth flip-flop circuits, 22 is a gate circuit, 23a to 23m are resistors, 24 is an AC power supply, 25 is a synchronous adjustment circuit, 26 is an input photocoupler, 27 is a diode, 28 is a resistor, and 29 is an output 30 is a resistor 31 is a filter circuit, 32 is a knot circuit, and 33 is a frequency dividing circuit. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Scope of Claims] 1. A plurality of remote control relays each having an output contact and a control input circuit that controls opening and closing of the output contact depending on the direction of current flow; a control input circuit for each of the plurality of remote control relays; a plurality of current direction control circuits each consisting of an anti-parallel circuit of a pair of unidirectional semiconductor switches connected in series, each pair of unidirectional semiconductor switches of the plurality of current direction control circuits being connected according to a preset pattern; A remote control relay control device comprising: a pattern control circuit that controls opening and closing of the pattern control circuit; and a synchronization adjustment circuit that synchronizes the opening and closing control of the pattern control circuit with the phase of AC power applied to the plurality of remote control relays. 2. The synchronous adjustment circuit includes a switching element that allows current to flow during a half cycle of the AC power supply, a filter circuit that removes noise from the current that has passed through the switching element, and a frequency divider circuit that divides the frequency of the current that has passed through the filter circuit. A remote control relay control device according to claim 1, comprising: 3. The switching element is characterized by comprising an input photocoupler that generates light by passing a current during a half cycle of the AC power supply, and an output photocoupler that receives light from the input photocoupler and conducts. A remote control relay control device according to claim 2.