JPH0982194A - Semiconductor relay operation control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a semiconductor relay in place of a mechanical relay. SOLUTION: A predetermined operation start delay time (ta) is set in an operation start delay time setting part 13, and a predetermined operation stop delay time (tb) is set in an operation stop delay time setting part 14. When an operating voltage signal 2 is input from the outside, an operating voltage detecting part 12 detects that operating voltage input, and an operating timing part 15 starts counting time at the detection of the operating voltage input and, after the elapse of the operation start delay time (ta), outputs an operating signal 5 to a semiconductor relay 1 to operate the semiconductor relay. When the input of the operating voltage 2 is stopped, the operating timing part 5 starts counting time and, after the elapse of the operation stop delay time (tb), stops the operating signal output 5 to the semiconductor relay 1 to stop the action of the semiconductor relay. Thus the semiconductor relay 1 is operated in a desired response time Ta and restoration time Tb in response to the input of the relay operating voltage signal 2 from the outside and is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor relay operation control device for controlling the operation of a semiconductor relay.

[0002]

2. Description of the Related Art In general, a contactless semiconductor relay has a great difference in operating voltage and return voltage as compared with a mechanical relay. could not.

[0003]

Generally, the semiconductor type relay 1 has a structure as shown in FIG.
It is composed of a photoelectric element 1b that receives the light of the operating LED 1a and conducts an operation, and an output driver 1c that energizes during the conducting period of the photoelectric element 1b. When the output driver 1c of the stage is energized and the operating voltage 2 is interrupted, the output driver 1c acts to cut off.

A timing chart of operation of the semiconductor relay 1 is shown in FIG. 5. When an operating voltage 2 is applied, the semiconductor relay 1 is turned on with a delay of a moving time 3a at its rising, and the operating voltage 2 is interrupted. Then, at the time of its fall, it is shut off with a delay of the recovery time 3b. The impression time 3a and the recovery time 3b greatly differ depending on the magnitude of the current flowing through the operation LED 1a as shown in the input current-operation time characteristic graph of FIG.

Therefore, when a voltage signal for the relay operation is input from the outside, the semiconductor relay 1 responds to the voltage signal to start the operation within a predetermined moving time and to stop the voltage signal. In response, if an operation characteristic of stopping within a predetermined recovery time is to be provided, the operation LED 1a
Is set so that the input current to the LED is always constant, and the internal operation speed of the semiconductor relay 1 after the operation LED 1a emits light is adjusted to be constant, and a predetermined time has elapsed after the input of the external voltage signal is detected. LED1a
If a configuration is adopted in which the operating voltage 2 is applied to and the application of the operating voltage 2 to the operating LED 1a is stopped when a predetermined time elapses after the input of the voltage signal is interrupted, a semiconductor type relay is used instead of the conventional mechanical relay. It can be used.

The present invention has been invented based on the above consideration, and an object thereof is to provide a semiconductor relay operation control device which enables a semiconductor relay to be used in a place where a mechanical relay was conventionally used. To do.

[0007]

According to a first aspect of the present invention, there is provided a semiconductor relay operation control device comprising: a semiconductor relay having a contact portion made of a semiconductor element; and an operation voltage detection for detecting an operation voltage input from the outside. Section, an operation start delay time setting section for setting a predetermined operation start delay time, an operation stop delay time setting section for setting a predetermined operation stop delay time, and an operation voltage detection section when an operation voltage input is detected. When the time count starts and the operation timing section that outputs the operation signal of the semiconductor relay when the operation start delay time set by the operation start delay time setting section has elapsed, and the operation voltage detection section detects that the operation voltage has stopped Start time counting,
And a return timing unit for stopping the output of the operation signal from the operation timing unit when the operation stop delay time set by the operation stop delay time setting unit has elapsed.

According to another aspect of the semiconductor relay operation control device of the present invention, a predetermined operation start delay time is set in the operation start delay time setting section, and a predetermined operation stop delay time is set in the operation stop delay time setting section. Set it. When an operating voltage signal is input from the outside, the operating voltage detector detects the operating voltage input, the operation timing unit starts time counting when the operating voltage input is detected, and the operation start delay time setting unit sets it. When the operation start delay time has elapsed, an operation signal is output to the semiconductor relay to operate the semiconductor relay.

Further, when the operating voltage input from the outside is interrupted, the stop timing section starts time counting when the operating voltage stop is detected, and when the operation stop delay time set by the operation stop delay time setting section has elapsed, the semiconductor type The operation signal output to the relay is stopped to stop the operation of the semiconductor relay.

As a result, the semiconductor type relay is operated with a desired excitement time and a desired recovery time in response to the input of a relay operation voltage signal from the outside, and the semiconductor relay is stopped.

According to a second aspect of the invention, in the semiconductor relay operation control device of the first aspect of the invention, the operation start delay time setting section is provided with a variable setting means for the operation start delay time, and the operation stop delay time setting section operates. A variable setting means for the stop delay time is provided.

According to another aspect of the semiconductor relay operation control device of the present invention, the operation start delay time setting section is provided with a variable setting means for the operation start delay time, and the operation stop delay time setting section is provided for changing the operation stop delay time. By providing the setting means, the moving time and the return time can be variably set, and the operation characteristics can be flexibly adjusted according to the place to be used instead of the mechanical relay.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a functional block diagram of an embodiment of the present invention, which comprises a relay operation control circuit 10 and a semiconductor relay 1.

The relay operation control circuit 10 outputs an operation command detection signal 4a when the relay operation voltage signal 2 inputted from the outside becomes a predetermined voltage or more, and the relay operation voltage signal 2 is outputted.
If the voltage drops below a predetermined voltage, the input voltage detection unit 12 that outputs the stop command detection signal 4b and the operation start delay time ta from the operation command detection timing to the operation control command 5 to the semiconductor relay 1 are set. An operation start delay time setting unit 13, an operation stop delay time setting unit 14 that sets an operation stop delay time tb from the stop command detection timing until the output of the operation control command 5 to the semiconductor relay 1 is actually stopped, and an input voltage Time counting is started at the time of receiving the operation command detection signal 4a from the detection unit 12, and the operation control command 5 is output to the semiconductor relay 1 when the delay time ta set in the operation start delay time setting unit 13 has elapsed, Time counting is started when the stop command detection signal 4b is received from the input voltage detection unit 12, and the operation stop delay time setting unit 14 is started.
The comparator circuit 15 is provided for stopping the output of the operation control command 5 when the operation stop delay time tb set in (1) has elapsed.

The semiconductor relay 1 has the structure shown in FIG. 4, but in order to make the internal operating speed peculiar to the semiconductor relay 1 constant by giving a predetermined drive current to the operating LED 1a when it is conducting. The constant voltage circuit 16 of is connected.

Next, the operation of the semiconductor relay operation control device having the above configuration will be described. The constant voltage circuit 16 is set to apply a constant voltage to the operating LED 1a of the semiconductor relay 1 and supply a constant operating current Ia when the operating LED 1a is turned on. That is, in the input current operating time characteristic graph shown in FIG. 6, the characteristic time of the semiconductor relay 1 is set to Sa (the characteristic recovery time Sb is a pair with the characteristic time Sa as the operating characteristic of the semiconductor relay shown in FIG. 2). In the case of one relationship, the reset time Sb is uniquely determined by the setting of the moving time Sa). If the LED current Ia corresponding to the desired time is read, the LED current Ia is set to be energized. Thus, as shown in FIG. 2, if the operation control command 5 is input from the relay operation control circuit 10 side, the semiconductor relay 1
On the other hand, when the peculiar impression time Sa elapses from the input timing tu, the relay operation 6 is output by outputting conduction, and conversely, when the input of the operation control command 5 is stopped, it is cut off after the peculiar return time Sb elapses from the stop timing td It is set to operate and stop the relay output 6.

When the setting on the semiconductor relay 1 side is completed,
This semiconductor type relay 1 and the relay operation control circuit 10
Incorporate a mechanical relay into a place where a mechanical relay was previously incorporated, and connect the relay operation voltage signal input terminal to the input voltage detection unit 12 of the relay operation control circuit 10.
The output of the semiconductor relay 1 is connected to the relay output end.

In the semiconductor relay operation control device thus assembled, if the relay operation voltage signal 2 is input from the outside at the timing t0 as shown in FIG. The rising edge of the signal 2 is detected and the operation command detection signal 4a is output to the comparison circuit 15 as shown in FIG. The comparator circuit 15 receives the operation command detection signal 4a and starts time counting, and as shown in FIG.
The operation control command 5 is output to the semiconductor relay 1 at the timing t1 when the delay setting time ta set to 3 has elapsed. On the side of the semiconductor relay 1, the operation LED 1a conducts at the timing t1 when the operation control command 5 is input as shown in (e) of the figure, and the relay operation is performed at the timing t2 after the delay of the specific internal moving time Sa. And the relay operation signal 6 is output.

As a result, according to this semiconductor relay operation control device, the relay operation is started after the impression time Ta (= ta + Sa) has elapsed since the operation voltage signal 2 was input at the first timing t0. .

On the contrary, the relay stop operation is as follows. As shown in FIG. 3A, when the relay operating voltage signal 2 falls below a predetermined voltage at timing t3, the input voltage detector 12 detects the falling edge of the signal 2 as shown in FIG. 3C. The stop command detection signal 4b is output. Comparison circuit 1
5 receives the stop command detection signal 4b to start time counting, and at the timing t4 when the delay set time tb set in the operation stop delay time setting unit 14 has elapsed as shown in FIG. The output of the operation control command 5 to the relay 1 is stopped. On the semiconductor relay 1 side, the operation LED 1a stops operating at the timing t4 when the operation control command 5 is stopped as shown in FIG. 7E, and the relay operation is stopped at the timing t5 after the delay of the unique recovery time Sb. Then, the output of the relay operation signal 6 is stopped.

As a result, according to this semiconductor relay operation control device, the relay operation is stopped after the recovery time Tb (= tb + Sb) elapses after the input of the operation voltage signal 2 is stopped at the timing t4. .

In this way, according to the semiconductor relay operation control device of this embodiment, the semiconductor relay 1 side is set with its own moving time Sa and recovery time Sb, and the relay operation control circuit 10 side is set. The delay time until the operation starts and the delay time until the operation stop can be variably set, so that the relay operation time can be changed according to the circuit characteristics of the place where the semiconductor relay 1 is used instead of the conventional mechanical relay. It becomes possible to variably set, and it becomes possible to easily use a semiconductor type relay in place of the mechanical relay in a place where the mechanical relay has been conventionally used.

[0023]

As described above, according to the invention of claim 1,
Set a predetermined operation start delay time in the operation start delay time setting section and a predetermined operation stop delay time in the operation stop delay time setting section, and detect the operating voltage when an operating voltage signal is input from the outside. Section detects the operating voltage input, the operation timing section starts time counting when the operating voltage input is detected, and the operation signal is sent to the semiconductor relay when the operation start delay time set by the operation start delay time setting section has elapsed. When the operating voltage input from the outside is interrupted, the stop timing section starts time counting when the operating voltage stop is detected,
When the operation stop delay time set by the operation stop delay time setting unit elapses, the operation signal output to the semiconductor relay is stopped to stop the operation of the semiconductor relay, so the relay operation voltage signal from the outside In response to input, the semiconductor relay can be operated and stopped with the desired excitement time and recovery time, and it can be used in place of the conventional mechanical relay instead. Like

According to the second aspect of the invention, the operation start delay time setting unit is provided with the operation start delay time variable setting means, and the operation stop delay time setting unit is provided with the operation stop delay time variable setting means. Therefore, the moving time and the return time can be variably set, and the semiconductor relay of the same use can be used in place of the mechanical relay having various operating characteristics.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of one embodiment of the present invention.

FIG. 2 is a timing chart showing the unique operating characteristics of the semiconductor relay according to the above-described embodiment.

FIG. 3 is a timing chart showing the operating characteristics of the entire semiconductor relay operation control device of the above embodiment.

FIG. 4 is a block diagram showing an internal configuration of a general semiconductor relay.

FIG. 5 is a timing chart showing operating characteristics of a general semiconductor relay.

FIG. 6 is a graph showing an input current-operating time characteristic of a general semiconductor relay.

[Explanation of symbols]

 1 semiconductor type relay 1a operation LED 1b photoelectric element 1c output driver 2 operation voltage signal 4a operation command detection signal 4b stop command detection signal 5 operation control command 6 relay operation signal 10 relay operation control circuit 12 input voltage detection unit 13 operation start delay time Setting unit 14 Operation stop delay time setting unit 15 Comparison circuit 16 Constant voltage circuit

Claims (2)

[Claims] 1. A semiconductor-type relay whose contact portion is composed of a semiconductor element, an operating voltage detection portion for detecting an operating voltage input from the outside, and an operation start delay time setting portion for setting a predetermined operation start delay time. An operation stop delay time setting unit for setting a predetermined operation stop delay time, and an operation set by the operation start delay time setting unit for starting time counting when the operation voltage detection unit detects an input of the operation voltage. An operation timing unit that outputs an operation signal of the semiconductor relay when a start delay time has elapsed, and a time count is started when the operation voltage detection unit detects a stop of the operation voltage, and the operation stop delay time setting unit is A semiconductor-type relay operation comprising: a return timing section that stops the output of the operation signal of the operation timing section when a set operation stop delay time has elapsed. The control device. 2. The semiconductor device according to claim 1, wherein the operation start delay time setting unit is provided with operation start delay time variable setting means, and the operation stop delay time setting unit is provided with operation stop delay time variable setting means. Relay operation control device.