KR101310956B1 - Multi channel ssr module - Google Patents

Abstract

The present invention relates to a multi-channel SSR module for controlling a plurality of loads, the main body provided with a plurality of load terminals; A plurality of SSR elements embedded in the main body and aggregated to be connected one-to-one to the load terminal; And an SSR controller for controlling the operations of the plurality of SSR elements, and individually controlling the duty cycles of the plurality of SSR elements in a time division manner.

Description

Multichannel SSR Modules {MULTI CHANNEL SSR MODULE}

The present invention relates to a solid state relay (SSR) module, and more particularly, to a multi-channel SSR module having a structure capable of efficiently controlling a plurality of loads.

SSR performs switching operation through semiconductor devices such as triac, silicon rectifier (SCR), transistor (TR), field effect transistor (FET), and insulated gate bipolar transistor (IGBT) instead of mechanical contacts. Compared with mechanical relays, it has low noise, high reliability, small size, fast response, and is used as various automation devices and temperature control relays.

The SSR includes a photocoupler driven by an input control signal and a semiconductor switching element selectively operated according to an electrical signal generated by the photocoupler.

Recently, the SSR is widely used for controlling a plurality of heaters individually. In this case, as shown in FIG. 1, the SSR 10 of the short channel is connected to each heater 20 to operate the heater. It is common to control them individually. The SSR 10 includes a main body having a predetermined shape formed of an insulating material, and an SSR element embedded in the main body.

However, the conventional SSR has to be provided as many as the number of heaters in order to control a large number of heaters, which not only increases the temperature control system but also has a disadvantage in that the control circuit becomes complicated due to the need to control a plurality of inputs in an analog manner. .

On the other hand, when a large number of heaters on (on) / off (off) control collectively, as shown in Figure 2, as the on time and off time of all loads coincide very large current is turned on / off power At the time when a temporary overload condition of the facility capacity has occurred, it is temporarily undervoltageed, and at the time of off, it temporarily causes an overvoltage condition. In FIG. 2, the sections A and C represent a section in which the control outputs are synthesized to temporarily drop the output voltage, and the section B represents a section in which the control output is paused to temporarily increase the output voltage.

The present invention has been made to solve the above problems, to provide a multi-channel SSR module having a structure that can be miniaturized and a plurality of loads can be individually controlled by a plurality of SSR is assembled in one main body The purpose is.

Another object of the present invention is to provide a multi-channel SSR module having a structure capable of communication control of a plurality of SSRs.

In order to achieve the above object, the present invention is to control a plurality of loads, the main body provided with a load terminal to connect a plurality of loads; A plurality of SSR elements embedded in the main body and aggregated to be connected one-to-one to the load terminal; And a time division controller for controlling the operations of the plurality of SSR elements, and individually controlling the duty cycles of the plurality of SSR elements in a time division format.

The present invention may further include a communication module provided in the main body to provide a communication interface for transmitting a digital control signal input from the outside to the SSR controller.

The present invention provides an analog signal input terminal provided in the main body to have a one-to-one correspondence with the plurality of SSR elements; And an operation mode change switch provided in the main body to provide a switching function between the communication control mode by the communication module and the analog mode by the analog signal input terminal.

The time division controller may sequentially drive the plurality of SSR elements one by one such that operation intervals of the plurality of SSR elements do not overlap and have a uniformly distributed duty cycle.

According to the present invention, since a multi-channel SSR module in which a plurality of SSR elements are collected in one main body is provided, the device can be miniaturized, easy to handle, and easy to expand the channel.

According to the present invention, by digitally controlling a plurality of heaters in a time-division format, the on / off time points of the loads can be distributed without overlap, thereby eliminating problems such as temporary shortage and overvoltage.

In addition, according to the present invention, since the multi-channel SSR module capable of communication control is provided, it is possible to remotely control the heater of the temperature control system using a computer.

When the present invention is applied, it is possible to implement a temperature control system that can continuously and individually control the temperature of the heater differently for each set temperature zone.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention. And should not be construed as limiting.
1 is a circuit diagram showing the configuration of a temperature control system with a single channel SSR according to the prior art;
2 is a waveform diagram illustrating a control method for a plurality of heaters in FIG. 1;
3 is a perspective view showing the appearance of a multi-channel SSR module according to an embodiment of the present invention;
4 is a block diagram showing a detailed configuration of a temperature control system to which a multi-channel SSR module is applied according to a preferred embodiment of the present invention;
FIG. 5 is a waveform diagram illustrating a time division output waveform of an SSR element performed by the SSR controller in FIG. 4. FIG.
6 is a waveform diagram illustrating a time division controlled output waveform with 50% output performed in accordance with a preferred embodiment of the present invention;
7 is a conceptual diagram of a zone temperature control system to which a multi-channel SSR module is applied according to an exemplary embodiment of the present invention;
8 is an actual wiring diagram illustrating an example in which an channel of an SSR module according to the present invention is expanded.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

3 shows the appearance of a multi-channel SSR module according to a preferred embodiment of the present invention, and FIG. 4 shows a detailed configuration of the multi-channel SSR module according to a preferred embodiment of the present invention.

3 and 4, the multi-channel SSR module 100 according to an exemplary embodiment of the present invention includes a main body 101 having a predetermined shape and a plurality of load terminals installed to be exposed to the outside of the main body 101. 102, a plurality of SSR elements 103 assembled in the main body 101 so as to correspond one-to-one with the load terminal 102, an SSR control unit 104 for controlling the plurality of SSR elements 103, and A protective fuse 105 interposed between the SSR element 103 and the load terminal 102 and the SSR element 103 provided so as to be exposed to the outside of the main body 101 while corresponding to each SSR element 103. And an operation display lamp 106 for displaying an operation state of the load.

The main body 101 has a substantially rectangular body of insulating material. The upper portion of the body is provided with a power supply 107, the load terminal 102 and the protective fuse 105, the lower portion is provided with a heat sink 110 to provide a cooling function by natural convection.

A part of the upper body of the main body 101 includes a plurality of load terminals 102 and a protective fuse 105 connected in series to each load terminal 102 one-to-one to protect a circuit, and the load terminal 102 and the protection. The transparent cover 109 is provided to be opened and closed with respect to the fuse 105. The transparent cover 109 is configured in the form of a plate covering the plurality of load terminals 102 and the protective fuse 105 collectively, and is rotatable to selectively expose the load terminal 102 and the protective fuse 105. It is mounted to the main body 101. According to this configuration, the connection of the heater 201 to the load terminal 102 or the fuse replacement operation can be performed quickly and simply.

The load terminal 102 is preferably for connecting a load corresponding to the heater and is configured in the form of a conventional screw type terminal capable of inserting and fixing a predetermined conductor extending from the load.

The other part of the body upper surface of the main body 101 is provided with an operation mode switching switch 112 for selecting an operation mode of the multi-channel SSR module 100. The operation mode switching switch 112 provides a switching function between a digital communication mode for communication control of the multi-channel SSR module 100 and an analog mode for one-to-one control of each SSR element 103 using individual signals. do. In this case, when the analog mode is selected, an individual operation signal of DC 4-32V may be input to each SSR element 103 using the analog signal input terminal 111.

The plurality of SSR elements 103 is built in the main body 101 to be connected to the load terminal 102 one-to-one. Although, in the preferred embodiment of the present invention, an example in which 10 SSR elements 103 are arranged in one main body 101 to support 10 channels of outputs is shown, the number of channels is not limited to this example. Of course, it can be modified.

Each SSR element 103 includes a photocoupler driven by an input control signal and a semiconductor switching element selectively operated according to an electrical signal generated by the photocoupler. Although FIG. 4 shows an example in which a triac (TRIAC) is employed as the semiconductor switching device, a silicon rectifier (SCR), a transistor (TR), a field effect transistor (FET), and an insulated gate bipolar transistor (IGBT) are not limited thereto. Of course, may be employed.

The SSR controller 104 controls the duty cycle at various output ratios as shown in FIG. 5 for each SSR element 103, and is provided in the form of a microprocessor.

The SSR control unit 104 individually controls the duty cycle of each SSR element 103 in a time division manner. Preferably, the SSR controller 104 drives a plurality of SSR elements 103 one by one, as shown in FIG. 6, but controls the on / off sections of the respective SSR elements 103 so that they do not overlap. do. According to the control operation of the SSR control unit 104 as described above, since the plurality of SSR elements 103 have duty cycles uniformly distributed like the section D without overlapping the operation section, the output voltage temporarily rises or falls. I never do that.

Preferably, one side of the main body 101 is provided with a communication module 108 to transmit the digitized control signal input from the outside to the SSR controller 104. The communication module 108 is configured with, for example, an RS-485 standard equipped with a MODBUS protocol, and provides an interface for externally controlling the multi-channel SSR module 100 using, for example, a computer.

The multi-channel SSR module 100 according to the preferred embodiment of the present invention is applied to a temperature control system having a heater array 200.

The plurality of heaters 201 forming the heater array 200 may be grouped in plural numbers so as to be divided into a plurality of temperature zones. In FIG. 7, an example in which the heater array 200 is divided into four temperature zones ZONE A to D is illustrated. Here, the heater 201 belonging to the same temperature zone may be controlled to have the same duty cycle. That is, the SSR controller 104 may control the heater 201 group belonging to the temperature zones A, B, C, and D to have output waveforms of 10%, 90%, 20%, and 100%, respectively. According to this configuration, in order to minimize the processing failure of the material due to partial mass difference and structural height difference, for example, in the manufacturing process of a large display panel or the vacuum casting process of a large plastic structure such as a refrigerator internal structure, the heating temperature is partially. This can be very useful when you want to make a difference.

When a plurality of heaters 201 are used in the temperature control system, as shown in FIG. 8, the multi-channel SSR module 100 according to the preferred embodiment of the present invention has a plurality of channels which are expanded to combine up to 990 channels. It may be provided in a form that can individually control the heater.

As described above, according to the present invention, since a plurality of heaters are controlled in a time-division format in one multi-channel SSR module, the temperature control system can be miniaturized, the channel can be easily expanded, and problems such as voltage shortage and overvoltage can be avoided. There is a significant effect that can be solved.

The multi-channel SSR module according to the present invention is preferably controlled by a digital control signal input by a computer or the like from the outside. In this case, the SSR controller 104 embedded in the multi-channel SSR module controls the duty cycles of the plurality of SSR elements individually according to the input communication control signal to control a plurality of heaters corresponding to the SSR elements 103 in a time divisional format. do.

On the other hand, the multi-channel SSR module according to the present invention may be operated by switching to the analog mode by the operation mode switch 112. In this case, the SSR control unit 104 built in the multi-channel SSR module drives each SSR element 103 one-to-one in accordance with an individual operation signal of DC 4-32V input through the analog signal input terminal 111. The heater can be controlled.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

100: multi-channel SSR module 101: main body
102: load terminal 103: SSR element
104: SSR control unit 105: protection fuse
106: operation display lamp 107: power supply
108: communication module 109: transparent cover
110: heat sink 111: analog signal input terminal
112: operation mode switch 200: heater array
201: Heater

Claims (4)

In the multi-channel SSR module for controlling a plurality of loads,
A main body provided with a plurality of load terminals;
A plurality of SSR elements embedded in the main body and aggregated to be connected one-to-one to the load terminal;
An SSR controller for controlling operations of the plurality of SSR elements, and individually controlling duty cycles of the plurality of SSR elements in a time division format;
A communication module provided in the main body and providing a communication interface for transmitting a digital control signal input from the outside to the SSR controller;
An analog signal input terminal provided in the main body so as to correspond one-to-one with the plurality of SSR elements; And
And an operation mode switching switch provided in the main body to provide a switching function between the digital communication mode by the communication module and the analog mode by the analog signal input terminal. delete delete The method of claim 1,
The SSR control unit drives the plurality of SSR elements sequentially one by one such that operation intervals of the plurality of SSR elements do not overlap and have a uniformly distributed duty cycle.

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