KR20240103296A - Power control unit having power cut-off by external contact signal - Google Patents

Abstract

The present invention implements an external emergency stop expansion circuit that is provided with a plurality of emergency stop switches on the outside and these switches contact the power line of the internal circuit. In the event of an emergency, the power is cut off by cutting off the power line of the internal circuit by an external contact signal. It relates to a power control device, which includes an external emergency stop switch including at least one emergency stop switch provided on the outside of the power control device, a line-in terminal through which supply power is input to the power control device, and a line A line-out terminal is used to supply power applied through the in terminal to each external device. It is connected in series to the power line connecting both terminals, and the contact point of the power line is turned on and off by the electromagnetic force of the internal coil. A magnetic contactor that turns off the external emergency stop switch is connected in series to the operation power line connected to the coil of the magnetic contactor, and in case of an emergency, when an external contact signal is applied to the external emergency stop switch by the user's operation, the magnetic contactor turns off. It includes an external emergency stop expansion circuit that cuts off the operating power line connected to the contactor and turns off the magnetic contactor thereby blocking the power applied to the line out terminal.

Description

Power control device with power-off function by external contact signal {POWER CONTROL UNIT HAVING POWER CUT-OFF BY EXTERNAL CONTACT SIGNAL}

The present invention relates to a power control device applied to vehicle battery cell simulation, real-time computers, various input/output modules, etc., and more specifically, to a power cutoff function by an external contact signal that can cut off power by an external contact signal in an emergency. The branch concerns power control devices.

Recently, as the development of electric vehicles and autonomous vehicles has become active, the development of electronic control devices related to them has also become active.

As part of this, equipment is being provided that supports efficient development of automotive electronic control units (ECUs) by modeling or simulating vehicle batteries or driving environments. For example, there are vehicle battery cell simulation equipment, equipment for verifying electronic controllers applied to the vehicle's powertrain, body, and chassis, real-time computer equipment, and various input/output modules.

These devices require a power control unit (PCU) to distribute and supply power to the electronic controllers within the device.

Generally, the power control device can be implemented in the form of a PCB and mounted on the electrical board (electrical device component) of each equipment, or when implemented as a finished product like a single equipment, it can be electrically connected to each equipment through a cable.

At this time, the power control device is separately equipped with an emergency stop switch that is operated by the user and is used to cut off the power in an emergency.

However, when the power control device is integrated into other equipment and implemented as a single system module as shown in FIG. 1, or furthermore, when the system module is mounted and stored in a case, the emergency stop switch is not operated quickly and the power is lost. It has the problem of missing the emergency time when it needs to be blocked.

Therefore, when a short circuit occurs in the power control device or when the power of the power control device must be urgently turned off due to other causes, and there is no time to spare, there is a need for a countermeasure that can immediately turn off the power.

Republic of Korea Patent No. 10-0287000 (registered on January 18, 2001)

The present invention is intended to solve the above problems, and implements an external emergency stop expansion circuit that is provided with a plurality of emergency stop switches on the outside and these switches contact the power line of the internal circuit, so that in case of emergency, the internal circuit is activated by an external contact signal. The purpose is to provide a power control device that has a power cutoff function by an external contact signal that can cut off the power by cutting off the power line.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

In order to solve the above technical problem, a power control device having a power cutoff function by an external contact signal according to an embodiment of the present invention includes an external emergency stop switch including at least one emergency stop switch provided on the outside of the power control device. stop switch; A line-in terminal through which supply power is input to the power control device; A line-out terminal for supplying power applied through the line-in terminal to each external device; A magnetic contactor is connected in series to the power line connecting the line-in terminal and the line-out terminal and turns on and off the contact part of the power line by the electromagnetic force of the internal coil. ); The external emergency stop switch is connected in series to the operation power line connected to the coil of the magnetic contactor, and when an external contact signal is applied to the external emergency stop switch by the user's operation in the event of an emergency, the operation power line connected to the magnetic contactor is It includes an external emergency stop expansion circuit unit that cuts off and turns off the magnetic contactor to cut off the power applied to the line out terminal.

The external emergency stop expansion circuit part has a port connected in series to an operation power line connected to the internal coil of the magnetic contactor, and an expansion contact that connects the external emergency stop switch to the port to enable electrical connection; may include.

The expansion contact is provided to enable expansion of the external emergency stop switch by providing a plurality of ports in block units when a plurality of external emergency stop switches are included.

The external emergency stop switch may include at least one safety door switch mounted on the door of the external case on which the power control device is mounted, or a desk-operated emergency stop switch provided near a work desk for testing equipment. there is.

In addition, the external emergency stop switch is normally closed to apply power, and opens when the user manipulates it to cut off the operation power line connected to the magnetic contactor.

The magnetic contactor includes two main contacts connected in series to two-phase power lines connecting the line-in terminal and the line-out terminal and turned on and off through a switching operation; an auxiliary contact spaced apart from the two main contact points and turned on and off by a switching operation; Includes an operating coil that turns on and off the two main contacts and the auxiliary contact by electromagnetic force generated when a current flows through the coil, wherein the operating coil is one of two power lines whose ends are connected to the terminal of the line. One phase is connected to the power line, and the other end is connected to the power line of the remaining one of the two phase power lines connected to the line terminal through the external emergency stop expansion circuit.

In addition, the magnetic contactor is connected in series with the external emergency stop expansion circuit to the other end of the operating coil, and the power switch of the power control device is connected in series, and power is applied to the operating coil according to the operation of the power switch. The two main contacts and auxiliary contacts can be turned on and off.

In addition, the magnetic contactor may have an internal emergency stop switch connected in series to the other end of the operating coil along with the external emergency stop expansion circuit part.

At this time, the internal emergency stop switch is a B contact switch that operates in the same way as the external emergency stop switch.

According to this embodiment of the present invention, the emergency stop switches provided on the outside are connected to the internal circuit using external contacts, and the power supply circuit is cut off according to the operation of the external emergency stop switch, so that the power is applied. Also, it has the effect of cutting off the power supply going to the line out, making it possible to cut off the power in an emergency. Moreover, according to an embodiment of the present invention, it has the remarkable effect of being able to quickly turn off the power using an external emergency stop switch even in an emergency with no time to spare.

In addition, according to the present invention, a plurality of external emergency stop switches can be provided regardless of the type using an expansion contact, so that operations that were previously operated only with one emergency stop switch can be controlled through a plurality of emergency stop switches. There is.

Figure 1 is a diagram showing a power control device having a power-off function by an external contact signal according to an embodiment of the present invention.
Figures 2 and 3 are diagrams showing the front and rear parts of a power control device having a power cutoff function by an external contact signal according to an embodiment of the present invention.
Figure 4 is a diagram for explaining an operation circuit for implementing a power-off function by an external contact signal according to an embodiment of the present invention.
Figure 5 is an overall circuit diagram of a power control device having a power-off function by an external contact signal according to an embodiment of the present invention.
FIG. 6 is a circuit diagram partially extracted from the circuit diagram of FIG. 5 to explain the operating principle of power supply.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Figure 1 is a diagram showing a power control device having a power-off function by an external contact signal according to an embodiment of the present invention, and Figures 2 and 3 are a diagram showing a power-off function by an external contact signal according to an embodiment of the present invention. The branches are diagrams showing the front and rear parts of the power control device.

First, referring to FIG. 1, the power control device 100 according to an embodiment of the present invention can be installed together with other equipment and integrated into one system module.

The power control device 100 may be mounted and stored in an external case or an external frame as shown in FIG. 1 . In this case, a door made of glass or plastic may be installed on the exterior case or exterior frame, and emergency stop switches may be provided on the outside of the exterior case or frame to respond to an emergency. Emergency stop switches provided on the outside like this are collectively referred to as external emergency stop switches.

The external emergency stop switch may include switches for various purposes.

For example, the external emergency stop switch may include a safety door switch 200 and a desk-operated emergency stop switch 300, as shown in FIG. 1 .

At this time, the external emergency stop switch may include at least one of these, for example, one each of the safety door switch 200 and the desk-operated emergency maintenance switch 300, or two switches 200 and 300. It can only contain one of the following. Alternatively, it may include only two or more desk-operated emergency stop switches 300. Alternatively, any emergency switch that switches with the same operation as the two switches may be additionally included regardless of its type.

The safety door switch 200 is installed on the door of the exterior case or exterior frame on which the power control device 100 is mounted. The safety door switch 200 is used to cut off the internal power the moment the door is opened to prevent safety accidents, as people may be electrocuted by live parts when the door is opened while the equipment power is not turned off. .

The desk-operated emergency stop switch 300 is provided in a location where the user can easily operate it, especially near the work desk where equipment is tested, and is applied to cut off the power even at a distance from the power control device 100 in the event of an emergency. .

Here, the safety door switch 200 and the desk-operated emergency stop switch 300 differ only in their installation positions, and operate for the same purpose of turning off the power in the event of an emergency or in a situation to prevent a safety accident. Its specific operation method will be described in detail in FIGS. 4 to 6 below.

Looking at the appearance of the power control device 100 with reference to FIGS. 2 and 3, the front part 110 of the power control device 100 includes a power switch 111 and an earth leakage breaker switch (ELCB) as shown in FIG. 2. ; It may include an Earth Leakage Circuit Breaker (112), an overload breaker switch (MCCB; Molded Case Circuit Breaker) (113), and an emergency stop switch (114).

The power switch 111 is a switch button for turning on and off the entire operation of the power control device 100. The earth leakage breaker switch 112 is a switch button to detect leakage current and block the circuit when a leak occurs in a circuit or device, and the overload breaker switch 113 is a switch button to prevent circuit damage when an overcurrent or short-circuit current occurs. This is a switch button to block. The emergency stop switch 114 is a switch button for immediately cutting off power in an emergency, and unlike an external emergency stop switch, it is fixedly installed within the power control device 100. In this embodiment, it is referred to as an internal emergency stop switch.

As such, the front part 110 of the power control device 100 is generally provided with cut-off switches to protect the power supply circuit to facilitate user operation.

As shown in FIG. 3, the rear part 120 of the power control device 100 has a terminal 121, which is a line connected to an external supply source and receiving power, and a cable of the equipment to supply power to each external equipment. It may include a line out terminal 122 connected to this and a meter 123 that measures the amount of power.

The operation circuit of the power control device 100 configured in this way is configured as follows.

Figure 4 is a diagram showing an operation circuit for implementing a power cut-off function by an external contact signal according to an embodiment of the present invention, Figure 5 is an overall circuit diagram of the power control device according to an embodiment of the present invention, and Figure 6 is a This is a circuit diagram partially extracted from the circuit diagram of FIG. 5 to explain the operating principle of power supply.

In the circuit of FIG. 5, basically, the power control device 100 supplies a line-in terminal 121 through which power is input, and power applied through the line-in terminal 121 to each external device. The line-out terminal 122 is electrically connected, and an earth leakage breaker switch 112, an overload breaker switch 113, and a magnetic contact (MC) are installed on the power line connecting them. (140) are connected in series. And, the meter 123 is connected in parallel to the power line connecting the line-in terminal 121 and the line-out terminal 122.

In addition, the power on switch part 111b and the power off switch part 111a, which are the power switch 111, the B contact part of the internal emergency stop switch 114, and the external emergency stop expansion circuit part 130 are magnetic contactors 140. It is arranged in series on the line connected to the coil (hereinafter referred to as the operating power line). That is, it is connected in series to the operation power line connected to the operation coil (terminal 142 A1 in FIG. 6) in the magnetic contactor 140.

Here, the earth leakage breaker switch 112 and the overload breaker 113 serve to turn off power lines connected in series by physically turning them on and off by the user's switching operation. That is, when the earth leakage breaker switch 112 or the overload breaker 113 is operated, both terminals 1 and 2 of the line-in are turned off to cut off the power applied from the line-in.

The magnetic contactor 140 is connected in series to the power line connecting the line-in terminal 121 and the line-out terminal 122 and serves to turn on and off the contact part of the power line by the electromagnetic force of the operating coil. Specifically, the magnetic contactor 140 consists of two main contact points 141, an auxiliary contact point 143, and an operating coil 142, as shown in FIG. 6. The operating coil (142 in FIG. 6) When power is applied, the two main contacts 141 and the auxiliary contact 143 are turned on and off by electromagnetic force generated from the current flowing in the operating coil 142.

In order to apply power to the manipulation coil 142, this magnetic contactor 140 is connected to the power line of one of the two-phase power lines connected to the terminal 121, where the A2 terminal of the manipulation coil 142 is the line. , A1 terminal is the other one of the two-phase power lines connected to the line-in terminal 121 via the external emergency stop expansion circuit part 130, the B contact part of the internal emergency stop switch 114, and the power off switch part 111a. Connected to the power line. At this time, the line connected to the manipulation coil 142, especially the A1 terminal, is called the manipulation power line.

And, the two main contact points 141 are connected in series to the two-phase power lines connecting the line-in terminal 121 and the line-out terminal 122, respectively, and are turned on and off by the operating coil 142.

The auxiliary contact 143 is spaced apart from the two main contacts 141 and is turned on and off by the operating coil 142, which is connected in parallel with the power on switch unit 111b of the power switch 111.

Looking at the operating principle of the magnetic contactor 140 configured in this way, the moment the green start button of the power switch 111 shown in FIG. 6 is operated, the power on switch unit 111b is turned on, and the line-in terminal 121 The applied power flows to the A1 terminal of the operating coil 142 through the power on switch unit 111b, the power off switch unit 111a, the internal emergency stop switch 114, and the external emergency stop expansion circuit unit 130. At this time, the A2 terminal of the manipulation coil 142 is connected to the power line of the line-in terminal and is supplied with power at all times, so when the user presses the green start button, power is applied to A1-A2 of the manipulation coil 142. Accordingly, both the two main contacts 141 and the auxiliary contacts 143 are switched to the closed state, and eventually the power coming through the line-in terminal 121 flows to the line-out terminal 122 through the magnetic contactor 140. This results in distribution and supply of power.

However, the general power switch 111 uses a push button that turns on the moment the user presses it and turns off when the user stops touching (releases). In this case, even if the power on switch 111b is turned off, the auxiliary contact 143 remains on. Since it is maintained in the closed state, power is still applied to the operating coil 142. Therefore, even if the user releases the green start button, power is supplied through the power line.

This operation flow refers to the direction indicated by the arrow in FIG. 6.

Meanwhile, in the embodiment of the present invention, the operation of the magnetic contactor 140 is always performed by the power-off switch unit 111a, the internal emergency stop switch 114, and the external emergency stop expansion circuit unit 130 connected to the magnetic contactor 140. This will be possible assuming it is closed.

For this purpose, the external emergency stop switch of the power-off switch unit 111a, the internal emergency stop switch 114, and the external emergency stop expansion circuit unit 130 are normally closed to apply power, and open when operated by the user to It is characterized by operating in a B contact method that cuts off the operating power line connected to the contactor 140.

The external emergency stop expansion circuit unit 130 connects the external emergency stop switch described above, that is, the safety door switch 220 and the desk-operated emergency stop switch 320, in series to the operation power line connected to the coil of the magnetic contactor 140. By connecting to , the operation power line connected to the magnetic contactor 140 is cut-off by an external contact signal applied according to the operation of these switches 220 and 320. Through this, the external emergency stop expansion circuit unit 130 turns off the magnetic contactor 140 to block the power applied to the line out terminal 122.

For this purpose, the external emergency stop expansion circuit unit 130 has a port connected in series to the operation power line connected to the magnetic contactor 140, and the safety door switch 220 and the desk operation type emergency stop switch 320 are connected to this port. ) may include an expansion contact 131 that connects to enable electrical connection.

Simply put, the expansion contact 131 according to this embodiment collects and electrically connects a plurality of external emergency stop switches, that is, the safety door switch 220 and the desk-operated emergency stop switch 320.

As such, when a plurality of external emergency stop switches are included, the expansion contact 131 is provided with a plurality of ports in block units to enable expansion by connecting various types of external emergency stop switches to the ports. For example, the expansion contact 131 can be a panel-piercing terminal block. With this configuration, the power control device according to an embodiment of the present invention can be equipped with a plurality of external emergency stop switches regardless of their type, Operations that were previously controlled with only one emergency stop switch can now be controlled through multiple emergency stop switches.

The external emergency stop expansion circuit unit 130 is in contact with the safety door switch 220 and the desk-operated emergency stop switch 320 in a closed state in normal times when the external emergency stop switch is not operated, as described above. Likewise, when the power switch 111 is turned on, the magnetic contactor 140 is brought into contact with the power line and power flows. In this state, when the safety door switch 220 or the desk-operated emergency stop switch 320 is operated, the B contact of the switch, which is closed, is opened by the external contact signal input by the operation, and through this, the operating coil is opened. Cut-off the operation power line entering (142).

As such, the power control device 100 according to an embodiment of the present invention is provided with a plurality of external emergency stop switches on the outside and uses an external emergency stop expansion circuit unit 130 to cut off the magnetic contactor 140 by operating the switches. There is a major technical feature in the configuration of connecting in series with a B contact type switch.

Another reason is that the external emergency stop switch is provided as a contact point B. Normally, the circuit is kept in a closed state (Normal Close; NC), but the contact point drops due to a contact signal generated when there is a user's operation or an abnormality occurs, thereby closing the circuit. This is because by opening it, abnormal operations can be easily confirmed. Contrary to contact B, contact A is a contact that is normally disconnected from the circuit and attaches when a signal is present. However, since the contact is disconnected even if there is a problem in the circuit, it is difficult to determine whether the circuit operation is normal or abnormal as it is unclear.

Above, in the specification, only emergency stop switches that have a B contact point, such as safety door switches and desk-operated emergency stop switches, are mentioned as external emergency stop switches, but they can be extended and connected to sensors that have a B contact point. For example, a proximity sensor can be applied to switch contact B to open when a person approaches a random device, or a temperature sensor can be applied to cut off power by switching contact B to open when a certain temperature is reached. In this case, the circuit can be easily implemented by connecting a proximity sensor or temperature sensor to the expansion contact 131.

The features, structures, effects, etc. described in the present inventions above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description has been made focusing on the examples, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiment. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

100: power control device
200: Safety door switch
300: Task-operated emergency stop switch
110; front 111; power switch
112; earth leakage circuit breaker switch 113; Overload breaker switch
114; Emergency stop switch 111b; Power on switch part
111a; Power off switch unit 120; rear part
121; Line-in terminal 122; Line out terminal
123;Meter 130; Emergency stop expansion circuit
131; extended contacts

Claims (9)

As a power control device,
an external emergency stop switch including at least one emergency stop switch provided outside the power control device;
A line-in terminal through which supply power is input to the power control device;
A line-out terminal for supplying power applied through the line-in terminal to each external device;
A magnetic contactor is connected in series to the power line connecting the line-in terminal and the line-out terminal and turns on and off the contact part of the power line by the electromagnetic force of the internal coil. );
The external emergency stop switch is connected in series to the operating power line connected to the coil of the magnetic contactor, and when an external contact signal is applied to the external emergency stop switch by the user's operation in an emergency, the operating power line connected to the magnetic contactor an external emergency stop expansion circuit unit that cuts off and turns off the magnetic contactor thereby blocking the power applied to the line out terminal;
A power control device having a power-off function by an external contact signal, including a.
According to paragraph 1,
The external emergency stop expansion circuit unit,
an expansion contact having a port connected in series to an operating power line connected to the internal coil of the magnetic contactor, and enabling electrical connection by connecting the external emergency stop switch to the port;
A power control device having a power-off function by an external contact signal, characterized in that it includes.
According to paragraph 2,
The extended contact is,
When a plurality of external emergency stop switches are included, a power control having a power cutoff function by an external contact signal is provided to enable expansion of the external emergency stop switch by providing a plurality of ports in block units. Device.
According to paragraph 1,
The external emergency stop switch is,
By an external contact signal, comprising at least one safety door switch mounted on the door of the external case on which the power control device is mounted, or a desk-operated emergency stop switch provided near a work desk for testing the equipment. A power control device with a power-off function.
According to claim 1 or 4,
The external emergency stop switch is,
Characterized in that it operates in the B contact method, which is normally closed to apply power, and opens when the user manipulates it to cut off the operation power line connected to the magnetic contactor, and the power is cut off by an external contact signal. A power control device with functions.
According to paragraph 1,
The magnetic contactor,
Two main contacts connected in series to two-phase power lines connecting the line-in terminal and the line-out terminal and turned on and off through a switching operation;
an auxiliary contact spaced apart from the two main contact points and turned on and off by a switching operation;
Includes an operating coil that turns on and off the two main contacts and auxiliary contacts by electromagnetic force generated when a current flows through the coil,
The operating coil has one end connected to a power line of one of two power lines connected to the line terminal, and the other end of which is connected to the power line of one of two phases connected to the line terminal via the external emergency stop expansion circuit part. A power control device having a power cutoff function by an external contact signal, characterized in that it is connected to an upper power line.
According to clause 6,
The magnetic contactor,
The power switch of the power control device is connected in series with the external emergency stop expansion circuit to the other end of the operation coil,
A power control device having a power cutoff function by an external contact signal, characterized in that power is applied to the manipulation coil according to the operation of the power switch and the two main contact points and the auxiliary contact point are turned on and off.
According to clause 6,
The magnetic contactor,
A power control device having a power cutoff function by an external contact signal, characterized in that an internal emergency stop switch is additionally connected in series with the external emergency stop expansion circuit unit at the other end of the operating coil.
According to clause 8,
The internal emergency stop switch is,
A power control device having a power cutoff function by an external contact signal, characterized in that it is a B contact switch that operates in the same manner as the external emergency stop switch.