KR102192729B1 - DC power supply having load protection and method for controlling the DC power supply - Google Patents

Abstract

The present invention relates to a direct current (DC) power supply device having a load protection function and a control method thereof so that when various error situations such as overvoltage, overcurrent, and the like occur in a load target or the DC power supply device itself, a quick response is performed to safely protect the load target as much as possible. More specifically, the present invention provides a DC power supply device having a load protection function which can perform an immediate response of a μs level to the various error situations by using a protection control unit which is further provided between a power supply unit and the load target and is equipped with a high-speed switching control unit, and a control method thereof.

Description

DC power supply having load protection and method for controlling the DC power supply

The present invention relates to a DC power supply device having a load protection function and a control method thereof, and more particularly, when various error conditions such as overvoltage and overcurrent occur in a load target or the DC power supply device itself, It relates to a DC power supply device having a function of protecting the object as safely as possible and a control method thereof.

The power supply serves to supply power to the load target, and is supplied to the load when an error condition that may cause damage to the load target occurs, such as over voltage and over current. It is often equipped with a load protection function that cuts off the power to be generated. For example, Korean Patent Registration No. 1682471 ("Earth leakage blocking device using a power factor limit and a recording medium in which a method and a program for performing the method is recorded", 2016.11.29.) of the voltage by detecting the waveform of the AC power supply voltage. Disclosed is a technology related to an earth leakage blocking device and method in a power supply device, which is configured to supply DC power only in a phase angle range set before and after a peak point.

Although the structure is very complex and requires high cost, such as a satellite, when the load target is a device that is produced only in a very small amount, damage to the load target due to overvoltage, overcurrent, etc. causes great economic loss. Ideally, the input voltage range has already been determined at the time of designing and manufacturing the electronic device, and therefore it can be seen that it is already known how much current will flow within that range. However, in practice, a voltage that exceeds the allowable input voltage range of the device may be applied by mistake, although not intended by the user, and the voltage applied to the device as a part of the device is damaged or malfunctions due to problems such as durability, defect, etc. Current may not form as designed. In other words, even if ideally designed and manufactured correctly, there is always a risk of problems such as overvoltage, overcurrent, and undervoltage (sudden power failure) due to unexpected causes or mistakes during actual operation.

To solve this problem, the power supply must be able to recognize and respond to various error situations as quickly as possible. In the case of the power supply device provided in the satellite, which is a representative high-cost and very small production load, as described above, there are reports that overseas research is being conducted on its own to solve the above-described problems, but has not yet been studied in depth in Korea. Actually.

1. Korean Patent Registration No.1682471 ("A device for preventing an electric leakage using a power factor limit, and a recording medium in which the method and a program performing the method are recorded", 2016.11.29.)

Accordingly, the present invention was devised to solve the problems of the prior art as described above, and an object of the present invention is to quickly cope with various error situations such as overvoltage, overcurrent, etc. in the load target or the DC power supply device itself. Thus, it is intended to provide a DC power supply device having a load protection function and a control method therefor so that the load object can be protected as safely as possible. More specifically, DC power with load protection function capable of performing an immediate response of μs level to various error situations by using a protection control unit that is further provided between the power supply unit and the load target and has a built-in high-speed switching control unit. It is to provide a supply device and a control method thereof.

The DC power supply device 1000 having a load protection function of the present invention for achieving the above object is DC power supplying DC power to the load object 500 including at least one load unit 520 In the supply device 1000, a power output unit 110 for outputting power, provided on an electrical connection between the power output unit 110 and the load target 500 and supplied to the load target 500 A remote monitoring unit 120 for monitoring the state of power, and an external error input unit 130 for stopping the power supply of the power output unit 110 by receiving an error condition generated in the load target 500 from the outside. A power supply unit 100; The main high-speed switching control unit 211, the remote monitoring unit 120, and the load target 500 are provided on the electrical connection between the power output unit 110 and the load target 500 and perform cut-off when necessary. Between the (+) and (-) on the electrical connection between the supervisory high-speed switching control unit 212, the power output unit 110 and the load target 500, which is provided on the electrical connection between the monitoring and performs interruption when necessary. A power transmission unit 210 including a crowbar unit 213 for stabilizing the voltage to 0V while performing a short circuit when necessary, measured on the electrical connection between the power supply unit 100 and the load target 500 An internal monitoring unit 221 that monitors an error condition expressed as a voltage or current value and transmits it to the external error input unit 130 in case of an error condition, and the electric power between the power supply unit 100 and the load target 500 in case of an error condition. The FPGA unit 220 including an external control output unit 223 for outputting a control signal for blocking the connection, the power transmission unit 210 and the main processing unit connected to the FPGA unit 220 to perform control processing ( 230), a protection control unit 200 including an interface unit 240 for receiving a user input or outputting information to the user; A switch unit 300 provided between the protection control unit 200 and the load target 500 to receive a control signal from the external control output unit 223 to mechanically connect or cut off an electrical connection; A main control unit 400 for controlling the power supply unit 100 and the protection control unit 200; It may include.

In this case, the load target 500 includes a load (+) terminal 511 and a load (-) terminal 512 that receive power from the outside and are connected to the load unit 520 to supply power, The power output unit 110 includes a main (+) terminal 111 connected to the load (+) terminal 511 and a main (-) terminal 112 connected to the load (-) terminal 512. And the electrical connection between the main (+) terminal 111 and the load (+) terminal 511 is referred to as a main (+) line, and the main (-) terminal 112 and the load (-) When the electrical connection between the terminals 512 is referred to as a main (-) line, the remote monitoring unit 120 is a monitoring (+) terminal connected to the rear end of the switch unit 300 on the main (+) line ( 121) and a monitoring (-) terminal 122 connected to a rear end position of the switch unit 300 on the main (-) line, and a rear end of the monitoring (+) terminal 121 and the switch unit 300 The electrical connection between the positions may be referred to as a monitoring (+) line, and the electrical connection between the monitoring (-) terminal 122 and the rear end position of the switch unit 300 may be referred to as a monitoring (-) line.

In addition, the main high-speed switching control unit 211 is provided on the main (+) line, the monitoring high-speed switching control unit 212 is provided on the monitoring (+) line, and the crowbar part 213 is It may be provided between the main (+) line and the main (-) line, and at a front end position of the main high-speed switching control unit 211.

In addition, the switch unit 300 includes a main (+) switch 311 provided on the main (+) line, a main (-) switch 312 provided on the main (-) line, and the monitoring ( It may include a monitoring (+) switch 321 provided on the +) line, and a monitoring (-) switch 322 provided on the monitoring (-) line.

In addition, the power transmission unit 210 may include a shunt unit 214 provided on the main (+) line and at a position after the main high-speed switching control unit 211 to measure a current. At this time, the power transmission unit 210 is provided between the main (+) line and the main (-) line, and at a front end or a rear end of the shunt unit 214 to dissipate power. ) And a bypass load unit 218 may be included.

In addition, the power transmission unit 210 may include a diode unit 215 provided on the main (+) line and at a position after the main high-speed switching control unit 211 to force current flow in one direction.

In addition, the power transfer unit 210 includes a fuse unit 216 provided on the main (+) line and at a front end position of the main high-speed switching control unit 211 to mechanically block the current flow in case of an overcurrent error situation. I can.

In addition, the DC power supply unit 1000, the power supply unit 100, the internal output of the error condition generated in the power supply unit 100 itself to the outside and to stop the power supply of the power output unit 110 An error output unit 140 may be included, and the FPGA unit 210 may include an external monitoring unit 222 for monitoring an error condition transmitted from the internal error output unit 140.

In addition, the FPGA unit 220, when a plurality of the direct current power supply device 1000 is provided in the load target 500, when one direct current power supply device 1000 detects an error condition, the other direct current It may include a protection chain unit 224 for transmitting the error situation to the power supply device 1000.

In addition, the FPGA unit 220, a driving logic unit 225 for storing a driving logic for controlling the power transmission unit 210, a measurement logic for measuring current and voltage in the power transmission unit 210 A measurement logic unit 226 to store, a self-correction logic unit 227 that stores a self-correction logic for correcting errors occurring in the current or voltage measurement in the power transmission unit 210 according to the progress of operation time, power The protection reset unit 228 for initializing the protection control unit 200 after the interruption occurs, the information storage unit 229 for storing programs and data for driving the FPGA unit 220, and the protection control unit 200 itself It further includes at least one selected from a self-test logic unit 22a that stores the self-test logic to check whether it is in a normal state, and an external control input unit 22b that receives a forced signal or user input for power cutoff. I can.

In addition, the control method of the DC power supply device having a load protection function of the present invention, in the control method of the DC power supply device 1000 as described above, the error generation step of generating an error situation; A high-speed blocking step in which the main high-speed switching control unit 211 and the supervisory high-speed switching control unit 212 are blocked; A stable shut-off step in which the voltage of the power transmission unit 210 is stabilized to zero while the crowbar part 213 is short-circuited; A mechanical blocking step in which the switch unit 300 is cut off as a control signal is output from the external control output unit 223; A power cut-off step of stopping power supply of the power output unit 110 by the external error input unit 130 as the internal monitoring unit 221 transmits an error condition; It may include.

In addition, the control method of the DC power supply device, when the DC power supply device 1000 includes the flyback diode unit 217 and the bypass load unit 218, the flyback diode unit 217 A power extinguishing step in which residual power is extinguished by being conducted so that residual power passes through the bypass load unit 218; It may further include.

In addition, in the control method of the DC power supply device, when a plurality of the DC power supply devices 1000 are provided in the load target 500, the remaining error condition is not detected by the protection chain unit 224. An error transmission step of transmitting an error condition to the DC power supply device 1000; It may further include.

In addition, the control method of the DC power supply device includes an overvoltage generated in the load target 500, an overcurrent generated in the load target 500, a low voltage generated in the load target 500, and the power supply unit 100 Alternatively, at least one selected among malfunctions generated by the protection control unit 200 may be detected as an error condition. At this time, when a voltage or current equal to or less than or equal to a predetermined error criterion is generated by the protection control unit 200, it may be determined as an overvoltage, overcurrent, or undervoltage error condition. In addition, a plurality of error criteria may be set in stages, and different error criteria may be applied according to a predetermined situation by the protection control unit 200 to perform blocking.

In addition, the control method of the DC power supply device may be configured to store voltage or current information for a predetermined interval before and after an error condition occurs by the protection control unit 200.

According to the present invention, when various error conditions such as overvoltage, overcurrent, etc. occur in the load target or the DC power supply device itself, there is a great effect of quickly coping with and protecting the load target as much as possible. More specifically, by using the protection control unit that is further provided between the power supply unit and the load target and has a built-in high-speed switching control unit, it performs an immediate response at the level of μs to various error situations. By stopping the power supply, there is an effect of preventing damage to the load target as much as possible.

In particular, according to the present invention, when a device such as a satellite, etc., which is very complex in structure and requires high cost, but only a very small amount is produced is a load target, it is unlikely to be expected at the time of design or manufacture due to unexpected causes or mistakes during general testing. When there is a risk of damage to the load object, there is an effect that allows flexible testing while minimizing the risk of damage to the load object. In particular, there is an effect that enables flexible coping without problems even when the load target is constantly changed, the number of units installed in the load target increases according to the progress of the project schedule, and the load target itself is modified or changed.

In addition, in view of the above-described effects, the apparatus and method of the present invention also has the advantage that it can be very effectively utilized not only for satellites, but also for the production of high-tech equipment or laboratory equipment, etc., in which high-cost and very small production is performed.

1 is an embodiment of a DC power supply device of the present invention.
2 is a measured physical quantity in one embodiment of the DC power supply device of the present invention.

Hereinafter, a DC power supply apparatus having a load protection function according to the present invention having the above-described configuration and a control method thereof will be described in detail with reference to the accompanying drawings.

[1] DC power supply device of the present invention

1-1. Description of the load target and the purpose of development of the DC power supply device of the present invention

The load target 500 provided with the DC power supply device 1000 of the present invention will be described first. The load target 500 is basically a system including at least one load unit 520, so that power can be easily supplied and smoothly distributed to the various load units 520 from the outside. And a load (+) terminal 511 and a load (-) terminal 512 that receive power and are connected to the load unit 520 to supply power.

As described above, the load target 500 may be a complex system such as a satellite. For example, when the load unit 500 is a satellite, the load unit 520 receives the power output from the battery or solar panel of the satellite and consumes power from the power control device and the power distribution device. The computer unit, which is the main control device for operating the satellite, is equipped with the control or monitoring software of the satellite, various satellite communication units for communication between the satellite in space orbit and the earth station on the ground, the sensing & control unit to control the internal temperature or attitude of the satellite, and the satellite mission It may be a mounting device unit including devices to be mounted according to the.

However, when testing the performance of the satellite, all of these load units 520 are not completely manufactured and installed in a state. Practically, there is always a possibility that the desired performance may not be exhibited due to an unexpected error in the design or manufacture of a certain load unit 520. Therefore, when re-installing, time and economic losses are very large. Therefore, the performance test is made continuously while manufacturing is in progress. On the other hand, the performance test of a satellite is most basically performed on the ground. In the case of a satellite operating with a solar panel, the environment in which the performance test is performed is not possible, such as that it cannot receive as much solar energy as it can receive from space orbit. There are limitations that arise because it is different from the operating environment. In this case, it is necessary to perform a performance test by replacing the solar panel with an appropriate simulator. In other words, the performance test may be conducted while replacing the device. In summary, the load target 500 may be a system in which design or manufacture is in progress, that is, a system in which the number or type of the load units 520 is flexibly changed.

Although it will be described in more detail later, since the DC power supply device 1000 of the present invention can quickly perform power cut-off in various error situations, even if the test is performed while variously changing the load unit 520 The test can be carried out boldly so that only minimal damage to the load unit 520 can be achieved. When the load object 500 is a satellite, each of the load units 520 is a very expensive equipment. If the load unit 520 is actually tested while damaging the load unit 520, the economic loss will be enormous. At this time, the DC power supply device 1000 of the present invention can be applied smoothly even when the number or type of the load units 520 is changed flexibly as described above. Therefore, if the DC power supply device 1000 of the present invention is used, damage to the actual load unit 520 may be fundamentally excluded, and even if the test is performed using the actual load unit 520, very high power cut-off is achieved. Because it loses, it can also be dealt with before physical damage occurs.

The DC power supply device 1000 of the present invention was developed to the same effect as described above. FIG. 1 shows an embodiment of the DC power supply device of the present invention, and FIG. 2 specifically shows a measurement position of a physical quantity, that is, voltage, current, etc. measured in the embodiment of FIG. 1. The DC power supply device 1000 of the present invention is a device that supplies DC power to a load object 500 basically. As shown in FIG. 1, the DC power supply device 1000 of the present invention largely includes a power supply unit 100, a protection control unit 200, a switch unit 300, and a main control unit 400. The power supply unit 100 is a part that actually supplies power, and the switch part 300 includes an actual switch to mechanically connect or cut off an electrical connection. These two parts are also used in the existing power supply device. This is basically included. In this case, in the present invention, by using the protection control unit 200 to carefully monitor error situations occurring in the load target 500 while power is supplied, and respond quickly when an error situation occurs, the load target 500 Minimizes the risk of damage.

Hereinafter, each part will be described in more detail, but first, the power supply unit 100 and the switch unit 300, which are parts that may be partially similar to the existing power supply devices, and which have a relatively simple configuration, will be described, and then The protection control unit 200, which is an essential part of the DC power supply device 1000 of the present invention, will be described in detail.

1-2. Detailed configuration of each of the power supply unit, switch unit, and main control unit

As described above, the power supply unit 100 is a part that actually supplies power, so to speak, it can be seen that the conventional power supply device is similar to that of the power supply unit 100 alone. Of course, in the present invention, the power supply unit 100 itself is somewhat different from the conventional power supply device in that a module for monitoring an error condition is embedded. The power supply unit 110 basically includes a power output unit 110, a remote monitoring unit 120, an external error input unit 130, and may additionally further include an internal error output unit 140.

The power output unit 110 serves the most basic role of the DC power supply device 1000, that is, outputs power. The power output unit 110 includes a main (+) terminal 111 connected to the load (+) terminal 511 and a main (-) terminal 112 connected to the load (-) terminal 512. Include. In order to simplify the description hereinafter, the electrical connection between the main (+) terminal 111 and the load (+) terminal 511 is referred to as a main (+) line, and the main (-) terminal 112 And the electrical connection between the load (-) terminal 512 is referred to as a main (-) line.

The remote monitoring unit 120 is provided on an electrical connection between the power output unit 110 and the load object 500 and serves to monitor the state of the power supplied to the load object 500. The remote monitoring unit 120 includes a monitoring (+) terminal 121 connected to a rear end position of the switch unit 300 on the main (+) line and a rear end position of the switch unit 300 on the main (-) line It includes a monitoring (-) terminal 122 connected to. Also, in order to simplify the description later, the electrical connection between the monitoring (+) terminal 121 and the rear end position of the switch unit 300 is referred to as a monitoring (+) line, and the monitoring (-) terminal 122 And the electrical connection between the position of the rear end of the switch unit 300 is referred to as a monitoring (-) line.

The external error input unit 130 serves to stop the power supply of the power output unit 110 by receiving an error condition generated in the load target 500 from the outside. As will be described in more detail later, the'external' that transmits the error situation to the external error input unit 130 is the protection control unit 200, and the overcurrent to the load target 500 while power is supplied from the protection control unit 200, When it detects that an error condition such as overvoltage or undervoltage has occurred, a control signal is sent to the external error input unit 130 to stop power supply, and the external error input unit 130 receives this control signal and receives the control signal. 110) will stop the power supply.

The internal error output unit 140, which may be additionally provided as described above, outputs an error condition generated in the power supply unit 100 itself to the outside and supplies power to the power output unit 110 It serves to stop. As will also be described later in more detail, the'external' to which the internal error output unit 140 outputs an error condition is also the protection control unit 200. That is, the protection control unit 200 detects not only overvoltage, overcurrent, undervoltage, etc. generated in the load target 500 but also malfunctions occurring in the DC power supply device 1000 itself as an error condition, and cuts off the power supply. By doing so, the risk of damage that may occur during power supply can be significantly reduced.

The switch unit 300 is provided between the protection control unit 200 and the load object 500, and the protection control unit 200 (which will be described in detail later, but more clearly, the external inside the protection control unit 200). It receives a control signal from the control output unit 223 and mechanically connects or blocks an electrical connection. Even if it is not the switch unit 300, there are several parts that block power supply inside the protection control unit 200 to be described later, but even if the power supply is cut off, there is a problem that residual power may remain in the circuit for some time. In particular, it is safest and most reliable to provide mechanical insulation when using a large current. The switch unit 300 is provided for this reason.

In order to perform more reliable power cut-off, the switch unit 300 may be formed in a form in which a switch is formed in each of the four power supply lines described above. That is, as shown in FIG. 1, the switch unit 300 includes a main (+) switch 311 provided on the main (+) line, and a main (-) switch provided on the main (-) line. It may include a switch 312, a monitoring (+) switch 321 provided on the monitoring (+) line, and a monitoring (-) switch 322 provided on the monitoring (-) line.

The main control unit 400 serves to control the power supply unit 100 and the protection control unit 200, that is to say, performs integrated control, processing, analysis, and the like.

For example, as will be described in more detail later, the DC power supply device 1000 of the present invention may be provided with a plurality of the load target 500. Of course, although each of the DC power supply devices 1000 has built-in modules that can communicate with each other and perform linkage control, a subject who manages them as a whole may be required, and the main control unit 400 performs such a role. can do.

In addition, as described above, the DC power supply device 1000 of the present invention can use a very complex system such as a satellite as the load target 500, and in particular, it can be used for performance tests at various points in the design and manufacturing process. have. During the performance test, various measurement data is stored and classified, and variously processed and analyzed. Also, the main control unit 400 may perform such a role.

Of course, in addition to the above-described examples, the main control unit 400 may perform such a role when the power supply unit 100 and the protection control unit 200 perform control processing on their own and when integrated control processing is required.

1-2. Protection control unit: Overall configuration of protection control unit, detailed configuration of power transmission unit

The protection control unit 200 is the most central part of the DC power supply device 1000 of the present invention, and is a part in which control is performed so as to detect various error situations and quickly cut off power supply. The protection control unit 200 includes a power transmission unit 210 made of hardware that actually cuts off power, an FPGA unit 220 including various software for performing power cut off, the power transmission unit 210 and the FPGA. It includes a main processing unit 230 connected to the unit 220 to perform control processing, and an interface unit 240 for receiving user input or outputting information to a user, such as a touch screen, a keyboard, and a mouse.

Hereinafter, the power transmission unit 210 comprising main hardware of the protection control unit 200 will be described in detail. As shown, the power transmission unit 210 may basically include a main high-speed switching control unit 211, a supervisory high-speed switching control unit 212, and a crowbar unit 213, and additionally, the shunt unit 214 , A diode unit 215, a fuse unit 216, a flyback diode unit 217, and a bypass load unit 218 may be further included.

The main high-speed switching control unit 211 is provided on an electrical connection between the power output unit 110 and the load target 500 and serves to cut off when necessary. More specifically, the main high-speed switching control unit 211 is provided on the main (+) line. The main high-speed switching control unit 211 may be implemented as a MOSFET, and thus, very fast switching to the level of μs is possible.

The supervisory high speed switching control unit 212 is provided on an electrical connection between the remote supervisor 120 and the load target 500 and serves to cut off when necessary. More specifically, the monitoring high-speed switching control unit 212 is provided on the monitoring (+) line. Like the main high-speed switching control unit 211, the supervisory high-speed switching control unit 212 may be implemented as a MOSFET.

The crowbar part 213 is provided between the (+) and (-) on the electrical connection between the power output part 110 and the load object 500 to perform a short circuit and stabilize the voltage to 0V when necessary. It plays a role to let. More specifically, the crowbar part 213 is provided between the main (+) line and the main (-) line, and at a front end position of the main high-speed switching control part 211. A specific configuration of a crowbar circuit for stabilizing the voltage inside the circuit to 0V at the same time as a short circuit is a known technology, and a detailed description thereof will be omitted here. In addition, since the crowbar part 213 is also a switching device that operates at high speed, it may be implemented including a MOSFET, similar to the main high speed switching control unit 211 or the supervisory high speed switching control unit 212, and may be implemented as a silicon controlled rectifier (SCR). Silicon rectifying device) may be included.

The shunt unit 214 is provided on the main (+) line and at a position at a rear end of the main high-speed switching control unit 211 to measure current. The actual current can be read by using the voltage value read from the shunt resistor constituting the shunt unit 214. For correct and smooth measurement, it is desirable to implement a low resistance value, high capacity, and precise resistance. Do. At this time, between the main (+) line and the main (-) line, and at a position of the front end or the rear end of the shunt part 214, the flyback diode part 217 and the bypass load part 218 are respectively By being provided, it is desirable to quickly dissipate power remaining in the internal circuit when power is cut off.

The diode unit 215 is provided on the main (+) line and at a position at a rear end of the main high-speed switching control unit 211 to force current flow in one direction. In general, a diode is a component that is basically provided in a general electric circuit to prevent reverse current, and thus a more detailed description thereof will be omitted.

The fuse unit 216 is provided on the main (+) line and at a front end position of the main high-speed switching control unit 211 to mechanically block the flow of current in case of an overcurrent error condition. In general, a fuse is a component that is basically provided in a general electric device to prevent overcurrent by melting and breaking when an overcurrent occurs, and thus a more detailed description thereof will be omitted.

The power transmission unit 210 configured as described above is controlled by the FPGA unit 220 to be described below, thereby quickly realizing power cut-off in various error situations. In particular, the first high-speed switching control unit 211 is the first part to cut off. As described above, the main high-speed switching control unit 211 is capable of fast switching at the level of μs. I can. In addition, when power is cut off, the voltage inside the circuit is quickly stabilized to 0V by the crowbar part 213, and remaining in the circuit by the flyback diode part 217 and the bypass load part 218. Power is also rapidly dissipated, ensuring the stability of the device itself even in the event of a sudden power cut.

1-3. Protection control unit: detailed configuration of the FPGA unit

As described above, the power transmission unit 210 is a part that cuts off and stabilizes power by hardware. In order for the power transmission unit 210 to operate smoothly, control by software such as various logics must be performed, and the FPGA unit 220 is the collection of such software.

Hereinafter, the FPGA unit 220 including major software of the protection control unit 200 will be described in detail. As shown, the FPGA unit 220 may basically include an internal monitoring unit 221 and an external control output unit 223, and additionally, an external monitoring unit 222 and a protection chain unit 224 , Operation logic unit 225, measurement logic unit 226, self-correction logic unit 227, protection reset unit 228, information storage unit 229, self-test logic unit 22a, external control input unit 22b ) May be further included.

The internal monitoring unit 221 monitors an error condition indicated by a voltage or current value measured on an electrical connection between the power supply unit 100 and the load object 500, and the external error input unit 130 in case of an error condition It serves to deliver. Whether or not an error condition occurs in the load target 500 can be detected through a voltage or current value measured on the circuit forming the power transmission unit 210, so the'internal' here is the protection It can be considered to mean the inside of the control unit 200. On the other hand, in the power supply unit 100 side, the protection control unit 200 is referred to as'external', and an error condition generated in the power supply unit 100 itself is output to the outside, and power is supplied from the power output unit 110 It has been described that an internal error output unit 140 for stopping the operation may be further provided. 'External' in the position of the power supply unit 100 means the protection control unit 200, and thus the protection control unit 200 includes the external monitoring for monitoring an error condition transmitted from the internal error output unit 140 A portion 222 may be further provided.

The external control output unit 223 serves to output a control signal for blocking an electrical connection between the power supply unit 100 and the load target 500 in case of an error situation. As described above with respect to the switch unit 300, the control signal output from the external control output unit 223 operates the switch unit 300, that is, the external control output unit 223 is surely cut off power. Mechanical shut-off for At this time, the external control output unit 223 blocks the switch unit 300 when an error condition is detected by the internal monitoring unit 221 or the external monitoring unit 222 described above.

The protection chain unit 224 is operated when a plurality of the DC power supply devices 1000 are provided on the load target 500, and detects an error condition in one DC power supply device 1000. In this case, it serves to transmit an error situation to the other DC power supply device 1000. That is, even if only one of the several DC power supply devices 1000 detects an error situation, the load target 500 can be more safely protected by immediately cutting off power from all DC power supply devices 1000.

The driving logic unit 225 serves to store a driving logic for controlling the power transmission unit 210. The driving logic stored in the driving logic unit 225 controls switching elements (main high-speed switching control unit, supervisory high-speed switching control unit, crowbar unit, bypass load unit, etc.) included in the power transmission unit 210. Logic, logic for controlling driving of the power transmission unit 210 by interworking with other parts of the FPGA unit 220 are included.

The measurement logic unit 226 serves to store measurement logic for measuring current and voltage in the power transmission unit 210. Specifically, in the measurement logic unit 226, a current value (I in FIG. 2) is measured by the shunt unit 214, and a main (+) position between the switch unit 300 and the load target 500 The voltage value between the line and the main (-) line (V3 in FIG. 2) may be measured. In addition, in order to analyze the state of the power transmission unit 210, the measurement logic unit 226 may further measure the voltage values (V1, V2 in FIG. 2) at the front and rear ends of the main high-speed switching control unit 211. have.

The self-correcting logic unit 227 serves to store a self-correcting logic for correcting an error occurring in the current or voltage measurement in the power transmission unit 210 as the operation time progresses. The measurement logic unit 226 described above measures analog voltage and current values, and in order to check whether the correct measured values are being read over time, power is flowed to an actual load and the voltage and current are compared with each other. Or, you need to know the relationship between the measured value and the reference value. In performing such a calibration operation, the calibration operation can be made much smoother and easier if the calibration logic is implemented by designing a reference voltage and the like that have been verified and built in in advance. The self-correcting logic unit 227 is a part in which these logics are stored.

The protection reset unit 228 serves to initialize the protection control unit 200 after power interruption occurs. After the protection control unit 200 cuts off the power, the user performs an operation as a follow-up operation, for example, transferring the data measured by the measurement logic unit 226 to the main control unit 400 and analyzing it. Is done. After this operation is performed, the protection control unit 200 must be quickly converted to an initial state before turning on the entire system again. Of course, this logic is put in the operation logic unit 225 or the measurement logic unit 226 to reset. Although the operation may be performed, the protective reset unit 228 in charge of such a reset operation is provided, so that a more smooth reset operation can be performed. The protection reset unit 228 may perform an operation such as checking and initializing the switching elements in the power transmission unit 210.

The information storage unit 229 serves to store programs and data for driving the FPGA unit 220. It goes without saying that the information storage unit 229 can be used for any operation requiring memory, for example, information such as voltage or current measured by the measurement logic unit 226 may be stored.

The self-test logic unit 22a serves to store a self-test logic that checks whether the protection control unit 200 itself is in a normal state. From the standpoint of the main control unit 400, not only the power supply unit 100 but also the protection control unit 200 must undergo a step of checking whether the hardware is in a state in which the hardware can operate correctly (ie, a normal state) before the test or immediately before driving. The logic for performing this self-test is stored in the self-test logic unit 22a.

The external control input unit 22b serves to receive a forced signal or a user input from the outside for power cut off. For example, even in a situation where no error situation has occurred, the user may want to use a function to temporarily cut off power when the user presses the emergency forced shutoff switch, and the external control input unit 22b serves to receive such a signal. can do.

As described above, in the present invention, when an error condition is detected, the main high-speed switching control unit 211 of the power transmission unit 210 immediately operates (with a reaction speed of μs) to cut off power. In this case, if the amount of power supplied to the load target 500 is not so large, power cut-off can be sufficiently achieved by only blocking at the semiconductor chip level, but if the amount of power is large, considerable power may remain. However, in the present invention, the power cut-off is performed primarily through the semiconductor chip level cutoff, and at the same time, the internal monitoring unit 221 or the external monitoring unit 222 is used to mechanically cut off the power. Allow blocking to be realized.

The mechanical power cutoff will be described in more detail as follows. The external error input unit 130 or the internal error input unit 140 operating in connection with the internal monitoring unit 221 or the external monitoring unit 222 stops the power supply itself from the power supply unit 100 Let it. Explaining in chronological order, when the internal monitoring unit 221 or the external monitoring unit 222 detects an error situation, the external error input unit 130 or the internal error input unit 140 stops the power supply itself. At the same time, the switch unit 300 is mechanically shut off by the external control output unit 223. Since the switch unit 300 is a mechanical device, it cannot cut off power at a rapid reaction speed comparable to that of a semiconductor chip. On the other hand, since it is a mechanical device, it can reliably cut off power by disconnecting the mechanical connection.

As described above, in the present invention, in the case of an error situation, by performing a primary power cut off at the semiconductor chip level at a reaction speed of μs level, and also performing a mechanical power cut off such as stopping power supply and opening a switch, damage to the load target. Before this occurs, it is possible to realize a quick, complete and reliable power cutoff.

[2] Control method of the DC power supply device of the present invention

In [1], the device configuration of the DC power supply device 1000 of the present invention has been described, and in this process, a control method of the DC power supply device 1000 has been described to some extent. However, since the above description was device-centric, it may be difficult to grasp what operation occurs step by step. In [2], a control method of the DC power supply device 1000 will be sequentially described to compensate for this point. The control method of the DC power supply device 1000 of the present invention may basically include an error generation step, a high-speed cut-off step, a stable cut-off step, a machine cut-off step, and a power cut-off step.

The error generation step is a step in which an error condition occurs, that is, a step in which a condition for power-off operation of the DC power supply device 1000 of the present invention occurs. Here, the error condition is, as mentioned in the description of the device above, an overvoltage generated in the load target 500, an overcurrent generated in the load target 500, a low voltage generated in the load target 500, and the power This may be a malfunction occurring in the supply unit 100 or the protection control unit 200.

In the high-speed blocking step, the main high-speed switching control unit 211 and the supervisory high-speed switching control unit 212 are blocked. As described above, the main/supervisory high-speed switching control units 211 and 212 are both immediately operated at a reaction speed of μs level. Even if an error condition such as an overvoltage or an overcurrent occurs in the load object 500, the overvoltage and overcurrent conditions must be maintained for a certain amount of time in order for damage to the load object 500 to actually occur. However, since the power is immediately cut off in the high-speed cut-off step, the error situation is not maintained enough to actually cause damage, so that primary protection can be secured.

In the stable shut-off step, the crowbar part 213 is short-circuited and the voltage of the power transmission part 210 is stabilized to zero. If the load target 500 has a power enough to cause an error situation, there is a possibility that damage may occur due to an excessive force on the protection control unit 200, and a malfunction may occur in a subsequent operation due to residual power. In order to prevent this risk, the stable shut-off step is performed almost simultaneously with the high-speed shut-off step to stabilize the power transmission unit 210.

In the machine blocking step, the switch unit 300 is cut off as a control signal is output from the external control output unit 223. Since the power cut-off in the high-speed cut-off step is actually cut-off at the semiconductor chip level, the reaction speed is very fast, but a complete power cut-off may not be achieved. On the other hand, since the switch unit 300 is made of a mechanical device, the reaction speed is quite slow, but since the power is cut off by disconnecting the actual mechanical connection, complete and reliable power cut-off can be realized. In practice, the high-speed shut-off step, the stable shut-off step, and the mechanical shut-off step are started almost simultaneously, but the high-speed shut-off step and the stable shut-off step are almost instantaneous (because the operation is performed at the semiconductor chip level). The mechanical shut-off step takes a little more time until the switch is actually opened and realized (because it is an operation performed by the mechanical device actually moving). However, since the power was first cut off in the high-speed cut-off step, the load target 500 does not continue to have an error condition enough to cause damage to the load target 500, and the mechanical cut-off step is realized with a slight time difference, so that the load target ( 500) is completely cut off and the risk of damage can be completely eliminated.

In the power cut-off step, power supply to the power output unit 110 is stopped by the external error input unit 130 as the internal monitoring unit 221 transmits an error condition. The above steps are actually only an operation of disconnecting the electrical connection between the power output unit 110 and the load target 500, and if power is continuously supplied from the power output unit 110, the There remains a risk of electricity flowing to the load target 500 or other devices around it. In order to completely eliminate the risk of electric leakage, the electrical connection between the power output unit 110 and the load target 500 is disconnected by performing the above steps, and then the power supply from the power output unit 110 is stopped. It is to let. In this way, completely safe power cut-off can be achieved.

In addition, the method of controlling the DC power supply device may further include a power dissipation step when the DC power supply device 1000 includes the flyback diode part 217 and the bypass load part 218. have.

In the power dissipation step, the flyback diode unit 217 is conducted so that the residual power passes through the bypass load unit 218 to dissipate the residual power. If the power supplied to the load target 500 is small, the problem of residual power will not be large, but if the power is large, there is a possibility that malfunction or damage to the components may occur within the protection control unit 200 due to the residual power. have. However, as the power dissipation step is performed, this risk can be well removed.

In addition, the method of controlling the DC power supply device may further include an error transmission step when a plurality of the DC power supply devices 1000 are provided in the load target 500.

In the error transmission step, the error situation is transmitted to the other DC power supply device 1000 where the error situation is not detected by the protection chain unit 224. As the error transmission step is performed, as described above, even if only one of the several DC power supply devices 1000 detects an error situation, all DC power supply devices 1000 immediately cut off power, and the load target 500 ) Can be more securely protected.

Meanwhile, in the above control method of the DC power supply device, the overvoltage generated in the load target 500, the overcurrent generated in the load target 500, the low voltage generated in the load target 500, and the power supply unit ( 100) or at least one selected from among the malfunctions generated by the protection control unit 200 may be detected as an error condition. In this case, the protection control unit 200 may determine that it is an overvoltage, overcurrent, or undervoltage error condition when a voltage or current that is equal to or less than or equal to a predetermined error criterion occurs.

However, for example, a large amount of power is suddenly supplied at the first moment of turning on a system that was turned off, which may result in an instantaneous overvoltage or overcurrent condition, although it does not substantially cause component damage. In addition, the load target 500 may include a plurality of the load units 520, and any of the load units 520 may be turned off and turned on as needed. Even in this case, the system Similar to starting the whole, slight overvoltage and overcurrent conditions can occur. In this case, if the DC power supply device 1000 cuts off the power supply just because the overvoltage error criterion has been exceeded, a smooth system or load unit may not be started.

In order to solve this problem, a plurality of error criteria are set step by step, and different error criteria may be applied according to a situation predetermined by the protection control unit 200 to perform blocking.

In addition, it has been described above that the DC power supply device 1000 of the present invention enables various and bold tests of the load target 500 to be performed. In this process, if an event that is considered to be an error situation occurs, it is necessary to analyze the data well around the point in time.

To this end, the control method of the DC power supply device is preferably configured to store voltage or current information for a predetermined interval before and after an error condition occurs by the protection control unit 200. This interval can be appropriately determined in advance according to user needs, purpose, and empirical judgment, such as [3 seconds before / 7 seconds after], [7 seconds before / 3 seconds after], etc., centering on the occurrence of an error condition. have.

The present invention is not limited to the above-described embodiments, and the scope of application thereof is diverse, as well as anyone with ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications are possible.

1000: DC power supply device
100: power supply
110: power output unit
111: main (+) terminal 112: main (-) terminal
120: remote monitoring unit
121: monitoring (+) terminal 122: monitoring (-) terminal
130: external error input unit 140: internal error output unit
200: protection control unit
210: power transmission unit
211: main high-speed switching unit 212: monitoring high-speed switching unit
213: crowbar part 214: shunt part
215: diode part 216: fuse part
217: flyback diode part 218: bypass load part
220: FPGA unit
221: internal monitoring unit 222: external monitoring unit
223: external control output unit 224: protective chain unit
225: driving logic part 226: measuring logic part
227: self-correction logic unit 228: protection reset unit
229: information storage unit 22a: self-test logic unit
22b: external control input unit
230: main processing unit 240: interface unit
300: switch part
311: main (+) switch 312: main (-) switch
321: monitoring (+) switch 322: monitoring (-) switch
400: main control unit
500: load target
511: load (+) terminal 512: load (-) terminal
520: load unit

Claims (18)

In the DC power supply device 1000 for supplying DC power to the load target 500 including at least one load unit 520,
Remote monitoring for monitoring the state of power supplied to the load object 500 by being provided on the electrical connection between the power output unit 110 outputting power, the power output unit 110 and the load object 500 A power supply unit 100 including a unit 120, an external error input unit 130 for receiving an error condition generated in the load object 500 from the outside and stopping the power supply of the power output unit 110;
The main high-speed switching control unit 211, the remote monitoring unit 120, and the load target 500 are provided on the electrical connection between the power output unit 110 and the load target 500 and perform cut-off when necessary. Between the (+) and (-) on the electrical connection between the supervisory high-speed switching control unit 212, the power output unit 110 and the load target 500, which is provided on the electrical connection between the monitoring and performs interruption when necessary. A power transmission unit 210 including a crowbar unit 213 that is provided and stabilizes the voltage to 0V while performing a short circuit when necessary,
An internal monitoring unit 221 that monitors an error condition expressed as a voltage or current value measured on the electrical connection between the power supply unit 100 and the load target 500 and transmits it to the external error input unit 130 in case of an error condition. , FPGA unit 220 including an external control output unit 223 for outputting a control signal for blocking the electrical connection between the power supply unit 100 and the load target 500 in an error situation,
A main processing unit 230 connected to the power transmission unit 210 and the FPGA unit 220 to perform control processing,
Interface unit 240 for receiving user input or outputting information to a user
Protection control unit 200 including a;
A switch unit 300 provided between the protection control unit 200 and the load target 500 to receive a control signal from the external control output unit 223 to mechanically connect or cut off an electrical connection;
A main control unit 400 for controlling the power supply unit 100 and the protection control unit 200;
DC power supply device comprising a.
The method of claim 1,
The load target 500 includes a load (+) terminal 511 and a load (-) terminal 512 that receive power from the outside and are connected to the load unit 520 to supply power,
The power output unit 110 includes a main (+) terminal 111 connected to the load (+) terminal 511 and a main (-) terminal 112 connected to the load (-) terminal 512. Includes,
The electrical connection between the main (+) terminal 111 and the load (+) terminal 511 is referred to as a main (+) line, and the main (-) terminal 112 and the load (-) terminal 512 When the electrical connection between) is called the main (-) line,
The remote monitoring unit 120 includes a monitoring (+) terminal 121 connected to a rear end position of the switch unit 300 on the main (+) line and a rear end position of the switch unit 300 on the main (-) line It includes a monitoring (-) terminal 122 connected to,
The electrical connection between the monitoring (+) terminal 121 and the rear end position of the switch unit 300 is referred to as a monitoring (+) line, and between the monitoring (-) terminal 122 and the rear end position of the switch unit 300 DC power supply device, characterized in that the electrical connection of the monitoring (-) line.
The method of claim 2,
The main high-speed switching control unit 211 is provided on the main (+) line,
The monitoring high-speed switching control unit 212 is provided on the monitoring (+) line,
The crowbar part (213) is a direct current power supply device, characterized in that provided between the main (+) line and the main (-) line and at a front end position of the main high-speed switching control part (211).
The method of claim 2, wherein the switch unit 300,
The main (+) switch 311 provided on the main (+) line, the main (-) switch 312 provided on the main (-) line, the monitoring provided on the monitoring (+) line ( +) switch (321), a DC power supply device, characterized in that it comprises a monitoring (-) switch (322) provided on the monitoring (-) line.
The method of claim 2, wherein the power transmission unit 210,
And a shunt unit (214) provided on the main (+) line and at a rear end of the main high-speed switching control unit (211) to measure current.
The method of claim 5, wherein the power transmission unit 210,
Includes a flyback diode part 217 and a bypass load part 218 provided between the main (+) line and the main (-) line and at the front or rear end of the shunt part 214 to dissipate power DC power supply device, characterized in that.
The method of claim 2, wherein the power transmission unit 210,
And a diode unit (215) provided on the main (+) line and at a rear end position of the main high-speed switching control unit (211) to force current flow in one direction.
The method of claim 2, wherein the power transmission unit 210,
A fuse unit 216 provided on the main (+) line and at a front end position of the main high-speed switching control unit 211 to mechanically block the current flow in case of an overcurrent error situation
DC power supply device comprising a.
The method of claim 1, wherein the DC power supply device (1000),
The power supply unit 100 includes an internal error output unit 140 that outputs an error condition generated in the power supply unit 100 itself to the outside and stops the power supply of the power output unit 110,
The FPGA unit 220, a DC power supply device, characterized in that it comprises an external monitoring unit (222) for monitoring the error condition transmitted from the internal error output unit (140).
The method of claim 1, wherein the FPGA unit 220,
When a plurality of DC power supply devices 1000 are provided in the load target 500,
When one DC power supply device 1000 detects an error situation, the DC power supply device, characterized in that it comprises a protection chain unit 224 for transmitting the error situation to the other DC power supply device (1000).
The method of claim 1, wherein the FPGA unit 220,
A driving logic unit 225 that stores driving logic for controlling the power transmission unit 210,
A measurement logic unit 226 storing measurement logic for measuring current and voltage in the power transmission unit 210,
A self-correcting logic unit 227 that stores a self-correcting logic for correcting an error occurring in the current or voltage measurement in the power transmission unit 210 as the driving time progresses,
A protection reset unit 228 for initializing the protection control unit 200 after power cutoff occurs,
An information storage unit 229 for storing programs and data for driving the FPGA unit 220,
A self-test logic unit (22a) that stores a self-test logic that checks whether the protection control unit 200 itself is in a normal state,
External control input unit (22b) receiving a forced signal or user input from the outside for power cutoff
DC power supply device, characterized in that it further comprises at least one selected from.
In the control method of the DC power supply device 1000 according to claim 1,
An error generation step in which an error situation occurs;
A high-speed blocking step in which the main high-speed switching control unit 211 and the supervisory high-speed switching control unit 212 are blocked;
A stable shut-off step in which the voltage of the power transmission unit 210 is stabilized to zero while the crowbar part 213 is short-circuited;
A mechanical blocking step in which the switch unit 300 is cut off as a control signal is output from the external control output unit 223;
A power cut-off step of stopping power supply of the power output unit 110 by the external error input unit 130 as the internal monitoring unit 221 transmits an error condition;
Control method of a DC power supply device comprising a.
In the control method of the DC power supply device 1000 according to claim 6,
An error generation step in which an error situation occurs;
A high-speed blocking step in which the main high-speed switching control unit 211 and the supervisory high-speed switching control unit 212 are blocked;
A stable shut-off step in which the voltage of the power transmission unit 210 is stabilized to zero while the crowbar part 213 is short-circuited;
A mechanical blocking step in which the switch unit 300 is cut off as a control signal is output from the external control output unit 223;
A power cut-off step of stopping power supply of the power output unit 110 by the external error input unit 130 as the internal monitoring unit 221 transmits an error condition;
A power dissipation step in which the flyback diode unit 217 is conducted so that the residual power passes through the bypass load unit 218 so that the residual power is extinguished;
Control method of a DC power supply device comprising a.
In the control method of the DC power supply device 1000 according to claim 10,
An error generation step in which an error situation occurs;
A high-speed blocking step in which the main high-speed switching control unit 211 and the supervisory high-speed switching control unit 212 are blocked;
A stable shut-off step in which the voltage of the power transmission unit 210 is stabilized to zero while the crowbar part 213 is short-circuited;
A mechanical blocking step in which the switch unit 300 is cut off as a control signal is output from the external control output unit 223;
A power cut-off step of stopping power supply of the power output unit 110 by the external error input unit 130 as the internal monitoring unit 221 transmits an error condition;
An error transmission step of transmitting an error situation to the other DC power supply device 1000 where an error situation is not detected by the protection chain unit 224;
Control method of a DC power supply device comprising a.
The method according to any one of claims 12 to 14,
Overvoltage generated in the load target 500, overcurrent generated in the load target 500, a low voltage generated in the load target 500, a malfunction occurring in the power supply unit 100 or the protection control unit 200 A method of controlling a DC power supply, characterized in that at least one selected from among is detected as an error condition.
The method of claim 15,
The control method of a DC power supply device, characterized in that it is determined as an overvoltage, overcurrent, or undervoltage error condition when a voltage or current above or below a predetermined error criterion occurs by the protection control unit 200.
The method of claim 16,
The control method of a DC power supply device, characterized in that a plurality of error criteria are set step by step, and different error criteria are applied according to a situation determined in advance by the protection control unit 200 to perform blocking.
The method according to any one of claims 12 to 14,
The control method of a DC power supply device, characterized in that the protection control unit 200 stores voltage or current information for a predetermined interval before and after an error condition occurs.

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