JP7513315B1 - Processing system, processing method, and program - Google Patents

Abstract

[Problem] To provide a processing system having a converter circuit including a switching element having a primary side circuit and a secondary side circuit via a transformer, capable of suppressing the occurrence of reverse current flowing from the secondary side circuit to the primary side circuit. [Solution] The processing system includes a converter circuit having a first primary side circuit and a second secondary side circuit connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, load means which is a load of the converter circuit, first detection means which detects a current supplied from the second circuit to the load means, and first determination means which determines whether or not the current flowing in the first circuit is equal to or less than a predetermined current value based on the current detected by the first detection means. [Selected Figure] Figure 7

Description

The present disclosure relates to a processing system, a processing method, and a program.

Information processing systems, electronic devices, and other devices that require a power source are used in a variety of fields. In such devices, a converter circuit that employs a full-bridge converter or a synchronous rectification method that supplies current to a load may be used. Patent Document 1 discloses related technology, including a correction circuit and power supply device technology that improves the accuracy of control when intermittent oscillation occurs in a converter.

JP 2020-167859 A

However, in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer, there is a possibility that a current may flow back from the secondary circuit to the primary circuit. Therefore, in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer, there is a demand for a technology that can suppress the occurrence of a reverse current flowing from the secondary circuit to the primary circuit.

Each aspect of the present disclosure aims to provide a processing system, processing method, and program that can solve the above problems.

To achieve the above object, according to one aspect of the present disclosure, a processing system includes a converter circuit having a first circuit on the primary side and a second circuit on the secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, a load means which is a load of the converter circuit, a first detection means which detects a current supplied from the second circuit to the load means, and a first determination means which determines whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the first detection means.

To achieve the above object, according to another aspect of the present disclosure, a processing method is executed by a processing system including a converter circuit having a first circuit on the primary side and a second circuit on the secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means being a load of the converter circuit, the processing method including detecting a current supplied from the second circuit to the load means, and determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current.

To achieve the above object, according to another aspect of the present disclosure, a program causes a processing system including a converter circuit having a first circuit on the primary side and a second circuit on the secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means which is a load of the converter circuit, to detect a current supplied from the second circuit to the load means, and to determine whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current.

According to each aspect of the present disclosure, in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer, it is possible to suppress the occurrence of reverse current flowing from the secondary circuit to the primary circuit.

1 is a diagram illustrating an example of a configuration of a power supply system according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating an example of a processing flow of a power supply system according to an embodiment of the present disclosure. FIG. 11 is a first diagram for explaining the operation content in which a malfunction occurs in a power supply system compared to an embodiment of the present disclosure. FIG. 11 is a second diagram for explaining the operation content in which a malfunction occurs in a power supply system compared to an embodiment of the present disclosure. FIG. 11 is a third diagram for explaining the operation content in which a malfunction occurs in a power supply system compared to an embodiment of the present disclosure. FIG. 4 is a fourth diagram for explaining the operation content in which a malfunction occurs in a power supply system compared to an embodiment of the present disclosure. FIG. 1 illustrates a minimum configuration of a processing system according to an embodiment of the present disclosure. FIG. 13 is a diagram illustrating an example of a processing flow of a processing system with a minimum configuration according to an embodiment of the present disclosure. FIG. 1 is a schematic block diagram illustrating a configuration of a computer according to at least one embodiment.

Hereinafter, the embodiments will be described in detail with reference to the drawings.
<Embodiment>
(Configuration of power supply system circuit)
A power supply system 1 according to an embodiment of the present disclosure will be described with reference to the drawings. The power supply system 1 is a system that can suppress the occurrence of a reverse current flowing from a secondary circuit to a primary circuit in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer.

Figure 1 is a diagram showing an example of the configuration of a power supply system 1 according to an embodiment of the present disclosure. As shown in Figure 1, the power supply system 1 includes a converter circuit 10, a primary control circuit 20, a secondary control circuit 30, an inductor 40, a first capacitor 50, a second capacitor 60, a load section 70, a primary current detection circuit 80, a secondary load current detection circuit 90, and a primary-secondary control circuit 100.

As shown in FIG. 1, the converter circuit 10 includes a first circuit 101, a second circuit 102, and a transformer 103.

The first circuit 101 is a primary side circuit of the converter circuit 10. As shown in FIG. 1, the first circuit 101 includes switching elements 101a1, 101a2, 101a3, and 101a4. The switching elements 101a1, 101a2, 101a3, and 101a4 are sometimes collectively referred to as switching elements 101a. The switching elements 101a form a bridge circuit. An example of the switching element 101a is a MOSFET (Metal Oxide Silicon Field Effect Transistor).

The second circuit 102 is a secondary circuit of the converter circuit 10. As shown in FIG. 1, the second circuit 102 includes switching elements 102a1, 102a2, 102a3, and 102a4. The switching elements 102a1, 102a2, 102a3, and 102a4 are sometimes collectively referred to as switching elements 102a. The switching elements 102a form a bridge circuit. An example of the switching element 102a is a MOSFET.

The transformer 103 couples the first circuit 101 and the second circuit 102. The transformer 103 realizes the exchange of power between the first circuit 101 and the second circuit 102 according to a winding ratio, which is the ratio between the number of windings on the primary side and the number of windings on the secondary side.

The primary control circuit 20 controls the switching operation of the switching element 101a. As shown in FIG. 1, the primary control circuit 20 includes a primary control circuit switching signal output unit 201. The primary control circuit switching signal output unit 201 is connected to each of the switching elements 101a. The primary control circuit switching signal output unit 201 controls each of the switching elements 101a to an on or off state by outputting an on-off pulse signal to each of the switching elements 101a. The on-off pulse signal is a signal that turns each of the switching elements 101a to an on or off state.

The primary control circuit 20 also monitors the current flowing through the first circuit 101 detected by the primary current detection circuit 80. The primary control circuit 20 also notifies the secondary control circuit 30 of a control instruction via the signal line L1 based on monitoring information indicating the monitored current. The signal line L1 connects the primary control circuit 20 and the secondary control circuit 30. The signal line L1 is a signal line for controlling the secondary control circuit 30 from the primary control circuit 20. For example, when the primary control circuit 20 determines that no current is flowing through the first circuit 101 based on the monitoring information indicating the monitored current, it notifies the secondary control circuit 30 of an instruction to stop the switching operation of the switching element 102a. With this notification, even when the load unit 70 is unloaded or under a low load, the second circuit 102 is stopped, and the occurrence of a reverse current from the second circuit 102 to the first circuit 101 can be suppressed.

The secondary control circuit 30 controls the switching operation of the switching element 102a. As shown in FIG. 1, the secondary control circuit 30 includes a secondary control circuit switching signal output unit 301. The secondary control circuit switching signal output unit 301 is connected to each of the switching elements 102a. The secondary control circuit switching signal output unit 301 controls each of the switching elements 102a to an on or off state by outputting an on-off pulse signal to each of the switching elements 102a. The on-off pulse signal is a signal that turns each of the switching elements 102a to an on or off state.

When the secondary control circuit 30 receives an instruction from the primary control circuit 20 via the signal line L1 to stop the switching operation of the switching element 102a, the secondary control circuit 30 stops the switching operation of the switching element 102a in response to the instruction.

The inductor 40 and the first capacitor 50 form a filter at the output of the converter circuit 10. This filter reduces voltage ripple at the output of the converter circuit 10.

The second capacitor 60 reduces the voltage ripple at the output of the power source that supplies power to the converter circuit 10, i.e., the voltage ripple at the input of the converter circuit 10.

The load unit 70 receives power from the second circuit 102. In other words, the load unit 70 is a load of the converter circuit 10.

The primary current detection circuit 80 is provided on the primary side of the converter circuit 10. The primary current detection circuit 80 detects the current flowing through the first circuit 101. The primary current detection circuit 80 notifies the primary control circuit 20 of information indicating the detected current via signal line L2. The signal line L2 connects the primary control circuit 20 and the primary current detection circuit 80. The signal line L2 is a signal line for notifying the primary control circuit 20 of information indicating the current flowing through the first circuit 101 detected by the primary current detection circuit 80.

The secondary load current detection circuit 90 is provided on the secondary side of the converter circuit 10. The secondary load current detection circuit 90 detects the current supplied from the second circuit 102 to the load section 70. The secondary load current detection circuit 90 notifies the primary-secondary control circuit 100 of information indicating the detected current via signal line L5. The signal line L5 connects the secondary load current detection circuit 90 and the primary-secondary control circuit 100. The signal line L5 is a signal line for notifying the primary-secondary control circuit 100 of information indicating the current flowing through the second circuit 102 detected by the secondary load current detection circuit 90.

As shown in FIG. 1, the primary-secondary control circuit 100 includes a control unit 1001 and a memory unit 1002. In the primary-secondary control circuit 100, the control unit 1001 is connected to the memory unit 1002. The control unit 1001 monitors the state of control of the first circuit 101 performed by the primary control circuit 20. An example of the state of control of the first circuit 101 is the state of control such as switching operation by the switching element 101a. The control unit 1001 also notifies the primary control circuit 20 of an operation instruction via the signal line L3. The signal line L3 connects the primary control circuit 20 and the primary-secondary control circuit 100. The signal line L3 is a signal line through which the primary-secondary control circuit 100 notifies the primary control circuit 20 of an operation instruction.

The control unit 1001 also monitors the control status of the second circuit 102 performed by the secondary control circuit 30. An example of the control status of the second circuit 102 is the status of control such as switching operation by the switching element 102a. The control unit 1001 also notifies the secondary control circuit 30 of an operation instruction via signal line L4. Signal line L4 connects the secondary control circuit 30 and the primary-secondary control circuit 100. Signal line L4 is a signal line through which the primary-secondary control circuit 100 notifies the secondary control circuit 30 of an operation instruction.

The control unit 1001 also monitors information indicating the current detected by the secondary load current detection circuit 90. Based on the monitoring information indicating the monitored current, the control unit 1001 notifies the secondary control circuit 30 of a control instruction via the signal line L4. The signal line L4 connects the secondary control circuit 30 and the primary-secondary control circuit 100. The signal line L4 is a signal line for controlling the secondary control circuit 30 from the primary-secondary control circuit 100. For example, when the control unit 1001 determines that no current is flowing in the first circuit 101 based on the monitoring information indicating the monitored current, it notifies the secondary control circuit 30 of an instruction to stop the switching operation of the switching element 102a. With this notification, even when the load unit 70 is unloaded or under a low load, the second circuit 102 is stopped, and the occurrence of a reverse current from the second circuit 102 to the first circuit 101 can be suppressed.

The control unit 1001 also writes the information obtained from each of the monitored primary control circuit 20, secondary control circuit 30, and secondary load current detection circuit 90 to the memory unit 1002. The control unit 1001 also writes the information instructed to the primary control circuit 20 and secondary control circuit 30 to the memory unit 1002.

The memory unit 1002 stores information obtained by the control unit 1001 from each of the primary control circuit 20, the secondary control circuit 30, and the secondary load current detection circuit 90. The memory unit 1002 also stores information instructed by the control unit 1001 to the primary control circuit 20 and the secondary control circuit 30.

Figure 2 is a diagram showing an example of a processing flow of the power supply system 1 according to an embodiment of the present disclosure. Next, the processing performed by the power supply system 1 according to an embodiment of the present disclosure will be described with reference to Figure 2.

In the converter circuit 10, the primary control circuit 20 controls the switching operation of the switching element 101a (step S1). For example, the primary control circuit switching signal output unit 201 controls each of the switching elements 101a to an on state or an off state by outputting an on-off pulse signal to each of the switching elements 101a. Specifically, the primary control circuit switching signal output unit 201 outputs an on-off pulse signal to the switching element 101a, which repeatedly switches the switching elements 101a2 and 101a3 to an off state when the switching elements 101a1 and 101a4 are on, and switches the switching elements 101a2 and 101a3 to an on state when the switching elements 101a1 and 101a4 are off.

The secondary control circuit 30 controls the switching operation of the switching element 102a (step S2). For example, the secondary control circuit switching signal output unit 301 controls each of the switching elements 102a to an on or off state by outputting an on-off pulse signal to each of the switching elements 102a. Specifically, the secondary control circuit switching signal output unit 301 outputs an on-off pulse signal to the switching element 102a, which repeatedly switches the switching elements 102a2 and 102a3 to an off state when the switching elements 102a1 and 102a4 are on, and switches the switching elements 102a2 and 102a3 to an on state when the switching elements 102a1 and 102a4 are off.

The processing of steps S1 and S2 enables the converter circuit 10 to supply power to the load section 70. Note that the processing of steps S1 and S2 is performed continuously. Also, the processing from step S3 onwards shown below is performed in parallel with the processing of steps S1 and S2.

The primary control circuit 20 monitors the current flowing through the first circuit 101 detected by the primary current detection circuit 80 (step S3). Then, the primary control circuit 20 determines whether or not a current is flowing through the first circuit 101 based on the monitoring information indicating the monitored current (step S4). If the primary control circuit 20 determines that a current equal to or greater than a predetermined current threshold is not flowing through the first circuit 101 (NO in step S4), it notifies the secondary control circuit 30 of an instruction to stop the switching operation of the switching element 102a (step S5).

When the secondary control circuit 30 receives an instruction to stop the switching operation of the switching element 102a from the primary control circuit 20 via the signal line L1, the secondary control circuit 30 stops the switching operation of the switching element 102a in response to the instruction (step S6). Then, the secondary control circuit 30 ends the process.

By the processes of steps S5 and S6, even when the load unit 70 is unloaded or under a low load, the second circuit 102 is stopped, and it is possible to suppress the occurrence of a reverse current from the second circuit 102 to the first circuit 101. However, the primary current detection circuit 80 may malfunction due to switching noise of the switching element 101a or the like. In this case, even when the load unit 70 is under an unloaded or low load, the switching element 102a cannot be stopped.
In preparation for such a case, when the primary control circuit 20 judges that a current equal to or greater than a predetermined current threshold flows in the first circuit 101 (YES in step S4), the primary-secondary control circuit 100 judges whether or not a current flows in the first circuit 101, taking into consideration information on the amount of current to the load section 70 detected by the secondary load current detection circuit 90 (step S7). When the primary-secondary control circuit 100 judges that a current flows in the first circuit 101 (YES in step S7), it returns to the process of step S3. When the primary-secondary control circuit 100 judges that no current flows in the first circuit 101 (NO in step S7), it notifies the secondary control circuit 30 of an instruction to stop the switching operation of the switching element 102a (step S8).

When the secondary control circuit 30 receives an instruction to stop the switching operation of the switching element 102a from the primary-secondary control circuit 100 via the signal line L4, it stops the switching operation of the switching element 102a in response to the instruction (step S9). Then, the secondary control circuit 30 ends the process.

The power supply system 1 (an example of a processing system) according to an embodiment of the present disclosure has been described above. In the power supply system 1, the converter circuit 10 has a first circuit 101 on the primary side and a second circuit 102 on the secondary side connected by a transformer 103, the first circuit 101 being a bridge circuit made of a switching element 101a (an example of a first switching element) and the second circuit 102 being a bridge circuit made of a switching element 102a (an example of a second switching element). The load section 70 (an example of a load means) is a load of the converter circuit 10. The secondary load current detection circuit 90 (an example of a first detection means) detects the current supplied from the second circuit 102 to the load section 70. The primary-secondary control circuit 100 (an example of a first determination means) determines whether the current flowing through the first circuit 101 is equal to or less than a predetermined current value based on the current detected by the secondary load current detection circuit 90.

This power supply system 1 can suppress the occurrence of reverse current flowing from the secondary circuit to the primary circuit in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer.

Here, we will explain the problems caused by the converter circuit in the power supply system to be compared. In a converter circuit that employs a full bridge converter, a synchronous rectification method, etc., when the load is unloaded or low-loaded, the energy stored in the inductor of the output section of the power supply is not consumed. Therefore, if the secondary switching element (e.g., MOSFET) of the converter circuit continues to operate in this state, a current flows in the secondary circuit in the opposite direction to normal. When a reverse current flows to the secondary side in this way, a reverse current also occurs in the primary circuit via the transformer. If the switching element performs normal switching operation while a reverse current is occurring in the primary circuit, there is a possibility that a malfunction (e.g., damage, etc.) will occur in the MOSFET, which is the primary switching element. To avoid this, the primary current detection circuit detects that the current is unloaded or low-loaded from the current flowing in the primary circuit, and outputs an instruction to the secondary control circuit to stop the MOSFET, which is the secondary switching element. However, if the primary current detection circuit malfunctions due to switching noise of the primary MOSFET, etc., the secondary MOSFET may not be stopped even when the load is unloaded or low-loaded. In this case, a malfunction may occur in the MOSFET, which is the primary side switching element, and the converter circuit may stop supplying power to the load. This power supply interruption may also result in a system shutdown accompanied by data loss, etc.

By preparing multiple converters to supply power to the load, it is possible to avoid system shutdowns that could result in data loss due to a power outage if an abnormality occurs in one of the converters. However, in this case, it is necessary to prepare multiple power supply paths from the converters, and multiple converters. Furthermore, if the converter is specified to have a low output voltage and a high output current, the amount of material in the power supply paths from the converter in the system will increase even more, resulting in a large system.

If the above-mentioned primary-side current detection circuit malfunctions due to switching noise of the primary-side MOSFET, etc., and the secondary-side MOSFET cannot be stopped even when the load is unloaded or low, a reverse current flows in the secondary-side circuit in the opposite direction to normal, and a reverse current also occurs in the primary-side circuit via the transformer. When a switching element in a normal converter performs a switching operation while a reverse current is generated in the primary-side circuit, a malfunction occurs in the MOSFET, which is the primary-side switching element. FIG. 3 is a first diagram for explaining the operation of a malfunction occurring in the power supply system 1000 compared in one embodiment of the present disclosure. FIG. 4 is a second diagram for explaining the operation of a malfunction occurring in the power supply system 1000 compared in one embodiment of the present disclosure. FIG. 5 is a third diagram for explaining the operation of a malfunction occurring in the power supply system 1000 compared in one embodiment of the present disclosure. FIG. 6 is a fourth diagram for explaining the operation of a malfunction occurring in the power supply system 1000 compared in one embodiment of the present disclosure. Here, we will explain the operation that causes a malfunction in the power supply system 1000 to be compared, with reference to Figures 3 to 6.

The MOSFETs, which are the switching elements on the primary and secondary sides of the converter circuit, alternately turn on and off as shown in Figures 3 and 4 by the switching signals from the switching signal output sections of the primary and secondary control circuits. This operation enables power to be supplied to the load section. However, when there is no load or a low load, the energy stored in the inductor near the output end of the power supply of the secondary circuit is not consumed by the load section, as shown in Figures 5 and 6. If the MOSFETs, which are the switching elements on the secondary side, continue to operate in this state, a current flows in the secondary circuit in the opposite direction to normal. When a reverse current flows in the secondary circuit in this way, a reverse current also occurs in the primary circuit through the transformer. For example, when a reverse current flows in the secondary circuit in Figure 5, a reverse current flows through the body diodes of Q01 and Q04 of the MOSFETs, which are the switching elements on the primary side, through the transformer. If a current flows in the forward direction through the body diode, and the MOSFET is turned off and a reverse voltage is applied, a large recovery current flows in the reverse direction, and as shown in Figure 6, the recovery current flows through the Q01 diode, and Q02 turns on, causing a short circuit current to flow. When switching operations like this occur, there is a possibility that a malfunction will occur in the MOSFET, which is the primary side switching element.

In another embodiment of the present disclosure, the load unit 70 may be able to adjust the load weight under the control of the primary-secondary control circuit 100. In this case, instead of the process in which the primary-secondary control circuit 100 outputs an instruction to stop the switching element 102a to the secondary control circuit 30 in one embodiment of the present disclosure, in another embodiment of the present disclosure, the primary-secondary control circuit 100 may instruct the load unit 70 to make the load weight heavier via the signal line L6 shown in FIG. 1. In response to this instruction, the load unit 70 increases the amount of current flowing through the load unit 70. As a result, it is possible to suppress the occurrence of a reverse current from the second circuit 102 to the first circuit 101. The signal line L6 connects the load unit 70 and the primary-secondary control circuit 100. The signal line L6 is a signal line through which the primary-secondary control circuit 100 notifies the load unit 70 of an instruction to make the load weight heavier.

The power supply system 1 according to another embodiment of the present disclosure may include a converter circuit other than a full-bridge converter. Even in the case of a converter circuit other than a full-bridge converter, the primary-secondary control circuit 100 can obtain information on the actual and accurate current value by comparing information on both the current value flowing through the circuit corresponding to the first circuit 101 on the primary side via a transformer 103 or the like and the current value flowing to the load section 70 at the output near end of the converter circuit 10 of the circuit corresponding to the second circuit 102 on the secondary side, in terms of the influence of the occurrence of reverse current in the secondary circuit. The actual and accurate current value makes it possible to quickly stop the switching operation of the secondary side switching element when an abnormality occurs, even in the power supply system 1 including a converter circuit other than a full-bridge converter. In a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer, the occurrence of reverse current flowing from the secondary circuit to the primary circuit can be suppressed.

7 is a diagram showing a minimum configuration of a processing system 300 according to an embodiment of the present disclosure. As shown in FIG. 7, the processing system 300 includes a converter circuit 3001, a load means 3002, a first detection means 3003, and a first determination means 3004. The converter circuit 3001 has a first circuit on the primary side and a second circuit on the secondary side connected by a transformer, the first circuit being a bridge circuit consisting of a first switching element, and the second circuit being a bridge circuit consisting of a second switching element. The load means 3002 is a load of the converter circuit 3001. The first detection means 3003 detects a current supplied from the second circuit to the load means 3002. The first determination means 3004 determines whether the current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the first detection means 3003. The converter circuit 3001 can be realized, for example, by using the function of the converter circuit 10 illustrated in FIG. 1. The load means 3002 can be realized, for example, by using the function of the load section 70 illustrated in FIG. 1. The first detection means 3003 can be realized, for example, by using the function of the secondary load current detection circuit 90 illustrated in FIG. 1. The first determination means 3004 can be realized, for example, by using the function of the primary-secondary control circuit 100 illustrated in FIG. 1.

Figure 8 is a diagram showing an example of a processing flow of a processing system 300 with a minimum configuration according to an embodiment of the present disclosure. Next, the processing of a processing system 300 with a minimum configuration according to an embodiment of the present disclosure will be described with reference to Figure 8.

A processing system 300 including a converter circuit 3001 having a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means 3002 being a load of the converter circuit 3001,
The first detection means 3003 detects a current supplied from the second circuit to the load means 3002 (step S101). The first determination means 3004 determines whether or not the current flowing through the first circuit is equal to or less than a predetermined current value, based on the current detected by the first detection means 3003 (step S102).

A minimum configuration processing system 300 according to an embodiment of the present disclosure has been described above. This processing system 300 can suppress the occurrence of reverse current flowing from the secondary circuit to the primary circuit in a processing system having a converter circuit including a switching element having a primary circuit and a secondary circuit via a transformer.

The order of the processes in the embodiments of the present disclosure may be changed as long as appropriate processing is performed.

Although the embodiments of the present disclosure have been described, the above-mentioned power supply system 1, primary control circuit 20, secondary control circuit 30, load section 70, primary current detection circuit 80, secondary load current detection circuit 90, primary-secondary control circuit 100, and other control devices may have a computer system inside. The above-mentioned process steps are stored in the form of a program on a computer-readable recording medium, and the above-mentioned process is performed by having the computer read and execute this program. Specific examples of computers are shown below.

Figure 9 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. As shown in Figure 9, the computer 5 includes a CPU 6, a main memory 7, a storage 8, and an interface 9.

For example, the above-mentioned power supply system 1, primary control circuit 20, secondary control circuit 30, load unit 70, primary current detection circuit 80, secondary load current detection circuit 90, primary-secondary control circuit 100, and other control devices are each implemented in a computer 5. The operation of each of the above-mentioned processing units is stored in the storage 8 in the form of a program. The CPU 6 reads the program from the storage 8 and expands it in the main memory 7, and executes the above-mentioned processing according to the program. The CPU 6 also secures memory areas in the main memory 7 corresponding to each of the above-mentioned memory units according to the program.

Examples of storage 8 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), DVD-ROM (Digital Versatile Disc Read Only Memory), and semiconductor memory. Storage 8 may be an internal medium directly connected to the bus of computer 5, or an external medium connected to computer 5 via interface 9 or a communication line. In addition, when this program is distributed to computer 5 via a communication line, computer 5 that receives the program may expand the program in main memory 7 and execute the above-mentioned process. In at least one embodiment, storage 8 is a non-transitory tangible storage medium.

The program may also realize some of the functions described above. Furthermore, the program may be a file that can realize the functions described above in combination with a program already recorded in the computer system, a so-called differential file (differential program).

Although several embodiments of the present disclosure have been described, these embodiments are merely examples and do not limit the scope of the disclosure. Various additions, omissions, substitutions, and modifications may be made to these embodiments without departing from the spirit and scope of the disclosure.

In addition, some or all of the above embodiments can be described as follows, but are not limited to the following:

(Appendix 1)
a converter circuit including a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element;
a load means which is a load of the converter circuit;
a first detection means for detecting a current supplied from the second circuit to the load means;
a first determination means for determining whether or not a current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the first detection means;
A processing system comprising:

(Appendix 2)
a first control means for controlling the switching of the second switching element;
Equipped with
The first determination means is
when the current flowing through the first circuit is equal to or smaller than a predetermined current value, an instruction to stop the second switching element is output to the first control means;
2. The processing system of claim 1.

(Appendix 3)
The loading means includes:
The load weight is adjustable,
The first determination means is
When the current flowing through the first circuit is equal to or less than a predetermined current value, an instruction is given to the load means to increase the load.
2. The processing system of claim 1.

(Appendix 4)
A second detection means for detecting a current flowing through the first circuit;
Equipped with
The first determination means is
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the second detection means;
4. The processing system according to claim 1 ,

(Appendix 5)
A processing method executed by a processing system including a converter circuit having a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means being a load of the converter circuit,
detecting a current supplied from said second circuit to said load means;
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current;
A processing method comprising:

(Appendix 6)
A processing system including a converter circuit having a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means being a load of the converter circuit,
detecting a current supplied from said second circuit to said load means;
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current;
A program that executes the following.

1... Power supply system 5... Computer 6... CPU
Reference Signs List 7: Main memory 8: Storage 9: Interface 10: Converter circuit 20: Primary control circuit 30: Secondary control circuit 40: Inductor 50: First capacitor 60: Second capacitor 70: Load section 80: Primary current detection circuit 90: Secondary load current detection circuit 100: Primary-secondary control circuit 101: First circuit 101a, 102a: Switching element 102: Second circuit 103: Transformer 201: Primary control circuit switching signal output section 301: Secondary control circuit switching signal output section 1001: Control section 1002: Memory section

Claims (6)

a converter circuit including a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element;
a load means which is a load of the converter circuit;
a first detection means for detecting a current supplied from the second circuit to the load means;
a first determination means for determining whether or not a current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the first detection means;
A processing system comprising: a first control means for controlling the switching of the second switching element;
Equipped with
The first determination means is
when the current flowing through the first circuit is equal to or smaller than a predetermined current value, an instruction to stop the second switching element is output to the first control means;
The processing system of claim 1 . The loading means includes:
The load weight is adjustable,
The first determination means is
When the current flowing through the first circuit is equal to or less than a predetermined current value, an instruction is given to the load means to increase the load.
The processing system of claim 1 . A second detection means for detecting a current flowing through the first circuit;
Equipped with
The first determination means is
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the current detected by the second detection means;
The processing system according to any one of claims 1 to 3. A processing method executed by a processing system including a converter circuit having a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means being a load of the converter circuit,
detecting a current supplied from said second circuit to said load means;
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current;
A processing method comprising: A processing system including a converter circuit having a first circuit on a primary side and a second circuit on a secondary side connected by a transformer, the first circuit being a bridge circuit made up of a first switching element and the second circuit being a bridge circuit made up of a second switching element, and a load means being a load of the converter circuit,
detecting a current supplied from said second circuit to said load means;
determining whether or not the current flowing through the first circuit is equal to or less than a predetermined current value based on the detected current;
A program that executes the following.

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