WO2006033219A1 - Dispositif de protection de circuit - Google Patents

Dispositif de protection de circuit Download PDF

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Publication number
WO2006033219A1
WO2006033219A1 PCT/JP2005/015708 JP2005015708W WO2006033219A1 WO 2006033219 A1 WO2006033219 A1 WO 2006033219A1 JP 2005015708 W JP2005015708 W JP 2005015708W WO 2006033219 A1 WO2006033219 A1 WO 2006033219A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
power supply
value
switching power
protection device
Prior art date
Application number
PCT/JP2005/015708
Other languages
English (en)
Japanese (ja)
Inventor
Kunihiro Miyata
Original Assignee
Pioneer Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Publication of WO2006033219A1 publication Critical patent/WO2006033219A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection

Definitions

  • the present application belongs to the technical field of circuit protection devices.
  • a typical example of the stabilized DC power supply is a switching power supply.
  • This switching power supply is a type of stabilized DC power supply that is controlled by a so-called switching method, and uses a commercial AC power supply or a DC power supply as an input, and uses this as a high-speed switching action of a semiconductor, so that it exceeds the audible frequency. It is converted into high-frequency power and then controlled and rectified to obtain a direct current with a predetermined voltage value. It is characterized by its small size, “light weight” and high efficiency. Recently, it has been widely used as a power supply for most electronic devices including information equipment and communication equipment.
  • the switching power supply device for example, when an alternating current having a voltage value about half of the voltage value standardized as the commercial AC power supply (in Japan, 100 volts AC) is input.
  • the same amount of power can be supplied to the electronic device as when the AC of the standardized original voltage value is input.
  • the switching power supply device has an AC voltage of 220 volts or more. About twice as much as when a standardized input voltage (220 to 230 volts) is applied in order to supply load power with the same amount of power as when 230 volts is applied. Current flows to the primary side, and as a result, the circuit components constituting the primary side are damaged.
  • the present application has been made in view of the above-mentioned problems, and an example of the purpose is to use an input voltage with a low voltage value outside the standard while using circuit parts and the like similar to the conventional ones. It is an object of the present invention to provide a circuit protection device capable of protecting the circuit component from a large current caused by generating a necessary output voltage by using.
  • the invention according to claim 1 provides an output using an input voltage.
  • a generating means such as a switching power supply section for generating a voltage
  • a detecting means such as a voltage detecting section for detecting whether or not the value of the input voltage is less than a preset threshold
  • the value of the input voltage Control means such as a control unit for controlling the generation of the output voltage using the input voltage when the value is less than the threshold.
  • FIG. 1 is a block diagram showing the principle of the present application.
  • FIG. 2 is a block diagram showing a detailed configuration of a switching power supply unit according to the embodiment.
  • FIG. 3 is a flowchart showing the principle of the present application.
  • FIG. 4 is a block diagram showing a schematic configuration of the switching power supply according to the first embodiment.
  • FIG. 5 is a block diagram showing a schematic configuration of a switching power supply according to a second embodiment.
  • FIG. 6 is a block diagram showing a schematic configuration of a switching power supply device according to a third embodiment.
  • FIG. 7 is a block diagram showing a schematic configuration of a switching power supply device according to a fourth embodiment. Explanation of symbols
  • FIG. 1 is a block diagram illustrating the principle of the present application
  • FIG. 2 is a block diagram illustrating details of the switching power supply unit according to the present application
  • FIG. 3 is a flowchart according to the operation of the present application.
  • a switching power supply B includes terminals 1A and 1B that are inserted into an AC outlet or the like as a power source in a production factory and receive AC supply as the power source.
  • An outlet 1 provided, a rectifier 3 having a configuration similar to the conventional one, capacitors 4 and 7, a voltage detection unit 5 as a detection means, and a switching power supply unit 6 as a generation means having a configuration similar to the conventional one
  • the diode 8, the transformer 9, and the control unit 10 as control means.
  • FIG. 1 only the primary side circuit in the transformer 9 is shown for the sake of simplicity of explanation.
  • the switching power supply unit 6 includes a voltage detection switch similar to the conventional one.
  • the present application having such a configuration exerts its effect most, for example, by combining a plurality of types of products each having a plurality of types of alternating currents having different voltage values as driving power.
  • This is the case of production on one production line. That is, for example, as shown in FIG. 3, in the production line, procurement (part S1), assembly preparation (step S 2) and assembly (parts including the circuit protection device according to the present application) for assembly are confirmed.
  • Step S4 In the operation confirmation process (Step S4) and sampling inspection process (Step S5) of all products that are executed after the completion of each process of Step S3), an alternating current with a voltage value lower than the rating is erroneously detected.
  • step S6 When supplied as drive power, according to the present application, the operation of the switching power supply unit 6 is stopped, or the AC supply itself from the outlet 1 is stopped, thereby protecting each circuit shown in FIG. Can do it. Further, as a result, the switching power supply B itself stops, so that the examiner can recognize an error in the AC voltage value applied to the outlet 1 and correct each detection process (steps S4 and S4). The effect that S5) can be redone is also expected. As a result, in the subsequent shipping process (step S6), more products can be shipped without being destroyed by incorrect power supply.
  • the switching power supply BC includes the outlet 1, the rectifier 3, the capacitors 4 and 7, the switching power supply unit 6, the diode 8 and the transformer 9 shown in FIG. 1 includes a resistor 5C1 and a transistor diode 5C2 that function as the voltage detector 5 shown in FIG. 1, transistors 10C1 and 10C2, and resistors 10C3 and 10C4 that function as the controller 10 shown in FIG.
  • the transistor 10C2 is connected between the power supply VCC as the driving power source of the switching power supply unit 6 and the ground.
  • the switching power supply 6 itself is not supplied with power from the power supply VCC, and the operation of the switching power supply 6 is stopped. As a result, the function as the switching power supply BC is stopped, and each circuit is protected.
  • the resistance value of the resistor 5C1 and the rated value of the corner diode 5C2 are input according to a non-standard voltage value that can be input to the outlet 1. Each value should be able to reliably turn off the transistor 10C1.
  • the switching power supply BC of the first embodiment when the AC voltage value as an input becomes less than the standard value, the operation of the switching power supply BC using the AC is stopped. Therefore, even when circuit parts similar to the conventional ones are used, the large current caused by generating the necessary direct current using alternating current having a value less than the standard value.
  • the circuit component can be protected from the above.
  • FIG. 5 the same members as those shown in FIG. 1 are denoted by the same member numbers, and detailed description thereof is omitted.
  • the switching power supply device BDD includes the outlet 1, the rectifier 3, the capacitors 4 and 7, the switching power supply unit 6, the diode 8 and the transformer 9 shown in FIG. 1 includes a resistor 5D1 and a corner diode 5D2 that function as the voltage detection unit 5 shown in FIG. 1, transistors 10D1 and 10D2, and resistors 10D3 and 10D4 that function as the control unit 10 shown in FIG.
  • the transistor 10D2 is connected between the power supply VCC serving as the drive power source of the switching power supply unit 6 and the ground, and the resistor 5D1 and the resistor 10D are connected between the power supply VCC and the base terminal of the transistor 10D1.
  • Ener diode 5D2 is connected in series.
  • the power of the power supply VCC is not supplied to the switching power supply unit 6 itself, and the operation of the switching power supply unit 6 is stopped.
  • the function as the switching power supply BD is stopped, and each circuit is protected.
  • the resistance value of the resistor 5D1 and the rated value of the Zener diode 5D2 were input according to a non-standard voltage value that could be input to the outlet 1. Sometimes it is necessary to have a value that can reliably turn off the transistor 10D1.
  • the switching power supply device BD of the second embodiment described above can also achieve the same effects as the switching power supply device BC that works on the first embodiment described above.
  • FIG. 6 is a block diagram showing a schematic configuration of the switching power supply device according to the third embodiment.
  • the same components as those shown in FIG. Detailed description is omitted.
  • the switching power supply device BA includes the outlet 1, the rectifier 3, the capacitors 4 and 7, the switching power supply unit 6, the diode 8, and the transformer 9 shown in FIG.
  • the resistor 5A1 and the Zener diode 5A2 functioning as the voltage detection unit 5
  • the transistors 10A1 and 10A2 functioning as the control unit 10 illustrated in FIG. 1
  • the resistor 10A3 and the switch 11, and the switch 2 illustrated in FIG. It consists of a functional fuse 2A.
  • the transistor 10A1 when the transistor 10A1 is turned off, the voltage at the base terminal of the transistor 10A2 increases. As a result, the transistor 10A2 is turned on, and the alternating current applied to the outlet 1 is directly applied to the fuse 2A. The Then, the fuse 2A is blown when a current exceeding the above-mentioned rating flows through the fuse 2A.
  • the resistance value of the resistor 5A1 and the rated value of the Zener diode 5A2 were input according to a non-standard voltage value that could be input to the outlet 1. Sometimes it is necessary to have a value that can reliably turn off the transistor 10A1.
  • a predetermined charging time (hereinafter referred to as charging time t) is stored until the necessary charge is accumulated in the capacitor 4.
  • charging time t a predetermined charging time
  • the transistor 10A1 is turned off and the transistor 10A2 is turned on.
  • a current exceeding the rating flows to the fuse 2A, and the fuse 2A may be blown. Therefore, in the switching power supply device BA according to the third embodiment, a switch 11 shown in FIG. 6 is newly provided until the necessary charge is accumulated in the capacitor 4 when the power supply is applied through the outlet 1.
  • the control to turn off the switch 11 is performed.
  • the operation of the switching power supply B using the alternating current is stopped when the voltage value of the alternating current becomes less than the standard value as an input. Therefore, even when circuit parts similar to the conventional ones are used, a large current is generated due to the generation of necessary direct current using alternating current having a value less than the standard value. Can do.
  • a constant value of direct current is obtained from the alternating current whose value varies using the switching power supply unit 6, even if the alternating voltage value is less than the standard value, the value is less than the standard value. It is possible to protect circuit components from large currents caused by generating the necessary direct current using alternating current.
  • FIG. 7 the same members as those shown in FIG. 1 are denoted by the same member numbers, and detailed description thereof is omitted.
  • the switching power supply BB includes the outlet 1, the rectifier 3, the capacitors 4 and 7, the switching power supply unit 6, the diode 8 and the transformer 9 shown in FIG. 1, resistor 5B1 and Zener diode 5B2 functioning as voltage detection unit 5 shown in FIG. 1, transistors 10B1, 10B2 and 10B7 functioning as control unit 10 shown in FIG. 1, resistors 10B5, 10B6, 10B9 and 10B10, and switch control Section 10B8, light emitting element 10B3 and light receiving element 10B4 functioning as a photocoupler, and switch 2B corresponding to switch 2 shown in FIG.
  • the transistor 10B1 when the transistor 10B1 is turned off, the voltage of the base terminal of the transistor 10B2 increases, and as a result, the transistor 10B2 is turned on and the light emitting element 10B3 emits light.
  • the resistance value of the light receiving element 10B4 itself decreases, and accordingly, the base voltage of the transistor 10B7 decreases, so that the transistor 10B7 is turned off.
  • the switch control unit 10B8 operates, and the switch 2B is turned off based on the control signal Ssw output from the switch control unit 10B8.
  • the rated value of 5B2 needs to be a value that can reliably turn off the transistor 10B1 when it is input according to a non-standard voltage value that can be input to the outlet 1.
  • the transistor 1OB1 is turned off and the transistor 1 is turned off at the charging time t of the capacitor 4 for the same reason as described in the description of the switch 11 according to the third embodiment.
  • the switch 10B2 being turned on, the switch 2B is controlled to be turned off. Therefore, in the switching power supply BB according to the fourth embodiment, a switch 12 shown in FIG. Control for turning off the switch 12 and turning off the switch 2B by the control signal Sc from the microphone computer (not shown) constituting the control unit 10 shown in FIG. 1 for the accumulation time t from the timing when the power supply is applied. Is to do.
  • the switching power supply BB of the fourth embodiment when the AC voltage value becomes less than the standard value as an input, the operation of the switching power supply BB using the AC is stopped. Therefore, even when circuit parts similar to the conventional ones are used, the circuit parts are also protected by the large current force caused by generating the necessary direct current using alternating current having a value less than the standard value. Can do.
  • the switch 2B is turned off to stop the supply itself to the AC rectifier 3 or the like, thereby operating the switching power supply unit 6. Since the operation is stopped, the circuit components can be reliably protected.
  • each embodiment of the present application in the case where a plurality of types of devices having different switching power supply devices and different AC voltage values as power sources are manufactured on the same production line, etc. In other words, it can greatly contribute to the protection of each device, in other words, the improvement of the yield of each device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Dispositif de protection de circuit pour protéger un composant de circuit contre un courant important, qui est généré en raison de la génération d’une tension de sortie demandée à l’aide d’une tension d’entrée d’une valeur de tension faible non standard, même si le composant de circuit est de même type qu'un composant conventionnel. Le dispositif de protection de circuit est doté d’une partie d’alimentation électrique de commutation (6) qui génère un courant direct stabilisé en tant qu’alimentation électrique d’entraînement à l’aide d’un courant alternatif, une partie de détection de tension (5) qui détecte si la valeur de tension du courant alternatif est inférieure à une valeur de seuil et une partie de commande (10) qui commande pour arrêter la génération de courant direct à l’aide du courant alternatif lorsque la valeur de tension du courant alternatif est inférieure à la valeur de seuil.
PCT/JP2005/015708 2004-09-24 2005-08-30 Dispositif de protection de circuit WO2006033219A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004276690A JP2007329978A (ja) 2004-09-24 2004-09-24 回路保護装置
JP2004-276690 2004-09-24

Publications (1)

Publication Number Publication Date
WO2006033219A1 true WO2006033219A1 (fr) 2006-03-30

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ID=36089983

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/015708 WO2006033219A1 (fr) 2004-09-24 2005-08-30 Dispositif de protection de circuit

Country Status (2)

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JP (1) JP2007329978A (fr)
WO (1) WO2006033219A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04118737U (ja) * 1991-04-05 1992-10-23 カシオ計算機株式会社 電源回路
JPH0513188A (ja) * 1991-06-28 1993-01-22 Toshiba Lighting & Technol Corp 放電灯点灯用電源回路
JPH0916274A (ja) * 1995-06-27 1997-01-17 Omron Corp 電源入力保護回路およびスイッチング電源

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04118737U (ja) * 1991-04-05 1992-10-23 カシオ計算機株式会社 電源回路
JPH0513188A (ja) * 1991-06-28 1993-01-22 Toshiba Lighting & Technol Corp 放電灯点灯用電源回路
JPH0916274A (ja) * 1995-06-27 1997-01-17 Omron Corp 電源入力保護回路およびスイッチング電源

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JP2007329978A (ja) 2007-12-20

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