WO2015079722A1 - 電源装置及び電気機器 - Google Patents
電源装置及び電気機器 Download PDFInfo
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- WO2015079722A1 WO2015079722A1 PCT/JP2014/060403 JP2014060403W WO2015079722A1 WO 2015079722 A1 WO2015079722 A1 WO 2015079722A1 JP 2014060403 W JP2014060403 W JP 2014060403W WO 2015079722 A1 WO2015079722 A1 WO 2015079722A1
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- voltage
- switching element
- transformer
- power supply
- intermittent operation
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/01—Resonant DC/DC converters
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
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- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
- H02M1/0035—Control circuits allowing low power mode operation, e.g. in standby mode using burst mode control
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- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- the present invention relates to a power supply device that includes a current resonance circuit that is driven by a switching element, and that operates the switching element in a continuous operation and an intermittent operation, and an electric device including the power supply device.
- the 2-converter system includes, for example, a main power supply circuit that supplies power to a load that consumes a large amount of power and a sub power supply circuit that supplies power to a load such as a control circuit that consumes a relatively small amount of power.
- the circuit and the sub power circuit are operated, and only the sub power circuit is operated during standby, thereby reducing standby power.
- the 2-converter system has to be provided with two power supply circuits, and has a demerit that the power supply device becomes larger and the cost becomes higher.
- the power supply circuit is a single main power supply circuit.
- the load current is large, the operation of the transistor in the switching unit in the power supply circuit is operated continuously.
- the load current is small, the operation of the transistor is operated intermittently.
- a switching power supply device to be controlled is disclosed (see Patent Document 1).
- switching power supply systems include, for example, those using a flyback system and those using a current resonance system.
- a current resonance type power supply device is employed.
- the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a power supply device capable of supplying required power even during standby and an electric device including the power supply device.
- a power supply apparatus includes a current resonance circuit that drives a transformer and a resonance circuit connected to the primary side of the transformer with a switching element that periodically turns on and off, and an external device that exhibits continuous operation or intermittent operation. And a control unit that controls the switching element to operate in a continuous operation in which the switching element is continuously turned on and off in response to a signal and an intermittent operation in which the switching element is intermittently repeated.
- the control unit controls the switching element to intermittently operate according to the voltage detection unit to detect and the external signal indicating the intermittent operation, the voltage detected by the voltage detection unit is a predetermined first
- a switching unit that switches the control unit to control the switching element so as to continuously operate when the voltage becomes lower than a threshold voltage.
- the voltage detector detects the voltage on the secondary side of the transformer, that is, the output voltage.
- the control unit is controlling the intermittent operation of the switching element, that is, when supplying power to a load with relatively low power consumption during standby. It is assumed that the voltage detected by the voltage detector becomes lower than a predetermined first threshold voltage. The voltage detected by the voltage detection unit is lowered because a load having a relatively large power consumption is connected to the output side of the power supply device, so that the load current is increased. In this case, the switching unit switches so that the control unit controls the switching element to change from the intermittent operation to the continuous operation.
- the switching element operation is switched from intermittent operation to continuous operation until the output voltage rises to some extent. Therefore, even if a relatively large load is connected and the load current increases, the switching element operates more than the first threshold voltage. The required power can be supplied even during standby without lowering the output voltage.
- the switching unit when the switching unit switches the switching element to continuously operate, the voltage detected by the voltage detection unit is higher than a second threshold voltage higher than the first threshold voltage.
- the controller is switched so as to control the switching element to operate intermittently.
- the switching unit when the switching unit switches to continuously operate the switching element during standby, the voltage detected by the voltage detection unit becomes higher than the second threshold voltage higher than the first threshold voltage. Is switched so that the control unit controls the switching element to operate intermittently.
- a relatively large load is connected during standby and the operation of the switching element is switched from intermittent operation to continuous operation, a large load current can be supplied.
- the output voltage increases. Therefore, when the voltage (output voltage) detected by the voltage detection unit becomes higher than the second threshold voltage, which is higher than the first threshold voltage, sufficient power is supplied to the load. Return to intermittent operation. Further, since the first threshold voltage and the second threshold voltage are different, it is possible to prevent frequent switching between the intermittent operation and the continuous operation.
- the power supply device is characterized in that the switching unit invalidates voltage detection in the voltage detection unit when an external signal indicating continuous operation is given in the control unit.
- the switching unit invalidates the voltage detection in the voltage detection unit when an external signal indicating continuous operation is given by the control unit. Thereby, it is possible to reliably prevent the operation of the switching element from being switched to the intermittent operation during normal operation (continuous operation).
- the voltage detection unit has a plurality of resistors connected in series to the secondary side of the transformer, and the switching unit converts the voltage divided by the plurality of resistors.
- a photodiode that is turned on or off in response to the phototransistor, and a phototransistor that is provided on the primary side of the transformer and that is turned on or off according to the on or off of the photodiode.
- a transistor that defines the continuous operation or the intermittent operation according to an off state is provided, and the transistor is turned on or off according to on or off of the phototransistor.
- the voltage detection unit has a plurality of resistors connected in series to the secondary side of the transformer. For example, by connecting a plurality of resistors in series between the secondary side of the transformer, that is, between the output terminals of the power supply, and detecting the voltage at the connection point between the resistors, the output voltage is divided into the required voltage by the resistor. Can be pressed.
- the switching unit includes a photodiode that is turned on or off according to the level of the divided voltage (that is, output voltage), and a phototransistor that is provided on the primary side of the transformer and that is turned on or off according to the on or off of the photodiode. And have.
- the control unit includes a transistor and controls the operation of the switching element to be a continuous operation or an intermittent operation depending on whether the transistor is in an on state or an off state. Then, the transistor is turned on or off depending on whether the phototransistor is on or off. Thereby, for example, when the voltage detected by the voltage detection unit is reduced (for example, when the voltage is lower than the first threshold voltage), the phototransistor is turned on and the transistor is turned on, so that the operation mode is continued from the intermittent operation. Even when the operation is switched to standby mode, power can be supplied when an external load is connected.
- the switching unit further includes a diode connected to a cathode of the photodiode, and turns on the diode when an external signal indicating the continuous operation is given. It is characterized by that.
- the switching unit has a diode connected to the cathode of the photodiode, and turns on the diode when an external signal indicating continuous operation is given.
- an external signal indicating continuous operation is given, that is, when the operation mode is continuous operation, the output voltage becomes higher than the first threshold voltage and the second threshold voltage, and the switching unit intermittently operates the switching element. Try to switch to operation. Therefore, by turning on the diode and forcibly turning on the photodiode, the transistor is turned on so that the operation mode becomes a continuous operation. As a result, even when the voltage detection unit is present, the operation of the switching element can be set to the continuous operation when the external signal indicating the continuous operation is given.
- a power supply apparatus includes a current resonance circuit that drives a transformer and a resonance circuit connected to the primary side of the transformer with a switching element that periodically turns on and off, and an external device that exhibits continuous operation or intermittent operation. And a control unit that controls the switching element to operate in a continuous operation in which the switching element is continuously turned on and off in response to a signal and an intermittent operation in which the switching element is intermittently repeated, and a load on a secondary side of the transformer
- the control unit controls the switching element to operate intermittently according to an external signal indicating the intermittent operation and a load detection unit that detects the magnitude
- the load detected by the load detection unit is a predetermined value.
- the said control part is provided with the switching part switched so that it may control so that the said switching element may operate
- the load detector detects the magnitude of the load on the secondary side of the transformer.
- the magnitude of the load is, for example, the magnitude of the current flowing through the load, but is not limited to this.
- the control unit is controlling the intermittent operation of the switching element, that is, when supplying power to a load with relatively low power consumption during standby. It is assumed that the load detected by the load detection unit is greater than a predetermined first threshold value.
- the increase in the load detected by the load detection unit is due to the fact that the load current is increased because a load with relatively large power consumption is connected to the output side of the power supply apparatus. In this case, the switching unit switches so that the control unit controls the switching element to change from the intermittent operation to the continuous operation.
- the switching element operation is switched from intermittent operation to continuous operation until the output voltage rises to some extent. Therefore, even if a relatively large load is connected and the load current increases, the switching element operates more than the first threshold voltage. The required power can be supplied even during standby without lowering the output voltage.
- a power supply apparatus includes a current resonance circuit that drives a transformer and a resonance circuit connected to the primary side of the transformer with a switching element that periodically turns on and off, and an external device that exhibits continuous operation or intermittent operation. And a control unit that controls the switching element to operate in a continuous operation in which the switching element is continuously turned on and off in response to a signal and an intermittent operation in which the switching element is intermittently repeated, and is connected to a secondary side of the transformer.
- a connection determination unit that determines whether or not an external device is connected, and the connection determination unit when the control unit controls the switching element to intermittently operate according to an external signal indicating the intermittent operation. When it is determined that an external device is connected, the control unit includes a switching unit that switches to control the switching element to continuously operate.
- the connection determination unit determines whether or not an external device connected to the secondary side of the transformer is connected. In response to an external signal indicating intermittent operation, when the control unit is controlling the intermittent operation of the switching element, that is, when supplying power to a load with relatively low power consumption during standby, When the connection determination unit determines that an external device is connected, the switching unit switches the control unit so that the switching element is controlled from the intermittent operation to the continuous operation.
- the switching element operation is switched from intermittent operation to continuous operation, so even if the load increases due to the connection of an external device, sufficient power is supplied to the external device. Therefore, required power can be supplied even during standby.
- An electrical device includes a power supply device according to any one of the above-described inventions and a connector provided on the secondary side of the transformer, and when an external signal indicating intermittent operation is given It is possible to supply power to an external device connected to the connector.
- the operation mode when an external signal indicating intermittent operation is given, the operation mode is temporarily switched from intermittent operation to continuous operation even when an external device with relatively large power consumption is connected to the connector. And required power can be supplied to the external device.
- FIG. 3 is a block diagram illustrating an example of a circuit configuration of the power supply device according to the first embodiment.
- 3 is a timing chart illustrating an example of the operation of the power supply device according to the first embodiment.
- FIG. 6 is an explanatory diagram illustrating an example of transition of operation of the power supply device according to the first embodiment. It is a timing chart which shows an example of operation
- FIG. 5 is a block diagram illustrating an example of a circuit configuration of a power supply device according to a second embodiment. 6 is a timing chart illustrating an example of the operation of the power supply device according to the second embodiment.
- FIG. 10 is a block diagram illustrating an example of a circuit configuration of a power supply device according to a third embodiment. 12 is a timing chart illustrating an example of the operation of the power supply device according to the third embodiment.
- FIG. 1 is a block diagram illustrating an example of a circuit configuration of the power supply device 100 according to the first embodiment.
- the input terminal of the power supply device 100 is connected to a commercial power source 1 (for example, AC 100 V, AC 200 V, etc.), receives AC voltage from the commercial power source 1, and full-wave rectifies the received AC voltage with the diode bridge 10 to a DC voltage. Convert.
- a commercial power source 1 for example, AC 100 V, AC 200 V, etc.
- a coil (inductor) 11 and a diode 12 are connected in series, and an FET 13 is connected between a connection point between the coil 11 and the diode 12 and the ground level, and a PFC control circuit.
- Fifteen output terminals G are connected to the gate of the FET 13.
- the coil 11, the diode 12, and the FET 13 form a PFC circuit.
- the PFC control circuit 15 controls the switching operation of the FET 13 so that PFC (Power Factor Correction) can be performed.
- the configuration of the PFC circuit is not limited to the configuration illustrated in FIG. 1, and a choke input type rectifier circuit that widens the conduction angle by the choke coil as long as the current waveform can be made close to a sine wave. Other circuit configurations may be used.
- a smoothing capacitor 14 and FETs 24 and 25 as switching elements connected in series are connected on the output side of the diode 12.
- One end of the primary winding 21 of the transformer 20 is connected to the connection point of the FET 24 and FET 25, and the other end of the primary winding 21 is connected to the ground level via the capacitor 23.
- the secondary winding 22 of the transformer 20 has a three-terminal configuration, and the diode 31 and the anode of the diode 32 are connected to the two terminals, the cathodes of the diodes 31 and 32 are connected to each other, and the output terminal AA. Is connected to the positive terminal. The remaining terminal of the secondary winding 22 is connected to the negative terminal of the output terminal AA.
- a smoothing capacitor 33 is connected to the output side of the diodes 31 and 32.
- the PFC control circuit 15 is supplied with power from a predetermined voltage source Vcc (for example, a DC voltage obtained by rectifying an AC voltage generated by the transformer 20) via the FET 16.
- Vcc a DC voltage obtained by rectifying an AC voltage generated by the transformer 20
- a phototransistor 38 is connected between the gate of the FET 16 and the ground level.
- a photodiode 37 that forms a photocoupler together with the phototransistor 38 is connected between the positive terminal of the output terminal AA and the output terminal C of the MPU 39.
- the current resonance control circuit 17 can be composed of, for example, an IC element or the like, and two output terminals D1 and D2 are connected to the gates of the FET 24 and the FET 25, respectively.
- the inductance and the capacitor 23 included in the transformer 20 constitute a resonance circuit. That is, by alternately turning on or off the FETs 24 and 25, the current flowing in the resonance circuit can be oscillated (resonated).
- the current resonance control circuit 17 has a function as a control unit, and continuously and intermittently repeats ON and OFF of the FET 24 and FET 25 depending on whether the STB terminal is at a high level or a low level. Control is performed so as to operate in an intermittent operation repeatedly. For example, when the STB terminal is at a low level, the operation mode is a continuous mode (normal mode), and the FETs 24 and 25 perform a continuous operation. When the STB terminal is at a high level, the operation mode is an intermittent mode (standby mode), and the FETs 24 and 25 perform an intermittent operation. The intermittent operation is also referred to as a burst operation.
- the current resonance control circuit 17 is supplied with power from a predetermined voltage source Vcc.
- An FET 18 is connected between the STB terminal of the current resonance control circuit 17 and the ground level, and a phototransistor 43 is connected between the gate of the FET 18 and the voltage source Vcc.
- the anode of the photodiode 42 that constitutes the photocoupler together with the phototransistor 43 is connected to the positive terminal of the output terminal AA via the resistor 41.
- the cathode of the photodiode 42 is connected to the ground level via the transistor 54.
- the photodiode 42 and the phototransistor 43 as well as a diode 44, a photodiode 37, and a phototransistor 38, which will be described later, constitute a switching unit, and the FET 18 constitutes a part of the control unit.
- the current resonance control circuit 17 performs control so that the output voltage VO is a constant voltage during normal operation. That is, the phototransistor 35 is connected between the FB terminal of the current resonance control circuit 17 and the ground level. A current that flows in the photodiode 34 that forms the photocoupler together with the phototransistor 35 is input to the FB terminal via the phototransistor 35, and the FETs 24 and 25 are controlled so that the output voltage VO during normal operation becomes a constant voltage.
- the voltage detection unit 50 has a function as a load detection unit, and includes resistors 51 and 52, a control IC 53, a transistor 54, a photodiode 42, and the like.
- the voltage detector 50 can detect the voltage on the secondary side of the transformer 20, that is, the output voltage between the output terminals AA.
- the configuration of the voltage detection unit 50 is not limited to that illustrated in FIG.
- a series circuit of resistors 51 and 52 is connected between the positive terminal and the negative terminal (ground level) of the output terminal AA.
- the input terminal IN of the control IC 53 is connected to the connection point of the resistors 51 and 52.
- the control IC 53 can detect a divided voltage obtained by dividing the output voltage into a required voltage by the resistors 51 and 52 by detecting the voltage at the connection point between the resistors 51 and 52.
- the output terminal OUT of the control IC 53 is connected to the base of the transistor 54 via a resistor 55, and a bias resistor 56 is connected between the base and emitter of the transistor 54.
- the control IC 53 sets the output terminal OUT to a high level to turn on the transistor 54. Further, when the voltage at the input terminal IN becomes higher than a predetermined voltage (second threshold voltage Vth2> first threshold voltage Vth1), the control IC 53 sets the output terminal OUT to a low level and turns off the transistor 54.
- first threshold voltage Vth1 a predetermined voltage
- second threshold voltage Vth2> first threshold voltage Vth1 a predetermined voltage
- the MPU 39 is a microprocessor, for example, and has a function of outputting external signals indicating normal operation (continuous operation) and standby operation (intermittent operation).
- the MPU 39 acquires or generates an external signal indicating normal operation
- the MPU 39 sets the output terminal C connected to the cathode of the photodiode 37 to a low level, and supplies a required current to the photodiode 37 so that the phototransistor 38 is turned on. Shed.
- the MPU 39 acquires or generates an external signal indicating a standby operation
- the MPU 39 sets the output terminal C to a high level, reduces the current flowing through the photodiode 37 so that the phototransistor 38 is turned off, or sets the current to zero. To do.
- the MPU 39 may be only an FET instead of the MPU 39, for example, as long as the MPU 39 receives an external signal indicating normal operation (continuous operation) and standby operation (intermittent operation) and controls on / off of the switching unit.
- a diode 44 serving as a switching unit is connected between the cathode of the photodiode 42 and the cathode of the photodiode 37. More specifically, the anode of the diode 44 is connected to the cathode of the photodiode 42, and the cathode of the diode 44 is connected to the cathode of the photodiode 37.
- the output terminal C is set to a low level, so that a required current is supplied to the photodiode 42 via the diode 44 and the phototransistor 43 is turned on. Can do.
- the FET 18 is turned on regardless of the level of the voltage detected by the voltage detection unit 50, the STB terminal becomes low level, and the FETs 24 and 25 operate in the continuous mode (normal mode).
- a transistor or an element provided with a switching contact can be substituted.
- the anode of the photodiode 34 is connected to the positive terminal of the output terminal AA, and the constant voltage control circuit 36 is connected to the cathode of the photodiode 34.
- a phototransistor 35 that constitutes a photocoupler together with the photodiode 34 is connected between the current resonance control circuit 17 and the ground level.
- the constant voltage control circuit 36 is a circuit that controls the output voltage VO during normal operation to be a constant voltage. Control is performed by detecting the output voltage VO and reflecting the detection result on the current flowing through the FB terminal of the current resonance control circuit 17 via the photodiode 34 and the phototransistor 35.
- FIG. 2 is a timing chart illustrating an example of the operation of the power supply apparatus 100 according to the first embodiment.
- FIG. 3 is an explanatory diagram illustrating an example of a transition of the operation of the power supply apparatus 100 according to the first embodiment.
- the voltage waveform and the current waveform are schematically shown for simplicity, and the actual waveform may be different.
- the waveform of the output current IO in the state S3 is schematically shown for simplicity.
- the MPU 39 acquires or generates an external signal indicating normal operation, and the power supply apparatus 100 operates in the normal mode (continuous mode).
- the output current is a predetermined current
- the output voltage VO is also a predetermined voltage. Since the output terminal C of the MPU 39 is at a low level, a required current flows through the photodiode 37, the phototransistor 38 is turned on, and the PFC circuit is operating.
- the output voltage VO is a predetermined voltage, which is higher than the first threshold voltage Vth1 and the second threshold voltage Vth2, so that the output terminal OUT of the control IC 53 becomes low level and turns off the transistor 54.
- the output terminal C of the MPU 39 is at a low level, a required current flows through the photodiode 42 via the diode 44, so that the phototransistor 43 is turned on, the FET 18 is turned on, and the STB terminal is at a low level (off).
- the FETs 24 and 25 operate in a continuous operation.
- the state transitions from the state S1 to the state S2. That is, since the output terminal C of the MPU 39 is at a high level, the current flowing through the photodiode 37 becomes zero or less, the phototransistor 38 is turned off, and the FET 16 is turned off. As a result, the operation of the PFC circuit stops. Further, since the transistor 54 remains off, the current flowing through the photodiode 42 becomes zero or less, the phototransistor 43 turns from on to off, the FET 18 turns off, and the STB terminal goes to a high level. As a result, the FETs 24 and 25 operate in an intermittent operation. In this case, since the operation of the PFC circuit is stopped, the voltage input to the transformer 20 is not boosted, so the voltage between the source and drain of the FETs 24 and 25 becomes small.
- the output current IO decreases corresponding to the light load in the standby mode. For example, the operation can be continued while maintaining the output voltage VO and the output current IO with a light load of several W or less.
- the state S2 changes to the state S3.
- the output voltage VO starts to decrease from the predetermined voltage.
- the voltage detection unit 50 detects that the output voltage VO is lower than the first threshold voltage Vth1
- the transistor 54 is turned on, and a required current flows through the photodiode 42. Therefore, the phototransistor 43 is turned from off to on.
- the FET 18 is turned on, the STB terminal changes from the high level to the low level, and the FETs 24 and 25 operate in a continuous operation in the standby mode.
- the output current IO can supply sufficient power to the medium load, and thus the output voltage VO starts to rise.
- the voltage detection unit 50 detects that the output voltage VO has become higher than the second threshold voltage Vth2, the transistor 54 is turned off and no current flows through the photodiode 42, so that the phototransistor 43 is turned from on to off. .
- the FET 18 is turned off, the STB terminal changes from the low level to the high level, and the FETs 24 and 25 operate in an intermittent operation in the standby mode. Thereafter, the same operation is repeated.
- FIG. 4 is a timing chart showing an example of the operation of the conventional power supply apparatus in the standby mode.
- the voltage waveform and the current waveform are schematically shown for simplicity, and the actual waveform may be different.
- a state S2 indicates a state in which the switching transistor operates in an intermittent operation in the standby mode, supplying a predetermined small current to the light load and supplying a predetermined output voltage to the light load.
- state S2 when a medium load is connected to the output terminal of the power supply device, the state transitions to state S3, the current supplied by the power supply device decreases, and the output voltage also decreases.
- a power supply device for example, a monitor, a display, etc.
- the electrical equipment shuts down once, the commercial power supply is connected to the power supply, so the control circuit in the power supply starts operating, the electrical equipment restarts, the output voltage increases, and the current also increases. start.
- the switching transistor operates in an intermittent operation, the power that can be supplied again is insufficient, the current and the output voltage are reduced, and the shutdown is performed again. Thereafter, the same operation is repeated.
- the voltage detection unit 50 detects the voltage on the secondary side of the transformer 20, that is, the output voltage VO.
- the current resonance control circuit 17 controls the FETs 24 and 25 to operate intermittently according to an external signal indicating intermittent operation, that is, for a load (light load) with relatively low power consumption during standby.
- the voltage detected by the voltage detection unit 50 is assumed to be lower than the predetermined first threshold voltage Vth1.
- the voltage detected by the voltage detection unit 50 is low because a load (medium load) with relatively large power consumption is connected to the output side of the power supply device, so that the load current increases.
- the phototransistor 43 switches so that the current resonance control circuit 17 controls the FETs 24 and 25 to change from intermittent operation to continuous operation.
- the switching unit phototransistor 43
- the voltage detected by the voltage detection unit 50 is higher than the second threshold voltage Vth2 which is higher than the first threshold voltage Vth1. If so, the current resonance control circuit 17 is switched so as to control the FETs 24 and 25 to operate intermittently.
- a relatively large load is connected during standby and the operation of the FETs 24 and 25 is switched from intermittent operation to continuous operation, a large load current can be supplied.
- the output voltage VO increases. Therefore, when the voltage (output voltage VO) detected by the voltage detection unit 50 becomes higher than the second threshold voltage Vth2 that is higher than the first threshold voltage Vth1, sufficient power is supplied to the load. Therefore, it returns to the intermittent operation which is the operation at the time of standby. Further, since the first threshold voltage Vth1 and the second threshold voltage Vth2 are different, it is possible to prevent frequent switching between the intermittent operation and the continuous operation.
- the diode 44 as the switching unit is a voltage at the voltage detection unit 50. Disable detection.
- the phototransistor 43 and the FET 18 are turned on, and the operation mode is continuously operated. To be. Thereby, even if the voltage detection part 50 exists, when the external signal which shows continuous operation
- a predetermined intermittent operation is performed at light load, so the standby power does not increase and does not affect the standby power.
- required power corresponding to the medium load can be supplied by repeating the continuous operation and the intermittent operation even in the standby mode. That is, an output of about medium power is possible even in the standby mode, and an auxiliary power supply or the like is not required. Therefore, high efficiency, downsizing, cost reduction, circuit simplification, substrate size reduction, and the like can be achieved.
- FIG. 5 is a block diagram illustrating an example of a circuit configuration of the power supply device 120 according to the second embodiment
- FIG. 6 is a timing chart illustrating an example of an operation of the power supply device 120 according to the second embodiment.
- the difference from the first embodiment is that a current detection circuit 60 as a load detection unit is provided instead of the voltage detection unit 50.
- the state S1 and the state S2 are the same as those in the first embodiment.
- state S2 for example, when a medium load exceeding several W (for example, about several tens of W) is connected to the output terminal AA, the state transitions from state S2 to state S3.
- the output voltage VO decreases from a predetermined voltage, and the output current IO starts to increase to supply power to the load.
- the current detection circuit 60 detects that the output current IO is larger than the first threshold current Ith1, the current detection circuit 60 outputs ON, and a required current flows through the photodiode 42. From off to on. As a result, the FET 18 is turned on, the STB terminal changes from the high level to the low level, and the FETs 24 and 25 operate in a continuous operation in the standby mode.
- the current detection circuit 60 detects that the output current IO is smaller than the second threshold current Ith2, the current detection circuit 60 outputs OFF, and no current flows through the photodiode 42, so that the phototransistor 43 is turned on. To turn off. As a result, the FET 18 is turned off, the STB terminal changes from the low level to the high level, and the FETs 24 and 25 operate in an intermittent operation in the standby mode. Thereafter, the same operation is repeated.
- required power can be supplied even during standby.
- FIG. 7 is a block diagram illustrating an example of a circuit configuration of the power supply device 140 according to the third embodiment.
- FIG. 8 is a timing chart illustrating an example of an operation of the power supply device 140 according to the third embodiment.
- the difference from the first embodiment is that a USB-DOWN load detection circuit 70 as a connection determination unit is provided instead of the voltage detection unit 50.
- the connection determination unit includes a USB-DOWN load detection circuit 70, for example.
- the USB-DOWN load detection circuit 70 is, for example, a machine provided in a connector (not shown) (also referred to as a USB-DOWN connector or a DOWN connector) that supplies power to an external device from the output terminal AA of the power supply device 140. It can be constituted by a switch such as a mechanical switch or an electrical switch.
- the USB-DOWN load detection circuit 70 detects “detection high” and “detection low” as USB-DOWN load connection.
- the USB-DOWN load detection circuit 70 when an external device cable (also referred to as a USB-DOWN cable) is connected to the DOWN connector, the switch is switched (for example, from OFF to ON). It may be switched from on to off.) By detecting “detection high”, it is determined that the external device is connected (connected). Further, when the cable of the external device is not connected to the DOWN connector, the USB-DOWN load detection circuit 70 determines that the external device is not connected (not connected) by detecting “detection low”.
- an external device cable also referred to as a USB-DOWN cable
- state S2 indicates a case where no external device is connected.
- the USB-DOWN load connection becomes detection high, and the state transitions from state S2 to state S3.
- the USB-DOWN load detection circuit 70 supplies a required current to the photodiode 42, and the phototransistor 43 is turned on from off.
- the FET 18 is turned on, the STB terminal changes from the high level to the low level, and the FETs 24 and 25 operate in a continuous operation in the standby mode.
- the USB-DOWN load connection becomes detection low, and transitions from state S3 to state S2.
- the USB-DOWN load detection circuit 70 cuts off the current flowing through the photodiode 42, and the phototransistor 43 is turned off from on.
- the FET 18 is turned off, the STB terminal changes from the low level to the high level, and the FETs 24 and 25 operate in an intermittent operation in the standby mode. Thereafter, the same operation is repeated depending on whether or not an external device is connected.
- required power can be supplied even during standby.
- the power supply devices 100, 120, and 140 described above can be incorporated in electrical devices such as monitors and displays.
- an external signal indicating intermittent operation is acquired from the outside or inside of the electrical device, power consumption is relatively reduced in a connector (for example, a USB connector) connected to the output terminal AA of the power supply device 100, 120, 140.
- a connector for example, a USB connector
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Abstract
Description
以下、本発明に係る電源装置を実施の形態を示す図面に基づいて説明する。図1は実施の形態1の電源装置100の回路構成の一例を示すブロック図である。電源装置100の入力端は、商用電源1(例えば、AC100V、AC200Vなど)に接続され、商用電源1から交流電圧を受電し、受電した交流電圧をダイオードブリッジ10で全波整流して直流電圧に変換する。
図5は実施の形態2の電源装置120の回路構成の一例を示すブロック図であり、図6は実施の形態2の電源装置120の動作の一例を示すタイミングチャートである。図5において、実施の形態1との相違点は、電圧検出部50に代えて、負荷検出部としての電流検出回路60を具備する点である。
図7は実施の形態3の電源装置140の回路構成の一例を示すブロック図であり、図8は実施の形態3の電源装置140の動作の一例を示すタイミングチャートである。図7において、実施の形態1との相違点は、電圧検出部50に代えて、接続判定部としてのUSB-DOWN負荷検出回路70を具備する点である。図7に示すように、接続判定部は、例えば、USB-DOWN負荷検出回路70を備える。
18 FET(制御部、トランジスタ)
20 変圧器(電流共振回路)
21 1次巻線
22 2次巻線
23 キャパシタ(電流共振回路)
24、25 FET(スイッチング素子)
39 MPU
42 フォトダイオード(切替部)
43 フォトトランジスタ(切替部)
44 ダイオード(切替部)
50 電圧検出部(負荷検出部)
60 電流検出回路(負荷検出部)
70 USB-DOWN負荷検出回路(接続判定部)
Claims (8)
- 変圧器及び該変圧器の一次側に接続された共振回路を周期的にオン及びオフを繰り返すスイッチング素子で駆動する電流共振回路と、連続動作又は間欠動作を示す外部信号に応じて前記スイッチング素子がオン及びオフを連続的に繰り返す連続動作及び間欠的に繰り返す間欠動作で動作すべく制御する制御部とを備える電源装置において、
前記変圧器の二次側の電圧を検出する電圧検出部と、
前記間欠動作を示す外部信号に応じて、前記制御部が前記スイッチング素子を間欠動作すべく制御している場合に、前記電圧検出部で検出した電圧が所定の第1閾値電圧より低くなったときは、前記制御部が前記スイッチング素子を連続動作すべく制御するように切り替える切替部と
を備えることを特徴とする電源装置。 - 前記切替部は、
前記スイッチング素子を連続動作すべく切り替えた場合に、前記電圧検出部で検出した電圧が前記第1閾値電圧より高い第2閾値電圧より高くなったときは、前記制御部が前記スイッチング素子を間欠動作すべく制御するように切り替えるようにしてあることを特徴とする請求項1に記載の電源装置。 - 前記切替部は、
前記制御部で連続動作を示す外部信号が与えられている場合に、前記電圧検出部での電圧検出を無効とすることを特徴とする請求項1又は請求項2に記載の電源装置。 - 前記電圧検出部は、
前記変圧器の2次側に直列に接続された複数の抵抗を有し、
前記切替部は、
前記複数の抵抗で分圧された電圧に応じてオン又はオフするフォトダイオードと、
前記変圧器の1次側に設けられ、前記フォトダイオードのオン又はオフに応じてオン又はオフするフォトトランジスタと
を有し、
前記制御部は、
オン状態又はオフ状態に応じて前記連続動作又は間欠動作を画定するトランジスタを有し、
前記フォトトランジスタのオン又はオフに応じて前記トランジスタをオン又はオフさせるようにしてあることを特徴とする請求項3に記載の電源装置。 - 前記切替部は、
さらに、前記フォトダイオードのカソードに接続されたダイオードを有し、
前記連続動作を示す外部信号が与えられている場合に、前記ダイオードをオンするようにしてあることを特徴とする請求項4に記載の電源装置。 - 変圧器及び該変圧器の一次側に接続された共振回路を周期的にオン及びオフを繰り返すスイッチング素子で駆動する電流共振回路と、連続動作又は間欠動作を示す外部信号に応じて前記スイッチング素子がオン及びオフを連続的に繰り返す連続動作及び間欠的に繰り返す間欠動作で動作すべく制御する制御部とを備える電源装置において、
前記変圧器の二次側の負荷の大小を検出する負荷検出部と、
前記間欠動作を示す外部信号に応じて、前記制御部が前記スイッチング素子を間欠動作すべく制御している場合に、前記負荷検出部で検出した負荷が所定の第1閾値より大きくなったときは、前記制御部が前記スイッチング素子を連続動作すべく制御するように切り替える切替部と
を備えることを特徴とする電源装置。 - 変圧器及び該変圧器の一次側に接続された共振回路を周期的にオン及びオフを繰り返すスイッチング素子で駆動する電流共振回路と、連続動作又は間欠動作を示す外部信号に応じて前記スイッチング素子がオン及びオフを連続的に繰り返す連続動作及び間欠的に繰り返す間欠動作で動作すべく制御する制御部とを備える電源装置において、
前記変圧器の二次側に接続される外部機器の接続の有無を判定する接続判定部と、
前記間欠動作を示す外部信号に応じて、前記制御部が前記スイッチング素子を間欠動作すべく制御している場合に、前記接続判定部で外部機器が接続されたと判定したときは、前記制御部が前記スイッチング素子を連続動作すべく制御するように切り替える切替部と
を備えることを特徴とする電源装置。 - 請求項1から請求項7までのいずれか1項に記載の電源装置と、前記変圧器の2次側に設けられたコネクタとを備え、間欠動作を示す外部信号が与えられた場合に前記コネクタに接続された外部機器に給電可能にしてあることを特徴とする電気機器。
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Also Published As
Publication number | Publication date |
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AU2014355917B2 (en) | 2017-08-10 |
EP3076537A1 (en) | 2016-10-05 |
AU2014355917A1 (en) | 2016-07-07 |
US9641061B2 (en) | 2017-05-02 |
US20160294273A1 (en) | 2016-10-06 |
CN105765843B (zh) | 2018-11-02 |
JP6433652B2 (ja) | 2018-12-05 |
RU2629554C1 (ru) | 2017-08-30 |
EP3076537A4 (en) | 2016-12-28 |
CN105765843A (zh) | 2016-07-13 |
JP2015104246A (ja) | 2015-06-04 |
RU2629554C9 (ru) | 2018-01-22 |
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