WO2019123618A1 - Dispositif de détection à passage par zéro et dispositif de conversion de puissance - Google Patents

Dispositif de détection à passage par zéro et dispositif de conversion de puissance Download PDF

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Publication number
WO2019123618A1
WO2019123618A1 PCT/JP2017/045998 JP2017045998W WO2019123618A1 WO 2019123618 A1 WO2019123618 A1 WO 2019123618A1 JP 2017045998 W JP2017045998 W JP 2017045998W WO 2019123618 A1 WO2019123618 A1 WO 2019123618A1
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Prior art keywords
power supply
detected
supply voltage
half wave
point
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PCT/JP2017/045998
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English (en)
Japanese (ja)
Inventor
公輔 小山
達也 前川
宏気 鹿屋
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東芝キヤリア株式会社
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Priority to PCT/JP2017/045998 priority Critical patent/WO2019123618A1/fr
Publication of WO2019123618A1 publication Critical patent/WO2019123618A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to a zero-crossing detecting device for detecting a zero crossing point of an AC power supply voltage, and a power conversion device provided with the zero-crossing detecting device.
  • the zero cross point of the AC power supply voltage is detected to improve power factor and suppress harmonic current, and the switching element is turned on based on the detected zero cross point,
  • the off operation timing is determined. For example, in a high power factor power supply circuit, a short circuit to an AC power supply is formed through the reactor for a predetermined period based on the zero crossing point.
  • the zero cross point of the AC power supply voltage is detected using a photocoupler.
  • the photocoupler used to detect the zero cross point has a rapid rise in output voltage when a current flows through the light emitting element and the light receiving element is turned on, but the output voltage when the light emitting element is turned off and the light receiving element is turned off There is a characteristic that falling is slow. If the on / off state of the photocoupler is detected as the zero cross point of the AC power supply voltage, an error occurs in the detection. As a result, the power converter can not obtain the originally intended power factor improvement and harmonic current suppression effects. In addition, when both positive and negative zero crossings of the AC power supply are detected, a current always flows through the photocoupler in a period excluding the vicinity of the zero crossing, which leads to power loss.
  • An object of the zero-crossing detecting device is to capture the zero-crossing point of the AC power supply voltage efficiently and accurately without error.
  • the zero-crossing detection apparatus includes a photocoupler and an operation unit.
  • the photocoupler has a light emitting element which emits light by a half wave of an AC power supply voltage and a light receiving element which is turned on in response to the light emission of the light emitting element.
  • the operation unit sequentially detects the rising point of the half wave of the AC power supply voltage from the output of the photocoupler, and among the detected rising points, the rising point detected last and the rising point detected one before the last Time interval is detected as the cycle of the alternating current power supply voltage, and the time point when the half of the detected cycle is added to the last detected rising point is the alternating current after the last detected rising point
  • the point at which the zero crossing point of the first half wave of the power supply voltage is estimated, and the point at which the detected period is added to the last detected rising point is estimated as the zero crossing point of the next half wave of the first half wave.
  • FIG. 1 is a block diagram showing the configuration of one embodiment.
  • FIG. 2 is a diagram showing a waveform of an AC power supply voltage, a waveform of an output voltage of a photocoupler, and a waveform of an input voltage to a computing unit in one embodiment.
  • FIG. 3 is a flowchart showing processing of the computing unit in one embodiment.
  • the input end of the converter 2 is connected to the L phase and the N phase of the AC power supply 1, and the input end of the inverter 3 is connected to the output end of the converter 2.
  • the output terminal of the inverter 3 is connected to a brushless DC motor 4 for driving a compressor.
  • Converter 2 includes a reactor 11 disposed in a power supply line connected to L phase of AC power supply 1, a short circuit 12 connected between L phase and N phase of AC power supply 1 via reactor 11, and the above reactor 11.
  • the short circuit 12 includes a bridge circuit of four diodes 12a to 12d and one switching element such as an IGBT (Insulated Gate Bipolar Transistor) 12t.
  • IGBT Insulated Gate Bipolar Transistor
  • Inverter 3 converts the output voltage of converter 2 (voltage of smoothing capacitor 14) into AC voltage of a predetermined frequency by switching according to a command from inverter control unit 40b of controller 40, and drives it to brushless DC motor 4 Output as power.
  • the number of rotations of the brushless DC motor 4 changes in accordance with the frequency (referred to as output frequency) of the output voltage of the inverter 3.
  • a current sensor 5 for detecting a current flowing through the brushless DC motor 4 is disposed for each phase of the current passage between the inverter 3 and the brushless DC motor 4.
  • the anode of a photodiode (light emitting diode) 23a which is a light emitting element of the photocoupler 23 is connected to the L phase of the AC power supply 1 via a diode 21 for half wave rectification and a resistor 22 for power consumption reduction in series.
  • the cathode of the photodiode 23 a is connected to the N phase of the AC power supply 1. That is, this photocoupler 23 is a so-called photodiode coupler.
  • the diode 21 is for protection against applying an excessive reverse voltage to the photodiode 23a, and applies a positive half wave of the AC power supply voltage Vc to the photodiode 23a.
  • the photocoupler 23 has a CTR (Current Transfer Ratio: also referred to as current transfer ratio or conversion efficiency) of, for example, 100% to 300%.
  • a resistor 25b is connected to the positive side terminal 24a via a resistor 25a, and the other end of the resistor 25b is The negative terminal 24b is connected between the collector and the emitter of the NPN transistor 26 which is a semiconductor switch.
  • the resistor 25 a is, for example, 0 ⁇
  • the resistor 25 b is, for example, 1 k ⁇ .
  • the base of the transistor 26 is connected to one end of the resistor 25 b via the collector and the emitter of the phototransistor 23 b which is a light receiving element of the photocoupler 23.
  • a voltage generated in a series circuit of the resistor 25 b and the collector-emitter of the transistor 26 is applied between the base-emitter of the transistor 26 via the collector-emitter of the phototransistor 23 b of the photocoupler 23.
  • the transistor 26 is turned on in response to the rise from the zero level of the base-emitter voltage Va which is the output voltage of the phototransistor 23 b of the photocoupler 23 and is turned off in response to the fall of the base-emitter voltage Va.
  • the voltage Vb between the collector of the transistor 26 and the negative terminal 24 b is input to the operation unit 29 through a noise filter composed of the resistor 27 and the capacitor 28.
  • the voltage Va between the base and the emitter is referred to as the output voltage Va of the photocoupler 23, and the voltage Vb between the collector of the transistor 26 and the negative terminal 24b is referred to as the input voltage Vb to the operation unit 29.
  • the photocoupler 23 has a rapid rise of the output voltage Va when the current flows through the photodiode 23a and the phototransistor 23b operates (turns on), but the conduction to the photodiode 23a stops and the phototransistor 23b turns off. There is a characteristic that the fall of the output voltage Va is slow.
  • Arithmetic unit 29 sequentially detects the rising point of the positive half wave of AC power supply voltage Vc from the change in state (turn on) of transistor 26 based on the output of photocoupler 23, and the time interval between the detected plural rising points. Is detected as the cycle T of the AC power supply voltage Vc as a so-called power supply cycle T, and the zero cross point of the AC power supply voltage Vc in the period after the detected rising point is estimated based on the detected power supply cycle T.
  • a detection unit 29a, a second detection unit 29b, a first estimation unit 29c, and a second estimation unit 29d are included, and a memory 30 is attached and provided.
  • the operation unit 29 can be configured by a microcomputer, and the first detection unit 29a, the second detection unit 29b, the first estimation unit 29c, and the second estimation unit 29d perform their functions by program processing incorporated in the microcomputer. Can be achieved.
  • the rising point of the positive half wave of the AC power supply voltage Vc is the time when the AC power supply voltage Vc starts to change from the zero level toward the positive peak level.
  • the first detection unit 29a captures the change in state (turn-on) of the transistor 26 based on the output of the photocoupler 23 from the input voltage Vb during the operation of the inverter 3, and detects the change in the captured state.
  • the rising points from the zero level are sequentially detected.
  • the second detection unit 29b sequentially sets, as a power supply cycle T, a period between the rising point t2 detected last among the rising points detected by the first detection unit 29a and the rising point t1 detected one before the last. To detect. Rising points t1 and t2 mean time.
  • the second detection unit 29b includes a timer (clocking means) for measuring a period (time) between the rising point t2 and the rising point t1.
  • the controller 50 is notified of the estimated zero cross point Pd.
  • the falling of the positive half wave of the AC power supply voltage Vc means that the AC power supply voltage Vc changes from the positive peak level toward the zero level.
  • the falling zero cross point Pd of the positive half wave of the AC power supply voltage Vc is a point when the AC power supply voltage Vc changes from the positive peak level toward the zero level and crosses the zero level.
  • the rising of the positive half wave of the AC power supply voltage Vc is a state in which the AC power supply voltage Vc changes from the zero level toward the positive peak level.
  • the rising zero cross point Pu of the positive half wave of the AC power supply voltage Vc is the time when the AC power supply voltage Vc changes from the negative level to the positive level and crosses the zero level.
  • the first estimation unit 29c uses the variation of the value of the AC power supply voltage Vc, the variation of CTR of the photocoupler 23, the ambient temperature variation of the photocoupler 23, etc. Not only adding 1/2 of the power supply period T but also adding a correction value "-.DELTA.t" corresponding to the response delay to the last detected rising point t2 in consideration of the response delay of the photocoupler 23 .
  • the correction value “ ⁇ t” is a fixed value obtained by the following experiment using at least one of the value of the AC power supply voltage Vc, the CTR of the photocoupler 23 and the ambient temperature of the photocoupler 23 as a parameter. It is stored in advance.
  • the fluctuation range of the value of the AC power supply voltage Vc is 170 V to 276 V
  • the fluctuation range of the CTR of the photocoupler 23 is 100% to 300%
  • the fluctuation range of the ambient temperature of the photocoupler 23 is -30 ° C to + 80 ° C.
  • the value of AC power supply voltage Vc is set to the lower limit value "170 V” of fluctuation range
  • the CTR of photocoupler 23 is set to the lower limit value "100%” of fluctuation range
  • the ambient temperature of photocoupler 23 is changed range
  • the lower limit value of “ ⁇ 30 ° C.” is set, and in this state, the turn on of the transistor 26 based on the on output of the phototransistor 23 b of the photocoupler 23 is detected as the rising point tx of the positive half wave of the AC power supply voltage Vc.
  • the value of AC power supply voltage Vc is set to the upper limit value "276 V” of fluctuation range
  • the CTR of photo coupler 23 is set to the upper limit value "300%” of fluctuation range
  • the ambient temperature of photo coupler 23 is the upper limit value.
  • the turn-on of the transistor 26 based on the on output of the phototransistor 23b of the photocoupler 23 is detected as the rising point ty of the positive half wave of the AC power supply voltage Vc1.
  • a difference occurs in the rise time of the AC power supply voltage Vc.
  • the power supply frequency is high, the time required for the AC power supply voltage Vc to reach the voltage at which the photocoupler is lit from the zero cross point is shorter than when the power supply frequency is low. Therefore, taking into consideration that there is an area with a power supply frequency of 50 Hz and an area with a power supply frequency of 60 Hz, a correction value “ ⁇ ta” obtained by adding a correction for the power supply frequency of 50 Hz to the correction value ⁇ t
  • the correction value "-.DELTA.tb" to which the correction of the above is added is obtained in advance and stored in the memory 30.
  • the correction value “ ⁇ t” was obtained using three parameters of the value of the AC power supply voltage Vc, the CTR of the photocoupler 23, and the ambient temperature of the photocoupler 23. Any one of these three parameters The correction value “ ⁇ t” may be determined using only one or two parameters.
  • the diode 21, the resistor 22, the photocoupler 23, the positive terminal 24a, the negative terminal 24b, the resistors 25a and 25b, the transistor 26, the resistor 27, the capacitor 8, the computing unit 29, and the memory 30 make the zero cross detection device 20 Is configured.
  • the controller 40 includes a short circuit control unit 40 a that controls the converter 2 and an inverter control unit 40 b that controls the inverter 3.
  • the short circuit control unit 40a controls the operation timing of the IGBT 12t of the converter 2 using the zero crossing points Pd and Pu estimated by the zero crossing detection device 20 for the improvement of the power factor and the suppression of the harmonic current.
  • the on / off switching of the IGBT 12t of the short circuit 12 is performed in a predetermined period with reference to Pd and Pu, for example, a phase 0 ° to 60 ° and / or a specific timing within a phase 120 ° to 180 °. Since the harmonics increase as the number of on / off switching increases, it is desirable that the number of on / off switching is about 1 to 5 times.
  • a short circuit via the reactor 11 to the AC power supply 1 is intermittently formed by the on / off switching. Along with this, the input current from the AC power supply 1 to the converter 2 becomes a sine wave without distortion. This improves the power factor.
  • the inverter control unit 40b estimates the rotational speed of the brushless DC motor 4 from the detected current of the current sensor 5, and switches the inverter 4 at a timing based on the detected current of the current sensor 5 such that the estimated rotational speed becomes the target rotational speed. So as to change the output frequency of the inverter 4 and execute so-called sensorless vector control.
  • the converter 2, the inverter 3, the current sensor 5, the zero cross detection device 20, and the controller 40 constitute a power conversion device that outputs drive power to the brushless DC motor 4.
  • the photodiode 23a of the photocoupler 23 emits light in response to the rise, and the phototransistor 23b receiving the light is turned on.
  • the transistor 26 is turned on in response to the rise. Then, in response to the turning on of the transistor 26, the input voltage Vb to the operation unit 29 changes from the high level "H" to the low level "L".
  • operation unit 29 sets count value n for cycle specification, rising point t1 in memory 30, and flag f for process confirmation to "0". Clear (S2). Then, the operation unit 29 starts time counting t (S3) and monitors the change of the input voltage Vb from high level "H” to low level “L” (S4).
  • the calculation unit 29 confirms the flag f (S5). Since the flag f at this time is "0" (NO in S5), the calculation unit 29 returns to the monitoring of S4.
  • the operation unit 29 increments the count value n by “1” to “1”.
  • the time count t at this time is detected as the rising point (rising timing) t2 of the first (first) positive half wave Vc1 of the AC power supply voltage Vc.
  • the power supply cycle or cycle means the time required for one cycle of the power supply voltage.
  • the calculation unit 29 determines whether or not the detected power supply cycle T1 falls under the appropriate condition (Ta ⁇ T1 ⁇ Tc) such that the detected power supply cycle T1 is not less than the cycle Ta corresponding to the lower limit frequency 45 Hz and less than the cycle Tc corresponding to the upper limit frequency 66 Hz. It judges (S9).
  • the power supply cycle T1 detected at the rise of the first positive half wave Vc1 immediately after the start of the operation of the inverter 3 may be small and may not satisfy the appropriate condition. If the power supply cycle T1 does not satisfy the appropriate condition (NO in S9), the calculation unit 29 clears the power supply cycle T1 to "0" (S10). Then, the operation unit 29 updates and holds the rising point t2 detected this time as the rising point t1 in the memory 30 (S16). Subsequently, when the operation of the inverter 3 is not stopped (NO in S17), the operation unit 29 returns to S4 and monitors the change of the input voltage Vb from high level "H" to low level "L".
  • the calculation unit 29 confirms the flag f (S5). Since the flag f at this time is still "0" (NO in S5), the calculation unit 29 returns to the monitoring of S4.
  • the calculation unit 29 determines whether the detected power supply cycle T2 satisfies the appropriate condition (Ta ⁇ T2 ⁇ Tc) (S9). If the power supply cycle T2 satisfies the appropriate condition (YES in S9), the calculation unit 29 compares the power supply cycle T2 with the cycle Tb corresponding to the reference frequency 55 Hz (S11). If the power supply cycle T2 is less than or equal to the cycle Tb (T2 ⁇ Tb; YES in S11), the calculation unit 29 determines that the power supply frequency is 50 Hz and sets 1 / l of the power supply cycle T2 to the rising point t2 detected this time.
  • the calculation unit 29 notifies the short circuit control unit 40a of the controller 40 of the estimated zero crossing point Pd (S14). Subsequently, the operation unit 29 sets the flag f to "1" (S15), and updates and holds the rising point t2 in the memory 30 as the rising point t1 in the memory 30 (S16). If the operation of inverter 3 is not stopped (NO at S17), operation unit 29 returns to S4 to monitor the change of input voltage Vb from high level "H" to low level "L".
  • the correction value "-.DELTA.tz” is either one of the correction value "-.DELTA.ta” for 50 Hz or the correction value "-.DELTA.tb” for 60 Hz used according to the comparison result of S11.
  • operation unit 29 notifies the estimated zero crossing point Pu to the short circuit control unit 40a of the controller 40 (S19), and clears the flag f to "0" (S20). Subsequently, if the operation of inverter 3 is not stopped (NO at S17), operation unit 29 returns to S4 and monitors the change of input voltage Vb from high level "H” to low level “L”. .
  • the calculation unit 29 determines whether the detected power supply cycle T3 satisfies the appropriate condition (Ta ⁇ T3 ⁇ Tc) (S9). If the power supply cycle T3 satisfies the appropriate condition (YES in S9), the calculation unit 29 compares the power supply cycle T3 with the cycle Tb corresponding to the reference frequency 55 Hz (S11). If the power supply cycle T3 is equal to or less than the cycle Tb (T3 ⁇ Tb; YES in S11), the calculation unit 29 determines that the power supply frequency is 50 Hz, the power supply cycle detected immediately before the rising point t2 detected this time.
  • the calculation unit 29 determines that the power supply frequency is 60 Hz, and holds 1 to 1 of the power supply cycle T3 at the rising point t2 held this time.
  • the point (t2 + T3 / 2- ⁇ tb) at which the value of / 2 and the correction value "- ⁇ tb" for 60 Hz are added is estimated as the zero-crossing point Pd of the falling edge of the third half wave (the next time) S13).
  • the calculation unit 29 notifies the short circuit control unit 40a of the controller 40 of the estimated zero crossing point Pd (S14). Subsequently, the operation unit 29 sets the flag f to "1" (S15), and updates and holds the rising point t2 in the memory 30 as the rising point t1 in the memory 30 (S16). If the operation of inverter 3 is not stopped (NO at S17), operation unit 29 returns to S4 to monitor the change of input voltage Vb from high level "H" to low level "L".
  • operation unit 29 notifies the estimated zero crossing point Pu to the short circuit control unit 40a of the controller 40 (S19), and clears the flag f to "0" (S20). Subsequently, if the operation of inverter 3 is not stopped (NO at S17), operation unit 29 returns to S4 and monitors the change of input voltage Vb from high level "H” to low level “L”. .
  • the falling zero cross point Pd of the third positive half wave Vc3 and the rising zero cross point Pu of the fourth positive half wave Vc4 are estimated. I will not.
  • the next power supply cycle T4 is detected based on the rising point t2 of the fourth positive half wave Vc4 to be detected next, and the fourth positive half wave Vc4 is detected based on the power supply cycle T4. And the rising zero cross point Pu of the fifth (next) positive side half wave Vc5 are estimated.
  • the photocoupler 23 has a rapid rise of the output voltage Va when the current flows through the photodiode 23a and the phototransistor 23b is turned on, but the output voltage Va when the conduction to the photodiode 23a is stopped and the phototransistor 23b is turned off. Fall is slow. For this reason, as in the prior art, when on and off of the photocoupler 23 are detected as the zero cross point of the AC power supply voltage Vc, an error occurs in detection.
  • a light emitting element emitting light by a half wave of an AC power supply voltage and a photo coupler having a light receiving element turned on in response to the light emission of the light emitting element
  • the rising point of the wave is detected, the time interval between the detected rising points is detected as the period of the AC power supply voltage, and the zero crossing point of the AC power supply voltage in the period after the detected rising point is detected
  • an operation unit that estimates based on the above. Therefore, in consideration of the characteristics of photocoupler 23, the rising point of the positive half wave corresponding to the rising of output voltage Va is sequentially detected through photocoupler 23, and power supply cycle T is detected from each detected rising point.
  • the zero cross points Pd and Pu of the AC power supply voltage Vc are You can catch it properly.
  • the rising points of the positive half wave are sequentially detected, the actual power supply cycle T is detected from each detected rising point, and the next and the next time on the basis of the detected power supply cycle T. Since the zero crossing points Pd and Pu are estimated, the zero crossing points Pd and Pu can be accurately estimated regardless of the local power supply situation.
  • the correction value “ ⁇ t” is added to the estimation of the zero cross points Pd and Pu, a photocoupler that takes fluctuation of the value of the AC power supply voltage Vc, fluctuation of CTR of the photocoupler 23, ambient temperature fluctuation of the photocoupler 23, etc. The influence on the response delay of 23 can be mitigated, and also at this point, the zero crossing points Pd and Pu can be accurately estimated. Further, since the correction values “ ⁇ ta” and “ ⁇ tb” based on the power supply frequency are added to the estimation of the zero crossing points Pd and Pu, the zero crossing points Pd and Pu can be estimated more accurately.
  • the rising point of the positive half wave of the AC power supply voltage Vc is detected by the photocoupler 23, but the polarity of the diode 21 and the polarity of the photodiode 23a are respectively connected reversely to the state of FIG.
  • the rising point of the negative half wave of the AC power supply voltage Vc may be detected.
  • the rising of the negative half wave of the AC power supply voltage Vc means that the AC power supply voltage Vc changes from the zero level toward the peak level on the negative side.
  • Arithmetic unit 29 estimates the zero cross point Pu of the rise of the negative half wave of AC power supply voltage Vc and the zero cross point Pd of the fall of the negative half wave of AC power supply voltage Vc.
  • the zero cross point Pu of the rise of the negative half wave of the AC power supply voltage Vc is the time when the AC power supply voltage Vc changes from the positive level to the negative level and crosses the zero level.
  • the falling zero cross point Pd of the negative half wave of the AC power supply voltage Vc is a point when the AC power supply voltage Vc changes from the negative peak level toward the zero level and crosses the zero level.
  • the estimated zero crossing points Pd and Pu are used for on / off switching control to improve the power factor.
  • the estimated zero crossing points Pd and Pu are not limited to the above.
  • power factor improvement and suppression of harmonic current can also be performed by applying to a reference of on / off timing of a switching element of a step-up chopper circuit or a switching element of a step-up chopper circuit or a PWM converter which boosts alternating current of alternating current power.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inverter Devices (AREA)

Abstract

La présente invention concerne la détection des points de montée d'une demi-onde d'une tension d'alimentation en courant alternatif à partir de la sortie d'un photocoupleur, la détection de l'intervalle de temps entre une pluralité de points de montée détectés comme étant la période de la tension d'alimentation en courant alternatif, et l'utilisation de la période détectée pour estimer les points de passage par zéro (Pd, Pu) de la tension d'alimentation en courant alternatif dans une période de temps après les points de montée détectés.
PCT/JP2017/045998 2017-12-21 2017-12-21 Dispositif de détection à passage par zéro et dispositif de conversion de puissance WO2019123618A1 (fr)

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PCT/JP2017/045998 WO2019123618A1 (fr) 2017-12-21 2017-12-21 Dispositif de détection à passage par zéro et dispositif de conversion de puissance

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008259395A (ja) * 2007-03-15 2008-10-23 Matsushita Electric Ind Co Ltd 直流電源装置
JP2010273490A (ja) * 2009-05-25 2010-12-02 Panasonic Corp 直流電源装置
JP2012019620A (ja) * 2010-07-08 2012-01-26 Panasonic Corp 電源装置
US20150084535A1 (en) * 2010-08-17 2015-03-26 Cirrus Logic, Inc. Duty factor probing of a triac-based dimmer
JP2017011781A (ja) * 2015-06-17 2017-01-12 三菱重工業株式会社 ゼロクロス点検出装置、電源装置、ゼロクロス点検出方法及びプログラム
JP2017022900A (ja) * 2015-07-13 2017-01-26 パナソニックＩｐマネジメント株式会社 単独運転検出装置、及びパワーコンディショナ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008259395A (ja) * 2007-03-15 2008-10-23 Matsushita Electric Ind Co Ltd 直流電源装置
JP2010273490A (ja) * 2009-05-25 2010-12-02 Panasonic Corp 直流電源装置
JP2012019620A (ja) * 2010-07-08 2012-01-26 Panasonic Corp 電源装置
US20150084535A1 (en) * 2010-08-17 2015-03-26 Cirrus Logic, Inc. Duty factor probing of a triac-based dimmer
JP2017011781A (ja) * 2015-06-17 2017-01-12 三菱重工業株式会社 ゼロクロス点検出装置、電源装置、ゼロクロス点検出方法及びプログラム
JP2017022900A (ja) * 2015-07-13 2017-01-26 パナソニックＩｐマネジメント株式会社 単独運転検出装置、及びパワーコンディショナ

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