WO2015105041A1 - Rectifier circuit device - Google Patents
Rectifier circuit device Download PDFInfo
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- WO2015105041A1 WO2015105041A1 PCT/JP2015/000022 JP2015000022W WO2015105041A1 WO 2015105041 A1 WO2015105041 A1 WO 2015105041A1 JP 2015000022 W JP2015000022 W JP 2015000022W WO 2015105041 A1 WO2015105041 A1 WO 2015105041A1
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M7/21—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/0085—Partially controlled bridges
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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 disclosure relates to a rectifier circuit device.
- the rectifier circuit device according to the present disclosure is a device that drives a DC load by converting a single-phase AC power source to DC, or by inversely converting once rectified DC power to AC power of an arbitrary frequency by an inverter circuit.
- the present invention is applied to a device that drives an electric motor, for example, a device that performs cooling, heating, or freezing.
- the present disclosure relates to the reduction of harmonic components contained in the input current from the AC power supply and the improvement of the power factor.
- an input current from an AC power supply is simply expressed as an input current or a power supply current, and a harmonic component included in the input current is also expressed as a harmonic current or a power supply harmonic.
- An input voltage from an AC power supply is also simply expressed as an input voltage, an AC voltage, or a power supply voltage.
- This type of rectifier circuit device requires a reactor having a very large inductance in order to reduce harmonic current, leading to an increase in circuit size.
- a semiconductor switch is used to short-circuit the AC power supply through the reactor to store current in the reactor, and then the semiconductor switch is opened to transfer the stored current to the DC side.
- a method of reducing harmonics is employed.
- Patent Document 1 a reactor having a relatively small inductance is employed, and short-circuiting and opening are performed once to several times per power cycle using a semiconductor switch.
- FIG. 39 is a circuit block diagram showing a conventional rectifier circuit device for realizing the above method.
- the AC power supply 101 is short-circuited by the semiconductor switch 103 and the current is stored in the reactor 102 in a period in which the absolute value of the voltage of the AC power supply 101 is small, if the semiconductor switch 103 is opened, the stored current is more It flows to the DC side where the voltage is high.
- the current of the reactor 102 can be transferred to the DC side without performing a short circuit. In this way, the current from the AC power supply 101 flows even during a period when the power supply voltage is low, and a power supply current with less power supply harmonics can be obtained. This method has the advantage that it is not necessary to detect the power supply current.
- FIG. 40 shows another example of a conventional rectifier circuit device. As in FIG. 39, this type of rectifier circuit device, as shown in FIG. 40, short-circuits the AC power supply 101 with the semiconductor switch 103 via the reactor 102 to charge the reactor 102 with current, and the semiconductor switch 103 is turned off. In the state, a current is passed through the load 110 by the diode bridge 106.
- the power supply current flows even when the instantaneous voltage of the AC power supply 101 is low.
- the harmonic component of the power supply current is reduced and the power factor is improved.
- Patent Document 2 a method described in Patent Document 2 has been proposed.
- the terminal voltage of the reactor 102 is observed at the zero cross, which is the moment when the polarity of the AC power supply 101 changes. It is detected that a current flows through the reactor 102 according to whether the voltage is high level or low level. The short circuit by the semiconductor switch 103 is not performed while the current is flowing through the reactor 102 and immediately after that.
- Patent Document 3 As another method, for example, the method described in Patent Document 3 has been proposed. In this method, a reactor having a very small inductance is adopted, and short-circuiting and opening by a semiconductor switch are performed at a frequency much higher than the power supply frequency.
- the short circuit time ratio the time ratio between the short circuit and the open circuit by the semiconductor switch
- FIG. 41 is a circuit block diagram showing another example of the conventional rectifier circuit device described in Patent Document 3. As shown in FIG. 41, power from the AC power supply 101 is rectified by a diode 106a, a diode 106b, a diode 106c, and a diode 106d. The rectified DC power is short-circuited and opened by the semiconductor switch 103 via the reactor 102.
- the energy stored in the reactor 102 at the time of a short circuit flows into the smoothing capacitor 109 via the diode 105.
- the input current increases, and when the short circuit time becomes shorter, the input current decreases.
- control circuit 111 controls the rectified DC current detected by the current detection means 107 to be the same as the waveform of the input voltage detected by the voltage detection means 115.
- the waveform of the input current substantially matches the waveform of the voltage of the AC power supply 101 (hereinafter referred to as AC voltage), and a rectifier circuit with less power supply harmonics is configured.
- JP 2000-217363 A Japanese Patent Laid-Open No. 2007-300762 JP-A-63-224698 JP 2011-200069 A
- the power factor is slightly reduced and the power harmonics are slightly increased.
- phase at which the instantaneous value of the power supply current is maximized is detected and the drive pattern is switched so as to match the phase at which the instantaneous value of voltage is maximized (for example, , See Patent Document 4).
- the phase having the maximum instantaneous value is referred to as a peak phase.
- FIG. 42 is a circuit block diagram showing another example of a conventional rectifier circuit device that performs the driving pattern switching method.
- the zero cross detecting means 113 detects the zero cross of the input voltage of the AC power supply 101.
- the control circuit 111 generates a drive pattern using the detected zero cross as a reference phase.
- the voltage detection means 115 detects the input voltage of the AC power supply 101, and the current detection means 107 detects the input current.
- the control circuit 111 detects the peak phase of the input voltage and the peak phase of the input current from the detected input voltage and input current.
- the present disclosure solves the above-described conventional problem, without detecting the instantaneous current at a high frequency, when there is a large load fluctuation, when there is a large variation in component constants, or when the AC power supply voltage is
- An object of the present invention is to provide a rectifier circuit device capable of reducing harmonic current even when distortion is included.
- the present disclosure can also be applied to a case where the reactor is not required to be downsized.
- a rectifier circuit device includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero cross of the voltage of an AC power supply, and an input voltage that detects the voltage of the AC power supply.
- the control circuit estimates the phase of the AC power supply voltage according to the polarity or zero crossing, and is based on the input voltage information for each half cycle or each cycle associated with the AC power supply voltage and the AC power supply voltage phase.
- the semiconductor switch is controlled according to the drive pattern.
- the control circuit further adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the amounts of current flowing from the two AC power supplies detected in the first half and the second half of each half cycle of the AC power supply approach each other.
- the distortion of the input current can be suppressed to the extent of the distortion included in the input voltage.
- a rectifier circuit device of the present disclosure includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero cross of the voltage of an AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, and an input voltage detection circuit And a harmonic extraction circuit that extracts a component excluding the fundamental wave component or an arbitrary harmonic component from the output signal.
- the control circuit estimates the phase of the AC power supply voltage according to polarity or zero crossing, and adds the components extracted by the harmonic extraction circuit to the basic pattern based on the AC power supply voltage phase.
- the semiconductor switch is controlled according to the above.
- the control circuit further adjusts the phase relationship between the basic pattern and the voltage of the AC power supply.
- the waveform of the input current is symmetric with respect to the electrical angle of 90 degrees or 270 degrees, and the input current and the power supply voltage are in phase.
- FIG. 1 is a circuit block diagram of a rectifier circuit device according to the first embodiment of the present disclosure.
- FIG. 2 is a waveform diagram showing the operation of the rectifier circuit device according to the first embodiment.
- FIG. 3A is a waveform diagram of an input voltage and an input current when the AC power supply includes 5% harmonics of 5% in the first embodiment.
- FIG. 3B is a waveform diagram of the input voltage and the input current when the short-circuit time ratio D shown in Formula (1) is used in the first embodiment.
- FIG. 4 is a circuit block diagram of a rectifier circuit device according to the second embodiment of the present disclosure.
- FIG. 5 is a waveform diagram showing the operation of the rectifier circuit device according to the second embodiment.
- FIG. 6 is a circuit block diagram of a rectifier circuit device according to the third embodiment of the present disclosure.
- FIG. 7 is a waveform diagram showing the operation of the rectifier circuit device according to the third embodiment.
- FIG. 8 is a schematic diagram for explaining a DC voltage control method in the rectifier circuit devices according to the first to third embodiments.
- FIG. 9 is a circuit block diagram of a rectifier circuit device according to the fourth embodiment of the present disclosure.
- FIG. 10 is a circuit block diagram of a rectifier circuit device according to the sixth embodiment of the present disclosure.
- FIG. 11 is a circuit block diagram of a rectifier circuit device according to the eighth embodiment of the present disclosure.
- FIG. 12 is a circuit block diagram of a rectifier circuit device according to the ninth embodiment of the present disclosure.
- FIG. 13 is a circuit block diagram of a rectifier circuit device according to the tenth embodiment of the present disclosure.
- FIG. 14 is a circuit block diagram of a rectifier circuit device according to Embodiment 11 of the present disclosure.
- FIG. 15A is a waveform diagram showing an operation of the rectifier circuit device according to the eleventh embodiment.
- FIG. 15B is a waveform diagram showing an operation of the rectifier circuit device according to Embodiment 11.
- FIG. 16 is a circuit block diagram of a rectifier circuit device according to a twelfth embodiment of the present disclosure.
- FIG. 17 is a circuit block diagram of a rectifier circuit device according to a thirteenth embodiment of the present disclosure.
- FIG. 18 is a circuit block diagram of a rectifier circuit device according to a fourteenth embodiment of the present disclosure.
- FIG. 19 is a waveform diagram showing an example of a readjustment method in the rectifier circuit device according to the fourteenth embodiment.
- FIG. 20 is a waveform diagram showing another example of the readjustment method in the rectifier circuit device according to the fourteenth embodiment.
- FIG. 21 is a waveform diagram illustrating an operation of the rectifier circuit device according to the fifteenth embodiment of the present disclosure.
- FIG. 22 is a waveform diagram showing an operation of the rectifier circuit device according to the sixteenth embodiment of the present disclosure.
- FIG. 23 is a waveform diagram illustrating an operation of the rectifier circuit device according to the seventeenth embodiment of the present disclosure.
- FIG. 19 is a waveform diagram showing an example of a readjustment method in the rectifier circuit device according to the fourteenth embodiment.
- FIG. 20 is a waveform diagram showing another example of the readjustment method in the rectifier circuit device according to the fourteen
- FIG. 24 is a circuit block diagram of a rectifier circuit device according to Embodiment 18 of the present disclosure.
- FIG. 25 is a circuit block diagram of a rectifier circuit device according to Embodiment 19 of the present disclosure.
- FIG. 26 is a circuit block diagram of a rectifier circuit device according to a twentieth embodiment of the present disclosure.
- FIG. 27 is a circuit block diagram of a rectifier circuit device according to a twenty-first embodiment of the present disclosure.
- FIG. 28 is a circuit block diagram of a rectifier circuit device according to a twenty-second embodiment of the present disclosure.
- FIG. 29 is a circuit block diagram of a rectifier circuit device according to Embodiment 24 of the present disclosure.
- FIG. 30 is a circuit block diagram of a rectifier circuit device according to Embodiment 26 of the present disclosure.
- FIG. 31 is a circuit block diagram of a rectifier circuit device according to Embodiment 27 of the present disclosure.
- FIG. 32 is a circuit block diagram of a rectifier circuit device according to Embodiment 28 of the present disclosure.
- FIG. 33 is a circuit block diagram of a rectifier circuit device according to Embodiment 29 of the present disclosure.
- FIG. 34A is a waveform diagram showing an operation of the rectifier circuit device according to Embodiment 29 of the present disclosure.
- FIG. 34B is a waveform diagram showing an operation of the rectifier circuit device according to Embodiment 29 of the present disclosure.
- FIG. 35 is a circuit block diagram of a rectifier circuit device according to Embodiment 30 of the present disclosure.
- FIG. 36 is a circuit block diagram of a rectifier circuit device according to Embodiment 31 of the present disclosure.
- FIG. 37 is a circuit diagram illustrating the harmonic reduction operation principle according to the thirty-second embodiment of the present disclosure.
- FIG. 38 is a circuit block diagram of a rectifier circuit device according to Embodiment 36 of the present disclosure.
- FIG. 39 is a circuit block diagram showing an example of a conventional rectifier circuit device.
- FIG. 40 is a circuit block diagram showing another example of a conventional rectifier circuit device.
- FIG. 41 is a circuit block diagram showing another example of a conventional rectifier circuit device.
- FIG. 42 is a circuit block diagram showing another example of a conventional rectifier circuit device.
- a rectifier circuit includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero cross of the voltage of an AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, and an AC A current detection circuit for detecting a current flowing from the power supply; and a DC voltage detection circuit for detecting a DC voltage.
- the control circuit estimates the phase of the AC power supply voltage according to the polarity or zero crossing, and drives based on the input voltage information for each half cycle or each cycle associated with the AC power supply voltage and the AC power supply voltage phase.
- the semiconductor switch is controlled according to the pattern.
- the control circuit further adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the amounts of current flowing from the two AC power supplies detected in the first half and the second half of each half cycle of the AC power supply approach each other.
- a rectifier circuit device includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero crossing of the voltage of the AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, A DC voltage detection circuit for detecting a DC voltage.
- the control circuit estimates the phase of the AC power supply voltage according to the polarity or zero crossing, and is based on the input voltage information for each half cycle or each cycle associated with the AC power supply voltage and the AC power supply voltage phase.
- the semiconductor switch is controlled according to the drive pattern.
- the control circuit further adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the average DC voltage in a period of half a cycle or more of the AC power supply approaches the DC voltage at the peak phase of the instantaneous voltage of the AC power supply. .
- a rectifier circuit device includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero crossing of the voltage of the AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, In order to detect the DC power equivalent, a current detection circuit for detecting the DC current and a smoothing circuit for smoothing the output of the current detection circuit are provided.
- the control circuit estimates the phase of the AC power supply voltage according to the polarity or zero crossing, and is based on the input voltage information for each half cycle or each cycle associated with the AC power supply voltage and the AC power supply voltage phase.
- the semiconductor switch is controlled according to the drive pattern.
- the control circuit further adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the two DC power amounts detected in the first half and the second half of each half cycle of the AC power supply approach each other.
- a rectifier circuit device includes a control circuit that controls the semiconductor switch, a circuit that detects the polarity or zero cross of the voltage of the AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, A DC voltage detection circuit for detecting a DC voltage and a circuit for detecting the presence or absence of a current flowing through the reactor are provided.
- the control circuit estimates the phase of the AC power supply voltage according to the polarity or zero crossing, and is based on the input voltage information for each half cycle or each cycle associated with the AC power supply voltage and the AC power supply voltage phase.
- the semiconductor switch is controlled according to the drive pattern.
- the control circuit further advances the phase of the drive pattern before and after the instant when the instantaneous voltage of the AC power source becomes zero, and advances the phase of the drive pattern relative to the voltage of the AC power source when the current flowing through the reactor is detected. When it is not detected, it is configured to delay with respect to the voltage of the AC power supply.
- the circuit that detects the presence or absence of a current flowing through the reactor includes at least one of the diodes connected to the output side of the rectifier circuit device of the reactor and the output side of the rectifier circuit device. It is detected depending on whether or not it is in a conductive state.
- a rectifier circuit device is configured such that, in the first aspect, the control circuit adjusts the short-circuit time ratio of the drive pattern so that the detected DC voltage approaches the target value. Is.
- the DC voltage can be adjusted with only one type of driving pattern without detecting the instantaneous current.
- the control circuit uses fv ( ⁇ ) as input voltage information for each half cycle or one cycle detected from the voltage of the AC power supply
- the control circuit further adjusts the phase delay ⁇ in equation (1) according to the difference between the two current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected DC voltage and DC voltage.
- the coefficient A in equation (1) is adjusted according to the difference from the target value.
- a rectifier circuit device is configured such that, in the seventh aspect, the control circuit readjusts the short-circuit time ratio according to a ratio between the detected DC voltage and the target value of the DC voltage. It has been done.
- the short circuit time ratio D is calculated using the coefficient A1 in the equation (8) or the coefficient A2 in the equation (9).
- a rectifier circuit device includes a control circuit that controls a semiconductor switch, a circuit that detects the polarity or zero crossing of the voltage of the AC power supply, an input voltage detection circuit that detects the voltage of the AC power supply, A harmonic extraction circuit that extracts a component excluding the fundamental wave component or an arbitrary harmonic component from the output signal of the input voltage detection circuit.
- the control circuit estimates the phase of the AC power supply voltage according to polarity or zero crossing, and adds the components extracted by the harmonic extraction circuit to the basic pattern based on the AC power supply voltage phase.
- the semiconductor switch is controlled according to the above.
- the control circuit is further configured to adjust the phase relationship between the basic pattern and the voltage of the AC power supply.
- a rectifier circuit device is configured such that, in the tenth aspect, the control circuit adjusts the short-circuit time ratio of the drive pattern so that the detected DC voltage approaches the target value. Is.
- a rectifier circuit device is the rectifier circuit device according to the tenth aspect, in which the control circuit has sin ( ⁇ ) as the fundamental component of the voltage of the AC power supply, Vac_harm ( ⁇ ) as the harmonic component, and DC voltage as the harmonic component.
- the control circuit further adjusts the phase delay ⁇ in Equation (10) according to the difference between the two power values or current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected DC voltage.
- the coefficient A in the equation (10) are adjusted according to the difference between the DC voltage and the target value of the DC voltage.
- a rectifier circuit device is the rectifier circuit device according to the first aspect, in which the control circuit detects that the amount of power or the amount of current detected at the beginning, middle, and end of the half cycle of the AC power source is within a predetermined range. It is configured to adjust the drive pattern to enter.
- a rectifier circuit device is configured such that, in the first aspect, the control circuit adjusts the drive pattern so that the waveform of the DC voltage in the half cycle of the AC power supply is symmetrical. It has been done.
- FIG. 1 is a circuit block diagram of a rectifier circuit device according to the first embodiment of the present disclosure.
- the semiconductor switch 3a and the semiconductor switch 3b, the diode 6a and the diode 6b are respectively connected in series.
- One end of the AC power source 1 is connected to a common connection terminal of the semiconductor switches 3a and 3b via the reactor 2.
- a diode 6c and a diode 6d are connected in parallel to the semiconductor switches 3a and 3b in opposite directions, respectively.
- the other end of the AC power source 1 is connected to a common connection terminal of the diodes 6a and 6b.
- the other ends of the semiconductor switch 3 a and the diode 6 a are connected to one end of the smoothing capacitor 9.
- the other ends of the semiconductor switch 3b and the diode 6b are connected to the other end of the smoothing capacitor 9.
- a load 10 is connected to both ends of the smoothing capacitor 9.
- the polarity detection circuit 12 is provided between both ends of the AC power supply 1, detects polarity information indicating which terminal of the AC power supply 1 has a higher potential, and sends the polarity information to the control circuit 11. This polarity information is used to determine which of the semiconductor switches 3a and 3b should be operated.
- the input voltage detection circuit 15 is connected to one end of the AC power supply 1, detects the instantaneous voltage of the AC power supply 1, and sends the information to the control circuit 11 as input voltage information.
- DC voltage detection circuit 14 detects the instantaneous voltage across smoothing capacitor 9 and sends the information to control circuit 11 as DC side voltage information (DC voltage information).
- the current detection circuit 7 detects a current flowing on the DC side.
- the smoothing circuit 8 smoothes the current detected by the current detection circuit 7 and sends the current information to the control circuit 11.
- the control circuit 11 includes a microcomputer and software that operates on the microcomputer, and sends drive control signals to the semiconductor switch drive circuit 4a and the semiconductor switch drive circuit 4b in accordance with various information detected by the detection circuit described above.
- the semiconductor switch drive circuits 4a and 4b drive the semiconductor switches 3a and 3b, respectively, according to the drive control signal.
- control circuit 11 calculates the short-circuit time ratio D in the drive pattern for the semiconductor switch 3a or 3b using the input voltage information and the following equation (1).
- ⁇ is the electrical angle of the AC power supply
- fv ( ⁇ ) is the input voltage information of the half cycle or one cycle of the AC power supply 1
- ⁇ is a positive constant indicating the phase delay.
- fv ( ⁇ ) is assumed to be 0 or more.
- the DC voltage detected by the DC voltage detection circuit 14 is adjusted by adjusting the phase delay ⁇ in the equation (1) according to the difference between the two power values detected in the first half and the second half of each half cycle of the AC power supply 1.
- the coefficient A in the equation (1) is adjusted according to the difference between the target value and the target value.
- the control circuit 11 uses the polarity information and input voltage information of the AC power source 1, DC side voltage information (DC voltage information) that is the voltage across the smoothing capacitor 9, and the smoothed power information to switch the semiconductor switch A drive control signal is sent to the drive circuits 4a and 4b, and the short circuit and the open circuit are controlled using one of the semiconductor switches 3a and 3b.
- DC voltage information DC voltage information
- the smoothed power information is obtained from the DC-side current information detected by the current detection circuit 7 and smoothed by the smoothing circuit 8.
- the semiconductor switch 3b performs short-circuiting / opening.
- the reactor 2 stores current when short-circuited by the semiconductor switch 3b.
- the current stored in the reactor 2 is sent to the smoothing capacitor 9 via the diode 6c when opened.
- the DC voltage detection circuit 14 detects the instantaneous voltage across the smoothing capacitor 9.
- the input voltage detection circuit 15 detects instantaneous voltage information of the AC power supply 1.
- control circuit 11 receives information from all other circuits including the above-described detection circuit, and based on them, performs all operations related to calculation, comparison, determination, setting, adjustment, control, and the like. Shall be in charge.
- FIG. 2 is a waveform diagram showing the operation of the rectifier circuit device according to the present embodiment.
- a method of adjusting the phase of the drive pattern for the semiconductor switch 3a or 3b by the control circuit 11 will be described with reference to FIG.
- the upper right waveform in FIG. 2 indicates an AC voltage
- the lower right waveform indicates a drive pattern for the semiconductor switch 3a or 3b.
- the horizontal axis of the waveform diagrams and the driving pattern diagrams represents the electrical angle of the AC power supply.
- the current detected by the current detection circuit 7 in FIG. 1 is the situation Sa, the situation Sb, and the situation Sc in the second to fourth waveform diagrams on the left side in FIG. Each is shown. That is, no current flows when the semiconductor switch is ON, and current flows into the smoothing capacitor 9 when the semiconductor switch is OFF.
- the waveform diagram at the bottom left side of FIG. 2 is obtained by smoothing these currents in the smoothing circuit 8 and then converting them into power information.
- the waveform indicated by the alternate long and short dash line corresponds to the power in the situation Sa
- the waveform indicated by the dotted line corresponds to the power in the situation Sb
- the waveform indicated by the solid line corresponds to the power in the situation Sc.
- phase modulation of the drive pattern For example, if there is more in the first half as in the power in the situation Sb (the waveform indicated by the dotted line), the entire phase of the drive pattern of the semiconductor switch is advanced. Specifically, the phase delay ⁇ in the equation (1) is reduced.
- the electric energy is the same in the first half and the second half, and the current amount is also the same in the first half and the second half. That is, according to the present embodiment, the current peak coincides with the AC instantaneous voltage peak, and a rectifier circuit device having a high power factor is realized.
- a pattern in which short-circuiting by the semiconductor switch is hardly performed is set in a phase where the absolute value of the instantaneous value of the AC voltage is large. This is based on the characteristics that the current increases as the absolute value of the instantaneous value of the AC voltage increases, and that the amount of increase in current increases as the short-circuit time ratio increases.
- the input current gradually increases as the absolute value of the instantaneous voltage value (instantaneous voltage) increases.
- the absolute value of the instantaneous voltage decreases, the input current gradually decreases.
- phase modulation of the drive pattern in the present embodiment is performed so that the power information (power amount) in the first half and the second half of the half cycle of the AC power supply are equal and the input voltage information is reflected. Is called.
- Such a simple process does not require the accuracy of the inductance of the reactor, can cope with load fluctuations and distortion of the input voltage, and can realize a rectifier circuit device with less power harmonics.
- it is sufficient to detect the power not at every moment but at a frequency at which the change of every quarter cycle of the AC power source is known, so that inexpensive parts can be used.
- the current detection circuit 7 can be used to monitor the current, so that it is not necessary to separately provide a dedicated current detection circuit.
- FIG. 8 is a schematic diagram for explaining a DC voltage control method in the present embodiment. Hereinafter, how the DC voltage is kept constant in the present embodiment will be described with reference to FIG.
- the DC voltage (actual DC voltage) detected by the DC voltage detection circuit 14 is compared with the target value (set DC voltage) of the DC voltage, and the short-circuit time ratio of the drive pattern is adjusted according to the result. As the short-circuit time increases, the energy stored in the reactor 2 increases. At the time of opening, the energy is sent to the smoothing capacitor 9 and the output voltage rises.
- the DC voltage detected using this principle can be brought close to the target value and substantially matched.
- the adjustment amount of the short circuit time ratio is set to increase.
- the adjustment amount of the short circuit time ratio is set to be decreased.
- the input current has a waveform similar to the power supply voltage. Therefore, if the amplitude of the input current is changed while maintaining the waveform of the input current, the DC voltage can be changed. . Therefore, the current change is larger in the phase where the short circuit time ratio is small and the absolute value of the instantaneous voltage is large than in the phase where the short circuit time ratio is large and the absolute value of the instantaneous voltage is small.
- only one type of driving pattern is used without detecting and controlling the instantaneous current by increasing the adjustment amount in the phase where the absolute value of the instantaneous voltage of the AC power supply 1 is large. DC voltage can be adjusted.
- the waveform of the power supply voltage is a sine wave, and for example, the short-circuit time ratio D at the electrical angle ⁇ is defined by the following equation (2).
- Short-circuit time ratio D 1 ⁇ A ⁇ sin ( ⁇ ) (2)
- the coefficient A is adjusted by the difference between the DC voltage and the target value
- the phase delay ⁇ is adjusted by the difference in power between the first half and the second half every half cycle. Since the short-circuit time ratio D is a value not less than 0 and not more than 1, it is set to 1 when the right side exceeds 1, and set to 0 when the right side is smaller than 0.
- the set drive pattern is based on one sine wave.
- the short-circuiting time ratio D is relatively large, and the adjustment amount corresponding to the voltage difference is the period in which the absolute value of the instantaneous voltage of the AC power supply 1 is high. Is greater than the low period.
- FIG. 3A shows an example of the input current when the short circuit time ratio D is set by the above equation (2) when distortion is included in the input voltage.
- FIG. 3A is a waveform diagram of an input voltage and an input current when the AC power supply 1 includes a fifth harmonic of 5%. As shown in FIG. 3A, when the voltage of the AC power supply 1 is distorted, the input current is greatly distorted.
- the control circuit 11 stores the output of the input voltage detection circuit 15 every half cycle as input voltage information fv ( ⁇ ).
- the input voltage information fv ( ⁇ ) is reflected in the calculation of the short circuit time ratio D in the next cycle.
- the formula for calculating the short-circuit time ratio D when reflected is set as shown in Equation (1).
- FIG. 3B is a waveform diagram of the input voltage and the input current when the short-circuit time ratio D shown in Expression (1) is used. As shown in FIG. 3B, the input current can be suppressed to the same distortion as the input voltage.
- the amount of power detected in the first half and the second half of each half cycle of the AC power source 1 is, for example, a certain time (T) before the instant at which the instantaneous value of the AC voltage becomes maximum (electrical angle 90 degrees), for example,
- T a certain time
- the increase / decrease change direction of the absolute value of the instantaneous voltage and the increase / decrease change direction of the short-circuit time ratio D in each phase of the AC power source 1 are opposite, and the adjustment amount according to the difference in DC voltage causes a short circuit.
- the time ratio D is set to have a change characteristic in the opposite direction to the change direction of the magnitude.
- the input voltage information fv ( ⁇ ) of a half cycle is reflected in the calculation of the short circuit time ratio D in the next half cycle.
- the present invention is not limited to this. For example, it may be reflected in the calculation after one cycle.
- FIG. 4 is a circuit block diagram of a rectifier circuit device according to the second embodiment of the present disclosure.
- the circuit configuration of FIG. 4 is substantially the same as that of FIG. 1 except that the current detection circuit 7 is not provided.
- the control circuit 11 receives the output (polarity information) of the polarity detection circuit 12, the output information (DC voltage information) of the DC voltage detection circuit 14, and the output information (input voltage information) of the input voltage detection circuit 15.
- the usage method of the polarity detection circuit 12 and the input voltage detection circuit 15 is the same as that of the first embodiment.
- FIG. 5 is a waveform diagram showing the operation of the rectifier circuit device according to the present embodiment.
- the phase modulation of the drive pattern according to the output information of the DC voltage detection circuit 14 will be described with reference to FIG. Similar to the description of FIG. 2, it is necessary to match the peak of the power sent to the smoothing capacitor 9 with the peak phase of the instantaneous voltage of the AC power supply 1.
- the output of the smoothing capacitor 9 has a ripple like a situation Sc (solid waveform) in the waveform shown in the lower part of the left side of FIG. That is, the DC voltage decreases in the first half of the half cycle and increases in the second half. However, at the voltage peak phase of the AC power supply 1, it is the center of fluctuation and is equal to the average DC voltage.
- Sc solid waveform
- the DC voltage at the voltage peak phase of the AC power supply 1 deviates from the average value. For example, when the phase of the power peak portion advances as in the situation Sb (dotted line waveform), the DC voltage at the voltage peak phase of the AC power supply 1 increases.
- the DC voltage at the same phase decreases. Therefore, the average DC voltage, which is the average value of the DC voltage over a period of more than a half cycle of the AC power supply, is compared with the DC potential at the voltage peak phase of the AC power supply 1, and the AC power supply phase and the drive pattern of the semiconductor switch are compared. Adjust the phase relationship. Thereby, the peak phase of the alternating current coincides with the peak of the instantaneous voltage of the alternating current power supply 1, and a rectifier circuit device having a high power factor can be realized.
- FIG. 6 is a circuit block diagram of a rectifier circuit device according to the third embodiment of the present disclosure.
- the circuit configuration of FIG. 6 is substantially the same as that of FIG. 1 except that the current detection circuit 7 is provided at a position where the current from the AC power supply 1 can be directly detected.
- the control circuit 11 outputs the polarity detection circuit 12 (polarity information), the current detection circuit 7 (current information), the input voltage detection circuit 15 (input voltage information), and the DC voltage detection circuit 14 (DC voltage). Information).
- the usage method of the polarity detection circuit 12, the input voltage detection circuit 15, and the DC voltage detection circuit 14 is the same as that of the first embodiment.
- FIG. 7 is a waveform diagram showing the operation of the rectifier circuit device according to this embodiment.
- the phase adjustment of the drive pattern according to the current information detected by the current detection circuit 7 will be described with reference to FIG. In this case, it is necessary to match the peak phase of the detected current with the peak phase of the instantaneous voltage of the AC power supply 1.
- the peak phases can be matched. Therefore, by comparing the current information (current amount) in the first half and the second half of the half cycle and adjusting the overall phase of the driving pattern of the semiconductor switch, the peak phase of the current matches the peak phase of the instantaneous voltage of the AC power supply.
- a high power factor rectifier circuit device can be realized.
- current detection means are often provided on the AC side, and according to the third embodiment, this current detection means can also be used as a current detection circuit. Can be realized even more easily.
- the specific drive pattern and DC voltage control method and the method of reducing the influence on the input current due to the distortion included in the input power supply are the same as in the first embodiment.
- the detection value at the phase symmetric with respect to the electrical angle of 90 degrees described in the first embodiment is used as a representative value. Is possible as well.
- the detected current amount in the first half and the second half of each half cycle of the AC power supply 1 is a certain time (T: 50, for example) from the time when the instantaneous value of the AC voltage is maximum (electrical angle 90 degrees). And a detected value at a time point (for example, 140 degrees) after the same fixed time (T) from the time at which the instantaneous value of the AC voltage is maximized.
- FIG. 9 is a circuit block diagram of a rectifier circuit device according to the fourth embodiment of the present disclosure.
- the first embodiment is designed with a different circuit configuration.
- the basic circuit configuration in the fourth embodiment is obtained by adding an input voltage detection circuit 15 to that shown in Patent Document 1.
- the AC power supply 1 is short-circuited through the reactor 2 using the semiconductor switch 3.
- the energy stored in the reactor 2 is sent to the smoothing capacitor 9 via the diodes 6a, 6b, 6c and 6d.
- the control circuit 11 is the same as that of the first embodiment except for the selection of the semiconductor switch 3a and the semiconductor switch 3b.
- the control circuit 11 is the same as that of the second embodiment except for the selection of the semiconductor switch 3a and the semiconductor switch 3b.
- FIG. 10 is a circuit block diagram of a rectifier circuit device according to the sixth embodiment of the present disclosure. This embodiment is designed with a circuit configuration further different from that of the above-described embodiment.
- the basic circuit configuration is obtained by adding an input voltage detection circuit 15 to that shown in Patent Document 3.
- the AC power source 1 is rectified by the diodes 6a, 6b, 6c, and 6d, and then short-circuited by the semiconductor switch 3 through the reactor 2.
- the energy stored in the reactor 2 is sent to the smoothing capacitor 9 via the diode 5.
- the information on the input side of the rectifier circuit device is input by the zero-cross information by the zero-cross detection circuit 13 and the input by the input voltage detection circuit 15 as in the above-described fourth embodiment. It is sufficient if voltage information is available.
- the operation of the control circuit 11 is the same as that of the first embodiment except for the selection of the semiconductor switch 3a and the semiconductor switch 3b.
- the current detection circuit 7 according to the sixth embodiment is moved into a loop composed of the diodes 6a, 6b, 6c, 6d, the reactor 2, and the semiconductor switch 3.
- the same function as in the ninth embodiment can be realized.
- the operation of the control circuit 11 is the same as that of the third embodiment except for the selection of the semiconductor switch 3a and the semiconductor switch 3b.
- FIG. 14 is a circuit diagram of a rectifier circuit device according to an eleventh embodiment of the present disclosure.
- the AC power source 1 is connected to the semiconductor switch 3 via one end of the diode bridge 6 and the reactor 2 so as to be short-circuited.
- the output of the reactor 2 and the output of the other end of the diode bridge 6 are connected to the smoothing capacitor 9 and the load 10 via the diode 5.
- the output of the reactor 2 is also connected to the voltage detection circuit 19, and terminal voltage information of the reactor 2 is input to the control circuit 11.
- the voltage information across the smoothing capacitor 9 is detected by the DC voltage detection circuit 14 and the information is also input to the control circuit 11.
- a current can be passed through the reactor 2 even during a period in which the absolute value of the voltage of the AC power supply 1 is small.
- the semiconductor switch 3 is opened, the current flowing through the reactor 2 charges the smoothing capacitor 9 via the diode 5. Thereby, the harmonics of the current flowing from the AC power supply 1 can be reduced.
- FIG. 15A and 15B are waveform diagrams showing the operation of the rectifier circuit device according to the present embodiment.
- the waveform shown in FIG. 15A is obtained when the short circuit and the open circuit by the semiconductor switch 3 operate properly.
- the waveform shown in FIG. 15B is obtained when the short circuit and the open circuit by the semiconductor switch 3 are delayed from the proper state.
- a smaller reactor 2 can be used by short-circuiting and opening the semiconductor switch 3 with a sufficiently high frequency with respect to the cycle of the AC power source 1.
- the instantaneous short-circuit time ratio D is set as a pattern, and the phase of the pattern is adjusted according to the presence or absence of current when the instantaneous voltage of the AC power supply 1 returns to zero.
- the second-stage waveform indicates the short-circuit time ratio D.
- the output signal of the voltage detection circuit 19 has a waveform in which High and Low change frequently as shown in the lowermost stage of FIGS. 15A and 15B.
- the waveform of the power supply voltage is a sine wave, and for example, the short-circuit time ratio D at the electrical angle ⁇ is set by the following equation (2).
- Short-circuit time ratio D 1 ⁇ A ⁇ sin ( ⁇ ) (2)
- the coefficient A is adjusted by the difference between the DC voltage and the target value
- the phase delay ⁇ is adjusted by whether or not current flows through the reactor 2 when the instantaneous voltage of the AC power supply 1 returns to zero. Is done. That is, when the current flowing through the reactor 2 is detected, the phase delay ⁇ is decreased, and when the current flowing through the reactor 2 is not detected, the phase delay ⁇ is increased.
- the short circuit time ratio D is a ratio and must be a value not less than 0 and not more than 1. Therefore, when the right side exceeds 1, it is set to 1 and when the right side is less than 0, it is set to 0.
- the set drive pattern is based on one sine wave.
- the short circuit time ratio D is relatively large.
- the period in which the absolute value of the instantaneous voltage of the AC power supply 1 is high is greater than the period in which it is low.
- FIG. 3A shows an example when the short circuit time ratio D is set according to the above equation (2) when the voltage of the input power supply includes distortion.
- the input current is greatly distorted. This is because the voltage of the input power supply includes distortion, while the voltage expressed by the short-circuit time ratio D is created based on a sine wave pattern that does not include distortion.
- the input voltage information fv ( ⁇ ) is reflected in the calculation formula of the short-circuit time ratio D as described in the first embodiment.
- the short-circuit time ratio D when reflected is calculated by the equation (1).
- control circuit 11 is the same as that of the second embodiment except for the portion related to the phase adjustment.
- FIG. 16 is a circuit block diagram of a rectifier circuit device according to a twelfth embodiment of the present disclosure.
- an AC power source 1 is connected to semiconductor switches 3a and 3b connected in series via a reactor 2.
- the common connection terminals of the semiconductor switches 3 a and 3 b are connected to the input terminal of the diode bridge 6.
- the output voltage of the diode bridge 6 is smoothed by the smoothing capacitor 9.
- the smoothed DC voltage is supplied to the load 10.
- the polarity detection circuit 12 detects the polarity of the instantaneous voltage of the AC power supply 1.
- the phase of the input voltage is estimated from the detected polarity.
- Input voltage information for each half cycle or each cycle associated with the voltage of the AC power supply 1 detected by the input voltage detection circuit 15 and the estimated phase information is calculated.
- One of the two semiconductor switches 3a and 3b is controlled according to the input voltage information.
- This embodiment has a configuration known as a mixed bridge type rectifier circuit. Except for the operation of switching the semiconductor switches 3a and 3b to be driven according to the polarity of the instantaneous voltage of the AC power supply 1, it is the same as a normal mixed bridge type rectifier circuit.
- the logic is inverted depending on the polarity of the instantaneous voltage of the AC power supply 1. Therefore, when the instantaneous voltage of the AC power supply 1 changes from positive to zero, the instantaneous The logic is reversed when the voltage goes from negative to zero.
- the diode 6c and the diode 6d are not conducting, and the voltage detection circuit 119 can obtain intermediate level information.
- control circuit 11 is the same as in the eleventh embodiment except for the handling of the output of the voltage detection circuit 119 and the selection of the semiconductor switch 3a and the semiconductor switch 3b described in the present embodiment.
- the voltage detection circuit 19 shown in FIG. 14 can be used instead of the voltage detection circuit 119, and the method can be implemented only when the instantaneous voltage of the AC power supply 1 changes from positive to zero. It is.
- FIG. 17 is a circuit diagram illustrating a rectifier circuit device according to a thirteenth embodiment of the present disclosure.
- the reactor 2 is directly connected to one end of the AC power source 1 as in the above-described FIG.
- the semiconductor switch 3 is connected between the output of the reactor 2 and the other end of the AC power supply 1 and directly short-circuits the AC power supply 1 and the reactor 2.
- the short-circuit and open-circuit operation method using the semiconductor switch 3 and the DC voltage control method are the same as those in the eleventh embodiment described with reference to FIG.
- the method of using the output information of the voltage detection circuit 119 is the same as that in the twelfth embodiment described with reference to FIG.
- FIG. 18 is based on the same basic circuit configuration as in the first, second and third embodiments shown in FIGS. 1, 4 and 6, respectively.
- FIGS. 1, 4 and 6 respectively.
- an operation during a period in which the terminal to which the reactor 2 is connected among the two output terminals of the AC power supply 1 is at a positive potential will be described.
- the semiconductor switch 3a is in an OFF state, and short-circuiting and opening are performed by the semiconductor switch 3b.
- a short circuit occurs, a short circuit loop is formed by the AC power source 1, the reactor 2, the semiconductor switch 3b, and the diode 6b, and current is stored in the reactor 2.
- the current stored in the reactor 2 flows to the smoothing capacitor 9 and the load 10 via the diode 6c, and flows to the AC power source 1 via the diode 6b.
- Vpwm Vdc ⁇ A ⁇ fv ( ⁇ ) (5)
- the DC voltage includes a ripple component. For this reason, as it is, Vpwm does not reflect only the input voltage information.
- Vpwm Vdc (av) ⁇ A ⁇ fv ( ⁇ ) (7)
- a coefficient A1 shown in the following formula (8) may be used instead of the coefficient A of the arithmetic expression used in the first embodiment, the second embodiment, the third embodiment, and the eleventh embodiment.
- FIG. 19 is a waveform diagram for explaining the flow of this process.
- the actual DC voltage (Vdc) and the set DC voltage (Vdc *) are compared by the comparison circuit 201, and a temporary coefficient A that is a result of the temporary adjustment of the short-circuit time ratio is obtained. can get.
- the readjustment circuit 202 performs the calculation of the above equation (8) using this temporary coefficient A, and readjusts the short-circuit time ratio D. In accordance with the driving pattern using the coefficient A1 obtained in this way, short-circuiting and opening by the semiconductor switch are performed.
- a coefficient A2 represented by the following equation (9) may be used as a method for simplifying instantaneous division. This method can also perform highly accurate correction.
- FIG. 20 is a waveform diagram illustrating the flow of this process, as in FIG. 20, the difference from FIG. 19 is that the readjustment circuit 207 performs the calculation of the above equation (9) and readjusts the short-circuit time ratio D. According to the drive pattern using the coefficient A2 obtained in this way, short-circuiting and opening by the semiconductor switch are performed.
- FIG. 21 is a waveform diagram showing a method for determining the length of the ON period (hereinafter referred to as ON width) in the drive pattern according to the present embodiment.
- ON width the ON width
- the upper left waveform diagram of the left side and the right side shows the AC voltage for a half cycle
- the lower right waveform diagram shows the ON width with respect to the electrical angle in the drive pattern of the semiconductor switch.
- the ON width is the smallest around an electrical angle of 90 degrees.
- the waveform diagrams shown from the second stage to the fourth stage on the left side of FIG. 21 show three situations regarding the detected current. As indicated by the alternate long and short dash line in the second-stage waveform diagram on the left side, in the situation Sa, the difference in detected current is relatively small between a high electrical angle and a low electrical angle.
- the detected current increases rapidly when approaching the electrical angle of 90 degrees, and the detected current decreases rapidly when moving away from the electrical angle of 90 degrees.
- the situation Sc a current having a waveform close to a sine wave is detected as in the AC voltage. That is, among these situations, the situation Sc has the least number of harmonics.
- DC power in the situation Sa has a relatively flat and wide waveform.
- the DC power in the situation Sb has a sharp waveform having a sharp peak near 90 electrical degrees.
- the DC power in the situation Sc shows the most desirable waveform among them.
- the level of the DC power after smoothing in three sections (hereinafter referred to as an early stage, a middle stage, and an end stage in order) equally divided by a half cycle of the power source is compared.
- the power level at the beginning or end of the half cycle is compared with the power level at the middle of the half cycle.
- the power level at the beginning or end of the half cycle is relatively high compared to the middle stage.
- the power level at the beginning or end is relatively small compared to the middle.
- the ratio between the power level in the early stage or the end stage and the power level in the middle stage is appropriate.
- the power is measured at 45 degrees in the early stage, 90 degrees in the middle stage, and 135 degrees in the final stage, and is set as a representative value of each section.
- the power level ratio in the three sections is ideally 1: 2: 1.
- the ON width of the drive pattern is modulated by the following method. As shown in the waveform diagram on the lower right side of FIG. 2, the ON width is generally reduced in the vicinity of the electrical angle of 90 degrees, and the ON width is increased in the vicinity of the electrical angles of 0 degrees and 180 degrees.
- the adjustment amount of the ON width in the case of the situation Sa is made smaller than that in the situation Sc, and in the vicinity of the electrical angle of 0 degree and 180 degrees, the adjustment amount of the ON width in the situation Sa Make it larger than in the case of Sc.
- the adjustment amount of the ON width in the case of the situation Sb is made larger than that in the situation Sc, and in the vicinity of the electrical angle of 0 degree and 180 degrees, the adjustment amount of the ON width in the situation Sb is set to the situation. Make it smaller than in the case of Sc.
- control circuit 11 other than the ON width modulation method based on the three-point comparison within the half cycle of the AC power supply described in the present embodiment is the same as that in the first embodiment and the fourteenth embodiment.
- FIG. 22 is a waveform diagram showing a method for determining the ON width in the drive pattern according to the present embodiment.
- the upper left waveform diagram on the left side and the right side shows an AC voltage for a half cycle.
- the waveform indicated by the alternate long and short dash line indicates the power in the situation Sa, and is a relatively flat and wide waveform.
- the waveform indicated by the dotted line indicates the electric power in the situation Sb, and is a sharp waveform having a sharp peak near an electrical angle of 90 degrees.
- the waveform indicated by the solid line indicates the power in the situation Sc, and shows the most desirable waveform among them.
- the state Sc is the state where the power supply harmonics are the least, and the waveform indicated by the solid line in the left lower waveform diagram is the most desirable waveform for the DC voltage.
- the waveform indicated by the alternate long and short dash line indicates the DC voltage in the situation Sa shown in the left middle waveform diagram.
- a waveform indicated by a dotted line indicates a DC voltage in the situation Sb shown in the left middle waveform diagram.
- the waveform indicated by the solid line indicates the DC voltage in the situation Sc shown in the left middle waveform diagram.
- the DC voltage in the situation Sa rises gently in the vicinity of the electrical angle of 90 degrees, and sharply falls in the vicinity of the electrical angles of 0 degrees and 180 degrees.
- the DC voltage in the situation Sb increases rapidly in the vicinity of the electrical angle of 90 degrees, and gradually decreases in the vicinity of the electrical angles of 0 degrees and 180 degrees.
- the DC voltage in the situation Sc shows a waveform closer to a sine wave than in other situations.
- the shape of the waveform of the input voltage can be estimated by examining the change in the DC voltage in the vicinity of an electrical angle of 45 degrees or 135 degrees.
- the ON width of the drive pattern is modulated using the modulation method described with reference to FIG. 21 in the fifteenth embodiment.
- control circuit 11 other than the ON width modulation method based on the two-point comparison in the first half or the second half in the half cycle of the AC power source described in the present embodiment are the same as those in the second embodiment and the fourteenth embodiment. .
- FIG. 23 is a waveform diagram showing a method for determining the ON width in the drive pattern according to the present embodiment.
- the upper left waveform diagram on the left side and the right side shows the AC voltage for a half cycle.
- the waveform diagram shown in the lower left part of FIG. 23 shows the current detected by the current detection circuit 7.
- the detected current increases rapidly when approaching the electrical angle of 90 degrees, and the detected current decreases sharply away from the electrical angle of 90 degrees, and is sharp near the electrical angle of 90 degrees. It has a sharp waveform with a peak.
- a current having an appropriate waveform close to a sine wave is detected as in the case of the AC voltage.
- the level of the DC current after smoothing is compared in three sections that equally divide the half cycle of the power supply. That is, the current level at the beginning or end is compared with the current level at the middle.
- the current level in the early or final stage is higher than that in the middle stage
- the current level in the early or late stage is smaller than that in the middle stage.
- the current level in the early or late stage and the current level in the middle stage Is the most appropriate of these.
- the current is measured at 45 degrees in the early stage, 90 degrees in the middle stage, and 135 degrees in the final stage, and is set as a representative value of each section.
- the ON width of the drive pattern is modulated by the following method. As shown in the lower right waveform diagram of FIG. 23, the ON width of the drive pattern is modulated using the modulation method described in FIG. 21 in the fifteenth embodiment and FIG. 22 in the sixteenth embodiment. To do.
- control circuit 11 is the same as that of the third embodiment and the fourteenth embodiment except for the ON width modulation method based on the three-point comparison within the half cycle of the AC power supply described in the present embodiment.
- FIG. 24 is a circuit block diagram of the rectifier circuit device according to the present embodiment.
- the circuit configuration in FIG. 24 is obtained by replacing the current detection circuit 7 in the circuit configuration in FIG. 6 with a current transformer 70, a full-wave rectifier circuit 71, and a smoothing circuit 72.
- the control circuit 11 recognizes the load state in accordance with information from the full-wave rectifier circuit 71 and the smoothing circuit 72 and operates efficiently, and Control to prevent damage to equipment due to excessive load.
- the output of the full-wave rectifier circuit 71 is input to the control circuit 11.
- This input waveform has a form in which the waveform of the detection current shown in FIG. 7 is repeated.
- This embodiment has a problem that a direct current component cannot be detected and a problem that distortion caused by passing through the full-wave rectifier circuit 71 is included.
- the current phase can be brought close to the voltage phase and substantially matched.
- the present embodiment has a problem that distortion increases when the current is small.
- class A of IEC61000-3-2 requires that the harmonic current be kept below a certain level within the operating range.
- a simple power transformer can be used to realize a rectifier circuit device with low power supply harmonics and high power factor.
- control circuit 11 other than the portion related to the input current information described in the present embodiment is the same as that in the third embodiment, the fourteenth embodiment, and the seventeenth embodiment.
- FIG. 25 is a circuit block diagram of a rectifier circuit device according to a nineteenth embodiment of the present disclosure.
- the difference between the present embodiment and the first embodiment is that a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 21, and the control circuit 11 is replaced with the control circuit 21. And the calculation formula of the short circuit time ratio D is different. The differences will be described below.
- the input voltage detection circuit 15 detects instantaneous voltage information of the AC power supply 1.
- the harmonic extraction circuit 16 extracts components other than the fundamental wave component from the voltage information of the AC power supply 1. This harmonic component information is used to calculate the short-circuit time ratio D of the drive pattern for the semiconductor switch 3a or 3b.
- the current flowing through the smoothing capacitor 9 is detected by the current detection circuit 7 and smoothed by the smoothing circuit 8.
- the control circuit 21 sends a drive control signal to the semiconductor switch drive circuits 4a and 4b using the polarity information, the harmonic component information, and the smoothed power information of the AC power supply 1, and any one of the semiconductor switches 3a and 3b. Controls short-circuiting and opening using The smoothed power information is obtained from the DC-side current information detected by the current detection circuit 7 and smoothed by the smoothing circuit 8, and the DC voltage information.
- the semiconductor switch 3b is used to short-circuit and open.
- the current stored in the reactor 2 at the time of a short circuit is sent to the smoothing capacitor 9 via the diode 6c at the time of opening.
- the harmonic extraction circuit 16 is composed of a high-pass filter for removing the fundamental wave component from the voltage information of the AC power supply 1. Since the configuration of the high-pass filter is a general technique, a detailed description thereof is omitted.
- the method of reducing the influence of the distortion included in the waveform of the power supply voltage on the input current by the method of reflecting the waveform of the input voltage in the drive pattern has been described.
- the influence of the distortion included in the waveform of the power supply voltage on the waveform of the input current can be more effectively eliminated than in the first embodiment.
- the treatment of the amount of electric power detected in the first half and the second half of each half cycle of the AC power supply, the method of reflecting it in the phase, and the control method for keeping the DC voltage constant are the same as in the first embodiment.
- the short circuit time ratio D will be described.
- the electrical angle ⁇ of the AC power source when the fundamental component of the voltage of the AC power source is sin ( ⁇ ), the harmonic component extracted by the harmonic extraction circuit 16 is Vac_harm ( ⁇ ), and the DC voltage is Vdc, the electrical angle
- the short-circuit time ratio D of the semiconductor switch drive pattern in the vicinity of ⁇ is set by the following equation (10).
- the coefficient A is adjusted by the difference between the DC voltage and the target value
- the phase delay ⁇ is adjusted by the difference in power between the first half and the second half every half cycle. Since the short circuit time ratio D is a value of 0 or more and 1 or less, it is set to 1 when the right side value exceeds 1, and is set to 0 when the right side value is less than 0. As a result, the input current has a waveform without distortion.
- the DC voltage control method and the phase adjustment method using information from the DC voltage detection circuit 14 and the smoothing circuit 8 are the same as those in the first embodiment.
- the fundamental wave component has been described as a sine wave as an example of a formula for obtaining the short circuit time ratio D, it is not limited to this.
- harmonic extraction circuit 16 has been described as being configured by a high-pass filter that removes the fundamental wave component from the voltage information of the AC power supply 1, it may be a filter that extracts an arbitrary harmonic component.
- FIG. 26 is a circuit block diagram of a rectifier circuit device according to a twentieth embodiment of the present disclosure.
- the difference between the present embodiment and the second embodiment is that a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 21, and the control circuit 11 is replaced with the control circuit 21.
- the calculation formula of the short circuit time ratio D is different.
- the method of using the harmonic extraction circuit 16 and the calculation formula for the short-time ratio D are the same as those in the nineteenth embodiment.
- the control circuit 21 receives the output of the polarity detection circuit 12 (polarity information), the output of the DC voltage detection circuit 14 (DC voltage information), and the output of the harmonic extraction circuit 16 (harmonic component information).
- the DC voltage control method and the method for performing phase adjustment using information from the DC voltage detection circuit 14 are the same as those in the second embodiment.
- this embodiment does not require a current detecting means, it can be realized more easily than the configuration of the nineteenth embodiment.
- FIG. 27 is a circuit block diagram of a rectifier circuit device according to a twenty-first embodiment of the present disclosure.
- the difference between the present embodiment and the third embodiment is that a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 21, and the control circuit 11 is replaced with the control circuit 21.
- the calculation formula of the short circuit time ratio D is different.
- the method of using the harmonic extraction circuit 16 and the calculation formula for the short-time ratio D are the same as those in the nineteenth embodiment.
- the control circuit 21 outputs the polarity detection circuit 12 (polarity information), the DC voltage detection circuit 14 (DC voltage information), the current detection circuit 7 (current information), and the harmonic extraction circuit 16 (harmonic). Component information).
- the DC voltage control method and the phase adjustment method using information of the current detection circuit 7 are the same as those in the third embodiment.
- FIG. 28 is a circuit block diagram of a rectifier circuit device according to a twenty-second embodiment of the present disclosure.
- the nineteenth embodiment is configured by a separate circuit. Specifically, a harmonic is provided between the input voltage detection circuit 15 and the control circuit 11 as compared with the fourth embodiment. An extraction circuit 16 is added, and the control circuit 11 is replaced with a control circuit 21.
- the AC power source 1 is short-circuited through the reactor 2 using the semiconductor switch 3.
- the energy stored in the reactor 2 is sent to the smoothing capacitor 9 via the diodes 6a, 6b, 6c and 6d.
- the zero-cross detection circuit 13 is used as information on the input side of the rectifier circuit device. It is sufficient if the zero-cross information by and the harmonic component information contained in the input voltage by the harmonic extraction circuit 16 are available.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using information from the smoothing circuit 8 are the same as in the fourth embodiment.
- the zero cross information and the harmonic extraction circuit by the zero cross detection circuit 13 are used as information on the input side of the rectifier circuit device. It is sufficient if the harmonic component information contained in the input voltage by 16 is available.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using the information of the DC voltage detection circuit 14 are the same as in the fifth embodiment.
- FIG. 29 is a circuit block diagram of a rectifier circuit device according to the twenty-fourth embodiment.
- the present embodiment is configured by a circuit further different from the above-described twenty-second embodiment.
- the circuit between the input voltage detection circuit 15 and the control circuit 11 is different.
- a harmonic extraction circuit 16 is added, and the control circuit 11 is replaced with a control circuit 21.
- the AC power supply 1 is rectified by the diodes 6a, 6b, 6c, and 6d, and then short-circuited by the semiconductor switch 3 through the reactor 2.
- the energy stored in the reactor 2 is sent to the smoothing capacitor 9 via the diode 5.
- the information on the input side of the rectifier circuit device is zero cross information by the zero cross detection circuit 13 and the harmonic extraction circuit 16 as in the above-described twenty-second embodiment. It is sufficient if the harmonic component information contained in the input voltage is available.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using information from the current detection circuit 7 and the smoothing circuit 8 are the same as in the sixth embodiment.
- the current detection circuit 7 and the smoothing circuit 8 are omitted, and the information of the DC voltage detection circuit 14 is used.
- the same control as 20 is realized.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11, and the control circuit 11 is replaced with the control circuit 21.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the method of performing phase adjustment using information of the DC voltage detection circuit 14 are the same as in the seventh embodiment.
- FIG. 30 is a circuit block diagram of a rectifier circuit device according to the twenty-sixth embodiment.
- the current detection circuit 7 is moved to the AC side, and the smoothing circuit 8 is omitted.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11, and the control circuit 11 is replaced with the control circuit 21.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using information of the current detection circuit 7 are the same as in the eighth embodiment.
- FIG. 31 is a circuit block diagram of a rectifier circuit device according to the twenty-seventh embodiment.
- the current detection circuit 7 is moved to the AC side, and the smoothing circuit 8 is omitted.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11 with respect to the ninth embodiment, and the control circuit 11 is replaced with a control circuit 21.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using information of the current detection circuit 7 are the same as those in the ninth embodiment.
- FIG. 32 is a circuit block diagram of the rectifier circuit device according to the twenty-eighth embodiment.
- the current detection circuit 7 is moved into a loop constituted by the diodes 6a, 6b, 6c, 6d, the reactor 2, and the semiconductor switch 3 in the embodiment 24 described with reference to FIG. Is.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11 with respect to the tenth embodiment, and the control circuit 11 is replaced with a control circuit 21.
- Embodiment 27 the same control as that of Embodiment 27 can be realized.
- the operations of the control circuit 21 the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using the information of the current detection circuit 7 are the same as in the tenth embodiment.
- FIG. 33 is a circuit diagram of a rectifier circuit device according to a twenty-ninth embodiment of the present disclosure.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11 with respect to the eleventh embodiment, and the control circuit 11 is replaced with a control circuit 21.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using the information of the voltage detection circuit 19 are the same as those in the eleventh embodiment.
- 34A and 34B are waveform diagrams showing the operation of the present embodiment. Since this waveform diagram is also the same as the waveform diagrams shown in FIGS. 15A and 15B related to Embodiment 11, the description thereof is omitted.
- FIG. 35 is a circuit diagram illustrating a rectifier circuit device according to a thirtieth embodiment of the present disclosure.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11 with respect to the twelfth embodiment, and the control circuit 11 is replaced with a control circuit 21.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using the information of the voltage detection circuit 119 are the same as those in the twelfth embodiment.
- FIG. 36 is a circuit diagram illustrating a rectifier circuit device according to a thirty-first embodiment of the present disclosure.
- a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11 with respect to the thirteenth embodiment, and the control circuit 11 is replaced with a control circuit 21.
- the reactor 2 is directly connected to one end of the AC power source 1 as in the above-described FIG.
- the semiconductor switch 3 is connected between the output of the reactor 2 and the other end of the AC power source 1 and has a circuit configuration for directly short-circuiting the AC power source 1 and the reactor 2.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as those in the nineteenth embodiment.
- the DC voltage control method and the phase adjustment method using information from the voltage detection circuit 119 are the same as those in the thirteenth embodiment.
- FIG. 37 is based on the same basic circuit configuration as that of Embodiments 19, 20, and 21 shown in FIGS. 25, 26, and 27, respectively.
- FIG. 37 shows a state in which the terminal to which the reactor 2 is connected is a positive potential among the two output terminals of the AC power supply 1 in these circuit configurations described above. Since the operation in the state shown in FIG. 37 is the same as that of the fourteenth embodiment, detailed description thereof is omitted.
- the potential difference between both ends of the reactor 2 needs to be approximately a sine wave.
- Vpwm Since the voltage Vac at one end of the AC power supply 1 is a sine wave, the voltage Vpwm at the other end of the AC power supply 1 also needs to be approximately a sine wave. If voltage losses of the semiconductor switches 3a and 3b and the diodes 6b and 6c are sufficiently small and can be ignored, Vpwm is considered to be obtained by the following equation (3).
- Vpwm Vdc ⁇ A ⁇ sin ( ⁇ ) + Vac_harm ( ⁇ ) (12)
- the fundamental component of Vpwm cannot be said to be a sine wave as it is.
- the fundamental wave component of Vpwm is a sine wave.
- the coefficient A1 shown in the following formula (8) may be used instead of the coefficient A of the arithmetic expression used in the first embodiment, the second embodiment, and the eleventh embodiment.
- FIG. 19 is a waveform diagram for explaining the flow of this process.
- the actual DC voltage (Vdc) and the set DC voltage (Vdc *) are compared by the comparison circuit 201 to obtain a temporary coefficient A that is a result of temporary short-circuit time ratio adjustment. It is done.
- the readjustment circuit 202 performs the calculation of the above equation (8) using this temporary coefficient A, and readjusts the short-circuit time ratio D. In accordance with the driving pattern using the coefficient A1 obtained in this way, short-circuiting and opening by the semiconductor switch are performed.
- a coefficient A2 represented by the following equation (9) may be used as a method for simplifying instantaneous division. This method can also perform highly accurate correction.
- FIG. 20 is a waveform diagram illustrating the flow of this process, as in FIG. 20, the difference from FIG. 19 is that the readjustment circuit 207 performs the calculation of the above equation (9) and readjusts the short-circuit time ratio D. According to the drive pattern using the coefficient A2 obtained in this way, short-circuiting and opening by the semiconductor switch are performed.
- control circuit 21 in the nineteenth to thirteenth embodiments is the same as the contents described in the respective embodiments.
- the basic configuration of the present embodiment is the same as FIG. 25 used in the description of the nineteenth embodiment.
- the method for modulating the ON width by comparing the three points within the half cycle of the AC power supply is the same as in the fifteenth embodiment.
- the readjustment method of the short circuit time ratio D is the same as that in the thirty-second embodiment.
- the basic configuration of the present embodiment is the same as that of FIG. 26 used in the description of the twentieth embodiment.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as in the nineteenth embodiment.
- the DC voltage control method and the method of performing phase adjustment using information of the DC voltage detection circuit 14 are the same as those in the twentieth embodiment.
- the method for modulating the ON width by comparing two points in the first half or the second half of the half cycle of the AC power supply is the same as that in the sixteenth embodiment.
- the readjustment method of the short circuit time ratio D is the same as that in the thirty-second embodiment.
- the basic configuration of the present embodiment is the same as that of FIG. 27 used in the description of the twenty-first embodiment.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as in the nineteenth embodiment.
- the polarity detection circuit 12, the DC voltage detection circuit 14, the DC voltage control method, and the phase adjustment using the information of the current detection circuit 7 and the current detection circuit 7 are the same as in the twenty-first embodiment.
- the method for modulating the ON width by comparing the three points in the half cycle of the AC power supply is the same as that in the seventeenth embodiment.
- the method for readjustment of the short circuit time ratio is the same as that in the thirty-second embodiment.
- FIG. 38 is a circuit block diagram of the rectifier circuit device according to the present embodiment.
- the basic configuration of the present embodiment is the same as that of the eighteenth embodiment except that a harmonic extraction circuit 16 is added between the input voltage detection circuit 15 and the control circuit 11, and the control circuit 11 is replaced with a control circuit 21. is there.
- the method of using the harmonic extraction circuit 16 and the formula for calculating the short-time ratio D are the same as in the nineteenth embodiment.
- the DC voltage control method and the method of performing phase adjustment using information from the current transformer 70, the full-wave rectifier circuit 71, and the smoothing circuit 72 are the same as in the eighteenth embodiment.
- the method for modulating the ON width by comparing the three points in the half cycle of the AC power supply is the same as that in the seventeenth embodiment.
- the method for readjustment of the short circuit time ratio is the same as that in the thirty-second embodiment.
- each element in each embodiment is expressed as an electric circuit, but is not limited thereto, and may be configured by a microprocessor and software.
- the rectifier circuit device does not use a high-speed and high-accuracy current detection unit, and the accuracy of the inductance of the reactor is not ensured, the load fluctuation is large, or the input Even in the case where distortion is included in the power supply voltage, an arbitrary DC voltage can be output, and a rectifier circuit device having a high power factor and less power harmonics can be realized.
- the rectifier circuit device is a device that drives a DC load by converting a single-phase AC power source to DC, or by inversely converting once rectified DC power to AC power of an arbitrary frequency by an inverter circuit.
- the present invention is widely applied to devices that drive electric motors, for example, devices that perform cooling, heating, or freezing.
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Abstract
Description
D=1-A×fv(θ-β) (1)
制御回路がさらに、交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの電流値の差異に応じて式(1)における位相遅れβを調整し、検出された直流電圧と直流電圧の目標値との差異に応じて式(1)における係数Aを調整するように構成されたものである。 In the rectifier circuit device according to a seventh aspect of the present disclosure, in the sixth aspect, when the control circuit uses fv (θ) as input voltage information for each half cycle or one cycle detected from the voltage of the AC power supply, The short-circuit time ratio D in the vicinity of the electrical angle θ of the AC power supply is calculated using Equation (1),
D = 1−A × fv (θ−β) (1)
The control circuit further adjusts the phase delay β in equation (1) according to the difference between the two current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected DC voltage and DC voltage. The coefficient A in equation (1) is adjusted according to the difference from the target value.
A1=A/{1-(Vdc*―Vdc)/Vdc*} (8)
A2=A×{1+(Vdc*―Vdc)/Vdc*} (9)
式(8)における係数A1、または、式(9)における係数A2を用いて、短絡時間比率Dを計算するように構成されたものである。 The rectifier circuit device according to a ninth aspect of the present disclosure is the rectifier circuit apparatus according to the eighth aspect, in which the control circuit is
A1 = A / {1- (Vdc * −Vdc) / Vdc *} (8)
A2 = A × {1+ (Vdc * −Vdc) / Vdc *} (9)
The short circuit time ratio D is calculated using the coefficient A1 in the equation (8) or the coefficient A2 in the equation (9).
D=1-A×sin(θ-β)-Vac_harm(θ)÷Vdc (10)
制御回路がさらに、交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの電力値または電流値の差異に応じて式(10)における位相遅れβを調整し、検出された直流電圧と直流電圧の目標値との差異に応じて式(10)における係数Aを調整するように構成されたものである。 A rectifier circuit device according to a twelfth aspect of the present disclosure is the rectifier circuit device according to the tenth aspect, in which the control circuit has sin (θ) as the fundamental component of the voltage of the AC power supply, Vac_harm (θ) as the harmonic component, and DC voltage as the harmonic component. When Vdc, the short-circuit time ratio D of the drive pattern in the vicinity of the electrical angle θ of the AC power supply is calculated using the equation (10),
D = 1−A × sin (θ−β) −Vac_harm (θ) ÷ Vdc (10)
The control circuit further adjusts the phase delay β in Equation (10) according to the difference between the two power values or current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected DC voltage. And the coefficient A in the equation (10) are adjusted according to the difference between the DC voltage and the target value of the DC voltage.
図1は、本開示の実施の形態1に係る整流回路装置の回路ブロック図である。 (Embodiment 1)
FIG. 1 is a circuit block diagram of a rectifier circuit device according to the first embodiment of the present disclosure.
ここで、θは交流電源の電気角、fv(θ)は交流電源1の半周期または1周期の入力電圧情報、βは位相遅れを示す正の定数である。以下の説明において、fv(θ)は0以上の値とする。 D = 1−A × fv (θ−β) (1)
Here, θ is the electrical angle of the AC power supply, fv (θ) is the input voltage information of the half cycle or one cycle of the
式(2)において、係数Aは直流電圧と目標値との差異により調整され、位相遅れβは半周期毎の前半と後半とにおける電力の差異により調整される。なお、短絡時間比率Dは0以上かつ1以下の値であるため、右辺が1を超える場合には1、右辺が0より小さい場合には0に設定される。 Short-circuit time ratio D = 1−A × sin (θ−β) (2)
In equation (2), the coefficient A is adjusted by the difference between the DC voltage and the target value, and the phase delay β is adjusted by the difference in power between the first half and the second half every half cycle. Since the short-circuit time ratio D is a value not less than 0 and not more than 1, it is set to 1 when the right side exceeds 1, and set to 0 when the right side is smaller than 0.
図3Bは、式(1)に示す短絡時間比率Dを用いた場合の入力電圧および入力電流の波形図である。図3Bに示すように、入力電流は、入力電圧と同程度の歪みに抑えることができる。 D = 1−A × fv (θ−β) (1)
FIG. 3B is a waveform diagram of the input voltage and the input current when the short-circuit time ratio D shown in Expression (1) is used. As shown in FIG. 3B, the input current can be suppressed to the same distortion as the input voltage.
図4は、本開示の実施の形態2に係る整流回路装置の回路ブロック図である。図4の回路構成は、電流検出回路7が設けられていない以外、図1とほぼ同じである。 (Embodiment 2)
FIG. 4 is a circuit block diagram of a rectifier circuit device according to the second embodiment of the present disclosure. The circuit configuration of FIG. 4 is substantially the same as that of FIG. 1 except that the
図6は、本開示の実施の形態3に係る整流回路装置の回路ブロック図である。図6の回路構成は、電流検出回路7が交流電源1からの電流を直接検出できる位置に設けられる以外、図1とほぼ同じである。 (Embodiment 3)
FIG. 6 is a circuit block diagram of a rectifier circuit device according to the third embodiment of the present disclosure. The circuit configuration of FIG. 6 is substantially the same as that of FIG. 1 except that the
図9は、本開示の実施の形態4に係る整流回路装置の回路ブロック図である。本実施の形態は、実施の形態1を別の回路構成で設計したものである。実施の形態4における基本回路構成は、実施の形態1と同様、特許文献1に示されたものに入力電圧検出回路15を追加したものである。 (Embodiment 4)
FIG. 9 is a circuit block diagram of a rectifier circuit device according to the fourth embodiment of the present disclosure. In the present embodiment, the first embodiment is designed with a different circuit configuration. As in the first embodiment, the basic circuit configuration in the fourth embodiment is obtained by adding an input
次に、本開示の実施の形態5について説明する。本実施の形態は、図9に示した構成において、電流検出回路7および平滑回路8を省略し、直流電圧検出回路14の出力情報を用いて、前述の実施の形態2と同じ機能を実現するものである。 (Embodiment 5)
Next, a fifth embodiment of the present disclosure will be described. In this embodiment, in the configuration shown in FIG. 9, the
次に、本開示の実施の形態6について図10を用いて説明する。図10は、本開示の実施の形態6に係る整流回路装置の回路ブロック図である。本実施の形態は、前述の実施の形態とさらに異なる回路構成で設計したものである。基本回路構成は、特許文献3に示されたものに入力電圧検出回路15を追加したものである。 (Embodiment 6)
Next, a sixth embodiment of the present disclosure will be described with reference to FIG. FIG. 10 is a circuit block diagram of a rectifier circuit device according to the sixth embodiment of the present disclosure. This embodiment is designed with a circuit configuration further different from that of the above-described embodiment. The basic circuit configuration is obtained by adding an input
次に、本開示の実施の形態7について説明する。実施の形態7に係る整流回路装置は、図10を用いて説明した実施の形態6おける電流検出回路7および平滑回路8を省略して、直流電圧検出回路14の情報を用いるものである。これにより、実施の形態2と同じ機能を実現することができる。制御回路11の動作は半導体スイッチ3a及び半導体スイッチ3bの選択を除き実施の形態2と同じである。 (Embodiment 7)
Next, a seventh embodiment of the present disclosure will be described. In the rectifier circuit device according to the seventh embodiment, the
次に、本開示の実施の形態8について図11を用いて説明する。図11に示すように、本実施の形態は、図9を用いて説明した実施の形態4における電流検出回路7が交流側に移動し、平滑回路8が省略されたものである。制御回路11の動作は半導体スイッチ3a及び半導体スイッチ3bの選択を除き実施の形態3と同じである。 (Embodiment 8)
Next, an eighth embodiment of the present disclosure will be described with reference to FIG. As shown in FIG. 11, in the present embodiment, the
次に、本開示の実施の形態9について図12を用いて説明する。図12に示すように、本実施の形態は、図10を用いて説明した実施の形態6における電流検出回路7が交流側に移動し、平滑回路8が省略されたものである。制御回路11の動作は半導体スイッチ3a及び半導体スイッチ3bの選択を除き実施の形態3と同じである。 (Embodiment 9)
Next, a ninth embodiment of the present disclosure will be described with reference to FIG. As shown in FIG. 12, in this embodiment, the
次に、本開示の実施の形態10について図13を用いて説明する。図13は、実施の形態6における電流検出回路7を、ダイオード6a、6b、6c、6dとリアクタ2と半導体スイッチ3とで構成されるループの中に移動させたものである。本実施の形態によれば、実施の形態9と同じ機能を実現することができる。制御回路11の動作は半導体スイッチ3a及び半導体スイッチ3bの選択を除き実施の形態3と同じである。 (Embodiment 10)
Next, a tenth embodiment of the present disclosure will be described with reference to FIG. In FIG. 13, the
図14は、本開示の実施の形態11の整流回路装置の回路図である。 (Embodiment 11)
FIG. 14 is a circuit diagram of a rectifier circuit device according to an eleventh embodiment of the present disclosure.
式(2)において、係数Aは直流電圧と目標値との差異により調整され、位相遅れβは、交流電源1の瞬時電圧がゼロに戻った時に、リアクタ2に電流が流れているかどうかにより調整される。すなわち、リアクタ2に流れる電流が検出された場合には位相遅れβを小さくし、リアクタ2に流れる電流が検出されなかった場合には位相遅れβを大きくする。 Short-circuit time ratio D = 1−A × sin (θ−β) (2)
In equation (2), the coefficient A is adjusted by the difference between the DC voltage and the target value, and the phase delay β is adjusted by whether or not current flows through the
これにより、実施の形態1と同様に入力電流の歪みを、入力電圧と同程度の歪みに抑えることができる。 D = 1−A × fv (θ−β) (1)
Thereby, similarly to the first embodiment, the distortion of the input current can be suppressed to the same degree as the input voltage.
図16は、本開示の実施の形態12に係る整流回路装置の回路ブロック図である。 (Embodiment 12)
FIG. 16 is a circuit block diagram of a rectifier circuit device according to a twelfth embodiment of the present disclosure.
図17は、本開示の実施の形態13の整流回路装置を示す回路図である。 (Embodiment 13)
FIG. 17 is a circuit diagram illustrating a rectifier circuit device according to a thirteenth embodiment of the present disclosure.
次に、本開示の実施の形態14について図18を用いて説明する。図18は、図1、図4および図6にそれぞれ示した実施の形態1、2および3と同じ基本回路構成に基づくものである。これら前述の回路構成において、交流電源1の二つの出力端子のうち、リアクタ2が接続される端子がプラス電位になる期間の動作を説明する。 (Embodiment 14)
Next, a fourteenth embodiment of the present disclosure will be described with reference to FIG. FIG. 18 is based on the same basic circuit configuration as in the first, second and third embodiments shown in FIGS. 1, 4 and 6, respectively. In these circuit configurations described above, an operation during a period in which the terminal to which the
ここで、
D=1-A×sin(θ-β) (2)
であるので、
Vpwm=Vdc×A×sin(θ-β) (4)
となり、Vdcが一定値であれば、Vpwmの波形は正弦波になる。 Vpwm = Vdc × (1-D) (3)
here,
D = 1−A × sin (θ−β) (2)
So
Vpwm = Vdc × A × sin (θ−β) (4)
If Vdc is a constant value, the waveform of Vpwm is a sine wave.
Vpwm=Vdc×A×fv(θ-β) (5)
しかしながら、平滑コンデンサ9の容量は有限であるので、例えば、図5に示すように、直流電圧にはリップル成分が含まれる。このため、このままではVpwmは入力電圧情報のみが反映されたものではない。 D = 1−A × fv (θ−β) (1)
Vpwm = Vdc × A × fv (θ−β) (5)
However, since the capacity of the smoothing
Vpwm=Vdc×A×fv(θ―β)×{Vdc(av)÷Vdc} (6)
とすれば、
Vpwm=Vdc(av)×A×fv(θ―β) (7)
となり、Vpwmはリップル成分の影響が排除されたものになる。 In order to cope with this situation, using an instantaneous value (actual DC voltage) Vdc of the DC voltage and an average value Vdc (av) of the DC voltage,
Vpwm = Vdc × A × fv (θ−β) × {Vdc (av) ÷ Vdc} (6)
given that,
Vpwm = Vdc (av) × A × fv (θ−β) (7)
Thus, Vpwm is one in which the influence of the ripple component is eliminated.
=A×Vdc*÷Vdc (8)
図19は、この処理の流れを説明するための波形図である。図19において、図8と同様に、実直流電圧(Vdc)と設定直流電圧(Vdc*)とが比較回路201により比較され、暫定的な短絡時間比率の調整の結果である仮の係数Aが得られる。 A1 = A / {1- (Vdc * −Vdc) / Vdc *}
= A × Vdc * ÷ Vdc (8)
FIG. 19 is a waveform diagram for explaining the flow of this process. In FIG. 19, as in FIG. 8, the actual DC voltage (Vdc) and the set DC voltage (Vdc *) are compared by the
=A×{2-Vdc/Vdc*} (9)
図20は、図19と同様に、この処理の流れを説明する波形図である。図20において、図19との差異は、再調整回路207が上記式(9)の演算を行い、短絡時間比率Dを再調整することである。こうして得られた係数A2を用いた駆動パターンに応じて、半導体スイッチによる短絡および開放が行われる。 A2 = A × {1+ (Vdc * −Vdc) / Vdc *}
= A × {2-Vdc / Vdc *} (9)
FIG. 20 is a waveform diagram illustrating the flow of this process, as in FIG. 20, the difference from FIG. 19 is that the
次に、本開示の実施の形態15について説明する。本実施の形態の基本構成は実施の形態1の説明で用いた図1と同じである。以下、図21を用いて本実施の形態の動作を説明する。 (Embodiment 15)
Next, a fifteenth embodiment of the present disclosure will be described. The basic configuration of the present embodiment is the same as FIG. 1 used in the description of the first embodiment. Hereinafter, the operation of the present embodiment will be described with reference to FIG.
次に、本開示の実施の形態16について説明する。本実施の形態の基本構成は実施の形態2の説明で用いた図4と同じである。以下、図22を用いて本実施の形態の動作を説明する。 (Embodiment 16)
Next, an
次に、本開示の実施の形態17について説明する。本実施の形態の基本構成は実施の形態3の説明で用いた図6と同じである。以下、図23を用いて本実施の形態の動作を説明する。 (Embodiment 17)
Next, an embodiment 17 of the present disclosure will be described. The basic configuration of the present embodiment is the same as FIG. 6 used in the description of the third embodiment. Hereinafter, the operation of the present embodiment will be described with reference to FIG.
次に、本開示の実施の形態18について説明する。図24は、本実施の形態に係る整流回路装置の回路ブロック図である。図24の回路構成は、前述の図6の回路構成における電流検出回路7を、電流トランス70、全波整流回路71、平滑回路72に置き換えたものである。 (Embodiment 18)
Next, an eighteenth embodiment of the present disclosure will be described. FIG. 24 is a circuit block diagram of the rectifier circuit device according to the present embodiment. The circuit configuration in FIG. 24 is obtained by replacing the
図25は、本開示の実施の形態19に係る整流回路装置の回路ブロック図を示す。 (Embodiment 19)
FIG. 25 is a circuit block diagram of a rectifier circuit device according to a nineteenth embodiment of the present disclosure.
式(10)において、係数Aは直流電圧と目標値との差異により調整され、位相遅れβは半周期毎の前半と後半とにおける電力の差異により調整される。短絡時間比率Dは0以上かつ1以下の値であるため、右辺値が1を超える場合には1、右辺値が0より小さい場合には0に設定される。これにより、入力電流は歪みの無い波形となる。 D = 1−A × sin (θ−β) −Vac_harm (θ) ÷ Vdc (10)
In equation (10), the coefficient A is adjusted by the difference between the DC voltage and the target value, and the phase delay β is adjusted by the difference in power between the first half and the second half every half cycle. Since the short circuit time ratio D is a value of 0 or more and 1 or less, it is set to 1 when the right side value exceeds 1, and is set to 0 when the right side value is less than 0. As a result, the input current has a waveform without distortion.
図26は、本開示の実施の形態20に係る整流回路装置の回路ブロック図である。本実施の形態と実施の形態2との相違点は、入力電圧検出回路15と制御回路21との間に高調波抽出回路16が追加されていること、制御回路11を制御回路21に置き換えていること、短絡時間比率Dの計算式が異なることである。但し、高調波抽出回路16の使用方法及び短時間比率Dの計算式については、実施の形態19と同じである。 (Embodiment 20)
FIG. 26 is a circuit block diagram of a rectifier circuit device according to a twentieth embodiment of the present disclosure. The difference between the present embodiment and the second embodiment is that a
図27は、本開示の実施の形態21に係る整流回路装置の回路ブロック図である。本実施の形態と実施の形態3との相違点は、入力電圧検出回路15と制御回路21との間に高調波抽出回路16が追加されていること、制御回路11を制御回路21に置き換えていること、短絡時間比率Dの計算式が異なることである。但し、高調波抽出回路16の使用方法及び短時間比率Dの計算式については、実施の形態19と同じである。 (Embodiment 21)
FIG. 27 is a circuit block diagram of a rectifier circuit device according to a twenty-first embodiment of the present disclosure. The difference between the present embodiment and the third embodiment is that a
図28は、本開示の実施の形態22に係る整流回路装置の回路ブロック図である。本実施の形態は、実施の形態19を別の回路で構成されたものであり、具体的には、実施の形態4に対して、入力電圧検出回路15と制御回路11との間に高調波抽出回路16が追加され、制御回路11を制御回路21に置き換えたものである。 (Embodiment 22)
FIG. 28 is a circuit block diagram of a rectifier circuit device according to a twenty-second embodiment of the present disclosure. In the present embodiment, the nineteenth embodiment is configured by a separate circuit. Specifically, a harmonic is provided between the input
次に、本開示の実施の形態23について説明する。本実施の形態は、実施の形態22の説明で用いた図28に示した構成において、電流検出回路7および平滑回路8を省略し、直流電圧検出回路14の出力情報を用いて、前述の実施の形態20と同じ機能を実現するものである。具体的には、実施の形態5に対して、入力電圧検出回路15と制御回路11との間に高調波抽出回路16が追加され、制御回路11を制御回路21に置き換えたものである。 (Embodiment 23)
Next, a twenty-third embodiment of the present disclosure will be described. In the present embodiment, in the configuration shown in FIG. 28 used in the description of the twenty-second embodiment, the
次に、本開示の実施の形態24について図29を用いて説明する。図29は、実施の形態24に係る整流回路装置の回路ブロック図である。本実施の形態は、前述の実施の形態22とはさらに異なる回路で構成されたものであり、具体的には、実施の形態6に対して、入力電圧検出回路15と制御回路11との間に高調波抽出回路16が追加され、制御回路11を制御回路21に置き換えたものである。 (Embodiment 24)
Next, a twenty-fourth embodiment of the present disclosure will be described with reference to FIG. FIG. 29 is a circuit block diagram of a rectifier circuit device according to the twenty-fourth embodiment. The present embodiment is configured by a circuit further different from the above-described twenty-second embodiment. Specifically, in contrast to the sixth embodiment, the circuit between the input
次に、本開示の実施の形態25について説明する。 (Embodiment 25)
Next, an embodiment 25 of the present disclosure will be described.
次に、本開示の実施の形態26について図30を用いて説明する。図30は、実施の形態26に係る整流回路装置の回路ブロック図である。本実施の形態は、図28を用いて説明した実施の形態22の構成において、電流検出回路7を交流側に移動させ、平滑回路8を省略したものである。 (Embodiment 26)
Next, an embodiment 26 of the present disclosure will be described with reference to FIG. FIG. 30 is a circuit block diagram of a rectifier circuit device according to the twenty-sixth embodiment. In the present embodiment, in the configuration of the twenty-second embodiment described with reference to FIG. 28, the
次に、本開示の実施の形態27について図31を用いて説明する。図31は、実施の形態27に係る整流回路装置の回路ブロック図である。本実施の形態は、図29を用いて説明した実施の形態24の構成において、電流検出回路7を交流側に移動させ、平滑回路8を省略したものである。 (Embodiment 27)
Next, an embodiment 27 of the present disclosure will be described with reference to FIG. FIG. 31 is a circuit block diagram of a rectifier circuit device according to the twenty-seventh embodiment. In the present embodiment, in the configuration of the twenty-fourth embodiment described with reference to FIG. 29, the
次に、本開示の実施の形態28について図32を用いて説明する。図32は、実施の形態28に係る整流回路装置の回路ブロック図である。 (Embodiment 28)
Next, an embodiment 28 of the present disclosure will be described with reference to FIG. FIG. 32 is a circuit block diagram of the rectifier circuit device according to the twenty-eighth embodiment.
図33は、本開示の実施の形態29に係る整流回路装置の回路図である。本実施の形態は、実施の形態11に対して、入力電圧検出回路15と制御回路11との間に高調波抽出回路16が追加され、制御回路11を制御回路21に置き換えたものである。 (Embodiment 29)
FIG. 33 is a circuit diagram of a rectifier circuit device according to a twenty-ninth embodiment of the present disclosure. In the present embodiment, a
図35は、本開示の実施の形態30の整流回路装置を示す回路図である。 Embodiment 30
FIG. 35 is a circuit diagram illustrating a rectifier circuit device according to a thirtieth embodiment of the present disclosure.
図36は、本開示の実施の形態31の整流回路装置を示す回路図である。 (Embodiment 31)
FIG. 36 is a circuit diagram illustrating a rectifier circuit device according to a thirty-first embodiment of the present disclosure.
次に、本開示の実施の形態32について説明する。図37を用いて本実施の形態の原理を説明する。図37は、図25、図26および図27にそれぞれ示した実施の形態19、20および21と同じ基本回路構成に基づくものである。 (Embodiment 32)
Next, an embodiment 32 of the present disclosure will be described. The principle of this embodiment will be described with reference to FIG. FIG. 37 is based on the same basic circuit configuration as that of
ここで、
D=1-A×sin(θ-β) (2)
であるので、
Vpwm=Vdc×A×sin(θ-β) (4)
となり、Vdcが一定値であれば、Vpwmの波形は正弦波になる。 Vpwm = Vdc × (1-D) (3)
here,
D = 1−A × sin (θ−β) (2)
So
Vpwm = Vdc × A × sin (θ−β) (4)
If Vdc is a constant value, the waveform of Vpwm is a sine wave.
Vpwm=Vdc×A×sin(θ-β)+Vac_harm(θ) (12)
しかしながら、平滑コンデンサ9の容量は有限であるので、実施の形態14で説明したように、直流電圧Vdcにはリップル成分が含まれる。このため、このままではVpwmの基本波成分は正弦波とは言えない。 D = 1−A × sin (θ−β) −Vac_harm (θ) / Vdc (11)
Vpwm = Vdc × A × sin (θ−β) + Vac_harm (θ) (12)
However, since the capacity of the smoothing
Vpwm={Vdc×A×sin(θ―β)+Vac_harm(θ)}
×{Vdc(av)÷Vdc} (13)
とすれば、
Vpwm=Vdc(av)×A×sin(θ―β)
+{Vdc(av)÷Vdc}×Vac_harm(θ) (14)
となり、Vpwmの基本波成分は正弦波になる。 In order to cope with this situation, using the instantaneous value Vdc of the DC voltage and the average value Vdc (av) of the DC voltage,
Vpwm = {Vdc × A × sin (θ−β) + Vac_harm (θ)}
× {Vdc (av) ÷ Vdc} (13)
given that,
Vpwm = Vdc (av) × A × sin (θ−β)
+ {Vdc (av) ÷ Vdc} × Vac_harm (θ) (14)
Thus, the fundamental wave component of Vpwm is a sine wave.
=A×Vdc*÷Vdc (8)
図19は、この処理の流れを説明するための波形図である。図19において、図8と同様に、実直流電圧(Vdc)と設定直流電圧(Vdc*)とが比較回路201により比較され、暫定的な短絡時間比率調整の結果である仮の係数Aが得られる。 A1 = A / {1- (Vdc * −Vdc) / Vdc *}
= A × Vdc * ÷ Vdc (8)
FIG. 19 is a waveform diagram for explaining the flow of this process. In FIG. 19, as in FIG. 8, the actual DC voltage (Vdc) and the set DC voltage (Vdc *) are compared by the
=A×{2-Vdc/Vdc*} (9)
図20は、図19と同様に、この処理の流れを説明する波形図である。図20において、図19との差異は、再調整回路207が上記式(9)の演算を行い、短絡時間比率Dを再調整することである。こうして得られた係数A2を用いた駆動パターンに応じて、半導体スイッチによる短絡および開放が行われる。 A2 = A × {1+ (Vdc * −Vdc) / Vdc *}
= A × {2-Vdc / Vdc *} (9)
FIG. 20 is a waveform diagram illustrating the flow of this process, as in FIG. 20, the difference from FIG. 19 is that the
次に、本開示の実施の形態33について説明する。 (Embodiment 33)
Next, a thirty-third embodiment of the present disclosure will be described.
次に、本開示の実施の形態34について説明する。 (Embodiment 34)
Next, an embodiment 34 of the present disclosure will be described.
次に、本開示の実施の形態35について説明する。 (Embodiment 35)
Next, a thirty-fifth embodiment of the present disclosure will be described.
次に、本開示の実施の形態36について図38を用いて説明する。図38は、本実施の形態に係る整流回路装置の回路ブロック図である。 Embodiment 36
Next, a thirty-sixth embodiment of the present disclosure will be described with reference to FIG. FIG. 38 is a circuit block diagram of the rectifier circuit device according to the present embodiment.
2,102 リアクタ
3,3a,3b,103 半導体スイッチ
5,6a,6b,6c,6d,105,106a,106b,106c,106d ダイオード
6,106 ダイオードブリッジ
7 電流検出回路
8 平滑回路
9,109 平滑コンデンサ
10,110 負荷
11,21,111 制御回路
12 極性検出回路
13 ゼロクロス検出回路
14 直流電圧検出回路
15 入力電圧検出回路
16 高調波抽出回路
19,119 電圧検出回路
70 電流トランス
71 全波整流回路
72 平滑回路
107 電流検出手段
113 ゼロクロス検出手段
115 電圧検出手段
201 比較回路
202,207 再調整回路 DESCRIPTION OF SYMBOLS 1,101 AC power source 2,102
Claims (14)
- リアクタと半導体スイッチとを用いた力率改善機能を有し、交流電源を整流して直流側に直流電圧を出力する整流回路装置であって、
前記半導体スイッチを制御する制御回路と、
前記交流電源の電圧の極性またはゼロクロスを検出する回路と、
前記交流電源の電圧を検出する入力電圧検出回路と、
前記交流電源から流れる電流を検出する電流検出回路と、
前記直流電圧を検出する直流電圧検出回路と、
を備え、
前記制御回路は、前記極性または前記ゼロクロスに応じて前記交流電源の電圧の位相を推定し、前記交流電源の電圧と前記位相とに関連付けられた半周期毎または1周期毎の入力電圧情報に基づいた駆動パターンに応じて前記半導体スイッチを制御し、
前記制御回路はさらに、前記交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの前記直流側の電流量が近づくように、前記駆動パターンと前記交流電源の電圧との位相関係を調整するように構成された整流回路装置。 A rectifier circuit device having a power factor improvement function using a reactor and a semiconductor switch, rectifying an AC power source and outputting a DC voltage to a DC side,
A control circuit for controlling the semiconductor switch;
A circuit for detecting the polarity or zero crossing of the voltage of the AC power supply;
An input voltage detection circuit for detecting the voltage of the AC power supply;
A current detection circuit for detecting a current flowing from the AC power supply;
A DC voltage detection circuit for detecting the DC voltage;
With
The control circuit estimates the phase of the voltage of the AC power supply according to the polarity or the zero cross, and is based on the input voltage information for each half cycle or each cycle associated with the voltage of the AC power supply and the phase. Controlling the semiconductor switch according to the driving pattern,
The control circuit further adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the two DC current amounts detected in the first half and the second half of each half cycle of the AC power supply approach each other. A rectifier circuit device configured to adjust. - リアクタと半導体スイッチとを用いた力率改善機能を有し、交流電源を整流して直流側に直流電圧を出力する整流回路装置であって、
前記半導体スイッチを制御する制御回路と、
前記交流電源の電圧の極性またはゼロクロスを検出する回路と、
前記交流電源の電圧を検出する入力電圧検出回路と、
前記直流電圧を検出する直流電圧検出回路と、
を備え、
前記制御回路は、前記極性または前記ゼロクロスに応じて前記交流電源の電圧の位相を推定し、前記交流電源の電圧と前記位相とに関連付けられた半周期毎または1周期毎の入力電圧情報に基づいた駆動パターンに応じて前記半導体スイッチを制御し、
前記制御回路はさらに、前記交流電源の半周期以上の期間における平均直流電圧と、前記交流電源の瞬時電圧のピーク位相における前記直流電圧とが近づくように、前記駆動パターンと交流電源の電圧との位相関係を調整するように構成された整流回路装置。 A rectifier circuit device having a power factor improvement function using a reactor and a semiconductor switch, rectifying an AC power source and outputting a DC voltage to a DC side,
A control circuit for controlling the semiconductor switch;
A circuit for detecting the polarity or zero crossing of the voltage of the AC power supply;
An input voltage detection circuit for detecting the voltage of the AC power supply;
A DC voltage detection circuit for detecting the DC voltage;
With
The control circuit estimates the phase of the voltage of the AC power supply according to the polarity or the zero cross, and is based on the input voltage information for each half cycle or each cycle associated with the voltage of the AC power supply and the phase. Controlling the semiconductor switch according to the driving pattern,
The control circuit further includes the drive pattern and the voltage of the AC power supply so that the average DC voltage in a period of a half cycle or more of the AC power supply approaches the DC voltage in the peak phase of the instantaneous voltage of the AC power supply. A rectifier circuit device configured to adjust a phase relationship. - リアクタと半導体スイッチとを用いた力率改善機能を有し、交流電源を整流して直流側に直流電圧を出力する整流回路装置であって、
前記半導体スイッチを制御する制御回路と、
前記交流電源の電圧の極性またはゼロクロスを検出する回路と、
前記交流電源の電圧を検出する入力電圧検出回路と、
前記直流側の電力を検出するために、前記直流側の電圧を検出する直流電圧検出回路および前記直流側の電流を検出する電流検出回路と、
を備え、
前記制御回路はさらに、前記極性または前記ゼロクロスに応じて前記交流電源の電圧の位相を推定し、前記交流電源の電圧と前記位相とに関連付けられた半周期毎または1周期毎の入力電圧情報に基づいた駆動パターンに応じて前記半導体スイッチを制御し、
前記制御回路は、前記交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの前記直流側の電力量が近づくように、前記駆動パターンと前記交流電源の電圧との位相関係を調整するように構成された整流回路装置。 A rectifier circuit device having a power factor improvement function using a reactor and a semiconductor switch, rectifying an AC power source and outputting a DC voltage to a DC side,
A control circuit for controlling the semiconductor switch;
A circuit for detecting the polarity or zero crossing of the voltage of the AC power supply;
An input voltage detection circuit for detecting the voltage of the AC power supply;
A DC voltage detection circuit for detecting the DC side voltage and a current detection circuit for detecting the DC side current in order to detect the DC side power;
With
The control circuit further estimates the phase of the voltage of the AC power supply according to the polarity or the zero cross, and inputs the input voltage information for each half cycle or one cycle associated with the voltage of the AC power supply and the phase. Controlling the semiconductor switch according to the driving pattern based on
The control circuit adjusts the phase relationship between the drive pattern and the voltage of the AC power supply so that the two DC power amounts detected in the first half and the second half of each half cycle of the AC power supply approach each other. A rectifier circuit device configured to: - リアクタと半導体スイッチとを用いた力率改善機能を有し、交流電源を整流して直流側に直流電圧を出力する整流回路装置であって、
前記半導体スイッチを制御する制御回路と、
前記交流電源の電圧の極性またはゼロクロスを検出する回路と、
前記交流電源の電圧を検出する入力電圧検出回路と、
前記直流電圧を検出する直流電圧検出回路と、
前記リアクタに流れる電流の有無を検出する回路と、
を備え、
前記制御回路は、前記極性または前記ゼロクロスに応じて前記交流電源の電圧の位相を推定し、前記交流電源の電圧と前記位相とに関連付けられた半周期毎または1周期毎の入力電圧情報に基づいた駆動パターンに応じて前記半導体スイッチを制御し、
前記制御回路はさらに、前記交流電源の瞬時電圧がゼロになる時点の前後において、前記駆動パターンの位相を、前記リアクタに流れる電流が検出された場合には前記交流電源の電圧に対して進め、前記リアクタに流れる電流が検出されなかった場合には前記交流電源の電圧に対して遅らせるように構成された整流回路装置。 A rectifier circuit device having a power factor improvement function using a reactor and a semiconductor switch, rectifying an AC power source and outputting a DC voltage to a DC side,
A control circuit for controlling the semiconductor switch;
A circuit for detecting the polarity or zero crossing of the voltage of the AC power supply;
An input voltage detection circuit for detecting the voltage of the AC power supply;
A DC voltage detection circuit for detecting the DC voltage;
A circuit for detecting the presence or absence of current flowing in the reactor;
With
The control circuit estimates the phase of the voltage of the AC power supply according to the polarity or the zero cross, and is based on the input voltage information for each half cycle or each cycle associated with the voltage of the AC power supply and the phase. Controlling the semiconductor switch according to the driving pattern,
The control circuit further advances the phase of the drive pattern before and after the moment when the instantaneous voltage of the AC power supply becomes zero, when the current flowing through the reactor is detected, with respect to the voltage of the AC power supply, A rectifier circuit device configured to be delayed with respect to the voltage of the AC power supply when a current flowing through the reactor is not detected. - 前記リアクタに流れる電流の有無を検出する回路は、前記リアクタの前記整流回路装置の出力側に接続されたダイオードの少なくとも一つが前記整流回路装置の出力側と導通状態であるかどうかにより検出する請求項4に記載の整流回路装置。 The circuit for detecting the presence or absence of current flowing through the reactor detects whether or not at least one of the diodes connected to the output side of the rectifier circuit device of the reactor is in conduction with the output side of the rectifier circuit device. Item 5. The rectifier circuit device according to Item 4.
- 前記制御回路は、検出された前記直流電圧を目標値に近づけるよう、前記駆動パターンの短絡時間比率を調整するように構成された請求項1に記載の整流回路装置。 The rectifier circuit device according to claim 1, wherein the control circuit is configured to adjust a short-circuit time ratio of the drive pattern so that the detected DC voltage approaches a target value.
- 前記制御回路は、前記交流電源の電圧から検出した半周期または1周期毎の入力電圧情報をfv(θ)とした場合、前記交流電源の電気角θの近傍における前記短絡時間比率Dを、式(1)を用いて計算し、
D=1-A×fv(θ-β) (1)
前記制御回路はさらに、前記交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの電流値の差異に応じて、前記式(1)における位相遅れβを調整し、検出された前記直流電圧と前記直流電圧の目標値との差異に応じて、前記式(1)における係数Aを調整するように構成された請求項6に記載の整流回路装置。 The control circuit is configured to calculate the short-circuit time ratio D in the vicinity of the electrical angle θ of the AC power supply when fv (θ) is input voltage information for each half cycle or one cycle detected from the voltage of the AC power supply. Calculate using (1)
D = 1−A × fv (θ−β) (1)
The control circuit further adjusts the phase delay β in the equation (1) according to the difference between the two current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected The rectifier circuit device according to claim 6, wherein the rectifier circuit device is configured to adjust the coefficient A in the equation (1) according to a difference between a DC voltage and a target value of the DC voltage. - 前記制御回路は、検出された前記直流電圧と前記直流電圧の目標値との比により、前記短絡時間比率を再調整するように構成された請求項7に記載の整流回路装置。 The rectifier circuit device according to claim 7, wherein the control circuit is configured to readjust the short-circuit time ratio based on a ratio between the detected DC voltage and a target value of the DC voltage.
- 前記制御回路は、前記式(1)における係数Aの代わりに、
A1=A/{1-(Vdc*―Vdc)/Vdc*} (8)
A2=A×{1+(Vdc*―Vdc)/Vdc*} (9)
式(8)における係数A1、または、式(9)における係数A2を用いて、前記短絡時間比率Dを計算するように構成された請求項8に記載の整流回路装置。 The control circuit, instead of the coefficient A in the equation (1),
A1 = A / {1- (Vdc * −Vdc) / Vdc *} (8)
A2 = A × {1+ (Vdc * −Vdc) / Vdc *} (9)
The rectifier circuit device according to claim 8, wherein the short-circuiting time ratio D is calculated using the coefficient A1 in the equation (8) or the coefficient A2 in the equation (9). - リアクタと半導体スイッチとを用いた力率改善機能を有し、交流電源を整流して直流側に直流電圧を出力する整流回路装置であって、
前記半導体スイッチを制御する制御回路と、
前記交流電源の電圧の極性またはゼロクロスを検出する回路と、
前記交流電源の電圧を検出する入力電圧検出回路と、
前記入力電圧検出回路の出力信号から基本波成分を除く成分または任意の高調波成分を抽出する高調波抽出回路と、
を備え、
前記制御回路は、前記極性または前記ゼロクロスに応じて前記交流電源の電圧の位相を推定し、前記位相に基づいた基本パターンに前記高調波抽出回路により抽出された成分を付加して得られた駆動パターンに応じて前記半導体スイッチを制御し、
前記制御回路はさらに、前記基本パターンと前記交流電源の電圧との位相関係を調整するように構成された整流回路装置。 A rectifier circuit device having a power factor improvement function using a reactor and a semiconductor switch, rectifying an AC power source and outputting a DC voltage to a DC side,
A control circuit for controlling the semiconductor switch;
A circuit for detecting the polarity or zero crossing of the voltage of the AC power supply;
An input voltage detection circuit for detecting the voltage of the AC power supply;
A harmonic extraction circuit that extracts a component excluding the fundamental wave component or an arbitrary harmonic component from the output signal of the input voltage detection circuit;
With
The control circuit estimates the phase of the voltage of the AC power supply according to the polarity or the zero cross, and the drive obtained by adding the component extracted by the harmonic extraction circuit to the basic pattern based on the phase Control the semiconductor switch according to the pattern,
The control circuit is a rectifier circuit device configured to further adjust a phase relationship between the basic pattern and the voltage of the AC power supply. - 前記制御回路は、検出された前記直流電圧を目標値に近づけるよう、前記駆動パターンの短絡時間比率を調整するように構成された請求項10に記載の整流回路装置。 The rectifier circuit device according to claim 10, wherein the control circuit is configured to adjust a short-circuit time ratio of the drive pattern so that the detected DC voltage approaches a target value.
- 前記制御回路は、前記交流電源の電圧の基本波成分をsin(θ)、高調波成分をVac_harm(θ)、直流電圧をVdcとした場合、前記交流電源の電気角θ近傍における前記駆動パターンの短絡時間比率Dを、式(10)を用いて計算し、
D=1-A×sin(θ-β)-Vac_harm(θ)÷Vdc (10)
前記制御回路はさらに、前記交流電源の半周期毎の前半と後半とにおいてそれぞれ検出された二つの電流値の差異に応じて前記式(10)における位相遅れβを調整し、検出された直流電圧と直流電圧の目標値との差異に応じて前記式(10)における係数Aを調整するように構成された請求項10に記載の整流回路装置。 When the fundamental component of the voltage of the AC power supply is sin (θ), the harmonic component is Vac_harm (θ), and the DC voltage is Vdc, the control circuit has the drive pattern near the electrical angle θ of the AC power supply. The short circuit time ratio D is calculated using equation (10),
D = 1−A × sin (θ−β) −Vac_harm (θ) ÷ Vdc (10)
The control circuit further adjusts the phase delay β in the equation (10) according to the difference between the two current values detected in the first half and the second half of each half cycle of the AC power supply, and detects the detected DC voltage. The rectifier circuit device according to claim 10, wherein the coefficient A in the equation (10) is adjusted according to a difference between the current value and a target value of the DC voltage. - 前記制御回路は、前記交流電源の半周期の序盤と中盤と終盤とにおいて検出された電力量または電流量が所定の範囲に入るように、前記駆動パターンを調整するように構成された請求項1に記載の整流回路装置。 The control circuit is configured to adjust the drive pattern so that the amount of electric power or the amount of current detected at the beginning, middle, and end of the half cycle of the AC power supply falls within a predetermined range. The rectifier circuit device described in 1.
- 前記制御回路は、前記交流電源の半周期内における前記直流電圧の波形が左右対称となるように、前記駆動パターンを調整するように構成された請求項1に記載の整流回路装置。 2. The rectifier circuit device according to claim 1, wherein the control circuit is configured to adjust the drive pattern so that a waveform of the DC voltage in a half cycle of the AC power supply is symmetrical.
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KR20200015017A (en) * | 2018-08-02 | 2020-02-12 | 엘지전자 주식회사 | Power converting apparatus and home appliance including the same |
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