WO2009147985A1 - コンデンサ回路および電力変換回路 - Google Patents
コンデンサ回路および電力変換回路 Download PDFInfo
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- WO2009147985A1 WO2009147985A1 PCT/JP2009/059736 JP2009059736W WO2009147985A1 WO 2009147985 A1 WO2009147985 A1 WO 2009147985A1 JP 2009059736 W JP2009059736 W JP 2009059736W WO 2009147985 A1 WO2009147985 A1 WO 2009147985A1
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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
- H02M1/14—Arrangements for reducing ripples from dc input or output
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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
- H02M1/4266—Arrangements for improving power factor of AC input using passive elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- the present invention relates to a capacitor circuit formed by connecting a plurality of capacitor lines each connected to a capacitor in parallel, and more particularly to a capacitor circuit used as a smoothing capacitor circuit of a power conversion circuit for converting AC power and DC power. is there.
- An inverter circuit is used as a circuit for supplying AC power to a motor in an electric vehicle or a hybrid vehicle.
- the inverter circuit generally includes a battery that is a DC power source, a conversion circuit that converts DC power into AC power, and a smoothing capacitor circuit that is connected between the battery and the conversion circuit (for example, a patent). Reference 1).
- condenser used for a smoothing capacitor circuit the film capacitor
- the allowable ripple current per unit volume or unit capacitance is limited by the operating temperature. For this reason, in a large current system such as in-vehicle and under severe usage environment (operating temperature, etc.) as an electronic component, in order to satisfy the condition of allowable ripple current as an inverter circuit, the capacitance more than necessary for a smoothing circuit is required. Capacitance must be secured. For this reason, a capacitor circuit in which the film capacitor itself is enlarged or a plurality of film capacitors are connected in parallel is used. Therefore, a conventional capacitor circuit module using only a film capacitor has a large casing.
- FIG. 11 is an equivalent circuit diagram of a smoothing capacitor circuit in which a plurality of capacitors are connected in parallel.
- the smoothing capacitor circuit 101 has a structure in which a film capacitor 111 and a ceramic capacitor 112 are connected in parallel.
- the film capacitor 111 has a capacitance C111 and has characteristics of an equivalent series resistance (ESR) R111 and an equivalent series inductance (ESL) L111.
- the ceramic capacitor 112 has a capacitance C112 and has characteristics of an equivalent series resistance (ESR) R112 and an equivalent series inductance (ESL) L112.
- FIG. 12A is a diagram showing the frequency characteristics of the impedance of the film capacitor 111 side circuit and the ceramic capacitor 112 side circuit as shown in FIG. 11 and the frequency characteristics of the composite impedance of the capacitor circuit 101, respectively.
- 12B is a diagram showing frequency characteristics of the current of the film capacitor 111 side circuit and the current of the ceramic capacitor 112 side circuit when an external current having an effective value of 1A is applied to the capacitor circuit 101.
- FIG. 13A shows the frequency spectrum of the current in the film capacitor 111 side circuit
- FIG. 13B shows the frequency spectrum of the current in the ceramic capacitor 112 side circuit.
- the simulations whose results are shown in FIGS. 12 and 13 were performed under the following conditions.
- the capacitance C111 of the film capacitor 111 is 1160 ⁇ F
- the series resistance component R111 is 0.75 m ⁇
- the series inductance component L111 is 20 nH.
- the capacitance C112 of the ceramic capacitor 112 is 40 ⁇ F
- the series resistance component R112 is 2 m ⁇
- the series inductance component L112 is 2 nH.
- an alternating current of 1 kHz to 10 MHz with an effective value of 1 A was applied from the constant current source to the capacitor circuit 101 having such element parameters.
- the film capacitor 111 and the ceramic capacitor 112 have different impedance frequency characteristics.
- the parallel resonance frequency component of the ripple current is amplified, and the current value in FIG. 12B and the spectrum of 100 kHz to 200 kHz in FIG. As shown in FIG. For this reason, the film capacitor is heated by the overcurrent of the parallel resonance frequency component, and as a result, the allowable ripple current is reduced as a smoothing capacitor circuit.
- An object of the present invention is to realize a capacitor circuit that can prevent parallel resonance by a plurality of capacitors as constituent elements and can substantially increase resistance to an unnecessary high-frequency current from the outside, such as an increase in allowable ripple current. is there.
- the present invention relates to a capacitor circuit in which a first capacitor line including a first capacitor and a second capacitor line having different electrical characteristics from the first capacitor line including a second capacitor are connected in parallel.
- the capacitor circuit includes a first capacitor line and a second capacitor so that the resonance frequency adjusting means causes the first series resonance frequency of the first capacitor line and the second series resonance frequency of the second capacitor line to coincide with each other at a specific frequency. Adjust the reactance of at least one of the lines.
- the reactance of at least one of the first capacitor line and the second capacitor line connected in parallel changes, and the series resonance frequency of the two lines coincides with a specific frequency.
- the resonance frequency due to the inductive reactance and the capacitive reactance in the closed circuit composed of two lines matches the series resonance frequency of each line, so that the first capacitor line and the second capacitor line No resonance current is generated.
- the impedance of each line at a specific frequency is equivalent to the pure resistance component.
- the specific frequency component of the unnecessary high frequency signal flowing from the outside is divided according to the ratio of the pure resistance component of each line.
- the specific frequency to the frequency having the maximum current value in the frequency band of the inflowing high-frequency signal, the frequency that becomes the maximum current value in the high-frequency signal, that is, the allowable current value as the capacitor circuit is the most.
- a shunt is performed at an influencing frequency.
- the impedance of the first capacitor line at a specific frequency higher than the impedance of the second capacitor line at a specific frequency, more shunt signals of the specific frequency are supplied to the second capacitor line than the first capacitor line.
- the high-frequency signal that flows and flows through the first capacitor can be more effectively suppressed, and heat generation at the first capacitor can be suppressed.
- FIG. 1 is an equivalent circuit diagram of the capacitor circuit 1 of the present embodiment.
- the capacitor circuit 1 of the present embodiment is a so-called smoothing capacitor circuit that is connected in parallel between a DC power supply in the inverter circuit and a switching circuit.
- the capacitor circuit 1 includes a first capacitor line 14 having a film capacitor 11 corresponding to the first capacitor of the present invention and a ceramic capacitor 12 corresponding to the second capacitor of the present invention.
- Two capacitor lines 15 are connected in parallel.
- the first capacitor line 14 is made of a line conductor to which a film capacitor 11 and an external electrode of the film capacitor 11 are connected.
- the film capacitor 11 has a structure in which an organic insulating material such as polypropylene is used as a dielectric, has a predetermined capacitance C11, and has characteristics of having a series resistance component (ESR) R11 and a series inductance component (ESL) L11. Become. With such a configuration, the first capacitor line 14 has a series resonance frequency f14 based on the capacitance C11 of the film capacitor 11 and the series inductance component L11.
- the second capacitor line 15 is composed of a line conductor in which the ceramic capacitor 12 and the external electrode of the ceramic capacitor 12 are connected.
- An inductance element 13 having a predetermined inductance L13 is inserted into the line conductor.
- This inductance element 13 corresponds to the resonance frequency adjusting means of the present invention. That is, the second capacitor line 15 includes a circuit in which the ceramic capacitor 12 and the inductance element 13 are connected in series.
- the ceramic capacitor 12 has a structure in which a ceramic material is used as a dielectric, has a predetermined capacitance C12, and has characteristics of having a series resistance component (ESR) R12 and a series inductance component (ESL) L12. With such a configuration, the second capacitor line 15 has a series resonance frequency f15 based on the capacitance C12 of the ceramic capacitor 12, the series inductance component L12, and the inductance L13 of the inductance element 13.
- ESR series resistance component
- ESL series inductance component
- the inductance L13 of the inductance element 13 is set to a value at which the series resonance frequency f14 of the first capacitor line 14 and the series resonance frequency f15 of the second capacitor line 15 coincide.
- Such a configuration can prevent parallel resonance between the first capacitor line 14 and the second capacitor line 15, that is, between the film capacitor 11 and the ceramic capacitor 12.
- the simulations whose results are shown in FIGS. 2 and 3 were performed under the following conditions.
- the capacitance C11 of the film capacitor 11 is 1160 ⁇ F
- the series resistance component R11 is 0.75 m ⁇
- the series inductance component L11 is 20 nH.
- the electrostatic capacitance C12 of the ceramic capacitor 12 is 40 ⁇ F
- the series resistance component R12 is 2 m ⁇
- the series inductance component L12 is 2 nH.
- the inductance L13 of the inductance element 13 is 578 nH.
- a high frequency current of 1 kHz to 10 MHz with an effective value of 1 A was applied from the constant current source to the capacitor circuit 1 having such element parameters.
- FIG. 2A is a diagram showing the impedance characteristics of the first capacitor line 14 (film capacitor) and the second capacitor line 15 (ceramic capacitor) shown in FIG. 1 and the combined impedance characteristics of the capacitor circuit 1.
- FIG. 2B is a diagram showing the current of the first capacitor line 14 (film capacitor) and the current of the second capacitor line 15 (ceramic capacitor) when an external current having an effective value of 1A is applied to the capacitor circuit 1. is there.
- 3A shows the frequency spectrum of the current in the first capacitor line 14, and FIG. 3B shows the frequency spectrum of the current in the second capacitor line 15.
- the series resonance frequency of the first capacitor line 14 and the second capacitor line 15 The series resonance frequency matches.
- the resonance frequency due to the inductive reactance and the capacitive reactance in the closed circuit composed of two lines matches the series resonance frequency of each line, so that the first capacitor line and the second capacitor line No resonance current is generated. That is, an overcurrent in the vicinity of 200 kHz as shown in FIG. 12B of the prior art does not occur as shown in FIG. Therefore, as can be seen from the frequency spectrum shown in FIG. 3, the spectrum standing in the vicinity of 200 kHz as shown in FIG. 13 is suppressed.
- the impedance of the first capacitor line 14 and the second capacitor line 15 is only a pure resistance component.
- the current flowing through the first capacitor line 14 at the resonance frequency and the current flowing through the second capacitor line 15 are inversely proportional to the ratio of the pure resistance components of the lines 14 and 15.
- the impedance of the first capacitor line 14 and the impedance of the second capacitor line 15 are closer than the other frequency bands due to the characteristics of the combination of these capacitors.
- the current flowing only in the first capacitor line 14 in the other frequency band is shunted to the second capacitor line 15 in the frequency range centered on the resonance frequency. Therefore, since the current value flowing into the film capacitor 11 can be suppressed at the resonance frequency, the allowable ripple current at the resonance frequency can be further increased.
- FIG. 4 is an equivalent circuit diagram of the capacitor circuit 2 of the present embodiment.
- a first capacitor line 24 having a film capacitor 21 and a second capacitor line 25 having a ceramic capacitor 22 are arranged in parallel as in the first embodiment. Become connected.
- the first capacitor line 24 is made of a line conductor to which the film capacitor 21 and the external electrode of the film capacitor 21 are connected.
- An inductance element 231 having a predetermined inductance L231 is inserted into the line conductor. That is, the first capacitor line 24 includes a circuit in which the film capacitor 21 and the inductance element 231 are connected in series.
- the film capacitor 21 has a predetermined capacitance C21, and has characteristics of having a series resistance component (ESR) R21 and a series inductance component (ESL) L21. With such a configuration, the first capacitor line 24 has a series resonance frequency f24 based on the capacitance C21 of the film capacitor 21, the series inductance component L21, and the inductance L231 of the inductance element 231.
- the second capacitor line 25 is made of a line conductor in which a ceramic capacitor 22 and an external electrode of the ceramic capacitor 22 are connected.
- An inductance element 232 having a predetermined inductance L232 is inserted into the line conductor. That is, the second capacitor line 25 includes a circuit in which the ceramic capacitor 22 and the inductance element 232 are connected in series.
- the ceramic capacitor 22 has a characteristic of having a predetermined capacitance C22, a series resistance component (ESR) R22, and a series inductance component (ESL) L22.
- the inductance L231 of the inductance element 231 and the inductance L232 of the inductance element 232 are such that the series resonance frequency f24 of the first capacitor line 24 and the series resonance frequency f25 of the second capacitor line 25 match at the specific frequency f0. Is set to a value.
- the specific frequency f0 is set to a frequency at which a current value in a ripple current having a predetermined bandwidth flowing into the capacitor circuit 2 from the outside becomes maximum.
- the film capacitor 21 and the ceramic capacitor 22 are the same as the film capacitor 11 and the ceramic capacitor 12 shown in the simulation of the first embodiment.
- the inductance L231 of the inductance element 231 connected in series with the film capacitor 21 was 34.6 nH
- the inductance L232 of the inductance element 232 connected in series with the ceramic capacitor 22 was 1581 nH.
- a high-frequency current of 1 kHz to 10 MHz with an effective value of 1 A was applied from the constant current source to the capacitor circuit 2 having such element parameters as in the first embodiment.
- FIG. 5A is a diagram showing the impedance characteristics of the first capacitor line 24 (film capacitor) and the second capacitor line 25 (ceramic capacitor) shown in FIG. 4 and the combined impedance characteristics of the capacitor circuit 2.
- FIG. 5B is a diagram showing the current of the first capacitor line 24 (film capacitor) and the current of the second capacitor line 25 (ceramic capacitor) when an external current having an effective value of 1A is applied to the capacitor circuit 2. is there.
- FIG. 6A shows the frequency spectrum of the current in the first capacitor line 24, and FIG. 6B shows the frequency spectrum of the current in the second capacitor line 25.
- the first and second capacitor lines 24, 24, 24, The 25 series resonance frequencies can be frequency shifted simultaneously.
- the resonance frequency due to the inductive reactance and the capacitive reactance in the closed circuit composed of two lines matches the series resonance frequency of each line, so that the first capacitor line and the second capacitor line No resonance current is generated. That is, an overcurrent in the vicinity of 200 kHz as shown in FIG. 12B of the prior art does not occur as shown in FIG. Therefore, as can be seen from the frequency spectrum shown in FIG. 6, the spectrum standing in the vicinity of 200 kHz as shown in FIG. 13 of the prior art is suppressed.
- the ripple current is shunted to the second capacitor line 25 at the frequency f0 at which the ripple current is maximum. For this reason, as shown in FIG. 6 compared with FIG. 3, the amount of current flowing into the film capacitor 21 at a frequency f0 (20 kHz) having a high current value can be suppressed. At this time, the shunted current flows to the ceramic capacitor 22, but the ceramic capacitor 22 has higher heat resistance than the film capacitor 21, and the allowable ripple current is also high. Can be tolerated. In this way, the allowable ripple current is more effectively achieved as the capacitor circuit 2 by suppressing the current flowing through the film capacitor 21 and diverting it to the ceramic capacitor 22 at the frequency of the maximum current value that most affects the allowable ripple current. Can be high.
- FIG. 7 is an equivalent circuit diagram of the capacitor circuit 3 of the present embodiment.
- the capacitor circuit 3 of this embodiment includes a first capacitor line 34 having a film capacitor 31 and a second capacitor line 35 having a ceramic capacitor 32, as in the first and second embodiments. Are connected in parallel.
- the capacitor circuit 3 of the present embodiment is obtained by connecting a resistor element 333 in series to a first capacitor line 34 to which a film capacitor 31 is connected to the capacitor circuit 2 shown in the second embodiment.
- the configuration is the same as that of the capacitor circuit 2 of the second embodiment shown in FIG.
- This resistance element 333 corresponds to the impedance adjusting means of the present invention.
- the resistance element 333 is a resistor made of, for example, discrete components, and has a characteristic of a resistance value R333.
- the resistance value R333 may be realized by changing the shape of the line conductor.
- the resistance value R333 is set so that the impedance of the second capacitor line 35 in the predetermined frequency band near the specific frequency f0 is lower than the impedance of the first capacitor line 34.
- the resistance value R333 is set such that the impedance of the second capacitor line 35 at the specific frequency f0 is significantly lower (for example, one digit or two digits or more) than the impedance of the first capacitor line 34. .
- the capacitor circuit 3 is divided into the ceramic capacitor 32 by further greatly suppressing the current flowing through the film capacitor 31 at the frequency of the maximum current value that has the most influence on the allowable ripple current.
- the allowable ripple current can be increased more effectively than in the above configuration. Even if a current flows through the first capacitor line 34, it is consumed by the resistance element 333, so that the film capacitor 31 can be prevented from generating heat.
- FIG. 8A is a diagram showing the impedance characteristics of the first capacitor line 34 (film capacitor) and the second capacitor line 35 (ceramic capacitor) shown in FIG. 7 and the combined impedance characteristics of the capacitor circuit 3.
- FIG. 8B is a diagram showing the current of the first capacitor line 34 (film capacitor) and the current of the second capacitor line 35 (ceramic capacitor) when an external current having an effective value of 1A is applied to the capacitor circuit 5. is there.
- FIG. 9A shows the frequency spectrum of the current in the first capacitor line 34
- FIG. 9B shows the frequency spectrum of the current in the second capacitor line 35.
- the impedance of the second capacitor line 35 at the specific frequency f0 is lower than the impedance of the first capacitor line 34. can do. For this reason, as shown in FIG. 8A, the impedance of the second capacitor line 35 becomes lower at the specific frequency f0. As a result, as shown in FIG. 8B, the magnitude relationship between the current values of the first capacitor line 34 and the second capacitor line 35 is reversed in the vicinity of the specific frequency f0, and almost all of the current values at the specific frequency f0. Current flows to the second capacitor line 35.
- the ceramic capacitor 32 has a higher allowable ripple current and higher heat resistance than the film capacitor 31, and therefore, the ripple current flowing into the capacitor circuit 3. Even if all the current flows, the heat generated in the film capacitor 21 can be allowed without any problem.
- the capacitor circuit 3 allows the allowable ripple current to be reduced by greatly suppressing the current flowing through the film capacitor 31 at the frequency having the maximum current value that most affects the allowable ripple current and flowing only through the ceramic capacitor 32. Further, it can be effectively increased.
- FIG. 10 is a block diagram showing a circuit configuration of the inverter circuit 5 of the present embodiment.
- the inverter circuit 5 includes a DC power source 51 made of a battery or the like, a switching circuit 53, and a smoothing capacitor circuit 52 made of the capacitor circuit shown in each of the above embodiments.
- the smoothing capacitor circuit 52 is connected in parallel to the connection line 500 between the DC power supply 51 and the switching circuit 53.
- the switching circuit 53 is composed of a group of semiconductor switches, for example, PWM controlled by a control unit (not shown) to convert DC power into AC power, and outputs three-phase AC to a motor (not shown).
- an inverter circuit having a high allowable ripple current can be configured without increasing the size.
- a snubber capacitor can be connected in parallel to the input side of the switching circuit 53 of the inverter circuit 5.
- a third capacitor line including a snubber capacitor is connected in parallel to the first capacitor line including the film capacitor and the second capacitor line including the ceramic capacitor. Also good.
- the capacitor circuit can be configured by integrating the smoothing capacitor circuit and the snubber capacitor.
- an inverter circuit that converts DC power to AC power is shown as an example.
- a circuit that converts AC power to DC power is shown in the first to third embodiments. If the capacitor circuit is installed on the DC power side of the conversion circuit, the above-described effect can be obtained. Similarly, the capacitor circuit shown in the above-described embodiment can also be used in a DC-DC converter or the like that converts DC power into other DC power.
- an inductor element is inserted into a capacitor line and connected in series to the capacitor.
- an inductor may be formed depending on the shape of the line conductor.
- the electrical characteristics of the film capacitor or the ceramic capacitor itself is not changed.
- the electrical characteristics of the film capacitor or the ceramic capacitor for example, a series inductance component (ESL), a series resistance, or the like.
- ESL series inductance component
- the component (ESR) may be changed, or the capacitance of the ceramic capacitor may be changed.
- the adjustment is completed simply by replacing a capacitor with known characteristics, and the shape adjustment of the line conductor can be eliminated or reduced.
- the case where there is one each of the first capacitor line including the film capacitor and the second capacitor line including the ceramic capacitor is shown, but there may be a plurality of these.
- the inductance, capacitance, and resistance value may be adjusted for each capacitor line.
- the smoothing capacitor circuit used for the inverter circuit is shown as an example. However, if the capacitor circuit is affected by the unnecessary high-frequency signal when a large current unnecessary high-frequency signal flows in from the outside, The above-described configuration can be applied.
- 1,2,3,101-capacitor circuit 11,21,31,111-film capacitor, 12,22,32,112-ceramic capacitor, 13,231,232,331,332-inductance element, 333-resistance element 14, 24, 34-first capacitor line, 15, 25, 35-second capacitor line, 51-DC power supply, 52-smoothing capacitor circuit, 53-switching circuit
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Abstract
Description
図11に示すように、平滑用のコンデンサ回路101は、フィルムコンデンサ111とセラミックコンデンサ112とを並列接続する構造からなる。ここで、フィルムコンデンサ111は、静電容量C111を有し、等価直列抵抗(ESR)R111、等価直列インダクタンス(ESL)L111の特性を有する。セラミックコンデンサ112は、静電容量C112を有し、等価直列抵抗(ESR)R112、等価直列インダクタンス(ESL)L112の特性を有する。
図12(A)は、図11に示したようなフィルムコンデンサ111側回路とセラミックコンデンサ112側回路のそれぞれインピーダンスの周波数特性と、コンデンサ回路101の合成インピーダンスの周波数特性とを示す図であり、図12(B)はコンデンサ回路101に実効値1Aの外部電流を印加した場合のフィルムコンデンサ111側回路の電流およびセラミックコンデンサ112側回路の電流の周波数特性を示した図である。
また、図13(A)はフィルムコンデンサ111側回路の電流の周波数スペクトルを示し、図13(B)はセラミックコンデンサ112側回路の電流の周波数スペクトルを示した図である。
図12(A)に示すように、フィルムコンデンサ111とセラミックコンデンサ112とは、インピーダンスの周波数特性が異なる。このように、インピーダンスの周波数特性が異なるコンデンサ同士を並列接続した場合、2つのラインで構成される閉回路内の誘導性リアクタンスの大きさと容量性リアクタンスの大きさとが一致することにより、並列共振が発生する。例えば、図12であれば、200kHz付近で並列共振が発生する。そして、この並列共振周波数と各ラインの直列共振周波数とが異なるため、2つのコンデンサの並列回路からなる閉回路中で循環する共振電流が発生する。
図1は本実施形態のコンデンサ回路1の等価回路図である。
本実施形態のコンデンサ回路1は、インバータ回路内の直流電源とスイッチング回路との間に並列接続された、所謂平滑用のコンデンサ回路である。
図2(A)は、図1に示した第1コンデンサライン14(フィルムコンデンサ)および第2コンデンサライン15(セラミックコンデンサ)のそれぞれインピーダンス特性と、コンデンサ回路1の合成インピーダンス特性とを示す図であり、図2(B)はコンデンサ回路1に実効値1Aの外部電流を印加した場合の第1コンデンサライン14(フィルムコンデンサ)の電流および第2コンデンサライン15(セラミックコンデンサ)の電流を示した図である。また、図3(A)は第1コンデンサライン14の電流の周波数スペクトルを示し、図3(B)は第2コンデンサライン15の電流の周波数スペクトルを示した図である。
図4は本実施形態のコンデンサ回路2の等価回路図である。
図4に示すように、本実施形態のコンデンサ回路2は、第1の実施形態と同様に、フィルムコンデンサ21を有する第1コンデンサライン24と、セラミックコンデンサ22を有する第2コンデンサライン25とが並列接続されてなる。
図5(A)は、図4に示した第1コンデンサライン24(フィルムコンデンサ)および第2コンデンサライン25(セラミックコンデンサ)のそれぞれインピーダンス特性と、コンデンサ回路2の合成インピーダンス特性とを示す図であり、図5(B)はコンデンサ回路2に実効値1Aの外部電流を印加した場合の第1コンデンサライン24(フィルムコンデンサ)の電流および第2コンデンサライン25(セラミックコンデンサ)の電流を示した図である。また、図6(A)は第1コンデンサライン24の電流の周波数スペクトルを示し、図6(B)は第2コンデンサライン25の電流の周波数スペクトルを示した図である。
図7は本実施形態のコンデンサ回路3の等価回路図である。
図7に示すように、本実施形態のコンデンサ回路3は、第1、第2の実施形態と同様に、フィルムコンデンサ31を有する第1コンデンサライン34と、セラミックコンデンサ32を有する第2コンデンサライン35とが並列接続されてなる。
図10は本実施形態のインバータ回路5の回路構成を示すブロック図である。
図10に示すように、インバータ回路5は、バッテリ等からなる直流電源51と、スイッチング回路53と、上述の各実施形態に示したコンデンサ回路からなる平滑コンデンサ回路52とを備える。平滑コンデンサ回路52は、直流電源51とスイッチング回路53との接続ライン500に対して並列に接続される。
Claims (9)
- 第1のコンデンサを含む第1コンデンサラインと、第2のコンデンサを含む前記第1のコンデンサラインと異なる電気的特性を有する第2コンデンサラインとが、並列接続されたコンデンサ回路であって、
前記第1コンデンサラインの第1直列共振周波数と前記第2コンデンサラインの第2直列共振周波数とを特定周波数で一致させるように、前記第1コンデンサラインと前記第2コンデンサラインの少なくとも一方のリアクタンスを調整する共振周波数調整手段を備えた、コンデンサ回路。 - 前記特定周波数は、流入する高周波信号の周波数帯域における最大電流値を有する周波数に設定されている、請求項1に記載のコンデンサ回路。
- 前記共振周波数調整手段は、前記第1コンデンサラインおよび前記第2コンデンサラインの少なくとも一方に挿入されたインダクタンス素子である、請求項1または請求項2に記載のコンデンサ回路。
- 前記共振周波数調整手段は、前記第1のコンデンサおよび前記第2のコンデンサの少なくとも一方の内部インダクタンスを調整することで前記リアクタンスを調整する、請求項1~請求項3のいずれかに記載のコンデンサ回路。
- 前記特定周波数での前記第1コンデンサラインのインピーダンスを、前記特定周波数での前記第2コンデンサラインのインピーダンスよりも高くする、インピーダンス調整手段を備えた請求項1~請求項4のいずれかに記載のコンデンサ回路。
- 前記インピーダンス調整手段は、前記第1のコンデンサに直列接続する抵抗素子である請求項5に記載のコンデンサ回路。
- 前記第1のコンデンサと前記第2のコンデンサとは、異なる電気特性を有するコンデンサである請求項1~請求項6のいずれかに記載のコンデンサ回路。
- 前記第1のコンデンサはフィルムコンデンサであり、前記第2のコンデンサはセラミックコンデンサである請求項7に記載のコンデンサ回路。
- 直流電力を交流電力に変換するかもしくは交流電力を直流電力に変換する交流直流変換回路、または直流電力を他の直流電力に変換する直流変換回路を備え、
該交流直流変換回路の直流電力側または前記直流変換回路の少なくとも一方の直流電力側に、請求項1~請求項8のいずれかに記載のコンデンサ回路が接続された電力変換回路。
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CN200980120284.5A CN102047550B (zh) | 2008-06-03 | 2009-05-28 | 电容器电路和电力变换电路 |
JP2010515842A JP5559048B2 (ja) | 2008-06-03 | 2009-05-28 | コンデンサ回路および電力変換回路 |
US12/958,477 US8531850B2 (en) | 2008-06-03 | 2010-12-02 | Capacitor circuit and power conversion circuit including a resonant frequency adjustment element |
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JP2008145241 | 2008-06-03 | ||
JP2008-145241 | 2008-06-03 |
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US12/958,477 Continuation US8531850B2 (en) | 2008-06-03 | 2010-12-02 | Capacitor circuit and power conversion circuit including a resonant frequency adjustment element |
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WO2009147985A1 true WO2009147985A1 (ja) | 2009-12-10 |
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PCT/JP2009/059736 WO2009147985A1 (ja) | 2008-06-03 | 2009-05-28 | コンデンサ回路および電力変換回路 |
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US (1) | US8531850B2 (ja) |
JP (1) | JP5559048B2 (ja) |
CN (1) | CN102047550B (ja) |
WO (1) | WO2009147985A1 (ja) |
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JPWO2016103496A1 (ja) * | 2014-12-26 | 2017-09-14 | 日産自動車株式会社 | 電力変換装置 |
JP2020092556A (ja) * | 2018-12-07 | 2020-06-11 | 株式会社ダイヘン | 電力変換装置 |
JP2021013291A (ja) * | 2019-07-05 | 2021-02-04 | パナソニックIpマネジメント株式会社 | 電力変換装置 |
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US10355611B2 (en) * | 2014-12-22 | 2019-07-16 | Flex Power Control, Inc. | Multi-functional power management system |
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CN106329896A (zh) * | 2015-06-18 | 2017-01-11 | 鸿富锦精密工业(武汉)有限公司 | 直流电源电路 |
JP2017143647A (ja) * | 2016-02-10 | 2017-08-17 | 株式会社日立製作所 | 電力変換機装置 |
DE102016224472A1 (de) * | 2016-12-08 | 2018-06-14 | Audi Ag | Stromrichtereinrichtung für ein Kraftfahrzeug und Kraftfahrzeug |
DE102017110608A1 (de) * | 2017-05-16 | 2018-11-22 | Valeo Siemens Eautomotive Germany Gmbh | Inverter |
CN107257235A (zh) * | 2017-06-06 | 2017-10-17 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | 一种消除电容器寄生参数的低通滤波电桥 |
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Also Published As
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JP5559048B2 (ja) | 2014-07-23 |
JPWO2009147985A1 (ja) | 2011-10-27 |
CN102047550B (zh) | 2014-04-30 |
US8531850B2 (en) | 2013-09-10 |
CN102047550A (zh) | 2011-05-04 |
US20110292686A1 (en) | 2011-12-01 |
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