JP2005245118A - Electric device provided with inverter circuit - Google Patents

Electric device provided with inverter circuit Download PDF

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JP2005245118A
JP2005245118A JP2004050965A JP2004050965A JP2005245118A JP 2005245118 A JP2005245118 A JP 2005245118A JP 2004050965 A JP2004050965 A JP 2004050965A JP 2004050965 A JP2004050965 A JP 2004050965A JP 2005245118 A JP2005245118 A JP 2005245118A
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circuit
electric device
phase coil
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Akinori Nishizawa
昭則 西沢
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric device provided with an inverter circuit that suppresses common mode noise generated from the inverter circuit. <P>SOLUTION: In the electric device provided with the inverter circuit, each phase coil of the input side and each phase coil of the output side are wound on a common magnetic circuit being isolated from each other. Each phase coil of the input side is connected in series to an input circuit of the electric device, each phase coil of the output side is connected in the direction of forming magnetic field opposite to the direction of the magnetic field caused by each phase coil of the input side against a noise current in the output direction from the inverter circuit, and a reversed phase common mode choke is arranged that is connected in series to the input and output circuits of the electric device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明はインバータ装置や無停電電源装置などのインバータ回路を備えた電気装置に関するものである。   The present invention relates to an electric device including an inverter circuit such as an inverter device or an uninterruptible power supply device.

交流電源から入力された交流電圧をスイッチング素子により直流に変換し、変換した直流をスイッチング素子で所望の周波数、電圧の交流電圧に変換するインバータ回路を備えた電気装置においては、スイッチング素子（ＩＧＢＴなど）の動作に伴い、伝導性ノイズ、放射性ノイズが発生するものであり、このノイズが他の機器への障害とならないようにノイズフィルタが搭載されている。
インバータ回路を備えた電気装置にノイズフィルタを搭載した例として、例えば特許文献１に示されたものがある。
特許文献１は、交流電圧をスイッチング素子により直流に変換する整流器と、変換した直流をスイッチング素子により所望の周波数・電圧の交流電圧に変換する逆変換器と、直流部分に蓄電池が接続された無停電電源装置に関するものであり、共通の磁気回路に互いに絶縁された二つのコイルが巻回され、一方のコイルが交流電源から無停電電源装置に入力される入力回路に直列接続され、他方のコイルが逆変換器から負荷に出力される出力回路に、インバータ回路から出力する方向のノイズ電流に対して、上記入力回路に直列接続された一方のコイルが作る磁界の方向と同一方向になるように接続されたコモンモードチョークが入力回路と出力回路に跨って配置された構成である。 In an electric device including an inverter circuit that converts an alternating voltage input from an alternating current power source into a direct current with a switching element and converts the converted direct current into an alternating voltage with a desired frequency and voltage with the switching element, the switching element (such as an IGBT) ), Conductive noise and radioactive noise are generated, and a noise filter is mounted so that this noise does not interfere with other devices.
As an example in which a noise filter is mounted on an electric device provided with an inverter circuit, there is one disclosed in Patent Document 1, for example.
Patent Document 1 discloses a rectifier that converts an alternating voltage into a direct current using a switching element, an inverse converter that converts the converted direct current into an alternating voltage of a desired frequency and voltage, and a storage battery connected to a direct current portion. It relates to a power failure power supply, and two coils that are insulated from each other are wound around a common magnetic circuit, and one coil is connected in series to an input circuit that is input from an AC power source to the uninterruptible power supply, and the other coil In the output circuit that is output from the inverter to the load, the noise current in the direction that is output from the inverter circuit is the same as the direction of the magnetic field created by one coil connected in series to the input circuit. The connected common mode choke is arranged across the input circuit and the output circuit.

このようにコモンモードチョークを入力回路および出力回路に跨って配置して直列接続すると、無停電電源装置の内部で対アース間に発生したノイズは、コモンモードチョークによって、入力側および出力側のコイルが互いに反対側のコイルにノイズ電流に対応する逆位相の電圧を発生させて相殺し、外部に漏洩することが抑制されるものである。   If the common mode choke is placed across the input circuit and output circuit and connected in series in this way, the noise generated between the uninterruptible power supply and the ground is connected to the coil on the input and output sides by the common mode choke. Are offset by generating opposite-phase voltages corresponding to the noise currents in the coils opposite to each other, and leakage to the outside is suppressed.

特開平１１−９８７１６号公報JP-A-11-98716

上記特許文献１のインバータ回路を備えた電気装置である無停電電源装置では、入力回路および出力回路に跨って共通の磁気回路を持つコモンモードチョークを直列接続したことにより、インバータ回路から見て外部に漏洩するノイズが抑制される効果を有するものであるが、インバータ回路→負荷→接地部→交流電源→インバータ回路というようなループモードのノイズに対しては入力回路と出力回路には同相のノイズ電圧となるので、抑制できないという問題点があった。   In the uninterruptible power supply device that is an electric device provided with the inverter circuit of Patent Document 1, the common mode choke having a common magnetic circuit straddling the input circuit and the output circuit is connected in series, so that it is externally viewed from the inverter circuit. The noise that leaks to the input circuit and the output circuit is the same in the input circuit and the output circuit against the noise in the loop mode such as inverter circuit → load → grounding part → AC power supply → inverter circuit. Since it becomes a voltage, there was a problem that it could not be suppressed.

この発明は、上記問題点を解決するためになされたものであり、インバータ回路から発生する伝導性、放射性ノイズの主要因となっているのは「インバータ回路→負荷→接地部→交流電源→インバータ回路」のループモードのコモンモード電流であり、このコモンモード電流の抑制が少ないコア数で実現できるインバータ回路を備えた電気装置を提供することを目的とする。   The present invention has been made to solve the above-mentioned problems, and the main factor of conductivity and radiated noise generated from the inverter circuit is “inverter circuit → load → grounding part → AC power source → inverter”. An object of the present invention is to provide an electric device including an inverter circuit that is a common mode current of a loop mode of a circuit and can be realized with a small number of cores that suppresses the common mode current.

この発明に係るインバータ回路を備えた電気装置は、交流電圧をスイッチング素子により直流に変換し、変換した直流をスイッチング素子で所望の周波数および電圧の交流電圧に変換するインバータ回路を備えた電気装置であって、共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、入力側の各相コイルは電気装置の入力回路に直列接続され、出力側の各相コイルは、インバータ回路から出力する方向のノイズ電流に対して、入力側の各相コイルによる磁界の方向とは逆方向の磁界となる方向として電気装置の出力回路に直列接続された逆相コモンモードチョークが配置されたものである。   An electric device including an inverter circuit according to the present invention is an electric device including an inverter circuit that converts an alternating voltage into a direct current using a switching element and converts the converted direct current into an alternating voltage having a desired frequency and voltage. Each phase coil on the input side and each phase coil on the output side are insulated and wound around a common magnetic circuit, and each phase coil on the input side is connected in series to the input circuit of the electric device, and the output side Each of the phase coils is connected in series to the output circuit of the electric device as a direction in which the magnetic field in the direction opposite to the direction of the magnetic field by each phase coil on the input side is against the noise current in the direction of output from the inverter circuit. Phase common mode choke is arranged.

この発明によれば、インバータ回路から発生する伝導性、放射性ノイズの主要因となっている「インバータ回路→負荷→接地部→交流電源→インバータ回路」のループモードのコモンモード電流が抑制され、入力回路および出力回路に個別にチョークやコンデンサを設けて抑制する構成に比較して少ないコア数でループモードが抑制され、ループモードノイズの減衰効果が得られるインバータ回路を備えた電気装置が安価に構成できる。   According to this invention, the common mode current in the loop mode of “inverter circuit → load → grounding part → AC power source → inverter circuit”, which is the main factor of conductivity and radiated noise generated from the inverter circuit, is suppressed, and the input Low cost configuration of an electric device equipped with an inverter circuit that can suppress the loop mode with a small number of cores and provide an attenuation effect of loop mode noise compared to a configuration in which chokes and capacitors are individually provided in the circuit and the output circuit. it can.

実施の形態１．
図１は実施の形態１の交流電圧を所望の周波数、電圧の交流電圧に変換するインバータ回路を備えた電気装置の構成を示すブロック図である。
この構成は、交流電圧を直流に変換し、変換された直流を所望の周波数、電圧の交流電圧に変換するインバータ回路１と、交流電源３から交流電圧をインバータ回路１に入力する入力回路２と、インバータ回路１から負荷５に所望の周波数，電圧の交流電圧を負荷５に出力する出力回路４と、共通の磁気回路に入力側の各相コイルと、出力側の各相コイルが互いに絶縁されて巻回され、入力側各相コイルと出力側各相コイルは、インバータ回路から出力する方向のノイズ電流に対して、互いに逆方向の磁界を発生するように接続された逆相コモンモードチョーク６とを備えたものである。 Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of an electric device including an inverter circuit that converts the AC voltage of Embodiment 1 into an AC voltage having a desired frequency and voltage.
This configuration includes an inverter circuit 1 that converts an AC voltage into a DC voltage, converts the converted DC voltage into an AC voltage having a desired frequency and voltage, and an input circuit 2 that inputs an AC voltage from an AC power source 3 to the inverter circuit 1. The output circuit 4 that outputs an AC voltage of a desired frequency and voltage from the inverter circuit 1 to the load 5 to the load 5, the phase coils on the input side, and the phase coils on the output side are insulated from each other by a common magnetic circuit. The anti-phase common mode choke 6 is connected to generate a magnetic field in the opposite direction to the noise current in the direction of output from the inverter circuit. It is equipped with.

このようにインバータ回路を備えた電気装置を構成すると、インバータ回路１で発生するコモンモードノイズは、出力回路４を通って負荷５に流れ込み、負荷５と対接地部間のインピーダンスを介して接地部に流れ込む。接地部に流れ込んだコモンモードノイズは入力回路２の対接地部間のインピーダンスを介して入力回路２に流れ込み、ノイズの発生元であるインバータ回路に帰還する。即ち、「インバータ回路→負荷→接地部→交流電源→インバータ回路」のループモードの経路で伝播する。
逆相コモンモードチョーク６は入力側コイルと出力側コイルは、逆相に巻回されているので、「インバータ回路→負荷→接地部→交流電源→インバータ回路」のループモードのコモンモードノイズに対して抑制効果がある。 When the electric device including the inverter circuit is configured as described above, the common mode noise generated in the inverter circuit 1 flows into the load 5 through the output circuit 4 and is connected to the grounding unit via the impedance between the load 5 and the grounding unit. Flow into. The common mode noise that has flowed into the ground portion flows into the input circuit 2 via the impedance between the ground portion of the input circuit 2 and returns to the inverter circuit that is the source of the noise. That is, it propagates in a loop mode path of “inverter circuit → load → grounding part → AC power source → inverter circuit”.
Since the negative side common mode choke 6 has the input side coil and the output side coil wound in the reverse phase, it is against the common mode noise of the loop mode of “inverter circuit → load → grounding part → AC power source → inverter circuit”. And has an inhibitory effect.

入力回路と出力回路に跨って逆相コモンモードを直列配置したことにより、ループモードのコモンモードノイズを抑制するために、入力回路、出力回路のそれぞれにチョ−クを配置して対策する場合よりも、チョークの数が少なくなり電気装置として安価に構成できる。   In order to suppress common mode noise in the loop mode by arranging the anti-phase common mode in series across the input circuit and the output circuit, it is better than arranging a choke in each of the input circuit and output circuit. However, the number of chokes is reduced, and the electric device can be constructed at low cost.

実施の形態２．
実施の形態２の構成を図２に示す。実施の形態２は、実施の形態１の逆相コモンモードチョーク６を備えた構成に、同相コモンモードチョークを付加したものである。
図２構成のインバータ回路１、入力回路２、交流電源３、出力回路４、負荷５は実施の形態１の図１と同一であり、これに入力回路２と出力回路に跨って同相コモンモードチョーク７を付加したものである。 Embodiment 2. FIG.
The configuration of the second embodiment is shown in FIG. In the second embodiment, a common-phase common mode choke is added to the configuration including the negative-phase common mode choke 6 of the first embodiment.
The inverter circuit 1, input circuit 2, AC power supply 3, output circuit 4, and load 5 configured in FIG. 2 are the same as those in FIG. 1 of the first embodiment. 7 is added.

インバータ回路１から発生するコモンモードノイズは、実施の形態１で説明したループモードのコモンモードノイズの他に、インバータ回路１から見て入力回路２と出力回路４に同相で発生するダイポール（共振）モードのコモンモードノイズも発生する。
同相コモンモードチョ−ク７は共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、入力側の各相コイルは電気装置の入力回路２に直列接続され、出力側の各相コイルは、入力側の各相コイルによる磁界の方向とは同一方向の磁界となる方向として電気装置の出力回路４に直列接続されたものである。 The common mode noise generated from the inverter circuit 1 is a dipole (resonance) generated in the same phase in the input circuit 2 and the output circuit 4 as viewed from the inverter circuit 1 in addition to the loop mode common mode noise described in the first embodiment. Mode common mode noise is also generated.
The common-mode common mode choke 7 is wound around a common magnetic circuit in which each phase coil on the input side and each phase coil on the output side are insulated from each other, and each phase coil on the input side is connected to the input circuit 2 of the electric device. The respective phase coils on the output side are connected in series to the output circuit 4 of the electric device in a direction in which the direction of the magnetic field is the same as the direction of the magnetic field by each phase coil on the input side.

このように入力回路２と出力回路４に跨って逆相コモンモードチョーク６と同相コモンモードチョーク７を直列接続した構成にすると、実施の形態１で説明したコモンモードノイズと、インバータ回路１から見て、入力回路２と出力回路４に同相で伝播するダイポールモードのコモンモードノイズも抑制できる構成となる。   In this way, when the reverse-phase common mode choke 6 and the common-mode common mode choke 7 are connected in series across the input circuit 2 and the output circuit 4, the common mode noise described in the first embodiment and the inverter circuit 1 are considered. Thus, the dipole mode common mode noise propagating in the same phase to the input circuit 2 and the output circuit 4 can be suppressed.

実施の形態３．
実施の形態３のインバータ回路を備えた電気装置のブロック図を図３に示す。図３の構成は、インバータ回路１の入力回路２に電源ノイズフィルタと、入力回路２と出力回路４に跨って逆相コモンモードチョーク６を設けたものである。図４は三相回路用の電源ノイズフィルタと逆相コモンモードチョーク６を一体にしてブロック化した場合のノイズフィルタ８の詳細構成図である。このノイズフィルタ８は図３に内蔵した構成としても、ブロック化して外付けする構成のいずれでもよい。
図４の構成は、図３の入力回路２のインバータ回路１側に接続される入力回路２１と、交流電源３側に接続される電源入力回路２２の間に、コモンモードチョーク２３と逆相コモンモードチョ−ク６の入力側コイルを直列接続し、電源入力回路２２の相間にコンデンサ２４、コモンモードチョーク２３と逆相コモンモードチョーク６の間の相間にコンデンサ２５および各相の対地間にコンデンサ２６を接続して電源ノイズフィルタを構成し、インバータ回路１の入力側には電源入力回路２１により接続される。
インバータ１の出力側は出力回路４１により逆相コモンモードチョーク６の出力側コイルに接続し、逆相コモンモードチョーク６の出力側コイルから、負荷接続回路４２により負荷５に接続される構成である。 Embodiment 3 FIG.
FIG. 3 shows a block diagram of an electric device provided with the inverter circuit of the third embodiment. In the configuration of FIG. 3, the input circuit 2 of the inverter circuit 1 is provided with a power supply noise filter and a reverse-phase common mode choke 6 across the input circuit 2 and the output circuit 4. FIG. 4 is a detailed configuration diagram of the noise filter 8 when the three-phase power supply noise filter and the anti-phase common mode choke 6 are integrated into a block. The noise filter 8 may have either a configuration built in FIG. 3 or a configuration externally provided in a block form.
4 includes a common mode choke 23 and a negative-phase common between an input circuit 21 connected to the inverter circuit 1 side of the input circuit 2 of FIG. 3 and a power input circuit 22 connected to the AC power supply 3 side. The input side coil of the mode choke 6 is connected in series, the capacitor 24 between the phases of the power input circuit 22, the capacitor 25 between the phase between the common mode choke 23 and the negative common mode choke 6, and the capacitor between each phase ground. 26 is connected to form a power noise filter, and the input side of the inverter circuit 1 is connected by a power input circuit 21.
The output side of the inverter 1 is connected to the output side coil of the negative phase common mode choke 6 by the output circuit 41, and is connected to the load 5 by the load connection circuit 42 from the output side coil of the negative phase common mode choke 6. .

このノイズフィルタ８の電源ノイズフィルタは、従来から使用されているＬＣ形の電源ノイズフィルタであり、特に低周波帯（数百ｋＨｚ〜数ＭＨｚ）のノイズ減衰を目的としている構成である。コモンモードチョーク２３は、共通の磁気回路に３相のコイルが互いに絶縁されて巻回された構成である。   The power supply noise filter of the noise filter 8 is an LC type power supply noise filter that has been used in the past, and has a configuration especially intended for noise attenuation in a low frequency band (several hundred kHz to several MHz). The common mode choke 23 has a configuration in which a three-phase coil is insulated and wound around a common magnetic circuit.

このように構成し、逆相コモンモードチョーク６の磁気回路の材質・形状などを高周波（数ＭＨｚ〜数十ＭＨｚ）周波数帯の高帯域のノイズを抑制するように選択すると、電源ノイズとともに、ループモードのコモンモードノイズが抑制できる構成となる。   When configured in this way, the material and shape of the magnetic circuit of the reversed-phase common mode choke 6 are selected so as to suppress high-frequency noise in the high frequency (several MHz to several tens of MHz) frequency band. It becomes the structure which can suppress common mode noise of a mode.

図３におけるノイズフィルタ８は、電源ノイズフィルタと逆相コモンモードチョーク６を一体にブロックにしたものであり、ノイズフィルタ８として組み立てた後に装置に組み込まれるので、生産性が向上する効果がある。   The noise filter 8 in FIG. 3 is a block in which the power supply noise filter and the anti-phase common mode choke 6 are integrally formed. Since the noise filter 8 is assembled into the apparatus after being assembled as the noise filter 8, there is an effect of improving productivity.

実施の形態１のインバータ回路を備えた電気装置の構成図である。1 is a configuration diagram of an electric device including an inverter circuit according to Embodiment 1. FIG. 実施の形態２のインバータ回路を備えた電気装置の構成図である。FIG. 6 is a configuration diagram of an electric device including an inverter circuit according to a second embodiment. 実施の形態３のインバータ回路を備えた電気装置の構成図である。FIG. 6 is a configuration diagram of an electric device including an inverter circuit according to a third embodiment. 図３の電源ノイズフィルタと逆相コモンモードチョークをブロック化したノイズフィルタのブロック図である。FIG. 4 is a block diagram of a noise filter in which the power supply noise filter and the negative-phase common mode choke of FIG. 3 are blocked.

符号の説明Explanation of symbols

１ インバータ回路、２ 入力回路、３ 交流電源、４ 出力回路、５ 負荷、
６ 逆相コモンモードチョーク、７ 同相コモンモードコイル、８ ノイズフィルタ、
２１ 電源入力回路、２２ 電源回路、２３ コモンモードチョーク、
２４，２５，２６ コンデンサ、４１ 出力回路、４２ 負荷接続回路。 1 Inverter circuit, 2 input circuit, 3 AC power supply, 4 output circuit, 5 load,
6 Reverse-phase common mode choke, 7 In-phase common mode coil, 8 Noise filter,
21 power input circuit, 22 power supply circuit, 23 common mode choke,
24, 25, 26 capacitor, 41 output circuit, 42 load connection circuit.

Claims (4)

交流電源から入力された交流電圧をスイッチング素子により直流に変換し、変換した直流をスイッチング素子で所望の周波数および電圧の交流電圧に変換するインバータ回路を備えた電気装置において、共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、上記入力側の各相コイルは上記電気装置の入力回路に直列接続され、上記出力側の各相コイルは、上記インバータ回路から出力する方向のノイズ電流に対して、上記入力側の各相コイルによる磁界の方向とは逆方向の磁界となる方向として上記電気装置の出力回路に直列接続された逆相コモンモードチョークが配置されていることを特徴とするインバータ回路を備えた電気装置。 In an electric device equipped with an inverter circuit that converts an alternating voltage input from an alternating current power source into a direct current with a switching element and converts the converted direct current into an alternating voltage of a desired frequency and voltage with a switching element. Each phase coil on the output side and each phase coil on the output side are wound insulated from each other, each phase coil on the input side is connected in series to the input circuit of the electric device, and each phase coil on the output side is A negative-phase common mode connected in series to the output circuit of the electric device as a direction in which a magnetic field in the direction opposite to the direction of the magnetic field by each phase coil on the input side is applied to the noise current in the direction output from the inverter circuit An electric device comprising an inverter circuit, wherein a choke is disposed. 交流電源から入力された交流電圧をスイッチング素子により直流に変換し、変換した直流をスイッチング素子で所望の周波数および電圧の交流電圧に変換するインバータ回路を備えた電気装置において、共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、上記入力側の各相コイルは上記電気装置の入力回路に直列接続され、上記出力側の各相コイルは、上記インバータ回路から出力する方向のノイズ電流に対して、上記入力側の各相コイルによる磁界の方向とは逆方向の磁界となる方向として上記電気装置の出力回路に直列接続された逆相コモンモードチョークと、共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、上記入力側の各相コイルは上記電気装置の入力回路に直列接続され、上記出力側の各相コイルは、上記インバータ回路から出力する方向のノイズ電流に対して、上記入力側の各相コイルによる磁界の方向と同一方向の磁界となる方向として上記電気装置の出力回路に直列接続された同相コモンモードチョークとが配置されていることを特徴とするインバータ回路を備えた電気装置。 In an electric device equipped with an inverter circuit that converts an alternating voltage input from an alternating current power source into a direct current with a switching element and converts the converted direct current into an alternating voltage of a desired frequency and voltage with a switching element. Each phase coil on the output side and each phase coil on the output side are wound insulated from each other, each phase coil on the input side is connected in series to the input circuit of the electric device, and each phase coil on the output side is A negative-phase common mode connected in series to the output circuit of the electric device as a direction in which a magnetic field in the direction opposite to the direction of the magnetic field by each phase coil on the input side is applied to the noise current in the direction output from the inverter circuit The input side phase coil and the output side phase coil are insulated from each other and wound around the choke and a common magnetic circuit, and the input side phase coil is connected to the electric device. The phase coils connected in series to the input circuit are arranged in such a direction that the magnetic field in the same direction as the direction of the magnetic field generated by each phase coil on the input side is applied to the noise current in the direction of output from the inverter circuit. An electric device comprising an inverter circuit, wherein an in-phase common mode choke connected in series to an output circuit of the electric device is arranged. 交流電源から入力された交流電圧をスイッチング素子により直流に変換し、変換した直流をスイッチング素子で所望の周波数および電圧の交流電圧に変換するインバータ回路を備えた電気装置において、上記インバータ回路の交流電源に接続される入力回路には、共通の磁気回路に各相のコイルが互いに絶縁されて巻回され、入力回路に直列に接続されたコモンモードチョークと、上記入力回路の各相の相間および対地間に配置されたコンデンサとからなる電源フィルタ回路が接続され、共通の磁気回路に入力側の各相コイルと出力側の各相コイルとが互いに絶縁されて巻回され、上記入力側の各相コイルは、上記電気装置の入力回路の上記インバータ回路と上記フィルタ回路との間に直列接続され、上記出力側の各相コイルは、上記インバータ回路から出力する方向のノイズ電流に対して、上記入力側の各相コイルによる磁界の方向とは逆方向の磁界となる方向として上記電気装置の出力回路に直列接続された逆相コモンモードチョークが配置されていることを特徴とするインバータ回路を備えた電気装置。 An AC power supply for an inverter circuit, comprising: an inverter circuit that converts an AC voltage input from an AC power source into a DC voltage by a switching element, and converts the converted DC voltage to an AC voltage having a desired frequency and voltage by the switching element. The input circuit connected to each other includes a common mode choke in which coils of each phase are insulated and wound around a common magnetic circuit and connected in series to the input circuit, and between the phases of the input circuit and the ground. A power filter circuit composed of a capacitor disposed between them is connected, and each phase coil on the input side and each phase coil on the output side are wound around a common magnetic circuit while being insulated from each other. The coil is connected in series between the inverter circuit of the input circuit of the electric device and the filter circuit, and each phase coil on the output side is connected to the inverter. A negative-phase common mode choke connected in series to the output circuit of the electric device as a direction in which the magnetic field is opposite to the direction of the magnetic field generated by each phase coil on the input side with respect to the noise current in the direction of output from the output circuit. An electric device provided with an inverter circuit, wherein: 上記電源フィルタ回路および上記逆相コモンモードチョークは、一体に形成してノイズフィルタとしてブロック化したことを特徴とする請求項３記載のインバータ回路を備えた電気装置。 4. The electric device having an inverter circuit according to claim 3, wherein the power supply filter circuit and the negative-phase common mode choke are integrally formed and blocked as a noise filter.
JP2004050965A 2004-02-26 2004-02-26 Electric device provided with inverter circuit Pending JP2005245118A (en)

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EP1758034A2 (en) 2005-08-26 2007-02-28 Sony Corporation Method, apparatus and program for generating metadata

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JPS63156539U (en) * 1987-03-31 1988-10-13
JPH1198716A (en) * 1997-09-26 1999-04-09 Fuji Electric Co Ltd Uninterruptible power supply unit
JP2001244770A (en) * 2000-12-27 2001-09-07 Mitsubishi Electric Corp Noise filter
JP2002261842A (en) * 2001-02-28 2002-09-13 Matsushita Electric Ind Co Ltd Balanced transmission terminating apparatus and receiver using it

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63156539U (en) * 1987-03-31 1988-10-13
JPH1198716A (en) * 1997-09-26 1999-04-09 Fuji Electric Co Ltd Uninterruptible power supply unit
JP2001244770A (en) * 2000-12-27 2001-09-07 Mitsubishi Electric Corp Noise filter
JP2002261842A (en) * 2001-02-28 2002-09-13 Matsushita Electric Ind Co Ltd Balanced transmission terminating apparatus and receiver using it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1758034A2 (en) 2005-08-26 2007-02-28 Sony Corporation Method, apparatus and program for generating metadata

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