WO2009110354A1 - 出力フィルタとそれを用いた電力変換装置 - Google Patents
出力フィルタとそれを用いた電力変換装置 Download PDFInfo
- Publication number
- WO2009110354A1 WO2009110354A1 PCT/JP2009/053275 JP2009053275W WO2009110354A1 WO 2009110354 A1 WO2009110354 A1 WO 2009110354A1 JP 2009053275 W JP2009053275 W JP 2009053275W WO 2009110354 A1 WO2009110354 A1 WO 2009110354A1
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- Prior art keywords
- filter
- common mode
- output
- power converter
- polyphase
- Prior art date
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- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 230000007935 neutral effect Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- 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
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
- H03H7/425—Balance-balance networks
- H03H7/427—Common-mode filters
-
- 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
- H02M1/123—Suppression of common mode voltage or current
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1716—Comprising foot-point elements
- H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1758—Series LC in shunt or branch path
Definitions
- the present invention relates to an output filter that reduces high-frequency noise generated by a switching operation of a power converter, and a power converter using the output filter.
- Patent Documents 1 and 2 and Non-Patent Documents 1 and 2 are examples of output filters of conventional power converters.
- Patent Documents 1 and 2 and Non-Patent Document 1 are common mode filters for suppressing a common mode voltage.
- Non-Patent Document 2 is composed of a normal mode normal mode filter for suppressing a surge voltage at a motor terminal and a common mode filter for suppressing a common mode voltage.
- Non-Patent Document 1 Since the common mode filter represented by Patent Documents 1 and 2 and Non-Patent Document 1 has a resonant frequency of the filter lower than the carrier frequency of the power conversion device, high-frequency leakage current can be effectively suppressed. . Moreover, the filter system represented by the nonpatent literature 2 can suppress the common mode voltage and the surge voltage at the motor terminal. Further, the method represented by Non-Patent Document 2 has a filter cutoff frequency much higher than the carrier frequency of the power converter, compared with the methods of Patent Documents 1 and 2, Non-Patent Document 1, and so on. Is small and inexpensive. Japanese Patent No. 3596694 (6th page, FIG. 1) Japanese Patent No. 3466118 (page 12, FIG. 1) IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 28, NO. 4, p858-p863, JULY / AUGUST 1992 IEEJ Transactions D, Vol.116, No.12, 1996, p1211-1219
- the common mode filters represented by Patent Documents 1 and 2 and Non-Patent Document 1 have a problem that it is not possible to suppress the surge voltage at the motor terminal.
- the method of Non-Patent Document 2 has a problem that the cut-off frequency of the filter changes when the length of the motor cable changes, and can be used only for a specific application. Further, generally, when the frequency becomes high, there is a problem that the filter characteristics deteriorate due to the stray capacitance or wiring inductance scattered in each part of the circuit and the damping resistance used in the bypass circuit part of the filter.
- the conventional output filter can be used only for specific applications, and has a problem that the filter characteristics cannot be sufficiently exhibited at a high frequency.
- This invention is made in view of such a problem, suppresses the surge voltage at the motor terminal, suppresses the common mode voltage generated by switching in the power converter, and improves the high-frequency characteristics of the filter. It is an object of the present invention to provide an output filter and a power conversion device using the output filter.
- the invention according to claim 1 is a multiphase common mode filter having one end connected to the output of the power converter, and a multiphase normal mode having one end connected to the other end of the multiphase common mode filter and the other end connected to the motor.
- An output filter comprising: a multiphase common mode choke having one end connected to the output of the power converter; and a first end connected to the other end of the multiphase common mode choke.
- a neutral point detection transformer having one end connected to the other end of the first multiphase capacitor, and the multiphase normal mode filter has one end connected to the other end of the multiphase common mode choke.
- a connected multi-phase normal mode choke; and a second multi-phase capacitor having one end connected to the other end of the multi-phase normal mode choke and the other end connected to each other.
- a capacitor resistor series connection having one end connected to the frame ground of the power converter and the other end connected to the other end of the neutral point detection transformer, and the other end of the second multiphase capacitor and the capacitor One end of the resistor series connection body is connected.
- the invention according to claim 2 is the output filter according to claim 1, further comprising a parallel resistor connected in parallel with the polyphase normal mode choke.
- the neutral point detection transformer has one end of the neutral point detection transformer connected to the other end of the multiphase common mode choke and the other end being neutral.
- a primary winding serving as a sex point detection end and a secondary winding having a delta connection are provided.
- the output filter according to the first to third aspects is mounted on the output of the power converter.
- an output filter that suppresses a surge voltage at a motor terminal and suppresses a common mode voltage generated by switching in a power converter and improves a high frequency characteristic of the filter, and a power converter using the output filter. Can be provided.
- Example 1 The block diagram which shows the structure of Example 1 of this invention.
- the figure which shows the equivalent circuit of the motor in the output filter and common mode of this invention Normal mode equivalent circuit for one phase of output filter and motor The block diagram which shows the structure of Example 2.
- Common mode equivalent circuit between power converter and motor The figure which shows the gain characteristic of the output filter in normal mode Measurement results showing motor terminal voltage when using the output filter of the present invention Calculation results showing the gain characteristics of the power converter output filter in common mode Calculation result of each part voltage and current in common mode Frequency analysis calculation result of common mode voltage Vc1 and Vc2
- FIG. 1 is a block diagram showing a configuration when the output filter of the present invention is applied to a motor drive system.
- 100 is a power source
- 101 is a power converter
- 102 is a motor
- 103 is an output filter of the present invention
- 104 is a neutral point detection transformer.
- 120 is a polyphase common mode filter
- 121 is a polyphase common mode choke Lc
- 122 is a first polyphase capacitor Cc1
- 130 is a polyphase normal mode filter
- 131 is a polyphase normal mode choke Ln
- 132 is a second polyphase filter.
- Phase capacitors Cn and 133 are parallel resistors Rn, 141 is a primary winding of the neutral point detection transformer 104, 142 is a secondary winding of the neutral point detection transformer 104, and 150 is a capacitor resistor series connection Cc2 and Rc. .
- the present invention is different from the prior art in that a common mode filter return line n1 including a multiphase common mode choke 121, a first multiphase capacitor 122 for common mode filter, a capacitor resistor series connection 150, and a neutral point detection transformer 104 is provided. And a neutral point n2 of the polyphase normal mode filter 130 including the parallel resistor 133, the polyphase normal mode choke 131, and the second polyphase capacitor 132 is connected.
- Fig. 2 shows a connection diagram between the power converter and the motor
- Fig. 3 shows an equivalent circuit of the output filter in the normal mode.
- Cable 1 represents the stray capacitance between the power lines U, V, and W
- C cable 2 represents the stray capacitance between the power lines U, V, W and the ground line GND
- Cm represents the stray capacitance between the motor winding and the motor frame.
- An equivalent circuit for one phase of the output filter of the present invention can be expressed as shown in FIG.
- the output side filter of the present invention has different filter characteristics in the low frequency region and the high frequency region.
- FIGS. 3B and 3C the impedance of the normal mode choke Ln is smaller than that of the parallel resistor Rn in the low frequency region, and the parallel resistor Rn can be ignored. In the high frequency region, the impedance of the parallel resistor Rn is smaller than the impedance of the normal mode choke Ln, and the normal mode choke Ln can be ignored.
- FIG. 6A shows gain characteristics between the power lines U and V when there is no output filter
- FIG. 6B shows gain characteristics when the output filter of the present invention is used. As shown in FIG. 6B, when the output side filter of the present invention is used, the output gain does not decrease in the low frequency region, and the resonance phenomenon that causes the surge voltage can be reduced in the high frequency region.
- FIG. 6A shows gain characteristics between the power lines U and V when there is no output filter
- FIG. 6B shows gain characteristics when the output filter of the present invention is used. As shown in FIG. 6B, when the output side filter of the present invention is used, the output gain does not decrease in the low frequency
- FIG. 7A shows the motor terminal voltage V′uv when there is no output side filter
- FIG. 7B shows the motor terminal voltage V′uv when the output side filter of the present invention is used.
- the output side filter of the present invention acts as an RC filter for high frequency components in the normal mode, and can reduce the surge voltage at the motor terminal.
- FIG. 4 is a block diagram showing the configuration of the second embodiment.
- 4A shows the case where there is no output filter
- FIG. 4B shows the case where the output filter of the prior art is used
- FIG. 4C uses the output filter of the present invention.
- the circuit diagram in the case of being present is shown.
- FIG. 5 shows a common mode equivalent circuit when the output filter of the prior art of FIG. 4B is used, and the common mode when the output filter of the present invention of FIG. 4C is used.
- FIG. 8 shows filter characteristics when the output filter according to the prior art and the present invention is used. As shown in FIG. 8, the impedance of the bypass circuit of the common mode filter in the high frequency region is reduced by connecting the return line n1 of the common mode filter and the neutral point n2 of the normal mode filter as shown in FIG. Filter characteristics are improved.
- FIG. 9 shows the calculation results of the common mode voltages Vc1 and Vc2 and the filter current If when the output side filter of the prior art and the present invention is used.
- Vc1 represents the common mode voltage before the filter
- Vc2 represents the common mode voltage after the filter.
- FIG. 10 shows the calculation result of the frequency analysis of the common mode voltage Vc2 at the latter stage of the filter when the output side filter of the conventional technique and the present invention is used.
- the common mode voltage of the high frequency component applied to the motor can be reduced by using the output filter of the present invention, the deterioration of the motor bearing portion due to electrolytic corrosion can be suppressed. Further, since the common mode current flowing to the power supply side can be reduced, the ground capacitor or common mode choke coil of the EMI filter used for noise terminal voltage suppression can be reduced.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
本発明はこのような問題点に鑑みてなされたものであり、モータ端子でのサージ電圧を抑制するとともに電力変換装置でのスイッチングにより発生するコモンモード電圧を抑制し、フィルタの高周波特性を良好にする出力フィルタとそれを用いた電力変換装置を提供することを目的とする。
請求項3記載の発明は、請求項1記載の出力フィルタにおいて、前記中性点検出トランスは、前記中性点検出トランスの一端を前記多相コモンモードチョークの他端に接続し他端を中性点検出端とする1次巻線と、デルタ結線した2次巻線と、を備えることを特徴とするものである。
請求項4記載の発明は、電力変換装置において、請求項1乃至3記載の出力フィルタを電力変換器の出力に搭載したことを特徴とするものである。
101 電力変換装置
102 モータ
103 本発明の電力変換装置出力側フィルタ
104 中性点検出トランス
105 モータ1相当たりのインダクタンスおよび抵抗成分
120 多相コモンモードフィルタ
121 多相コモンモードチョーク
122 第1多相コンデンサ
130 多相ノーマルモードフィルタ
131 多相ノーマルモードチョーク
132 第2多相コンデンサ
133 並列抵抗
141 中性点検出トランスの1次巻線
142 中性点検出トランスの2次巻線
150 コンデンサ抵抗直列接続体
Claims (4)
- 一端を電力変換器の出力に接続した多相コモンモードフィルタと、一端を前記多相コモンモードフィルタの他端に接続し他端をモータに接続した多相ノーマルモードフィルタと、からなる出力フィルタにおいて、
前記多相コモンモードフィルタは、一端を前記電力変換器の出力に接続した多相コモンモードチョークと、一端を前記多相コモンモードチョークの他端に接続した第1多相コンデンサと、一端を前記第1多相コンデンサの他端に接続した中性点検出トランスと、を備え、
前記多相ノーマルモードフィルタは、一端を前記多相コモンモードチョークの他端に接続した多相ノーマルモードチョークと、一端を前記多相ノーマルモードチョークの他端に接続し他端どうしを接続した第2多相コンデンサと、を備え、
一端を前記電力変換器のフレームグランドに接続し他端を前記中性点検出トランスの他端に接続したコンデンサ抵抗直列接続体と、を備え、
前記第2多相コンデンサの他端と前記コンデンサ抵抗直列接続体の一端を接続したことを特徴とする出力フィルタ。 - 前記多相ノーマルモードチョークと並列に接続した並列抵抗を備えることを特徴とする請求項1記載の出力フィルタ。
- 前記中性点検出トランスは、前記中性点検出トランスの一端を前記多相コモンモードチョークの他端に接続し他端を中性点検出端とする1次巻線と、デルタ結線した2次巻線と、を備えることを特徴とする請求項1記載の出力フィルタ。
- 請求項1乃至3記載の出力フィルタを電力変換器の出力に搭載したことを特徴とする電力変換装置。
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JP2010501857A JP5168349B2 (ja) | 2008-03-04 | 2009-02-24 | 出力フィルタとそれを用いた電力変換装置 |
CN2009801012361A CN101884158B (zh) | 2008-03-04 | 2009-02-24 | 输出滤波器及使用该滤波器的电力转换装置 |
US12/875,129 US8228019B2 (en) | 2008-03-04 | 2010-09-03 | Output filter and motor drive system including the same |
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JP2008052911 | 2008-03-04 | ||
JP2008-052911 | 2008-03-04 |
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US12/875,129 Continuation US8228019B2 (en) | 2008-03-04 | 2010-09-03 | Output filter and motor drive system including the same |
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JP (1) | JP5168349B2 (ja) |
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KR101070187B1 (ko) * | 2009-06-12 | 2011-10-05 | (주) 다쓰테크 | 태양광 계통 연계형 단상 인버터 회로 |
CN103109436A (zh) * | 2010-09-08 | 2013-05-15 | 雷诺股份公司 | 用于限制漏电流的设备和方法 |
JP2014132811A (ja) * | 2013-01-07 | 2014-07-17 | Oki Electric Cable Co Ltd | サージ抑制システム、サージ抑制ケーブル、サージ抑制ユニット及びサージ抑制機能付きケーブル |
WO2016030933A1 (ja) * | 2014-08-25 | 2016-03-03 | 富士電機株式会社 | 電力変換装置 |
JPWO2016030933A1 (ja) * | 2014-08-25 | 2017-04-27 | 富士電機株式会社 | 電力変換装置 |
US10122281B2 (en) | 2014-08-25 | 2018-11-06 | Fuji Electric Co., Ltd. | Power conversion device for cancelling leakage current |
US11398773B2 (en) | 2019-09-13 | 2022-07-26 | Goodrich Control Systems | Filter for power train |
JP2021097298A (ja) * | 2019-12-16 | 2021-06-24 | 株式会社村田製作所 | ノイズ対策回路 |
JP7439490B2 (ja) | 2019-12-16 | 2024-02-28 | 株式会社村田製作所 | ノイズ対策回路 |
Also Published As
Publication number | Publication date |
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US20110050135A1 (en) | 2011-03-03 |
CN101884158B (zh) | 2013-02-13 |
JPWO2009110354A1 (ja) | 2011-07-14 |
US8228019B2 (en) | 2012-07-24 |
CN101884158A (zh) | 2010-11-10 |
JP5168349B2 (ja) | 2013-03-21 |
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