TWI450488B - Active filter device and power conversion device - Google Patents
Active filter device and power conversion device Download PDFInfo
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- TWI450488B TWI450488B TW099108860A TW99108860A TWI450488B TW I450488 B TWI450488 B TW I450488B TW 099108860 A TW099108860 A TW 099108860A TW 99108860 A TW99108860 A TW 99108860A TW I450488 B TWI450488 B TW I450488B
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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
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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
- 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
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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
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
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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
- H02M1/123—Suppression of common mode voltage or current
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Description
本發明係關於一種設於電力轉換機器之濾波器裝置，特別是關於一種用以降低起因於開關之共用模式電流及EMI(電磁干擾)雜訊流出至交流系統之量之主動濾波器裝置及將主動濾波器裝置設於輸入側之電力轉換裝置。The present invention relates to a filter device provided in a power conversion machine, and more particularly to an active filter device for reducing a common mode current and EMI (electromagnetic interference) noise caused by a switch to an AC system. The active filter device is provided on the input side power conversion device.
隨著電力用半導體元件之特性提升，可實現開關頻率之高頻化。以無停電電源裝置或通訊用電源裝置為代表之電力轉換裝置，基於對高速回應或低噪音之要求、濾波器之小型化要求等，廣泛使用利用PWM(脈寬調變)控制之高頻開關方式。As the characteristics of semiconductor components for power are increased, the switching frequency can be increased. A power conversion device represented by an uninterruptible power supply device or a communication power supply device is widely used for high-frequency switching using PWM (pulse width modulation) control based on requirements for high-speed response or low noise, miniaturization of filters, and the like. the way.
隨著開關頻率之高頻化之進展，透過直流連結部或纜線流至大地之高頻洩漏電流變大。此高頻洩漏電流成為流入交流系統之雜訊，對連接於交流系統之其他裝置造成不良影響而成為社會問題。例如，在無停電電源裝置，特別是將大容量之蓄電池以懸浮方式連接於直流側時，會有大的高頻洩漏電流從此蓄電池及變長之直流纜線流至大地之傾向，此高頻洩漏電流對連接於交流系統之其他交流機器造成不良影響。As the frequency of the switching frequency progresses, the high-frequency leakage current flowing to the ground through the DC link or the cable becomes large. This high-frequency leakage current becomes a noise flowing into the AC system, which adversely affects other devices connected to the AC system and becomes a social problem. For example, in an uninterruptible power supply device, particularly when a large-capacity battery is connected to the DC side in a floating manner, there is a tendency for a large high-frequency leakage current to flow from the battery and the variable-length DC cable to the ground. Leakage currents adversely affect other AC machines connected to the AC system.
作為降低流出至交流系統之高頻洩漏電流之方法，例如已知有專利文獻1所揭示之主動濾波器裝置。圖5係專利文獻1所示之習知雜訊降低裝置及電力轉換裝置的構成 圖。圖5中，接地E0,E1,E2係共通之接地，但為了便於說明分別賦予不同符號。As a method of reducing the high-frequency leakage current flowing to the AC system, for example, an active filter device disclosed in Patent Document 1 is known. 5 is a configuration of a conventional noise reduction device and a power conversion device shown in Patent Document 1. Figure. In Fig. 5, the groundings E0, E1, and E2 are common grounding, but different symbols are given for convenience of explanation.
圖5中，具備三相交流電源1、電力轉換裝置3、負載5、及設於三相交流電源1與電力轉換裝置3間之主動濾波器裝置7。In FIG. 5, a three-phase AC power supply 1, a power conversion device 3, a load 5, and an active filter device 7 provided between the three-phase AC power supply 1 and the power conversion device 3 are provided.
作為電流檢測器之電流變壓器20，捲繞有1匝數之電源線1a~1c與N匝數之檢測線20a，藉由檢測線20a以檢測比1/N(N>1)檢測電力轉換裝置3產生之共用模式電流io且輸出為檢測電流io/N。電容器C2具有電容器C1之(N-1)倍之導納。The current transformer 20 as a current detector is wound with a number of power lines 1a to 1c and N lines of detection lines 20a, and the detection line 20a detects the power conversion device with a detection ratio of 1/N (N>1). The generated common mode current io is 3 and the output is the detection current io/N. Capacitor C2 has an (N-1) times admittance of capacitor C1.
由電晶體11a,11b構成之放大器11之輸入(基極)與輸出(射極)間連接有檢測線20a，在電容器C1流過與檢測電流相同之電流io/N。又，在電容器C2流過在電容器C1流過之電流io/N之(N-1)倍之電流(N-1)io/N。亦即，在接地E1流過檢測電流io/N之N倍之電流io。A detection line 20a is connected between an input (base) and an output (emitter) of the amplifier 11 composed of the transistors 11a and 11b, and a current io/N which is the same as the detection current flows through the capacitor C1. Further, a current (N-1) io/N of (N-1) times the current io/N flowing through the capacitor C1 flows through the capacitor C2. That is, a current io that is N times the detection current io/N flows through the ground E1.
由於檢測電流係電力轉換裝置3之共用模式電流io之1/N倍，因此流過放大器11之電流與共用模式電流io相同，可抵銷流出至交流系統之共用模式電流。藉此，可降低流出至交流系統之共用模式電流。Since the detection current is 1/N times the common mode current io of the power conversion device 3, the current flowing through the amplifier 11 is the same as the common mode current io, and the common mode current flowing out to the AC system can be offset. Thereby, the common mode current flowing out to the AC system can be reduced.
然而，圖5所示之電力轉換裝置3中，流過大的補償電流時，會有電容器C1,C2之端子電壓變高之情形。此端子電壓超過放大器11之電源電壓時，放大器11飽和，無法獲得共用模式電流之降低效果。為了解決此問題，根據最大補償電流設計放大器11之電源電壓。However, in the power conversion device 3 shown in FIG. 5, when a large compensation current flows, the terminal voltages of the capacitors C1 and C2 may increase. When the terminal voltage exceeds the power supply voltage of the amplifier 11, the amplifier 11 is saturated, and the effect of reducing the common mode current cannot be obtained. In order to solve this problem, the power supply voltage of the amplifier 11 is designed according to the maximum compensation current.
圖6及圖7係習知主動濾波器裝置之直流電源之具體構成例。圖6中，僅以二極體D7及電容器C5使交流系統之三相交流電源1之交流電壓整流平滑並產生放大器11之直流電源(動作電源)。圖7中，以二極體D7,D8,D9、電容器C5,C6、電晶體Q7及電阻13c使交流系統之三相交流電源1之交流電壓1/2電壓整流平滑並產生放大器11之直流電源(動作電源)。6 and 7 show a specific configuration example of a DC power supply of a conventional active filter device. In Fig. 6, the AC voltage of the three-phase AC power supply 1 of the AC system is rectified by the diode D7 and the capacitor C5 to generate a DC power supply (operation power supply) of the amplifier 11. In Fig. 7, the diodes D7, D8, D9, capacitors C5, C6, transistor Q7 and resistor 13c rectify the AC voltage 1/2 voltage of the three-phase AC power supply 1 of the AC system and generate the DC power of the amplifier 11. (action power).
專利文獻1：日本特開2008-312429號公報Patent Document 1: Japanese Laid-Open Patent Publication No. 2008-312429
然而，圖6、圖7所示之構成，對構成放大器11之電晶體11a,11b恆施加直流電源Vc(電容器C5之端子電壓)之大致一半之電壓，有電晶體11a,11b之散熱變大之缺點。又，電晶體11a,11b之損耗與放大器11之電源電壓(及補償電流)成正比。即使用以補償(抵銷)共用模式電流之補償電流較小時，亦產生大的放大器損耗，系統整體之效率變差。However, in the configuration shown in Figs. 6 and 7, the voltage of the DC power supply Vc (the terminal voltage of the capacitor C5) is constantly applied to the transistors 11a and 11b constituting the amplifier 11, and the heat dissipation of the transistors 11a and 11b becomes large. The shortcomings. Moreover, the losses of the transistors 11a, 11b are proportional to the supply voltage (and compensation current) of the amplifier 11. Even if the compensation current for compensating (offsetting) the common mode current is small, a large amplifier loss is generated, and the overall efficiency of the system is deteriorated.
本發明提供一種在補償電流較小時可降低放大器損耗之主動濾波器裝置及電力轉換裝置。The present invention provides an active filter device and a power conversion device that can reduce amplifier loss when the compensation current is small.
第1發明之主動濾波器裝置，係設於以三個電源線內之一個電源線為接地之相之三相交流電源與電力轉換裝置之間，以降低流於該電源線之共用模式電流產生之雜訊，該電力轉換裝置將從該三相交流電源供應之交流電力轉換成既定交流電力或直流電力並供應至負載且在殼體具有接地端子，其特徵在於，具備：可變直流電源，從該電源線 獲得電力，可變為任意之直流輸出電壓並加以輸出；電流檢測手段，***有該電源線與檢測線，藉由該檢測線檢測該共用模式電流並輸出共用模式電流檢測訊號；放大器，以該可變直流電源之直流輸出電壓為電源電壓，以振幅度1將該共用模式電流檢測訊號加以增幅，使電流經由第1電容器流過該接地之相之電源線與接地之間；以及電壓檢測手段，用以檢測該放大器之輸出振幅；根據以該電壓檢測手段檢測之輸出振幅檢測訊號使該可變直流電源之直流輸出電壓為可變。The active filter device according to the first aspect of the present invention is provided between a three-phase AC power source and a power conversion device in which one of the three power supply lines is grounded to reduce a common mode current generated in the power supply line. The power conversion device converts the AC power supplied from the three-phase AC power source into a predetermined AC power or DC power and supplies it to a load, and has a ground terminal in the casing, and is characterized in that: a variable DC power supply is provided. From the power cord Obtaining electric power, which can be converted into an arbitrary DC output voltage and outputting; the current detecting means is inserted with the power line and the detecting line, and the common mode current is detected by the detecting line and the common mode current detecting signal is output; the amplifier is The DC output voltage of the variable DC power supply is the power supply voltage, and the common mode current detection signal is amplified by the amplitude degree 1 so that the current flows between the power supply line of the grounded phase and the ground through the first capacitor; and the voltage detecting means And detecting an output amplitude of the amplifier; and changing a DC output voltage of the variable DC power source according to an output amplitude detection signal detected by the voltage detecting means.
第2發明之主動濾波器裝置，係設於以三個電源線內之一個電源線為接地之相之三相交流電源與電力轉換裝置之間，以降低流於該電源線之共用模式電流產生之雜訊，該電力轉換裝置將從該三相交流電源供應之交流電力轉換成既定交流電力或直流電力並供應至負載且在殼體具有接地端子，其特徵在於，具備：可變直流電源，從該電源線獲得電力，可變為任意之直流輸出電壓並加以輸出；電流檢測手段，***有該電源線與檢測線，藉由該檢測線以1/N(N>1)之檢測比檢測該共用模式電流並輸出共用模式電流檢測訊號；放大器，以該可變直流電源之直流輸出電壓為電源電壓，以振幅度1將該共用模式電流檢測訊號加以增幅，使電流經由第1電容器流過該接地之相之電源線與接地之間；第2電容器，具有該第1電容器之(N-1)倍之導納，使電流從與該放大器大致相同電位之端子流過該接地之相之電源線與接地之間；以及電壓檢測手段，用以檢測 該放大器之輸出振幅；根據以該電壓檢測手段檢測之輸出振幅檢測訊號使該可變直流電源之直流輸出電壓為可變。The active filter device according to the second aspect of the present invention is provided between a three-phase AC power supply and a power conversion device in which one of the three power supply lines is grounded to reduce a current sharing in the common mode of the power supply line. The power conversion device converts the AC power supplied from the three-phase AC power source into a predetermined AC power or DC power and supplies it to a load, and has a ground terminal in the casing, and is characterized in that: a variable DC power supply is provided. The power is obtained from the power line, and can be converted into an arbitrary DC output voltage and output. The current detecting means is inserted with the power line and the detecting line, and the detection line is detected by a detection ratio of 1/N (N>1). The common mode current outputs a common mode current detection signal; the amplifier uses the DC output voltage of the variable DC power supply as a power supply voltage, and increases the common mode current detection signal by amplitude degree 1 to cause current to flow through the first capacitor. The grounding phase is between the power supply line and the ground; the second capacitor has an (N-1) times the admittance of the first capacitor, so that the current is substantially the same as the current. The relative flow between the terminals of the power supply line and a ground grounded; and a voltage detecting means for detecting The output amplitude of the amplifier; the DC output voltage of the variable DC power source is made variable according to the output amplitude detection signal detected by the voltage detecting means.
第3發明之電力轉換裝置，係將從三相交流電源供應之交流電力轉換成既定交流電力或直流電力並供應至負載，其特徵在於：將第1或第2發明之主動濾波器裝置設於輸入側。The power conversion device according to the third aspect of the present invention is characterized in that the AC power supplied from the three-phase AC power source is converted into a predetermined AC power or DC power and supplied to the load, and the active filter device of the first or second invention is provided. Input side.
根據本發明，電壓檢測手段檢測放大器之輸出振幅，根據以電壓檢測手段檢測之輸出振幅檢測訊號使可變直流電源之直流輸出電壓為可變，因此在補償電流較小時，放大器之電源電壓變小，可降低放大器損耗。According to the present invention, the voltage detecting means detects the output amplitude of the amplifier, and the DC output voltage of the variable DC power source is made variable according to the output amplitude detecting signal detected by the voltage detecting means. Therefore, when the compensation current is small, the power supply voltage of the amplifier becomes variable. Small to reduce amplifier losses.
以下，參照圖式詳細說明本發明之主動濾波器裝置及電力轉換裝置之實施形態。Hereinafter, embodiments of the active filter device and the power conversion device according to the present invention will be described in detail with reference to the drawings.
圖1係實施例1之主動濾波器裝置及電力轉換裝置的構成圖。圖1中，具備三相交流電源1、電力轉換裝置3、負載5、及設於三相交流電源1與電力轉換裝置3間之主動濾波器裝置7-1。Fig. 1 is a configuration diagram of an active filter device and a power conversion device of the first embodiment. In FIG. 1, a three-phase AC power supply 1, a power conversion device 3, a load 5, and an active filter device 7-1 provided between the three-phase AC power supply 1 and the power conversion device 3 are provided.
在三相交流電源1連接R相用電源線1a、S相用電源線1b、及T相用電源線1c，S相用電源線1b係接地之相之電源線，其接地。電力轉換裝置3之殼體(架)3a係連接於接地端子E而接地。在電力轉換裝置3與殼體3a之間各處具有對地間電容，但將此等綜合顯示成電力轉換裝置3之電 容器C0之負極與接地端子E之間之對地間電容4。The three-phase AC power supply 1 is connected to the R-phase power supply line 1a, the S-phase power supply line 1b, and the T-phase power supply line 1c, and the S-phase power supply line 1b is grounded to the ground line. The casing (frame) 3a of the power conversion device 3 is connected to the ground terminal E and grounded. There is a capacitance between the ground between the power conversion device 3 and the casing 3a, but these are collectively displayed as the power of the power conversion device 3. The ground capacitance 4 between the negative electrode of the container C0 and the ground terminal E.
R相用、S相用、T相用電源線1a~1c係分別連接於主動濾波器裝置7-1之端子R1,S1,T1。主動濾波器裝置7-1具有電流變壓器10(電流檢測手段)、由NPN電晶體11a與PNP電晶體11b構成之放大器11、低頻分離電容器C1(第1電容器)、二極體D7、電容器C5、非絕緣之可變直流電源30、二極體D8、電容器C3、電阻R1,R2。The R-phase, S-phase, and T-phase power supply lines 1a to 1c are connected to the terminals R1, S1, and T1 of the active filter device 7-1, respectively. The active filter device 7-1 includes a current transformer 10 (current detecting means), an amplifier 11 composed of an NPN transistor 11a and a PNP transistor 11b, a low frequency separating capacitor C1 (first capacitor), a diode D7, and a capacitor C5. Non-insulated variable DC power supply 30, diode D8, capacitor C3, resistors R1, R2.
非絕緣之可變直流電源30具備輸入端子、輸出端子、共通端子、及輸出電壓調整端子，將直流輸入電壓輸入至輸入端子與共通端子間，根據輸入至輸出電壓調整端子之訊號將直流輸出電壓輸出至輸出端子與共通端子間。此可變直流電源30例如係以截斷型轉換器等構成。The non-insulated variable DC power supply 30 includes an input terminal, an output terminal, a common terminal, and an output voltage adjustment terminal, and inputs a DC input voltage between the input terminal and the common terminal, and outputs a DC output voltage according to a signal input to the output voltage adjustment terminal. Output to the output terminal and the common terminal. This variable DC power supply 30 is constituted by, for example, a cut-off type converter or the like.
電流變壓器10捲繞(貫通)有環狀鐵心作為主電源線之R相用、S相用、T相用電源線1a~1c各1匝數，且捲繞有檢測線10a1匝數。The current transformer 10 is wound (through) the R-phase for the main power supply line, the S-phase and the T-phase power supply lines 1a to 1c, and the number of turns of the detection line 10a1 is wound.
二極體D7之陽極係連接於R相用電源線1a，二極體D7之陰極係連接於可變直流電源30之輸入端子與電容器C5之一端。電容器C5之另一端與接地之相之電源線1b、電晶體11b之集極、可變直流電源30之共通端子連接。電容器C5之二端係連接於可變直流電源30之輸入端子與共通端子之間。可變直流電源30將電容器C5之直流電壓作為直流輸入電壓施加。The anode of the diode D7 is connected to the R-phase power supply line 1a, and the cathode of the diode D7 is connected to the input terminal of the variable DC power supply 30 and one end of the capacitor C5. The other end of the capacitor C5 is connected to the power supply line 1b of the grounded phase, the collector of the transistor 11b, and the common terminal of the variable DC power supply 30. The two ends of the capacitor C5 are connected between the input terminal of the variable DC power source 30 and the common terminal. The variable DC power source 30 applies a DC voltage of the capacitor C5 as a DC input voltage.
電晶體11a之集極係連接於可變直流電源30之輸出端子，電晶體11a之基極係連接於電晶體11b之基極、檢測線 10a之一端、低頻分離電容器C1之一端，低頻分離電容器C1之另一端係連接於接地端子E。The collector of the transistor 11a is connected to the output terminal of the variable DC power source 30, and the base of the transistor 11a is connected to the base of the transistor 11b and the detection line. One end of 10a, one end of the low frequency separation capacitor C1, and the other end of the low frequency separation capacitor C1 are connected to the ground terminal E.
電晶體11a之射極係連接於電晶體11b之射極、檢測線10a之另一端、二極體D8之陽極，二極體D8之陰極係連接於電容器C3之一端與電阻R1之一端。電阻R1之另一端係透過電阻R2連接於電容器C3之另一端與電晶體11b之集極。The emitter of the transistor 11a is connected to the emitter of the transistor 11b, the other end of the detection line 10a, and the anode of the diode D8. The cathode of the diode D8 is connected to one end of the capacitor C3 and one end of the resistor R1. The other end of the resistor R1 is connected to the other end of the capacitor C3 and the collector of the transistor 11b through the resistor R2.
電阻R1與電阻R2之連接點係連接於可變直流電源30之輸出調整端子。由二極體D8、電容器C3、電阻R1,R2構成之電壓檢測手段，將電阻R1與電阻R2之連接點之電壓檢測為放大器11之輸出振幅，根據檢測之輸出振幅檢測訊號使可變直流電源30之直流輸出電壓Vr為可變。The connection point between the resistor R1 and the resistor R2 is connected to the output adjustment terminal of the variable DC power source 30. A voltage detecting means composed of a diode D8, a capacitor C3, and resistors R1 and R2 detects a voltage at a connection point between the resistor R1 and the resistor R2 as an output amplitude of the amplifier 11, and a variable DC power source is detected based on the detected output amplitude detecting signal. The DC output voltage Vr of 30 is variable.
又，在***電流變壓器10之電源線1a,1b,1c分別對應串聯抗流線圈L1,L2,L3。電力轉換裝置3具有抗流線圈L1,L2,L3、6個二極體D1~D6、由6個IGBT(絕緣柵雙極型電晶體)構成之開關元件Q1~Q6、電容器C0。開關元件Q1與開關元件Q2之串聯電路之二端、開關元件Q3與開關元件Q4之串聯電路之二端、開關元件Q5與開關元件Q6之串聯電路之二端係連接於電容器C0之二端及負載5。Further, the power supply lines 1a, 1b, 1c inserted into the current transformer 10 correspond to the series choke coils L1, L2, and L3, respectively. The power conversion device 3 includes choke coils L1, L2, L3, six diodes D1 to D6, switching elements Q1 to Q6 composed of six IGBTs (insulated gate bipolar transistors), and a capacitor C0. Two ends of the series circuit of the switching element Q1 and the switching element Q2, two ends of the series circuit of the switching element Q3 and the switching element Q4, and two ends of the series circuit of the switching element Q5 and the switching element Q6 are connected to the two ends of the capacitor C0 and Load 5.
在開關元件Q1~Q6之集極-射極間分別對應連接二極體D1~D6。在二極體D1與二極體D2之連接點連接抗流線圈L1，在二極體D3與二極體D4之連接點連接抗流線圈L2，在二極體D5與二極體D6之連接點連接抗流線圈L3。各開關元件Q1~Q6之閘極端子係連接於未圖示之控制電 路，藉由此控制電路控制開關元件Q1~Q6之導通/斷開，電力轉換裝置3，動作為將從三相交流電源1供應之交流電力轉換成既定直流電力並供應至負載5之轉換器(交流直流轉換裝置)。The diodes D1 to D6 are respectively connected between the collector and the emitter of the switching elements Q1 to Q6. The choke coil L1 is connected to the connection point of the diode D1 and the diode D2, and the choke coil L2 is connected at the connection point of the diode D3 and the diode D4, and the connection between the diode D5 and the diode D6 is connected. Connect the choke coil L3 to the point. The gate terminals of each of the switching elements Q1 to Q6 are connected to a control power not shown By controlling the circuit to control the on/off of the switching elements Q1 to Q6, the power conversion device 3 operates as a converter that converts the AC power supplied from the three-phase AC power source 1 into a predetermined DC power and supplies it to the load 5. (AC DC converter).
此外，作為電力轉換裝置，使用將從三相交流電源1供應之交流電力轉換成既定交流電力並供應至負載5之變流器亦可。Further, as the power conversion device, a converter that converts the AC power supplied from the three-phase AC power supply 1 into a predetermined AC power and supplies it to the load 5 may be used.
接著，參照圖1說明實施例1之主動濾波器裝置之動作。首先，在電流變壓器10，共用模式電流i0 流過1匝數之電源線1a~1c時，在1匝數之檢測線10a亦流過與共用模式電流相同之電流i0 。Next, the operation of the active filter device of the first embodiment will be described with reference to Fig. 1 . First, the current transformer 10, the common mode current i 0 flows through a number of turns when power line 1a ~ 1C, the detection line 1 10a also flows through the same number of turns the current of the common mode current i 0.
放大器11以振幅度1將流過檢測線10a之i0 加以增幅，使電流經由低頻分離電容器C1流至接地E1。此時，以二極體D8及電容器C3使電晶體11a,11b之射極之輸出整流平滑，將電阻R1與電阻R2之連接點之電壓檢測為放大器11之輸出振幅，根據檢測之輸出振幅檢測訊號使可變直流電源30之直流輸出電壓Vr為可變。是以，用以抵銷共用模式電流之補償電流較小時，放大器11之電源電壓變小，可降低放大器11損耗。The amplifier 11 amplifies i 0 flowing through the detection line 10a by the amplitude degree 1, and causes the current to flow to the ground E1 via the low frequency separation capacitor C1. At this time, the output of the emitters of the transistors 11a, 11b is rectified by the diode D8 and the capacitor C3, and the voltage at the junction of the resistor R1 and the resistor R2 is detected as the output amplitude of the amplifier 11, and the amplitude of the output is detected according to the detection. The signal causes the DC output voltage Vr of the variable DC power source 30 to be variable. Therefore, when the compensation current for canceling the common mode current is small, the power supply voltage of the amplifier 11 becomes small, and the loss of the amplifier 11 can be reduced.
圖2係顯示與實施例1之主動濾波器裝置之電容器C3(與電阻R1與電阻R2之連接點之電壓對應)之兩端電壓對應使可變直流電源30之直流輸出電壓Vr為可變之情況。如圖2所示，與電容器C3之電壓成正比，可變直流電源30之直流輸出電壓Vr呈直線變化。2 shows that the voltage across the capacitor C3 (corresponding to the voltage at the junction of the resistor R1 and the resistor R2) of the active filter device of the first embodiment corresponds to the DC output voltage Vr of the variable DC power source 30 being variable. Happening. As shown in FIG. 2, in direct current with the voltage of the capacitor C3, the DC output voltage Vr of the variable DC power source 30 changes linearly.
圖3係實施例2之主動濾波器裝置及電力轉換裝置的構成圖。圖3所示之實施例2之主動濾波器裝置7-2，相對圖1所示之實施例1之主動濾波器裝置7-1，在電流變壓器20捲繞有N匝數(N>1，例如10匝數)之檢測線20a。Fig. 3 is a view showing the configuration of an active filter device and a power conversion device of the second embodiment; The active filter device 7-2 of the second embodiment shown in FIG. 3 is wound with a N-turn (N>1 in the current transformer 20 with respect to the active filter device 7-1 of the first embodiment shown in FIG. For example, 10 turns of the detection line 20a.
在電晶體11a,11b之射極與接地端子E之間連接有低頻分離電容器C2。低頻分離電容器C2具有低頻分離電容器C1之導納之9倍之導納。亦即，低頻分離電容器C2具有低頻分離電容器C1之電容之9倍之電容值。A low frequency separation capacitor C2 is connected between the emitters of the transistors 11a, 11b and the ground terminal E. The low frequency separation capacitor C2 has an admittance of 9 times the admittance of the low frequency separation capacitor C1. That is, the low frequency separation capacitor C2 has a capacitance value nine times that of the low frequency separation capacitor C1.
根據以上述方式構成之實施例2之主動濾波器裝置，首先，在電流變壓器20，共用模式電流i0 流過1匝數之電源線1a~1c時，在10匝數之檢測線20a流過共用模式電流之十分之一之電流i1 =i0 /10。According to the active filter device of the second embodiment constructed as described above, first, in the current transformer 20, when the common mode current i 0 flows through the power supply lines 1a to 1c of one turn, the detection line 20a of 10 turns flows. The current i 1 = i 0 /10 of one of the common mode currents.
放大器11等效於具有以使流過低頻分離電容器C1之電流i1 相等於電流i0 /10之方式控制電壓之增幅部V1及具有與增幅部V1之電壓相同之電壓、用以使電流i2 =9i1 =9i0 /10流過具有低頻分離電容器C1之9倍之電容之低頻分離電容器C2之增幅部V2。The amplifier 11 is equivalent to having an amplitude increasing portion V1 for controlling the voltage so that the current i 1 flowing through the low-frequency separation capacitor C1 is equal to the current i 0 /10 and a voltage having the same voltage as that of the amplification portion V1 for making the current i 2 = 9i 1 = 9i 0 /10 The amplification portion V2 of the low-frequency separation capacitor C2 having a capacitance nine times that of the low-frequency separation capacitor C1 flows.
亦即，增幅部V1以振幅度1將檢測線20a檢測之共用模式電流之十分之一之電流i0 /10加以增幅，使電流經由低頻分離電容器C1流至接地E1。又，增幅部V2使流過低頻分離電容器C1之電流i1 =i0 /10之9倍之電流i2 =9i1 =9i0 /10經由低頻分離電容器C2流至接地E1。That is, the amplification unit V1 amplifies the current i 0 /10 which is one tenth of the common mode current detected by the detection line 20a by the amplitude degree 1, and causes the current to flow to the ground E1 via the low frequency separation capacitor C1. Further, the amplification unit V2 causes the current i 2 = 9i 1 = 9i 0 / 10 which is 9 times the current i 1 = i 0 / 10 flowing through the low-frequency separation capacitor C1 to flow to the ground E1 via the low-frequency separation capacitor C2.
是以，在接地E1流過與共用模式電流i0 相同值之電流 i0 ，因此可降低流出至交流系統之共用模式電流。因此，可降低產生之雜訊，謀求低價且小型化。Therefore, the current flowing through the ground E1 i 0 the same value as the common-mode current i 0, thus reducing the common mode current flows to the AC systems. Therefore, the generated noise can be reduced, and the price can be reduced and miniaturized.
又，以二極體D8及電容器C3使電晶體11a,11b之射極之輸出整流平滑，將電阻R1與電阻R2之連接點之電壓檢測為放大器11之輸出振幅，根據檢測之輸出振幅檢測訊號使可變直流電源30之直流輸出電壓Vr為可變。是以，用以抵銷共用模式電流之補償電流較小時，放大器11之電源電壓變小，可降低正常時之放大器11損耗。Further, the output of the emitters of the transistors 11a and 11b is rectified and smoothed by the diode D8 and the capacitor C3, and the voltage at the junction of the resistor R1 and the resistor R2 is detected as the output amplitude of the amplifier 11, and the output amplitude detection signal is detected based on the detected output. The DC output voltage Vr of the variable DC power source 30 is made variable. Therefore, when the compensation current for canceling the common mode current is small, the power supply voltage of the amplifier 11 becomes small, and the loss of the amplifier 11 in the normal state can be reduced.
圖4係實施例3之主動濾波器裝置及電力轉換裝置的構成圖。圖4所示之實施例3之主動濾波器裝置7-3，相對圖3所示之實施例2之主動濾波器裝置7-2，取代電容器C1,C2設置電阻R3,R4、電容器C4，將電阻R3,R4串聯並連接於電晶體11a,11b之基極與射極之間，在電阻R3,R4之連接點與接地端子E之間連接電容器C4。4 is a configuration diagram of an active filter device and a power conversion device of the third embodiment. The active filter device 7-3 of the third embodiment shown in FIG. 4 is provided with resistors R3, R4 and capacitor C4 instead of the capacitors C1 and C2 with respect to the active filter device 7-2 of the embodiment 2 shown in FIG. The resistors R3 and R4 are connected in series and connected between the base and the emitter of the transistors 11a and 11b, and a capacitor C4 is connected between the connection point of the resistors R3 and R4 and the ground terminal E.
電阻R4具有電阻R3之導納(阻抗值之倒數)之9倍之導納。亦即，電阻R4具有電阻R3之1/9倍之阻抗值。Resistor R4 has an admittance of 9 times the admittance of the resistor R3 (the reciprocal of the impedance value). That is, the resistor R4 has an impedance value of 1/9 times the resistance R3.
根據以上述方式構成之實施例3之主動濾波器裝置，首先，在電流變壓器20，共用模式電流i0 流過1匝數之電源線1a~1c時，在10匝數之檢測線20a流過共用模式電流之十分之一之電流i1 =i0 /10。According to the active filter device of the third embodiment constructed as described above, first, in the current transformer 20, when the common mode current i 0 flows through the power supply lines 1a to 1c of one turn, the detection line 20a of 10 turns flows. The current i 1 = i 0 /10 of one of the common mode currents.
放大器11等效於具有以使流過電阻R3之電流i1 相等於電流i0 /10之方式控制電壓之增幅部V1及具有與增幅部V1之電壓相同之電壓、用以使電流i2 =9i1 =9i0 /10流過具 有電阻R3之1/9倍之阻抗值之電阻R4之增幅部V2。The amplifier 11 is equivalent to having an amplitude increasing portion V1 for controlling the voltage so that the current i 1 flowing through the resistor R3 is equal to the current i 0 /10 and a voltage having the same voltage as that of the amplifying portion V1 for making the current i 2 = 9i 1 = 9i 0 /10 flows through the amplification portion V2 of the resistor R4 having an impedance value 1/9 times the resistance R3.
亦即，增幅部V1以振幅度1將檢測線20a檢測之共用模式電流之十分之一之電流i0 /10加以增幅，使電流經由電阻R3與電容器C4流至接地E1。又，增幅部V2使流過電阻R3之電流i1 =i0 /10之9倍之電流i2 =9i1 =9i0 /10經由電阻R4與電容器C4流至接地E1。That is, the amplification unit V1 amplifies the current i 0 /10 which is one tenth of the common mode current detected by the detection line 20a by the amplitude degree 1, and causes the current to flow to the ground E1 via the resistor R3 and the capacitor C4. Further, the amplifying portion V2 causes the current i 2 = 9i 1 = 9i 0 / 10 which is 9 times the current i 1 = i 0 / 10 flowing through the resistor R3 to flow to the ground E1 via the resistor R4 and the capacitor C4.
是以，在接地E1流過與共用模式電流i0 相同值之電流i0 ，因此可降低流出至交流系統之共用模式電流。因此，可降低產生之雜訊，謀求低價且小型化。Therefore, the current flowing through the ground E1 i 0 the same value as the common-mode current i 0, thus reducing the common mode current flows to the AC systems. Therefore, the generated noise can be reduced, and the price can be reduced and miniaturized.
又，以二極體D8及電容器C3使電晶體11a,11b之射極之輸出整流平滑，將電阻R1與電阻R2之連接點之電壓檢測為放大器11之輸出振幅，根據檢測之輸出振幅檢測訊號使可變直流電源30之直流輸出電壓Vr為可變。是以，用以抵銷共用模式電流之補償電流較小時，放大器11之電源電壓變小，可降低放大器11損耗。Further, the output of the emitters of the transistors 11a and 11b is rectified and smoothed by the diode D8 and the capacitor C3, and the voltage at the junction of the resistor R1 and the resistor R2 is detected as the output amplitude of the amplifier 11, and the output amplitude detection signal is detected based on the detected output. The DC output voltage Vr of the variable DC power source 30 is made variable. Therefore, when the compensation current for canceling the common mode current is small, the power supply voltage of the amplifier 11 becomes small, and the loss of the amplifier 11 can be reduced.
此外，本發明並不限於實施例1至實施例3之主動濾波器裝置。在實施例2，在電容器C1串聯電阻R3、在電容器C2串聯電阻R4之構成亦可。Further, the present invention is not limited to the active filter devices of Embodiments 1 to 3. In the second embodiment, the capacitor C1 may be connected in series with the resistor R3, and the capacitor C2 may be connected in series with the resistor R4.
本發明可利用於以無停電電源裝置或通訊用電源裝置為代表之電力轉換裝置。The present invention can be utilized in a power conversion device typified by an uninterruptible power supply device or a communication power supply device.
1‧‧‧三相交流電源1‧‧‧Three-phase AC power supply
1a‧‧‧R相用電源線1a‧‧‧R phase power cord
1b‧‧‧S相用電源線1b‧‧‧S phase power cord
1c‧‧‧T相用電源線1c‧‧‧T phase power cord
3‧‧‧電力轉換裝置3‧‧‧Power conversion device
4‧‧‧對地間電容4‧‧‧Inter-ground capacitance
5‧‧‧負載5‧‧‧load
7,7a,7b,7-1,7-2,7-3‧‧‧主動濾波器裝置7,7a,7b,7-1,7-2,7-3‧‧‧active filter device
10,20‧‧‧電流變壓器10,20‧‧‧current transformer
10a,20a‧‧‧檢測線10a, 20a‧‧‧ test line
30‧‧‧可變直流電源30‧‧‧Variable DC power supply
11a,11b‧‧‧電晶體11a, 11b‧‧‧Optoelectronics
R1,R2,R3,R4‧‧‧電阻R1, R2, R3, R4‧‧‧ resistance
C1,C2‧‧‧低頻分離電容器C1, C2‧‧‧ low frequency separation capacitor
C0,C3,C4,C5,C6‧‧‧電容器C0, C3, C4, C5, C6‧‧ ‧ capacitors
Q1~Q6‧‧‧開關元件Q1~Q6‧‧‧Switching elements
D1~D8‧‧‧二極體D1~D8‧‧‧ diode
L1~L3‧‧‧抗流線圈L1~L3‧‧‧ anti-flow coil
圖1係實施例1之主動濾波器裝置及電力轉換裝置的構成圖。Fig. 1 is a configuration diagram of an active filter device and a power conversion device of the first embodiment.
圖2係顯示與實施例1之主動濾波器裝置之電容器C3之兩端電壓對應使可變直流電源之直流輸出電壓為可變之情況的圖。Fig. 2 is a view showing a state in which the DC output voltage of the variable DC power source is made variable in accordance with the voltage across the capacitor C3 of the active filter device of the first embodiment.
圖3係實施例2之主動濾波器裝置及電力轉換裝置的構成圖。Fig. 3 is a view showing the configuration of an active filter device and a power conversion device of the second embodiment;
圖4係實施例3之主動濾波器裝置及電力轉換裝置的構成圖。4 is a configuration diagram of an active filter device and a power conversion device of the third embodiment.
圖5係習知主動濾波器裝置及電力轉換裝置之例1的構成圖。Fig. 5 is a configuration diagram of a first example of a conventional active filter device and a power conversion device.
圖6係習知主動濾波器裝置之直流電源之具體構成例1。Fig. 6 is a specific configuration example 1 of a DC power supply of a conventional active filter device.
圖7係習知主動濾波器裝置之直流電源之具體構成例2。Fig. 7 is a specific configuration example 2 of a DC power supply of a conventional active filter device.
1‧‧‧三相交流電源1‧‧‧Three-phase AC power supply
1a‧‧‧R相用電源線1a‧‧‧R phase power cord
1b‧‧‧S相用電源線1b‧‧‧S phase power cord
1c‧‧‧T相用電源線1c‧‧‧T phase power cord
3‧‧‧電力轉換裝置3‧‧‧Power conversion device
3a‧‧‧殼體3a‧‧‧shell
4‧‧‧對地間電容4‧‧‧Inter-ground capacitance
5‧‧‧負載5‧‧‧load
7-1‧‧‧主動濾波器裝置7-1‧‧‧Active filter device
10‧‧‧電流變壓器10‧‧‧current transformer
10a‧‧‧檢測線10a‧‧‧Test line
11‧‧‧放大器11‧‧‧Amplifier
11a,11b‧‧‧電晶體11a, 11b‧‧‧Optoelectronics
30‧‧‧可變直流電源30‧‧‧Variable DC power supply
C1‧‧‧低頻分離電容器C1‧‧‧ low frequency separation capacitor
C0,C3,C5‧‧‧電容器C0, C3, C5‧‧ ‧ capacitor
D1~D8‧‧‧二極體D1~D8‧‧‧ diode
E‧‧‧接地端子E‧‧‧ Grounding terminal
E1‧‧‧接地E1‧‧‧ Grounding
L1~L3‧‧‧抗流線圈L1~L3‧‧‧ anti-flow coil
Q1~Q6‧‧‧開關元件Q1~Q6‧‧‧Switching elements
R1,S1,T1‧‧‧端子R1, S1, T1‧‧‧ terminals
R1,R2‧‧‧電阻R1, R2‧‧‧ resistance
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009107621A JP5347688B2 (en) | 2009-04-27 | 2009-04-27 | Active filter device and power conversion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201112602A TW201112602A (en) | 2011-04-01 |
| TWI450488B true TWI450488B (en) | 2014-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW099108860A TWI450488B (en) | 2009-04-27 | 2010-03-25 | Active filter device and power conversion device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5347688B2 (en) |
| KR (1) | KR101223513B1 (en) |
| CN (1) | CN101873057B (en) |
| TW (1) | TWI450488B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10126350B2 (en) | 2016-09-21 | 2018-11-13 | Hamilton Sunstrand Corporation | Detection of damper resistor degradation and failures |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2980318B1 (en) * | 2011-09-16 | 2017-06-09 | Valeo Systemes De Controle Moteur | METHOD OF REDUCING COMMON MODE CURRENT |
| JP5547170B2 (en) * | 2011-12-28 | 2014-07-09 | 本田技研工業株式会社 | Load drive device |
| JP5316656B2 (en) * | 2012-01-27 | 2013-10-16 | ダイキン工業株式会社 | Power conversion circuit |
| JP2014241711A (en) * | 2013-04-19 | 2014-12-25 | シャフナー・エーエムファウ・アクチェンゲゼルシャフト | Active EMC filter |
| CN103731015B (en) * | 2014-01-21 | 2018-09-14 | 江苏优控新能源科技有限公司 | Inhibit the current feedback active power filter of frequency conversion speed-adjusting system common-mode voltage |
| CN104993470B (en) * | 2015-06-29 | 2017-09-19 | 南京航空航天大学 | A kind of control mode of the active filter of DC link |
| DE102015219037B4 (en) * | 2015-10-01 | 2020-09-03 | Siemens Healthcare Gmbh | Method and device for acquiring bioelectrical signals |
| DE102018204222A1 (en) * | 2017-03-21 | 2018-09-27 | Kabushiki Kaisha Toshiba | Energy conversion device and energy conversion system |
| JP6797748B2 (en) * | 2017-03-21 | 2020-12-09 | 株式会社東芝 | Power converter and power conversion system |
| KR102084050B1 (en) * | 2018-02-01 | 2020-03-03 | 엘지전자 주식회사 | Power supply of an air conditioner |
| DE102019129413B4 (en) * | 2019-10-31 | 2021-10-07 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Compensation device for leakage currents |
| TWI738105B (en) * | 2019-11-04 | 2021-09-01 | 車王電子股份有限公司 | Power supply system |
| CN115333502A (en) * | 2022-10-13 | 2022-11-11 | 湖北工业大学 | Multistage parallel active common mode interference filter and control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335669A (en) * | 2000-07-26 | 2002-02-13 | 马鞍山市华宝电气公司 | Tracking active power filter |
| JP2008312429A (en) * | 2007-05-16 | 2008-12-25 | Sanken Electric Co Ltd | Active filter device and power converter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3277166B2 (en) * | 1998-09-08 | 2002-04-22 | 株式会社東芝 | Power converter |
| JP2000224869A (en) * | 1999-01-29 | 2000-08-11 | Toshiba Corp | Noise reduction circuit |
| JP2004032885A (en) * | 2002-06-25 | 2004-01-29 | Sanken Electric Co Ltd | Rectifying circuit, noise reduction device, and power conversion device |
| JP5070929B2 (en) * | 2007-05-16 | 2012-11-14 | サンケン電気株式会社 | Active filter device and power conversion device |
| JP5119824B2 (en) * | 2007-09-20 | 2013-01-16 | サンケン電気株式会社 | Active filter device and power conversion device |
| JP5218029B2 (en) * | 2008-12-25 | 2013-06-26 | サンケン電気株式会社 | Active filter device and power conversion device |
-
2009
- 2009-04-27 JP JP2009107621A patent/JP5347688B2/en not_active Expired - Fee Related
-
2010
- 2010-03-23 CN CN2010101446473A patent/CN101873057B/en active Active
- 2010-03-25 TW TW099108860A patent/TWI450488B/en not_active IP Right Cessation
- 2010-03-25 KR KR1020100026696A patent/KR101223513B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335669A (en) * | 2000-07-26 | 2002-02-13 | 马鞍山市华宝电气公司 | Tracking active power filter |
| JP2008312429A (en) * | 2007-05-16 | 2008-12-25 | Sanken Electric Co Ltd | Active filter device and power converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10126350B2 (en) | 2016-09-21 | 2018-11-13 | Hamilton Sunstrand Corporation | Detection of damper resistor degradation and failures |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201112602A (en) | 2011-04-01 |
| JP5347688B2 (en) | 2013-11-20 |
| CN101873057B (en) | 2013-03-06 |
| JP2010259247A (en) | 2010-11-11 |
| KR101223513B1 (en) | 2013-01-17 |
| KR20100118058A (en) | 2010-11-04 |
| CN101873057A (en) | 2010-10-27 |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |