TWI514762B - System connected to inverter device and its control method - Google Patents
System connected to inverter device and its control method Download PDFInfo
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- TWI514762B TWI514762B TW099124919A TW99124919A TWI514762B TW I514762 B TWI514762 B TW I514762B TW 099124919 A TW099124919 A TW 099124919A TW 99124919 A TW99124919 A TW 99124919A TW I514762 B TWI514762 B TW I514762B
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- 238000000034 method Methods 0.000 title claims description 9
- 239000003990 capacitor Substances 0.000 claims description 33
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- 238000010586 diagram Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 2
Classifications
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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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02M1/0003—Details of control, feedback or regulation circuits
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Description
本發明是關於系統連繫反相器裝置及系統連繫反相器裝置的控制方法者。The present invention relates to a method of controlling a system-connected inverter device and a system-connected inverter device.
在日本特開平11-298028號公報的第1圖，揭示著連接於太陽電池所構成的直流電源的反相器電路，為經由限流電阻及第1開關所構成的串聯電路，及並聯連接於此串聯電路或限流電阻的第2開關所構成的鍵控電路連接於電力系統，而在反相器電路與鍵控電路之間配置著包括感應器及電容器的濾波器的系統連繫反相器裝置。In the first diagram of Japanese Laid-Open Patent Publication No. Hei No. 11-298028, an inverter circuit connected to a DC power source formed of a solar cell is disclosed, which is a series circuit including a current limiting resistor and a first switch, and is connected in parallel. The key circuit of the series switch or the second switch of the current limiting resistor is connected to the power system, and the system connection of the filter including the inductor and the capacitor is arranged between the inverter circuit and the key circuit. Device.
專利文獻1：日本特開平11-298028號公報等第1圖Patent Document 1: Japanese Patent Laid-Open No. Hei 11-298028, and the like
在習知裝置中，將第1開關作成導通狀態之後，再將第2開關作成導通狀態時，則湧流流至濾波電容器。為了此，為了抑制此情形，必須減小限流電阻的電阻值，又必須提高電容器的充電電壓。又若使用電力額定大的限流電阻，則第1開關也必須為電流額定大者。In the conventional device, when the first switch is turned on and then the second switch is turned on, the inrush current flows to the smoothing capacitor. For this reason, in order to suppress this, it is necessary to reduce the resistance value of the current limiting resistor, and it is necessary to increase the charging voltage of the capacitor. In addition, if a current limiting resistor with a large power rating is used, the first switch must also have a larger current rating.
本發明的目的是在於提供一種不需要電力額定大的限流電阻及電流額定大的開關的系統連繫反相器裝置及該裝置的控制方法。SUMMARY OF THE INVENTION An object of the present invention is to provide a system-connected inverter device that does not require a power-rated rated current limiting resistor and a current-rated switch, and a control method of the same.
本發明的一種系統連繫反相器裝置，將連接於直流電源的反相器電路，經由以限流電阻及第1開關所構成的串聯電路，以及與該串聯電路的限流電阻或該串聯電路並聯連接的第2開關所構成的鍵控電路被連接於電力系統，且在反相器電路與鍵控電路之間配設有濾波電容器，作為改良對象。在本發明及方法中，控制反相器電路的控制電路，原在第1開關成為導通狀態之後，一直到第2開關成為導通狀態為止，使反相器電路的輸出電流成為零的方式，進行控制反相器電路。如此地，第1開關成為導通狀態之後，一直到第2開關成為導通狀態為止(開始起動期間)，使得反相器電路的輸出電流成為零的方式，進行控制反相器電路，則將第2開關作成導通狀態時，可阻止湧流流進濾波電容器。結果，為了湧流對策，不必使用電力額定大的限流電阻，或是不必準備電流額定大的開關。A system-connected inverter device of the present invention connects an inverter circuit connected to a DC power source via a series circuit composed of a current limiting resistor and a first switch, and a current limiting resistor or the series connection with the series circuit A key control circuit composed of a second switch in which the circuits are connected in parallel is connected to the power system, and a filter capacitor is disposed between the inverter circuit and the key control circuit as an improvement target. In the present invention and the method, the control circuit for controlling the inverter circuit is configured such that the output current of the inverter circuit becomes zero until the second switch is turned on until the second switch is turned on. Control the inverter circuit. In this way, after the first switch is turned on, the second inverter is turned on (starting start period), and the output current of the inverter circuit is zero, and the inverter circuit is controlled. When the switch is turned on, it prevents the inrush current from flowing into the filter capacitor. As a result, in order to countermeasure against the inrush current, it is not necessary to use a current limiting resistor having a large electric power rating, or it is not necessary to prepare a switch having a large current rating.
在上述開始起動期間，為了使得反相器電路的輸出電路成為零的方式，例如將控制電路作成流在濾波電容器與鍵控電路之間的輸出電流成為零的方式，進行反饋控制就可以。又在控制電路，在起動期間，作成流在濾波電容器與鍵控電路之間的輸出電流成為零的方式，進行前饋控制也可以。具體而言，流著包括濾波電容器的充電電流的反相器電流的方式進行前饋控制就可以。During the start-up period described above, in order to make the output circuit of the inverter circuit zero, for example, the control circuit may be configured such that the output current flowing between the smoothing capacitor and the keying circuit becomes zero, and feedback control may be performed. Further, in the control circuit, during the startup period, the output current flowing between the smoothing capacitor and the keying circuit is made zero, and feedforward control may be performed. Specifically, feedforward control may be performed in such a manner that an inverter current including a charging current of the filter capacitor flows.
以下，參照圖式來詳述本發明的實施形態。第1圖是表示將利用反饋控制的本發明的系統連繫反相器裝置適用於太陽光發電系統的實施形態的基本構成的電路，第2圖是表示控制電路的構成的圖式。在第1圖中，直流電源1是由太陽電池所構成的直流電源。又，來自直流電源1的直流電力是藉由反相器電路2被轉換成交流電力。反相器電路2是並串連接著一對電晶體串聯地連接所成的兩個電晶體串聯電路，各電晶體串聯電路的中間點為成為交流輸出端子的公知反相器電路。包括於兩個電晶體串聯電路的複製電晶體，是藉由自控制電路10給予反相器電路2的選通信號G1，導通被控制。若為正常時，則直流電源1的直流電力是藉由反相器電路2被轉換成交流電力而被供應至商用電力系統。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a circuit showing a basic configuration of an embodiment in which a system-connected inverter device of the present invention using feedback control is applied to a solar power generation system, and FIG. 2 is a view showing a configuration of a control circuit. In Fig. 1, the DC power source 1 is a DC power source composed of a solar battery. Further, the DC power from the DC power source 1 is converted into AC power by the inverter circuit 2. The inverter circuit 2 is a two-series series circuit in which a pair of transistors are connected in series in parallel, and an intermediate point of each transistor series circuit is a known inverter circuit that becomes an AC output terminal. The replica transistor included in the two transistor series circuits is controlled by the gate signal G1 given to the inverter circuit 2 from the control circuit 10. If it is normal, the DC power of the DC power source 1 is supplied to the commercial power system by being converted into AC power by the inverter circuit 2.
在反相器電路2的輸出部，配置有感應器4與濾波電容器5所構成的LC濾波電路。感應器4被串聯連接於反相器電路2的輸出，而濾波電容器5是被連接於感應器4的一端與接地間。在感應器4與濾波電容器5之連接點與商用電力系統9之間，配置有鍵控電路SW。鍵控電路SW是由：限流電阻7及第1開關8的串聯電路，與並聯連接於該串聯電路的第2開關6所構成。第1開關8與第2開關6，是藉由來自控制電路10的控制信號A2及A1，通斷被控制。第1及第2開關是機械式開關。在反相器電路2與感應器4之間，配置有檢測出反相器電路2的輸出電流的第1電流檢測器3，而使得反相器電流11被輸入至控制電路10。又，由感應器4與電容器5之連接點被檢測有反相器電路2的輸出電壓，而使得反相器電壓V1被輸入至控制電路10。An LC filter circuit including the inductor 4 and the smoothing capacitor 5 is disposed at an output portion of the inverter circuit 2. The inductor 4 is connected in series to the output of the inverter circuit 2, and the filter capacitor 5 is connected between one end of the inductor 4 and the ground. A keying circuit SW is disposed between the connection point of the inductor 4 and the smoothing capacitor 5 and the commercial power system 9. The keying circuit SW is composed of a series circuit of the current limiting resistor 7 and the first switch 8, and a second switch 6 connected in parallel to the series circuit. The first switch 8 and the second switch 6 are controlled to be turned on and off by the control signals A2 and A1 from the control circuit 10. The first and second switches are mechanical switches. Between the inverter circuit 2 and the inductor 4, a first current detector 3 that detects an output current of the inverter circuit 2 is disposed, and the inverter current 11 is input to the control circuit 10. Further, the output voltage of the inverter circuit 2 is detected by the connection point of the inductor 4 and the capacitor 5, so that the inverter voltage V1 is input to the control circuit 10.
第2圖是表示構成於控制電路10內的反相器電路2的選通信號發生電路GSC的構成。在該選通信號發生電路GSC中，將反相器電壓V1經90°超前要素AE超前90°相位，又在振幅調整器AA，藉此，製作相當於濾波電容器5的電容器電流的電容器電流相當值Ic。又，在反相器電壓V1與電流基準Iref 之乘算值，在相加電容器電流相當值Ic的信號，相加反相器電流I1而來製作加法信號，而將在放大器Amp放大的加法信號的信號輸入至脈寬調變電路PWM來製作反相器選通信號G1。在此例中，進行使用如此地所製作的反相器選通信號G1的前饋控制。亦即，在本實施形態中，第1開關8成為導通狀態之後，一直到第2開關6成為導通狀態為止，反相器電路2的輸出電流I成為零的方式(流在濾波電容器5與鍵控電路SW之間的輸出電流I成為零的方式)，來進行前饋控制。第3圖是表示本實施的形態動作波形。如第3(5)圖所示地，反相器電路2的輸出電流I，是一直到第2開關6成為導通狀態為止成為0A。其結果，湧流不會流在濾波電容器5。Fig. 2 is a view showing a configuration of a gate signal generating circuit GSC of an inverter circuit 2 formed in the control circuit 10. In the strobe signal generating circuit GSC, the inverter voltage V1 is advanced by 90° from the 90° leading element AE, and is again in the amplitude adjuster AA, whereby the capacitor current corresponding to the capacitor current of the smoothing capacitor 5 is made. The value Ic. Further, the multiplication value of the inverter voltage V1 and the current reference I ref is added to the signal of the capacitor current equivalent value Ic, the inverter current I1 is added to generate an addition signal, and the addition of the amplifier Amp is amplified. The signal signal is input to the pulse width modulation circuit PWM to fabricate the inverter strobe signal G1. In this example, feedforward control using the inverter strobe signal G1 thus produced is performed. In other words, in the present embodiment, after the first switch 8 is turned on, the output current I of the inverter circuit 2 becomes zero until the second switch 6 is turned on (flows through the filter capacitor 5 and the key). Feedforward control is performed by the way in which the output current I between the control circuits SW becomes zero. Fig. 3 is a view showing an operational waveform of the present embodiment. As shown in the third figure (5), the output current I of the inverter circuit 2 is 0A until the second switch 6 is turned on. As a result, the inrush current does not flow in the smoothing capacitor 5.
在第1圖的裝置的控制方法中，首先，將連接有限流電阻7的第1開關8作成導通狀態之後，並將反相器電路2作成導通(動作狀態)，使得反相器電流成為零(成為0A)而起動反相器電路2。當將輸出電流控制在0A，則反相器電壓V1是電壓，相位與商用電力系統成為相等，之後，即使將第2開關6作為導通狀態，也不會流動湧流。又，限流電阻7在第2開關6也成為導通狀態之前，電流為0A而不會消耗電力之故，因而可將電力額定小的電阻選定作為限流電阻7。In the control method of the apparatus of Fig. 1, first, after the first switch 8 connected to the finite current resistor 7 is turned on, the inverter circuit 2 is turned on (operating state) so that the inverter current becomes zero. The inverter circuit 2 is started (becomes 0A). When the output current is controlled to 0 A, the inverter voltage V1 is a voltage, and the phase is equal to the commercial power system. Thereafter, even if the second switch 6 is turned on, the inrush current does not flow. Further, the current limiting resistor 7 does not consume power until the second switch 6 is in the ON state, and the electric current is rated as the current limiting resistor 7.
第4圖是表示以習知的系統連繫反相器裝置所使用的控制電路的構成。當使用第4圖的習知的控制電路，則第1開關8成為導通狀態之後，一直到第2開關6成為導通狀態為止之期間，也繼續流著反相器直流I1，而反相器電壓V1與商用電力系統的電壓。相位不相之故，因而如第5(5)圖所示地，在第2開關5成為導通狀態之際，流著大的湧流I。Fig. 4 is a view showing the configuration of a control circuit used in a conventional system-connected inverter device. When the conventional control circuit of Fig. 4 is used, the first switch 8 is turned on, and until the second switch 6 is turned on, the inverter DC I1 continues to flow, and the inverter voltage is continued. V1 and the voltage of the commercial power system. Since the phase is not in phase, as shown in Fig. 5(5), when the second switch 5 is turned on, a large inrush current I flows.
第6圖是表示流在濾波電容器5與鍵控電路SW之間的輸出電流Io成為零的方式進行反饋控制的本發明的系統連繫反相器裝置的其他實施形態的構成，而第7圖是表示此實施形態的選通信號發生電路GSC的構成。在第6圖及第7圖中，在與表示於第1圖及第2圖的實施形態相同之構成，給予與第1圖及第2圖所給予的符號相同符號而省略說明。在本實施形態中，在感應器4與濾波電容器5之連接點與鍵控電路SW之間，設有檢測出反相器電路2的輸出電流的第2電流檢測器11。觀看第2電流檢測器11所檢測出的輸出電流Io，則可判定電流是否流在濾波電容器5。如此在第7圖的選通信號發生電路GSC中，流在濾波電容器5與鍵控電路SW(第1開關8)之間的輸出電流Io成為零的方式，進行反饋輸出電流Io。如此，在第7圖的選通信號發生電路GSC中，將以放大器Amp’放大輸出電流Io與輸出電流基準(=0)之相差分的數值，並將反相器電流I1相加於反相器電壓V1與電流基準Iref 之乘法值的數值上相加的數值輸入至放大器Amp。作成如此，流在濾波電容器5與鍵控電路SW(第1開關8)之間的輸出電流Io成為零的方式可進行反饋控制。又，當接通開關6之後，成為將電流流在電流之故，因而分開反饋電路，或是將放大器Amp’的增益作成0就可以。使用本實施形態也與先前的實施例同樣地[與第3(5)的信號同樣地]，可防止發生湧流。Fig. 6 is a view showing a configuration of another embodiment of the system-connected inverter device of the present invention which performs feedback control so that the output current Io flowing between the smoothing capacitor 5 and the keying circuit SW becomes zero, and Fig. 7 It is a configuration showing the strobe signal generating circuit GSC of this embodiment. In the sixth embodiment and the seventh embodiment, the same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals as those in the first and second embodiments, and the description thereof is omitted. In the present embodiment, the second current detector 11 that detects the output current of the inverter circuit 2 is provided between the connection point between the inductor 4 and the smoothing capacitor 5 and the key circuit SW. When the output current Io detected by the second current detector 11 is viewed, it is possible to determine whether or not current flows in the smoothing capacitor 5. As described above, in the strobe signal generating circuit GSC of Fig. 7, the output current Io flowing between the smoothing capacitor 5 and the keying circuit SW (the first switch 8) becomes zero, and the feedback output current Io is performed. Thus, in the strobe signal generating circuit GSC of Fig. 7, the amplifier Amp' amplifies the value of the output current Io and the output current reference (=0), and adds the inverter current I1 to the inversion. The value added by the value of the multiplied value of the voltage V1 and the current reference I ref is input to the amplifier Amp. In this manner, feedback control can be performed in such a manner that the output current Io flowing between the smoothing capacitor 5 and the key circuit SW (first switch 8) becomes zero. Further, when the switch 6 is turned on, the current flows in the current, so that the feedback circuit is separated, or the gain of the amplifier Amp' is made zero. Also in the present embodiment, similarly to the previous embodiment, [in the same manner as the signal of the third (5)], the inrush current can be prevented from occurring.
在上述實施形態中，對於由限流電阻7與第1開關8所構成的串聯電路並聯連接第2開關6，惟本發明是對於限流電阻7並聯連接第2開關6的情形，當然也可適用。In the above embodiment, the second switch 6 is connected in parallel to the series circuit including the current limiting resistor 7 and the first switch 8. However, the present invention is a case where the current limiting resistor 7 is connected in parallel to the second switch 6. Be applicable.
依照本發明，第1開關成為導通狀態之後，一直到第2開關成為導通狀態，反相器電路的輸出電流成為零的方式，用以控制反相器電路，當將第2開關成為導通狀態時，可阻止湧流流在濾波電容器的情形。結果，為了湧流對策，不必使用電力額定大的限流電阻，或是準備電流額定大的開關。According to the present invention, after the first switch is turned on, until the second switch is turned on, and the output current of the inverter circuit is zero, the inverter circuit is controlled to turn on the second switch. , can prevent the inrush current flow in the case of the filter capacitor. As a result, in order to countermeasure against the inrush current, it is not necessary to use a current limiting resistor of a large power rating or a switch having a large current rating.
1．．．直流電源1. . . DC power supply
2．．．反相器電路2. . . Inverter circuit
3．．．電流檢測器3. . . Current detector
4．．．感應器4. . . sensor
5．．．濾波電容器5. . . Filter capacitor
6．．．第2開關6. . . Second switch
7．．．限流電阻7. . . Current limiting resistor
8．．．第1開關8. . . First switch
9．．．商用電力系統9. . . Commercial power system
10．．．控制電路10. . . Control circuit
11．．．第2電流檢測器11. . . Second current detector
第1圖是表示將利用反饋控制的本發明的系統連繫反相器裝置適用於太陽光發電的本發明的第1實施形態的基本構成的電路圖。Fig. 1 is a circuit diagram showing a basic configuration of a first embodiment of the present invention in which a system-connected inverter device of the present invention using feedback control is applied to solar power generation.
第2圖是表示控制電路的構成的圖式。Fig. 2 is a view showing the configuration of a control circuit.
第3(1)圖至第3(5)圖是表示動作波形的圖式。Figures 3(1) to 3(5) are diagrams showing the operation waveforms.
第4圖是表示習知的控制電路的構成的圖式。Fig. 4 is a view showing the configuration of a conventional control circuit.
第5(1)圖至第5(5)圖是表示習知裝置的動作波形的圖式。Figs. 5(1) to 5(5) are diagrams showing operational waveforms of the conventional device.
第6圖是表示本發明的其他實施形態的構成的電路圖。Fig. 6 is a circuit diagram showing a configuration of another embodiment of the present invention.
第7圖是表示在第6圖的實施形態可使用的選通信號發生電路的構成的圖式。Fig. 7 is a view showing the configuration of a strobe signal generating circuit which can be used in the embodiment of Fig. 6.
1．．．直流電源1. . . DC power supply
2．．．反相器電路2. . . Inverter circuit
3．．．電流檢測器3. . . Current detector
4．．．感應器4. . . sensor
5．．．濾波電容器5. . . Filter capacitor
6．．．第2開關6. . . Second switch
7．．．限流電阻7. . . Current limiting resistor
8．．．第1開關8. . . First switch
9．．．商用電力系統9. . . Commercial power system
10．．．控制電路10. . . Control circuit
A1、A2．．．控制信號A1, A2. . . control signal
SW．．．鍵控電路SW. . . Keying circuit
G1．．．選通信號G1. . . Gating signal
I1．．．反相器電流I1. . . Inverter current
V1．．．反相器電壓V1. . . Inverter voltage
Claims (7)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009176907A JP4913849B2 (en) | 2009-07-29 | 2009-07-29 | System-linked inverter device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201112631A TW201112631A (en) | 2011-04-01 |
| TWI514762B true TWI514762B (en) | 2015-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW099124919A TWI514762B (en) | 2009-07-29 | 2010-07-28 | System connected to inverter device and its control method |
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| Country | Link |
|---|---|
| JP (1) | JP4913849B2 (en) |
| KR (1) | KR20110013221A (en) |
| CN (1) | CN101989747B (en) |
| TW (1) | TWI514762B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868764B (en) * | 2014-02-26 | 2017-08-04 | 全汉企业股份有限公司 | Inverter and its power conversion method |
| JP6480849B2 (en) * | 2015-10-26 | 2019-03-13 | 山洋電気株式会社 | Grid-connected inverter device |
| CN107346933B (en) * | 2016-05-06 | 2019-06-25 | 华润矽威科技（上海）有限公司 | Feedforward control circuit and power control system |
| KR20190033673A (en) | 2017-09-21 | 2019-04-01 | 서울과학기술대학교 산학협력단 | System and method for controlling grid-connected system of distributed generation using integral state feedback controller |
| CN109462327A (en) * | 2018-12-10 | 2019-03-12 | 上海交通大学 | For Five-level converter exchange side charging soft starting circuit and method |
| CN110190634B (en) * | 2019-05-30 | 2021-06-01 | 神驰机电股份有限公司 | Phase synchronization method for parallel operation of multiple generator sets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5574632A (en) * | 1994-02-11 | 1996-11-12 | U.S. Philips Corporation | Power supply comprising a circuit for limiting inrush currents |
| TW200627780A (en) * | 2005-01-12 | 2006-08-01 | Masakazu Ushijima | Current-mode resonant inverter circuit |
| US7525293B1 (en) * | 2004-12-06 | 2009-04-28 | Marvell International Ltd. | Power supply switching circuit for a halogen lamp |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2679135B2 (en) * | 1988-07-15 | 1997-11-19 | スズキ株式会社 | Brake device for strut suspension |
| JP2783771B2 (en) * | 1995-07-13 | 1998-08-06 | 株式会社東芝 | Starting operation method of grid-connected inverter device |
| JPH10271688A (en) * | 1997-03-26 | 1998-10-09 | Toshiba Fa Syst Eng Kk | Inverter device |
| JP3615966B2 (en) * | 1999-07-13 | 2005-02-02 | 三菱重工業株式会社 | System linkage inverter device |
-
2009
- 2009-07-29 JP JP2009176907A patent/JP4913849B2/en active Active
-
2010
- 2010-07-06 KR KR1020100064854A patent/KR20110013221A/en active IP Right Grant
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- 2010-07-29 CN CN201010241849.XA patent/CN101989747B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5574632A (en) * | 1994-02-11 | 1996-11-12 | U.S. Philips Corporation | Power supply comprising a circuit for limiting inrush currents |
| US7525293B1 (en) * | 2004-12-06 | 2009-04-28 | Marvell International Ltd. | Power supply switching circuit for a halogen lamp |
| TW200627780A (en) * | 2005-01-12 | 2006-08-01 | Masakazu Ushijima | Current-mode resonant inverter circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201112631A (en) | 2011-04-01 |
| CN101989747B (en) | 2014-08-06 |
| KR20110013221A (en) | 2011-02-09 |
| JP4913849B2 (en) | 2012-04-11 |
| CN101989747A (en) | 2011-03-23 |
| JP2011035956A (en) | 2011-02-17 |
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