TWI465877B - Improvement of power conversion device and method - Google Patents
Improvement of power conversion device and method Download PDFInfo
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Description
本發明主要是有關於電源轉換技術，尤其是有關於功因改善裝置與方法，其藉由控制負載之電流與輸入電壓同頻率與同相位，進而達到功因改善之目的之技術領域。The invention mainly relates to a power conversion technology, in particular to a power factor improving device and method, which can achieve the purpose of improving the power factor by controlling the current of the load and the input voltage to be the same frequency and the same phase.
如第1圖所示，為習知電源轉換系統方塊圖，其有一市電10、全波整流器20、功因修正器50、電源轉換器30、負載40所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於功因修正器50的輸入端，功因修正器50的輸出端電性連接於電源轉換器30的輸入端，電源轉換器30的輸出端電性連接於負載40。其中，功因修正器50是用來使市電10的電壓電流同相並提供一穩定的直流電源給電源轉換器30；電源轉換器30主要用來提供負載所需的電流。如第1圖所示之電路架構雖可達到高功因，但其多串接一功因修正器50，不僅成本增加，也造成整體電路轉換效率降低。As shown in FIG. 1, it is a block diagram of a conventional power conversion system, which has a mains 10, a full-wave rectifier 20, a power factor corrector 50, a power converter 30, and a load 40. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power factor corrector 50. The output end of the power corrector 50 is electrically connected to the power supply. At the input of converter 30, the output of power converter 30 is electrically coupled to load 40. The power factor corrector 50 is used to make the voltage and current of the mains 10 in phase and provide a stable DC power to the power converter 30; the power converter 30 is mainly used to supply the current required by the load. Although the circuit architecture shown in FIG. 1 can achieve high power, the multi-string connection is due to the corrector 50, which not only increases the cost, but also reduces the overall circuit conversion efficiency.
另如第2(a)圖與第2(b)圖所示，為習知電源轉換系統方塊圖，其更包含一輸出電流控制功能，其由一市電10、全波整流器20、功因修正器50、電源轉換器30、負載40所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於功因修正器50的輸入端，功因修正器50的輸出端電性連接於電源轉換器30的輸入端，電源轉換器30的輸出端電性連接於負載40。其中，功因修正器50是用來使市電10的電壓電流同相並提供一穩定的直流電源給電源轉換器30；電源轉換器30主要用來提供負載所需的電流。如第2(a)圖所示，電源轉換器30更具有一電流控制端301，如第2(b)圖所示，電源轉換器30更具有2個電流控制端301、302，用以控制輸出電流之大小。如第2(a)圖與第2(b)圖所示之電路架構雖可達到高功因，但其多串接一功因修正器50，不僅成本增加，也造成整體電路轉換效率降低。In addition, as shown in FIG. 2(a) and FIG. 2(b), it is a block diagram of a conventional power conversion system, which further includes an output current control function, which is modified by a mains 10, a full-wave rectifier 20, and a power factor correction. The device 50, the power converter 30, and the load 40 are composed of. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power factor corrector 50. The output end of the power corrector 50 is electrically connected to the power supply. At the input of converter 30, the output of power converter 30 is electrically coupled to load 40. The power factor corrector 50 is used to make the voltage and current of the mains 10 in phase and provide a stable DC power to the power converter 30; the power converter 30 is mainly used to supply the current required by the load. As shown in FIG. 2(a), the power converter 30 further has a current control terminal 301. As shown in FIG. 2(b), the power converter 30 further has two current control terminals 301 and 302 for controlling. The magnitude of the output current. For example, the circuit architectures shown in Figures 2(a) and 2(b) can achieve high power, but the multi-string connection due to the corrector 50 not only increases the cost, but also reduces the overall circuit conversion efficiency.
一種電源轉換之功因改善裝置，至少包含一全波整流器、電源轉換器與一控制電路；其中，市電的輸出端電性連接於全波整流器的輸入端，全波整流器的輸出端電性連接於電源轉換器的輸入端與控制電路的輸入端，電源轉換器的輸出端電性連接於一負載，控制電路的輸出端電性連接於電源轉換器的電流控制端；其中，電源轉換器主要用來提供負載所需的電流，其更具有至少一電流控制端受控制器之控制用，用以輸出所預期之電流大小；控制電路可偵測全波整流器輸出電壓波形，同時控制電源轉換器的輸出電流和全波整流器輸出電壓波形同頻率且同相位。如所述之電源轉換裝置，其中電源轉換器是接收類比電壓來控制其輸出電流大小；控制電路至少包括一分壓電路，其將市電輸出電壓波形作分壓，再送入電源轉換器之電流控制端。如所述之電源轉換裝置，其中電源轉換器是接收PWM訊號來控制其輸出電流大小；控制電路至少包括一分壓電路與一PWM產生器，其將全波整流器輸出電壓波形作分壓再送入PWM產生器用以產生正比於全波整流器輸出電壓波形之PWM訊號，再送入電源轉換器之電流控制端。如所述之電源轉換裝置，其中電源轉換器至少包括一PWM控制積體電路、一功率開關、一二極體、一電感與一電阻所構成。如所述之電源轉換裝置，其中PWM控制積體電路至少有2個輸入端與1個輸出端；1個輸出端為一功率開關驅動端，2個輸入端為一電流感測端與一電流控制端；功率開關驅動端用以輸出PWM訊號來控制功率開關之動作，電流感測端用以量測功率開關之電流，電流控制端用以接收訊號來控制電源轉換器之輸出電流大小。如所述之電源轉換裝置，其中PWM控制積體電路至少有3個輸入端與1個輸出端；1個輸出端為一功率開關驅動端，3個輸入端為一電流感測端與第一電流控制端與第二電流控制端；功率開關驅動端用以輸出PWM訊號來控制功率開關之動作，電流感測端用以量測功率開關之電流，第一電流控制端用以接收控制器訊號，進而控制電源轉換器之輸出電流大小，第二電流控制端用以接收外部訊號，進而控制電源轉換器之輸出電流大小。The utility model relates to a power conversion improvement device, which comprises at least a full-wave rectifier, a power converter and a control circuit; wherein the output end of the mains is electrically connected to the input end of the full-wave rectifier, and the output of the full-wave rectifier is electrically connected The input end of the power converter is electrically connected to a load, and the output end of the control circuit is electrically connected to the current control end of the power converter; wherein the power converter is mainly The current required to supply the load, and at least one current control terminal is controlled by the controller for outputting the expected current magnitude; the control circuit can detect the full-wave rectifier output voltage waveform while controlling the power converter The output current and the full-wave rectifier output voltage waveform are the same frequency and in phase. The power conversion device as described, wherein the power converter receives the analog voltage to control the magnitude of the output current; the control circuit includes at least a voltage dividing circuit that divides the mains output voltage waveform and then supplies the current to the power converter. Control terminal. The power conversion device as described, wherein the power converter receives the PWM signal to control the magnitude of the output current; the control circuit includes at least a voltage dividing circuit and a PWM generator, which divides the full-wave rectifier output voltage waveform and sends the voltage waveform The PWM generator is used to generate a PWM signal proportional to the output voltage waveform of the full-wave rectifier, and then sent to the current control terminal of the power converter. The power conversion device as described above, wherein the power converter comprises at least a PWM control integrated circuit, a power switch, a diode, an inductor and a resistor. The power conversion device as described, wherein the PWM control integrated circuit has at least two input terminals and one output terminal; one output terminal is a power switch drive terminal, and the two input terminals are a current sensing terminal and a current The control terminal is configured to output a PWM signal to control the action of the power switch, the current sensing end is used to measure the current of the power switch, and the current control terminal is used to receive the signal to control the output current of the power converter. The power conversion device as described, wherein the PWM control integrated circuit has at least three input terminals and one output terminal; one output terminal is a power switch drive terminal, and three input terminals are a current sensing terminal and the first The current control end and the second current control end; the power switch drive end is used to output a PWM signal to control the action of the power switch, the current sense end is used to measure the current of the power switch, and the first current control end is used to receive the controller signal And controlling the output current of the power converter, and the second current control terminal is for receiving an external signal, thereby controlling the output current of the power converter.
一種電源轉換之功因改善方法，其可偵測市電輸出電壓波形並控制輸出至負載之電流和該市電輸出電壓同步，進而改善其功因。A method for improving power conversion, which can detect a mains output voltage waveform and control the current output to the load to be synchronized with the mains output voltage, thereby improving the power factor.
一種電源轉換之功因改善方法，其可偵測市電輸出電壓波形，並控制輸出至負載之電流和市電輸出電壓同步，也就是電壓與電流的頻率與相位均相同；更可由外部訊號控制輸出至負載之電流大小。A method for improving power conversion, which can detect a mains output voltage waveform, and control the output current to the load to be synchronized with the mains output voltage, that is, the voltage and current have the same frequency and phase; and can be controlled by an external signal to The current magnitude of the load.
上述之電源轉換之功因改善裝置及方法，其中負載可為LED燈。The above-mentioned power conversion conversion power improvement device and method, wherein the load can be an LED lamp.
如第3圖所示，為本專利所揭示之電源轉換之功因改善裝置之方塊圖，其由一市電10、全波整流器20、電源轉換器30、負載40與一控制電路60所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於電源轉換器30的輸入端與控制電路60的輸入端，電源轉換器30的輸出端電性連接於負載40，控制電路60的輸出端電性連接於電源轉換器30的電流控制端301。其中，電源轉換器30主要用來提供負載所需的電流，其更具有一電流控制端301受控制器60之控制用以輸出所預期之電流大小；控制電路60可偵測全波整流器20輸出電壓波形並控制電源轉換器30輸出和其同頻率且同相位的電流給負載40。依據能量守恆，市電10的電流波形就會和其電壓波形同步，故可達到功因改善之目的。如上所述之負載40可為一LED燈。As shown in FIG. 3, a block diagram of a power conversion improvement device for power conversion disclosed in the present patent is composed of a commercial power supply 10, a full-wave rectifier 20, a power converter 30, a load 40, and a control circuit 60. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power converter 30 and the input end of the control circuit 60, and the output end of the power converter 30 The output of the control circuit 60 is electrically connected to the current control terminal 301 of the power converter 30. The power converter 30 is mainly used to supply the current required by the load, and further has a current control terminal 301 controlled by the controller 60 for outputting the expected current magnitude; the control circuit 60 can detect the output of the full-wave rectifier 20 The voltage waveform controls the output of the power converter 30 and its current of the same frequency and in phase to the load 40. According to the conservation of energy, the current waveform of the mains 10 will be synchronized with its voltage waveform, so that the purpose of improving the power can be achieved. The load 40 as described above can be an LED light.
如第4圖所示，為本專利所揭示之電源轉換之功因改善裝置之第一較佳實施例之方塊圖，其由一市電10、全波整流器20、電源轉換器30、負載40與一控制電路60所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於電源轉換器30的輸入端與控制電路60的輸入端，電源轉換器30的輸出端電性連接於負載40，控制電路60的輸出端電性連接於電源轉換器30的電流控制端301。其中，電源轉換器30主要由一脈波寬度調變(PWM)控制積體電路310、一功率開關Q1、一二極體D5、一電感L1、一電容C2與一電阻R3所構成之降壓型轉換電路(Buck Circuit)。PWM控制積體電路310至少有3端：一功率開關驅動端GD、一電流感測端CS與一電流控制端CC。PWM控制積體電路310之功率開關驅動端GD用以輸出PWM訊號來控制功率開關之動作，PWM控制積體電路310之電流感測端CS用以量測功率開關之電流，PWM控制積體電路310之電流控制端CC用以接收類比電壓來控制電源轉換器30之輸出電流大小。在本第一較佳實施例中，控制電路60僅由電阻R1、R2構成一分壓電路，其將全波整流器20輸出電壓波形作分壓再送入PWM控制積體電路310之電流控制端CC，故電源轉換器30的輸出電流會和全波整流器20輸出電壓同頻率且同相位。依據能量守恆，市電10的電流波形就會和其電壓波形同步，故可達到功因改善之目的。As shown in FIG. 4, a block diagram of a first preferred embodiment of the power conversion improvement device for power conversion disclosed in the present patent is composed of a mains 10, a full-wave rectifier 20, a power converter 30, and a load 40. A control circuit 60 is formed. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power converter 30 and the input end of the control circuit 60, and the output end of the power converter 30 The output of the control circuit 60 is electrically connected to the current control terminal 301 of the power converter 30. The power converter 30 is mainly composed of a pulse width modulation (PWM) control integrated circuit 310, a power switch Q1, a diode D5, an inductor L1, a capacitor C2 and a resistor R3. Type conversion circuit (Buck Circuit). The PWM control integrated circuit 310 has at least three terminals: a power switch driving terminal GD, a current sensing terminal CS and a current control terminal CC. The power switch driving terminal GD of the PWM control integrated circuit 310 is used for outputting a PWM signal to control the action of the power switch. The current sensing terminal CS of the PWM control integrated circuit 310 is used for measuring the current of the power switch, and the PWM control integrated circuit is used. The current control terminal CC of the 310 is configured to receive an analog voltage to control the output current of the power converter 30. In the first preferred embodiment, the control circuit 60 forms a voltage dividing circuit only by the resistors R1 and R2, which divides the output voltage waveform of the full-wave rectifier 20 into a current control terminal of the PWM control integrated circuit 310. CC, so the output current of the power converter 30 will be the same frequency and in phase with the output voltage of the full-wave rectifier 20. According to the conservation of energy, the current waveform of the mains 10 will be synchronized with its voltage waveform, so that the purpose of improving the power can be achieved.
如第5圖所示，為本專利所揭示之電源轉換之功因改善裝置之第二較佳實施例之方塊圖，其由一市電10、全波整流器20、電源轉換器30、負載40與一控制電路60所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於電源轉換器30的輸入端與控制電路60的輸入端，電源轉換器30的輸出端電性連接於負載40，控制電路60的輸出端電性連接於電源轉換器30的電流控制端301。其中，電源轉換器30主要由一PWM控制積體電路310、一功率開關Q1、一二極體D5、一電感L1、一電容C2與一電阻R3所構成之降壓型轉換電路。PWM控制積體電路310至少有3端：一功率開關驅動端GD、一電流感測端CS與一電流控制端CC。PWM控制積體電路310之功率開關驅動端GD用以輸出PWM訊號來控制功率開關之動作，PWM控制積體電路310之電流感測端CS用以量測功率開關之電流，PWM控制積體電路310之電流控制端CC用以接收PWM波形來控制電源轉換器30之輸出電流大小。在本第二較佳實施例中，控制電路60是由電阻R1、R2與一PWM產生器610所構成，其將全波整流器20輸出電壓波形作分壓再送入PWM產生器610，用以產生正比於全波整流器20輸出電壓波形之PWM訊號，該PWM訊號再送至PWM控制積體電路310之電流控制端CC，故電源轉換器30的輸出電流會和全波整流器20輸出電壓同頻率且同相位。依據能量守恆，市電10的電流波形就會和其電壓波形同步，故可達到功因改善之目的。As shown in FIG. 5, a block diagram of a second preferred embodiment of the power conversion improvement device for power conversion disclosed in the present patent is composed of a commercial power supply 10, a full-wave rectifier 20, a power converter 30, and a load 40. A control circuit 60 is formed. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power converter 30 and the input end of the control circuit 60, and the output end of the power converter 30 The output of the control circuit 60 is electrically connected to the current control terminal 301 of the power converter 30. The power converter 30 is mainly composed of a PWM control integrated circuit 310, a power switch Q1, a diode D5, an inductor L1, a capacitor C2 and a resistor R3. The PWM control integrated circuit 310 has at least three terminals: a power switch driving terminal GD, a current sensing terminal CS and a current control terminal CC. The power switch driving terminal GD of the PWM control integrated circuit 310 is used for outputting a PWM signal to control the action of the power switch. The current sensing terminal CS of the PWM control integrated circuit 310 is used for measuring the current of the power switch, and the PWM control integrated circuit is used. The current control terminal CC of the 310 is configured to receive the PWM waveform to control the output current of the power converter 30. In the second preferred embodiment, the control circuit 60 is composed of resistors R1, R2 and a PWM generator 610, which divides the output voltage waveform of the full-wave rectifier 20 into a PWM generator 610 for generating Compared with the PWM signal of the output voltage waveform of the full-wave rectifier 20, the PWM signal is sent to the current control terminal CC of the PWM control integrated circuit 310, so the output current of the power converter 30 and the output voltage of the full-wave rectifier 20 are the same frequency and same. Phase. According to the conservation of energy, the current waveform of the mains 10 will be synchronized with its voltage waveform, so that the purpose of improving the power can be achieved.
如第6圖所示，為本專利所揭示之另一電源轉換之功因改善裝置之方塊圖，其由一市電10、全波整流器20、電源轉換器30、負載40與一控制電路60所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於電源轉換器30的輸入端與控制電路60的輸入端，電源轉換器30的輸出端電性連接於負載40，控制電路60的輸出端電性連接於電源轉換器30的電流控制端301。其中，電源轉換器30主要用來提供負載所需的電流，其更具有2個電流控制端301、302；其中一電流控制端301受控制器60之控制，另一電流控制端302可用作接收外部訊號用以控制所要輸出電流大小。控制電路60可偵測全波整流器20輸出電壓波形並控制電源轉換器30輸出和全波整流器20輸出電壓波形同頻率且同相位的電流給負載40。依據能量守恆，市電10的電流波形就會和其電壓波形同步，故可達到功因改善之目的。As shown in FIG. 6, a block diagram of another power conversion improvement device disclosed in the patent is provided by a mains 10, a full-wave rectifier 20, a power converter 30, a load 40, and a control circuit 60. composition. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power converter 30 and the input end of the control circuit 60, and the output end of the power converter 30 The output of the control circuit 60 is electrically connected to the current control terminal 301 of the power converter 30. Wherein, the power converter 30 is mainly used to supply the current required by the load, and further has two current control terminals 301, 302; one of the current control terminals 301 is controlled by the controller 60, and the other current control terminal 302 can be used as Receive external signals to control the amount of current to be output. The control circuit 60 can detect the output voltage waveform of the full-wave rectifier 20 and control the output of the power converter 30 and the output voltage waveform of the full-wave rectifier 20 at the same frequency and in phase to the load 40. According to the conservation of energy, the current waveform of the mains 10 will be synchronized with its voltage waveform, so that the purpose of improving the power can be achieved.
如第7圖所示，為本專利所揭示之電源轉換之功因改善裝置之第三較佳實施例之方塊圖，其由一市電10、全波整流器20、電源轉換器30、負載40與一控制電路60所組成。市電10的輸出端電性連接於全波整流器20的輸入端，全波整流器20的輸出端電性連接於電源轉換器30的輸入端與控制電路60的輸入端，電源轉換器30的輸出端電性連接於負載40，控制電路60的輸出端電性連接於電源轉換器30的電流控制端301。其中，電源轉換器30主要由一PWM控制積體電路310、一功率開關Q1、一二極體D5、一電感L1、一電容C2與一電阻R3所構成之降壓型轉換電路(Buck Circuit)。PWM控制積體電路310至少有4端：一功率開關驅動端GD、一電流感測端CS與兩電流控制端CC1、CC2。PWM控制積體電路310之功率開關驅動端GD用以輸出PWM訊號來控制功率開關之動作，PWM控制積體電路310之電流感測端CS用以量測功率開關之電流，PWM控制積體電路310之電流控制端CC1、CC2用以接收類比電壓或PWM訊號來控制電源轉換器30之輸出電流大小。在本第三較佳實施例中，控制電路60可由電阻R1、R2所構成，其將全波整流器20輸出電壓波形作分壓再送入PWM控制積體電路310之一電流控制端CC1；或控制電路60是由電阻R1、R2與一PWM產生器610所構成，其將全波整流器20輸出電壓波形作分壓再送入PWM產生器610用以產生正比於全波整流器20輸出電壓波形之PWM訊號，該PWM訊號再送至PWM控制積體電路310之一電流控制端CC1。故電源轉換器30的輸出電流會和全波整流器20輸出電壓同頻率且同相位。依據能量守恆，市電10的電流波形就會和其電壓波形同步，故可達到功因改善之目的。而另一電流控制端CC2可作為外部電流控制之用，另負載40若為LED燈，則該電流控制端CC2可作為調光使用；如此，該電源轉換裝置可省略一串接之功因修正器，確可同時兼具功因修正與調光控制之功能。As shown in FIG. 7, a block diagram of a third preferred embodiment of the power conversion improvement device for power conversion disclosed in the present patent is composed of a commercial power supply 10, a full-wave rectifier 20, a power converter 30, and a load 40. A control circuit 60 is formed. The output end of the mains 10 is electrically connected to the input end of the full-wave rectifier 20, and the output end of the full-wave rectifier 20 is electrically connected to the input end of the power converter 30 and the input end of the control circuit 60, and the output end of the power converter 30 The output of the control circuit 60 is electrically connected to the current control terminal 301 of the power converter 30. The power converter 30 is mainly composed of a PWM control integrated circuit 310, a power switch Q1, a diode D5, an inductor L1, a capacitor C2 and a resistor R3. . The PWM control integrated circuit 310 has at least four terminals: a power switch drive terminal GD, a current sense terminal CS and two current control terminals CC1, CC2. The power switch driving terminal GD of the PWM control integrated circuit 310 is used for outputting a PWM signal to control the action of the power switch. The current sensing terminal CS of the PWM control integrated circuit 310 is used for measuring the current of the power switch, and the PWM control integrated circuit is used. The current control terminals CC1 and CC2 of 310 are used to receive analog voltage or PWM signals to control the output current of the power converter 30. In the third preferred embodiment, the control circuit 60 can be composed of resistors R1 and R2, which divide the output voltage waveform of the full-wave rectifier 20 into a current control terminal CC1 of the PWM control integrated circuit 310; or control The circuit 60 is composed of resistors R1, R2 and a PWM generator 610, which divides the output voltage waveform of the full-wave rectifier 20 into a PWM generator 610 for generating a PWM signal proportional to the output voltage waveform of the full-wave rectifier 20 The PWM signal is sent to the current control terminal CC1 of the PWM control integrated circuit 310. Therefore, the output current of the power converter 30 will be at the same frequency and in phase with the output voltage of the full-wave rectifier 20. According to the conservation of energy, the current waveform of the mains 10 will be synchronized with its voltage waveform, so that the purpose of improving the power can be achieved. The other current control terminal CC2 can be used as an external current control. If the load 40 is an LED lamp, the current control terminal CC2 can be used as a dimming; thus, the power conversion device can omit a series of power factor corrections. It can also have the functions of power correction and dimming control at the same time.
10．．．市電10. . . Mains
20．．．全波整流器20. . . Full wave rectifier
30．．．電源轉換器30. . . Power converter
301．．．電流控制端301. . . Current control terminal
310．．．PWM控制積體電路310. . . PWM control integrated circuit
40．．．負載40. . . load
50．．．功因修正器50. . . Power factor corrector
60．．．控制電路60. . . Control circuit
610．．．PWM產生器610. . . PWM generator
C1、C2．．．電容C1, C2. . . capacitance
CC、CC1、CC2．．．電流控制端CC, CC1, CC2. . . Current control terminal
CS．．．電流感測端CS. . . Current sensing terminal
D1、D2、D3、D4、D5．．．二極體D1, D2, D3, D4, D5. . . Dipole
GD．．．功率開關驅動端GD. . . Power switch driver
L1．．．電感L1. . . inductance
Q1．．．功率開關Q1. . . Power switch
R1、R2、R3．．．電阻R1, R2, R3. . . resistance
第1圖：習知技術之方塊圖一Figure 1: Block diagram 1 of the prior art
第2(a)圖：習知技術之方塊圖二Figure 2(a): Block diagram 2 of the prior art
第2(b)圖：習知技術之方塊圖三Figure 2(b): Block diagram 3 of the prior art
第3圖：本發明所揭示之電源轉換裝置之方塊圖一Figure 3: Block diagram 1 of the power conversion device disclosed in the present invention
第4圖：第一較佳實施例Figure 4: First preferred embodiment
第5圖：第二較佳實施例Figure 5: Second preferred embodiment
第6圖：本發明所揭示之電源轉換裝置之方塊圖二Figure 6: Block diagram 2 of the power conversion device disclosed in the present invention
第7圖：第三較佳實施例Figure 7: Third preferred embodiment
10．．．市電10. . . Mains
20．．．全波整流器20. . . Full wave rectifier
30．．．電源轉換器30. . . Power converter
301．．．電流控制端301. . . Current control terminal
40．．．負載40. . . load
60．．．控制電路60. . . Control circuit
Claims (7)
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