TWI584569B - Power supply apparatus with variable switching frequency - Google Patents
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Description
本發明係有關於一種電源供應裝置，特別是一種可變切換頻率的電源供應裝置。 The present invention relates to a power supply device, and more particularly to a power supply device with variable switching frequency.
電源供應裝置是一種非常常見的電子裝置；電源供應裝置提供電源予外部之電子裝置，藉以驅動外部之電子裝置；因此，電源供應裝置非常重要。 A power supply device is a very common electronic device; a power supply device supplies power to an external electronic device to drive an external electronic device; therefore, the power supply device is very important.
相關技術的電源供應裝置的脈衝寬度調變控制器係以定頻方式控制連接變壓器的電晶體開關；因此，在輸入電壓為低電壓時，有效值電流與峰值電流會較大，較低耐流的功率元件不能被使用；許多電能能量變成了熱能，變壓器容易進入飽和狀態而失去電感特性。 The pulse width modulation controller of the related art power supply device controls the transistor switch of the connection transformer in a fixed frequency manner; therefore, when the input voltage is a low voltage, the RMS current and the peak current are large, and the current resistance is low. The power components cannot be used; many of the electrical energy becomes thermal energy, and the transformer easily enters saturation and loses its inductive properties.
因此，相關技術的電源供應裝置在輸入電壓為低電壓時的效率不佳。 Therefore, the power supply device of the related art is inefficient when the input voltage is a low voltage.
為改善上述習知技術之缺點，本發明之目的在於提供一種可變切換頻率的電源供應裝置。 In order to improve the above disadvantages of the prior art, it is an object of the present invention to provide a power supply device having a variable switching frequency.
為達成本發明之上述目的，本發明之可變切換頻率的電源供應裝置包含：一主變壓器；一電壓偵測單元，該電壓偵測單元電性連接至該主變壓器；一脈衝寬度調變控制單元，該脈衝寬度調變控制單元電性連接至該電壓偵測單元；及一開關單元，該開關單元電性連接至該脈衝寬度調變控制單元及該主變壓器。其中依據該開關單元之一切換頻率，該主變壓器轉換一輸入電壓成為一輸出電壓；該電壓偵測單元偵測該輸入電壓並 通知該脈衝寬度調變控制單元；依據該輸入電壓之一電壓絕對值，該脈衝寬度調變控制單元控制該開關單元之該切換頻率。 To achieve the above object of the present invention, the variable switching frequency power supply device of the present invention comprises: a main transformer; a voltage detecting unit electrically connected to the main transformer; and a pulse width modulation control The pulse width modulation control unit is electrically connected to the voltage detecting unit; and a switching unit electrically connected to the pulse width modulation control unit and the main transformer. The main transformer converts an input voltage into an output voltage according to a switching frequency of the switching unit; the voltage detecting unit detects the input voltage and Notifying the pulse width modulation control unit; the pulse width modulation control unit controls the switching frequency of the switching unit according to an absolute value of the voltage of the input voltage.
再者，如上所述之可變切換頻率的電源供應裝置，其中當該輸入電壓之該電壓絕對值增加且大於一第一臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率成為一第一頻率；其中當該輸入電壓之該電壓絕對值增加且不大於該第一臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率不變；其中當該輸入電壓之該電壓絕對值減少且小於一第二臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率成為一第二頻率；其中當該輸入電壓之該電壓絕對值減少且不小於該第二臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率不變；其中該第一臨界電壓值及該第二臨界電壓值不相同，該第一頻率及該第二頻率不相同。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the pulse width modulation control unit controls the switching unit when the absolute value of the voltage of the input voltage increases and is greater than a first threshold voltage value Switching frequency, such that the switching frequency of the switching unit becomes a first frequency; wherein when the absolute value of the voltage of the input voltage increases and is not greater than the first threshold voltage value, the pulse width modulation control unit controls the switching unit The switching frequency is such that the switching frequency of the switching unit does not change; wherein when the absolute value of the voltage of the input voltage decreases and is less than a second threshold voltage value, the pulse width modulation control unit controls the switching unit Switching frequency, such that the switching frequency of the switching unit becomes a second frequency; wherein the pulse width modulation control unit controls the switching unit when the absolute value of the voltage of the input voltage decreases and is not less than the second threshold voltage value The switching frequency is such that the switching frequency of the switching unit does not change; wherein the first threshold voltage value and the second threshold Voltage values are not identical, the first frequency and the second frequency are different.
再者，如上所述之可變切換頻率的電源供應裝置，係應用於一交流電源供應裝置及一負載裝置，該可變切換頻率的電源供應裝置更包含：一輸入濾波單元，該輸入濾波單元電性連接至該主變壓器；及一輸入整流單元，該輸入整流單元電性連接至該輸入濾波單元。 Furthermore, the power supply device of the variable switching frequency as described above is applied to an AC power supply device and a load device, and the power supply device of the variable switching frequency further includes: an input filtering unit, the input filtering unit Electrically connected to the main transformer; and an input rectifying unit electrically connected to the input filtering unit.
再者，如上所述之可變切換頻率的電源供應裝置，更包含：一輸出整流單元，該輸出整流單元電性連接至該主變壓器；及一輸出濾波單元，該輸出濾波單元電性連接至該輸出整流單元及該負載裝置。 Furthermore, the variable switching frequency power supply device as described above further includes: an output rectifying unit electrically connected to the main transformer; and an output filtering unit electrically connected to the output filtering unit The output rectifying unit and the load device.
再者，如上所述之可變切換頻率的電源供應裝置，更包含：一電壓回授單元，該電壓回授單元電性連接至該輸出濾波單元、該負載裝置及該脈衝寬度調變控制單元；一穩壓單元，該穩壓單元電性連接至該主變壓器及該脈衝寬度調變控制單元；及一電磁干擾濾波單元，該電磁干擾濾波單元電性連接至 該交流電源供應裝置及該輸入整流單元。 Furthermore, the power supply device of the variable switching frequency as described above further includes: a voltage feedback unit electrically connected to the output filtering unit, the load device, and the pulse width modulation control unit a voltage stabilizing unit electrically connected to the main transformer and the pulse width modulation control unit; and an electromagnetic interference filtering unit electrically connected to the electromagnetic interference filtering unit The AC power supply device and the input rectifying unit.
再者，如上所述之可變切換頻率的電源供應裝置，其中該第一臨界電壓值可為例如但不限定為160伏特，該第二臨界電壓值可為例如但不限定為140伏特，該第一頻率可為例如但不限定為65KHz，該第二頻率可為例如但不限定為100KHz。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the first threshold voltage value may be, for example, but not limited to, 160 volts, and the second threshold voltage value may be, for example, but not limited to, 140 volts. The first frequency can be, for example, but not limited to, 65 KHz, and the second frequency can be, for example, but not limited to, 100 KHz.
再者，如上所述之可變切換頻率的電源供應裝置，其中該電壓偵測單元可為例如但不限定為一電壓取樣電路，該交流電源供應裝置之一輸出電源可為例如但不限定為在90伏特至265伏特之間。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the voltage detecting unit can be, for example but not limited to, a voltage sampling circuit, and one of the output power sources of the AC power supply device can be, for example but not limited to, Between 90 volts and 265 volts.
再者，如上所述之可變切換頻率的電源供應裝置，其中該脈衝寬度調變控制單元可為例如但不限定為一脈衝寬度調變控制器，該開關單元可為例如但不限定為一電晶體開關，該輸入濾波單元可為例如但不限定為一濾波電容，該輸入整流單元可為例如但不限定為一橋式整流器，該輸出整流單元可為例如但不限定為一二極體，該輸出濾波單元可為例如但不限定為一濾波電容，該電壓回授單元可為例如但不限定為一電壓回授電路，該穩壓單元可為例如但不限定為一穩壓電路，該電磁干擾濾波單元可為例如但不限定為一電磁干擾濾波器。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the pulse width modulation control unit may be, for example but not limited to, a pulse width modulation controller, which may be, for example but not limited to, a The input filter unit can be, for example but not limited to, a bridge rectifier, and the output rectifier unit can be, for example but not limited to, a diode. The output filtering unit can be, for example but not limited to, a voltage-sending circuit, for example, but not limited to, a voltage-supplied circuit, and the voltage-stabilizing unit can be, for example, but not limited to, a voltage stabilizing circuit. The electromagnetic interference filtering unit may be, for example but not limited to, an electromagnetic interference filter.
再者，如上所述之可變切換頻率的電源供應裝置，其中當該輸入電壓之該電壓絕對值大於一第三臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率成為一第三頻率；其中當該輸入電壓之該電壓絕對值不大於該第三臨界電壓值時，該脈衝寬度調變控制單元控制該開關單元之該切換頻率，使得該開關單元之該切換頻率成為一第四頻率；其中該第三頻率及該第四頻率不相同。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the pulse width modulation control unit controls the switching frequency of the switching unit when the absolute value of the voltage of the input voltage is greater than a third threshold voltage value The switching frequency of the switching unit becomes a third frequency; wherein when the absolute value of the voltage of the input voltage is not greater than the third threshold voltage, the pulse width modulation control unit controls the switching frequency of the switching unit The switching frequency of the switching unit is changed to a fourth frequency; wherein the third frequency and the fourth frequency are different.
再者，如上所述之可變切換頻率的電源供應裝置，其中該第三臨界電壓值可為例如但不限定為150伏特，該第三頻率可為例如但不限定為65KHz，該第四頻率可為例如但不限定為100KHz。 Furthermore, the power supply device of the variable switching frequency as described above, wherein the third threshold voltage value may be, for example but not limited to, 150 volts, and the third frequency may be, for example, but not limited to, 65 kHz, the fourth frequency It can be, for example but not limited to, 100 KHz.
本發明之功效在於改善電源供應器在輸入電壓為低電 壓時的效率。 The effect of the invention is to improve the power supply at the input voltage to be low The efficiency of pressing.
10‧‧‧可變切換頻率的電源供應裝置 10‧‧‧Variable switching frequency power supply unit
20‧‧‧交流電源供應裝置 20‧‧‧AC power supply unit
22‧‧‧輸出電源 22‧‧‧Output power supply
30‧‧‧負載裝置 30‧‧‧Loading device
102‧‧‧主變壓器 102‧‧‧ main transformer
104‧‧‧電壓偵測單元 104‧‧‧Voltage detection unit
106‧‧‧脈衝寬度調變控制單元 106‧‧‧Pulse width modulation control unit
108‧‧‧開關單元 108‧‧‧Switch unit
110‧‧‧輸入電壓 110‧‧‧Input voltage
112‧‧‧輸出電壓 112‧‧‧Output voltage
114‧‧‧輸入濾波單元 114‧‧‧Input Filter Unit
116‧‧‧輸入整流單元 116‧‧‧Input rectifier unit
118‧‧‧輸出整流單元 118‧‧‧Output rectifier unit
120‧‧‧輸出濾波單元 120‧‧‧Output filtering unit
122‧‧‧電壓回授單元 122‧‧‧Voltage feedback unit
124‧‧‧穩壓單元 124‧‧‧Stabilizer
126‧‧‧電磁干擾濾波單元 126‧‧‧Electromagnetic interference filtering unit
第一圖為本發明之可變切換頻率的電源供應裝置之第一實施例方塊圖。 The first figure is a block diagram of a first embodiment of a power supply device of a variable switching frequency of the present invention.
第二圖為本發明之可變切換頻率的電源供應裝置之第二實施例方塊圖。 The second figure is a block diagram showing a second embodiment of the power supply device of the variable switching frequency of the present invention.
請參考第一圖，其係為本發明之可變切換頻率的電源供應裝置之第一實施例方塊圖。一可變切換頻率的電源供應裝置10包含一主變壓器102、一電壓偵測單元104、一脈衝寬度調變控制單元106及一開關單元108。 Please refer to the first figure, which is a block diagram of a first embodiment of a power supply device with variable switching frequency according to the present invention. A variable switching frequency power supply device 10 includes a main transformer 102, a voltage detecting unit 104, a pulse width modulation control unit 106, and a switching unit 108.
該電壓偵測單元104電性連接至該主變壓器102；該脈衝寬度調變控制單元106電性連接至該電壓偵測單元104；該開關單元108電性連接至該脈衝寬度調變控制單元106及該主變壓器102。 The voltage detecting unit 104 is electrically connected to the main transformer 102; the pulse width modulation control unit 106 is electrically connected to the voltage detecting unit 104; the switching unit 108 is electrically connected to the pulse width modulation control unit 106. And the main transformer 102.
依據該開關單元108之一切換頻率，該主變壓器102轉換一輸入電壓110成為一輸出電壓112；該電壓偵測單元104偵測該輸入電壓110並通知該脈衝寬度調變控制單元106；依據該輸入電壓110之一電壓絕對值，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率。 The main transformer 102 converts an input voltage 110 into an output voltage 112 according to a switching frequency of the switching unit 108; the voltage detecting unit 104 detects the input voltage 110 and notifies the pulse width modulation control unit 106; The absolute value of one of the voltages 110 is input, and the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108.
在一第一具體實施例，當該輸入電壓110之該電壓絕對值大於一第三臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率成為一第三頻率。 In a first embodiment, when the absolute value of the voltage of the input voltage 110 is greater than a third threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108 such that the switching unit 108 The switching frequency becomes a third frequency.
當該輸入電壓110之該電壓絕對值不大於該第三臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率成為一第四頻率。 When the absolute value of the voltage of the input voltage 110 is not greater than the third threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108, so that the switching frequency of the switching unit 108 becomes a first Four frequencies.
其中，該第三頻率及該第四頻率不相同；該第三頻率小 於該第四頻率。該第三臨界電壓值可為例如但不限定為150伏特；該第三頻率可為例如但不限定為65KHz；該第四頻率可為例如但不限定為100KHz。 Wherein the third frequency and the fourth frequency are different; the third frequency is small At the fourth frequency. The third threshold voltage value can be, for example, but not limited to, 150 volts; the third frequency can be, for example, but not limited to, 65 KHz; the fourth frequency can be, for example, but not limited to, 100 KHz.
再者，在一第二具體實施例，當該輸入電壓110之該電壓絕對值增加且大於一第一臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率成為一第一頻率。 Furthermore, in a second embodiment, when the absolute value of the voltage of the input voltage 110 increases and is greater than a first threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108. The switching frequency of the switching unit 108 is made a first frequency.
當該輸入電壓110之該電壓絕對值增加且不大於該第一臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率不變。 When the absolute value of the voltage of the input voltage 110 increases and is not greater than the first threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108 such that the switching frequency of the switching unit 108 is not change.
當該輸入電壓110之該電壓絕對值減少且小於一第二臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率成為一第二頻率。 When the absolute value of the voltage of the input voltage 110 decreases and is less than a second threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108 such that the switching frequency of the switching unit 108 becomes one. Second frequency.
當該輸入電壓110之該電壓絕對值減少且不小於該第二臨界電壓值時，該脈衝寬度調變控制單元106控制該開關單元108之該切換頻率，使得該開關單元108之該切換頻率不變。 When the absolute value of the voltage of the input voltage 110 decreases and is not less than the second threshold voltage value, the pulse width modulation control unit 106 controls the switching frequency of the switching unit 108 such that the switching frequency of the switching unit 108 is not change.
其中，該第一臨界電壓值及該第二臨界電壓值不相同；該第一臨界電壓值大於該第二臨界電壓值。該第一頻率及該第二頻率不相同；該第一頻率小於該第二頻率。該第一臨界電壓值可為例如但不限定為160伏特，該第二臨界電壓值可為例如但不限定為140伏特，該第一頻率可為例如但不限定為65KHz，該第二頻率可為例如但不限定為100KHz。 The first threshold voltage value and the second threshold voltage value are different; the first threshold voltage value is greater than the second threshold voltage value. The first frequency and the second frequency are different; the first frequency is less than the second frequency. The first threshold voltage value may be, for example but not limited to, 160 volts, and the second threshold voltage value may be, for example, but not limited to, 140 volts, and the first frequency may be, for example, but not limited to, 65 kHz, and the second frequency may be For example, but not limited to 100 KHz.
上述該第二具體實施例之流程係類似於磁滯效應；藉此，該脈衝寬度調變控制單元106可避免頻繁地改變該開關單元108之該切換頻率，因此可保護該可變切換頻率的電源供應裝置10的零件。 The flow of the second embodiment described above is similar to the hysteresis effect; whereby the pulse width modulation control unit 106 can avoid frequently changing the switching frequency of the switching unit 108, thereby protecting the variable switching frequency. A component of the power supply unit 10.
請參考第二圖，其係為本發明之可變切換頻率的電源供應裝置之第二實施例方塊圖。第二圖所示之元件敘述與第一圖相似者，為簡潔因素，於此不再贅述。再者，該可變切換頻率 的電源供應裝置10係應用於一交流電源供應裝置20及一負載裝置30；該可變切換頻率的電源供應裝置10更包含一輸入濾波單元114、一輸入整流單元116、一輸出整流單元118、一輸出濾波單元120、一電壓回授單元122、一穩壓單元124及一電磁干擾濾波單元126。 Please refer to the second figure, which is a block diagram of a second embodiment of the power supply device of the variable switching frequency of the present invention. The components in the second figure are similar to those in the first figure, and are not conclusive for the sake of brevity. Furthermore, the variable switching frequency The power supply device 10 is applied to an AC power supply device 20 and a load device 30. The power supply device 10 of the variable switching frequency further includes an input filtering unit 114, an input rectifying unit 116, and an output rectifying unit 118. An output filtering unit 120, a voltage feedback unit 122, a voltage stabilizing unit 124, and an electromagnetic interference filtering unit 126.
該輸入濾波單元114電性連接至該主變壓器102；該輸入整流單元116電性連接至該輸入濾波單元114；該輸出整流單元18電性連接至該主變壓器102；該輸出濾波單元120電性連接至該輸出整流單元118及該負載裝置30；該電壓回授單元122電性連接至該輸出濾波單元120、該負載裝置30及該脈衝寬度調變控制單元106；該穩壓單元124電性連接至該主變壓器102及該脈衝寬度調變控制單元106；該電磁干擾濾波單元126電性連接至該交流電源供應裝置20及該輸入整流單元116。 The input filtering unit 114 is electrically connected to the main transformer 102; the input rectifying unit 116 is electrically connected to the input filtering unit 114; the output rectifying unit 18 is electrically connected to the main transformer 102; the output filtering unit 120 is electrically Connected to the output rectifying unit 118 and the load device 30; the voltage feedback unit 122 is electrically connected to the output filtering unit 120, the load device 30, and the pulse width modulation control unit 106; the voltage stabilizing unit 124 is electrically The electromagnetic interference filtering unit 126 is electrically connected to the AC power supply device 20 and the input rectifying unit 116. The electromagnetic interference filtering unit 126 is electrically connected to the main transformer 102 and the pulse width modulation control unit 106.
該電壓偵測單元104可為例如但不限定為一電壓取樣電路；該交流電源供應裝置20之一輸出電源22可為例如但不限定為在90伏特至265伏特之間；該脈衝寬度調變控制單元106可為例如但不限定為一脈衝寬度調變控制器；該開關單元108可為例如但不限定為一電晶體開關；該輸入濾波單元114可為例如但不限定為一濾波電容；該輸入整流單元116可為例如但不限定為一橋式整流器；該輸出整流單元118可為例如但不限定為一二極體；該輸出濾波單元120可為例如但不限定為一濾波電容；該電壓回授單元122可為例如但不限定為一電壓回授電路；該穩壓單元124可為例如但不限定為一穩壓電路；該電磁干擾濾波單元126可為例如但不限定為一電磁干擾濾波器。 The voltage detecting unit 104 can be, for example but not limited to, a voltage sampling circuit; the output power source 22 of the AC power supply device 20 can be, for example but not limited to, between 90 volts and 265 volts; The control unit 106 can be, for example but not limited to, a pulse width modulation controller; the switch unit 108 can be, for example but not limited to, a transistor switch; the input filter unit 114 can be, for example but not limited to, a filter capacitor; The input rectifying unit 116 can be, for example but not limited to, a bridge rectifier; the output rectifying unit 118 can be, for example but not limited to, a diode; the output filtering unit 120 can be, for example but not limited to, a filter capacitor; The voltage feedback unit 122 can be, for example but not limited to, a voltage feedback circuit; the voltage stabilization unit 124 can be, for example but not limited to, a voltage stabilization circuit; the electromagnetic interference filter unit 126 can be, for example but not limited to, an electromagnetic Interference filter.
第二圖所示之該電壓偵測單元104係電性連接至該主變壓器102及該輸入濾波單元114，因此該電壓偵測單元104偵測該輸入電壓110以得到該輸入電壓110之該電壓絕對值；然而，該電壓偵測單元104亦可電性連接至該交流電源供應裝置20，因此該電壓偵測單元104偵測該交流電源供應裝置20之該輸出電源22以得到該輸入電壓110(該輸出電源22)之該電壓絕對 值。 The voltage detecting unit 104 shown in the second figure is electrically connected to the main transformer 102 and the input filtering unit 114. Therefore, the voltage detecting unit 104 detects the input voltage 110 to obtain the voltage of the input voltage 110. The voltage detecting unit 104 can be electrically connected to the AC power supply device 20, so the voltage detecting unit 104 detects the output power 22 of the AC power supply device 20 to obtain the input voltage 110. The voltage of the output power supply 22 is absolutely value.
再者，該電壓偵測單元104亦可電性連接至該輸入整流單元116與該電磁干擾濾波單元126，或是可電性連接至該輸入整流單元116與該輸入濾波單元114。 Furthermore, the voltage detecting unit 104 can be electrically connected to the input rectifying unit 116 and the electromagnetic interference filtering unit 126 or can be electrically connected to the input rectifying unit 116 and the input filtering unit 114.
本發明包含下列特點(優點)： The present invention includes the following features (advantages):
1.當該輸入電壓110(該輸出電源22)之該電壓絕對值較大時，該開關單元108之該切換頻率較低；當該輸入電壓110(該輸出電源22)之該電壓絕對值較小時，該開關單元108之該切換頻率較高。 1. When the absolute value of the voltage of the input voltage 110 (the output power source 22) is large, the switching frequency of the switching unit 108 is low; when the input voltage 110 (the output power source 22) has an absolute value of the voltage The switching frequency of the switching unit 108 is high in an hour.
2.當該開關單元108之該切換頻率較高時，可以降低有效值電流與峰值電流，可以使用較低耐流的功率元件，磁通量可降低，因此可將激磁電感加大以改善效率，或者在相同的激磁電感之下，該主變壓器102的圈數可降低以使用較小的鐵芯以降低體積。 2. When the switching frequency of the switching unit 108 is high, the RMS current and the peak current can be reduced, and a power component with a lower current resistance can be used, and the magnetic flux can be reduced, so that the magnetizing inductance can be increased to improve the efficiency, or Under the same magnetizing inductance, the number of turns of the main transformer 102 can be reduced to use a smaller core to reduce the volume.
3.改善電源供應器在輸入電壓為低電壓時的效率。 3. Improve the efficiency of the power supply when the input voltage is low.
4.本發明適用於連續導通模式(continuous conduction mode)。 4. The present invention is applicable to a continuous conduction mode.
然以上所述者，僅為本發明之較佳實施例，當不能限定本發明實施之範圍，即凡依本發明申請專利範圍所作之均等變化與修飾等，皆應仍屬本發明之專利涵蓋範圍意圖保護之範疇。綜上所述，當知本發明已具有產業利用性、新穎性與進步性，又本發明之構造亦未曾見於同類產品及公開使用，完全符合發明專利申請要件，爰依專利法提出申請。 However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect. In summary, it is known that the present invention has industrial applicability, novelty and advancement, and the structure of the present invention has not been seen in similar products and public use, and fully complies with the requirements of the invention patent application, and is filed according to the patent law.
10‧‧‧可變切換頻率的電源供應裝置 10‧‧‧Variable switching frequency power supply unit
102‧‧‧主變壓器 102‧‧‧ main transformer
104‧‧‧電壓偵測單元 104‧‧‧Voltage detection unit
106‧‧‧脈衝寬度調變控制單元 106‧‧‧Pulse width modulation control unit
108‧‧‧開關單元 108‧‧‧Switch unit
110‧‧‧輸入電壓 110‧‧‧Input voltage
112‧‧‧輸出電壓 112‧‧‧Output voltage
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| TW103102439A TWI584569B (en) | 2014-01-23 | 2014-01-23 | Power supply apparatus with variable switching frequency |
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| TWI584569B true TWI584569B (en) | 2017-05-21 |
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Citations (4)
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|---|---|---|---|---|
| TWI251979B (en) * | 2004-08-27 | 2006-03-21 | System General Corp | Switching control circuit with variable switching frequency for primary-side-controlled power converters |
| TWM364897U (en) * | 2009-04-10 | 2009-09-11 | Top Victory Invest Ltd | Power supply |
| US7667526B2 (en) * | 2006-07-31 | 2010-02-23 | Infineon Technologies Austria Ag | Apparatus, system, and method for multifunctional pin in an integrated circuit |
| TW201145778A (en) * | 2010-06-11 | 2011-12-16 | System General Corp | Active-clamp circuit for quasi-resonant flyback power converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI251979B (en) * | 2004-08-27 | 2006-03-21 | System General Corp | Switching control circuit with variable switching frequency for primary-side-controlled power converters |
| US7667526B2 (en) * | 2006-07-31 | 2010-02-23 | Infineon Technologies Austria Ag | Apparatus, system, and method for multifunctional pin in an integrated circuit |
| TWM364897U (en) * | 2009-04-10 | 2009-09-11 | Top Victory Invest Ltd | Power supply |
| TW201145778A (en) * | 2010-06-11 | 2011-12-16 | System General Corp | Active-clamp circuit for quasi-resonant flyback power converter |
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