CN107026571A - A switching power supply device - Google Patents
A switching power supply device Download PDFInfo
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- CN107026571A CN107026571A CN201611215277.1A CN201611215277A CN107026571A CN 107026571 A CN107026571 A CN 107026571A CN 201611215277 A CN201611215277 A CN 201611215277A CN 107026571 A CN107026571 A CN 107026571A
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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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M1/14—Arrangements for reducing ripples from DC 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rectifiers (AREA)
Abstract
一种开关电源装置，包括整流桥电路、脉冲变压器T、开关管T1、二次整流回路、第一电阻R1、第二电阻R2、第三电阻R3、第三电容和控制单元。整流桥电路包括：第一二极管D1、第二二极管D2、第三二极管D3、第四二极管D4、第一电容C1及第二电容C2。脉冲变压器T包括一次侧绕组L1、铁心T及二次侧绕组L2。二次整流回路包括第五二极管D5、第一磁珠SC1、第六二极管D6、第二磁珠SC2、第四电容C4、第四电阻R4、电感L及第五电容C5。本发明提供的一种开关电源装置，具有能有效抑制其自身电磁骚扰的特点，可应用于精密的电子仪器或设备。
A switching power supply device includes a rectifier bridge circuit, a pulse transformer T, a switch tube T1, a secondary rectification circuit, a first resistor R1, a second resistor R2, a third resistor R3, a third capacitor and a control unit. The rectifier bridge circuit includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1 and a second capacitor C2. The pulse transformer T includes a primary winding L1, an iron core T and a secondary winding L2. The secondary rectification circuit includes a fifth diode D5, a first magnetic bead SC1, a sixth diode D6, a second magnetic bead SC2, a fourth capacitor C4, a fourth resistor R4, an inductor L and a fifth capacitor C5. The switching power supply device provided by the invention has the characteristics of effectively suppressing its own electromagnetic disturbance, and can be applied to precise electronic instruments or equipment.
Description
技术领域technical field
本发明涉及一种开关电源装置，属开关电路技术领域The invention relates to a switching power supply device, which belongs to the technical field of switching circuits
背景技术Background technique
近年来，随着电力电子技术的发展，开关电源以小型、轻量和高效率的特点，被广泛应用于工业自动化控制、军工设备、科研设备、LED照明、工控设备、通讯设备、电力设备、仪器仪表等领域。In recent years, with the development of power electronics technology, switching power supplies are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, Instrumentation and other fields.
但是与线性电源相比，由于开关电源是利用半导体器件的高速通断来实现电压变换的，并通过控制开关管开通和关断的时间比率，以维持稳定输出电压，因此电源线路内易产生较强的传导和辐射电磁骚扰，不仅会干扰负载，也会对周围的其他电子设备产生干扰，影响其在精密仪器设备中的使用。However, compared with the linear power supply, because the switching power supply uses the high-speed on-off of the semiconductor device to realize the voltage conversion, and maintains a stable output voltage by controlling the time ratio of the switching tube on and off, so it is easy to generate relatively large voltage in the power line. Strong conduction and radiation electromagnetic disturbance will not only interfere with the load, but also interfere with other electronic equipment around, affecting its use in precision instruments and equipment.
发明内容Contents of the invention
本发明的目的是为了克服了现有技术的不足，提供一种开关电源装置，能有效抑制其自身的电磁骚扰，可应用于精密的电子仪器或设备。The object of the present invention is to overcome the deficiencies of the prior art and provide a switching power supply device that can effectively suppress its own electromagnetic disturbance and can be applied to precise electronic instruments or equipment.
为了解决上述技术问题，本发明是通过以下技术方案实现：In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions:
一种开关电源装置，包括：整流桥电路、脉冲变压器、开关管、二次整流回路、第一电阻、第二电阻、第三电阻、第三电容和控制单元。所述整流桥电路的输出端的一端连接脉冲变压器的一次绕组，另一端连接开关管的发射极；开关管的集电极连接脉冲变压器的一次绕组的另一端；开关管的基极连接控制单元的输出端；第三电容和第三电阻串联，第三电容的另一端连接开关管的集电极，第三电阻的另一端连接开关管的发射极并接地；脉冲变压器的二次绕组连接二次整流回路的输入端；第一电阻和第二电阻串联，第一电阻和第二电阻的连接点共同接控制单元的输入端；第一电阻的另一端连接电感及第五电容；第二电阻的另一端接地。A switching power supply device, comprising: a rectifier bridge circuit, a pulse transformer, a switch tube, a secondary rectification circuit, a first resistor, a second resistor, a third resistor, a third capacitor and a control unit. One end of the output end of the rectifier bridge circuit is connected to the primary winding of the pulse transformer, and the other end is connected to the emitter of the switch tube; the collector of the switch tube is connected to the other end of the primary winding of the pulse transformer; the base of the switch tube is connected to the output of the control unit terminal; the third capacitor and the third resistor are connected in series, the other end of the third capacitor is connected to the collector of the switch tube, the other end of the third resistor is connected to the emitter of the switch tube and grounded; the secondary winding of the pulse transformer is connected to the secondary rectification circuit The input terminal of the first resistor and the second resistor are connected in series, and the connection point of the first resistor and the second resistor is connected to the input terminal of the control unit; the other end of the first resistor is connected to the inductor and the fifth capacitor; the other end of the second resistor grounded.
所述整流桥电路包括：第一二极管、第二二极管、第三二极管、第四二极管、第一电容及第二电容。第一二极管的阳极与第三二极管的阴极共同连接电网电源相线L端；第二二极管的阳极和第四二极管的阴极相连并共同接电网电源中性线N端；第一二极管的阴极和第二二极管的阴极相连并共同连接脉冲变压器的一次绕组的一端；第四二极管的阳极和第三二极管的阳极相连并共同连接开关管的发射极；第一电容的两端分别与第一二极管的阴极、第四二极管的阳极相连；第一电容与第二电容并联。The rectifier bridge circuit includes: a first diode, a second diode, a third diode, a fourth diode, a first capacitor and a second capacitor. The anode of the first diode and the cathode of the third diode are commonly connected to the phase line L terminal of the grid power supply; the anode of the second diode is connected to the cathode of the fourth diode and are jointly connected to the N terminal of the neutral line of the grid power supply ; The cathode of the first diode is connected to the cathode of the second diode and is commonly connected to one end of the primary winding of the pulse transformer; the anode of the fourth diode is connected to the anode of the third diode and is commonly connected to the switch tube The emitter; the two ends of the first capacitor are respectively connected with the cathode of the first diode and the anode of the fourth diode; the first capacitor is connected in parallel with the second capacitor.
所述脉冲变压器包括：一次侧绕组L1、铁心T及二次侧绕组L2；一次侧绕组L1一端和第一二极管的阴极相连，一次侧绕组L1另一端与开关管T1的集电极相连；二次侧绕组L2一端与第一磁珠SC1的一端相连，另一端接地。The pulse transformer includes: a primary side winding L1, an iron core T and a secondary side winding L2; one end of the primary side winding L1 is connected to the cathode of the first diode, and the other end of the primary side winding L1 is connected to the collector of the switching tube T1; One end of the secondary side winding L2 is connected to one end of the first magnetic bead SC1, and the other end is grounded.
所述二次整流回路包括：第五二极管、第一磁珠SC1、第六二极管、第二磁珠SC2、第四电容、第四电阻、电感L及第五电容；第四电容和第四电阻串联，该串联支路的两端分别与第一磁珠SC1的一端和第五二极管阳极连接，可抑制浪涌电压；第五二极管阴极和第六二极管的阴极相连并共同连接电感L的一端；第二磁珠SC2的一端和第六二极管的阳极连接，第二磁珠SC2的另一端接地，可抑制第五二极管的反向浪涌电流；第五电容的一端连接电感的另一端；第五电容的另一端接地；第六二极管、电感L和第五电容形成的滤波网络，可减小直流输出中的纹波。The secondary rectification circuit includes: a fifth diode, a first magnetic bead SC1, a sixth diode, a second magnetic bead SC2, a fourth capacitor, a fourth resistor, an inductance L and a fifth capacitor; the fourth capacitor It is connected in series with the fourth resistor, and the two ends of the series branch are respectively connected with one end of the first magnetic bead SC1 and the anode of the fifth diode, which can suppress the surge voltage; the cathode of the fifth diode and the anode of the sixth diode The cathode is connected to one end of the inductor L; one end of the second magnetic bead SC2 is connected to the anode of the sixth diode, and the other end of the second magnetic bead SC2 is grounded, which can suppress the reverse surge current of the fifth diode ; One end of the fifth capacitor is connected to the other end of the inductor; the other end of the fifth capacitor is grounded; the filter network formed by the sixth diode, the inductor L and the fifth capacitor can reduce the ripple in the DC output.
所述第一电阻和第二电阻组成分压电阻。第一电阻R1和第二电阻串联，并与第五电容并联；第二电阻一端与控制单元的输入端连接，另一端接地；通过第一电阻和第二电阻，可实现对直流输出的采样；根据采样的数值，控制单元调节开关管T1的导通和关断的时间比，以控制直流输出的值稳定在设定值，进而形成负反馈。The first resistor and the second resistor form a voltage dividing resistor. The first resistor R1 is connected in series with the second resistor, and connected in parallel with the fifth capacitor; one end of the second resistor is connected to the input end of the control unit, and the other end is grounded; through the first resistor and the second resistor, sampling of the DC output can be realized; According to the sampled value, the control unit adjusts the turn-on and turn-off time ratio of the switch tube T1 to control the value of the DC output to be stable at the set value, thereby forming a negative feedback.
所述第三电容C3和第三电阻R3串联，该串联支路的两端分别与开关管的集电极和开关管的放射极相连，可吸收开关管导通和关断瞬间产生的浪涌电压。The third capacitor C3 is connected in series with the third resistor R3, and the two ends of the series branch are respectively connected to the collector of the switch tube and the emitter of the switch tube, which can absorb the surge voltage generated at the moment of the switch tube being turned on and off .
所述第二电容C2是一个高频电容，用以降低高频阻抗，可以减少高频电流以差模形式所造成的传导骚扰。The second capacitor C2 is a high-frequency capacitor, which is used to reduce high-frequency impedance and reduce conduction disturbance caused by high-frequency current in differential mode.
所述第四电容C4和第四电阻R4串联，可抑制浪涌电压。The fourth capacitor C4 is connected in series with the fourth resistor R4 to suppress the surge voltage.
与现有技术相比，本发明的有益效果是：本发明提供了一种开关电源装置，具有能有效抑制其自身电磁骚扰的特点，可应用于精密的电子仪器或设备。Compared with the prior art, the beneficial effect of the present invention is: the present invention provides a switching power supply device, which has the characteristics of effectively suppressing its own electromagnetic disturbance, and can be applied to precise electronic instruments or equipment.
附图说明Description of drawings
图1是本发明的装置结构示意图。Fig. 1 is a schematic diagram of the device structure of the present invention.
具体实施方式detailed description
本发明的具体实施方式如图1所示。The specific embodiment of the present invention is shown in Fig. 1 .
本实施例一种开关电源装置，包括整流桥电路、脉冲变压器T、开关管T1、二次整流回路、第一电阻R1、第二电阻R2、第三电阻R3、第三电容C3和控制单元。This embodiment is a switching power supply device, including a rectifier bridge circuit, a pulse transformer T, a switch tube T1, a secondary rectification circuit, a first resistor R1, a second resistor R2, a third resistor R3, a third capacitor C3 and a control unit.
本实施例中的整流桥电路的输出端的一端连接脉冲变压器的一次绕组，另一端连接开关管T1的发射极；开关管T1的集电极连接脉冲变压器T的一次绕组的另一端；开关管的基极连接控制单元的输出端；第三电容C3和第三电阻R3串联，第三电容C3的另一端连接开关管T1的集电极，第三电阻R3的另一端连接开关管T1的发射极并接地；第三电容C3和第三电阻R3形成的串联支路的两端分别与开关管的集电极和开关管的放射极相连，可吸收开关管导通和关断瞬间产生的浪涌电压。One end of the output end of the rectifier bridge circuit in this embodiment is connected to the primary winding of the pulse transformer, and the other end is connected to the emitter of the switch tube T1; the collector of the switch tube T1 is connected to the other end of the primary winding of the pulse transformer T; the base of the switch tube The pole is connected to the output end of the control unit; the third capacitor C3 is connected in series with the third resistor R3, the other end of the third capacitor C3 is connected to the collector of the switching tube T1, and the other end of the third resistor R3 is connected to the emitter of the switching tube T1 and grounded ; The two ends of the series branch formed by the third capacitor C3 and the third resistor R3 are respectively connected with the collector of the switch tube and the emitter of the switch tube, which can absorb the surge voltage generated at the moment when the switch tube is turned on and off.
本实施例中的脉冲变压器T的二次绕组L2连接二次整流回路的输入端；第一电阻R1和第二电阻R2串联，第一电阻R1和第二电阻R2的连接点共同接控制单元的输出端；第一电阻R1的另一端连接电感L及第五电容C5；第二电阻R2的另一端接地。The secondary winding L2 of the pulse transformer T in this embodiment is connected to the input terminal of the secondary rectification circuit; the first resistor R1 and the second resistor R2 are connected in series, and the connection point of the first resistor R1 and the second resistor R2 is connected to the control unit. Output end; the other end of the first resistor R1 is connected to the inductor L and the fifth capacitor C5; the other end of the second resistor R2 is grounded.
本实施例中的整流桥电路包括：第一二极管D1、第二二极管D2、第三二极管D3、第四二极管D4、第一电容C1及第二电容C2；第一二极管D1的阳极与第三二极管D3的阴极共同连接电网电源相线L端；第二二极管D2的阳极和第四二极管D4的阴极相连并共同接电网电源中性线N端；第一二极管D1的阴极和第二二极管D2的阴极相连并共同连接脉冲变压器T的一次绕组L1的一端；第四二极管D4的阳极和第三二极管D3的阳极相连并共同连接开关管T1的发射极；第一电容C1的两端分别与第一二极管D1的阴极、第四二极管D4的阳极相连；第一电容C1与第二电容C2并联。第二电容C2是一个高频电容，用以降低高频阻抗，可以减少高频电流以差模形式所造成的传导骚扰。The rectifier bridge circuit in this embodiment includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1 and a second capacitor C2; The anode of the diode D1 and the cathode of the third diode D3 are connected to the phase line L terminal of the grid power supply; the anode of the second diode D2 is connected to the cathode of the fourth diode D4 and are connected to the neutral line of the grid power supply N terminal; the cathode of the first diode D1 is connected to the cathode of the second diode D2 and is commonly connected to one end of the primary winding L1 of the pulse transformer T; the anode of the fourth diode D4 is connected to the anode of the third diode D3 The anodes are connected and commonly connected to the emitter of the switch tube T1; both ends of the first capacitor C1 are respectively connected to the cathode of the first diode D1 and the anode of the fourth diode D4; the first capacitor C1 and the second capacitor C2 are connected in parallel . The second capacitor C2 is a high-frequency capacitor, which is used to reduce high-frequency impedance and reduce conduction disturbance caused by high-frequency current in differential mode.
所述脉冲变压器T包括：一次侧绕组L1、铁心T及二次侧绕组L2。一次侧绕组L1一端和第一二极管D1的阴极相连，一次侧绕组L1另一端与开关管T1的集电极相连；二次侧绕组L2一端与第一磁珠SC1的一端相连，另一端接地。The pulse transformer T includes: a primary winding L1, an iron core T and a secondary winding L2. One end of the primary winding L1 is connected to the cathode of the first diode D1, and the other end of the primary winding L1 is connected to the collector of the switching tube T1; one end of the secondary winding L2 is connected to one end of the first bead SC1, and the other end is grounded .
所述二次整流回路包括：第五二极管D5、第一磁珠SC1、第六二极管D6、第二磁珠SC2、第四电容C4、第四电阻R4、电感L及第五电容C5。第四电容C4和第四电阻R4串联，可抑制浪涌电压；该串联支路的两端分别与第一磁珠SC1的一端和第五二极管D5阳极连接，也可抑制浪涌电压；第五二极管D5阴极和第六二极管D6的阴极相连并共同连接电感L的一端；第二磁珠SC2的一端和第六二极管D6的阳极连接，第二磁珠SC2的另一端接地，可抑制二极管D5的反向浪涌电流；第五电容C5的一端连接电感的另一端；第五电容C5的另一端接地；第六二极管D6、电感L和第五电容C5形成的滤波网络，可减小直流输出中的纹波。The secondary rectification circuit includes: a fifth diode D5, a first magnetic bead SC1, a sixth diode D6, a second magnetic bead SC2, a fourth capacitor C4, a fourth resistor R4, an inductor L and a fifth capacitor C5. The fourth capacitor C4 and the fourth resistor R4 are connected in series, which can suppress the surge voltage; the two ends of the series branch are respectively connected with one end of the first magnetic bead SC1 and the anode of the fifth diode D5, which can also suppress the surge voltage; The cathode of the fifth diode D5 is connected to the cathode of the sixth diode D6 and is connected to one end of the inductor L; one end of the second magnetic bead SC2 is connected to the anode of the sixth diode D6, and the other end of the second magnetic bead SC2 One end is grounded to suppress the reverse surge current of the diode D5; one end of the fifth capacitor C5 is connected to the other end of the inductor; the other end of the fifth capacitor C5 is grounded; the sixth diode D6, the inductor L and the fifth capacitor C5 form The filter network can reduce the ripple in the DC output.
所述第一电阻R1和第二电阻R2组成分压电阻。The first resistor R1 and the second resistor R2 form a voltage dividing resistor.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004837A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
| CN111355366A (en) * | 2018-12-24 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004837A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
| CN111355366A (en) * | 2018-12-24 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
| CN111355366B (en) * | 2018-12-24 | 2021-12-28 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
| US12063025B2 (en) | 2018-12-24 | 2024-08-13 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | System applied in switch tube for conducted EMI suppression and domestic appliance |
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