CN101820219B - Intelligent high-frequency switching mode power supply with reliable output voltage - Google Patents
Intelligent high-frequency switching mode power supply with reliable output voltage Download PDFInfo
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- CN101820219B CN101820219B CN2010101575934A CN201010157593A CN101820219B CN 101820219 B CN101820219 B CN 101820219B CN 2010101575934 A CN2010101575934 A CN 2010101575934A CN 201010157593 A CN201010157593 A CN 201010157593A CN 101820219 B CN101820219 B CN 101820219B
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Abstract
The invention discloses an intelligent high-frequency switching mode power supply with reliable output voltage, comprising a monitor unit, photocouplers, integrating circuits, a difference amplifier, an error amplifier and a power conversion circuit, wherein a PWM signal output by the monitor unit is divided into two paths, one of which is processed by a first photocoupler and a first integrating circuit taking reference voltage as bias voltage at secondary level and then fed to one input end of the difference amplifier, and the other of which is processed by an inverter, then processed by a second photocoupler and a second integrating circuit and finally fed to the other input end of the difference amplifier, an output signal of the difference amplifier is superposed with the reference voltage and then fed to an in-phase input end of the error amplifier, an out-phase input end of the error amplifier is connected with a feedback network, and an output end thereof controls the power conversion circuit. The intelligent high-frequency switching mode power supply can stably and reliably operate when a voltage-adjusting signal fails or the monitor unit stops operating, thereby ensuring the safety of battery pack and power equipment.
Description
Technical field
The present invention relates to a kind of intelligent high frequency switch power supply system of high reliability, particularly wherein regulating circuit part belongs to power technique fields.
Background technology
Intelligent high frequency switch power supply system is made up of monitoring unit, voltage regulation of electric power sources module and power conversion circuit; System is through sending PWM pressure regulation signal to the setting of monitoring unit; Each voltage regulation of electric power sources module becomes monitoring that the input of delivering to power conversion circuit behind the voltage is set PWM pressure regulation conversion of signals, reaches the purpose of Adjustment System output voltage.At present, the voltage regulation of electric power sources module of intelligent high frequency switch power supply system can only be from the initial state step-down, and the initial state of monitoring unit is exported the PWM pressure regulation signal of 100% pulsewidth, obtains the system's output voltage that needs through setting.The voltage regulation of electric power sources module of the intelligent high frequency switch power supply system that also has can only be boosted from initial state, and what the initial state of monitoring unit was exported is the PWM pressure regulation signal of 0 pulsewidth, obtains the system's output voltage that needs through setting.100% pulsewidth and 0 pulsewidth be the highest and minimum output voltage of corresponding power system respectively; When the pressure regulation Signal Fail; The highest or the minimum voltage of power-supply system output; Can cause overshoot or cross battery pack like this and put, influence the useful life of battery pack, also possibly cause the power consumption equipment cisco unity malfunction simultaneously.Also have a kind of system all to be provided with independent CPUs in each voltage regulation of electric power sources inside modules; When monitoring unit just often; The CPU of voltage regulation of electric power sources module is according to the pressure regulation order adjustment output voltage of monitoring unit; When the pressure regulation Signal Fail of monitoring unit or monitoring unit were deactivated, its output voltage of CPU control of voltage regulation of electric power sources module made power-supply system export normal battery pack float charge voltage.Though can obtain voltage regulation result preferably like this, system safety is stably worked, circuit system is complicated, and cost is high.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and a kind of simple in structure, working stability is provided, has the intelligent high-frequency switching mode power supply of reliable output voltage.
The objective of the invention is to realize with following technical proposals:
A kind of intelligent high-frequency switching mode power supply with reliable output voltage; It comprises monitoring unit, photoelectrical coupler, integrating circuit, differential amplifier, error amplifier and power conversion circuit; Said monitoring unit output PWM pressure regulation signal, PWM pressure regulation signal is divided into two-way, and one the tunnel delivers to an input of differential amplifier after first photoelectrical coupler and first integral processing of circuit; Wherein, the output of first photoelectrical coupler is provided with reference voltage; After second photoelectrical coupler and second integral processing of circuit, deliver to another input of differential amplifier after another Lu Xianjing inverter is handled again, wherein, the output of second photoelectrical coupler is provided with reference voltage; Send into the in-phase input end of error amplifier after the output signal of said differential amplifier and the reference voltage stack, the inverting input of error amplifier connects feedback network, output power controlling translation circuit.
Above-mentioned intelligent high-frequency switching mode power supply with reliable output voltage; Said first integral circuit is made up of first operational amplifier, first resistance, first electric capacity; Said first resistance, first electric capacity all are connected between the inverting input and output of first operational amplifier; The inverting input of said first operational amplifier connects the output signal of first photoelectrical coupler, in-phase input end ground connection, an input of input termination differential amplifier; Said second integral circuit is made up of second operational amplifier, second resistance, second electric capacity; Said second resistance, second electric capacity all are connected between the inverting input and output of second operational amplifier; The inverting input of said second operational amplifier connects the output signal of second photoelectrical coupler; In-phase input end ground connection, another input of input termination differential amplifier.
Above-mentioned intelligent high-frequency switching mode power supply with reliable output voltage; Said differential amplifier is made up of the 3rd operational amplifier, resistance, electric capacity; The inverting input of said the 3rd operational amplifier connects the output signal of first operational amplifier; In-phase input end connects the output signal of second operational amplifier, and the output signal is sent into the input of error amplifier; The 3rd resistance, the 4th resistance and the 3rd electric capacity constitute the feedback circuit of the 3rd operational amplifier, and it is connected between the inverting input and output of the 3rd operational amplifier.
The present invention adopts inverter, photoelectrical coupler and integrating circuit to constitute two and regulates pressure regulation unit in the opposite direction, and they will become monitoring that voltage is set with differential amplifier from the PWM pressure regulation conversion of signals of monitoring unit; The initial value that monitoring is provided with voltage both can raise; Also can reduce, initial value that therefore can power-supply system is set to load voltage value, and the initial state output of monitoring unit is such as 50% pulsewidth; When the pressure regulation Signal Fail; Power-supply system is the float charge voltage of exportable battery pack, so just can not cause battery pack overcharge or overdischarge, and can guarantee the power consumption equipment operate as normal.
The present invention is simple in structure, with low cost, can be when the pressure regulation Signal Fail or monitoring unit when deactivating, and stable and work reliably, guaranteed the safety of battery pack and power consumption equipment.
Description of drawings
Fig. 1 is an electric theory diagram of the present invention;
Fig. 2 is an electrical schematic diagram of the present invention.
Each label is among the figure: CTRL, monitoring unit; U1, first photoelectrical coupler; U2, second photoelectrical coupler; U3, inverter; F1, first operational amplifier; F2, second operational amplifier; F3, the 3rd operational amplifier; F4, error amplifier; PWR, power conversion circuit; C1, C2, C3, first～the 3rd electric capacity; R1～R19, first～the 19 resistance.
Embodiment
Referring to Fig. 2; Operation principle of the present invention is: monitoring unit (CTRL) sends pressure regulation signal PWM+; This signal obtains PWM-after inverter (U3) is reverse; PWM+ and PWM-isolate transmission through first photoelectrical coupler (U1), second photoelectrical coupler (U2) respectively; The reference voltage V REF of the secondary adding high-frequency switching power supply module of two photoelectrical couplers, obtaining amplitude is the pulsewidth voltage signal of reference voltage, obtains voltage signal U+ and U-behind first integral circuit that two pulsewidth voltage signals constitute via first operational amplifier (F1) respectively and the second integral circuit integral filtering that is made up of second operational amplifier (F2); U+ and U-send the differential amplifier that is made up of the 3rd operational amplifier (F3) relatively back output voltage signal Ue simultaneously; Send into the in-phase input end of error amplifier (F4) after Ue and the reference voltage V REF stack, error amplifier (F4) also is an operational amplifier, and its reverse input end connects the output voltage feedback network of this power module; Feedback network is formed by the 5th (R5), the 6th resistance (R6); They are connected into the output voltage VO UT that connects this power module behind the bleeder circuit, and the feedback signal of serial connection point output connects the reverse input end of error amplifier (F4), and the Power Conversion of the output control power module of error amplifier is partly adjusted output voltage.The initial state of PWM+ is 50% pulse width signal, and PWM-is 50% the pulse width signal complementary with the PWM+ phase place, this moment U+=U-, so Ue is a fixing biasing voltage signal, power module output rated voltage, the i.e. float charge voltage of battery pack.As PWM+ during greater than 50% pulsewidth, U+ is greater than U-, and Ue voltage rises, and the in-phase input end voltage of error amplifier rises, and the output voltage of power module raises; As PWM+ during less than 50% pulsewidth, U+ is less than U-, and Ue voltage descends, and the in-phase input end voltage of error amplifier descends, and the output voltage of power module reduces; When monitoring unit pressure regulation Signal Fail or when deactivating, the reference voltage of power module is that PWM+ and PWM-provide biasing, U+=U-, so Ue is a fixing biasing voltage signal, and the float charge voltage of power module output battery pack.
Power conversion circuit PWR is the power topological circuit of high frequency switch power, can adopt soft switch, and hard switching wherein, has multiple circuit in the soft switch, and like phase-shifting full-bridge, half-bridge resonance etc., hard switching has full-bridge, and half-bridge etc. all can adopt.
Claims (3)
1. intelligent high-frequency switching mode power supply with reliable output voltage; It is characterized in that it comprises monitoring unit, photoelectrical coupler, integrating circuit, differential amplifier, error amplifier (F4) and power conversion circuit, said monitoring unit output PWM+ pressure regulation signal; PWM+ pressure regulation signal is divided into two-way; One the tunnel delivers to an input of differential amplifier after first photoelectrical coupler (U1) and first integral processing of circuit, wherein, the output of first photoelectrical coupler is provided with reference voltage; Obtain PWM-after another Lu Xianjing inverter (U3) is handled, after second photoelectrical coupler (U2) and second integral processing of circuit, deliver to another input of differential amplifier again, wherein, the output of second photoelectrical coupler is provided with said reference voltage; Send into the in-phase input end of error amplifier (F4) after the output signal of said differential amplifier and the stack of said reference voltage, the inverting input of error amplifier (F4) connects feedback network, the output power controlling translation circuit (PWR) of error amplifier (F4);
The initial state of said PWM+ pressure regulation signal is 50% pulse width signal.
2. according to the said intelligent high-frequency switching mode power supply of claim 1 with reliable output voltage; It is characterized in that; Said first integral circuit is made up of first operational amplifier (F1), first resistance (R1) and first electric capacity (C1); Said first resistance (R1) and first electric capacity (C1) all are connected between the inverting input and output of first operational amplifier (F1), and the inverting input of said first operational amplifier (F1) connects the output signal of first photoelectrical coupler (U1), in-phase input end ground connection; Said second integral circuit is made up of second operational amplifier (F2), second resistance (R2) and second electric capacity (C2); Said second resistance (R2) and second electric capacity (C2) all are connected between the inverting input and output of second operational amplifier (F2); The inverting input of said second operational amplifier (F2) connects the output signal of second photoelectrical coupler (U2), in-phase input end ground connection; The output of said first operational amplifier (F1) and second operational amplifier (F2) connects two inputs of differential amplifier respectively.
3. according to claim 1 or 2 said intelligent high-frequency switching mode power supplies with reliable output voltage; It is characterized in that; Said differential amplifier is made up of with the 3rd electric capacity (C3) the 3rd operational amplifier (F3), the 3rd resistance (R3), the 4th resistance (R4); The inverting input of said the 3rd operational amplifier (F3) connects the output signal of first operational amplifier (F1); In-phase input end connects the output signal of second operational amplifier (F2), and the output signal of the 3rd operational amplifier is delivered to the input of error amplifier (F4); The 3rd resistance (R3), the 4th resistance (R4) and the 3rd electric capacity (C3) constitute the feedback circuit of the 3rd operational amplifier, and it is connected between the inverting input and output of the 3rd operational amplifier (F3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101575934A CN101820219B (en) | 2010-04-28 | 2010-04-28 | Intelligent high-frequency switching mode power supply with reliable output voltage |
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| CN2010101575934A CN101820219B (en) | 2010-04-28 | 2010-04-28 | Intelligent high-frequency switching mode power supply with reliable output voltage |
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| CN101820219B true CN101820219B (en) | 2012-09-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103595398B (en) * | 2013-11-01 | 2016-09-07 | 天津大学 | Analog quantity Phototube Coupling change-over circuit based on time ratio PWM |
| CN107579669A (en) * | 2017-09-18 | 2018-01-12 | 合肥华耀电子工业有限公司 | A kind of AC/DC output voltages regulated power supply |
| CN108429584B (en) * | 2018-03-12 | 2020-06-16 | 湖南大学 | Analog signal transmission device based on phase-shift PWM modulation |
| CN108494376B (en) * | 2018-03-27 | 2019-07-26 | 商丘职业技术学院 | Blending teaching and learning model control system based on computer network |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457793Y (en) * | 2000-11-03 | 2001-10-31 | 深圳市中兴通讯股份有限公司 | Controller of phase shift resonant switch conversion circuit |
| CN101551408A (en) * | 2008-03-31 | 2009-10-07 | 上海电气自动化设计研究所有限公司 | Arbitrary waveform generation device of device ageing screening lathe |
| CN101567658A (en) * | 2009-06-05 | 2009-10-28 | 中国兵器工业第二○六研究所 | Rotating transformer exciting circuit based on sinusoidal pulse width modulation (SPWM) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI220083B (en) * | 2003-08-07 | 2004-08-01 | Analog Integrations Corp | Control circuit of pulse width modulation DC-to-DC converter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457793Y (en) * | 2000-11-03 | 2001-10-31 | 深圳市中兴通讯股份有限公司 | Controller of phase shift resonant switch conversion circuit |
| CN101551408A (en) * | 2008-03-31 | 2009-10-07 | 上海电气自动化设计研究所有限公司 | Arbitrary waveform generation device of device ageing screening lathe |
| CN101567658A (en) * | 2009-06-05 | 2009-10-28 | 中国兵器工业第二○六研究所 | Rotating transformer exciting circuit based on sinusoidal pulse width modulation (SPWM) |
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Address after: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee after: Shijiazhuang Guoyao Eletronic Co.,Ltd. Patentee after: SHENZHEN GYE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee before: Shijiazhuang Guoyao Eletronic Co.,Ltd. Patentee before: Shenzhen Guoyao Electronic Technology Co.,Ltd. |
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Effective date of registration: 20151229 Address after: Longgang District of Shenzhen City, Guangdong province 518129 Buji Bantian Jihua Road, Liuzhou Choi industrial city 10 Building 6 layer Patentee after: SHENZHEN GYE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee before: Shijiazhuang Guoyao Eletronic Co.,Ltd. Patentee before: SHENZHEN GYE ELECTRONIC TECHNOLOGY Co.,Ltd. |