CN104410051A - DC booster module power source output high voltage overvoltage protector - Google Patents
DC booster module power source output high voltage overvoltage protector Download PDFInfo
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- CN104410051A CN104410051A CN201410605497.XA CN201410605497A CN104410051A CN 104410051 A CN104410051 A CN 104410051A CN 201410605497 A CN201410605497 A CN 201410605497A CN 104410051 A CN104410051 A CN 104410051A
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- 230000001012 protector Effects 0.000 title abstract 2
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- 239000003990 capacitor Substances 0.000 claims description 21
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- 238000000034 method Methods 0.000 abstract description 3
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- 238000005070 sampling Methods 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 2
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- 238000004146 energy storage Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
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Abstract
The invention discloses a DC booster module power source output high voltage overvoltage protector. A mode combining an isolation transformation module, an optical coupler isolation module and an isolation amplification module is employed, the optical coupler isolation module is used for working to be taken as a protection start threshold when an output voltage is an overvoltage and isolating an initial point of a driving signal, a primary signal is outputted by a secondary triode of the optical coupler isolation module to the isolation amplification module, the isolation transformation module is used for providing a work voltage for the driving signal after isolation, the isolation transformation module and the isolation amplification module commonly form an isolation loop to isolate a PWM square wave driving loop from an overvoltage sampling feedback signal, so pre-stage PWM driving signals are not influenced by later-stage high voltages when DC high voltage overcurrent is outputted, the DC high voltage is directly taken as the overvoltage protection function, the high voltage overvoltage protection method is expanded, the booster circuit function is made to be more complete, and a problem of having no self overvoltage control port is solved.
Description
Technical field
The present invention relates to high voltage overvoltage protection field, more specifically, relate to a kind of DC boosting modular power source and export high pressure over-pressure safety device.
Background technology
In DC power supply application; overvoltage protection is done for output DC high voltage very difficult; particularly output dc voltage is up to hundreds of volt, verifies whether the high pressure that such DC power supplier exports can realize overvoltage protection and damage other key elements after preventing high direct voltage overvoltage being necessary.And it is existing; in BOOST booster circuit topology; tens volts are raised to a few hectovolt high direct voltage by low input direct voltage; PWM square wave driving chip great majority do not carry output voltage overvoltage protection port; actual conventional DC power supply is much only equipped with the DC power supply exporting and only have tens volts simultaneously; according to DC over-voltage test specification, when exporting High Level DC Voltage, its overvoltage test point is generally defined in 1.5 times of its rated value.In addition, BOOST booster circuit mostly is non-isolation type circuit, directly does output voltage overvoltage in output voltage overvoltage protection or circuit use, the driving chip in circuit will be easy to burn out, whole circuit safety reliability is reduced.
The wayward overvoltage of high direct voltage, particularly when abnormal or open circuit appear in DC Module power output end, exports high direct voltage and can be in dangerous situation, be easy to because of high direct voltage overvoltage, control chip be burnt out.And the method for taking precautions against high direct voltage is less, for non-isolation DC-DC direct current boosting power module, occur that output voltage overvoltage is fatal.
Summary of the invention
In order to overcome the existing deficiency to existing during DC boosting modular power source output voltage overvoltage protection; the present invention proposes a kind of DC boosting modular power source and exports high pressure over-pressure safety device; this protective device can quick closedown because of the DC Module power supply of high pressure overvoltage; reduce the probability that high direct voltage modular power source lost efficacy, reach the object to output voltage overvoltage protection.
To achieve these goals, technical scheme of the present invention is:
A kind of DC boosting modular power source exports high pressure over-pressure safety device, for the high pressure overvoltage protection exported DC boosting modular power source, comprise power circuit, booster circuit, signal drive circuit, high voltage direct current exports circuit and high voltage direct current output overvoltage protection circuit, described signal drive circuit generates PWM square wave driving signal and drives booster circuit, the output termination high-voltage dc transmission of booster circuit goes out the input of circuit, the output termination high-voltage dc transmission of high voltage direct current output circuit goes out the input of overvoltage crowbar, the output termination power circuit Enable Pin of high voltage direct current output overvoltage protection circuit, described power circuit is powered to the Isolation Amplifier Module in signal drive circuit and high voltage direct current output overvoltage protection circuit,
Described power circuit comprises power module and isolation voltage changing module, and the voltage that power module exports is isolated into first via Vbias voltage and the second road Vout2 voltage through isolation voltage changing module; Wherein first via Vbias voltage feeds to signal drive circuit, and the second road Vout2 voltage feeds to the Isolation Amplifier Module in high voltage direct current output overvoltage protection circuit;
Described high voltage direct current output overvoltage protection circuit comprises light-coupled isolation module and Isolation Amplifier Module, and the light-emitting diode negative pole of wherein light-coupled isolation module primary side connects reference voltage, and light-emitting diode positive pole meets voltage Vout by resistance; The collector electrode of the triode of secondary side connects the second road Vout2 positive polarity, the emitter of triode is by connecing an input of Isolation Amplifier Module after electric resistance partial pressure, another input of Isolation Amplifier Module connects the second road Vout2 voltage negative pole by resistance, the Enable Pin of the output termination power module of Isolation Amplifier Module.
The course of work of this protective device is: this over-pressure safety device only could action when overvoltage appears in high direct voltage, the two-way voltage that power circuit exports, when Vout2 voltage is greater than reference voltage, light-coupled isolation module is started working, light-coupled isolation inside modules triode ON, On current flows through the resistance that transistor emitter therewith connects, these resistance two ends produce the input being added in Isolation Amplifier Module, the high level of several volts is produced after isolation is amplified, high level is after upset, be added to the Enable Pin of power module, drag down Enable Pin, power module closes the output voltage of power supply because its Enable Pin is low level, thus whole circuit is quit work, so just reach the object exporting high direct voltage overvoltage protection.
The present invention adopts isolation voltage changing module, the mode that light-coupled isolation module and Isolation Amplifier Module combine, light-coupled isolation module is used for working as the thresholding of protection beginning when output voltage overvoltage, the initial point of isolation drive signal, primary signal is exported to Isolation Amplifier Module by the secondary triode of light-coupled isolation module, and isolate voltage changing module be used for isolation after drive singal operating voltage is provided, form isolated loop together with Isolation Amplifier Module simultaneously, PWM square wave drive circuit and overvoltage sampled feedback signal are kept apart, the prime PWM drive singal when exporting high direct voltage overcurrent can be made so not to be subject to the impact of rear class high pressure, achieve the function that high direct voltage directly does overvoltage protection, expand the method for this high pressure overvoltage protection, make booster circuit function more complete, also the problem self not having overvoltage control port is solved.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
High direct voltage because of voltage high, dangerous high, difficulty of test is high, and high direct voltage overvoltage, the problem caused is just more serious, the present invention disclose a kind of can quick closedown because of the power supply of the DC power supplier of high pressure overvoltage, reduce the probability that high direct voltage modular power source lost efficacy, indirectly reduce the workload of maintenance personal.
In economic benefit, often reduce some failure rates, just can save operating cost, improve the reliability of product.And the present invention is for there being the effect of expanding its electric property without the power supply chip carrying over-voltage protecting function; particularly BOOST boosting non-isolation type direct-current power module; after output voltage exceedes direct current 60V; increase this high pressure over-pressure safety device; seem particularly important for the overall performance improving DC power supplier, this programme well solves these difficult problems.
Accompanying drawing explanation
Fig. 1 is the structural representation that DC boosting modular power source of the present invention exports high pressure over-pressure safety device.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Embodiment 1
Power supply control chip is carried to the electrical characteristic of output overvoltage; high direct voltage overvoltage protection can be applied this characteristic and solve problem; and a lot of boosting rectifier control does not have output over-voltage protection interface; incomplete for power source integral performance like this; if can outer increasing and output voltage over-voltage protecting function; so just can expand the function of most power supply control chip; compensate for the deficiency of most power supply control chip, this is very favorable beyond doubt for the performance integrity of deisgn product.
As Fig. 1, 2, a kind of DC boosting modular power source exports high pressure over-pressure safety device, for the high pressure overvoltage protection exported DC boosting modular power source, comprise power circuit 1, booster circuit 2, signal drive circuit 3, high voltage direct current exports circuit 4 and high voltage direct current output overvoltage protection circuit 5, described signal drive circuit 3 generates PWM square wave driving signal and drives booster circuit 2, the output termination high-voltage dc transmission of booster circuit 2 goes out the input of circuit 4, the output termination high-voltage dc transmission of high voltage direct current output circuit 4 goes out the input of overvoltage crowbar 5, output termination power circuit 1 Enable Pin of high voltage direct current output overvoltage protection circuit 5, described power circuit 1 is powered to the Isolation Amplifier Module 6 in signal drive circuit 3 and high voltage direct current output overvoltage protection circuit 5,
Described power circuit comprises power module and isolation voltage changing module, and the voltage that power module exports is isolated into first via Vbias voltage and the second road Vout2 voltage through isolation voltage changing module; Wherein first via Vbias voltage feeds to signal drive circuit, and the second road Vout2 voltage feeds to the Isolation Amplifier Module in high voltage direct current output overvoltage protection circuit;
Described high voltage direct current output overvoltage protection circuit comprises light-coupled isolation module and Isolation Amplifier Module, and the light-emitting diode negative pole of wherein light-coupled isolation module primary side connects reference voltage, and light-emitting diode positive pole meets voltage Vout by resistance; The collector electrode of the triode of secondary side connects the second road Vout2 positive polarity, the emitter of triode is by connecing an input of Isolation Amplifier Module after electric resistance partial pressure, another input of Isolation Amplifier Module connects the second road Vout2 voltage negative pole by resistance, the Enable Pin of the output termination power module of Isolation Amplifier Module.
Described power module also comprises resistance R865, electric capacity C848 and triode Q15, the output of Isolation Amplifier Module passes through one end of resistance R865, the resistance R865 other end is by electric capacity C848 ground connection DGND, the base stage of another termination triode of resistance R865 Q15, the collector electrode of the grounded emitter DGND of triode Q15, triode Q15 connects the Enable Pin of power module.
Described power module also comprises and is connected in series resistance R738, R737 and the electrochemical capacitor EC40 be connected in parallel, electric capacity C852, C849; Elementary resistance R738, R737 ground connection DGND by being connected in series of isolation voltage changing module, the elementary positive pole also meeting electrochemical capacitor EC40 of isolation voltage changing module, the just very Vbias voltage of the minus earth DGND of electrochemical capacitor EC40, electrochemical capacitor EC40.
Described power module also comprises diode D42, D43, inductance L 24, electrochemical capacitor EC44, electric capacity C96; The secondary two ends of isolation voltage changing module connect the positive pole of diode D42, D43 respectively, the negative pole of diode D42, D43 connects, the negative pole of diode D42 also connects the positive pole of electrochemical capacitor EC44 by inductance L 24, the negative pole of electrochemical capacitor EC44 connects the positive pole of diode D43, and electric capacity C96 is in parallel with electrochemical capacitor EC44; The just very Vout2 positive polarity of electrochemical capacitor EC44, the negative pole of electrochemical capacitor EC44 is Vout2 voltage negative pole.
U53 is the core that whole power module is powered, two-way pio chip supply power voltage can be produced, one road Vbias is used for PWM square wave driving signal chip power supply, another road output voltage Vout2 powers to the inner triode of light-coupled isolation module U75 and isolation operational amplifier, wherein resistance R738, R737 forms the Vbias voltage that voltage divider obtains needing, and electric capacity EC40, C852, C849 are Vbias output capacitances, are used for energy storage, consider noise, voltage stabilizing.And diode D42, D43 are the rectification fly-wheel diodes generating Vout2, inductance L 24, electrochemical capacitor EC44, electric capacity C96 are the energy storage of output voltage Vout2 current stabilization.
EC38, C77, C79, L21, MOS33, MOS34, MOS36, MOS37 are the parts of the booster circuit of direct current boosting power module, constitute BOOST booster circuit loop by TG2, BG2, SW2.
U65, U75, U76B are the main body IC of high direct voltage overvoltage crowbar, U76B is Isolation Amplifier Module.When high direct voltage exports normal; the overvoltage crowbar be made up of U76B, U65, U75 does not work; when high direct voltage output exceedes set point; now the voltage at the reference voltage place of U65 is greater than 2.5V; high direct voltage overvoltage protection starts action, and trigger U53 and quit work, power supply does not have output voltage; then whole DC power supplier quits work, and serves the effect of output voltage overvoltage protection.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection range that all should be included in the claims in the present invention.
Claims (4)
1. a DC boosting modular power source exports high pressure over-pressure safety device, for the high pressure overvoltage protection exported DC boosting modular power source, it is characterized in that, comprise power circuit, booster circuit, signal drive circuit, high voltage direct current exports circuit and high voltage direct current output overvoltage protection circuit, described signal drive circuit generates PWM square wave driving signal and drives booster circuit, the output termination high-voltage dc transmission of booster circuit goes out the input of circuit, the output termination high-voltage dc transmission of high voltage direct current output circuit goes out the input of overvoltage crowbar, the output termination power circuit Enable Pin of high voltage direct current output overvoltage protection circuit, described power circuit is powered to the Isolation Amplifier Module in signal drive circuit and high voltage direct current output overvoltage protection circuit,
Described power circuit comprises power module and isolation voltage changing module, and the voltage that power module exports produces first via Vbias voltage and the second road Vout2 voltage through the isolation of isolation voltage changing module; Wherein first via Vbias voltage feeds to signal drive circuit, and the second road Vout2 voltage feeds to the Isolation Amplifier Module in high voltage direct current output overvoltage protection circuit;
Described high voltage direct current output overvoltage protection circuit comprises light-coupled isolation module and Isolation Amplifier Module, and the light-emitting diode negative pole of wherein light-coupled isolation module primary side connects reference voltage, and light-emitting diode positive pole meets voltage Vout by resistance; The collector electrode of the triode of secondary side connects the second road Vout2 positive polarity, the emitter of triode is by connecing an input of Isolation Amplifier Module after electric resistance partial pressure, another input of Isolation Amplifier Module connects the second road Vout2 voltage negative pole by resistance, the Enable Pin of the output termination power module of Isolation Amplifier Module.
2. DC boosting modular power source according to claim 1 exports high pressure over-pressure safety device; it is characterized in that; described power module also comprises resistance R865, electric capacity C848 and triode Q15; the output of Isolation Amplifier Module passes through one end of resistance R865; the resistance R865 other end is by electric capacity C848 ground connection DGND; the base stage of another termination triode of resistance R865 Q15, the collector electrode of the grounded emitter DGND of triode Q15, triode Q15 connects the Enable Pin of power module.
3. DC boosting modular power source according to claim 1 and 2 exports high pressure over-pressure safety device, it is characterized in that, described power module also comprises and is connected in series resistance R738, R737 and the electrochemical capacitor EC40 be connected in parallel, electric capacity C852, C849; Elementary resistance R738, R737 ground connection DGND by being connected in series of isolation voltage changing module, the elementary positive pole also meeting electrochemical capacitor EC40 of isolation voltage changing module, the just very Vbias voltage of the minus earth DGND of electrochemical capacitor EC40, electrochemical capacitor EC40.
4. DC boosting modular power source according to claim 3 exports high pressure over-pressure safety device, and it is characterized in that, described power module also comprises diode D42, D43, inductance L 24, electrochemical capacitor EC44, electric capacity C96; The secondary two ends of isolation voltage changing module connect the positive pole of diode D42, D43 respectively, the negative pole of diode D42, D43 connects, the negative pole of diode D42 also connects the positive pole of electrochemical capacitor EC44 by inductance L 24, the negative pole of electrochemical capacitor EC44 connects the positive pole of diode D43, and electric capacity C96 is in parallel with electrochemical capacitor EC44; The just very Vout2 positive polarity of electrochemical capacitor EC44, the negative pole of electrochemical capacitor EC44 is Vout2 voltage negative pole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410605497.XA CN104410051B (en) | 2014-10-30 | 2014-10-30 | A kind of DC boosting modular power source exports high pressure over-pressure safety device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410605497.XA CN104410051B (en) | 2014-10-30 | 2014-10-30 | A kind of DC boosting modular power source exports high pressure over-pressure safety device |
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| CN104410051A true CN104410051A (en) | 2015-03-11 |
| CN104410051B CN104410051B (en) | 2017-10-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318813A (en) * | 2018-04-16 | 2018-07-24 | 国家电网公司 | A kind of direct current calibration equipment suitable for rotor over-voltage protection device |
| CN109038483A (en) * | 2018-10-31 | 2018-12-18 | 奥克斯空调股份有限公司 | Overvoltage crowbar |
| CN112235381A (en) * | 2020-10-06 | 2021-01-15 | 青岛运鸿水利水电工程有限公司 | Hydraulic engineering power supply unit based on thing networking |
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| CN1595781A (en) * | 2004-06-30 | 2005-03-16 | 董彦明 | A circuit for realizing switch changeover with zero-voltage switch power |
| CN201937474U (en) * | 2011-01-26 | 2011-08-17 | 深圳茂硕电源科技股份有限公司 | Power supply adopting simple and practical output overvoltage protection circuit |
| CN102487246A (en) * | 2010-12-01 | 2012-06-06 | 比亚迪股份有限公司 | Switching power supply, control method of switching power supply and PWM (pulse width modulation) control chip |
| CN103391013A (en) * | 2013-06-24 | 2013-11-13 | 北京电子工程总体研究所 | Missile test switch power supply with fault memorizing function |
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2014
- 2014-10-30 CN CN201410605497.XA patent/CN104410051B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595781A (en) * | 2004-06-30 | 2005-03-16 | 董彦明 | A circuit for realizing switch changeover with zero-voltage switch power |
| CN102487246A (en) * | 2010-12-01 | 2012-06-06 | 比亚迪股份有限公司 | Switching power supply, control method of switching power supply and PWM (pulse width modulation) control chip |
| CN201937474U (en) * | 2011-01-26 | 2011-08-17 | 深圳茂硕电源科技股份有限公司 | Power supply adopting simple and practical output overvoltage protection circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318813A (en) * | 2018-04-16 | 2018-07-24 | 国家电网公司 | A kind of direct current calibration equipment suitable for rotor over-voltage protection device |
| CN108318813B (en) * | 2018-04-16 | 2020-11-27 | 国家电网公司 | Direct current calibration equipment suitable for rotor overvoltage protection device |
| CN109038483A (en) * | 2018-10-31 | 2018-12-18 | 奥克斯空调股份有限公司 | Overvoltage crowbar |
| CN112235381A (en) * | 2020-10-06 | 2021-01-15 | 青岛运鸿水利水电工程有限公司 | Hydraulic engineering power supply unit based on thing networking |
| CN112235381B (en) * | 2020-10-06 | 2021-09-21 | 宋斌 | Hydraulic engineering power supply unit based on thing networking |
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| CN104410051B (en) | 2017-10-10 |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: VTRON GROUP Co.,Ltd. Address before: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee before: VTRON TECHNOLOGIES Ltd. |
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