CN108539969B - Impact-resistant protection circuit used on driving power supply - Google Patents
Impact-resistant protection circuit used on driving power supply Download PDFInfo
- Publication number
- CN108539969B CN108539969B CN201810383033.7A CN201810383033A CN108539969B CN 108539969 B CN108539969 B CN 108539969B CN 201810383033 A CN201810383033 A CN 201810383033A CN 108539969 B CN108539969 B CN 108539969B
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- resistor
- power supply
- capacitor
- driving power
- circuit
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 34
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
Abstract
The invention provides an impact-resistant protection loop used on a driving power supply, which comprises an EMI filtering loop, a rectifier bridge BD1, a surge absorption anti-interference blanking loop and a driving power supply circuit, wherein the input end of the EMI filtering loop is connected with a commercial power, the output end of the EMI filtering loop is connected with the alternating current input end of the rectifier bridge BD1, the direct current output end of the rectifier bridge BD1 is connected with the input end of the surge absorption anti-interference blanking loop, and the output end of the surge absorption anti-interference blanking loop is connected with the LED driving power supply circuit. The beneficial effects of the invention are as follows: the anti-interference and impact capacity of the driving power supply are improved, so that an electric appliance needing the driving power supply can normally work under the condition of severe input conditions, and the reliability of products is improved.
Description
Technical Field
The present invention relates to a driving power supply, and more particularly, to an impact protection circuit for a driving power supply.
Background
The traditional driving power supply has lower anti-interference and impact capacities, so that an electric appliance (such as an LED lamp) needing the driving power supply cannot work normally under the condition of severe input conditions, and the short service life of the electric appliance (such as the LED lamp or the bulb) has high failure occurrence rate.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an impact-resistant protection circuit used on a driving power supply.
The invention provides an impact-resistant protection loop used on a driving power supply, which comprises an EMI filtering loop, a rectifier bridge BD1, a surge absorption anti-interference blanking loop and a driving power supply circuit, wherein the input end of the EMI filtering loop is connected with a commercial power, the output end of the EMI filtering loop is connected with the alternating current input end of the rectifier bridge BD1, the direct current output end of the rectifier bridge BD1 is connected with the input end of the surge absorption anti-interference blanking loop, and the output end of the surge absorption anti-interference blanking loop is connected with the LED driving power supply circuit.
As a further improvement of the invention, the driving power supply circuit comprises a PWM signal generator, a DC/DC converter and an output rectifying and filtering circuit, wherein the output end of the surge absorption anti-interference blanking circuit is respectively connected with the VCC input pin of the PWM signal generator and the input end of the DC/DC converter, the PWM signal generator is connected with the DC/DC converter, and the output end of the DC/DC converter is connected with the input end of the output rectifying and filtering circuit.
As a further improvement of the invention, the driving power supply circuit is an LED driving power supply circuit, and the output end of the output rectifying and filtering circuit is connected with an LED bulb illuminant.
As a further improvement of the invention, the surge absorption anti-interference blanking loop comprises an inductor L1, a diode D7, a resistor R32, a resistor R36, a capacitor CE4 and a capacitor C10, wherein one end of the inductor L1 is connected with the direct current output end of the rectifier bridge BD1, the other end of the inductor L1 is respectively connected with the anode of the diode D7, the resistor R32, the resistor R36 and the capacitor C10, the diode D7, the resistor R32 and the resistor R36 are connected in parallel, the resistor R36 and the capacitor CE4 are connected in series, the capacitor C10 is connected in parallel with the resistor R36 and the capacitor CE4, and the cathode of the diode D7 is connected with the VCC input pin of the PWM signal generator.
As a further improvement of the present invention, the positive electrode of the capacitor CE4 is connected to the resistor R36, and the negative electrode of the capacitor CE4 is grounded.
As a further improvement of the invention, a resistor R33, a resistor R8, a resistor R9 and a resistor R10 are connected in series between the cathode of the diode D7 and the VCC input pin of the PWM signal generator.
The beneficial effects of the invention are as follows: through the scheme, the circuit utilizes the principles of leading inductance voltage and leading capacitance current, and the surge absorption anti-interference blanking circuit is arranged behind the rectifier bridge BD1, so that the high-voltage pulse signals mixed in the input are absorbed and eliminated through the surge absorption anti-interference blanking circuit, the anti-interference and impact capacity of a driving power supply is improved, an electric appliance needing the driving power supply can normally work under the condition of severe input conditions, and the reliability of products is improved.
Drawings
Fig. 1 is a schematic block diagram of an impact protection circuit for use with a drive power supply according to the present invention.
Fig. 2 is a circuit diagram of a surge absorption anti-tamper blanking circuit of the present invention using an anti-tamper protection circuit on a drive power supply.
Fig. 3 is a circuit diagram of an impact protection circuit for use on a drive power supply according to the present invention.
Detailed Description
The invention is further described with reference to the following description of the drawings and detailed description.
As shown in fig. 1 to 3, an anti-impact protection circuit used on a driving power supply includes an EMI filter circuit 101, a rectifier bridge BD1, a surge absorption anti-interference blanking circuit 102 and a driving power supply circuit, where the LED driving power supply circuit is taken as an example for illustration, the input end of the EMI filter circuit 101 is connected to a mains supply, the output end of the EMI filter circuit 101 is connected to an ac input end of the rectifier bridge BD1, a dc output end of the rectifier bridge BD1 is connected to an input end of the surge absorption anti-interference blanking circuit 101, and the output end of the surge absorption anti-interference blanking circuit 101 is connected to the LED driving power supply circuit.
As shown in fig. 1 to 3, the LED driving power supply circuit includes a PWM signal generator 103, a DC/DC converter 104, and an output rectifying and filtering circuit 105, the output end of the surge absorption anti-interference blanking circuit 102 is connected to the VCC input pin of the PWM signal generator 103 and the input end of the DC/DC converter 104, the PWM signal generator 103 is connected to the DC/DC converter 104, and the output end of the DC/DC converter 104 is connected to the input end of the output rectifying and filtering circuit 105.
As shown in fig. 1 to 3, an output end of the output rectifying and filtering circuit 105 is connected with an LED bulb illuminant 106.
As shown in fig. 1 to 3, the surge absorption anti-interference blanking circuit 102 includes an inductor L1, a diode D7, a resistor R32, a resistor R36, a capacitor CE4, and a capacitor C10, where one end of the inductor L1 is connected to the dc output end of the rectifier bridge BD1, the other end of the inductor L1 is connected to the anode of the diode D7, the resistor R32, the resistor R36, and the capacitor C10, the diode D7, the resistor R32, and the resistor R36 are connected in parallel, the resistor R36 and the capacitor CE4 are connected in series, the capacitor C10 is connected in parallel with the resistor R36 and the capacitor CE4, and the cathode of the diode D7 is connected to the VCC input pin of the PWM signal generator.
As shown in fig. 1 to 3, the positive electrode of the capacitor CE4 is connected to the resistor R36, and the negative electrode of the capacitor CE4 is grounded.
As shown in fig. 1 to 3, a resistor R33, a resistor R8, a resistor R9, and a resistor R10 are connected in series between the cathode of the diode D7 and the VCC input pin of the PWM signal generator.
The working principle of the impact-resistant protection circuit used on the driving power supply provided by the invention is as follows:
when standard commercial power or input voltage waveform distorted by the output of an HID ballast and high-pulse interference signals added on the fundamental frequency of 50-200Hz voltage are formed into a primary EMI filtering loop 101 through a fuse F1, a fuse F2, a bidirectional voltage stabilizing diode MOV1, an inductor LF1, a resistor R2, a resistor R3, a capacitor CX1, an inductor LF2 and a bidirectional voltage stabilizing diode MOV2 at the input end, the input voltage is rectified by a rectifier bridge BD1 and then provides energy for a secondary conversion loop, and the high-voltage pulse signals are interfered to a secondary converter through the rectifier bridge BD1 by the primary EMI filtering loop 101, so that the operation is abnormal. After the rectifier bridge BD1, the circuit mainly forms a surge absorption anti-interference blanking circuit 102 (also called a high-voltage pulse absorption blanking circuit) by matching the inductor L1, the diode D7, the resistor R32, the resistor R36 and the capacitor CE4 with the capacitor C10, and the input high-voltage pulse signal is basically absorbed by the capacitor CE4 in the circuit, and as the capacity of the capacitor CE4 is a constant, when continuous pulses are continuously absorbed, the capacity range of the capacitor CE4 is broken through to damage the capacitor CE4, and the resistors R33, R8, R9 and R10 put the electricity of the positive electrode of the capacitor CE4 to the VCC input pin of the chip of the PWM signal generator to form a voltage release path, so that the capacity of the capacitor CE4 can not be suddenly changed, and the circuit can work for a long time. The two resistors R32, R36 in parallel with the diode D7 form a balanced bridge when no high voltage pulse is input, and the stored electricity of the capacitor CE4 is played back to the positive electrode of the power supply to be shared by the DC/DC converter. As the LED illumination lamp has the requirement on the PF value, the PF value is not influenced after the LED illumination lamp is added into the loop.
The impact-resistant protection circuit used on the driving power supply is suitable for the control of the protection circuit on the LED illumination driving power supply, improves the anti-interference and impact capability of the LED lamp, ensures that the LED lamp can normally work under severe input conditions, prolongs the service life of the LED lamp (bulb), and has wider product application range after the circuit is added. The circuit is added to the front stage of the converter, can be widely applied to power supply products with the need of improving lightning protection and surge protection, and is suitable for all electric appliances with required driving power supplies.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (1)
1. An impact protection circuit for use on a drive power supply, comprising: the drive power supply circuit comprises a PWM signal generator, a DC/DC converter and an output rectifying and filtering circuit, wherein the output end of the surge absorbing anti-interference blanking circuit is respectively connected with a VCC input pin of the PWM signal generator and the input end of the DC/DC converter, the PWM signal generator is connected with the DC/DC converter, the output end of the DC/DC converter is connected with the input end of the output rectifying and filtering circuit, the driving power supply circuit is an LED, the output end of the output rectifying and filtering circuit is connected with an LED bulb illuminant, the surge absorption anti-interference blanking circuit comprises an inductor L1, a diode D7, a resistor R32, a resistor R36, a capacitor CE4 and a capacitor C10, wherein one end of the inductor L1 is connected with the direct current output end of the rectifying bridge BD1, the other end of the inductor L1 is respectively connected with the anode of the diode D7, the resistor R32, the resistor R36 and the capacitor C10, the diode D7, the resistor R32 and the resistor R36 are connected in parallel, the resistor R36 and the capacitor CE4 are connected in series, the capacitor C10 is connected in parallel with the resistor R36 and the capacitor CE4, the cathode of the diode D7 is connected with the VCC input pin of the PWM signal generator, the anode of the capacitor CE4 is connected with the resistor R36, the cathode of the capacitor CE4 is grounded, and a resistor R33, a resistor R8, a resistor R9 and a resistor R10 are connected in series between the cathode of the diode D7 and the VCC input pin of the PWM signal generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810383033.7A CN108539969B (en) | 2018-04-26 | 2018-04-26 | Impact-resistant protection circuit used on driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810383033.7A CN108539969B (en) | 2018-04-26 | 2018-04-26 | Impact-resistant protection circuit used on driving power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108539969A CN108539969A (en) | 2018-09-14 |
| CN108539969B true CN108539969B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810383033.7A Active CN108539969B (en) | 2018-04-26 | 2018-04-26 | Impact-resistant protection circuit used on driving power supply |
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| CN (1) | CN108539969B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148567A (en) * | 1983-02-15 | 1984-08-25 | Matsushita Electric Works Ltd | Power source device |
| JPH07274531A (en) * | 1994-03-31 | 1995-10-20 | Toshiba Lighting & Technol Corp | Power system, discharge lamp lighting device, and lighting system |
| CN201774468U (en) * | 2010-03-01 | 2011-03-23 | 汤征宁 | Voltage dropping circuit with capacitor for filtering waves by using inducer |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN102917511A (en) * | 2012-11-06 | 2013-02-06 | 黄山乾龙电器有限公司 | Anti-lightning type LED (Light Emitting Diode) power supply |
| CN204697354U (en) * | 2015-06-23 | 2015-10-07 | 成都亿信标准认证集团有限公司 | Antisurge LED power circuit |
| CN205029930U (en) * | 2015-09-29 | 2016-02-10 | 宁波龙源照明电器有限公司 | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope |
| CN205946249U (en) * | 2016-07-11 | 2017-02-08 | 深圳飞德利照明科技有限公司 | Anti thunderbolt surge current keeps apart LED drive power supply |
| CN206712456U (en) * | 2017-03-17 | 2017-12-05 | 深圳市瑞旺光电科技有限公司 | LED power protection against lightning strikes circuit |
| CN107749665A (en) * | 2017-11-29 | 2018-03-02 | 国网上海市电力公司 | A kind of locking power supply uninterrupted power supply device and its application process |
| CN208433909U (en) * | 2018-04-26 | 2019-01-25 | 王俊 | A kind of shock resistance protective loop of use in driving power |
-
2018
- 2018-04-26 CN CN201810383033.7A patent/CN108539969B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148567A (en) * | 1983-02-15 | 1984-08-25 | Matsushita Electric Works Ltd | Power source device |
| JPH07274531A (en) * | 1994-03-31 | 1995-10-20 | Toshiba Lighting & Technol Corp | Power system, discharge lamp lighting device, and lighting system |
| CN201774468U (en) * | 2010-03-01 | 2011-03-23 | 汤征宁 | Voltage dropping circuit with capacitor for filtering waves by using inducer |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN102917511A (en) * | 2012-11-06 | 2013-02-06 | 黄山乾龙电器有限公司 | Anti-lightning type LED (Light Emitting Diode) power supply |
| CN204697354U (en) * | 2015-06-23 | 2015-10-07 | 成都亿信标准认证集团有限公司 | Antisurge LED power circuit |
| CN205029930U (en) * | 2015-09-29 | 2016-02-10 | 宁波龙源照明电器有限公司 | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope |
| CN205946249U (en) * | 2016-07-11 | 2017-02-08 | 深圳飞德利照明科技有限公司 | Anti thunderbolt surge current keeps apart LED drive power supply |
| CN206712456U (en) * | 2017-03-17 | 2017-12-05 | 深圳市瑞旺光电科技有限公司 | LED power protection against lightning strikes circuit |
| CN107749665A (en) * | 2017-11-29 | 2018-03-02 | 国网上海市电力公司 | A kind of locking power supply uninterrupted power supply device and its application process |
| CN208433909U (en) * | 2018-04-26 | 2019-01-25 | 王俊 | A kind of shock resistance protective loop of use in driving power |
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| Publication number | Publication date |
|---|---|
| CN108539969A (en) | 2018-09-14 |
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