CN103969498A - High-power high-frequency power supply output overvoltage detection circuit - Google Patents
High-power high-frequency power supply output overvoltage detection circuit Download PDFInfo
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- CN103969498A CN103969498A CN201410236936.4A CN201410236936A CN103969498A CN 103969498 A CN103969498 A CN 103969498A CN 201410236936 A CN201410236936 A CN 201410236936A CN 103969498 A CN103969498 A CN 103969498A
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Abstract
The invention discloses a high-power high-frequency power supply output overvoltage detection circuit. The circuit comprises a partial voltage sampling circuit, a voltage follower, a filter circuit, a linear opto-couple isolation circuit, an average value circuit, a comparison circuit and a signal shaping circuit, wherein a pulsed direct-current voltage output by a power supply outputs a regular overvoltage detection signal after respectively passing through the partial voltage sampling circuit, the voltage follower, the filter circuit, the linear opto-couple isolation circuit, the average value circuit, the comparison circuit and the signal shaping circuit; the overvoltage detection signal comprises power reduction running and stopping levels. By adopting the voltage follower, the filter circuit, the linear opto-couple isolation circuit and the signal shaping circuit, the accuracy of a detected signal can be improved, and the reliability of a high-power high-frequency power supply can be effectively enhanced through two levels of overvoltage detection signals.
Description
Technical field
The present invention relates to a kind of testing circuit, specifically a kind of high-power high-frequency power supply output overvoltage testing circuit.
Background technology
Along with industrial fast development, traditional power frequency power supply mode can not meet current power requirement.Traditional power frequency power supply art dynamic response is slow, high-pressure side output voltage ripple is large, efficiency is low, energy consumption is large, power factor (PF) is little, grid side harmonic pollution serious, electrical network electricity consumption imbalance, and the shortcomings of this power supply mode has determined that it can be replaced by novel power supply mode gradually.Along with the development of electric power power technology, high frequency power supply mode emerges, and it can improve above-mentioned shortcoming well, improves power-efficient, and increasing power factor realizes energy-conservationly, but high frequency power supply mode also increases with respect to the system complexity of power frequency power supply mode thereupon.High-power high-frequency power supply there will be at any time average to transfinite in operational process; if do not send any signal; high frequency electric source output voltage may further transfinite; cause transformer core to cause turn-to-turn short circuit because bearing too high voltages; burn iron core; if send immediately stoppage protection signal, can reduce the operational use time of high frequency electric source.Therefore the output voltage of high-power high-frequency power supply being carried out to two-stage overvoltage detection has great significance.
Summary of the invention
The object of this invention is to provide a kind of high-power high-frequency power supply output overvoltage testing circuit, the present invention adopts voltage follower, filtering circuit and linear optical coupling buffer circuit effectively to improve the precision of measured signal, has effectively improved the reliability of high-power high-frequency power supply by the overvoltage detection signal of two ranks.
The present invention is achieved through the following technical solutions:
A kind of high-power high-frequency power supply output overvoltage testing circuit, is characterized in that: this circuit comprises the pressure sampling circuit, voltage follower, filtering circuit, linear optical coupling buffer circuit, averaging circuit and the comparator circuit that are linked in sequence successively; Pressure sampling circuit is connected with the output voltage of high frequency electric source; The output voltage process pressure sampling circuit of high frequency electric source obtains the small-signal with output ripple voltage relation in direct ratio; Then involve spike pulse by voltage follower, filtering circuit, the filtering of linear optical coupling buffer circuit are humorous; Obtain again the mean value of sampled signal by averaging circuit; Export downrating and shut down two paths of signals by comparator circuit again; Finally and rising certain by signal transformation circuit output pulse width, the regular square wave that negative edge is precipitous.
In the present invention, pressure sampling circuit collects small voltage signal by divider resistance, and at the unidirectional Transient Suppression Diode of small voltage signal two ends inverse parallel, prevents that high pressure from sealing in late-class circuit.
Linear optical coupling buffer circuit has following function: prevent that front late-class circuit from interfering with each other, particularly prevent that front stage circuits spike pulse from sealing in late-class circuit.
Comparator circuit comprises two comparing units; One of them is used for exporting downrating signal, and another is used for exporting stopping signal.
Signal transformation circuit) formed by the reverse trigger of Schmidt and monostalbe trigger.
The present invention adopts voltage follower, filtering circuit and linear optical coupling buffer circuit effectively to improve the precision of measured signal, has effectively improved the reliability of high-power high-frequency power supply by the overvoltage detection signal of two ranks.
Brief description of the drawings
Fig. 1 is systematic schematic diagram of the present invention.
Embodiment
A kind of high-power high-frequency power supply output overvoltage testing circuit, is shown in Fig. 1, and this circuit comprises pressure sampling circuit 1, voltage follower 2, filtering circuit 3, linear optical coupling buffer circuit 4, averaging circuit 5, comparator circuit 6 and signal transformation circuit 7.The pulsating volage of high frequency electric source output is converted into small voltage signal by pressure sampling circuit, and this voltage signal is directly proportional to the output voltage of power supply; At the unidirectional Transient Suppression Diode of small voltage signal two ends inverse parallel, prevent that high pressure from sealing in late-class circuit simultaneously.
The small voltage signal of pressure sampling circuit output, late-class circuit before first isolating by voltage follower, prevents that front late-class circuit from interfering with each other; Then by filtering circuit filtering harmonic component; By late-class circuit before the isolation of linear optical coupling buffer circuit, prevent that front late-class circuit from interfering with each other again, particularly front stage circuits spike pulse seals in late-class circuit; Obtain again the mean value of sampled signal by averaging circuit; Export downrating and shut down two paths of signals by comparator circuit again, finally and rising certain by signal transformation circuit output pulse width, the regular square wave that negative edge is precipitous.
The present invention adopts voltage follower, filtering circuit, linear optical coupling buffer circuit and signal transformation circuit effectively to improve the precision of measured signal, has effectively improved the reliability of high-power high-frequency power supply by the overvoltage detection signal of two ranks.
Claims (5)
1. a high-power high-frequency power supply output overvoltage testing circuit, is characterized in that: this circuit comprises the pressure sampling circuit (1), voltage follower (2), filtering circuit (3), linear optical coupling buffer circuit (4), averaging circuit (5), comparator circuit (6), the signal transformation circuit (7) that are linked in sequence successively; Pressure sampling circuit (1) is connected with the output voltage of high frequency electric source; The output voltage process pressure sampling circuit (1) of high frequency electric source obtains the small voltage signal with output voltage relation in direct ratio; Then involve spike pulse by voltage follower (2), filtering circuit (3), linear optical coupling buffer circuit (4) filtering are humorous; Obtain again the mean value of sampled signal by averaging circuit (5); Again by comparator circuit (6) output downrating and shut down two paths of signals, finally and rising certain by signal transformation circuit (7) output pulse width, the regular square wave that negative edge is precipitous.
2. high-power high-frequency power supply output overvoltage testing circuit according to claim 1, it is characterized in that: pressure sampling circuit (1) collects small voltage signal by divider resistance, and at the unidirectional Transient Suppression Diode of small voltage signal two ends inverse parallel, prevent that high pressure from sealing in late-class circuit.
3. high-power high-frequency power supply output overvoltage testing circuit according to claim 1, is characterized in that: described linear optical coupling buffer circuit (4) prevents that front late-class circuit from interfering with each other.
4. high-power high-frequency power supply output overvoltage testing circuit according to claim 1, is characterized in that: described comparator circuit (6) comprises two comparing units; One of them is used for exporting downrating signal, and another is used for exporting stopping signal.
5. high-power high-frequency power supply output overvoltage testing circuit according to claim 1, is characterized in that: described signal transformation circuit (7) is made up of the reverse trigger of Schmidt and monostalbe trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236936.4A CN103969498A (en) | 2014-05-30 | 2014-05-30 | High-power high-frequency power supply output overvoltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236936.4A CN103969498A (en) | 2014-05-30 | 2014-05-30 | High-power high-frequency power supply output overvoltage detection circuit |
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| CN103969498A true CN103969498A (en) | 2014-08-06 |
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| CN201410236936.4A Pending CN103969498A (en) | 2014-05-30 | 2014-05-30 | High-power high-frequency power supply output overvoltage detection circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734331A (en) * | 2015-04-04 | 2015-06-24 | 佛山蓝途科技有限公司 | Voltage sampling circuit for double-power-source change-over switch electric appliance |
| CN106405309A (en) * | 2016-08-31 | 2017-02-15 | 武汉海奥电气有限公司 | System and method for rapidly determining single phase earth fault |
| CN109167534A (en) * | 2018-09-26 | 2019-01-08 | 上海雷诺尔科技股份有限公司 | A kind of mesohigh solid state motor soft starter high-frequency isolation power supply circuit |
| CN112098902A (en) * | 2020-08-31 | 2020-12-18 | 贵州天义电器有限责任公司 | Multichannel load on-off state acquisition circuit based on 28V DC power circuit |
| CN113985102A (en) * | 2021-09-17 | 2022-01-28 | 阳春新钢铁有限责任公司 | System and method for detecting dynamic voltage of dual power cabinet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02218967A (en) * | 1989-02-21 | 1990-08-31 | Hitachi Lighting Ltd | Power failure detection signal apparatus of dc stabilized power supply |
| US20080130183A1 (en) * | 2004-10-04 | 2008-06-05 | Daikin Industries, Ltd. | Power Supply Circuit Protecting Method and Apparatus for the Same |
| CN102128972A (en) * | 2011-01-12 | 2011-07-20 | 重庆市电力公司城区供电局 | Sensor device for monitoring transient voltage of broadband integral type power grid |
| CN102135558A (en) * | 2010-11-05 | 2011-07-27 | 重庆市电力公司綦南供电局 | Acquisition and hierarchical identification system of overvoltage data and hierarchical pattern identification method of overvoltage types |
| CN201965176U (en) * | 2010-12-08 | 2011-09-07 | 杨义根 | Two-stage over-current detection device |
| CN203909133U (en) * | 2014-05-30 | 2014-10-29 | 江苏容天机电科技有限公司 | Large power high frequency power supply output overvoltage detection circuit |
-
2014
- 2014-05-30 CN CN201410236936.4A patent/CN103969498A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02218967A (en) * | 1989-02-21 | 1990-08-31 | Hitachi Lighting Ltd | Power failure detection signal apparatus of dc stabilized power supply |
| US20080130183A1 (en) * | 2004-10-04 | 2008-06-05 | Daikin Industries, Ltd. | Power Supply Circuit Protecting Method and Apparatus for the Same |
| CN102135558A (en) * | 2010-11-05 | 2011-07-27 | 重庆市电力公司綦南供电局 | Acquisition and hierarchical identification system of overvoltage data and hierarchical pattern identification method of overvoltage types |
| CN201965176U (en) * | 2010-12-08 | 2011-09-07 | 杨义根 | Two-stage over-current detection device |
| CN102128972A (en) * | 2011-01-12 | 2011-07-20 | 重庆市电力公司城区供电局 | Sensor device for monitoring transient voltage of broadband integral type power grid |
| CN203909133U (en) * | 2014-05-30 | 2014-10-29 | 江苏容天机电科技有限公司 | Large power high frequency power supply output overvoltage detection circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734331A (en) * | 2015-04-04 | 2015-06-24 | 佛山蓝途科技有限公司 | Voltage sampling circuit for double-power-source change-over switch electric appliance |
| CN106405309A (en) * | 2016-08-31 | 2017-02-15 | 武汉海奥电气有限公司 | System and method for rapidly determining single phase earth fault |
| CN109167534A (en) * | 2018-09-26 | 2019-01-08 | 上海雷诺尔科技股份有限公司 | A kind of mesohigh solid state motor soft starter high-frequency isolation power supply circuit |
| CN112098902A (en) * | 2020-08-31 | 2020-12-18 | 贵州天义电器有限责任公司 | Multichannel load on-off state acquisition circuit based on 28V DC power circuit |
| CN113985102A (en) * | 2021-09-17 | 2022-01-28 | 阳春新钢铁有限责任公司 | System and method for detecting dynamic voltage of dual power cabinet |
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Application publication date: 20140806 |
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