CN204068263U - A kind of Active Power Filter-APF with humidity protection - Google Patents
A kind of Active Power Filter-APF with humidity protection Download PDFInfo
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- CN204068263U CN204068263U CN201420560087.3U CN201420560087U CN204068263U CN 204068263 U CN204068263 U CN 204068263U CN 201420560087 U CN201420560087 U CN 201420560087U CN 204068263 U CN204068263 U CN 204068263U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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Abstract
A kind of Active Power Filter-APF with humidity protection; comprise drive circuit, controller, current detection circuit, outside three-phase input circuit, filtering main circuit; also comprise humidity protective circuit, described humidity protective circuit comprises sensor circuit, for detecting IGBT ambient humidity.First delay circuit, the second delay circuit, warning circuit, for reminding user's humidity environment abnormal; Protective circuit, for the protection of IGBT not because of humidity extraordinary failure; Protection switch; be connected to filtering main circuit and and outside three phase mains between; in response to the second delay circuit; the relatively independent setting of each module; both can effectively coordinate; again can so that maintenance, and facilitate each circuit module improvement is set, and can play when Active Power Filter-APF humidity is abnormal and report to the police and the effect of protection.
Description
Technical field
The utility model relates to a kind of Active Power Filter-APF, and more particularly, it relates to a kind of Active Power Filter-APF with humidity protection.
Background technology
Active Power Filter-APF (APF) is a kind of novel electric power electric device for dynamic harmonic wave, compensating reactive power, and the harmonic wave that it all can change size and frequency and the idle of change compensate.It is the novel electric power harmonic wave control special equipment adopting modern power electronics technology and make based on the Digital Signal Processing of high-speed dsp device.It is made up of instruction current computing circuit and offset current circuit for generating two major parts.Electric current in instruction current computing circuit real time monitoring circuit, and analog current signal is converted to digital signal, send into high speed digital signal processor (DSP) to process signal, harmonic wave is separated with first-harmonic, and send driving pulse with pulse-width modulation (PWM) signal form to offset current circuit for generating, drive IGBT or IPM power model, generate equal with mains by harmonics current amplitude, opposite polarity offset current and inject electrical network, harmonic current compensated or offsets, initiatively eliminating electric harmonic.
Now commercially modal: shunt active power filter electrical equipment, its circuit comprises drive circuit, controller, current detection circuit, outside three-phase input circuit, filtering main circuit and protective circuit.The situation of overcurrent-overvoltage in protective circuit testing circuit; and by Quick shut-off device, whole filter power supply is turned off; its peripheral three-phase input circuit is made up of three instrument transformers; former limit Motor Winding Same Name of Ends is connected to outside three-phase circuit respectively; its name is respectively X phase outside three-phase input circuit, Y phase outside three-phase input circuit, the outside three-phase input circuit of Z phase; different name termination external loading, the vice-side winding of three instrument transformers is connected with filtering main circuit.Filtering main circuit is by the three-phase bridge rectifier circuit preventing the filtering impedance of voltage jump, be made up of six IGBT switches, and six fast diodes are respectively arranged with on six IGBT switches, be divided into three filter circuits, X phase filter circuit, Y phase filter circuit, Z phase filter circuit.For the dead zone protection of IGBT switch.The turn-on and turn-off of the IGBT switches set of filtering main circuit are controlled by controller, controller detects harmonic wave by current detection circuit (high-pass filtering circuit), be converted into digital signal by its computing, then control the break-make of filtering main circuit IGBT switch by drive circuit.
Existing IGBT switch Problems existing, except the problem of temperature well-known to those skilled in the art and power consumption, also has a problem, if the ambient humidity of IGBT switch-linear hybrid is too high, and cause condensation to lose efficacy, general, under IGBT should be operated in normal damp condition, normal wetting is defined as about 45 ~ 75%, but in the use of actual Active Power Filter-APF, Active Power Filter-APF usually can not ensure residing ambient humidity, so once humidity is too high or too low, all probably causes the IGBT pipe of active filter to damage.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of Active Power Filter-APF with humidity protection.
For achieving the above object, the utility model provides following technical scheme: a kind of Active Power Filter-APF with humidity protection, comprise drive circuit, controller, current detection circuit, outside three-phase input circuit, filtering main circuit, also comprise humidity protective circuit, described humidity protective circuit comprises sensor circuit, being connected to the node formed between outside three-phase input circuit and filtering main circuit, for detecting IGBT ambient humidity, and exporting humidity abnormal signal; First delay circuit, is connected to sensor circuit, in response to humidity abnormal signal, and exports the first time delayed signal; Second delay circuit, is connected to the first delay circuit, is controlled by the first time delayed signal, and exports the second time delayed signal; Warning circuit, is connected to the second delay circuit, is controlled by the first time delayed signal, and output alarm signal, for reminding user's humidity environment abnormal;
Protective circuit, is connected to the second delay circuit and warning circuit, is controlled by the second time delayed signal, for the protection of IGBT not because of humidity extraordinary failure; Protection switch, be connected to filtering main circuit and and outside three phase mains between, in response to the second delay circuit, during for receiving the second time delayed signal, jump disconnected connection between active filter and outside three-phase circuit.
So, when Active Power Filter-APF ambient humidity is abnormal (too high or too low), sensor circuit senses abnormality, signal is sent to the first delay circuit, first delay circuit receives abnormal signal, through the time delay of short time, determine that the signal sent is errorless, so send signal to the second delay circuit and warning circuit, warning circuit warning reminding user humidity abnormal conditions, if a period of time humidity abnormal conditions are still not processed, so the second delay circuit can send signal to protective circuit, trigger protection switch motion, thus the annexation disconnected between Active Power Filter-APF and outside three-phase circuit, play the effect of a humidity protection.
The utility model can be set to further: described sensor circuit comprises positive humidity coefficient humistor, and an end is connected to the node formed between outside three-phase input circuit and filtering main circuit; Negative humidity coefficient humistor, the in parallel and quick resistance of positive temperature coefficient humidity; First AC relay coil, one is terminated at one end that positive humidity coefficient humistor does not connect outside three phase mains, its other end ground connection.By being arranged in parallel of positive humidity coefficient humistor and negative humidity coefficient humistor, humidity under normal circumstances two resistances arranges identical, its coefficient because of humidity change also arranges identical, too high or too low once humidity, the quick resistance of one of them humidity raises, another humistor resistance reduces, so according to resistor coupled in parallel formula, its equivalent resistance resistance formed also can also can reduce in corresponding reduction, when resistance is reduced to certain value, in first AC relay coil, electric current also can increase to and meet adhesive condition, signal is sent to sensor circuit, by such setting, well play humidity environment too high or too low time, all can transmit a signal to the first delay circuit, it is simple to cut structure, has greatly saved costs such as designing and developing.
The utility model can be set to further: described first delay circuit comprises the first AC relay switch, and an end is connected to outside three phase mains, and in response to the first AC relay coil, on off state is set to often open; First time-delay relay coil, an end is connected to the first AC relay switch, other end ground connection.
Arrange during short time-delay by the first AC relay coil; if the armature on the first AC relay switch is by adhesive; so just have electric current in the first time-delay relay coil to flow through; if but the first AC relay switch is instantaneous by adhesive; again because humidity is normal or other situations disconnect; so the first time-delay relay coil reclocking, guarantee the second delay circuit and warning circuit can not send rub-out signal mutually.
The utility model can be set to further: described second delay circuit comprises the first time-delay relay switch, and in response to the first time-delay relay coil, an end is connected to outside three phase mains, and on off state is set to often open; Second time-delay relay coil, an end is connected to the first time-delay relay switch, and the other end is connected to warning circuit.
When the first delay circuit judges errorless, when sending signal to the second delay circuit, can report to the police by guide alarm circuit simultaneously, and process humidity abnormal problem to user's a period of time, if in a period of time, problem is rationally solved, so the first time-delay relay does not receive the signal of the persistent anomaly sent in the first time-delay relay coil and disconnects, thus disconnection warning circuit, Active Power Filter-APF is normally worked, if after a period of time, humidity abnormal conditions are appointed and so cannot be properly settled, so the second time-delay relay coil can send signal to protective circuit, jump disconnected Active Power Filter-APF main circuit.
The utility model can be set to further: described warning circuit comprises alarm lamp, and an end is connected to the second time-delay relay coil; Buzzer, an end is connected to alarm lamp;
By being arranged in series of buzzer and alarm lamp, a good alarm function can be played, and save economical, the demand of user can be met preferably.
The utility model can be set to further: described protective circuit comprises the second AC relay coil, and an end is connected to outside three-phase circuit, for controlling the action of second switch group; Second time-delay relay switch, in response to the second time-delay relay coil, an end is connected to the second AC relay coil, and the neutral ground of another termination, on off state is set to normally closed.
By such setting, once forward delay interval signal in the second delay circuit, the second AC relay coil adhesive protection switch is jumped disconnected, thus plays the effect of a protection, arranges like this, and structure is simple, and reaction speed is very fast.
Compared with prior art; the utility model has the advantage of: the relatively independent setting of each module, both can effectively coordinate, again can so that maintenance; and facilitate each circuit module improvement is set, and can play when Active Power Filter-APF humidity is abnormal and report to the police and the effect of protection.
Accompanying drawing explanation
Fig. 1 is the Active Power Filter-APF circuit diagram of band humidity protection;
Fig. 2 is humidity protective circuit circuit diagram.
Reference numeral: 1, outside three-phase input circuit; 2, filtering main circuit; 3, sensor circuit; 4, the first delay circuit; 5, the second delay circuit; 6, warning circuit; 7, protective circuit.
Embodiment
Referring to figs. 1 through Fig. 2, embodiment of the present utility model is described further.
With an Active Power Filter-APF for humidity protection, comprise drive circuit, controller, current detection circuit, outside three-phase input circuit, filtering main circuit, also comprise humidity protective circuit, described humidity protective circuit comprises
Sensor circuit 3, is connected to the node formed between outside three-phase input circuit and filtering main circuit, comprises positive humidity coefficient humistor R1, and an end is connected to the node formed between outside three-phase input circuit and filtering main circuit; Negative humidity coefficient humistor R2, the in parallel and quick resistance of positive temperature coefficient humidity; First AC relay coil KM1, one is terminated at one end that positive humidity coefficient humistor R1 does not connect outside three phase mains, its other end ground connection.Being arranged in parallel of quick resistance is executed by positive humidity coefficient humistor R1 and negative humidity coefficient, humidity under normal circumstances two resistances arranges identical, too high or too low once humidity, the quick resistance of one of them humidity raises, another humistor resistance reduces, so according to resistor coupled in parallel formula, its equivalent resistance resistance formed also can also can reduce in corresponding reduction, when resistance is reduced to certain value, in first AC relay coil KM1, electric current also can increase to and meet adhesive condition, sends signal to sensor circuit; By such setting, well play an ambient humidity more than 70% or lower than 50% time, all can trigger the first delay circuit time delay, in order to leave certain humidity nargin when arranging like this, capital transmits a signal to the first delay circuit, cuts structure simply, has greatly saved costs such as designing and developing.
First delay circuit 4, is connected to sensor circuit, and in response to sensor circuit, comprise the first AC relay switch, an end is connected to outside three phase mains, and in response to the first AC relay coil KM1, on off state is set to often open; First time-delay relay coil KT1, an end is connected to the first AC relay switch, other end ground connection.Arrange during short time-delay by the first AC relay coil KM1; if the armature on the first AC relay switch is by adhesive; so just have electric current in the first time-delay relay coil KT1 to flow through; if but the first AC relay switch is instantaneous by adhesive; again because humidity is normal or other situations disconnect; so the first time-delay relay coil KT1 reclocking; guarantee the second delay circuit and warning circuit can not send rub-out signal mutually; described time-delay relay coil model elects JSZ3 series as, and set of time is 0.1 second.
Second delay circuit 5, is connected to the first delay circuit, is controlled by the first delay circuit, comprises the first time-delay relay K switch T1, and in response to the first time-delay relay coil KT1, an end is connected to outside three phase mains, and on off state is set to often open; Second time-delay relay coil; one end is connected to the first time-delay relay K switch T1; the other end is connected to warning circuit; described time-delay relay coil model elects JSZ3 series as; delay time is set to 3 minutes; once Active Power Filter-APF ambient humidity, light and temperature is still abnormal after 3 minutes, so trigger protection circuit will be protected by whole electrical appliance, prevent from damaging.
When the first delay circuit judges errorless, when sending signal to the second delay circuit, can report to the police by guide alarm circuit simultaneously, and process humidity abnormal problem to user's a period of time, if in a period of time, problem is rationally solved, so the first time-delay relay does not receive the signal of the persistent anomaly sent in the first time-delay relay coil KT1 and disconnects, thus disconnection warning circuit, Active Power Filter-APF is normally worked, if after a period of time, humidity abnormal conditions are appointed and so cannot be properly settled, so the second time-delay relay coil can send signal to protective circuit, jump disconnected Active Power Filter-APF main circuit.
Warning circuit 6, is connected to the second delay circuit, is controlled by the first delay circuit, and for reminding user's humidity environment abnormal, comprise alarm lamp EL, an end is connected to the second time-delay relay coil; Buzzer SP, an end is connected to alarm lamp EL; First AC relay coil KM1, an end is connected to buzzer SP, and the neutral ground of another termination, for controlling the first switches set action.By being arranged in series of buzzer SP and alarm lamp EL, can play a good alarm function, and save economical, can meet the demand of user preferably, buzzer SPSP model elects LZQ-2715B220V as, and alarm lamp EL model elects LTE5071J as.
Protective circuit 7, is connected to the second delay circuit and warning circuit, is controlled by the second delay circuit, and for the protection of IGBT not because of humidity extraordinary failure, comprise the second AC relay coil, an end is connected to outside three-phase circuit, for controlling the action of second switch group; Second time-delay relay K switch T2, in response to the second time-delay relay coil, an end is connected to the second AC relay coil, and the neutral ground of another termination, on off state is set to normally closed.By such setting, once forward delay interval signal in the second delay circuit, the second AC relay coil adhesive protection switch KM2 jumps disconnected, thus plays the effect of a protection, arranges like this, and structure is simple, and reaction speed is very fast.
Protection switch KM2, be connected to filtering main circuit and and outside three phase mains between, in response to the second delay circuit.
By such setting, sensor circuit judges that whether ambient humidity is abnormal, first delay circuit judges whether sensor circuit sends normal signal, after judging that signal is errorless, trigger alarm circuit alarm, the second delay circuit is used for can playing when reporting to the police the effect that gives certain hour process humidity.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. the Active Power Filter-APF with humidity protection, comprise drive circuit, controller, current detection circuit, outside three-phase input circuit, filtering main circuit, it is characterized in that: also comprise humidity protective circuit, described humidity protective circuit comprises
Sensor circuit, is connected to the node formed between outside three-phase input circuit and filtering main circuit, for detecting IGBT ambient humidity, and exports humidity abnormal signal;
First delay circuit, is connected to sensor circuit, in response to humidity abnormal signal, and exports the first time delayed signal;
Second delay circuit, is connected to the first delay circuit, is controlled by the first time delayed signal, and exports the second time delayed signal;
Warning circuit, is connected to the second delay circuit, is controlled by the first time delayed signal, and output alarm signal, for reminding user's humidity environment abnormal;
Protective circuit; be connected to the second delay circuit and warning circuit; be controlled by the second time delayed signal; comprise protection switch; be connected to filtering main circuit and and outside three phase mains between, in response to the second delay circuit, when receiving the second time delayed signal; jump disconnected connection between active filter and outside three-phase circuit, for the protection of IGBT not because of humidity extraordinary failure.
2. a kind of Active Power Filter-APF with humidity protection according to claim 1, is characterized in that: described sensor circuit comprises
Positive humidity coefficient humistor, an end is connected to the node formed between outside three-phase input circuit and filtering main circuit;
Negative humidity coefficient humistor, is parallel to the quick resistance of positive temperature coefficient humidity;
First AC relay coil, one is terminated at one end that positive humidity coefficient humistor does not connect outside three phase mains, its other end ground connection.
3. a kind of Active Power Filter-APF with humidity protection according to claim 1, is characterized in that: described first delay circuit comprises
First AC relay switch, an end is connected to outside three phase mains, and in response to the first AC relay coil, on off state is set to often open;
First time-delay relay coil, an end is connected to the first AC relay switch, other end ground connection.
4. a kind of Active Power Filter-APF with humidity protection according to claim 1, is characterized in that: described second delay circuit comprises
First time-delay relay switch, in response to the first time-delay relay coil, an end is connected to outside three phase mains, and on off state is set to often open;
Second time-delay relay coil, an end is connected to the first time-delay relay switch, and the other end is connected to warning circuit.
5. a kind of Active Power Filter-APF with humidity protection according to claim 1, is characterized in that: described warning circuit comprises
Alarm lamp, an end is connected to the second time-delay relay coil;
Buzzer, an end is connected to alarm lamp.
6. a kind of Active Power Filter-APF with humidity protection according to claim 1, is characterized in that: described protective circuit comprises
Second AC relay coil, an end is connected to outside three-phase circuit, for controlling the action of second switch group;
Second time-delay relay switch, in response to the second time-delay relay coil, an end is connected to the second AC relay coil, and the neutral ground of another termination, on off state is set to normally closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420560087.3U CN204068263U (en) | 2014-09-26 | 2014-09-26 | A kind of Active Power Filter-APF with humidity protection |
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| CN201420560087.3U CN204068263U (en) | 2014-09-26 | 2014-09-26 | A kind of Active Power Filter-APF with humidity protection |
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| CN204068263U true CN204068263U (en) | 2014-12-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777805A (en) * | 2015-02-11 | 2015-07-15 | 北京配天技术有限公司 | Industrial robot safety control system as well as backup safety circuit and safety module |
| CN104821556A (en) * | 2015-04-15 | 2015-08-05 | 国家电网公司 | Layered protecting configuration of outdoor low-voltage distribution area active compensation device and fault handling method |
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2014
- 2014-09-26 CN CN201420560087.3U patent/CN204068263U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777805A (en) * | 2015-02-11 | 2015-07-15 | 北京配天技术有限公司 | Industrial robot safety control system as well as backup safety circuit and safety module |
| WO2016127830A1 (en) * | 2015-02-11 | 2016-08-18 | 深圳配天智能技术研究院有限公司 | Industrial robot safety control system, backup safety circuit, and safety module |
| CN104777805B (en) * | 2015-02-11 | 2017-12-15 | 北京配天技术有限公司 | A kind of industrial robot safety control system and backup safety circuit, security module |
| US10317885B2 (en) | 2015-02-11 | 2019-06-11 | Shenzhen A&E Intelligent Technology Institute Co., Ltd. | Safety circuit, back-up safety circuit and industrial robot safety control system |
| CN104821556A (en) * | 2015-04-15 | 2015-08-05 | 国家电网公司 | Layered protecting configuration of outdoor low-voltage distribution area active compensation device and fault handling method |
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Address after: 325600 Yueqing Economic Development Zone, Zhejiang, China, No. 20, No. Patentee after: Zhejiang Baigu Electric Technology Co., Ltd. Address before: 325600 Yueqing Economic Development Zone, Wenzhou, No. 20 weft Road No. 271, Zhejiang Patentee before: BaiGu Electric Co., Ltd. |