CN103715970B - A kind of frequency converter motor-drive circuit and frequency converter - Google Patents
A kind of frequency converter motor-drive circuit and frequency converter Download PDFInfo
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- CN103715970B CN103715970B CN201410028847.0A CN201410028847A CN103715970B CN 103715970 B CN103715970 B CN 103715970B CN 201410028847 A CN201410028847 A CN 201410028847A CN 103715970 B CN103715970 B CN 103715970B
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Abstract
The invention discloses a kind of frequency converter motor-drive circuit, be applied to frequency converter, it comprises the rectification module connecting successively, soft-start module, filtration module, control module and inversion module, this frequency converter motor-drive circuit also comprises: between the filtration module of frequency converter and inversion module, add an open type gate-controlled switch, in the time that frequency converter is not thrown electricity, filtration module and inversion module are connected to disconnection, in the time that correct wiring is RST throwing electricity, power supply charges to filter capacitor module by rectification module, after control circuit starts up, control module output control signal control open type gate-controlled switch closure, frequency converter can normally be exported, in the time that inverter output terminal received by power line by mistake, throw electricity and cannot form closed-loop path, control section keeps power failure state, i.e. safe condition because filter capacitor cannot charge always, can effectively avoid frequency converter to cause aircraft bombing because of mis-wired, avoid the loss of fault type. the invention also discloses a kind of frequency converter.
Description
Technical field
The present invention relates to motor actuation techniques field, in particular, relate to a kind of frequency converter motor and driveMoving circuit and frequency converter.
Background technology
At present, frequency converter is mainly used in motor driver, and it mainly realizes AC-DC-AC conversion. BecomeFrequently device comprises the main mould such as rectification module, soft-start module, filtration module, control module and inversion modulePiece, input ac power is direct current by rectification module rectification, from filtration module, voltage after rectification is becomeLevel and smooth DC voltage, then through control module control inversion module, direct current is converted to alternating current, softStarting module Main Function is to limit the current peak to filter capacitor while throwing electricity, to protect rectification module to exempt fromThereby damaged by larger charging current, but frequency converter is while applying at the scene, power line misconnection may be arrivedInversion module output, in the time throwing electricity, power supply also can be realized rectification by the diode in inversion module, rightFiltration module charges, but owing to there is no the current-limiting protection of soft starting circuit at inversion module end, can leadThereby cause inversion module and bear larger charging current damage, even if inversion module does not damage, now operation becomesFrequently device also may cause the peril of short circuit aircraft bombing.
Therefore, need special standby attention for the reversal connection of frequency converter, provide a kind of frequency converter motor to drive electricityRoad and frequency converter, avoid causing inversion module to bear larger charging current in the time of mis-wired and cause inversion moduleDamage or cause the peril of short circuit aircraft bombing, be those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of frequency converter motor-drive circuit and frequency converter, existing to overcomeHave while application at the scene due to frequency converter in technology, may be by power line misconnection to inversion module output,Also can realize rectification by the diode in inversion module throwing when electricity power supply, but due at inversion module endThere is no the current-limiting protection of soft starting circuit, thus can cause inversion module to bear that larger charging current is damaged orCause the problem of the peril of short circuit aircraft bombing.
For achieving the above object, the invention provides following technical scheme:
A kind of frequency converter motor-drive circuit, is applied to frequency converter, and described circuit comprises connect successively wholeFlow module, soft-start module, filtration module, control module and inversion module, also comprise: open type canControl switch, wherein,
The input of described rectification module is connected with power end, the first end of described rectification module and described softThe first end starting is connected;
The second end of described soft start is connected with the first end of described filtration module;
The second end of described rectification module is connected with the second end of described filtration module;
Described control module is in parallel with described filtration module;
The first end of described inversion module is connected with the first end of described filtration module, described inversion moduleThe second end is connected with the second end of described filtration module;
The first end of described open type gate-controlled switch is connected with the first end of described filtration module, describedly often opensThe second end of type gate-controlled switch is connected with the first end of described inversion module;
The 3rd end of described inversion module is output;
The power supply of described power end charges to described filtration module by described rectification module, when describedAfter filtration module has charged, start the control circuit of described control module, described control module output controlOpen type gate-controlled switch closure described in signal controlling processed.
Wherein, described rectification module comprises: three groups of diode groups in parallel in the same way, every group is connected in series twoIndividual diode, the respectively input as described rectification module at described diode group extracting power supply cord.
Wherein, described soft-start module comprises: a resistance and the open type being connected in parallel with described resistanceGate-controlled switch.
Wherein, described filtration module comprises filter capacitor, the just very described filtering mould of described filter capacitorThe first end of piece, the second end that negative pole is described filtration module.
The invention also discloses a kind of frequency converter, comprise frequency converter motor-drive circuit described above.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of frequency converterMotor-drive circuit, is applied to frequency converter, it comprise successively the rectification module that connects, soft-start module,Filtration module, control module and inversion module, this frequency converter motor-drive circuit also comprises: open type canControl switch, this invention adds an open type gate-controlled switch between filtration module and inversion module, is becomingFrequently, when device is not thrown electricity, filtration module and inversion module are connected to disconnection, in the time that correct wiring is RST throwing electricity,Power supply charges to filter capacitor module by rectification module, after control circuit starts up, and controlMolding piece output control signal control open type gate-controlled switch closure, frequency converter can normally be exported; When mistake willWhen power line is received inverter output terminal, throw electricity and cannot form closed-loop path, control section is because filtered electricalAppearance cannot be charged and be kept power failure state always, i.e. safe condition, can effectively avoid frequency converter because of misconnectionLine and cause aircraft bombing, avoids the loss of fault type. The invention also discloses a kind of frequency converter, can effectively keep awayExempt from frequency converter and cause aircraft bombing because of mis-wired, avoid the loss of fault type.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to realityThe accompanying drawing of executing required use in example or description of the Prior Art is briefly described, apparently, belowAccompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, notPay under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the main structure schematic diagram of the disclosed a kind of frequency converter motor-drive circuit of the embodiment of the present invention;
Fig. 2 is the corresponding sequential chart of the correct wiring of the disclosed frequency converter motor-drive circuit of the embodiment of the present invention;
Fig. 3 is the corresponding sequential chart of the mis-wired of the disclosed frequency converter motor-drive circuit of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried outDescribe clearly and completely, obviously, described embodiment is only the present invention's part embodiment, andNot whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art are not doingGo out the every other embodiment obtaining under creative work prerequisite, all belong to the scope of protection of the invention.
The invention discloses a kind of frequency converter motor-drive circuit, be applied to frequency converter, it comprises successively and connectingThe rectification module, soft-start module, filtration module, control module and the inversion module that connect, this frequency converter electricityDrive circuit also comprises: open type gate-controlled switch, this invention is at filtration module and the inversion mould of frequency converterBetween piece, add an open type gate-controlled switch, in the time that frequency converter is not thrown electricity, filtration module and inversion moduleBe connected to disconnection, when correct wiring is that RST throws when electricity, power supply by rectification module to filter capacitor moduleCharge, after control circuit starts up, control module output control signal control open type canControl switch closure, frequency converter can normally be exported; In the time that inverter output terminal received by power line by mistake, throw electricityCannot form closed-loop path, control section keeps power failure state always because filter capacitor cannot charge,Be safe condition, can effectively avoid frequency converter to cause aircraft bombing because of mis-wired, avoid the loss of fault type.The invention also discloses a kind of frequency converter, can effectively avoid frequency converter to cause aircraft bombing because of mis-wired, keep awayExempt from the loss of fault type.
Referring to accompanying drawing 1, is the main structure of the disclosed a kind of frequency converter motor-drive circuit of the embodiment of the present inventionSchematic diagram. The embodiment of the invention discloses a kind of frequency converter motor-drive circuit, be applied to frequency converter, instituteState circuit and comprise the rectification module 1, soft-start module 2, filtration module 3, the control module 4 that connect successivelyAnd inversion module 5, this frequency converter motor-drive circuit also comprises: open type gate-controlled switch 6, wherein, instituteThe input of stating rectification module 1 is connected with power end, the first end of described rectification module 1 and described soft openingThe first end of dynamic model piece 2 is connected; Of the second end of described soft-start module 2 and described filtration module 3One end is connected; The second end of described rectification module 1 is connected with the second end of described filtration module 3; DescribedControl module 4 is in parallel with described filtration module 3; The first end of described inversion module 5 and described filtering mouldThe first end of piece 3 is connected, the second end phase of the second end of described inversion module 5 and described filtration module 3Connect; The first end of described open type gate-controlled switch 6 is connected with the first end of described filtration module 3, described inThe second end of open type gate-controlled switch 6 is connected with the first end of described inversion module 5; Described inversion module 5The 3rd end be output; The power supply of described power end passes through described rectification module 1 to described filtration module 3Charge, after described filtration module 3 has charged, start the control circuit of described control module 4,Described control module 4 is exported open type gate-controlled switch 6 closures described in control signal control.
This invention adds an open type gate-controlled switch between the filtration module of frequency converter and inversion module,In the time that frequency converter is not thrown electricity, filtration module and inversion module are connected to disconnection, when correct wiring is that RST throwsWhen electricity, power supply charges to filter capacitor module by rectification module, when control circuit starts up itAfter, control module output control signal control open type gate-controlled switch closure, frequency converter can normally be exported;When mistake is while receiving inverter output terminal by power line, throw electricity and cannot form closed-loop path, control section becauseFilter capacitor cannot charge and keep power failure state always, i.e. safe condition, can effectively avoid frequency converterBecause mis-wired causes aircraft bombing, avoid the loss of fault type.
Concrete, as shown in Figure 1, described rectification module comprises: three groups of diode groups in parallel in the same way,Every group is connected in series two diodes, respectively at described diode group extracting power supply cord as described rectification mouldThe input of piece. Rectification module, is also high-frequency switch module, and effect is that alternating current is converted to direct current,It can be divided into three phase rectifier module and two-phase rectification module, and what in the present invention, mention is three phase rectifier module.
Concrete, as shown in Figure 1, described soft-start module comprises: resistance and with described resistance alsoThe open type gate-controlled switch that connection connects. To filter capacitor when electricity is thrown in the Main Function restriction of soft-start moduleCurrent peak, to protect rectification module.
Described filtration module comprises filter capacitor, of the just very described filtration module of described filter capacitorOne end, the second end that negative pole is described filtration module.
The present invention arranges an open type gate-controlled switch between filtration module and inversion module, when wiring justReally time, throw electricity by the RST in Fig. 1, power supply charges to filter capacitor module by rectification module,After control circuit starts up, frequency converter normally starts and controls open type gate-controlled switch K1 closure,Do not affect normal output, concrete, refer to accompanying drawing 2, the disclosed frequency converter motor of the embodiment of the present invention drivesThe corresponding sequential chart of correct wiring of moving circuit, as shown in Figure 2, in the time that power supply throwing electric switch is power-off, filterRipple capacitance voltage is zero, and open type gate-controlled switch is in off-state, and output enable is not exportable, works as electricityWhen electric switch is thrown in source for throwing electricity, filter capacitor charges, after charging completes, then through after a while,Open type gate-controlled switch is in closure state, and output enable is exportable, and frequency converter can normally be exported.
In the time of wiring error, throw electricity by the UVW in Fig. 1, if there is no K1 gate-controlled switch, while throwing electricity,Power supply charges by the diode pair filter capacitor in inversion module, owing to there is no soft start resistance limitStream, the peak point current that therefore charges is larger, can cause inversion module to damage. If inversion module does not damage,Now move frequency converter and also can cause short circuit aircraft bombing, be concatenated into filter capacitor but work as K1 open type gate-controlled switchAnd between inversion module time, because open type gate-controlled switch is in off-state, cannot form closed-loop path,Avoid inversion module to cause damage, allow Frequency Converter Control part in dead electricity safe condition simultaneously, concrete, refer to accompanying drawing 3, be the mis-wired correspondence of the disclosed frequency converter motor-drive circuit of the embodiment of the present inventionSequential chart, no matter power supply is thrown electric switch is still thrown electricity in power-off, because filter capacitor is in electroless state,Open type gate-controlled switch remains open always, and output enable is always not exportable.
This invention adds an open type gate-controlled switch between filtration module and inversion module, at frequency converterWhile not throwing electricity, filtration module and inversion module are connected to disconnection, in the time that correct wiring is RST throwing electricity, and electricityCharging to filter capacitor module by rectification module in source, after control circuit starts up, controlsModule output control signal control open type gate-controlled switch closure, frequency converter can normally be exported; When mistake is by electricityWhen source line is received inverter output terminal, throw electricity and cannot form closed-loop path, control section is because filter capacitorCannot charge and keep power failure state always, i.e. safe condition, can effectively avoid frequency converter because of mis-wiredAnd cause aircraft bombing, avoid the loss of fault type.
On the basis of the disclosed embodiment of the invention described above, the invention also discloses a kind of frequency converter, toolBody comprises frequency converter motor-drive circuit described above, can effectively avoid frequency converter to lead because of mis-wiredCause aircraft bombing, avoid the loss of fault type. Concrete, described frequency converter motor-drive circuit is as shown in Figure 1.
In sum: the invention discloses a kind of frequency converter motor-drive circuit, be applied to frequency converter, itsComprise the rectification module, soft-start module, filtration module, control module and the inversion module that connect successively,This frequency converter motor-drive circuit also comprises: open type gate-controlled switch, this invention is in filtration module and inversionBetween module, add an open type gate-controlled switch, in the time that frequency converter is not thrown electricity, filtration module and inversion mouldPiece is connected to disconnection, when correct wiring is that RST throws when electricity, power supply by rectification module to filtered electrical molarPiece charges, after control circuit starts up, and control module output control signal control open typeGate-controlled switch closure, frequency converter can normally be exported; In the time that inverter output terminal received by power line by mistake, throwElectricity cannot form closed-loop path, and control section keeps power failure state always because filter capacitor cannot charge,Be safe condition, can effectively avoid frequency converter to cause aircraft bombing because of mis-wired, avoid the loss of fault type.The invention also discloses a kind of frequency converter, an open type is set between filtration module and inversion module canControl switch, in the time that wiring is correct, frequency converter normally starts and controls open type gate-controlled switch closure, not shadowRing normal output; In the time of wiring error, because open type gate-controlled switch is in off-state, cannot formClosed-loop path, avoids inversion module to cause damage, allows Frequency Converter Control part in dead electricity safety simultaneouslyState.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field can be realized or useThe present invention. To be aobvious and easy for those skilled in the art to the multiple amendment of these embodimentSee, General Principle as defined herein can be in the situation that not departing from the spirit or scope of the present invention,Realize in other embodiments. Therefore, the present invention will can not be restricted to these embodiment shown in this article,But to meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a frequency converter motor-drive circuit, is applied to frequency converter, and described circuit comprises successively and to connectRectification module, soft-start module, filtration module, control module and inversion module, is characterized in that, alsoComprise: open type gate-controlled switch, wherein,
The input of described rectification module is connected with power end, the first end of described rectification module and described softThe first end that starts module is connected;
The second end of described soft-start module is connected with the first end of described filtration module;
The second end of described rectification module is connected with the second end of described filtration module;
Described control module is in parallel with described filtration module;
The second end of described inversion module is connected with the second end of described filtration module;
The first end of described open type gate-controlled switch is connected with the first end of described filtration module, describedly often opensThe second end of type gate-controlled switch is connected with the first end of described inversion module;
The 3rd end of described inversion module is output;
The power supply of described power end charges to described filtration module by described rectification module, when describedAfter filtration module has charged, start the control circuit of described control module, described control module output controlOpen type gate-controlled switch closure described in signal controlling processed;
In the time that frequency converter is not thrown electricity, filtration module and inversion module are connected to disconnection, when correct wiring is RSTWhile throwing electricity, power supply charges to filter capacitor module by rectification module, when control circuit starts upAfterwards, control module output control signal control open type gate-controlled switch closure, frequency converter can normally be exported;When mistake is while receiving inverter output terminal by power line, throw electricity and cannot form closed-loop path, control section becauseFilter capacitor cannot charge and keep power failure state always.
2. frequency converter motor-drive circuit according to claim 1, is characterized in that, described rectificationModule comprises: three groups of diode groups in parallel in the same way, every group is connected in series two diodes, respectively in instituteState the input of diode group extracting power supply cord as described rectification module.
3. frequency converter motor-drive circuit according to claim 1, is characterized in that, described soft openingDynamic model piece comprises: a resistance and the open type gate-controlled switch being connected in parallel with described resistance.
4. frequency converter motor-drive circuit according to claim 1, is characterized in that, described filteringModule comprises filter capacitor, the first end of the just very described filtration module of described filter capacitor, and negative pole isThe second end of described filtration module.
5. a frequency converter, is characterized in that, comprises in the claims 1-4 described in any oneFrequency converter motor-drive circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410028847.0A CN103715970B (en) | 2014-01-22 | 2014-01-22 | A kind of frequency converter motor-drive circuit and frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410028847.0A CN103715970B (en) | 2014-01-22 | 2014-01-22 | A kind of frequency converter motor-drive circuit and frequency converter |
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| CN103715970A CN103715970A (en) | 2014-04-09 |
| CN103715970B true CN103715970B (en) | 2016-05-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104734530B (en) * | 2013-12-20 | 2018-04-17 | 珠海格力电器股份有限公司 | Frequency converter, variable frequency air conditioner and air conditioning system |
| CN105186845B (en) * | 2015-09-29 | 2018-07-03 | 海信（山东）空调有限公司 | A kind of circuit and method for controlling IPM |
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| CN102280862A (en) * | 2011-08-26 | 2011-12-14 | 广州三晶电气有限公司 | Frequency converter input/output reverse connection detection protection method and device |
| CN203027126U (en) * | 2012-01-09 | 2013-06-26 | 欧司朗股份有限公司 | Protection circuit for preventing output end alternating-current voltage misconnection, and alternating-current/direct-current conversion apparatus |
| CN203675031U (en) * | 2014-01-22 | 2014-06-25 | 浙江禾川科技股份有限公司 | Frequency converter motor drive circuit and frequency converter |
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2014
- 2014-01-22 CN CN201410028847.0A patent/CN103715970B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07322484A (en) * | 1994-05-20 | 1995-12-08 | Toshiba Corp | Power converter |
| CN201838994U (en) * | 2010-06-18 | 2011-05-18 | 北京茨浮电气有限公司 | Input and output reverse protection device of frequency converter |
| CN201717802U (en) * | 2010-07-05 | 2011-01-19 | 常熟开关制造有限公司(原常熟开关厂） | Reverse connection protection inverter circuit |
| CN102280862A (en) * | 2011-08-26 | 2011-12-14 | 广州三晶电气有限公司 | Frequency converter input/output reverse connection detection protection method and device |
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