CN201328071Y - Single-phase frequency converter circuit and frequency converter utilizing same - Google Patents
Single-phase frequency converter circuit and frequency converter utilizing same Download PDFInfo
- Publication number
- CN201328071Y CN201328071Y CNU2008202140849U CN200820214084U CN201328071Y CN 201328071 Y CN201328071 Y CN 201328071Y CN U2008202140849 U CNU2008202140849 U CN U2008202140849U CN 200820214084 U CN200820214084 U CN 200820214084U CN 201328071 Y CN201328071 Y CN 201328071Y
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- circuit
- insulated gate
- gate bipolar
- power tube
- photoelectrical coupler
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Abstract
The utility model relates to a single-phase frequency converter circuit, which comprises a driving circuit and three or more isolated gate double-polarity power tubes which are connected with the driving circuit, wherein, the driving circuit comprises a first photo-coupler, a second photo-coupler, a constant voltage power source, an intelligent power module, an upper bridge driving signal circuit and a lower bridge driving signal circuit, wherein, the first photo-coupler is used for separating an upper bridge driving signal, and the second photo-coupler is used for separating a lower bridge driving signal; the isolated gate double-polarity power tube comprises a first and a second groups of isolated gate double-polarity power tubes; the first and the second groups of photo-couplers are respectively connected with the first and the second groups of isolated gate double-polarity power tubes, thus simplifying the structure of the single-phase frequency converter circuit, and reducing the occupied area of the driving circuit on the PCB board; by adopting the above structure, the single-phase frequency converter circuit is convenient to be maintained and can widely substitute the prior intelligent power module, thereby reducing the cost. The frequency converter adopting the circuit structure has the same advantages.
Description
Technical field
The utility model relates to the variable-frequency governor field, relates in particular to a kind of circuit field of using the insulated gate bipolar power tube that is applicable to variable-frequency governor.
The utility model relates to and also relates to a kind of frequency converter.
Background technology
The insulated gate bipolar power tube claims again
IGBT (Insulated Gate BipolarTransistor), by the compound full-control type voltage driven type power electronic device that BJT (double pole triode) and MOS (insulating gate type field effect tube) form, have the advantage of low conduction voltage drop two aspects of the high input impedance of MOSFET and GTR concurrently.The GTR saturation pressure reduces, and current carrying density is big, but drive current is bigger; The MOSFET driving power is very little, and switching speed is fast, but conduction voltage drop is big, and current carrying density is little.IGBT combines the advantage of above two kinds of devices, and the little and saturation pressure of driving power reduces.Be fit to very much to be applied to direct voltage and be fields such as 600V and above converter system such as alternating current machine, frequency converter, Switching Power Supply, lighting circuit, traction transmission.Existing small-power small size frequency converter inverter circuit element adopts the intelligent electric power module more, promptly required insulated gate bipolar power tube of inverter circuit (hereinafter claiming IGBT) and drive circuit is integrated in the so-called intelligent electric power module of formation on the chip
Be called as Chinese utility model patent publication number " CN2682709 " name " middle and high voltage frequency changer IGBT overcurrent treatment circuit " patent disclosure a kind of middle and high voltage frequency changer IGBT overcurrent treatment circuit; the IGBT overcurrent treatment circuit that can repeatedly judge; overcome the mistakenly stop machine phenomenon that above-mentioned the sort of disposable judgement IGBT overcurrent is caused, and the number of times of its judgement can be revised at any time.The utility model is formed and is comprised; drive circuit 1; pulse counter 2; digital comparator 3; overcurrent detects and the general thick film IGBT drive circuit of reset function by having; over-current signal is sent into a counter, and the data that the result of counting and another preset compare, and result relatively goes to control middle and high voltage variable frequency speed regulating system again and whether carries out the hard stop action.
Adopt the intelligent electric power module in the single-phase converter circuit of this kind, its volume is little, and is easy for installation.Circuit design is simple.But because power module mostly is the import element, so procurement cycle is long, the purchase cost height; And this kind intelligent electric power module is integrated in IGBT on the chip, but adopts above-mentioned intelligent electric power modular structure to make troubles for the maintenance in later stage and increase maintenance cost; IGBT can not damage simultaneously generally speaking, is single armed mostly, goes up bridge or following bridge and brake the IGBT damage.Module will be changed whole module as long as an IGBT damages, and cause waste.Also be difficult to buy the module of same model in some small and medium-sized cities, increased cost thus.
The utility model content
The technical problems to be solved in the utility model provides a kind of simple in structure, low single-phase converter circuit of cost.Simultaneously, the utility model also provides a kind of frequency converter that adopts this single-phase converter circuit.
The utility model is achieved through the following technical solutions:
A kind of single-phase converter circuit of the present utility model,
It comprises: the inverter circuit that is used for DC power supply is converted to alternating current, wherein, this inverter circuit comprises: drive circuit and the corresponding insulated gate bipolar power tube more than three or three that is connected with this drive circuit, wherein, drive circuit comprises: first photoelectrical coupler that is used to isolate the bridge drive signal, be used to isolate second photoelectrical coupler of bridge drive signal down, be used to provide the constant voltage source of constant voltage, it is open-minded to be used for control Driver Circuit, the intelligent power model that turn-offs, be connected with described first photoelectrical coupler, be used to drive the last bridge drive signal circuit of this first photoelectrical coupler, be connected with described second photoelectrical coupler, be used to drive the following bridge drive signal circuit of this second photoelectrical coupler; Described insulated gate bipolar power tube comprises, first, second group insulated gate bipolar power tube, described first, second group photoelectrical coupler connect with corresponding first, second group insulated gate bipolar power tube respectively.
Further, described single-phase converter circuit further comprises: described first, second photoelectrical coupler is connected with the grid of described first, second group insulated gate bipolar power tube respectively.
Further, described single-phase converter circuit comprises driving drive circuit three groups of parallel connections, that structure is identical and corresponding three groups of insulated gate bipolar power tubes that are connected with it; Three groups of insulated gate bipolar power tubes are reverse into all controllable alternating current of frequency, voltage to DC power supply.
Further, the constant voltage source in three groups of drive circuits of described single-phase converter circuit is for driving DC power supply, and the last bridging of the output cathode of this driving DC power supply and described drive circuit connects, and the following bridging of its output negative pole and this drive circuit connects.
Further, be in series with resistance on the grid of described insulated gate bipolar power tube; Under normal circumstances the speed of opening of insulated gate bipolar power tube is fast more, and loss is more little, and open fast more, the peak current that the insulated gate bipolar power tube bears is big more, the easy more insulated gate bipolar power tube that causes damages.Therefore by series resistance on the grid of insulated gate bipolar power tube, can reduce the climbing speed of the gate drive voltage of insulated gate bipolar power tube, reduce the peak current that it bears.
Further, be parallel with the circuit that is formed in parallel by resistance and electric capacity between the grid of described insulated gate bipolar power tube and emitter; Employing is parallel with the circuit that is formed by resistance and electric capacity and can prevents that insulated gate bipolar power tube collection emitter-base bandgap grading from asking and be in the high resistant output state between the grid of insulated gate bipolar power tube and emitter, grid capacitance is charged in addition, prevent to cause making the unexpected conducting of insulated gate bipolar power tube.
Further, be parallel with voltage stabilizing circuit on the described driving DC power supply, the grid of insulated gate bipolar power tube is realized the electricity isolation by oxide-film and emitter.Because oxide-film is very thin, the too high grid that can puncture of driving voltage damages the insulated gate bipolar power tube, and is too high in order to prevent driving voltage, and a voltage stabilizing circuit in parallel on driving power makes the voltage can be quietly at security value (s).
A kind of frequency converter, comprise: shell, be arranged on the fin in this shell, hard wiring board and the power panel that is connected with this hard wiring board, this hard wiring board is provided with above-mentioned single-phase converter circuit, this hard wiring board firmly is connected with this power panel with a socket by six connections disposed thereon, is provided with silica gel insulating radiation layer between described fin and hard wiring board; Because therefore the metal substrate of insulated gate bipolar power tube module will stick a slice silica gel insulating radiation layer for the collection utmost point between fin and substrate; Guarantee good insulation performance and heat radiation.
A kind of single-phase converter circuit of the present utility model, adopt drive circuit and the corresponding insulated gate bipolar power tube more than three or three that is connected with this drive circuit, wherein, drive circuit comprises: first photoelectrical coupler that is used to isolate the bridge drive signal, be used to isolate second photoelectrical coupler of bridge drive signal down, be used to provide the constant voltage source of constant voltage, it is open-minded to be used for control Driver Circuit, the intelligent power model that turn-offs, be connected with described first photoelectrical coupler, be used to drive the last bridge drive signal circuit of this first photoelectrical coupler, be connected with described second photoelectrical coupler, be used to drive the following bridge drive signal circuit of this second photoelectrical coupler; Described insulated gate bipolar power tube comprises, first, second group insulated gate bipolar power tube, described first, second group photoelectrical coupler connects with corresponding first, second group insulated gate bipolar power tube respectively, simplified the structure of single-phase converter circuit thus, reduced drive circuit area occupied on pcb board, and, adopt this kind structure to be convenient to safeguard, can substitute existing intelligent electric power module event widely, reduce cost.Adopt the frequency converter of foregoing circuit structure to have above-mentioned advantage equally.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 single-phase converter circuit theory structure schematic diagram of the present utility model;
Embodiment
See also shown in Figure 1, a kind of single-phase converter circuit of the present utility model, it comprises: it comprises: the inverter circuit that is used for DC power supply is converted to alternating current, wherein, this inverter circuit comprises: drive circuit and the corresponding insulated gate bipolar power tube IGBT more than three or three that is connected with this drive circuit, wherein, drive circuit comprises: the first photoelectrical coupler (not shown) that is used to isolate the bridge drive signal, be used to isolate the second photoelectrical coupler (not shown) of bridge drive signal down, be used to provide the constant voltage source (not shown) of constant voltage, it is open-minded to be used for control Driver Circuit, the intelligent power model (not shown) of turn-offing, be connected with described first photoelectrical coupler, be used to drive the last bridge drive signal circuit of this first photoelectrical coupler, be connected with described second photoelectrical coupler, be used to drive the following bridge drive signal circuit of this second photoelectrical coupler; Described insulated gate bipolar power tube IGBT comprises, first, second group insulated gate bipolar power tube IGBT, described first, second group photoelectrical coupler connect with corresponding first, second group insulated gate bipolar power tube IGBT respectively.In the present embodiment, be provided with three insulated gate bipolar power tube IGBT.
In this embodiment, described single-phase converter circuit further comprises: described first, second group photoelectrical coupler is connected with the grid of described first, second group insulated gate bipolar power tube IGBT respectively.
In this embodiment, described single-phase converter circuit comprises driving drive circuit three groups of parallel connections, that structure is identical and corresponding three groups of insulated gate bipolar power tube IGBT that are connected with it; Three groups of insulated gate bipolar power tube IGBT are reverse into all controllable alternating current of frequency, voltage to DC power supply.
In this embodiment, constant voltage source in three groups of drive circuits of described single-phase converter circuit is for driving DC power supply, the last bridging of the output cathode of this driving DC power supply and described drive circuit connects, and the following bridging of its output negative pole and this drive circuit connects.
In this embodiment, be in series with resistance on the grid of described insulated gate bipolar power tube IGBT; Under normal circumstances the speed of opening of insulated gate bipolar power tube IGBT is fast more, and loss is more little, and open fast more, the peak current that insulated gate bipolar power tube IGBT bears is big more, the easy more insulated gate bipolar power tube IGBT that causes damages.Therefore by series resistance on the grid of insulated gate bipolar power tube IGBT, can reduce the climbing speed of the gate drive voltage of insulated gate bipolar power tube IGBT, reduce the peak current that it bears.
In this embodiment, be parallel with the circuit that is formed in parallel by resistance and electric capacity between the grid of described insulated gate bipolar power tube IGBT and emitter; Employing is parallel with the circuit that is formed by resistance and electric capacity and can prevents that insulated gate bipolar power tube IGBT collection emitter-base bandgap grading from asking and be in the high resistant output state between the grid of insulated gate bipolar power tube IGBT and emitter, grid capacitance is charged in addition, prevent to cause making the unexpected conducting of insulated gate bipolar power tube IGBT.
In this embodiment, be parallel with voltage stabilizing circuit on the described driving DC power supply, the grid of insulated gate bipolar power tube IGBT is realized the electricity isolation by oxide-film and emitter.Because oxide-film is very thin, the too high grid that can puncture of driving voltage damages insulated gate bipolar power tube IGBT, and is too high in order to prevent driving voltage, and a voltage stabilizing circuit in parallel on driving power makes the voltage can be quietly at security value (s).
This embodiment also comprises a kind of frequency converter (not shown), comprise: shell, be arranged on the fin in this shell, hard wiring board and the power panel that is connected with this hard wiring board, this hard wiring board is provided with above-mentioned single-phase converter circuit, this hard wiring board firmly is connected with this power panel with a socket by six connections disposed thereon, is provided with silica gel insulating radiation layer between described fin and hard wiring board; Because therefore the metal substrate of insulated gate bipolar power tube module will stick a slice silica gel insulating radiation layer for the collection utmost point between fin and substrate; Guarantee good insulation performance and heat radiation.
The embodiment of the above is a better embodiment of the present utility model, is not to limit concrete practical range of the present utility model with this, and the equivalence that all shapes according to the utility model, structure are done changes all in protection range of the present utility model.
Claims (7)
1. single-phase converter circuit, it comprises: the inverter circuit that is used for DC power supply is converted to alternating current, it is characterized in that, this inverter circuit comprises: drive circuit and the corresponding insulated gate bipolar power tube more than three or three that is connected with this drive circuit, wherein, drive circuit comprises: first photoelectrical coupler that is used to isolate the bridge drive signal, be used to isolate second photoelectrical coupler of bridge drive signal down, be used to provide the constant voltage source of constant voltage, it is open-minded to be used for control Driver Circuit, the intelligent power model that turn-offs, be connected with described first photoelectrical coupler, be used to drive the last bridge drive signal circuit of this first photoelectrical coupler, be connected with described second photoelectrical coupler, be used to drive the following bridge drive signal circuit of this second photoelectrical coupler; Described insulated gate bipolar power tube comprises, first, second group insulated gate bipolar power tube, described first, second group photoelectrical coupler connect with corresponding first, second group insulated gate bipolar power tube respectively.
2. a kind of single-phase converter circuit according to claim 1 is characterized in that: described single-phase converter circuit further comprises: described first, second photoelectrical coupler is connected with the grid of described first, second group insulated gate bipolar power tube respectively.
3. a kind of single-phase converter circuit according to claim 1, it is characterized in that: the constant voltage source in three groups of drive circuits of described single-phase converter circuit is for driving DC power supply, the last bridging of the output cathode of this driving DC power supply and described drive circuit connects, and the following bridging of its output negative pole and this drive circuit connects.
4. a kind of single-phase converter circuit according to claim 1 is characterized in that: be in series with resistance on the grid of described insulated gate bipolar power tube.
5. a kind of single-phase converter circuit according to claim 1 is characterized in that: be parallel with the circuit that is formed in parallel by resistance and electric capacity between the grid of described insulated gate bipolar power tube and emitter.
6. a kind of single-phase converter circuit according to claim 1 is characterized in that: be parallel with voltage stabilizing circuit on the described driving DC power supply, the grid of insulated gate bipolar power tube is realized the electricity isolation by oxide-film and emitter.
7. frequency converter, comprise: shell, be arranged on the fin in this shell, hard wiring board and the power panel that is connected with this hard wiring board, it is characterized in that: this hard wiring board is provided with as any described single-phase converter circuit of claim 1 to 6, this hard wiring board firmly is connected with this power panel with a socket by six connections disposed thereon, is provided with silica gel insulating radiation layer between described fin and hard wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202140849U CN201328071Y (en) | 2008-11-28 | 2008-11-28 | Single-phase frequency converter circuit and frequency converter utilizing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202140849U CN201328071Y (en) | 2008-11-28 | 2008-11-28 | Single-phase frequency converter circuit and frequency converter utilizing same |
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| Publication Number | Publication Date |
|---|---|
| CN201328071Y true CN201328071Y (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202140849U Expired - Fee Related CN201328071Y (en) | 2008-11-28 | 2008-11-28 | Single-phase frequency converter circuit and frequency converter utilizing same |
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| Country | Link |
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| CN (1) | CN201328071Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113191A (en) * | 2013-06-05 | 2014-10-22 | 广东美的制冷设备有限公司 | Intelligent power module |
| CN108777542A (en) * | 2018-08-07 | 2018-11-09 | 浙江永邦电气有限公司 | Compact frequency converter |
-
2008
- 2008-11-28 CN CNU2008202140849U patent/CN201328071Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113191A (en) * | 2013-06-05 | 2014-10-22 | 广东美的制冷设备有限公司 | Intelligent power module |
| CN104113191B (en) * | 2013-06-05 | 2017-06-23 | 广东美的制冷设备有限公司 | A kind of SPM |
| CN108777542A (en) * | 2018-08-07 | 2018-11-09 | 浙江永邦电气有限公司 | Compact frequency converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN EASYDRIVE INVERTER FREQUENCY TECHNOLOGY C Free format text: FORMER NAME: SHENZHEN EASYDRIVE INVERTER TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518001, Guangdong, Shenzhen, Futian District Bagua three optical fiber District 3, 6, 8 Floor East Patentee after: Shenzhen Easydrive Electric Co., Ltd. Address before: 518001, Guangdong, Shenzhen, Futian District Bagua three optical fiber District 3, 6, 8 Floor East Patentee before: Shenzhen Easydrive Inverter Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20141128 |
|
| EXPY | Termination of patent right or utility model |