CN203243230U - High-voltage rotor frequency converter preventing chopper from being damaged during inversion overturn process - Google Patents
High-voltage rotor frequency converter preventing chopper from being damaged during inversion overturn process Download PDFInfo
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- CN203243230U CN203243230U CN 201320181227 CN201320181227U CN203243230U CN 203243230 U CN203243230 U CN 203243230U CN 201320181227 CN201320181227 CN 201320181227 CN 201320181227 U CN201320181227 U CN 201320181227U CN 203243230 U CN203243230 U CN 203243230U
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- frequency converter
- chopper
- rotor frequency
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Abstract
The utility model relates the technical field of high-voltage motor speed regulation and specifically relates to a high-voltage rotor frequency converter preventing a chopper from being damaged during an inversion overturn process. The high-voltage rotor frequency converter preventing the chopper from being damaged during the inversion overturn process is characterized in that the high-voltage rotor frequency converter preventing the chopper from being damaged during the inversion overturn process includes a rectifier bridge unit 10, an IGBT (Insulated Gate Bipolar Transistor) unit 30, a capacitor 50, a protection diode 70 and a thyristor unit 80. A first reactor unit 20 is connected between a positive electrode of the rectifier bridge unit 10 and a grid electrode of the IGBT unit 30 in series. A check diode 40 is connected between the grid electrode of the IGBT unit 30 and a capacitor 50 in series. A second reactor unit 60 is connected with the capacitor 50 and a negative electrode of the protection diode 70. Damages of an integrated diode in an IGBT are prevented through protecting the IGBT. By installing the protection diode externally on a basis of a prior rotor frequency converter, the effective protection of the IGBT is realized. The size and inner component layout of a prior device are not changed generally. And the high-voltage rotor frequency converter preventing the chopper from being damaged during the inversion overturn process is simple and reliable in structure, low in manufacturing cost and easy to realize.
Description
Technical field
The utility model relates to high-voltage motor speed adjusting technique field, is specifically related to the high pressure rotor frequency converter in a kind of high voltage converter.
Background technology
The high pressure rotor frequency converter is domestic technology, adopts the circuit form of rotor top-cross orthogonal, is a kind of with the low voltage control high pressure, the speed adjusting technique take control high-voltage motor slip power as basic principle.
High pressure rotor frequency converter in the market is all take boost chopper (Boost) as basic prototype; the main circuit chopper adopts 1200 volts to 5000 volts IGBT modules of import mostly; this IGBT inside modules is the integrated protection diode all, the copped wave IGBT inside that also has a kind of special use integrated check diode also except the integrated protection diode.Mostly the damage of chopper is owing to hand over the inversion of orthogonal circuit to overturn to cause in the frequency converter running, and mostly is protection diode or check diode breakdown, is that the IGBT inside modules is integrated owing to puncture part, can only change whole module.The complete dependence on import of high pressure IGBT module of the prior art, price is higher, and the relative conventional device of the test of IGBT is cumbersome, and usually the user can't be by oneself for this type of fault, so that the user reduces in the degree of recognition to the high pressure rotor frequency converter.
Summary of the invention
The purpose of this utility model prevents the high pressure rotor frequency converter that chopper damages when being to avoid the defective of prior art to provide a kind of inversion to overturn, thereby effectively solves the defective that exists in the prior art.
For achieving the above object; the technical scheme that the utility model is taked is: described a kind of inversion prevents the high pressure rotor frequency converter that chopper damages when overturning; be characterized in comprising the rectifier bridge unit; insulated gate bipolar transistor (IGBT) unit; capacitor; protection diode and thyristor unit; the first reactor unit serial connection is arranged between rectifier bridge unit positive pole and insulated gate bipolar transistor (IGBT) cell gate; check diode serial connection is arranged between insulated gate bipolar transistor (IGBT) cell gate and the capacitor, and the second reactor unit serial connection is arranged between capacitor and the protection diode cathode.
Described rectifier bridge unit cathode output end is connected and is connected to the check diode anode behind the first reactor unit, and the check diode cathode is connected and is connected to the thyristor unit cathodes behind the second reactor.
The gate input of described insulated gate bipolar transistor (IGBT) unit connects the anode of check diode; One end of described capacitor connects the negative electrode of check diode; The negative electrode of described protection diode is connected to the thyristor unit cathodes.
Anode and the thyristor unit positive pole of the emitter-base bandgap grading output of described rectifier bridge unit negative pole, insulated gate bipolar transistor (IGBT) unit, the other end of capacitor, protection diode interconnect.
The beneficial effects of the utility model are: described a kind of inversion prevents the high pressure rotor frequency converter that chopper damages when overturning, and it is by adopting the method to the IGBT protection to prevent that the inner integrated diode of 1GBT from damaging.Install the protection diode additional on original rotor-side variable frequency device basis to reach the effective protection to IGBT, it does not change equipment original volume and internal components layout substantially, and is simple and reliable for structure, cheap, realizes easily.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model circuit control principle schematic diagram.
Among the figure: 10. rectifier bridge unit; 20. the first reactor unit; 30. insulated gate bipolar transistor unit; 40. check diode; 50. capacitor; 60. the second reactor unit; 70. protection diode; 80. thyristor unit.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
As shown in Figure 1; described a kind of inversion prevents the high pressure rotor frequency converter that chopper damages when overturning; be characterized in comprising rectifier bridge unit 10; insulated gate bipolar transistor (IGBT) unit 30; capacitor 50; protection diode 70 and thyristor unit 80; the first reactor unit 20 serial connections are arranged between rectifier bridge unit 10 positive poles and insulated gate bipolar transistor (IGBT) unit 30 grids; check diode 40 serial connections are arranged between insulated gate bipolar transistor (IGBT) unit 30 grids and the capacitor 50, and the second reactor unit 60 serial connections are arranged between capacitor 50 and protection diode 70 negative electrodes.
Further, described rectifier bridge unit 10 cathode output ends are connected and are connected to check diode 40 anodes behind the first reactor unit 20, and check diode 40 negative electrodes are connected and are connected to thyristor unit 80 negative electrodes behind the second reactor 60.
Further, the gate input of described insulated gate bipolar transistor (IGBT) unit 30 connects the anode of check diode 40; One end of described capacitor 50 connects the negative electrode of check diode 40; The negative electrode of described protection diode 70 is connected to thyristor unit 80 negative electrodes.
Further, anode and thyristor unit 80 positive poles of the other end of the emitter-base bandgap grading output of described rectifier bridge unit negative pole 10, insulated gate bipolar transistor (IGBT) unit 30, capacitor 50, protection diode 70 interconnect.
Described a kind of inversion prevents the high pressure rotor frequency converter that chopper damages when overturning; if when inversion is overturned, do not protect diode 70; electric current can form the loop by protection diode, check diode 40, second reactor 60 of 30 inside, IGBT unit; and then damage IGBT module; add protection diode 70 after-currents and directly form the loop through overprotection diode 70, thereby avoid damaging IGBT.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. prevent the high pressure rotor frequency converter that chopper damages when an inversion is overturned; it is characterized in that comprising the rectifier bridge unit; insulated gate bipolar transistor (IGBT) unit; capacitor; protection diode and thyristor unit; the first reactor unit serial connection is arranged between rectifier bridge unit positive pole and insulated gate bipolar transistor (IGBT) cell gate; check diode serial connection is arranged between insulated gate bipolar transistor (IGBT) cell gate and the capacitor, and the second reactor unit serial connection is arranged between capacitor and the protection diode cathode.
2. prevent the high pressure rotor frequency converter that chopper damages when a kind of inversion as claimed in claim 1 is overturned, it is characterized in that: described rectifier bridge unit cathode output end is connected and is connected to the check diode anode behind the first reactor unit, and the check diode cathode is connected and is connected to the thyristor unit cathodes behind the second reactor.
3. prevent the high pressure rotor frequency converter that chopper damages when a kind of inversion as claimed in claim 1 is overturned, it is characterized in that: the gate input of described insulated gate bipolar transistor (IGBT) unit connects the anode of check diode; One end of described capacitor connects the negative electrode of check diode; The negative electrode of described protection diode is connected to the thyristor unit cathodes.
4. prevent the high pressure rotor frequency converter that chopper damages when overturning such as claim 1 or 2 or 3 described a kind of inversions, it is characterized in that: anode and the thyristor unit positive pole of the emitter-base bandgap grading output of described rectifier bridge unit negative pole, insulated gate bipolar transistor (IGBT) unit, the other end of capacitor, protection diode interconnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181227 CN203243230U (en) | 2013-04-12 | 2013-04-12 | High-voltage rotor frequency converter preventing chopper from being damaged during inversion overturn process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181227 CN203243230U (en) | 2013-04-12 | 2013-04-12 | High-voltage rotor frequency converter preventing chopper from being damaged during inversion overturn process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243230U true CN203243230U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320181227 Expired - Fee Related CN203243230U (en) | 2013-04-12 | 2013-04-12 | High-voltage rotor frequency converter preventing chopper from being damaged during inversion overturn process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243230U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973127A (en) * | 2014-05-20 | 2014-08-06 | 保定优科电气科技有限责任公司 | High-voltage rotor frequency converter with single wave chopping tube |
| CN105553380A (en) * | 2016-02-19 | 2016-05-04 | 尤江峰 | Speed regulation device for rotor side of high-voltage winding motor |
-
2013
- 2013-04-12 CN CN 201320181227 patent/CN203243230U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973127A (en) * | 2014-05-20 | 2014-08-06 | 保定优科电气科技有限责任公司 | High-voltage rotor frequency converter with single wave chopping tube |
| CN105553380A (en) * | 2016-02-19 | 2016-05-04 | 尤江峰 | Speed regulation device for rotor side of high-voltage winding motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20180412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |