CN201830012U - Automatic bypass device of frequency converter - Google Patents
Automatic bypass device of frequency converter Download PDFInfo
- Publication number
- CN201830012U CN201830012U CN2010205335475U CN201020533547U CN201830012U CN 201830012 U CN201830012 U CN 201830012U CN 2010205335475 U CN2010205335475 U CN 2010205335475U CN 201020533547 U CN201020533547 U CN 201020533547U CN 201830012 U CN201830012 U CN 201830012U
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- frequency
- frequency converter
- inner looping
- power
- pass device
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Abstract
The utility model relates to an electric power conversion system, in particular to an automatic bypass device of a frequency converter, which aims at providing the automatic bypass device of the frequency converter capable of being automatically switched to an industrial frequency power supply when fault occurs. The utility model has the technical scheme that the automatic bypass device is arranged at the frequency converter part, the industrial frequency power supply is connected to the frequency converter, and the frequency converter is connected with loads such as a motor and the like through a frequency conversion passage. In addition, the motor is also connected with the industrial frequency power supply through an industrial frequency passage. A programmable relay for detecting the fault of the frequency converter is arranged on the frequency converter and controls the opening and closing of the frequency conversion passage and the industrial frequency passage. A normally open contact of the programmable relay is connected with a fault detection relay of a loop arranged in the automatic bypass device of the frequency converter, and the fault detection relay drives a normally closed frequency conversion passage contact arranged on the frequency conversion passage and a normally open industrial frequency passage contact arranged on the industrial frequency passage. The technical scheme is characterized in that the motor can be switched to the industrial frequency power supply when the frequency converter fails, and adverse results caused by sudden machine halt are avoided.
Description
Technical field
The utility model relates to a kind of power conversion system, is a kind of frequency converter auto by pass device specifically.
Background technology
The effect of frequency converter is frequency and the amplitude that changes power frequency supply, and then changes the cycle of its moving magnetic field, thereby reaches the purpose of level and smooth control motor speed, and frequency converter is divided into four parts usually: rectification unit, high power capacity electric capacity, inverter and controller.Wherein: the rectification unit power frequency supply that operating frequency is fixing is converted to direct current; Electric energy after the conversion of high power capacity capacitance stores; Inverter is formed electronic switch by the high-power switching transistor array, direct current is changed into the square wave of different frequency, width, amplitude; Controller is by the program work of setting, and the amplitude and the pulsewidth of control output square wave make the alternating current that is superposed to the near sinusoidal ripple, drive alternating current motor.
Entered since 21 century, along with frequency converter drive motor The Application of Technology and universal, domestic variable-frequency control technique has obtained develop rapidly, has been widely used in the industry-by-industry of national economy, promoted to save energy and reduce the cost, improved China's industrial electric transmission level greatly.But along with the popularization and the application of frequency converter, a series of problems that note and solve are just following: after frequency converter broke down, the power supply of motor promptly was cut off, and brought very important negative effect for operating work.
The utility model content
The technical problems to be solved in the utility model is: a kind of frequency converter auto by pass device that can automatically switch to power frequency supply when fault is provided.
The purpose of this utility model can reach by following measure: this device is located at the frequency converter place, and power frequency supply is connected to frequency converter, and frequency converter is connected with the motor even load by the frequency conversion path; Motor also is connected with power frequency supply by the power frequency path in addition.Described frequency converter is provided with the programming relay that detects frequency converter failure, and described programming relay is controlled the switching of described frequency conversion path and power frequency path.The programming relay normally open contact is connected with the fault detection relay of described frequency converter auto by pass device inner looping, and fault detection relay drives the power frequency via-contacts of often opening on frequency conversion via-contacts normally closed on the described frequency conversion path and the power frequency path.
In the operate as normal, described motor obtains the power supply of described inverter converts by described frequency conversion path, when described frequency converter breaks down, described programming relay normally open contact closure, and then described fault detection relay work, and then drive described power frequency path closure, drive described frequency conversion path simultaneously and disconnect, motor switched to power frequency supply by frequency converter auto by pass device and was connected this moment, did not quit work.
The characteristics of technique scheme are: can when frequency converter breaks down motor be switched to power frequency supply, the adverse consequences of having avoided unexpected shutdown to bring.
Further: the normally opened contact of described programming relay and one of described fault detection relay often open that to detect the contact in parallel.When fault detection relay was worked, the described detection closing of contact of often opening had guaranteed the continuous firing of fault detection relay, and the frequent sudden strain of a muscle of the relay of avoiding programming is touched to described motor and brought harmful effect.
Further: be parallel with inner looping frequency conversion section and inner looping power frequency section in the described frequency converter auto by pass device inner looping, it is respectively equipped with frequency conversion contactor and power frequency contactor, and the frequency conversion contactor drives the normally opened contact of described frequency conversion path and the normally closed inner looping power frequency interlocking contact on the described inner looping power frequency section; The power frequency contactor drives the normally opened contact of described power frequency path and the normally closed inner looping frequency conversion interlocking contact on the described inner looping frequency conversion section.Described fault detection relay drives inner looping frequency conversion contact normally closed on the described inner looping frequency conversion section; Described fault detection relay also drives the inner looping power frequency contact that described inner looping power frequency Duan Shangchang opens.
When described power frequency contactor was connected, described inner looping frequency conversion interlocking contact disconnected, simultaneously described power frequency via-contacts closure; When described frequency conversion contactor was connected, described inner looping power frequency interlocking contact disconnected, simultaneously described frequency conversion via-contacts closure.This feature avoids motor to connect with power frequency loop and frequency conversion loop simultaneously in operation process, has stopped the possibility that power frequency loop and frequency conversion loop are short-circuited.
Further: described frequency converter auto by pass device is introduced operating current by transformer from power frequency supply.
Further: on the total loop of described frequency converter auto by pass device, be provided with diverter switch.This feature can switch to power frequency supply with motor according to artificial needs.
Further: described fault detection relay, frequency conversion contactor and power frequency contactor are parallel with indicator light respectively.This feature is of value to the operating state of understanding frequency converter auto by pass device at any time.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Accompanying drawing 1 is the way circuit schematic diagram of the utility model embodiment;
Accompanying drawing 2 is the local circuit schematic diagram of frequency converter auto by pass device among the utility model embodiment.
Embodiment
Known concrete structure and characteristic are no longer set forth at this in this programme.Fig. 1 is the way circuit schematic diagram of the utility model embodiment: the incoming end of frequency converter 101 is connected with power frequency civil power 103 by frequency converter main switch 102, frequency converter 101 is connected with motor 105 by the frequency conversion via-contacts group 32 in the frequency converter auto by pass device 104, and motor 105 is connected with power frequency civil power 103 by the power frequency via-contacts group 42 in the frequency converter auto by pass device 104 in addition.The programming relay 10 of judging whether frequency converter 101 breaks down is installed on the frequency converter 101, and its driving is located at the programming relay switch 11 of frequency converter auto by pass device 104 Nei Changkai.
Fig. 2 is the home loop schematic diagram of frequency converter auto by pass device 104, and power frequency civil power 103 provides inner looping electric current from transformer 106 for frequency converter auto by pass device 104 by septulum.
Above-mentioned fault detection relay 20, frequency conversion contactor 30, power frequency contactor 40 are parallel with indicator light 50 respectively.
Above-described only is preferred implementation of the present utility model; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from the utility model structure; can also make some distortion and improvement; these also should be considered as protection range of the present utility model, and these can not influence effect and practical applicability that the utility model is implemented.
Claims (7)
1. frequency converter auto by pass device, it is located at the frequency converter place, described frequency converter couples together load and power supply by the frequency conversion path, described load also is connected with power supply by the power frequency path, described frequency converter auto by pass device comprises the programming relay that detects frequency converter failure, and described programming relay switches the switching of described frequency conversion path and power frequency path.
2. frequency converter auto by pass device according to claim 1, it is characterized in that: the normally opened contact that described programming relay drives is connected with the fault detection relay that described frequency converter auto by pass device inner looping is provided with, and fault detection relay drives the power frequency via-contacts of often opening on frequency conversion via-contacts normally closed on the frequency conversion path and the power frequency path.
3. frequency converter auto by pass device according to claim 1 and 2 is characterized in that: the normally opened contact of described programming relay and one of described fault detection relay often open that to detect the contact in parallel.
4. frequency converter auto by pass device according to claim 3, it is characterized in that: be parallel with inner looping frequency conversion section and inner looping power frequency section in the described frequency converter auto by pass device inner looping, it is respectively equipped with frequency conversion contactor and power frequency contactor, and the frequency conversion contactor drives the normally closed inner looping power frequency interlocking contact on described frequency conversion via-contacts and the described inner looping power frequency section; The power frequency contactor drives the normally closed inner looping frequency conversion interlocking contact on described power frequency via-contacts and the described inner looping frequency conversion section, and described fault detection relay drives inner looping frequency conversion contact normally closed on the described inner looping frequency conversion section; Described fault detection relay also drives the inner looping power frequency contact that described inner looping power frequency Duan Shangchang opens.
5. frequency converter auto by pass device according to claim 4 is characterized in that: described frequency converter auto by pass device is introduced operating current by transformer from power frequency supply.
6. frequency converter auto by pass device according to claim 5 is characterized in that: the inner looping of described frequency converter auto by pass device is provided with total diverter switch.
7. frequency converter auto by pass device according to claim 6 is characterized in that: described fault detection relay, frequency conversion contactor and power frequency contactor are parallel with indicator light respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205335475U CN201830012U (en) | 2010-09-17 | 2010-09-17 | Automatic bypass device of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205335475U CN201830012U (en) | 2010-09-17 | 2010-09-17 | Automatic bypass device of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830012U true CN201830012U (en) | 2011-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205335475U Expired - Fee Related CN201830012U (en) | 2010-09-17 | 2010-09-17 | Automatic bypass device of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830012U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255601A (en) * | 2011-07-18 | 2011-11-23 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN103605282A (en) * | 2012-06-20 | 2014-02-26 | 费希尔控制国际公司 | Method and system for minor loop feedback fallback |
| CN107749661A (en) * | 2017-11-06 | 2018-03-02 | 浙江升航电子科技有限公司 | A kind of intelligent frequency-conversion charging system |
| CN117060684A (en) * | 2023-10-11 | 2023-11-14 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
-
2010
- 2010-09-17 CN CN2010205335475U patent/CN201830012U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255601A (en) * | 2011-07-18 | 2011-11-23 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN102255601B (en) * | 2011-07-18 | 2013-09-25 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN103605282A (en) * | 2012-06-20 | 2014-02-26 | 费希尔控制国际公司 | Method and system for minor loop feedback fallback |
| CN107749661A (en) * | 2017-11-06 | 2018-03-02 | 浙江升航电子科技有限公司 | A kind of intelligent frequency-conversion charging system |
| CN117060684A (en) * | 2023-10-11 | 2023-11-14 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
| CN117060684B (en) * | 2023-10-11 | 2024-01-05 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20170917 |