CN203027151U - Frequency converter - Google Patents
Frequency converter Download PDFInfo
- Publication number
- CN203027151U CN203027151U CN 201220513810 CN201220513810U CN203027151U CN 203027151 U CN203027151 U CN 203027151U CN 201220513810 CN201220513810 CN 201220513810 CN 201220513810 U CN201220513810 U CN 201220513810U CN 203027151 U CN203027151 U CN 203027151U
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- frequency converter
- protective circuit
- protection circuit
- input
- output
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Abstract
The utility model provides a frequency converter (100). The frequency converter comprises a transformer portion (20), a current transformation portion (30) and a control portion (40). The frequency converter is characterized in that the frequency converter further comprises a protection circuit (10). The protection circuit (10) can also comprises an input protection circuit and/or an output protection circuit. The following advantages can be realized through the frequency converter of the utility model: a turnkey solution is adopted, power can be directly inputted to a middle-high voltage frequency converter from an external power grid, the installation is simplified; and at the same time, advantages of high structure integration degree, easy installation and easy debugging can be realized, and the frequency converter is the main development direction of large electrical equipment; an integrated design is adopted, the optimization of the design of electrical systems can be facilitated, and the electrical wiring can be optimized; the solution has advantages of stronger market competition ability and more obvious economic value; and through the protection structure, the field maintenance is more safe and more convenient and fast.
Description
Technical field
The utility model relates to a kind of frequency converter, and more specifically, the utility model relates to a kind of frequency converter with safety protective circuit.
Background technology
In the prior art, the inner not input and output of frequency converter protection.Be mainly do not have a kind of can the fast shut-off high-voltage great-current, have again the device of lower cost.How to prevent that high-voltage large current from being individual very major issue to the impact of frequency converter input.
Therefore in the prior art, the input line voltage saltus step of frequency converter is indefinite, frequent fault, economic loss is large, and be short-circuited at its input, overcurrent, and during electric leakage, incoming power that can't disjunction self; When the output fault of frequency converter, can't safe disconnecting consumers, protection frequency converter and output loading thereof; Frequency converter and load thereof when safeguarding at the scene, also can't provide safe safeguard measure to the attendant, cause tragedy to occur.(whether this is my idea, can not know)
Therefore, the frequency converter of a kind of inside of market demand with protective circuit.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model proposes a kind of frequency converter, comprise transformer portion, current transformation part and control section, described frequency converter further comprises protective circuit.
Preferably, described protective circuit comprises the input circuit breaker.
Another optimal way is that described protective circuit comprises the input grounding switch.
Further, described protective circuit further comprises lightning arrester.
In addition preferably, described protective circuit comprises output contactor.
In another preferred frequency converter, described protective circuit comprises the output earthed switch.
Further, described protective circuit can comprise the output earthed switch.
Again preferably, described protective circuit can also comprise the output earthed switch.
Described protective circuit can comprise output contactor.
Utilize frequency converter of the present utility model, can realize: the integration solution, external electrical network can directly input to medium-high voltage frequency converter, has simplified installation; Simultaneously high in the integrated degree of configuration aspects, be convenient to installment and debugging, be the main development direction of large electric equipment; The design of integration is conducive to optimize design of electrical system, optimizes electric wiring; This solution has more the standby market competitiveness, and economic worth is more obvious; The protection structure make frequency converter and system more stable, on-site maintenance is safer, and is more convenient.
Description of drawings
Hereinafter will also come this reality by reference to the accompanying drawings by the explanation to preferred implementation in clear and definite understandable mode
Be further described with novel above-mentioned characteristic, technical characterictic, advantage and execution mode thereof, wherein:
Fig. 1 is the circuit diagram according to the frequency converter of the utility model preferred embodiment.
Reference numerals list:
100 frequency converters; 10 protective circuits; 11 input protection circuits; 20 transformer portion;
12 output protection circuits; 13 circuit breakers; 14 input grounding switches; 15 lightning arresters;
16 contactors; 17 output earthed switches; 30 current transformation parts; 40 control sections
Embodiment
With reference to shown in Figure 1, mainly comprise according to frequency converter 100 of the present utility model: transformer portion 20, be used for primary side voltage (being the frequency converter input voltage) is transformed to suitable secondary-side voltage, offer and hand over orthogonal (or friendship) conversion fraction 30, and corresponding phase shifting angle is provided; Hand over orthogonal (or friendship) conversion fraction 30, be used for the exchange conversion direct current with input, then DC converting is become the interchange (perhaps directly the exchange conversion of input being become the interchange of convertible frequency) of convertible frequency; With control section 40, for detection of signals such as the input and output voltage of frequency converter 100, electric current, frequencies, and inner temperature signal, and control according to customer demand and hand over orthogonal change (friendship) to change the parameters such as the output current of part 30, voltage, frequency, control the frequency converter operation.Described frequency converter further comprises protective circuit 10, and this protective circuit 10 avoids inputing or outputing the damaged on end evil for the protection of frequency converter 100.
In one embodiment, protective circuit 10 comprises input circuit breaker 13, its role is to close and closes, interrupting short circuit, mistake/undervoltage trip etc.Particularly, the controlled part 40 of described input circuit breaker 13 is controlled, when the faults such as the frequency converter input terminal voltage is too high, too low, leakage current is excessive, short circuit being detected when control section 40, control section 40 issues instructions to circuit breaker 13 and makes its disconnection, thereby frequency converter 100 is in time separated with grid side, avoid infringement.
Further, protective circuit 10 can comprise input grounding switch 14, can be used on frequency converter and rear class equipment and breaks down and need repairing and when safeguarding, ground protection can be provided and energy-storage travelling wave tube is discharged, thereby the attendant is protected.
Further; protective circuit 10 can also comprise lightning arrester 15; it is used for the release thunder and lightning or holds concurrently discharging power system operation overvoltage energy; protection frequency converter 100; avoid instantaneous overvoltage harm; can block afterflow again, the unlikely electrical installation that causes frequency converter 100 and system earth short circuit thereof is to guarantee system's normal power supply.
In another embodiment of the present utility model, protective circuit 10 comprises output contactor 16, and this output contactor 16 is connected with control section 40, is used for the closed and disconnected load.Particularly, when control section 40 detects the loaded work piece abnormal state, issue instructions to output contactor 16 and make its disconnection, thereby frequency converter 100 is separated with load electrical, avoid infringement from load with protection frequency converter 100.
Further; the protective circuit 10 of frequency converter 100 can also comprise output earthed switch 17, and this output earthed switch 17 is connected with control section 40, is used for when the rear class load equipment keeps in repair; ground protection is provided and energy-storage travelling wave tube is discharged, thereby the attendant is protected.
Particularly, in the work of frequency converter 100, hand over orthogonal (friendship) conversion fraction 30 to provide variable frequency control through output protection part 12 to rear class motor load equipment.When the rear class load equipment broke down, this protection part 12 can in time disconnect the Power supply of handing over orthogonal (friendship) conversion fraction 30, avoids the extension of load equipment fault.Wherein, output earthed switch 17 provides ground protection and energy-storage travelling wave tube is discharged when the rear class load equipment keeps in repair, and the attendant is protected.In addition, can also avoid input is carried out power operation, and then avoid the input high tension transmission to the impact of electrical network.
Earthing is mainly ground protection, and when maintenance of equipment, the closed ground switch device provides discharge loop simultaneously for the inner energy-storage travelling wave tube of frequency converter, can prevent again front end misdelivery electricity, provides protection to the attendant.
In a preferred embodiment; protective circuit 10 comprises input protection circuit 11 and output protection circuit 12; wherein this input protection circuit 11 comprises again circuit breaker 13, input grounding switch 14 and lightning arrester 15, and output protection circuit 12 comprises contactor 16, output earthed switch 17.In normal operation, electrical network gives transformer portion 20 power supplies through the input protection circuit 11 of frequency converter 100.Transformer portion 20 hands over orthogonal (friendship) conversion fraction 30 that suitable input is provided to rear class.Control system 40 is handed over orthogonal (friendship) conversion fraction 30 by detecting the signal condition of every part, controlling, and output user's required voltage and frequency are through offering load motor after output protection part 12.When control section 40 detects input or state output terminal when abnormal, in time send instruction cut-off breaker 13 or contactor 16, thereby make frequency converter 100 avoid infringement.
Above by accompanying drawing and preferred implementation, the utility model detail display and explanation have been carried out; yet the utility model is not limited to these execution modes that has disclosed, and other scheme that those skilled in the art therefrom derive out is also within protection range of the present utility model.
Claims (9)
1. a frequency converter (100), comprise transformer portion (20), and current transformation part (30) and control section (40) is characterized in that described frequency converter further comprises protective circuit (10).
2. frequency converter according to claim 1 (100), is characterized in that, described protective circuit (10) comprises input circuit breaker (13).
3. frequency converter according to claim 2 (100), is characterized in that, described protective circuit (10) comprises input grounding switch (14).
4. according to claim 2 or 3 described frequency converters (100), is characterized in that, described protective circuit (10) further comprises lightning arrester (15).
5. according to claim 1,2 or 3 described frequency converters (100), is characterized in that, described protective circuit (10) comprises output contactor (16).
6. according to claim 1,2 or 3 described frequency converters (100), is characterized in that, described protective circuit (10) comprises output earthed switch (17).
7. frequency converter according to claim 3 (100), is characterized in that, described protective circuit (10) comprises output earthed switch (17).
8. frequency converter according to claim 5 (100), is characterized in that, described protective circuit (10) comprises output earthed switch (17).
9. frequency converter according to claim 6 (100), is characterized in that, described protective circuit (10) comprises output contactor (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220513810 CN203027151U (en) | 2012-09-29 | 2012-09-29 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220513810 CN203027151U (en) | 2012-09-29 | 2012-09-29 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203027151U true CN203027151U (en) | 2013-06-26 |
Family
ID=48651095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220513810 Expired - Lifetime CN203027151U (en) | 2012-09-29 | 2012-09-29 | Frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203027151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822239B (en) * | 2022-08-11 | 2023-11-11 | 致茂電子股份有限公司 | Two-way ac power conversion device |
-
2012
- 2012-09-29 CN CN 201220513810 patent/CN203027151U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822239B (en) * | 2022-08-11 | 2023-11-11 | 致茂電子股份有限公司 | Two-way ac power conversion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |
|
| CX01 | Expiry of patent term |