CN111786610A - Monitoring method of frequency converter and control device thereof - Google Patents
Monitoring method of frequency converter and control device thereof Download PDFInfo
- Publication number
- CN111786610A CN111786610A CN202010649178.4A CN202010649178A CN111786610A CN 111786610 A CN111786610 A CN 111786610A CN 202010649178 A CN202010649178 A CN 202010649178A CN 111786610 A CN111786610 A CN 111786610A
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- Prior art keywords
- frequency converter
- motor
- frequency
- output
- current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to a monitoring method of a frequency converter, wherein the frequency converter is used for controlling at least one motor to operate, and the monitoring method is characterized in that: after the frequency converter is connected with the motor, controlling the output frequency of the frequency converter to be matched with the output frequency of the motor; during operation, the output frequency of the frequency converter and the output frequency of the motor are detected, whether the output frequency of the frequency converter is consistent with the output frequency of the motor or not is judged, whether the voltage or the current of the frequency converter is matched with the voltage or the current of the motor or not is judged, meanwhile, whether the initial voltage or the current of the rectifying circuit and the output voltage or the current of the rectifying circuit are matched with the output voltage or the current of the motor or not is judged during operation, and when the initial voltage or the current of the rectifying circuit is not matched with the output voltage or the current of the motor or not, the output frequency of the frequency converter, the output frequency of the. The method can monitor the main part of the frequency converter during operation, know the actual working value in the working state and adjust the frequency converter according to different working values.
Description
Technical Field
The invention relates to the field of frequency converters, in particular to a monitoring method of a frequency converter and a control device thereof.
Background
A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronic technology to control an ac motor by changing the frequency of a working power supply of the motor.
The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detection unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
In practical applications, the frequency converter changes the frequency and the voltage according to actual requirements, and meanwhile, when the frequency and the voltage change, the actual voltage value and the frequency value of each part need to be monitored, so that the frequency converter needs to be monitored.
Disclosure of Invention
In view of the above, the present invention provides a method for controlling a frequency converter, so as to solve the above problems.
In order to achieve the above object, the present invention provides a monitoring method for a frequency converter for controlling at least one motor to operate, comprising: after the frequency converter is connected with the motor, controlling the output frequency of the frequency converter to be matched with the output frequency of the motor; during operation, the output frequency of the frequency converter and the output frequency of the motor are detected, whether the output frequency of the frequency converter is consistent with the output frequency of the motor or not is judged, whether the voltage or the current of the frequency converter is matched with the voltage or the current of the motor or not is judged, meanwhile, whether the initial voltage or the current of the rectifying circuit and the output voltage or the current of the rectifying circuit are matched with the output voltage or the current of the motor or not is judged during operation, and when the initial voltage or the current of the rectifying circuit is not matched with the output voltage or the current of the motor or not, the output frequency of the frequency converter, the output frequency of the.
The invention also provides a control device based on the monitoring method of the frequency converter, which comprises the following steps: comprises an input module, a storage module, a control module, a detection module and a judgment module, wherein the detection module comprises a first detection module, a second detection module, a third detection module and a fourth detection module, the first detection module is used for detecting the output frequency of the frequency converter, the second detection module is used for detecting the output frequency of the motor, the third detection module is used for detecting the initial voltage or current of the rectifying circuit, the fourth detection module is used for detecting the input voltage or current of the rectifying circuit, the input module is used for inputting the parameters of the frequency converter and the motor and the input and output conditions of the rectifying circuit, the storage module is used for storing the parameters of the frequency converter and the motor and the input and output data of the rectifying circuit, the judging module is used for judging whether the data in the storage module is matched with the data detected by each detecting module, and the control module is used for controlling the frequency converter.
By the method, the main part of the frequency converter can be monitored during operation, the actual working value in the working state can be known, and the frequency converter can be adjusted according to different working values.
Description of the drawings:
FIG. 1 is a schematic diagram of a control device according to the present invention.
Reference numerals: 100. an input module; 200. a control module; 300. a detection module; 400. a judgment module; 500. a storage module; 301. a first detection module; 302. a second detection module; 303. a third detection module; 304. and a fourth detection module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a monitoring method of a frequency converter, wherein the frequency converter is used for controlling at least one motor to run, and after the frequency converter is connected with the motor, the output frequency of the frequency converter is controlled to be matched with the output frequency of the motor; during operation, the output frequency of the frequency converter and the output frequency of the motor are detected, whether the output frequency of the frequency converter is consistent with the output frequency of the motor or not is judged, whether the voltage or the current of the frequency converter is matched with the voltage or the current of the motor or not is judged, meanwhile, whether the initial voltage or the current of the rectifying circuit and the input voltage or the current of the rectifying circuit are matched with the output voltage or the current of the motor or not is judged during operation, and when the initial voltage or the current of the rectifying circuit is not matched with the output voltage or the current of the motor or not, the output frequency of the frequency converter, the output frequency of the.
The invention also provides a control device of the monitoring method based on the frequency converter, which comprises the following steps: as shown in fig. 1, the device comprises an input module 100, a storage module 500, a control module 200, a detection module 300 and a judgment module 400, wherein the detection module comprises a first detection module 301, a second detection module 302, a third detection module 303 and a fourth detection module 304, the first detection module 301 is used for detecting the output frequency of the frequency converter, the second detection module 302 is used for detecting the output frequency of the motor, the third detection module 303 is used for detecting the initial voltage or current of the rectification circuit, the fourth detection module 304 is used for detecting the output voltage or current of the rectification circuit, the input module 100 is used for inputting the parameters of the frequency converter and the motor and the input and output conditions of the rectification circuit, the storage module 500 is used for storing the parameters of the frequency converter and the motor and the input and output data of the rectification circuit, the judgment module 400 is used for judging whether the data in the storage module 500 is matched with the data detected by each detection module, the control module 200 is used for controlling the frequency converter. By the method, the main part of the frequency converter can be monitored during operation, the actual working value in the working state can be known, and the frequency converter can be adjusted according to different working values.
In actual operation, firstly, the frequency converter is connected with the motor, at the moment, the frequency converter inputs frequency according to the condition of the motor, at the moment, each detection module detects the output frequency of the frequency converter, the output frequency of the motor, the initial voltage and current of the rectifying circuit, and the current or voltage rectified by the rectifying circuit at any time, the judgment is carried out, the stability of the whole frequency and voltage is kept through the control module 200, and when the detection module detects that data changes, the control module 200 adjusts, and parameters are kept in the initial state or the state needing to be changed.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A method of monitoring a frequency converter for controlling operation of at least one electric machine, the method comprising: after the frequency converter is connected with the motor, controlling the output frequency of the frequency converter to be matched with the output frequency of the motor; during operation, the output frequency of the frequency converter and the output frequency of the motor are detected, whether the output frequency of the frequency converter is consistent with the output frequency of the motor or not is judged, whether the voltage or the current of the frequency converter is matched with the voltage or the current of the motor or not is judged, meanwhile, whether the initial voltage or the current of the rectifying circuit and the output voltage or the current of the rectifying circuit are matched with the output voltage or the current of the motor or not is judged during operation, and when the initial voltage or the current of the rectifying circuit is not matched with the output voltage or the current of the motor or not, the output frequency of the frequency converter, the output frequency of the.
2. The frequency converter control device adopted by the monitoring method of the frequency converter according to claim 1, characterized in that: comprises an input module, a storage module, a control module, a detection module and a judgment module, wherein the detection module comprises a first detection module, a second detection module, a third detection module and a fourth detection module, the first detection module is used for detecting the output frequency of the frequency converter, the second detection module is used for detecting the output frequency of the motor, the third detection module is used for detecting the initial voltage or current of the rectifying circuit, the fourth detection module is used for detecting the input voltage or current of the rectifying circuit, the input module is used for inputting the parameters of the frequency converter and the motor and the input and output conditions of the rectifying circuit, the storage module is used for storing the parameters of the frequency converter and the motor and the input and output data of the rectifying circuit, the judging module is used for judging whether the data in the storage module is matched with the data detected by each detecting module, and the control module is used for controlling the frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010649178.4A CN111786610A (en) | 2020-07-08 | 2020-07-08 | Monitoring method of frequency converter and control device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010649178.4A CN111786610A (en) | 2020-07-08 | 2020-07-08 | Monitoring method of frequency converter and control device thereof |
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| CN111786610A true CN111786610A (en) | 2020-10-16 |
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| CN202010649178.4A Pending CN111786610A (en) | 2020-07-08 | 2020-07-08 | Monitoring method of frequency converter and control device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200206A (en) * | 2021-12-07 | 2022-03-18 | 嘉兴丹那赫电子科技有限公司 | Frequency converter convenient to monitor and monitoring method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956563Y (en) * | 2006-09-29 | 2007-10-03 | 纪胜春 | High-voltage AC winding motor rotor variable frequency speed-regulating control system |
| CN109660179A (en) * | 2018-12-29 | 2019-04-19 | 西安西驰电气股份有限公司 | A kind of fast starting method of frequency converter inspection |
| CN110224660A (en) * | 2019-07-01 | 2019-09-10 | 重庆科川电气有限公司 | A kind of frequency converter control method |
| CN110365278A (en) * | 2019-08-20 | 2019-10-22 | 东北大学 | A kind of output control method and system of pump variable frequency device |
-
2020
- 2020-07-08 CN CN202010649178.4A patent/CN111786610A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956563Y (en) * | 2006-09-29 | 2007-10-03 | 纪胜春 | High-voltage AC winding motor rotor variable frequency speed-regulating control system |
| CN109660179A (en) * | 2018-12-29 | 2019-04-19 | 西安西驰电气股份有限公司 | A kind of fast starting method of frequency converter inspection |
| CN110224660A (en) * | 2019-07-01 | 2019-09-10 | 重庆科川电气有限公司 | A kind of frequency converter control method |
| CN110365278A (en) * | 2019-08-20 | 2019-10-22 | 东北大学 | A kind of output control method and system of pump variable frequency device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200206A (en) * | 2021-12-07 | 2022-03-18 | 嘉兴丹那赫电子科技有限公司 | Frequency converter convenient to monitor and monitoring method thereof |
| CN114200206B (en) * | 2021-12-07 | 2023-02-10 | 嘉兴丹那赫电子科技有限公司 | Frequency converter convenient to monitor and monitoring method thereof |
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Application publication date: 20201016 |