CN107317538A - A kind of method of Frequency Converter Control motor work - Google Patents
A kind of method of Frequency Converter Control motor work Download PDFInfo
- Publication number
- CN107317538A CN107317538A CN201710463181.5A CN201710463181A CN107317538A CN 107317538 A CN107317538 A CN 107317538A CN 201710463181 A CN201710463181 A CN 201710463181A CN 107317538 A CN107317538 A CN 107317538A
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- China
- Prior art keywords
- frequency converter
- encoder
- mode
- change
- over switch
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of method of Frequency Converter Control motor work, comprise the following steps：（1）The opened loop control mode of operation of encoderless is preset in frequency converter and has the closed-loop control mode of operation of encoder；（2）Change-over switch and power supply are set outside frequency converter, power supply is connected with change-over switch one end, the mode of operation control end of the change-over switch other end and frequency converter is connected, and encoder and motor connection, encoder are connected with frequency converter, frequency converter and motor connection；（3）During encoder normal work, change-over switch disconnects power supply, and now mode of operation control end obtains low frequency signal, and frequency converter is to there is the work of the closed-loop control mode of operation controlled motor of encoder；During encoder fault, change-over switch is switched on power, now mode of operation control end obtains high-frequency signal, now frequency converter can be worked with the opened loop control mode of operation controlled motor of encoderless.The present invention have no matter encoder whether failure, frequency converter can effectively controlled motor work advantage.
Description
Technical field
The present invention relates to blast furnace ironmaking equipment technical field, and in particular to a kind of method of Frequency Converter Control motor work.
Background technology
In blast furnace ironmaking process, blast furnace elevator feeding device is one of visual plant of blast furnace ironmaking, and main function is
The various raw materials needed for ironmaking are transported into blast furnace roof from the ore deposit groove on ground to feed to blast furnace, to ensure the normal of blast furnace ironmaking
Need.Frequency converter is the important component in blast furnace elevator feeding device, is mainly used in control elevator motor work.Current frequency converter
The single close-loop control mode for having encoder is used the mode of controlled motor work more, this Frequency Converter Control motor work
Mode has the following disadvantages：When encoder breaks down, frequency converter will be stopped and uncontrollable motor works, and then
Blast furnace elevator feeding device is caused not run normally, so that the normal smelting of blast furnace is have impact on, influence product quality and yield.
The content of the invention
It is an object of the invention to provide it is a kind of no matter encoder whether failure, frequency converter effectively controlled motor can work
Method.
To achieve the above object, present invention employs following technical scheme：A kind of described Frequency Converter Control motor work
Method, comprise the following steps：
（1）Two kinds of mode of operations are first preset in frequency converter, a kind of is the opened loop control mode of operation of encoderless, another to be
There is the closed-loop control mode of operation of encoder；
（2）Then change-over switch and power supply are set in the outside of frequency converter, and one end of power supply and one end of change-over switch is electric
Connection, the other end of change-over switch is electrically connected by signal cable with the mode of operation control end of frequency converter, and will coding
The input of device is electrically connected with the output end of motor, and the output end of encoder is electrically connected with the input of frequency converter, by frequency conversion
The output end of device is electrically connected with the input of motor；
（3）When encoder normal work, change-over switch disconnects power supply, and now the mode of operation control end of frequency converter can be obtained
One low frequency signal, now frequency converter can be come with the closed-loop control mode of operation for having encoder controlled motor work；Work as encoder
During failure, change-over switch is switched on power, now the mode of operation control end of frequency converter can obtain a high-frequency signal, this time-varying
Frequency device can carry out controlled motor work with the opened loop control mode of operation of encoderless.
Further, the method for foregoing a kind of Frequency Converter Control motor work, wherein：Change-over switch is single knife switch.
By the implementation of above-mentioned technical proposal, the beneficial effects of the invention are as follows：When encoder breaks down, frequency converter energy
The opened loop control mode of operation of encoderless is rapidly converted to by the closed-loop control mode of operation for having encoder, frequency converter is begun
Motor is control effectively eventually, the operation stability of blast furnace elevator feeding device is improved, it is ensured that the normal smelting of blast furnace,
And then improve production efficiency and product quality.
Brief description of the drawings
Fig. 1 is a kind of operation principle schematic diagram of the method for Frequency Converter Control motor work of the present invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the method that a kind of described Frequency Converter Control motor works comprises the following steps：
（1）Two kinds of mode of operations are first preset in frequency converter 1, a kind of is the opened loop control mode of operation 2 of encoderless, another
It is the closed-loop control mode of operation 3 for having encoder；
（2）Then change-over switch 4 and power supply 5 be set in the outside of frequency converter 1, and by the one of one end of power supply 5 and change-over switch 4
End electrical connection, the other end of change-over switch 4 is electrically connected by signal cable with the mode of operation control end 6 of frequency converter 1, and
The output end of the input of encoder 7 and motor 8 is electrically connected, by the input electricity of the output end of encoder 7 and frequency converter 1
Connection, the output end of frequency converter 1 is electrically connected with the input of motor 8；
（3）When 7 normal work of encoder, change-over switch 4 disconnects power supply 5, now the mode of operation control end 6 of frequency converter 1
A low frequency signal can be obtained, the now meeting of frequency converter 1 carry out controlled motor 8 with the closed-loop control mode of operation 3 for having encoder and work；
When 7 failure of encoder, change-over switch 4 is switched on power 5, now the mode of operation control end 6 of frequency converter 1 can obtain one high
Frequency signal, the now meeting of frequency converter 1 carry out controlled motor 8 with the opened loop control mode of operation 2 of encoderless and work.
It is an advantage of the invention that：When encoder breaks down, frequency converter can be by there is the closed-loop control Working mould of encoder
Formula is rapidly converted to the opened loop control mode of operation of encoderless, frequency converter is control effectively all the time to motor, improves
The operation stability of blast furnace elevator feeding device, it is ensured that the normal smelting of blast furnace, and then improve production efficiency and product
Quality.
Claims (2)
1. a kind of method of Frequency Converter Control motor work, it is characterised in that comprise the following steps：
（1）Two kinds of mode of operations are first preset in frequency converter, a kind of is the opened loop control mode of operation of encoderless, another to be
There is the closed-loop control mode of operation of encoder；
（2）Then change-over switch and power supply are set in the outside of frequency converter, and one end of power supply and one end of change-over switch is electric
Connection, the other end of change-over switch is electrically connected by signal cable with the mode of operation control end of frequency converter, and will coding
The input of device is electrically connected with the output end of motor, and the output end of encoder is electrically connected with the input of frequency converter, by frequency conversion
The output end of device is electrically connected with the input of motor；
（3）When encoder normal work, change-over switch disconnects power supply, and now the mode of operation control end of frequency converter can be obtained
One low frequency signal, now frequency converter can be come with the closed-loop control mode of operation for having encoder controlled motor work；Work as encoder
During failure, change-over switch is switched on power, now the mode of operation control end of frequency converter can obtain a high-frequency signal, this time-varying
Frequency device can carry out controlled motor work with the opened loop control mode of operation of encoderless.
2. a kind of method of Frequency Converter Control motor work according to claim 1, it is characterised in that：Change-over switch is single
Knife-like switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463181.5A CN107317538A (en) | 2017-06-19 | 2017-06-19 | A kind of method of Frequency Converter Control motor work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463181.5A CN107317538A (en) | 2017-06-19 | 2017-06-19 | A kind of method of Frequency Converter Control motor work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107317538A true CN107317538A (en) | 2017-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710463181.5A Pending CN107317538A (en) | 2017-06-19 | 2017-06-19 | A kind of method of Frequency Converter Control motor work |
Country Status (1)
| Country | Link |
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| CN (1) | CN107317538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981077A (en) * | 2018-07-16 | 2018-12-11 | 珠海格力电器股份有限公司 | Abnormal fault tolerance control method and device and air conditioner |
Citations (4)
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|---|---|---|---|---|
| JP4721801B2 (en) * | 2005-07-27 | 2011-07-13 | 東芝三菱電機産業システム株式会社 | Control device for synchronous motor |
| CN203191861U (en) * | 2013-04-12 | 2013-09-11 | 山东天鹅棉业机械股份有限公司 | Frequency automatic setting system of delinter seed feeding mechanism |
| CN103496638A (en) * | 2013-09-26 | 2014-01-08 | 苏州汇川技术有限公司 | Lifting protection system and lifting method for hoisting equipment |
| CN104310148A (en) * | 2014-09-24 | 2015-01-28 | 深圳市正弦电气股份有限公司 | Rescue method and rescue device for elevator |
-
2017
- 2017-06-19 CN CN201710463181.5A patent/CN107317538A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4721801B2 (en) * | 2005-07-27 | 2011-07-13 | 東芝三菱電機産業システム株式会社 | Control device for synchronous motor |
| CN203191861U (en) * | 2013-04-12 | 2013-09-11 | 山东天鹅棉业机械股份有限公司 | Frequency automatic setting system of delinter seed feeding mechanism |
| CN103496638A (en) * | 2013-09-26 | 2014-01-08 | 苏州汇川技术有限公司 | Lifting protection system and lifting method for hoisting equipment |
| CN104310148A (en) * | 2014-09-24 | 2015-01-28 | 深圳市正弦电气股份有限公司 | Rescue method and rescue device for elevator |
Non-Patent Citations (2)
| Title |
|---|
| 张燕宾: "变频调速应用技术(八) 第四讲 设计电路控变频(下)", 《变频器世界》 * |
| 张燕宾: "变频调速问答(十二) 变频器的PID控制(下)", 《电气时代》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981077A (en) * | 2018-07-16 | 2018-12-11 | 珠海格力电器股份有限公司 | Abnormal fault tolerance control method and device and air conditioner |
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Application publication date: 20171103 |