CN107561439A - A kind of ground detecting method of converter oxygen gun Frequency Converter Control motor - Google Patents
A kind of ground detecting method of converter oxygen gun Frequency Converter Control motor Download PDFInfo
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- CN107561439A CN107561439A CN201710557183.0A CN201710557183A CN107561439A CN 107561439 A CN107561439 A CN 107561439A CN 201710557183 A CN201710557183 A CN 201710557183A CN 107561439 A CN107561439 A CN 107561439A
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- frequency converter
- control motor
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- oxygen gun
- converter
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Abstract
The present invention discloses a kind of ground detecting method of converter oxygen gun Frequency Converter Control motor, and the ground detecting method includes：The speed encoder detects the actual motion speed of the converter oxygen gun Frequency Converter Control motor, and the actual motion speed is sent into the frequency converter；The frequency converter is by the actual motion speed compared with the given speed that the controller is set；Whether the resistance value that the resistance detector detects the winding of the converter oxygen gun Frequency Converter Control motor is less than or equal to 0.5K ohms.By setting speed detector and resistance detector, detect the actual motion speed and resistance value of the converter oxygen gun Frequency Converter Control motor, by judging whether the speed difference of actual motion speed and given speed is more than or equal to 3HZ, and whether the duration more than or equal to 3HZ is more than or equal to 0.5s, or/and whether the resistance value of the resistance detector detection is less than or equal to 0.5K ohms, determine whether the converter oxygen gun Frequency Converter Control motor occurs unidirectionally to be grounded, anti-falling stop rifle accident occurs.
Description
Technical field
The present invention relates to metallurgy industry steelmaking converter technology field, more particularly to a kind of converter oxygen gun Frequency Converter Control
The ground detecting method of motor.
Background technology
Oxygen lance for steel-making converter control system controls for AFE SIEMENS S7-200s, belongs to three-phase ungrounded power systems.When oxygen rifle is transported
During row, when the phase winding of oxygen rifle motor one is grounded, motor line voltage is constant, and electric current also without significantly raised change, causes
Frequency converter can not differentiate that single-phase earthing occurs for oxygen rifle machine winding, and now, oxygen rifle can continue to run with, no matter simply now operate
Instruction carries rifle or drop rifle, and oxygen rifle actual act is all drop rifle operation, therefore, easily causes Zhui Qiang accident potential, can also make
Into motor two-phase even three-phase windings scaling loss.
The content of the invention
The application provides a kind of ground detecting method of converter oxygen gun Frequency Converter Control motor, solve in the prior art without
Method judges whether oxygen rifle machine winding occurs unidirectionally to be grounded, and causes oxygen rifle to continue to run with, and so as to cause Zhui Qiang accident potential, causes
Motor the two-phase even technical problem of three-phase windings scaling loss.
The application provides a kind of ground detecting method of converter oxygen gun Frequency Converter Control motor, and the ground detecting method should
For in a ground detecting system,
The ground detecting system includes：Controller, frequency converter, speed encoder, resistance detector, the velocity encoded cine
Device and the converter oxygen gun Frequency Converter Control motor connection, the frequency converter are connected with controller and the speed encoder, institute
Resistance detector is stated to be connected with the converter oxygen gun Frequency Converter Control motor and the frequency converter；
The ground detecting method includes：
The speed encoder detects the actual motion speed of the converter oxygen gun Frequency Converter Control motor, and by the reality
The border speed of service is sent to the frequency converter；
The actual motion speed compared with the given speed that the controller is set, is judged the speed by the frequency converter
Whether degree difference is more than or equal to 3HZ；
Whether the resistance value that the resistance detector detects the winding of the converter oxygen gun Frequency Converter Control motor is less than etc.
In 0.5K ohms；
It is more than or equal to 3HZ in the speed difference, and the duration is more than or equal to 0.5s, or/and the resistance value is less than
During equal to 0.5K ohms, determine that unidirectional ground connection occurs for the converter oxygen gun Frequency Converter Control motor.
Preferably, it is determined that after the unidirectional ground connection of converter oxygen gun Frequency Converter Control motor generation, methods described also includes：
Generate an alarm signal.
Preferably, it is determined that after the unidirectional ground connection of converter oxygen gun Frequency Converter Control motor generation, methods described also includes：
Generate a prompt message.
Preferably, it is determined that after the unidirectional ground connection of converter oxygen gun Frequency Converter Control motor generation, methods described also includes：
The control of generation one converter oxygen gun Frequency Converter Control motor signal out of service.
Preferably, whether the resistance value of the winding of the resistance detector detection converter oxygen gun Frequency Converter Control motor
The actual motion speed of the converter oxygen gun Frequency Converter Control motor is detected in the speed encoder less than or equal to 0.5K ohms
Perform before, or the actual motion speed of the converter oxygen gun Frequency Converter Control motor is detected simultaneously with the speed encoder
Perform.
Preferably, whether the resistance value of the winding of the resistance detector detection converter oxygen gun Frequency Converter Control motor
Less than or equal to 0.5K ohms the frequency converter by the actual motion speed compared with the given speed that the controller is set
Perform before, or with the frequency converter by the actual motion speed compared with the given speed that the controller is set simultaneously
Perform.
The application has the beneficial effect that：
The application detects the converter oxygen gun Frequency Converter Control motor by setting speed detector and resistance detector
Actual motion speed and resistance value, by judging whether the speed difference of actual motion speed and given speed is more than or equal to 3HZ,
And whether the duration more than or equal to 3HZ is more than or equal to 0.5s, or/and whether the resistance value that the resistance detector detects is small
In equal to 0.5K ohms, determine whether the converter oxygen gun Frequency Converter Control motor occurs unidirectionally to be grounded, anti-falling stop rifle accident hair
Raw, solving can not judge whether oxygen rifle machine winding occurs unidirectionally to be grounded in the prior art, cause oxygen rifle to continue to run with, so as to
Cause Zhui Qiang accident potential, cause motor the two-phase even technical problem of three-phase windings scaling loss.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment.
Fig. 1 is a kind of knot of the ground detecting system of converter oxygen gun Frequency Converter Control motor of the better embodiment of the application one
Structure schematic diagram；
Fig. 2 is the ground detecting system application method flow chart of the converter oxygen gun Frequency Converter Control motor in Fig. 1.
Embodiment
The embodiment of the present application solves existing by providing a kind of ground detecting method of converter oxygen gun Frequency Converter Control motor
Having can not judge whether oxygen rifle machine winding occurs unidirectionally to be grounded in technology, cause oxygen rifle to continue to run with, so as to cause to fall rifle thing
Therefore hidden danger, cause motor the two-phase even technical problem of three-phase windings scaling loss.
Technical scheme in the embodiment of the present application is above-mentioned technical problem, and general thought is as follows：
The application detects the converter oxygen gun Frequency Converter Control motor by setting speed detector and resistance detector
Actual motion speed and resistance value, by judging whether the speed difference of actual motion speed and given speed is more than or equal to 3HZ,
And whether the duration more than or equal to 3HZ is more than or equal to 0.5s, or/and whether the resistance value that the resistance detector detects is small
In equal to 0.5K ohms, determine whether the converter oxygen gun Frequency Converter Control motor occurs unidirectionally to be grounded, anti-falling stop rifle accident hair
Raw, solving can not judge whether oxygen rifle machine winding occurs unidirectionally to be grounded in the prior art, cause oxygen rifle to continue to run with, so as to
Cause Zhui Qiang accident potential, cause motor the two-phase even technical problem of three-phase windings scaling loss.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
In order to solve can not to judge whether oxygen rifle machine winding occurs unidirectionally to be grounded in the prior art, oxygen rifle is caused to continue to transport
OK, so as to cause Zhui Qiang accident potential, motor the two-phase even technical problem of three-phase windings scaling loss are caused, the application provides a kind of
The ground detecting method of converter oxygen gun Frequency Converter Control motor.The ground detecting method is applied in a ground detecting system.
As shown in figure 1, it is a kind of structural representation of the ground detecting system of converter oxygen gun Frequency Converter Control motor.It is described
Oxygen rifle control system is the control of AFE SIEMENS S7-200s, and Rated motor voltage is 690V, wye connection, three-phase ungrounded power systems.
The ground detecting system includes：Controller 10, frequency converter 20, speed encoder 30, resistance detector 40.
The controller 10 is used to set given speed.The speed encoder 30 and the converter oxygen gun Frequency Converter Control
Motor 50 connects, for detecting the actual motion speed of the converter oxygen gun Frequency Converter Control motor 50.
The frequency converter 20 is connected with controller 10 and the speed encoder 30, receive the controller 10 to constant speed
The actual motion speed of degree and the converter oxygen gun Frequency Converter Control motor 50 of the speed encoder 30 detection.The frequency conversion
The given speed and the actual motion speed are compared by device 20, are determined whether to generate alarm signal according to comparative result
Number.
The resistance detector 40 is connected with motor 50, for detecting the resistance of the winding of motor 50.When resistance detector 40
When detecting that the resistance of the winding of motor 50 is less than preset value, resistance detector 40 produces alarm signal, and is sent to frequency converter 20.
Specifically, it is provided with breaker between the resistance detector 20 and the frequency converter 20.
As shown in Fig. 2 the ground detecting method comprises the following steps：
Step 110, the speed encoder 30 detects the actual motion speed of the converter oxygen gun Frequency Converter Control motor 50
Degree, and the actual motion speed is sent to the frequency converter 20；
Step 120, the given speed ratio that the frequency converter 20 sets the actual motion speed and the controller 10
Compared with judging whether the speed difference is more than or equal to 3HZ；Duration refers to that frequency converter 20 is detecting given speed and reality
Speed difference between the speed of service is more than or equal to after 3HZ, it is necessary to after continuing the regular hour, and frequency converter 20 produces alarm.
Step 130, the resistance detector 40 detects the resistance of the winding of the converter oxygen gun Frequency Converter Control motor 50
Whether value is less than or equal to 0.5K ohms；
Wherein, step 130 can perform before step 110, can also be performed simultaneously with step 110, step 120.
Step 140, it is more than or equal to 3HZ in the speed difference, and the duration is more than or equal to 0.5s, or/and the electricity
Resistance is less than or equal to 0.5K ohms, determines that the converter oxygen gun Frequency Converter Control motor 50 occurs unidirectionally to be grounded, at this point it is possible to raw
Into an audible ringing signal or prompt message, the control converter oxygen gun Frequency Converter Control motor can also be generated and stop fortune
Capable signal.
That is, it is more than or equal to 3HZ in the speed difference, and the duration is more than or equal to 0.5s, or the resistance value is
It is no to be less than or equal to 0.5K ohms, determine that the converter oxygen gun Frequency Converter Control motor 50 has occurred unidirectionally to be grounded；Or the speed
Degree difference is more than or equal to 3HZ, and the duration is more than or equal to 0.5s, and whether the resistance value is less than or equal to 0.5K ohms, really
The fixed converter oxygen gun Frequency Converter Control motor 50 has occurred unidirectionally to be grounded.
Such as：When oxygen rifle provides lifting order, given speed is the velocity encoded cine of positive speed, under normal circumstances motor institute band
Device is fed back with given the same, i.e., given and feedback speed difference is almost 0.But the phase winding of motor one be grounded when, lifting oxygen rifle to
The given speed of upper operation is positive speed, and actual oxygen rifle is that (reason is after the phase of machine winding one is grounded, although electric for downward operation
Machine line voltage is constant, but output torque greatly reduces, and can not carry oxygen rifle, less than oxygen rifle self gravitation, so oxygen rifle is at it
Under deadweight, operation downwards), now given speed (positive speed) subtracts actual coding device feedback speed (operation downwards is negative speed
Degree), difference is more than speed fiducial value 3HZ soon.
When oxygen rifle provides decline order, given speed is negative velocity, under normal circumstances the speed encoder of motor institute band
Feedback is with given the same, i.e., given and feedback speed fiducial value is almost 0.But the phase winding of motor one be grounded when, lifting oxygen rifle to
The given speed of lower operation is negative velocity, and actual oxygen rifle is still downward operation, but the speed run downwards accelerates that (reason is
According to the principle of power, when motor output torque is equal with oxygen rifle deadweight, oxygen rifle travels at the uniform speed, and after the phase of machine winding one ground connection,
Although motor line voltage is constant, output torque greatly reduces, less than oxygen rifle self gravitation, so oxygen rifle is under its own weight,
Accelerate operation downwards), now given speed (negative velocity) subtracts actual coding device feedback speed (operation is negative velocity downwards), poor
Value is likely larger than 3HZ, it is also possible between 0-3HZ, then just needs to use resistance detection mode, the resistance value now detected
Less than the alarming value of setting.
Either oxygen rifle provides lifting order or declines order, and resistance detection alarming value all may specific rate manner of comparison
It is in most cases that speed manner of comparison is fast when hurry up, but lifting order, and during decline order, resistance detection mode is fast.
The application detects the converter oxygen gun Frequency Converter Control motor 50 by setting speed detector and resistance detector
Actual motion speed and resistance value, by judging whether the speed difference of actual motion speed and given speed is more than or equal to
3HZ, and the duration more than or equal to 3HZ whether be more than or equal to 0.5s, or/and the resistance value that the resistance detector detects is
It is no to be less than or equal to 0.5K ohms, determine whether the converter oxygen gun Frequency Converter Control motor 50 occurs unidirectionally to be grounded, anti-falling stop rifle
Accident occurs, and solving can not judge whether oxygen rifle machine winding occurs unidirectionally to be grounded in the prior art, cause oxygen rifle to continue to transport
OK, so as to cause Zhui Qiang accident potential, motor the two-phase even technical problem of three-phase windings scaling loss are caused.
It is as follows that specific installation performs step：
Step S1：AFE inverter inverter cabinets install resistance detector, it is separately installed control this equipment breaker, from
Lead-out wire gives frequency converter On-off signal to CUVC plates on its output switch amount point.
Step S2：Resistance detector power supply is connected, the alarming value of resistance detector is set, the output of selecting switch amount is set
Point.
Step S3：Converter parameter is changed, and the switching value point of resistance detector, is set into parameter.
Step S4：Motor speed encoder is installed, motor encoder velocity feedback is to frequency converter.
Step S5：To PLC given speeds compared with feedback speed, setting speed deviation and lag time.
Step S6：Two kinds of signals carry out or operation, provide alarm F150.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
1. a kind of ground detecting method of converter oxygen gun Frequency Converter Control motor, it is characterised in that the ground detecting method should
For in a ground detecting system,
The ground detecting system includes：Controller, frequency converter, speed encoder, resistance detector, the speed encoder with
The converter oxygen gun Frequency Converter Control motor connection, the frequency converter are connected with controller and the speed encoder, the electricity
Resistance detector is connected with the converter oxygen gun Frequency Converter Control motor and the frequency converter；
The ground detecting method includes：
The speed encoder detects the actual motion speed of the converter oxygen gun Frequency Converter Control motor, and the reality is transported
Scanning frequency degree is sent to the frequency converter；
The actual motion speed compared with the given speed that the controller is set, is judged the speed difference by the frequency converter
Whether value is more than or equal to 3HZ；
Whether the resistance value that the resistance detector detects the winding of the converter oxygen gun Frequency Converter Control motor is less than or equal to
0.5K ohms；
It is more than or equal to 3HZ in the speed difference, and the duration is more than or equal to 0.5s, or/and the resistance value is less than or equal to
During 0.5K ohms, determine that unidirectional ground connection occurs for the converter oxygen gun Frequency Converter Control motor.
2. ground detecting method as claimed in claim 1, it is characterised in that it is determined that converter oxygen gun Frequency Converter Control motor is sent out
After raw unidirectional ground connection, methods described also includes：
Generate an alarm signal.
3. ground detecting method as claimed in claim 1, it is characterised in that it is determined that converter oxygen gun Frequency Converter Control motor is sent out
After raw unidirectional ground connection, methods described also includes：
Generate a prompt message.
4. ground detecting method as claimed in claim 1, it is characterised in that it is determined that converter oxygen gun Frequency Converter Control motor is sent out
After raw unidirectional ground connection, methods described also includes：
The control of generation one converter oxygen gun Frequency Converter Control motor signal out of service.
5. ground detecting method as claimed in claim 1, it is characterised in that the resistance detector detects the converter oxygen gun
Whether the resistance value of the winding of Frequency Converter Control motor is less than or equal to 0.5K ohms is detected the converter in the speed encoder
Performed before the actual motion speed of oxygen rifle Frequency Converter Control motor, or the converter oxygen gun is detected with the speed encoder
The actual motion speed of Frequency Converter Control motor performs simultaneously.
6. ground detecting method as claimed in claim 1, it is characterised in that the resistance detector detects the converter oxygen gun
It is in the frequency converter that the actual motion is fast whether the resistance value of the winding of Frequency Converter Control motor is less than or equal to 0.5K ohms
Degree with the controller setting given speed relatively before perform, or with the frequency converter by the actual motion speed with
The given speed of the controller setting relatively performs simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557183.0A CN107561439B (en) | 2017-07-10 | 2017-07-10 | A kind of ground detecting method of converter oxygen gun Frequency Converter Control motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557183.0A CN107561439B (en) | 2017-07-10 | 2017-07-10 | A kind of ground detecting method of converter oxygen gun Frequency Converter Control motor |
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| Publication Number | Publication Date |
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| CN107561439A true CN107561439A (en) | 2018-01-09 |
| CN107561439B CN107561439B (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710557183.0A Active CN107561439B (en) | 2017-07-10 | 2017-07-10 | A kind of ground detecting method of converter oxygen gun Frequency Converter Control motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153289A (en) * | 2018-01-15 | 2018-06-12 | 宁波精成车业有限公司 | Driver performs the test method and circuit of mechanical action lag time difference |
| CN110684879A (en) * | 2019-10-29 | 2020-01-14 | 首钢京唐钢铁联合有限责任公司 | Method and device for preventing oxygen lance from falling |
| CN112322829A (en) * | 2020-10-12 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting grounding of motor winding of oxygen lance of steel converter |
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| JP2012135171A (en) * | 2010-12-24 | 2012-07-12 | Toyota Motor Corp | Rotary electric machine drive system |
| CN103194571A (en) * | 2013-04-11 | 2013-07-10 | 莱芜钢铁集团有限公司 | Automatic calibration device for converter oxygen lance encoder |
| CN103589821A (en) * | 2013-11-29 | 2014-02-19 | 北京金自天正智能控制股份有限公司 | Automatic control method for lifting and dropping of oxygen gun of steel-making converter |
| CN105907918A (en) * | 2016-07-05 | 2016-08-31 | 中冶赛迪电气技术有限公司 | Control system and method for improving operation safety of converter oxygen lance |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012135171A (en) * | 2010-12-24 | 2012-07-12 | Toyota Motor Corp | Rotary electric machine drive system |
| CN103194571A (en) * | 2013-04-11 | 2013-07-10 | 莱芜钢铁集团有限公司 | Automatic calibration device for converter oxygen lance encoder |
| CN103589821A (en) * | 2013-11-29 | 2014-02-19 | 北京金自天正智能控制股份有限公司 | Automatic control method for lifting and dropping of oxygen gun of steel-making converter |
| CN105907918A (en) * | 2016-07-05 | 2016-08-31 | 中冶赛迪电气技术有限公司 | Control system and method for improving operation safety of converter oxygen lance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153289A (en) * | 2018-01-15 | 2018-06-12 | 宁波精成车业有限公司 | Driver performs the test method and circuit of mechanical action lag time difference |
| CN110684879A (en) * | 2019-10-29 | 2020-01-14 | 首钢京唐钢铁联合有限责任公司 | Method and device for preventing oxygen lance from falling |
| CN112322829A (en) * | 2020-10-12 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting grounding of motor winding of oxygen lance of steel converter |
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| Publication number | Publication date |
|---|---|
| CN107561439B (en) | 2019-12-03 |
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