CN116393753A - Transmission system of cold shearing equipment - Google Patents
Transmission system of cold shearing equipment Download PDFInfo
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- CN116393753A CN116393753A CN202310327514.7A CN202310327514A CN116393753A CN 116393753 A CN116393753 A CN 116393753A CN 202310327514 A CN202310327514 A CN 202310327514A CN 116393753 A CN116393753 A CN 116393753A
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- 238000010008 shearing Methods 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 25
- 230000003993 interaction Effects 0.000 claims description 12
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 230000033228 biological regulation Effects 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 239000007858 starting material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
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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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- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The application is applicable to the technical field of metallurgical cold shearing equipment and provides a transmission system of the cold shearing equipment. The system comprises: the control module, the variable frequency drive, the first contactor and the second contactor, when the motor is in a normal working state, the first contactor is in a closed state, the second contactor is in an open state, and the motor is in a power frequency mode. The control module keeps consistent with the frequency and the phase of the power grid voltage by adjusting the voltage output by the variable frequency driver, controls the first contactor to be opened and the second contactor to be closed, so that the motor is switched to a variable frequency mode from a power frequency mode, and the variable frequency driver adjusts the output voltage according to the preset shutdown time length to control the motor to be shutdown in a deceleration mode so as to finish braking. According to the quick braking device, quick braking of the cold shearing machine is realized, the parking waiting time of the cold shearing machine is reduced, the overhaul time of cold shearing equipment is prolonged, and the equipment failure rate is reduced.
Description
Technical Field
The application relates to the technical field of metallurgical cold shearing equipment, in particular to a transmission system of the cold shearing equipment.
Background
In industrial production, a cold shear is a device that cuts and crop the rolled piece coming down from a cold bed, the operation of which is directly related to whether the production of the rolled piece is continuous or not.
At present, most cold shears are controlled to start and stop by a soft starter, the soft starter only plays a role of soft start and soft stop, and the soft starter stops freely.
Disclosure of Invention
In view of this, the embodiment of the application provides a transmission system of cold shearing equipment, so as to solve the problem of long parking time of the cold shearing equipment in the prior art.
In order to achieve the above purpose, the present application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a transmission system of a cold shearing apparatus, where the system includes a control module, a variable frequency driver, a first contactor, and a second contactor;
the first end of the variable frequency driver and the first end of the first contactor are used for being connected with a power grid, and the second end of the variable frequency driver is connected with the first end of the second contactor; the second end of the first contactor and the second end of the second contactor are used for being connected with a motor of the cold shearing device;
the control module is respectively connected with the variable frequency driver, the first contactor and the second contactor;
when the motor is in a normal working state, the first contactor is in a closed state, the second contactor is in an open state, and the motor is in a power frequency mode;
when the motor is subjected to braking control, the control module is used for adjusting the frequency and the phase of the voltage output by the variable frequency driver and the power grid voltage to be consistent, controlling the first contactor to be opened, and controlling the second contactor to be closed so as to enable the motor to be switched from a power frequency mode to a variable frequency mode; the variable frequency driver is used for adjusting the output voltage according to the preset shutdown time length, controlling the motor to stop in a speed-reducing mode, and finishing braking.
Based on the first aspect, in some embodiments, the system further comprises a first switch;
the first end of the first switch is used for being connected with a power grid, and the second end of the first switch is respectively connected with the first end of the variable frequency driver and the first end of the first contactor;
when the motor is in a normal working state, the first switch is in a closed state;
and when the motor is braked, the control module is further used for controlling the first switch to be switched from the closed state to the open state after the motor is braked.
Based on the first aspect, in some embodiments, the system further comprises a voltage detection module; the voltage detection module is connected with the control module;
when the motor is subjected to braking control, the voltage detection module is used for detecting the frequency and the phase of the power grid voltage, and the detected frequency and phase of the power grid voltage are sent to the control module; the control module is specifically configured to adjust the frequency and phase of the voltage output by the variable frequency driver to be consistent with the frequency and phase of the grid voltage according to the frequency and phase of the received grid voltage.
Based on the first aspect, in some embodiments, when the motor is in a shutdown state, the first switch, the first contactor, and the second contactor are all in an open state;
when the motor is started and controlled, the control module is used for controlling the first switch and the second contactor to be switched from an open state to a closed state so as to enable the motor to be in a variable frequency mode; the variable frequency driver is used for adjusting the output voltage according to the preset starting time length and controlling the motor to rise;
the voltage detection module is used for detecting the frequency and the phase of the power grid voltage and sending the detected frequency and phase of the power grid voltage to the control module; and the control module is used for controlling the second contactor to be opened and the first contactor to be closed when judging that the frequency and the phase of the voltage output by the variable frequency driver and the power grid voltage are consistent, so that the motor is switched from a variable frequency mode to a power frequency mode.
Based on the first aspect, in some embodiments, during switching of the power frequency mode and the variable frequency mode, a switching current is less than or equal to twice the rated current of the motor.
Based on the first aspect, in some embodiments, the system further comprises a human-machine interaction module;
the man-machine interaction module is connected with the control module and is used for receiving instruction information of a user and sending the instruction information to the control module; the instruction information is used for instructing the control module to control the motor to start, brake or switch modes;
the control module is also used for carrying out corresponding control according to the instruction information.
Based on the first aspect, in some embodiments, the human-machine interaction module further comprises an indication module;
the indication module is used for displaying the running state of the system.
Based on the first aspect, in some embodiments, the system further comprises a power module, a second switch;
the first end of the second switch is used for being connected with the power supply module, and the second end of the second switch is respectively connected with the first end of the variable frequency driver and the first end of the first contactor;
when the power grid is powered off, the control module is used for controlling the first switch to be opened, the second switch to be closed, and the power supply module is used for providing a power frequency power supply required by the system.
Based on the first aspect, in some embodiments, the control module is further configured to control the second switch to open and the first switch to close when the voltage detection module detects the grid voltage.
Based on the first aspect, in some embodiments, the control module is a PLC module.
The invention has the beneficial effects that the invention provides a transmission control system of cold shearing equipment. The system comprises: the control module, the variable frequency drive, the first contactor and the second contactor, when the motor is in a normal working state, the first contactor is in a closed state, the second contactor is in an open state, and the motor is in a power frequency mode. The control module keeps consistent with the frequency and the phase of the power grid voltage by adjusting the voltage output by the variable frequency driver, controls the first contactor to be opened and the second contactor to be closed, so that the motor is switched to a variable frequency mode from a power frequency mode, and the variable frequency driver adjusts the output voltage according to the preset shutdown time length to control the motor to be shutdown in a deceleration mode so as to finish braking. According to the quick braking device, quick braking of the cold shearing machine is realized, the parking waiting time of the cold shearing machine is reduced, the overhaul time of cold shearing equipment is prolonged, and the equipment failure rate is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a transmission system of a cold shear device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a transmission system of a cold shear device according to another embodiment of the present application;
FIG. 3 is a schematic diagram of a transmission system of a cold shear device according to yet another embodiment of the present application;
FIG. 4 is a schematic diagram of a transmission system of a cold shear device according to yet another embodiment of the present application;
FIG. 5 is a schematic diagram of a transmission system of a cold shear device according to yet another embodiment of the present application;
fig. 6 is a schematic diagram of a transmission system of a cold shearing apparatus according to another embodiment of the present application.
Detailed Description
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
The present application will be more clearly described with reference to the following specific examples. The following examples will assist those skilled in the art in further understanding the function of the present application, but are not intended to limit the present application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the spirit of the present application. These are all within the scope of the present application.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the following description will be made with reference to the accompanying drawings by way of specific embodiments.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
Referring to fig. 1, fig. 1 is a schematic diagram of a transmission system of a cold shearing apparatus, and an embodiment of the present application provides a transmission system 10 of a cold shearing apparatus, which may include: a control module 101, a variable frequency drive module 102, a first contactor 103 and a second contactor 104.
The variable frequency drive 102 has a first end connected to the power grid 20 and a second end connected to a first end of the second contactor 104, and a second end of the second contactor 104 is connected to the motor 30 of the cold shear device. The first contactor 103 has a first end connected to the power grid 20 and a second end connected to the motor 30. The control module 101 is connected to the variable frequency drive 102, the first contactor 103 and the second contactor 104.
Optionally, the control module 101 is connected to the variable frequency drive 102 via PROFIBUS-DP (Process Field Bus-Decentralized Peripherals, a computer electronic component).
When the motor 30 is in a normal working state, the first contactor 103 is in a closed state, the second contactor 104 is in an open state, and the motor 30 is in a power frequency mode at the moment.
Alternatively, the control module 101 may be configured to adjust the frequency and phase of the voltage output by the variable frequency driver 102 to be consistent with the voltage of the power grid 20 when the motor 30 is subjected to braking control, and then control the first contactor 103 to be opened and the second contactor 104 to be closed, where the motor 30 is switched from the power frequency mode to the variable frequency mode.
In some embodiments, the control module 101 may be a PLC module or a single chip microcomputer, which is not limited in the embodiments of the present application.
In some embodiments, during the switching of the motor 30 from the power frequency mode to the variable frequency mode, the motor 30 is not stopped, the variable frequency drive 102 outputs a voltage with the rotational speed of the motor 30 at the switching instant, and the switching current during the switching is no more than twice the rated current of the motor 30. The variable frequency driver 102 may be configured to adjust its output voltage according to a preset stop time period after the motor 30 is switched from the power frequency mode to the variable frequency mode, so as to control the motor 30 to stop at a reduced speed, and complete braking.
In some embodiments, the variable frequency driver 102 may implement speed regulation of the motor 30 through control terminals, where the terminal speed regulation may be divided into a voltage signal and a current signal according to different signal types, where the voltage signal is typically 0 to 10 v, the current signal is typically 4 to 20 ma, the selection of the voltage and current signals is performed by parameters, the selection is performed by a jumper of the variable frequency driver, for example, selecting the current signal of 4 to 20 ma, the current input signal of the terminal needs to be connected to the PLC module or the DCS module, when the DCS module or the PLC module outputs 4 to 20 ma, and after the variable frequency driver receives, relevant speed regulation is performed, and when the parameters are set, the speed regulation mode selects the control terminal, and may change the rotation speed corresponding to 4 to 20 ma according to the limitation of the maximum rotation speed and the minimum rotation speed of the variable frequency driver parameter. The variable frequency drive 102 may also implement speed regulation of the motor 30 by means of a panel or 485 communication, and the above embodiment is only for illustration, and is not limited to the speed regulation mode of the variable frequency drive 102.
Alternatively, the preset downtime of the system may be entered by a worker prior to the start-up of the cold shear device, or while the motor 30 is in normal operation.
In some embodiments, referring to fig. 2, fig. 2 is a schematic diagram of a cold shear device drive train, and the cold shear device drive train 10 may further include a first switch 105.
The first switch 105 is connected to the power grid 20 at a first end, and is connected to the first end of the variable frequency drive 102 and the first end of the first contactor 103 at a second end.
When the motor 30 is in a normal operating state, the first switch 105 is in a closed state.
In some embodiments, the control module 101 may also be configured to control the first switch 105 to switch from the closed state to the open state when braking the motor 30.
In some embodiments, referring to fig. 3, fig. 3 is a schematic diagram of a cold shear device drive train, and the cold shear device drive train 10 may further include a voltage detection device 106. Fig. 3 is a schematic diagram of the voltage detection device 106 connected in series with the first contactor 103 according to the embodiment.
The voltage detection device 106 is connected to the control module 101.
In some embodiments, the voltage detection module 106 may be configured to detect the frequency and phase of the grid 20 voltage when braking the motor 30, and send the detected frequency and phase of the grid 20 voltage to the control module 101. The voltage detection device 106 may be connected in series with the first contactor 103, and may detect the frequency and phase of the voltage of the power grid 20 through a wire, or may detect the frequency and phase of the voltage of the power grid 20 through electromagnetic induction or the like without connecting in series with the first contactor 103, which is not limited to the embodiment of the present disclosure.
In some embodiments, the control module 101 may also be configured to adjust the frequency and phase of the voltage output by the variable frequency drive 102 to be consistent with the frequency and phase of the voltage of the power grid 20 when the frequency and phase of the voltage of the power grid 20 is received.
In some embodiments, when the motor 30 is in the shutdown state, the first switch 105, the first contactor 103, and the second contactor 104 are all in the open state. The control module 101 may be further configured to control the first switch 105 and the second contactor 104 to switch from an open state to a closed state when performing start control on the motor 30, so that the motor 30 is in a variable frequency mode. The variable frequency drive 102 may also be configured to adjust its output voltage according to a preset starting duration during variable frequency starting of the motor 30, and control the motor 30 to increase speed.
Optionally, the preset starting time of the system may be input by a worker before the cold shearing device is started.
In some embodiments, the preset speed increasing mode of the variable frequency driver 102 may be a linear mode or a nonlinear mode, where the nonlinear mode includes an "S" mode and a half "S" mode, and the specific speed increasing method adopted by the variable frequency driver 102 is selected according to the actual situation, which is not limited herein.
In some embodiments, the voltage detection device 106 may also be configured to detect the frequency and phase of the voltage of the power grid 20 during the variable frequency start-up of the motor 30 and send the detected frequency and phase of the voltage of the power grid 20 to the control module 101. The control module 101 may be further configured to control the second contactor 104 to be opened and the first contactor 103 to be closed when it is determined that the frequency and the phase of the voltage output by the variable frequency driver 102 and the voltage of the power grid 20 are consistent during the variable frequency starting process of the motor 30, so that the motor 30 is switched from the variable frequency mode to the power frequency mode.
In some embodiments, the voltage detection module 106 may be an HSVN-10 synchronous voltage detection module, refer to fig. 4, fig. 4 is a schematic diagram of a cold-shearing device transmission system with a PLC as a control device provided in this embodiment, where QF is a first switch 105, km1 is a first contactor 103, km2 is a second contactor 104, the HSVN-10 synchronous voltage detection module is a voltage detection module 106, the AC/DC/AC module is a variable frequency driver 102, the AC motor M is a motor 30, and in this embodiment, the voltage of the power grid 20 is 380V, and the current is 500A.
In some embodiments, during the process of switching the motor 30 from the variable frequency mode to the power frequency mode, the motor 30 is not stopped, the switching current is not more than twice the rated current of the motor 30, and the soft start process is realized.
In the prior art, the start-up of the cold shearing device is generally star-delta step-down start-up or soft starter control start-up, and the method can only realize the start-up of the device and cannot control the speed of the start-up of the device. The method and the device not only improve the starting speed, avoid damage of impact current to cold shearing equipment, but also improve the starting speed in the starting process controlled by the soft starter, increase the overhaul time of the cold shearing equipment and reduce the equipment failure rate.
In some embodiments, referring to fig. 5, fig. 5 is a schematic diagram of a cold shear device drive system, and the cold shear device drive system 10 may further include a human-machine interaction module 107.
The man-machine interaction module 107 is connected with the control module 101.
In some embodiments, the human-machine interaction module 107 may be configured to receive instruction information of a user and send the instruction information to the control module 101. The control module 101 may also be configured to perform corresponding control according to instruction information.
Optionally, the instruction information is used to instruct the control module 101 to control the motor 30 to start, brake or switch modes.
In some embodiments, when the first switch 105 and the first contactor 103 are both in the closed state and the second contactor 104 is in the open state, the motor 30 works normally and is in the power frequency mode, at this time, the user issues a parking instruction through the man-machine interaction module 107, the man-machine interaction module 107 sends braking instruction information to the control module 101 according to instruction information of the user, the control module 101 adjusts the voltage output by the variable frequency driver 102 to keep consistent with the frequency and phase of the voltage of the power grid 20, and controls the first contactor 103 to be opened, and the second contactor 104 to be closed, so that the motor 30 is switched from the power frequency mode to the variable frequency mode. The variable frequency drive 102 adjusts the voltage output by itself according to the preset stop time length, controls the motor 30 to stop in a speed-reducing way, and completes braking.
In some embodiments, the human-machine interaction module 107 may include an indication module 1071. The indication module 1071 may be used to display the operational status of the cold shear device drive train 10.
Alternatively, the display module 1071 may be one or more of a liquid crystal display, an LED lamp and a buzzer, which may be selected by a user according to practical situations, but is not limited herein.
In some embodiments, the display module 1071 may be a liquid crystal display with keys for start, stop and mode switching and an LED lamp. When a user presses a start button on the liquid crystal display, the LED lamp is turned on, the control module 101 receives start instruction information, and controls the first switch 105 and the second contactor 104 to switch from an open state to a closed state, so that the motor 30 is in a frequency conversion mode, at this time, the LED lamp is yellow, and the liquid crystal display displays that the motor 30 is in the frequency conversion mode. The variable frequency drive 102 adjusts the voltage output by itself according to the preset starting time to control the speed of the motor 30. The voltage detection device 106 detects the frequency and phase of the grid 20 voltage and sends the detected frequency and phase of the grid 20 voltage to the control module 101. When the control module 101 judges that the frequency and the phase of the voltage output by the variable frequency driver 102 and the voltage of the power grid 20 are consistent, the second contactor 104 is controlled to be opened, the first contactor 103 is controlled to be closed, so that the motor 30 is switched from the variable frequency mode to the power frequency mode, at the moment, the LED lamp is green, and the liquid crystal display screen displays that the motor 30 is in the power frequency mode. The color of the LED lamp and the information displayed on the lcd in this embodiment are only used as examples, which are not limited in this embodiment.
In some embodiments, the display module 1071 may be a liquid crystal display, and displays parameters such as motor speed, current, and internal parameters of the variable frequency drive in real time.
In some embodiments, the display module 1071 may be a buzzer that sounds an alarm when the motor 30 is activated, braked or mode switched.
In some embodiments, referring to fig. 6, fig. 6 is a schematic diagram of a cold shear device drive train, and the cold shear device drive train 10 may further include a power module 108 and a second switch 109. The first end of the second switch 109 is used for being connected to the power module 108, and the second end is connected to the first end of the variable frequency driver 102 and the first end of the first contactor 103, respectively.
Alternatively, the control module 101 may be further configured to control the first switch 105 to be opened and the second switch 109 to be closed when the power grid 20 is disconnected, and the power module 108 may be configured to provide the power frequency required by the system 10.
In some embodiments, when the power grid 20 is powered off, the voltage detection module 106 does not detect the voltage of the power grid 20, and transmits the power-off information of the power grid 20 to the control module 101, and when the control module receives the power-off information of the power grid 20 sent by the voltage detection module 106, the second switch 109 is controlled to be closed, and the power module 108 provides power for the system 10, so that the normal operation of the system is ensured.
In some embodiments, the power module 108 provides power to the system 10 when the motor 10 is in the power frequency mode, ensuring proper operation of the system. When the reserve power supply of the power supply module 108 is insufficient and the power grid 20 is still in the power-off state, the power supply module 108 sends the information of the insufficient power supply to the control module 101, the control module 101 adjusts the frequency and the phase of the voltage output by the variable frequency driver 102 and the voltage of the power grid 20 according to the received information of the insufficient power supply, then the first contactor 103 is controlled to be disconnected, the second contactor 104 is controlled to be closed, at this time, the motor 30 is switched to the variable frequency mode from the power frequency mode, and the variable frequency driver 102 adjusts the output voltage of the motor according to the preset shutdown time length, so that the motor 30 is controlled to be stopped in a speed-reducing mode, and braking is completed.
In some embodiments, the power module 108 provides power to the system 10 to enable the motor 30 to complete the current action when the motor 10 is in variable frequency mode. When the motor 30 is started in a variable frequency mode, the power supply module 108 ensures that the motor 30 can be started normally and is switched from the variable frequency mode to the power frequency mode, and provides power for the motor 30 in the power frequency mode. When the motor 30 is braked in a variable frequency mode, the power supply module 108 ensures that the motor 30 can brake normally.
Optionally, the control module 101 may be further configured to control the second switch 109 to be opened and the first switch 105 to be closed when the voltage detection module 106 detects the voltage of the power grid 20.
In some embodiments, when the reserve power of the power module 108 is sufficient, the voltage detection module 106 detects that the power grid 20 is at a voltage, i.e. the power grid is powered on, the control module 101 controls the second switch 109 to open, the first switch 105 to close, and the power supply module 108 switches to supply power to the power grid 20.
In some embodiments, the variable frequency driver adopts an ac-dc-ac voltage type ac frequency converter, which is controlled by VF/open loop vector/closed loop vector, the motor runs under constant torque below the base speed, runs under constant power above the base speed, can meet the requirements of two running modes of on-site power frequency and variable frequency, can achieve the exchange of the two modes, needs to be equipped with an integrated safety shutdown function to realize the safety emergency shutdown function, also needs to be equipped with a soft debugging diagnosis background, can access the running state of the frequency converter online, and has the functions of parameter setting, parameter saving, parameter uploading, waveform recording, waveform analysis, black box and the like, the control unit of the variable frequency driver can adopt external 24V power supply, and after the power body is disconnected, the controller communication is still normal, and meanwhile, the technical parameters as shown in the following table 1 should be satisfied.
TABLE 1
The heavy overload operation mode described in table 1 above is 1.5 times the heavy overload output current 377a, and may last for 1 minute every 5 minutes.
The invention has the beneficial effects that: the application is applicable to the technical field of metallurgical cold shearing equipment and provides a transmission system of the cold shearing equipment. The system comprises: the control module, the variable frequency drive, the first contactor and the second contactor, when the motor is in a normal working state, the first contactor is in a closed state, the second contactor is in an open state, and the motor is in a power frequency mode. The control module keeps consistent with the frequency and the phase of the power grid voltage by adjusting the voltage output by the variable frequency driver, controls the first contactor to be opened and the second contactor to be closed, so that the motor is switched to a variable frequency mode from a power frequency mode, and the variable frequency driver adjusts the output voltage according to the preset shutdown time length to control the motor to be shutdown in a deceleration mode so as to finish braking. According to the quick braking device, quick braking of the cold shearing machine is realized, the parking waiting time of the cold shearing machine is reduced, the overhaul time of cold shearing equipment is prolonged, and the equipment failure rate is reduced.
It should be understood that, the sequence number of each step in the above embodiment does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The transmission system of the cold shearing equipment is characterized by comprising a control module, a variable frequency driver, a first contactor and a second contactor;
the first end of the variable frequency driver and the first end of the first contactor are used for being connected with a power grid, and the second end of the variable frequency driver is connected with the first end of the second contactor; the second end of the first contactor and the second end of the second contactor are used for being connected with a motor of the cold shearing device;
the control module is respectively connected with the variable frequency driver, the first contactor and the second contactor;
when the motor is in a normal working state, the first contactor is in a closed state, the second contactor is in an open state, and the motor is in a power frequency mode;
when the motor is subjected to braking control, the control module is used for adjusting the frequency and the phase of the voltage output by the variable frequency driver and the power grid voltage to be consistent, controlling the first contactor to be opened, and controlling the second contactor to be closed so as to enable the motor to be switched from a power frequency mode to a variable frequency mode; the variable frequency driver is used for adjusting the output voltage according to the preset shutdown time length, controlling the motor to stop in a speed-reducing mode, and finishing braking.
2. The cold shear device drive system of claim 1, wherein the system further comprises a first switch;
the first end of the first switch is used for being connected with a power grid, and the second end of the first switch is respectively connected with the first end of the variable frequency driver and the first end of the first contactor;
when the motor is in a normal working state, the first switch is in a closed state;
and when the motor is braked, the control module is further used for controlling the first switch to be switched from the closed state to the open state after the motor is braked.
3. The cold shear device drive system of claim 2, wherein the system further comprises a voltage detection module; the voltage detection module is connected with the control module;
when the motor is subjected to braking control, the voltage detection module is used for detecting the frequency and the phase of the power grid voltage, and the detected frequency and phase of the power grid voltage are sent to the control module; the control module is specifically configured to adjust the frequency and phase of the voltage output by the variable frequency driver to be consistent with the frequency and phase of the grid voltage according to the frequency and phase of the received grid voltage.
4. A cold shear device drive system as in claim 3, wherein the first switch, the first contactor and the second contactor are all in an open state when the motor is in a shutdown state;
when the motor is started and controlled, the control module is used for controlling the first switch and the second contactor to be switched from an open state to a closed state so as to enable the motor to be in a variable frequency mode; the variable frequency driver is used for adjusting the output voltage according to the preset starting time length and controlling the motor to rise;
the voltage detection module is used for detecting the frequency and the phase of the power grid voltage and sending the detected frequency and phase of the power grid voltage to the control module; and the control module is used for controlling the second contactor to be opened and the first contactor to be closed when judging that the frequency and the phase of the voltage output by the variable frequency driver and the power grid voltage are consistent, so that the motor is switched from a variable frequency mode to a power frequency mode.
5. The transmission system of cold shear equipment according to claim 1, wherein during switching of the power frequency mode and the variable frequency mode, a switching current is less than or equal to twice the rated current of the motor.
6. The cold shear device drive system of claim 2, wherein the system further comprises a human-machine interaction module;
the man-machine interaction module is connected with the control module and is used for receiving instruction information of a user and sending the instruction information to the control module; the instruction information is used for instructing the control module to control the motor to start, brake or switch modes;
the control module is also used for carrying out corresponding control according to the instruction information.
7. The cold shear device drive system of claim 6, wherein the human-machine interaction module further comprises an indication module;
the indication module is used for displaying the running state of the system.
8. The cold shear device drive system of claim 2, further comprising a power module, a second switch;
the first end of the second switch is used for being connected with the power supply module, and the second end of the second switch is respectively connected with the first end of the variable frequency driver and the first end of the first contactor;
when the power grid is powered off, the control module is used for controlling the first switch to be opened, the second switch to be closed, and the power supply module is used for providing a power frequency power supply required by the system.
9. The cold shear device drive system of claim 8, wherein the control module is further configured to control the second switch to open and the first switch to close when the voltage detection module detects the grid voltage.
10. The cold shear device drive system of any one of claims 1-9, wherein the control module is a PLC module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310327514.7A CN116393753A (en) | 2023-03-30 | 2023-03-30 | Transmission system of cold shearing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310327514.7A CN116393753A (en) | 2023-03-30 | 2023-03-30 | Transmission system of cold shearing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116393753A true CN116393753A (en) | 2023-07-07 |
Family
ID=87006852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310327514.7A Pending CN116393753A (en) | 2023-03-30 | 2023-03-30 | Transmission system of cold shearing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116393753A (en) |
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2023
- 2023-03-30 CN CN202310327514.7A patent/CN116393753A/en active Pending
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