CN115208212A - Electromagnetic chuck control method and device - Google Patents

Electromagnetic chuck control method and device Download PDF

Info

Publication number
CN115208212A
CN115208212A CN202210932211.3A CN202210932211A CN115208212A CN 115208212 A CN115208212 A CN 115208212A CN 202210932211 A CN202210932211 A CN 202210932211A CN 115208212 A CN115208212 A CN 115208212A
Authority
CN
China
Prior art keywords
electromagnetic chuck
rectifier bridge
voltage
external power
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210932211.3A
Other languages
Chinese (zh)
Inventor
郑磊
葛瑞彩
李耀
刘刚强
殷铈钞
胡恒强
王慧宾
许丹丹
张亚欧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou XCMG Excavator Machinery Co Ltd
Original Assignee
Xuzhou XCMG Excavator Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xuzhou XCMG Excavator Machinery Co Ltd filed Critical Xuzhou XCMG Excavator Machinery Co Ltd
Priority to CN202210932211.3A priority Critical patent/CN115208212A/en
Publication of CN115208212A publication Critical patent/CN115208212A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/90—Devices for picking-up and depositing articles or materials
    • B65G47/92—Devices for picking-up and depositing articles or materials incorporating electrostatic or magnetic grippers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
    • H02M1/0022—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters the disturbance parameters being input voltage fluctuations
    • 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
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The invention discloses a method and a device for controlling an electromagnetic chuck, wherein the method comprises the following steps: acquiring voltage U1 of an external power supply; comparing the voltage U1 of the external power supply with a standard set voltage U2, outputting a set rectifier bridge angle if the ratio A is within a preset range, and adjusting the rectifier bridge control angle according to the ratio A if the ratio A is outside the preset range; acquiring the working voltage U3 of the electromagnetic chuck according to the angle controlled by the rectifier bridge; comparing the working voltage U3 of the electromagnetic chuck with the required voltage U4 of the electromagnetic chuck, outputting a set rectifier bridge angle if the ratio B is within a preset range, and adjusting the rectifier bridge control angle according to B if the ratio B is outside the preset range; the rectifier bridge angle controls the electromagnetic chuck to work. This application is through the two-stage comparison, the effectual stability of having guaranteed to electromagnet control.

Description

Electromagnetic chuck control method and device
Technical Field
The invention relates to the technical field of suckers, in particular to a method and a device for controlling an electromagnetic sucker.
Background
In recent years, with the increase of environmental protection pressure, particularly, the recycling of resources such as waste steel products, and the like has been carried out, and therefore, the demands for engineering machinery having functions of material handling, unloading, and the like have been increasing.
At present, machines such as a lotus claw and Bei Kedou which are matched with a digger are generally adopted in the market for carrying and unloading materials, but each machine has certain limitation on the shape and the volume of the grabbed materials. Is not suitable for grabbing bulk materials or cylindrical materials at the bottom of some carriages or cabins. On the contrary, the electromagnetic chuck meets the requirements of bulk materials at the bottom of a carriage or a cabin and the requirements of material processing operations such as steel plates, steel scraps and the like.
(1) At present, the grabbing material of electromagnetism electric magnetic chuck on the market mainly reforms transform through the excavator, and main transformation scheme has three kinds: the first one is that an independent generator set is arranged outside, the generator set is connected with a sucker control cabinet, and the control cabinet is connected with an electromagnetic sucker; the second one is that a generator is rotated on an engine and is connected with a sucker control cabinet, and the control cabinet is connected with an electromagnetic sucker; the third is to drive a hydraulic motor through hydraulic pressure, the hydraulic motor drives a generator to generate electricity, the generator is connected with a control cabinet, and the control cabinet is connected with an electromagnetic chuck. The three reconstruction schemes are adopted to realize the work of the electromagnetic chuck, the external generator set, the engine drives the generator, and the hydraulic motor drives the generator, so that the power supply voltage is inconsistent, the chuck control system cannot be used universally, and each type of the chuck control system is required to be provided with an independent control system. When the sucking disc is used for sucking materials, the phenomenon that the voltage output to the sucking disc by the control cabinet is unstable can also exist.
(2) In the prior art, CN201420187131.0 provides a steel sucking machine for dismantling a ship, which generates electricity through a sucking disc motor, supplies direct current to an electromagnetic steel sucking disc after being rectified by a control cabinet, and is additionally provided with an electromagnetic steel sucking disc switch in a cab to control the material sucking and discharging of the electromagnetic steel sucking disc. By adopting the scheme, the control system is simple, no electromagnetic chuck magnetic force adjusting device is used, and the magnetic force cannot be adjusted; the working state of the electromagnetic chuck is monitored in real time without an instrument, and a safety protection mechanism is lacked. When the sucker sucks materials, the voltage output to the sucker by the control cabinet is unstable.
Disclosure of Invention
The invention aims to provide a method and a device for controlling an electromagnetic chuck, which aim to solve the problem that the voltage output to the chuck is unstable due to the difference of the power supply voltages of different power supply sources in the prior art.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the application discloses an electromagnetic chuck control method, including:
acquiring voltage U1 of an external power supply;
comparing the voltage U1 of the external power supply with a standard set voltage U2, outputting a set rectifier bridge angle if the ratio A is within a preset range, and adjusting the rectifier bridge control angle according to the ratio A if the ratio A is outside the preset range;
acquiring the working voltage U3 of the electromagnetic chuck according to the angle controlled by the rectifier bridge;
comparing the working voltage U3 of the electromagnetic chuck with the required voltage U4 of the electromagnetic chuck, outputting a rectifier bridge angle if the ratio B is within a preset range, and adjusting the rectifier bridge control angle according to the ratio B if the ratio B is outside the preset range;
and controlling the electromagnetic chuck to work according to the angle of the rectifier bridge.
Further, the external power source includes a hydraulic motor generator, a generator set, and a utility power.
Further, if the external power source is a hydraulic motor generator, the method also comprises the following steps:
acquiring a frequency value f1 of a hydraulic motor;
comparing the obtained frequency value f1 of the hydraulic motor with the required frequency value f2, outputting the set electromagnetic valve current if the ratio n is within a preset range, and obtaining the electromagnetic valve current again according to n if the ratio n is out of the preset range, and adjusting the electromagnetic valve of the hydraulic motor according to the electromagnetic valve current so as to adjust the frequency value f1 of the hydraulic motor.
Further, still include:
detecting the connection state of an external power supply, the electric quantity of an energy storage capacitor and the working state of the electromagnetic chuck;
when the external power supply is in a connection state and the electromagnetic chuck does not work, the energy storage capacitor is controlled to be charged;
when the external power supply is in a connection state, the electromagnetic chuck works and the electric quantity of the energy storage capacitor is lower than a set value C, the energy storage capacitor is controlled to be charged;
and when the external power supply is in a disconnected state and the electromagnetic chuck works, the energy storage capacitor is controlled to discharge so that the electromagnetic chuck works.
Further, when the external power supply is in an off state and the electromagnetic chuck works, the method further comprises the following steps:
acquiring real-time electric quantity of an energy storage capacitor;
and sending an alarm instruction when the real-time electric quantity of the energy storage capacitor is lower than a set value D.
The invention also discloses an electromagnetic chuck control device, comprising:
the alternating current contactor is connected with a plurality of external power supplies and is also connected with a controller;
the alternating current contactor is connected with a rectifier bridge, the rectifier bridge is connected with the electromagnetic chuck, and the rectifier bridge is connected with the controller;
the controller is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the external power supply voltage U1 and the standard setting voltage U2, and is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the working voltage U3 of the electromagnetic chuck and the required voltage U4 of the electromagnetic chuck.
Further, the external power supply comprises a hydraulic motor generator, a generator set and mains supply;
the hydraulic motor generator, the generator set and the commercial power are respectively connected with the U-phase transformer, the V-phase transformer and the W-phase transformer through the alternating current contactors, and the U-phase transformer, the V-phase transformer and the W-phase transformer are connected with the controller through the comparator.
Furthermore, the controller is connected with an electromagnetic valve for controlling the hydraulic motor generator.
Furthermore, an inverter is connected between the rectifier bridge and the alternating current contactor, the inverter is connected with an energy storage capacitor through a control module, and the control module is connected with the control module;
the controller is used for controlling the charging and discharging of the energy storage capacitor according to the connection state of the external power supply, the electric quantity of the energy storage capacitor and the working state of the electromagnetic chuck.
Furthermore, an operation panel is connected to the controller, and an instrument is connected to the operation panel.
According to the technical scheme, the embodiment of the invention at least has the following effects:
the input voltage of the external power supply is compared with the standard setting voltage, the rectifier bridge angle set by the output or the rectifier bridge control angle is adjusted, the actual working voltage of the sucker is obtained according to the rectifier bridge control angle, the actual working voltage is compared with the required voltage, the rectifier bridge control angle or the output rectifier bridge angle is adjusted according to the comparison result, the electromagnetic sucker is controlled to work, when the input voltage and the standard voltage have differences, the stability of the output voltage is guaranteed through two-stage comparison, and the working stability of the electromagnetic sucker is effectively guaranteed.
Drawings
FIG. 1 is a block diagram of a connection of a control device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a control method according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for controlling frequency adjustment of a hydraulic motor according to an embodiment of the present invention;
FIG. 4 is a flowchart of an inversion charge/discharge control method according to an embodiment of the present invention
Wherein: 1. an AC contactor; 2. a U-phase transformer; 3. a V-phase transformer; 4. a W-phase transformer; 5. a comparator 1; 6. a comparator 2; 7. a comparator 3; 8. an SCR rectifier bridge; 9. an electromagnetic chuck; 10. a control panel; 11. a controller; 12. a suction cup operating switch; 13. a mode switch; 14. an electromagnetic valve; 15. a meter; 16. a hydraulic motor generator; 17. a generator set; 18. commercial power; 19. an inverter; 20. a control module; 21. and an energy storage capacitor.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments.
The application discloses electromagnet controlling means. The device comprises an alternating current contactor 1, wherein the alternating current contactor 1 is connected with a plurality of external power supplies, and the alternating current contactor 1 is also connected with a controller 11; the alternating current contactor 1 is connected with a rectifier bridge, the rectifier bridge is connected with the electromagnetic chuck 9, and the rectifier bridge is connected with the controller 11; the controller is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the external power supply voltage U1 and the standard setting voltage U2, and is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the working voltage U3 of the electromagnetic chuck and the required voltage U4 of the electromagnetic chuck.
Specifically, the external power supply includes: an external three-phase alternating current power supply U, V, W (three external power supplies are available on the market, namely a hydraulic motor generator 16, a generator set 17 and a mains supply 18) is respectively connected to the alternating current contactor 1, the alternating current contactor 1 is electrically connected with the U-phase transformer 2, the V-phase transformer 3 and the W-phase transformer 4 are electrically connected with the alternating current contactor 1, and the U-phase transformer 2 and the V-phase transformer 3 are electrically connected with the comparator I5 after passing through the transformers; the V-phase transformer 3 and the W-phase transformer 4 are electrically connected with the second comparator 6 after passing through the transformer; and the U-phase transformer 2 and the W-phase transformer 4 are electrically connected with a third comparator 7 after passing through the transformers. The comparator 1, the comparator 2, and the comparator 3 are connected to a control panel 10. The control panel 10 is connected with a controller 11, and the controller 11 is connected with a sucker operating switch 12, a mode switch 13, an electromagnetic valve 14 and a meter 15.
Meanwhile, the ac contactor 1 is electrically connected to the inverter 19, and the inverter 19, the control module 20, and the energy storage capacitor 21 are electrically connected in sequence. The control module is connected to a controller 11 via a control panel 10.
An external three-phase alternating current power supply U, V, W is electrically connected with the SCR rectifier bridge 8 at the same time, the SCR rectifier bridge 8 is electrically connected with the control panel 10 at the same time, the output voltage of the SCR rectifier bridge 8 is electrically connected with the electromagnetic chuck 9, and the output voltage is fed back to be connected into the control panel 10.
In the device, the controller 11 can control the operation of the electromagnetic chuck 9 according to the comparison result of the external power supply voltage U1 and the standard setting voltage U2, and when the comparison result is in the setting range, the angle of the SCR rectifier bridge 8 is adjusted if the comparison result is out of the setting range. After the angle of the SCR rectifier bridge 8 is adjusted, the working voltage U3 of the electromagnetic chuck is obtained, the U3 is compared with the required voltage U4 of the electromagnetic chuck, and the electromagnetic chuck is controlled to work or the angle of the rectifier bridge is adjusted again according to the comparison result.
In the device, through the design of inverter 19, control module 20 and energy storage capacitor 21, can realize the charge-discharge, when external power source is hydraulic motor generator 16 and generating set 17, the controller controls energy storage capacitor charge-discharge according to external power source's state, energy storage capacitor 21's electric quantity and electromagnet 9's operating condition, prevents on the one hand that external power source work from causing the electric quantity extravagant, and on the other hand can guarantee electromagnet 9's steady operation.
The application also discloses an electromagnetic chuck control method, which can be realized based on the device in the embodiment, and the method comprises the following steps: acquiring voltage U1 of an external power supply; comparing the voltage U1 of the external power supply with a standard set voltage U2, outputting a set rectifier bridge angle if the ratio A is within a preset range, and adjusting the rectifier bridge control angle according to the ratio A if the ratio A is outside the preset range; acquiring the working voltage U3 of the sucker according to the angle controlled by the rectifier bridge; comparing the working voltage U3 of the sucker with the required voltage U4 of the sucker, outputting a set rectifier bridge angle if the ratio B is within a preset range, and adjusting the rectifier bridge control angle according to the ratio B if the ratio B is outside the preset range; and controlling the electromagnetic chuck to work according to the angle of the rectifier bridge.
This application is compared through external power source input voltage and standard settlement voltage, rectifier bridge angle or adjustment rectifier bridge control angle with the output settlement, acquire sucking disc actual operating voltage according to rectifier bridge control angle, compare actual operating voltage and demand voltage, adjust rectifier bridge control angle or output rectifier bridge angle according to the comparative result, and then control electromagnet work, when there is the difference between input voltage and standard voltage, output voltage's stability has been guaranteed through the two-stage comparison, the effectual job stabilization who guarantees electromagnet.
Specifically, the method for controlling the electromagnetic chuck comprises the following steps:
and step 10, detecting the voltage U1 of an external input power supply.
In this step, the external input power may be power provided by the hydraulic motor driving the generator to operate, power provided by the engine driving the generator to operate, power provided by the commercial power, or power provided by other power supply devices.
And 20, comparing the voltage U1 of the external power supply with the standard set voltage U2, outputting the set angle of the rectifier bridge if the ratio A is within a preset range, and adjusting the control angle of the rectifier bridge according to A if the ratio A is outside the preset range.
In this step, the ratio a is preferably between 0.95 and 1.05, and this design can make the difference between the external power voltage and the standard setting voltage within a controllable range, and can still output the set rectifier bridge angle when the stable operation of the electromagnetic chuck is not affected. If the difference between the external power supply voltage and the standard setting voltage can influence the stable work of the electromagnetic chuck, the control angle of the rectifier bridge needs to be adjusted again, and the effect of controlling the electromagnetic chuck is ensured.
And step 30, obtaining the working voltage U3 of the sucker according to the angle controlled by the rectifier bridge. And the working voltage U3 of the sucker is obtained according to the control angle of the rectifier bridge.
And step 40, comparing the working voltage U3 of the sucker with the required voltage U4 of the sucker, outputting the set control angle of the rectifier bridge if the ratio B is within a preset range, and adjusting the control angle of the rectifier bridge according to the ratio B if the ratio B is outside the preset range.
In the step, the ratio B is preferably between 0.95 and 1.05, and the design can ensure that the difference between the actual working voltage U3 and the set required voltage U4 is within a controllable range, and the set rectifier bridge angle can still be output when the suction disc cannot be influenced to suck the workpiece. If the difference between the actual working voltage U3 and the set required voltage U4 affects the suction of the workpiece by the suction cup, the control angle of the rectifier bridge needs to be adjusted again, after the angle is adjusted, step 30 is executed again to obtain a new working voltage U3, and then the newly obtained working voltage is compared with the required voltage. Plus or minus 5% of the total amount of the active ingredients.
And step 50, adjusting the control angle of the rectifier bridge to output stable voltage and control the electromagnetic chuck to work when the input voltage is different.
In the step, the electromagnetic chuck is controlled to work according to the angle of the rectifier bridge. If the voltage U1 of the external power supply and the standard setting voltage U2 are in a preset range, the angle of the rectifier bridge is an initially set angle, and if the voltage is not in the preset range, the angle of the rectifier bridge is adjusted to meet the conditions.
The method comprises the steps of comparing an actual input voltage U1 with a standard set voltage U2, comparing an actual output working voltage U3 with a set required voltage U4, and regulating the output working voltage through two closed loops. Therefore, a stable output working voltage is provided under any working condition, and the stability of the material sucking operation is ensured.
When external power source drives the generator for hydraulic motor, the unstable phenomenon of frequency can appear, and this application provides a method that can realize stable frequency output:
step 100, obtaining a frequency value f1 of a hydraulic motor; the frequency value f1 of the hydraulic motor can be obtained by the controller at the step;
step 200, comparing the obtained frequency value f1 of the input power supply with a working requirement frequency value f2, outputting a set electromagnetic valve current output and set if the ratio n is within a preset range, and recalculating a current value according to n if the ratio n is out of the preset range; such as: the currently collected power frequency is 30HZ, the frequency required by the work is 50HZ, the current value is 390mA at the moment, and the current value n × 390 is recalculated by calculating n =50/30, and the current value is adjusted to 650mA at the moment.
Step 300, adjusting the electromagnetic valve of the hydraulic motor according to the current value to adjust the frequency value f1 of the input power supply
And step 400, the controller sends the current frequency value to the instrument through the CAN bus to display in real time.
After the external power supply is suddenly disconnected, the magnetic disc has no voltage, so that demagnetization can be caused, and if the material is sucked, the potential safety hazard that the material falls off can be caused. Therefore, a device for supplying power after the external power supply suddenly disappears is required. When the external power source is a generator set or a hydraulic motor generator, and the material suction operation is not performed, the machine operation causes energy waste, at this time, the generated electricity needs to be stored, and when the stored electric energy is used as an emergency, the charging and discharging control method is as shown in fig. 4:
step 60, detecting the input of an external power supply, and simultaneously detecting the electric quantity of the energy storage capacitor and the working state of the electromagnetic chuck;
and step 70, controlling the charging control module to charge when the external power supply is in a connection state and the electromagnetic chuck is not in a working state. If the electromagnetic chuck is in a working state, whether the electric quantity of the energy storage capacitor is lower than a set value or not is judged, if the electric quantity of the energy storage capacitor is lower than the set value, inversion charging is carried out, and if the electric quantity of the energy storage capacitor is higher than the set value, charging is not carried out.
And step 80, when the external power supply is detected to be suddenly powered off, controlling the alternating current contactor to be switched off, and simultaneously carrying out inversion on the energy storage capacitor to the inverter for supplying power.
And 90, displaying the electric quantity of the energy storage capacitor to the instrument, and performing safe operation according to the electric quantity.
It will be appreciated by those skilled in the art that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims (10)

1. A method of controlling an electromagnetic chuck, comprising:
acquiring voltage U1 of an external power supply;
comparing the voltage U1 of the external power supply with a standard set voltage U2, outputting a set rectifier bridge angle if the ratio A is within a preset range, and adjusting the rectifier bridge control angle according to the ratio A if the ratio A is outside the preset range;
acquiring the working voltage U3 of the electromagnetic chuck according to the angle controlled by the rectifier bridge;
comparing the working voltage U3 of the electromagnetic chuck with the required voltage U4 of the electromagnetic chuck, outputting a rectifier bridge angle if the ratio B is within a preset range, and adjusting the rectifier bridge control angle according to the ratio B if the ratio B is outside the preset range;
and controlling the electromagnetic chuck to work according to the angle of the rectifier bridge.
2. The electromagnetic chuck control method of claim 1, wherein the external power source comprises a hydraulic motor generator, a generator set, and a utility power.
3. The method of claim 2, wherein if the external power source is a hydraulic motor generator, further comprising the steps of:
acquiring a frequency value f1 of a hydraulic motor;
comparing the obtained frequency value f1 of the hydraulic motor with the required frequency value f2, outputting the set electromagnetic valve current if the ratio n is within a preset range, and obtaining the electromagnetic valve current again according to n if the ratio n is out of the preset range, and adjusting the electromagnetic valve of the hydraulic motor according to the electromagnetic valve current so as to adjust the frequency value f1 of the hydraulic motor.
4. The method of claim 1, further comprising:
detecting the connection state of an external power supply, the electric quantity of an energy storage capacitor and the working state of the electromagnetic chuck;
when the external power supply is in a connection state and the electromagnetic chuck does not work, the energy storage capacitor is controlled to be charged;
when the external power supply is in a connection state, the electromagnetic chuck works and the electric quantity of the energy storage capacitor is lower than a set value C, the energy storage capacitor is controlled to be charged;
and when the external power supply is in a disconnected state and the electromagnetic chuck works, the energy storage capacitor is controlled to discharge so that the electromagnetic chuck works.
5. The method as claimed in claim 4, wherein when the external power is off and the electromagnetic chuck is working, the method further comprises the steps of:
acquiring real-time electric quantity of an energy storage capacitor;
and sending an alarm instruction when the real-time electric quantity of the energy storage capacitor is lower than a set value D.
6. An electromagnetic chuck control device, comprising:
the alternating current contactor is connected with a plurality of external power supplies and is also connected with a controller;
the alternating current contactor is connected with a rectifier bridge, the rectifier bridge is connected with the electromagnetic chuck, and the rectifier bridge is connected with the controller;
the controller is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the external power supply voltage U1 and the standard setting voltage U2, and is used for controlling the electromagnetic chuck to work or adjusting the angle of the rectifier bridge according to the working voltage U3 of the electromagnetic chuck and the required voltage U4 of the electromagnetic chuck.
7. The electromagnetic chuck control device of claim 6, wherein the external power source comprises a hydraulic motor generator, a generator set, and a utility power;
the hydraulic motor generator, the generator set and the commercial power are respectively connected with the U-phase transformer, the V-phase transformer and the W-phase transformer through the alternating current contactors, and the U-phase transformer, the V-phase transformer and the W-phase transformer are connected with the controller through the comparator.
8. The electromagnetic chuck control device according to claim 7, wherein a solenoid valve for controlling a hydraulic motor generator is connected to the controller.
9. The electromagnetic chuck control device according to claim 6, characterized in that an inverter is further connected between the rectifier bridge and the ac contactor, the inverter is connected with the energy storage capacitor through a control module, and the control module is connected with the control;
the controller is used for controlling the energy storage capacitor to charge and discharge according to the connection state of the external power supply, the electric quantity of the energy storage capacitor and the working state of the electromagnetic chuck.
10. The electromagnetic chuck control device of claim 6, wherein the controller is connected to an operating panel, and the operating panel is connected to a meter.
CN202210932211.3A 2022-08-04 2022-08-04 Electromagnetic chuck control method and device Pending CN115208212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210932211.3A CN115208212A (en) 2022-08-04 2022-08-04 Electromagnetic chuck control method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210932211.3A CN115208212A (en) 2022-08-04 2022-08-04 Electromagnetic chuck control method and device

Publications (1)

Publication Number Publication Date
CN115208212A true CN115208212A (en) 2022-10-18

Family

ID=83586017

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210932211.3A Pending CN115208212A (en) 2022-08-04 2022-08-04 Electromagnetic chuck control method and device

Country Status (1)

Country Link
CN (1) CN115208212A (en)

Similar Documents

Publication Publication Date Title
CN106965815B (en) Power system and power control method of extended-range electric traction locomotive
US8896260B2 (en) Power supply unit for press machine
CN109391175B (en) Motor control device and machine tool system
CN107591789A (en) A kind of three phase variable frequency alternating current power-generating system over-voltage suppression device
CN109428533A (en) Control the motor drive of the step-up ratio of PWM converter
US20130193900A1 (en) Motor drive control device for limiting output of motor
US20140176025A1 (en) Energy retrieving device
CN102171130B (en) Crane system
CN110436283A (en) A kind of elevator energy storage control device and its control method
US20180356791A1 (en) Motor drive system including abnormality detection unit of power storage device
CN115208212A (en) Electromagnetic chuck control method and device
WO2012043479A1 (en) Hybrid drive device, crane control device, and crane device
JPH06121408A (en) Battery charging system
CN106411150B (en) The cascade multilevel converter and control method of bi-motor asynchronous operation can be driven
CN112803443A (en) Power supply system, power supply control method and energy storage air conditioning equipment
CN111146860A (en) Power supply device and power supply system
JP2008254830A (en) Crane device
JP2017158239A (en) Motor controller with torque command limit part
JP2008254828A (en) Crane device
CN210234713U (en) Novel power system
CN106006481B (en) Fork truck Special electromagnetic suspender
CN101652312B (en) Crane equipment
KR20100013096U (en) Toroidal charger
CN203221954U (en) New energy source automobile high-voltage discharge electric control system
CN201864442U (en) Inverter used for controlling alternating-current brake when electromagnetic lifter is in power failure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination