CN219286139U - Control circuit for residual magnetism removal of lifting electromagnet - Google Patents
Control circuit for residual magnetism removal of lifting electromagnet Download PDFInfo
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- CN219286139U CN219286139U CN202223358877.7U CN202223358877U CN219286139U CN 219286139 U CN219286139 U CN 219286139U CN 202223358877 U CN202223358877 U CN 202223358877U CN 219286139 U CN219286139 U CN 219286139U
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Abstract
The utility model relates to a control circuit for lifting electromagnet remanence removal, which comprises: an alternating current power supply; the intelligent thyristor rectifying module is electrically connected with the alternating current power supply; the electromagnet exciting coil is connected with the intelligent thyristor rectifying module; the control unit is respectively and electrically connected with the alternating current power supply and the intelligent thyristor rectifying module; the energy storage oscillation module is connected with the electromagnet exciting coil in parallel and is connected with the intelligent thyristor rectifying module; the contactor comprises a control coil and a main contact, wherein the control coil is connected between an alternating current power supply and the control unit, the control coil and the main contact are in linkage fit, and the main contact is used for controlling the on-off between the energy storage oscillation module and the electromagnet exciting coil, so that the on-off between the energy storage oscillation module and the electromagnet exciting coil is controlled. The control circuit is safe and reliable, and solves the problems of damage to electronic elements in the control cabinet and short service life caused by overheating of the inside of the control cabinet. Meanwhile, residual magnetism is eliminated for the sucked material, and convenience is provided for subsequent processing.
Description
Technical Field
The utility model relates to the technical field of lifting electromagnets, in particular to a control circuit for residual magnetism removal of a lifting electromagnet.
Background
The lifting electromagnet has wide application, can greatly improve the carrying efficiency of the ferromagnetic material, saves the labor cost and is beneficial to realizing automatic production.
However, there are two problems during use: firstly, because the ferromagnetic material has the phenomenon of remanence, the remanence exists in the sucked material in the process of transferring, thereby influencing the subsequent processing and use. And secondly, because the electromagnet belongs to a large inductance element, when a large current passes through the coil of the electromagnet, large magnetic field energy can be stored in the coil. When the electromagnet is de-energized, the stored energy is released in a very short time, which is now typically dissipated through a high power resistor. The method is slow, and can generate a large amount of heat, even up to more than 100 ℃, so that the service life and safety of the control cabinet are affected.
In view of this, it is needed to develop a set of equipment which can solve the problem of residual magnetism of ferromagnetic materials, and is safe and stable and has no heat.
Disclosure of Invention
In view of the above, the utility model aims to provide a control circuit for lifting electromagnet remanence removal, which can effectively solve the problem of remanence of ferromagnetic materials, and can be safe, stable and free of heating, so as to solve the problems in the prior art.
According to the present utility model there is provided a control circuit for lifting electromagnet de-remanence comprising:
an alternating current power supply;
the intelligent thyristor rectifying module is electrically connected with the alternating current power supply;
the electromagnet exciting coil is connected with the intelligent thyristor rectifying module;
the control unit is respectively and electrically connected with the alternating current power supply and the intelligent thyristor rectifying module;
the energy storage oscillation module is connected with the electromagnet exciting coil in parallel and is connected with the intelligent thyristor rectifying module;
the contactor comprises a control coil and a main contact, wherein the control coil is connected between an alternating current power supply and the control unit, the control coil and the main contact are in linkage fit use, the main contact is used for controlling the on-off between the energy storage oscillation module and the exciting coil of the electromagnet, and the on-off between the energy storage oscillation module and the exciting coil of the electromagnet is controlled by controlling the on-off of the main contact through the control coil, so that the on-off between the energy storage oscillation module and the exciting coil of the electromagnet is controlled;
the energy storage oscillation module comprises a capacitor and a resistor which are arranged in parallel, the main contact is arranged on a connecting line between the intelligent thyristor rectifying module and the energy storage oscillation module, after the electromagnet exciting coil is controlled to be disconnected and excited, an LC oscillating circuit and an RL serial circuit are sequentially formed between the energy storage oscillation module and the electromagnet exciting coil, wherein the LC oscillating circuit is firstly formed between the capacitor and the electromagnet exciting coil, and then the RL serial circuit is formed between the resistor and the electromagnet exciting coil.
Preferably, two terminals of the electromagnet exciting coil are respectively connected with the positive pole and the negative pole of the intelligent thyristor rectifying module to form a first branch,
the energy storage oscillation module is used as a second branch and connected with the first branch in parallel, and the main contact is arranged on the second branch.
Preferably, the main contact is used for controlling the on-off of the energy storage oscillation module and the exciting coil of the electromagnet, so as to control the formation of the LC oscillation circuit and the RL series circuit.
Preferably, the intelligent thyristor rectifier further comprises a circuit break protector, wherein the circuit break protector is connected to a connecting circuit between the alternating current power supply and the intelligent thyristor rectifier module.
Preferably, the circuit breaker further comprises a first transformer connected to a connection circuit between the circuit breaker and the intelligent thyristor rectifying module.
Preferably, a primary coil of the first transformer is connected with the circuit breaking protector, and a secondary coil of the first transformer is connected with the intelligent thyristor rectifying module.
Preferably, the control unit further comprises a second transformer connected between the ac power source and the control unit.
Preferably, the ac power supply is a three-phase ac power supply, a live wire and a zero wire of the three-phase ac power supply are connected with a primary coil of the second transformer, and a secondary coil of the second transformer is connected with the control unit.
Preferably, the control unit is a PLC controller.
Preferably, the intelligent thyristor rectifying module is provided with a circuit breaking protection module, an overvoltage protection template and an overcurrent protection module.
The beneficial effects are that:
compared with other similar products, the control circuit for removing residual magnetism of the lifting electromagnet has the advantages that the control system is safe and reliable, the traditional method of consuming electromagnet energy in a heat energy mode is changed, and the problems of damage to electronic elements in the control cabinet and short service life caused by overheating of the inside of the control cabinet are solved. Meanwhile, residual magnetism is eliminated for the sucked material, and convenience is provided for subsequent processing. The method can be widely applied to the working sites of various lifting electromagnets with the residual magnetism removal requirement.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a control circuit for lifting electromagnet de-remanence according to an embodiment of the utility model.
Fig. 2 shows a circuit diagram of a control circuit for lifting electromagnet de-remanence according to an embodiment of the utility model.
In the figure: the circuit breaker comprises an alternating current power supply 100, a circuit breaker 1, a first transformer 2, a second transformer 3, an intelligent thyristor rectifying module 4, a control unit 5, a control coil 6, a main contact 7, an energy storage oscillating module 8, a capacitor 81, a resistor 82 and an electromagnet exciting coil 9.
Detailed Description
Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.
As shown in fig. 1 to 2, the present utility model provides a control circuit for lifting electromagnet de-remanence, which comprises an ac power supply 100, an intelligent thyristor rectifying module 4, an electromagnet exciting coil 9, a control unit 5, an energy storage oscillating module 8 and a contactor.
An ac power source 100, in this embodiment three-phase ac power; the intelligent thyristor rectification module 4 is electrically connected with the alternating current power supply 100; the electromagnet exciting coil 9 is connected with the intelligent thyristor rectifying module 4; the control unit 5 is electrically connected with the alternating current power supply 100 and the intelligent thyristor rectifying module 4 respectively; the energy storage oscillation module 8 is connected with the electromagnet exciting coil 9 in parallel to the intelligent thyristor rectification module 4; the contactor comprises a control coil 6 and a main contact 7, wherein the control coil 6 is connected between the alternating current power supply 100 and the control unit 5, the control coil 6 and the main contact 7 are in linkage fit, the main contact is used for controlling the on-off between the energy storage oscillation module and the electromagnet exciting coil, and the on-off between the energy storage oscillation module and the electromagnet exciting coil is controlled by controlling the on-off of the control coil 6 to control the on-off between the energy storage oscillation module and the electromagnet exciting coil by controlling the on-off of the main contact 7.
The energy storage oscillation module 8 comprises a capacitor 81 and a resistor 82 which are arranged in parallel, the main contact 7 is arranged on a connecting line between the intelligent thyristor rectification module 4 and the energy storage oscillation module 8, after the electromagnet exciting coil 9 is controlled to be disconnected and excited, an LC oscillating circuit and an RL serial circuit are sequentially formed between the energy storage oscillation module 8 and the electromagnet exciting coil 9, wherein the LC oscillating circuit is firstly formed between the capacitor 81 and the electromagnet exciting coil 9, and then the RL serial circuit is formed between the resistor 82 and the electromagnet exciting coil 9.
Two wiring ends of the electromagnet exciting coil 9 are respectively connected with the positive electrode and the negative electrode of the intelligent thyristor rectifying module 4 to form a first branch, the energy storage oscillating module 8 is used as a second branch to be connected with the first branch in parallel, and the main contact 7 is arranged on the second branch.
In this embodiment, the intelligent thyristor rectifying module 4 has a circuit breaking protection module, an overvoltage protection module, and an overcurrent protection module (not shown), so that the intelligent thyristor rectifying module 4 has circuit breaking protection, overvoltage protection, and overcurrent protection functions. The control unit 5 is a PLC controller.
The main contact 7 is used for controlling the on-off of the energy storage oscillation module 8 and the electromagnet exciting coil 9, so as to control the formation of an LC oscillating circuit and an RL series circuit.
Further, the control circuit for lifting electromagnet remanence removal further comprises a circuit breaking protector 1, wherein the circuit breaking protector 1 is connected to a connecting circuit between the alternating current power supply 100 and the intelligent thyristor rectifying module 4, and the circuit breaking protector 1 is used for protecting a main circuit, so that the whole control system is convenient to maintain, safe and stable.
Further, the control circuit for lifting electromagnet remanence removal further comprises a first transformer 2, wherein the first transformer 2 is connected to a connecting circuit between the circuit breaking protector 1 and the intelligent thyristor rectifying module 4. The primary coil of the first transformer 2 is connected with the circuit breaking protector 1, and the secondary coil of the first transformer 2 is connected with the intelligent thyristor rectifying module 4.
Further, the control circuit for removing remanence of the lifting electromagnet further comprises a second transformer 3, wherein the second transformer 3 is connected between the alternating current power supply 100 and the control unit 5. The ac power supply 100 is a three-phase ac power supply 100, and the live wire and the zero wire of the three-phase ac power supply 100 are connected to the primary winding of the second transformer 3, and the secondary winding of the second transformer 3 is connected to the control unit 5.
In the embodiment, an intelligent thyristor rectifying module 4 is adopted to provide a direct current power supply for an electromagnet exciting coil 9, and an energy storage oscillating module 8 and the electromagnet exciting coil 9 form an under-damped oscillating circuit. After the electromagnet exciting coil 9 is controlled to be disconnected and excited, a capacitor 81 in the energy storage oscillating module 8 and the electromagnet exciting coil 9 form an LC oscillating circuit, and the inductance current lags behind the voltage 90 degrees, the charging current advances ahead of the voltage 90 degrees, and at the moment, the capacitor 81 is charged by a direct current power supply corresponding to the electromagnet exciting coil 9, and the charging peak voltage is about 1000V. After the second resonance the magnetization factor inside the ferromagnetic material has been disturbed. And then, forming an RL series circuit by a resistor 82 in the energy storage oscillation module 8 and the electromagnet exciting coil 9, and enabling the circuit to enter a damping attenuation stage. And finally, all energy of the electromagnet is consumed, and the whole demagnetization process is completed. The remanence of the ferromagnetic material demagnetized by the control system can be less than 20Gs.
Compared with other similar products, the control circuit for removing residual magnetism of the lifting electromagnet has the advantages that the control system is safe and reliable, the traditional method of consuming electromagnet energy in a heat energy mode is changed, and the problems of damage to electronic elements in the control cabinet and short service life caused by overheating of the inside of the control cabinet are solved. Meanwhile, residual magnetism is eliminated for the sucked material, and convenience is provided for subsequent processing. The method can be widely applied to the working sites of various lifting electromagnets with the residual magnetism removal requirement.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A control circuit for de-remanence of a lifting electromagnet, comprising:
an alternating current power supply;
the intelligent thyristor rectifying module is electrically connected with the alternating current power supply;
the electromagnet exciting coil is connected with the intelligent thyristor rectifying module;
the control unit is respectively and electrically connected with the alternating current power supply and the intelligent thyristor rectifying module;
the energy storage oscillation module is connected with the electromagnet exciting coil in parallel and is connected with the intelligent thyristor rectifying module;
the contactor comprises a control coil and a main contact, wherein the control coil is connected between an alternating current power supply and the control unit, the control coil and the main contact are in linkage fit use, the main contact is used for controlling the on-off between the energy storage oscillation module and the exciting coil of the electromagnet, and the on-off between the energy storage oscillation module and the exciting coil of the electromagnet is controlled by controlling the on-off of the main contact through the control coil, so that the on-off between the energy storage oscillation module and the exciting coil of the electromagnet is controlled;
the energy storage oscillation module comprises a capacitor and a resistor which are arranged in parallel, after the electromagnet exciting coil is controlled to be disconnected and excited, an LC oscillating circuit and an RL serial circuit are sequentially formed between the energy storage oscillation module and the electromagnet exciting coil, wherein the LC oscillating circuit is firstly formed between the capacitor and the electromagnet exciting coil, and then the RL serial circuit is formed between the resistor and the electromagnet exciting coil.
2. The control circuit for lifting electromagnet de-remanence according to claim 1, wherein two terminals of the electromagnet exciting coil are respectively connected to the positive pole and the negative pole of the intelligent thyristor rectifying module to form a first branch,
the energy storage oscillation module is used as a second branch and connected with the first branch in parallel, and the main contact is arranged on the second branch.
3. The control circuit for de-remanence of a lifting electromagnet according to claim 2, wherein the main contact is configured to control the on-off of the energy storage oscillating module and the electromagnet exciting coil, thereby controlling the formation of the LC oscillating circuit and the RL series circuit.
4. The control circuit for de-remanence of a lifting electromagnet of claim 1, further comprising a trip protector connected to a connection circuit between the ac power source and a smart thyristor rectifying module.
5. The control circuit for de-remanence of a lifting electromagnet of claim 4 further comprising a first transformer connected to a connection circuit between the trip protector and a smart thyristor rectification module.
6. The control circuit for lifting electromagnet de-remanence of claim 5, wherein a primary coil of the first transformer is connected to the circuit breaker and a secondary coil of the first transformer is connected to the intelligent thyristor rectification module.
7. The control circuit for de-remanence of a lifting electromagnet of claim 6 further comprising a second transformer connected between the ac power source and the control unit.
8. The control circuit for lifting electromagnet de-remanence according to claim 7, wherein the ac power source is a three-phase ac power source, a live wire and a neutral wire of the three-phase ac power source are connected to a primary coil of the second transformer, and a secondary coil of the second transformer is connected to the control unit.
9. The control circuit for lifting electromagnet de-remanence of claim 1 wherein the control unit is a PLC controller.
10. The control circuit for de-remanence of a lifting electromagnet of claim 1 wherein the intelligent thyristor rectifier module has a circuit break protection module, an overvoltage protection template, and an overcurrent protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223358877.7U CN219286139U (en) | 2022-12-13 | 2022-12-13 | Control circuit for residual magnetism removal of lifting electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223358877.7U CN219286139U (en) | 2022-12-13 | 2022-12-13 | Control circuit for residual magnetism removal of lifting electromagnet |
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| Publication Number | Publication Date |
|---|---|
| CN219286139U true CN219286139U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223358877.7U Active CN219286139U (en) | 2022-12-13 | 2022-12-13 | Control circuit for residual magnetism removal of lifting electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219286139U (en) |
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- 2022-12-13 CN CN202223358877.7U patent/CN219286139U/en active Active
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