CN114977455B - Integral magnetizing and demagnetizing integrated system for permanent magnet equipment - Google Patents
Integral magnetizing and demagnetizing integrated system for permanent magnet equipment Download PDFInfo
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- CN114977455B CN114977455B CN202210682008.5A CN202210682008A CN114977455B CN 114977455 B CN114977455 B CN 114977455B CN 202210682008 A CN202210682008 A CN 202210682008A CN 114977455 B CN114977455 B CN 114977455B
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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention belongs to the field of permanent magnet equipment, and discloses a permanent magnet equipment integral magnetizing and demagnetizing integrated system; comprising the following steps: the device comprises a main control module, a charging module, an energy storage module, a charging and demagnetizing switch module and a charging and demagnetizing coil; the charging module is used for charging the energy storage module according to the charging control signal of the main control module; the energy storage module is used for storing electric energy; the magnetizing and demagnetizing switch module is used for realizing switching among a magnetizing mode, a demagnetizing mode and a magnetic pole overturning mode; the magnetizing and demagnetizing coil is used for generating a unidirectional pulse magnetic field and an oscillation damping pulse magnetic field which are required by the magnetizing and demagnetizing of the uniform acting area according to the output of the magnetizing and demagnetizing switch module. The invention is connected with the automatic control polarity transfer switch between the power supply and the magnetizing coil, the bidirectional switch can enable the circuit to generate unidirectional pulse current required by magnetizing and oscillation damping pulse current required by demagnetizing, and the automatic control polarity transfer switch can realize the automatic switching of the magnetic field direction of the magnetizing coil, thereby realizing the continuous magnetizing and demagnetizing of a plurality of alternating magnetic poles.
Description
Technical Field
The invention belongs to the field of permanent magnet equipment, and particularly relates to an integral magnetizing and demagnetizing integrated system of permanent magnet equipment.
Background
In the aspect of overall magnetizing and demagnetizing of permanent magnet equipment, domestic permanent magnet equipment generally adopts a pre-magnetizing technology that nonmagnetic permanent magnets are magnetized and then are installed on the equipment to form magnetic poles, strong magnetic force is generated due to the strong magnetism of the permanent magnets in the installation process, so that the manual assembly difficulty is high, the manual assembly is finished by means of a special auxiliary device, the efficiency is low, the consistency of spliced magnetic poles is possibly reduced, and the motor performance is influenced. Once collision absorption occurs, the permanent magnet is damaged, and even the motor is failed to be installed, so that personal safety is damaged.
In addition, some motors are limited by complex processes or structures, and cannot employ pre-magnetizing techniques, such as: the high temperature in the process of the rotor non-magnetic alloy sleeve thermal sleeve of the high-speed permanent magnet motor can lead the saturated permanent magnet to be irreversibly demagnetized, and the magnetic permanent magnet can seriously influence the dynamic balance precision of the rotor; the multilayer magnetic flux barrier structure of the permanent magnet auxiliary synchronous reluctance motor causes the permanent magnet slot to be very thin, and the permanent magnet sheet with magnetism is difficult to be installed efficiently and safely. If the magnetic pole is irreversibly demagnetized due to vibration, high temperature, high current and other conditions in the running process of the equipment, the equipment is completely disassembled to supplement the magnetic field to the fault magnetic pole, so that the maintenance difficulty is high and the cost is high. These factors seriously hamper further improvement of the performance of the permanent magnet device.
The whole magnetizing technology adopts a mode that nonmagnetic magnets are firstly mounted on equipment to be spliced into magnetic poles, then the magnetizing coils apply magnetic fields to magnetize the equipment or the magnetic poles, and the magnetic force of the ferromagnetic permanent magnets is not needed to be considered in the mounting process, so that the reinforcing structure can be simplified, the damage risk of the permanent magnets is reduced, and the personal safety is ensured. One-time discharge can complete the magnetizing of one or more magnetic poles, the overall efficiency is greatly improved, and the device is suitable for high-beat flow line production operation. And the non-magnetized permanent magnet is convenient for machining, and is beneficial to improving the mechanical precision, orientation consistency and residual magnetic quality of the magnetic pole. When the equipment is irreversibly demagnetized, the whole magnetizing technology can be utilized for magnetic compensation, and the equipment is not required to be completely disassembled. In addition, the integral demagnetizing technology can also realize the integral demagnetizing of equipment or magnetic poles, thereby being beneficial to equipment fault maintenance and the recycling of permanent magnets. Compared with the traditional pre-magnetizing technology, the whole magnetizing technology can meet the high-quality and automatic production requirements of large-scale permanent magnet equipment.
Conventional magnetizing equipment can only generate sinusoidal single-pulse current or oscillation damping pulse current, and can not simultaneously meet the magnetizing and demagnetizing requirements of permanent magnet equipment. Because the magnetic poles of the permanent magnet equipment are alternately distributed in the positive and negative directions, the magnetic field generated by the magnetizing system cannot change the direction, and the polarity of the magnetizing magnetic field needs to be manually changed after one pole is charged each time in the magnetizing process, so that the magnetic field in the opposite direction is generated to magnetize the next pole, the polarity changing process is time-consuming, and the overall efficiency of the magnetizing system is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a permanent magnet equipment magnetizing and demagnetizing integrated system, and aims to solve the problems that the magnetizing and demagnetizing requirements of the permanent magnet equipment cannot be met simultaneously and the magnetizing polarity cannot be switched automatically in the prior art.
The invention provides a permanent magnet equipment integral magnetizing and demagnetizing integrated system, which comprises: the device comprises a main control module, a charging module, an energy storage module, a charging and demagnetizing switch module and a charging and demagnetizing coil; the input end of the charging module is connected to the output end of the main control module, the output end of the charging module is connected to the second input end of the energy storage module, and the charging module is used for charging the energy storage module according to a charging control signal of the main control module; the first input end of the energy storage module is connected to the output end of the main control module, and the energy storage module is used for storing electric energy; the first input end of the magnetizing and demagnetizing switch module is connected to the output end of the main control module, the second input end of the magnetizing and demagnetizing switch module is connected to the first output end of the energy storage module, and the magnetizing and demagnetizing switch module is used for realizing switching among a magnetizing mode, a demagnetizing mode and a magnetic pole overturning mode according to a magnetizing and demagnetizing control signal of the main control module; the input end of the magnetizing and demagnetizing coil is connected to the output end of the magnetizing and demagnetizing switch module, and the magnetizing and demagnetizing coil is used for generating unidirectional pulse magnetic fields and oscillation damping pulse magnetic fields required by magnetizing and demagnetizing of a uniform acting area according to the output of the magnetizing and demagnetizing switch module.
Still further still include letting out the ability module, let out the second output that the ability module's input is connected to the energy storage module, let out the ability module and be used for when canceling this time fill demagnetize operation or the system trouble can't discharge the energy safety release in the energy storage module.
Further, the magnetizing and demagnetizing switch module comprises a driving unit, a switch unit and a filtering unit which are sequentially connected; the driving unit is used for realizing switch driving and state feedback of the switch unit; the switch unit is used for realizing the selection or switching of magnetizing control, demagnetizing control or polarity switching control; the filtering unit is used for filtering the switch control signal output by the switch unit and the state feedback signal output by the driving unit.
Still further, the switching unit includes: a main discharging switch, a charging/demagnetizing switch and a polarity conversion switch; the input end of the main discharging switch unit is connected to the first output end of the driving unit, and is used for realizing the on or off of the switch according to the driving signal of the driving unit and releasing the energy of the energy storage module to the magnetizing and demagnetizing coil to generate a magnetic field; the first input end of the charging and demagnetizing switch unit is connected to the output end of the main discharging switch unit, the second input end of the charging and demagnetizing switch unit is connected with the second output end of the driving unit, and the output end of the charging and demagnetizing switch unit is connected with the first input end of the polarity conversion switch unit and is used for realizing the on and off of the switch according to the driving signal of the driving unit, so that the function selection of the charging control or the demagnetizing control is realized; the second input end of the polarity conversion switch unit is connected to the third output end of the driving unit and is used for switching on and off the switch according to the driving signal of the driving unit, so that the polarity of the magnetizing and demagnetizing magnetic field is switched.
Further, the main discharge switch is a thyristor switch T.
Further, the magnetizing and demagnetizing switch comprises a mechanical isolating switch S p3 And a diode; the mechanical isolating switch S p3 The diode is connected in series and then connected with the thyristor switch T in parallel; when the switch is closed, the switch is in demagnetizing mode, and when the switch is opened, the switch is in magnetizing mode.
Further, the polarity transfer switch includes: two three-pole single-throw mechanical disconnecting switches S p1 And S is p2 Mechanical disconnecting switch S p1 And S is p2 Connected in series with the main thyristor switch T and having an outlet connected to the magnetizing/demagnetizing coil, and when in operation, when S is closed p1 In the positive polarity magnetizing and demagnetizing direction, when S is closed p2 The negative polarity is charged and demagnetized by switching S p1 And S is p2 The state of the switch realizes the switching of the magnetizing and demagnetizing polarity.
Through the technical scheme, compared with the prior art, the invention has the technical effects that:
(1) The invention is connected with the automatic control polarity transfer switch between the power supply and the magnetizing coil, the bidirectional switch can enable the circuit to generate unidirectional pulse current required by magnetizing and oscillation damping pulse current required by demagnetizing, and the automatic control polarity transfer switch can realize the automatic switching of the magnetic field direction of the magnetizing coil, thereby realizing the continuous magnetizing and demagnetizing of a plurality of alternating magnetic poles. The invention is beneficial to solving the problem of difficult magnetizing and demagnetizing of large-scale permanent magnet equipment, can improve magnetizing and demagnetizing efficiency and reduce the assembly and maintenance cost of the permanent magnet equipment.
(2) According to the invention, the safety and stability of the system are improved by optimizing the circuit topology, and the control switch is added in the system, so that the system can respectively generate a single pulse magnetic field waveform for magnetizing and an oscillation pulse magnetic field waveform for demagnetizing, and the functions of magnetizing, demagnetizing and polarity conversion are integrated for the first time, thereby greatly improving the functions and efficiency of the magnetizing and demagnetizing equipment.
(3) Compared with the conventional magnetizing method, the magnetizing effect of the integral magnetizing and demagnetizing integrated system of the permanent magnet equipment is improved, the magnetic steel is not provided with magnetism, so that the magnetic pole reinforcing structure can be simplified, the installation position error caused by repulsive force between the magnetic steels after magnetizing is avoided, the production efficiency, the magnetic pole consistency and the residual magnetic quality are improved effectively compared with the traditional permanent magnet motor after magnetizing, and meanwhile, the system can be used for machining nonmagnetic magnetic steel after the magnetic steel is assembled, and the assembly precision is also improved greatly.
(4) The integrated system for magnetizing and demagnetizing the permanent magnet equipment can generate a magnetizing magnetic field with adjustable amplitude and action range, and the maximum action range of the magnetic field exceeds 1.5 meters, so that the integrated system can be used for magnetizing a small-power permanent magnet motor with smaller magnetic steel size, can also be used for integrally magnetizing the rotor magnetic pole of a permanent magnet wind driven generator with larger magnetic steel size, has wide application range and has better economic benefit.
(5) The invention has high integration level, can automatically control and switch magnetizing polarity, effectively improves magnetizing efficiency, can magnetize the magnetic steel after being installed in place, simplifies a magnetic pole reinforcing structure without magnetic assembly, and greatly improves assembling efficiency. And the assembly can be machined after the assembly is completed, and the method has important significance for magnetizing a complex magnetic steel structure.
Drawings
FIG. 1 is a schematic block diagram of an integrated system for magnetizing and demagnetizing a permanent magnet device according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a magnetizing and demagnetizing switch module in the permanent magnet device integrated system provided by the embodiment of the invention;
FIG. 3 is a schematic block diagram of a switch unit in a magnetizing and demagnetizing switch module according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a driving unit in the magnetizing/demagnetizing switch module according to the embodiment of the present invention;
fig. 5 is a specific circuit diagram of an integrated system for magnetizing and demagnetizing a permanent magnet device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the invention, an automatic control polarity transfer switch is connected between the power supply and the magnetizing coil, and the automatic switching of the polarity transfer switch is controlled by the control system, so that the automatic switching of the magnetic field direction of the magnetizing coil is realized, and the continuous magnetization or demagnetization of a plurality of alternating magnetic poles of the permanent magnet equipment is realized. The main discharge switch of the discharge circuit is a bidirectional thyristor switch, the discharge switch is set as a unidirectional switch when magnetizing, the system can generate unidirectional pulse current, the discharge switch is set as a bidirectional switch when demagnetizing, and the system can generate bidirectional oscillation damping pulse current.
The permanent magnet equipment integral magnetizing and demagnetizing integrated system provided by the invention can realize integration of a magnetizing system and a demagnetizing system. Specifically, as shown in fig. 1, the permanent magnet device integrated system for magnetizing and demagnetizing includes: the device comprises a main control module 1, a charging module 2, an energy storage module 3, a charging and demagnetizing switch module 4, a charging and demagnetizing coil 5 and an energy release module 6; the main control module 1 is connected with the charging module 2, the energy storage module 3 and the charging and demagnetizing switch module 4, and the main function of the main control module 1 is control and communication, so that man-machine interaction is realized; the charging module 2 is mainly connected with the energy storage module 3, and has the functions of charging the energy storage module and storing electric energy into a capacitor, the energy storage module 3 is mainly composed of an energy storage capacitor bank and is respectively connected with the charging and demagnetizing switch module 4 and the energy discharging module 6, the energy discharging module 6 mainly has the function of safely releasing the energy in the energy storage module 3 when the charging and demagnetizing operation is canceled and the system fails to discharge, and the charging and demagnetizing switch module 4 is connected with the energy storage module 3 and the charging and demagnetizing coil 5 and has the function of releasing the energy stored by the energy storage module 3 onto the charging and demagnetizing coil 5 so as to generate a magnetic field required by charging and demagnetizing; the magnetizing/demagnetizing coil 5 is mainly connected with the magnetizing/demagnetizing switch module 4, and generates a sinusoidal single-pulse magnetic field required for magnetizing when the magnetizing/demagnetizing switch is closed, and generates a sinusoidal oscillation damping pulse magnetic field required for demagnetizing when the magnetizing/demagnetizing switch is opened.
The main control module 1 comprises a local control module and upper computer control software, wherein the local control module refers to a control cabinet installed on equipment, can check and operate the states of all switches on the equipment, is connected with the upper computer control software through optical fiber communication, and is installed on a remote computer, so that personnel and the equipment keep a safe distance, and all operations of the local control module can be realized on the upper computer control software.
The charging module 2 is used for charging the energy storage module to supplement the energy consumption of each charging and demagnetizing. The charging module 2 converts the input three-phase 380V alternating current into direct current to charge the rear-stage energy storage module, and reliable energy conversion support is provided for the stable operation of the rear-stage equipment.
The energy storage module 3 mainly comprises a high-performance self-healing energy storage capacitor, specifically, the energy storage energy is improved by adopting a mode that a plurality of capacitors are connected in parallel, the highest single-time storable energy is 2MJ, the system can select the energy according to the magnetizing and demagnetizing requirements, for example, for magnetic steel with a magnetic field saturation of 3T, a magnetizing magnetic field can be set in upper computer control software to be 3T, and the system can automatically calculate the required energy and discharge the required energy to a magnetizing coil to complete magnetizing or demagnetizing after charging and energy storage.
The charging and demagnetizing switch module 4 mainly comprises a driving unit 41, a switch unit 42 and a filtering unit 43, wherein the driving unit mainly comprises a photoelectric conversion module and a communication module, the functions are communication and signal control, the switch unit 42 mainly comprises a main discharging switch 421, a charging and demagnetizing switch 422 and a polarity conversion switch 423, the three switches are respectively connected with the driving unit, the signals and states of the three switches are controlled by the driving unit, the main discharging switch is a thyristor switch, the charging and demagnetizing switch is formed by a mechanical isolating switch and a diode, when the charging and demagnetizing switch is closed, the system is in a demagnetizing mode, and when the charging and demagnetizing switch is opened, the system is in a magnetizing mode; the polarity conversion switch is a double-pole double-throw mechanical isolating switch, and can switch the polarity of charging and demagnetizing. The system can realize a magnetizing mode, a demagnetizing mode and pole overturning of the magnetizing coil through different modes of the switch units in the magnetizing and demagnetizing switch module. The system integrates the magnetizing and demagnetizing switch to ensure that the magnetizing and demagnetizing efficiency is higher and the functions are more perfect.
The magnetizing and demagnetizing coil 5 is mainly used for generating a unidirectional pulse magnetic field and an oscillation damping pulse magnetic field required for magnetizing and demagnetizing a uniform acting region.
The energy release module 6 is mainly used for releasing the energy stored by the system through the module when the system operation is terminated, so as to ensure the stability and safety of the system.
In the embodiment of the present invention, the main discharge switch 421 in the charge/demagnetization switch module 4 adopts a bidirectional thyristor switch, the discharge switch is set as a unidirectional switch during magnetization, the system can generate unidirectional pulse current, the discharge switch is set as a bidirectional switch during demagnetization, the system can generate bidirectional oscillation damping pulse current, that is, the system can generate unidirectional pulse current required by magnetization and oscillation damping pulse current required by demagnetization.
Fig. 2 shows a schematic block diagram of a magnetizing and demagnetizing and discharging module, and the magnetizing and demagnetizing switch module 4 includes: a driving unit 41, a switching unit 42, and a filtering unit 43 connected in this order;
the driving unit 41 mainly comprises a driving circuit of the switch, and is communicated and controlled with the main control module through an optical fiber and a signal cable, and when the main control module sends out a signal, the driving unit converts the main control module into a control signal of the switch;
the switch unit 42 mainly comprises a main discharge switch, a charging and demagnetizing switch and a polarity conversion switch, wherein the main discharge switch and the polarity conversion switch are in series connection and in parallel connection, and the system can realize a magnetizing mode, a demagnetizing mode and magnetic pole overturning of a magnetizing coil through different modes of the switch unit in the charging and demagnetizing switch module;
the filtering unit 43 is connected to the rear of the charge/demagnetizing and discharging module, and mainly functions to filter and ensure the stability of the charge/demagnetizing field.
Fig. 3 shows a functional block diagram of a switching unit 42, the switching unit 42 comprising: a main discharge switch 421, a charge/demagnetization switch 422, and a polarity conversion switch 423; the main discharge switch 421 is formed by serially connecting a plurality of light triggering thyristors, and when the charging and demagnetizing switch 422 is opened, the system generates unidirectional pulse current to be in a magnetizing mode; when the charge/demagnetization switch 422 is closed, the system generates pulse current with bidirectional oscillation damping, and the pulse current is in a demagnetization mode; and the polarity switch 423 is used to switch the direction of the magnetized magnetic pole.
Fig. 4 shows a functional block diagram of a driving unit 41, the driving unit 41 comprising: a switch driving shaft 411, a gear motor 412, a controller 413, and a photoelectric conversion 414; the output signal of the controller 413 is connected to a control switch signal of the gear motor 412 to control the forward and reverse rotation and the rotation angle of the gear motor 412, and the output end of the gear motor 412 is connected to the switch driving shaft 411 to realize the switching of the switch, and meanwhile, whether the motor is blocked or not is identified according to a current feedback signal sent by a current sensor in the controller 413, so that the motor is prevented from being damaged due to overcurrent. The input end of the photoelectric conversion 414 is connected to the main control module 1, and after the light control signal sent by the main control module 1 is input to the photoelectric conversion module 414 to be converted into an electric signal, the electric signal is input to the controller 413 to realize the driving control of the switch.
Fig. 5 shows a schematic circuit diagram of a large-scale permanent magnet equipment magnetizing and demagnetizing integrated system according to an embodiment of the present invention, wherein the system mainly comprises a charging module, an energy discharging module, an energy storage module, a magnetizing and demagnetizing switch module and a magnetizing coil, and the energy discharging module is connected in series between the charging module and the energy storage moduleThe charging loop is powered by AC380V/50Hz, the charging module is respectively connected with the energy discharging resistors R1 and R2 in series to the energy storage capacitor C through the outlet relays Relay1 and Relay2, the charging module can be protected, the outlet of the charging module is connected with a Relay Relay3 in parallel, and the energy discharging of the energy storage module can be realized at any time by closing the switch. The energy storage loop is connected to the switch system through the inductor L, and the switch system and the filter loop are connected to the magnetizing coil M 1 The method comprises the steps of carrying out a first treatment on the surface of the The inductor L is used for protecting the capacitor of the energy storage module from over-voltage and over-current, the filtering loop is used for absorbing peak voltage during discharging, so that the generated magnetic field waveform is smoother, S P1 And S is P2 For polarity-switching, when the system is applied to multipole continuous magnetizing and demagnetizing of permanent magnet equipment, S is controlled by a control system P1 And S is P2 The automatic switching of the magnetizing field direction is realized. S is S P3 For the magnetizing and demagnetizing change-over switch, the diode is connected in series and then connected in parallel with the thyristor T, when S P3 When closed, the system is in demagnetizing mode, when S P3 When opened, the system is in a magnetizing mode. Through the mutual matching of all modules of the system and the optimization of circuit topology, the stability of the system is greatly improved, and through the combination and automatic control of the switch modules, the functions of the system are greatly improved.
The working process of the permanent magnet equipment integral magnetizing and demagnetizing integrated system provided by the embodiment of the invention comprises the following steps:
(1) The energy charging process comprises the following steps:
the main control module closes the outlet relays Relay1 and Relay2, opens the energy release switch Relay3, charges the energy storage capacitor, and opens the outlet relays Relay1 and Relay2 after the energy storage capacitor is full.
(2) The discharging process comprises the following steps:
magnetizing mode: closure S P1 Disconnect S P3 The main discharge switch T is triggered, and the unidirectional conductivity of the thyristor causes the magnetizing and demagnetizing switch module to be in a unidirectional mode, so that the current released from the positive electrode of the energy storage capacitor can flow unidirectionally in the circuit, and the magnetizing coil can generate unidirectional pulse magnetic field to act on equipment to be magnetized, thereby realizing the purpose of magnetizing.
Demagnetizing mode: closure S P1 Close S P3 The main discharging switch T is triggered, and due to the combined action of the main discharging switch and the anti-parallel diode, the charging and demagnetizing switch module is in a bidirectional mode, and current released by the energy storage capacitor can flow in the circuit in a bidirectional mode, so that the energy storage capacitor is in a discharging-charging-discharging cycle process, and due to the resistance energy consumption in the circuit, a sine wave magnetic field with amplitude decaying exponentially can be generated by the magnetizing coil to act on equipment to be magnetized, and the purpose of demagnetizing is achieved.
In the existing magnetizing technical scheme, since the magnetic steels of the permanent magnet equipment are alternately arranged according to different polarities, when the permanent magnet equipment is magnetized, the polarities of the magnetic steels to be magnetized or the polarities of the magnetizing coils are required to be frequently switched manually so as to meet the magnetizing requirement of the permanent magnet equipment. The invention provides an automatic control magnetic field reversing method of a magnetizing system, which is used for realizing continuous magnetization or demagnetization of a plurality of alternating magnetic poles of permanent magnet equipment;
the method comprises the following steps: automatic control polarity change-over switch S connected between power supply and magnetizing coil P1 And S is P2 The automatic control program is input into the main control module, the main control module is controlled by a remote computer to run the automatic control program, a control signal is sent out, the automatic switching of the polarity transfer switch is controlled, the automatic switching of the magnetic field direction of the magnetizing coil is realized, and the continuous magnetizing or demagnetizing of a plurality of alternating magnetic poles of the permanent magnet equipment is realized.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (5)
1. An integrated system for the integral magnetization and demagnetization of permanent magnet equipment, which is characterized by comprising: the device comprises a main control module (1), a charging module (2), an energy storage module (3), a charging and demagnetizing switch module (4) and a charging and demagnetizing coil (5);
the input end of the charging module (2) is connected to the output end of the main control module (1), the output end of the charging module (2) is connected to the second input end of the energy storage module (3), and the charging module (2) is used for charging the energy storage module (3) according to a charging control signal of the main control module (1);
the first input end of the energy storage module (3) is connected to the output end of the main control module (1), and the energy storage module (3) is used for storing electric energy;
the first input end of the magnetizing and demagnetizing switch module (4) is connected to the output end of the main control module (1), the second input end of the magnetizing and demagnetizing switch module (4) is connected to the first output end of the energy storage module (3), and the magnetizing and demagnetizing switch module (4) is used for realizing switching among a magnetizing mode, a demagnetizing mode and a magnetic pole overturning mode according to a magnetizing and demagnetizing control signal of the main control module (1);
the input end of the magnetizing and demagnetizing coil (5) is connected to the output end of the magnetizing and demagnetizing switch module (4), and the magnetizing and demagnetizing coil (5) is used for generating unidirectional pulse magnetic fields and oscillation attenuation pulse magnetic fields required by magnetizing and demagnetizing of a uniform action area according to the output of the magnetizing and demagnetizing switch module (4);
the magnetizing and demagnetizing switch module (4) comprises a driving unit (41), a switch unit (42) and a filtering unit (43) which are sequentially connected;
the driving unit (41) is used for realizing switch driving and state feedback of the switch unit (42);
the switch unit (42) is used for realizing the selection or switching of magnetizing control, demagnetizing control or polarity switching control;
the filtering unit (43) is used for filtering the switch control signal output by the switch unit (42) and the state feedback signal output by the driving unit (41);
the switching unit (42) includes: a main discharge switch (421), a charge/demagnetization switch (422) and a polarity conversion switch (423);
the main discharge switch (421) is a bidirectional thyristor switch T;
the magnetizing and demagnetizing switch (422) comprises a mechanical isolating switch S p3 And a diode; the mechanical isolating switch S p3 The diode is connected in series and then connected with the bidirectional thyristor switch T in parallel;
the polarity conversion switch (423) includes: two three-pole single-throw mechanical disconnecting switches S p1 And S is p2 When closing S p1 The positive polarity charging and demagnetizing direction is adopted, and the mechanical isolating switch S p1 Is connected in series with a bi-directional main thyristor switch T, and the outlet is connected to the magnetizing/demagnetizing coil when S is closed p2 When the magnetic switch is in a negative polarity magnetizing and demagnetizing direction, the mechanical isolating switch S p2 Is connected in series with the bi-directional main thyristor switch T and the outlet is connected to the magnetizing and demagnetizing coil.
2. The integrated system for the integral magnetizing and demagnetizing of the permanent magnet equipment according to claim 1, further comprising an energy release module (6), wherein an input end of the energy release module (6) is connected to a second output end of the energy storage module (3), and the energy release module (6) is used for safely releasing energy in the energy storage module (3) when the current magnetizing and demagnetizing operation is canceled or when a system fault cannot be discharged.
3. The integrated system for the integral magnetizing and demagnetizing of permanent magnet equipment according to claim 1,
the input end of the main discharging switch (421) is connected to the first output end of the driving unit (41) and is used for realizing the opening or closing of the switch according to the driving signal of the driving unit (41) and releasing the energy of the energy storage module to the magnetizing and demagnetizing coil to generate a magnetic field;
the first input end of the charging and demagnetizing switch (422) is connected to the output end of the main discharging switch (421), the second input end of the charging and demagnetizing switch (422) is connected with the second output end of the driving unit (41), and the output end of the charging and demagnetizing switch (422) is connected with the first input end of the polarity converting switch (423) and is used for realizing the on and off of the switch according to the driving signal of the driving unit (41), so that the function selection of the charging control or the demagnetizing control is realized;
the second input end of the polarity conversion switch (423) is connected to the third output end of the driving unit (41) and is used for switching on and off the switch according to the driving signal of the driving unit (41), so that the polarity of the magnetizing and demagnetizing magnetic field is switched.
4. The integrated system for the integral charge and demagnetization of the permanent magnet equipment according to claim 1, wherein the main discharge switch (421) is in a demagnetizing mode when being closed and in a magnetizing mode when being opened when being operated.
5. The integrated system for the integral magnetization and demagnetization of a permanent magnet device according to claim 1, characterized in that, when the polarity switch (423) is operated, by switching S p1 And S is p2 The state of the switch realizes the switching of the magnetizing and demagnetizing polarity.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105425175A (en) * | 2015-12-08 | 2016-03-23 | 云南电力试验研究院(集团)有限公司 | Iron core remanent magnetism elimination and measurement method based on polarity-reversal DC voltage source |
| CN107422165A (en) * | 2017-06-09 | 2017-12-01 | 盐城工学院 | The closed-loop Hall current sensor that can be demagnetized online |
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| CN104752016B (en) * | 2013-12-30 | 2017-02-08 | 沈阳新松机器人自动化股份有限公司 | Device and method for automatic magnetizing and demagnetizing of electromagnetic type residual current operated circuit-breaker |
| CN212518546U (en) * | 2020-08-12 | 2021-02-09 | 中国电子科技集团公司第九研究所 | Intelligent magnetizing apparatus circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105425175A (en) * | 2015-12-08 | 2016-03-23 | 云南电力试验研究院(集团)有限公司 | Iron core remanent magnetism elimination and measurement method based on polarity-reversal DC voltage source |
| CN107422165A (en) * | 2017-06-09 | 2017-12-01 | 盐城工学院 | The closed-loop Hall current sensor that can be demagnetized online |
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