CN114171349A - A-type electromagnetic leakage circuit breaker - Google Patents
A-type electromagnetic leakage circuit breaker Download PDFInfo
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- CN114171349A CN114171349A CN202010947041.7A CN202010947041A CN114171349A CN 114171349 A CN114171349 A CN 114171349A CN 202010947041 A CN202010947041 A CN 202010947041A CN 114171349 A CN114171349 A CN 114171349A
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- electromagnetic
- tripper
- circuit breaker
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- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000004804 winding Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Breakers (AREA)
Abstract
The invention relates to an A-type electromagnetic residual current circuit breaker, which is characterized by comprising: the electromagnetic tripper comprises a base, a zero sequence current transformer, a tripper actuating mechanism, a rectification compensation unit, an electromagnetic tripper, a shell cover, the zero sequence current transformer, the tripper actuating mechanism, the rectification compensation unit and the electromagnetic tripper, wherein the zero sequence current transformer, the tripper actuating mechanism, the rectification compensation unit and the electromagnetic tripper are arranged on the base in a matched mode. The electromagnetic release is used as an intermediate mechanism, the rectification compensation unit is arranged, the mechanism is released to disconnect a power supply when leakage current occurs, a switch electromagnetic element has strong anti-interference performance, strong overcurrent impact resistance and strong overvoltage impact resistance, an auxiliary power supply is not needed, the cost is saved, the leakage sinusoidal alternating current and the pulsating direct current which are suddenly applied or slowly increased can ensure reliable action, the safety and the reliability can be greatly improved, and the electromagnetic A-type leakage is also the trend and the direction for use in the future.
Description
Technical Field
The invention relates to the technical field of leakage protection switches, in particular to an A-type electromagnetic leakage circuit breaker.
Background
With the continuous improvement of the life quality of people, electronic and electric products enter thousands of households, the safety awareness of protecting the human body and equipment is gradually strengthened, and the requirements on various protection switches are also continuously improved. The leakage protection switch used in the current market is divided into an electronic type and an electromagnetic type, wherein the electronic leakage switch takes a transistor amplifier as an intermediate mechanism, when leakage occurs, the leakage is amplified by the amplifier and then transmitted to a relay, the relay controls the switch to disconnect the power supply, but the transistor has weak impact resistance and poor environmental interference resistance, an auxiliary working power supply (the electronic amplifier generally needs a direct current power supply of more than ten volts) is needed, and the leakage characteristic is influenced by the fluctuation of working voltage; when the main circuit is out of phase, the protector loses the protection function.
At present, most of electronic or electromagnetic electric appliances in the market are AC type, but for common electric appliances in life, such as notebook computers, tablet computers, mobile phones, microwave ovens, electromagnetic ovens, refrigerators, washing machines, air conditioners and the like, which easily cause pulsating direct current residual current components, especially for the existing emerging charging pile technology, the detection requirement for electric leakage is also improved, because the electric leakage signal not only has AC type but also has pulsating direct current type, and the conventional AC type electric leakage protector cannot detect the pulsating direct current type electric leakage signal, so that the personal safety of users or the safety of the appliances are seriously affected.
At present, the conventional small A-type electromagnetic leakage (residual current is less than or equal to 0.05A) on the market can only be 63A, so that the using place and market competitiveness of the circuit breaker are severely limited, and particularly the using place with the rated current reaching 100A is provided. The small-sized A-type electromagnetic leakage 100A (residual current is less than or equal to 0.05A) product in the market at present has the problems that reclosing cannot be carried out and the tripping performance is unstable due to insufficient remanence of an electromagnetic release.
Thus, significant advances in the art are needed.
Disclosure of Invention
The invention provides an A-type electromagnetic leakage circuit breaker, aiming at the defects of the prior art, which aims to solve the technical problem that the small A-type electromagnetic leakage circuit breaker 100A (the product has the defects of incapability of closing a switch, unstable tripping performance and the like due to the fact that the remanence of an electromagnetic release is insufficient) in the market at present, and comprises a base, a zero-sequence current transformer, a release executing mechanism, a rectification compensation unit, an electromagnetic release, a shell cover matched with the base, the zero-sequence current transformer, the release executing mechanism, the rectification compensation unit and the electromagnetic release, wherein the zero-sequence current transformer, the release executing mechanism, the rectification compensation unit and the electromagnetic release are electrically connected.
Preferably, the rectification compensation unit comprises a capacitor C1, a capacitor C2, a diode D1 and a diode D2, wherein the cathode of the capacitor C1 is connected with the anode of a capacitor C2, the cathode of a diode D1 and the anode of a diode D2, and the cathode of the capacitor C2 is connected with the anode of a diode D1 and the cathode of a diode D2.
Preferably, the zero sequence current transformer is uniformly wound by copper wires with the wire diameter of 0.2mm-0.4 mm.
Preferably, the zero sequence current transformer is uniformly wound by 16-36 turns of copper wires.
Preferably, the zero sequence current transformer is provided with a through brush wire.
Preferably, the zero sequence current transformer is uniformly wound by copper wires with the wire diameter of 0.3 mm.
Preferably, the zero sequence current transformer is uniformly wound by 26-turn copper wires.
Preferably, the cross-sectional area of the punching brush wire is 6mm2-10mm2。
Preferably, the diameter of the coil wire of the electromagnetic release is 0.08mm-0.14 mm.
Preferably, the number of turns of the coil is 650-800 turns.
The A-type electromagnetic residual current circuit breaker has the following beneficial effects: the electromagnetic release is used as an intermediate mechanism, the rectification compensation unit is arranged, the mechanism is released to disconnect a power supply when leakage current occurs, a switch electromagnetic element has strong anti-interference performance, strong overcurrent impact resistance and strong overvoltage impact resistance, an auxiliary power supply is not needed, the cost is saved, the leakage sinusoidal alternating current and the pulsating direct current which are suddenly applied or slowly increased can ensure reliable action, the safety and the reliability can be greatly improved, and the electromagnetic A-type leakage is also the trend and the direction for use in the future.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is an exploded view of an a-type electromagnetic residual current circuit breaker according to the present invention;
fig. 2 is a circuit diagram of a rectification compensation unit in the a-type electromagnetic residual current circuit breaker according to the present invention;
fig. 3 is a schematic diagram of a coil winding structure in an electromagnetic release in an a-type electromagnetic residual current circuit breaker according to the present invention;
fig. 4 is a schematic diagram illustrating the connection between the rectification compensation unit and the electromagnetic release in the a-type electromagnetic residual current circuit breaker according to the present invention;
FIG. 5 is a schematic diagram of an A-type electromagnetic residual current circuit breaker according to the present invention;
fig. 6 is a schematic diagram of the signal trend of the a-type electromagnetic residual current circuit breaker according to the present invention.
In the figure, 1-base, 2-zero sequence current transformer, 3-release actuator, 4-rectification compensation unit, 5-electromagnetic release, 6-cover, 7-coil, 8-capacitor C1 and C2, 9-secondary tube D1 and D2.
Detailed Description
Fig. 1 is an exploded view of an a-type electromagnetic residual current circuit breaker according to the present invention; fig. 2 is a circuit diagram of a rectification compensation unit in the a-type electromagnetic residual current circuit breaker according to the present invention; fig. 3 is a schematic diagram of a coil winding structure in an electromagnetic release in an a-type electromagnetic residual current circuit breaker according to the present invention; fig. 4 is a schematic diagram of the connection between the rectification compensation unit and the electromagnetic release in the a-type electromagnetic residual current circuit breaker according to the present invention. Referring to fig. 1-4, in the a-type electromagnetic residual current circuit breaker according to the first embodiment of the present invention, at least, the a-type electromagnetic residual current circuit breaker includes a base 1, a zero sequence current transformer 2 disposed on the base, a trip actuator 3, a rectification compensation unit 4, an electromagnetic trip 5, a case cover 6 configured to the base 1, the zero sequence current transformer 2, the trip actuator 3, the rectification compensation unit 4, and the electromagnetic trip 5, which are electrically connected to each other.
The rectification compensation unit comprises a capacitor C1, a capacitor C2 (8 in the figure), a diode D1 and a diode D2 (9 in the figure), wherein the cathode of the capacitor C1, the anode of the capacitor C2, the cathode of the diode D1 and the anode of the diode D2 are welded to a point A, the cathode of the capacitor C2, the anode of the diode D1 and the cathode of the diode D2 are welded to a point C, and the anode of the capacitor C1 is welded to a point B. The capacitor C1 can be any one of the models of 15uF/6.3v, 33uF/6.3v and 68uF/6.3v, and the capacitor C2 can be any one of the models of 15uF/6.3v, 33uF/6.3v and 68uF/6.3 v. The compensation capacitors C1 and C2 can form series resonance with the secondary winding, and make the secondary winding current present capacitive current, which has magnetic assisting effect, the compensation capacitors C1 and C2 can not only improve the sensitivity of the transformer, but also have strong inhibiting effect on harmonic signal, pulse interference and other interference, and the diodes D1 and D2 provide voltage limiting protection for rectification and rectification. The models of the diodes D1 and D2 can be selected from any one of 1N4448W, BAV16W, BAV19W, BAV20W, BAV21W and MMSD 914. The specific types of the capacitor C1, the capacitor C2, the diode D1 and the diode D2 can be selected according to actual needs, and the specific types of the capacitor C1, the capacitor C2, the diode D1 and the diode D2 are not limited herein.
In specific implementation, the zero sequence current transformer 2 can be uniformly wound by 16-36 turns of copper wire with the wire diameter of 0.2-0.4 mm. The zero sequence current transformer 2 is provided with a through brush wire with the cross section area of 6mm2-10mm2。
The zero sequence current transformer 2 mainly functions to convert leakage current of a primary circuit into output potential of a secondary circuit, the number of turns of the primary circuit with smaller rated residual current (less than or equal to 0.05A) generally adopts 2-3 turns, the more primary windings, the higher secondary induction output potential, and the more stable tripping performance of the circuit breaker. When the rated current is as high as 100A, the number of turns of the primary loop is limited by temperature rise and the internal space structure of the miniature circuit breaker, and only a straight-through type can be adopted, the number of turns of the primary loop cannot be increased, and the increase of the iron core section, the reduction of the magnetic path length and the like are limited by the geometric dimension and only slightly changed, so that the zero-sequence current transformer, the rectification compensation unit and the electromagnetic release are re-matched according to the comprehensive consideration of the existing leakage shell structure to achieve the purpose of improving the detection sensitivity.
For the type a zero-sequence current transformer, the zero-sequence current transformer should be made of a material with small coercive force and high magnetic permeability, and in the embodiment, the ratio of direct current output to alternating current output of iron-based nanocrystalline (1K107A) secondary induction output potential under the condition of the same input current tends to 1. Selecting the number of secondary turns: in the trial assembly of the selected number of turns of the electromagnetic release and the capacitance parameter impedance ratio of the rectification compensation unit, the number of turns of the secondary output induction line is continuously adjusted to select the optimal working point of the zero sequence current transformer in the magnetization curve, and in the embodiment, 26 turns of 0.3mm copper wires are uniformly wound around the zero sequence current transformer. For the straight-through brush wire, the cross section area is 8mm2To meet the requirement of temperature rise.
In specific implementation, the electromagnetic release 5 can adopt the coil wire diameter of 0.08-0.14 mm and the coil turns of 650-800 turns. In this embodiment, the electromagnetic release 3 has a coil diameter of 0.11mm and a number of turns of 650-800 turns, and the specific control contrast parameters include coil impedance, resistance value, and stability of the release current.
When the circuit breaker is specifically implemented, the tripping execution and reset process of the circuit breaker can comprise a magnetic flux converter, a tripping output device, a fault indication device, a mechanism locking device, a tripper armature resetting device and a lever, wherein the armature pushes the tripping output device through a signal of the magnetic flux converter, and the tripping output device carries out opening operation on the mechanism locking device; the fault indicating device is linked with the tripping output device, the fault indicating device is linked with the lever, and the lever triggers a mechanism locking device to output a corresponding on-off signal in the linked rotation process; the armature resetting device is linked with the lever and the mechanism locking device respectively and can rotate around the rotation center of the lever and reset the armature while rotating, and in the process, the corresponding locking device is triggered to output corresponding tripping and resetting signals.
FIG. 5 is a schematic diagram of an A-type electromagnetic residual current circuit breaker according to the present invention; fig. 6 is a schematic diagram of the signal trend of the a-type electromagnetic residual current circuit breaker according to the present invention. As shown in fig. 5-6, in a normal circuit, the magnetic fields generated by the primary side (primary side) current of the zero-sequence current transformer in the iron core thereof cancel each other, so that the secondary side (secondary side) has no induced potential, and therefore, no current is generated in the demagnetizing coil of the polarized electromagnet of the electromagnetic release. Under the condition, the attraction force of the polarized electromagnet of the electromagnetic release overcomes the pulling force of a reaction spring to attract the armature iron at the closed position, thereby switching on the A-type electromagnetic leakage circuit breaker.
When the power receiving equipment leaks electricity, the zero sequence current transformer senses that the current is unbalanced, a secondary side coil generates corresponding induced potential, and a signal generated after compensation is carried out through a circuit board capacitor is sent to the electromagnetic release. Thus, the demagnetization coil of the polarized electromagnet of the electromagnetic release generates current, thereby generating alternating magnetic flux. This magnetic flux weakens the attractive force of the polarized electromagnet. When the signal generated by the secondary side is equal to or greater than a preset value, the attraction force of the polarized electromagnet is smaller than the pulling force of the reaction spring, and the armature is released. The action mandril connected with the armature iron pushes the tripping actuating mechanism to act rapidly, so that the A-type electromagnetic leakage circuit breaker is disconnected and the power supply is cut off.
Through the design of the above embodiment, the invention has the beneficial effects that: the electromagnetic release is used as an intermediate mechanism, the rectification compensation unit is arranged, the mechanism is released to disconnect a power supply when leakage current occurs, a switch electromagnetic element has strong anti-interference performance, strong overcurrent impact resistance and strong overvoltage impact resistance, an auxiliary power supply is not needed, the cost is saved, the leakage sinusoidal alternating current and the pulsating direct current which are suddenly applied or slowly increased can ensure reliable action, the safety and the reliability can be greatly improved, and the electromagnetic A-type leakage is also the trend and the direction for use in the future.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An a-type electromagnetic residual current circuit breaker, comprising: the electromagnetic tripper comprises a base, a zero sequence current transformer, a tripper actuating mechanism, a rectification compensation unit, an electromagnetic tripper, a shell cover, the zero sequence current transformer, the tripper actuating mechanism, the rectification compensation unit and the electromagnetic tripper, wherein the zero sequence current transformer, the tripper actuating mechanism, the rectification compensation unit and the electromagnetic tripper are arranged on the base in a matched mode.
2. An electromagnetic leakage breaker of type a as claimed in claim 1, characterized in that said rectifying compensation unit comprises a capacitor C1, a capacitor C2, a diode D1, a diode D2, wherein the cathode of said capacitor C1 is connected to the anode of a capacitor C2, the cathode of a diode D1, and the anode of a diode D2, and the cathode of said capacitor C2 is connected to the anode of a diode D1 and the cathode of a diode D2.
3. The a-type electromagnetic residual current circuit breaker according to claim 1, characterized in that the zero sequence current transformer is uniformly wound with copper wires having a wire diameter of 0.2mm to 0.4 mm.
4. The a-type electromagnetic residual current circuit breaker according to claim 1, characterized in that the zero sequence current transformer is uniformly wound with 16-36 turns of copper wire.
5. An electromagnetic residual current circuit breaker of the type a according to claim 1, characterized in that said zero sequence current transformer is provided with a feedthrough brush wire.
6. An a-type electromagnetic residual current circuit breaker according to claim 3, characterized in that the zero sequence current transformer is uniformly wound with copper wires having a wire diameter of 0.3 mm.
7. The A-type electromagnetic residual current circuit breaker according to claim 4, characterized in that the zero sequence current transformer is uniformly wound with 26-turns of copper wire.
8. An electromagnetic residual-current circuit breaker of the type a according to claim 5, characterized in that said cross-sectional area of said feedthrough brush wire is 6mm2-10mm2。
9. An electromagnetic residual current circuit breaker of the type a according to any of the claims 1 to 8, characterized in that the electromagnetic release employs a coil wire diameter of 0.08mm-0.14 mm.
10. An a-type electromagnetic residual current circuit breaker according to claim 9, characterized in that said number of coil turns is 650-800 turns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010947041.7A CN114171349A (en) | 2020-09-10 | 2020-09-10 | A-type electromagnetic leakage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010947041.7A CN114171349A (en) | 2020-09-10 | 2020-09-10 | A-type electromagnetic leakage circuit breaker |
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| Publication Number | Publication Date |
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| CN114171349A true CN114171349A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010947041.7A Pending CN114171349A (en) | 2020-09-10 | 2020-09-10 | A-type electromagnetic leakage circuit breaker |
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| CN (1) | CN114171349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966466A (en) * | 2022-04-29 | 2022-08-30 | 河北工业大学 | Electromagnetic leakage detection circuit parameter design method and device |
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2020
- 2020-09-10 CN CN202010947041.7A patent/CN114171349A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966466A (en) * | 2022-04-29 | 2022-08-30 | 河北工业大学 | Electromagnetic leakage detection circuit parameter design method and device |
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