CN115792594B - Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay - Google Patents
Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay Download PDFInfo
- Publication number
- CN115792594B CN115792594B CN202211513998.6A CN202211513998A CN115792594B CN 115792594 B CN115792594 B CN 115792594B CN 202211513998 A CN202211513998 A CN 202211513998A CN 115792594 B CN115792594 B CN 115792594B
- Authority
- CN
- China
- Prior art keywords
- soft magnetic
- frequency
- electromagnetic relay
- magnetic material
- sealed electromagnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007885 magnetic separation Methods 0.000 title claims abstract description 16
- 239000000696 magnetic material Substances 0.000 claims abstract description 78
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000009466 transformation Effects 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 230000005415 magnetization Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 42
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 238000004458 analytical method Methods 0.000 claims description 16
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004091 panning Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a soft magnetic separation type method for improving dynamic characteristics of a sealed electromagnetic relay, which comprises the following steps: (1) Testing the coil current of the sealed electromagnetic relay to be tested under the rated voltage to obtain a coil current waveform in the process of powering on the sealed electromagnetic relay to be tested to the armature attraction; (2) Performing wavelet transformation on the coil current waveform obtained by the test, and analyzing the numerical value and time domain distribution of the high-frequency component through a wavelet transformation 'time-scale' graph; (3) Performing high-frequency test on different soft magnetic materials in different high-frequency working environments to obtain magnetization curves of the different soft magnetic materials in different high-frequency working environments, and further analyzing the influence of the high-frequency characteristics of the soft magnetic on the dynamic characteristics of the sealed electromagnetic relay to be tested; (4) Soft magnetic materials are selected that can effectively improve dynamic characteristics. The method can not only effectively improve dynamic characteristics, but also provide model selection reference for optimizing materials of sealed electrical products.
Description
Technical Field
The invention belongs to the field of electrical product design, relates to a soft magnetic separation type method, and in particular relates to a soft magnetic separation type method for improving dynamic characteristics of a sealed electromagnetic relay based on wavelet theory.
Background
The electromagnetic relay is used as a key control element in a circuit, and the on-off of a load contact is controlled through a control loop. In recent years, with the continuous development of the fields of aviation, aerospace, military and the like, the technical requirements on electromagnetic relays are increasingly improved, and the electromagnetic system is designed to meet the technical requirements of quick response, high reliability, light weight and miniaturization of the sealed electromagnetic relays for aviation, aerospace and army. The soft magnetic is used as a main part of the material type of the electromagnetic system, the advantage and the disadvantage of the material property of the soft magnetic can influence the effective circulation of magnetic flux in a magnetic circuit, and further the normal operation of the sealed electromagnetic relay is influenced, for example, the dynamic characteristic of the sealed electromagnetic relay can be influenced by the high-frequency characteristic of the magnetic material under high-frequency excitation. The novel soft magnetic material with good high-frequency characteristics is explored, the response speed of the sealed electromagnetic relay can be improved, the heating loss is reduced, and the operation efficiency is improved.
The soft magnetic materials of the traditional sealed electromagnetic relay are mostly electrical pure iron, but in practice, a series of problems are found in the sealed electromagnetic relay manufactured by the electrical pure iron: (1) The high-frequency working characteristic is poor, the response speed is slow, and the switching-on and switching-off frequency of the sealed electromagnetic relay is limited; (2) The density of the material is high, and the heating phenomenon exists, so that the technical requirements of light weight and miniaturization are not met.
Disclosure of Invention
In order to solve the defect of the traditional soft magnetic material property and realize the improvement of the dynamic property of the sealed electromagnetic relay, the invention provides a soft magnetic separation type method for improving the dynamic property of the sealed electromagnetic relay based on the basic principle of wavelet theory, which is used for optimizing the soft magnetic property of the sealed electromagnetic relay so as to meet the application requirement. The method can not only effectively improve dynamic characteristics, but also provide model selection reference for optimizing materials of sealed electrical products.
The invention aims at realizing the following technical scheme:
a soft magnetic separation method for improving dynamic characteristics of a sealed electromagnetic relay comprises the following steps:
step (1): coil current testing
Testing the coil current of the sealed electromagnetic relay to be tested under the rated voltage to obtain a coil current waveform in the process of powering on the sealed electromagnetic relay to be tested to the armature attraction;
step (2): coil amperometric analysis
Performing wavelet transformation on the coil current waveform obtained by the test, and analyzing the numerical value and time domain distribution of the high-frequency component through a wavelet transformation 'time-scale' graph;
step (3): soft magnetic high frequency test
Performing high-frequency test on different soft magnetic materials under different high-frequency working environments to obtain magnetization curves of the different soft magnetic materials under the different high-frequency working environments, and further analyzing the influence of the high-frequency characteristics of the soft magnetic on the dynamic characteristics of the sealed electromagnetic relay to be tested, wherein: the soft magnetic material is an electrical pure iron soft magnetic material, an amorphous soft magnetic material and a nanocrystalline soft magnetic material;
step (4): magnetic material selection
Selecting a soft magnetic material capable of effectively improving dynamic characteristics according to the coil current analysis result in the step (2) and the soft magnetic high-frequency test result in the step (3), wherein: the soft magnetic material is an amorphous soft magnetic material or a nanocrystalline soft magnetic material, namely: and an amorphous soft magnetic material or a nanocrystalline soft magnetic material is selected to replace an electrical pure iron soft magnetic material.
Compared with the prior art, the invention has the following advantages:
1. aiming at the current situation that the dynamic characteristics of the sealed electromagnetic relay manufactured by taking the current electrical pure iron as a soft magnetic material are poor, the invention provides the soft magnetic separation type method capable of effectively improving the dynamic characteristics of the sealed electromagnetic relay, and the product requirement of quick response of future electrical products can be met.
2. The invention fully utilizes the basic principle of wavelet theory, realizes the equalization of time domain analysis and frequency domain analysis, has high resolution in the time domain at the signal with larger correlation with time characteristics, and has high resolution in the frequency domain at the signal with larger correlation with frequency characteristics.
3. The invention tests the high-frequency characteristics of various magnetic materials and analyzes the characteristics of various magnetic materials according to the test result, thus not only embodying the completeness of the steps of the invention, but also providing a model selection reference for optimizing the materials of the sealed electrical products.
Drawings
FIG. 1 is a flow chart of a soft magnetic material selection of the present invention;
FIG. 2 is a wavelet transform schematic;
FIG. 3 is a graph of high frequency B-H of different materials obtained after soft magnetic high frequency test, a) a graph of high frequency B-H of an electrical pure iron soft magnetic material DT4C, B) a graph of high frequency B-H of an amorphous soft magnetic material 1K101, C) a graph of high frequency B-H of a nanocrystalline soft magnetic material 1K 107B;
FIG. 4 is a block diagram of an electromagnetic system of a cubic inch balanced force type sealed electromagnetic relay according to an embodiment;
FIG. 5 is a waveform diagram of a test of coil current at nominal voltage in an embodiment;
FIG. 6 is a plot of discrete wavelet transform of a coil current test waveform at nominal voltage in an embodiment;
fig. 7 is a plot of a continuous wavelet transform of a coil current test waveform at nominal voltage in an embodiment.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings, but is not limited to the following description, and any modifications or equivalent substitutions of the present invention should be included in the scope of the present invention without departing from the spirit and scope of the present invention.
The invention discovers that the coil current has two abrupt changes in the coil power-on time period and the armature attraction time period in the process of testing the coil current waveform of the sealed electromagnetic relay, but the abrupt changes are accompanied by short and irregular rapid transitions of the waveform until the waveform is gradually stable. In order to explore the influence caused by the high-frequency jump, the invention starts from wavelet analysis, combines the test result of the soft magnetic high-frequency magnetization curve, analyzes the influence of the soft magnetic high-frequency characteristic on the dynamic characteristic of the sealed electromagnetic relay, and finally provides a soft magnetic separation type method for improving the dynamic characteristic of the sealed electromagnetic relay, wherein the method comprises four steps of coil current test, coil current analysis, soft magnetic high-frequency test and magnetic material selection, as shown in figure 1, the specific steps are as follows:
step (1): coil current testing
And testing the coil current of the sealed electromagnetic relay to be tested under the rated voltage to obtain a coil current waveform in the process from the powering-on of the sealed electromagnetic relay to the actuation of the armature, and laying a cushion for the next quantitative analysis.
In this step, the electromagnetic system structure of the sealed electromagnetic relay to be measured at least includes: outer yoke, inner yoke, long yoke, iron core, coil and armature.
In this step, the sealed electromagnetic relay to be measured may be a permanent magnet-free sealed electromagnetic relay, such as a clapping type sealed electromagnetic relay; and can also be a permanent magnet sealed electromagnetic relay, such as a balance force type sealed electromagnetic relay. The common requirements to be met by the above mentioned sealed electromagnetic relay are: the coil current needs to be used as magnetic circuit excitation to drive the whole electric appliance to work.
In the step, the absorption time of the armature of the sealed electromagnetic relay to be measured is in the millisecond level, the waveform of the coil current in the process of electrifying the coil to the armature absorption under the rated voltage can be regarded as a transient step function lagging behind the coil voltage, and the coil current in the process comprises a certain high-frequency component.
Step (2): coil amperometric analysis
Wavelet transformation is carried out on the coil current waveform obtained through the test, and the numerical value and time domain distribution of the high-frequency component are analyzed through a wavelet transformation 'time-scale' diagram.
In this step, the wavelet transform is of two different types: continuous wavelet transform and discrete wavelet transform, expressed as:
wherein: psi (t) is a continuous mother wave, a is a scale factor, b is a translation factor, X (t) is a coil current waveform obtained by testing, and X ω (a, b) is a scale function obtained after wavelet transformation; for continuous wavelet transforms, the values of the scale factor and the shifting factor are continuous, meaning that there will be an infinite number of wavelets; for discrete wavelet transforms, the scale factor and the panning factor use discrete values, the power increment of scale factor a is 2 (a=1, 2,4.,) and the translation factor b increases by integer values (b=1, 2, 3).
In the step, the numerical value of the high-frequency component can be analyzed through an output wavelet transformation time-scale diagram, and the wavelet center frequency and the pseudo frequency conversion formula is as follows:
wherein: f (f) c The central frequency of the wavelet is represented, namely the test sampling frequency of the coil current waveform; f (f) a The pseudo frequency is represented, namely the numerical value of the converted high-frequency component.
In this step, for the wavelet analysis, the specific analysis steps are:
1) Local windows with different dimensions are adopted;
2) Firstly, high frequency and then low frequency are carried out, and transformation of different scales is carried out on a time domain in sequence; when a filtering decomposition method is selected for discrete wavelet analysis, the number of samples in the signal is reduced by one time in sequence at each stage of decomposition; under a lower frequency value, the characteristic information of the low-frequency component of the signal can be reflected by fewer samples, so that more sampling points are not required to be reserved in the signal, and under a higher frequency value, the characteristic information is opposite;
3) In the transformation process, for low-frequency signals, the time domain resolution is lower than the frequency domain; for high frequency signals, the time domain resolution is higher than the frequency domain;
4) Finally, the transition of mapping the one-dimensional time domain function to the two-dimensional time-scale domain is realized; the two-dimensional "time-scale" graph shows that the coil current has a significant high frequency component for the coil energization period and the armature pull-in period.
As shown in fig. 2, the wavelet transform uses windows of different sizes for time-frequency analysis. At low frequencies, i.e. lower regions, the time axis direction is wider and the frequency axis direction is narrower, indicating better resolution at the frequencies; similarly, the opposite is true at high frequencies.
Step (3): soft magnetic high frequency test
And carrying out high-frequency test on different soft magnetic materials in different high-frequency working environments to obtain magnetization curves of the different soft magnetic materials in different high-frequency working environments, and further analyzing the influence of the high-frequency characteristics of the soft magnetic on the dynamic characteristics of the sealed electromagnetic relay to be tested.
As can be seen from fig. 3, when the operating frequency is in the order of khz, the B-H curve of different soft magnets varies differently as the operating frequency increases. Wherein: the curve of the electrical pure iron soft magnetic material DT4C is very serious in rectangular shape and has coercive force H c With remanence B r Larger, and the B-H curve change of the nanocrystalline soft magnetic material 1K107B and the amorphous soft magnetic material 1K101 is smaller.
The analysis is as follows:
1) The slope of the B-H curve of the electrical pure iron soft magnetic material DT4C is larger during the coil power-up period and the armature pull-up period, which contain more high frequency components.
2) When the coil current changes, the magnetic induction intensity change amount delta B of the electrical pure iron soft magnetic material is larger under the condition that the magnetic field intensity increment delta H in the magnetic circuit is equal, so the counter electromotive force is larger. The counter electromotive force prevents the current rising trend, so that the current rising speed of the electrical pure iron soft magnetic material is slower than that of the amorphous or nanocrystalline soft magnetic material.
Step (4): magnetic material selection
Soft magnetic materials capable of effectively improving dynamic characteristics are selected, and further the soft magnetic materials are considered to be applied to the optimization design of materials of sealed electrical products, wherein: the soft magnetic material is an amorphous soft magnetic material or a nanocrystalline soft magnetic material, namely: and an amorphous soft magnetic material or a nanocrystalline soft magnetic material is selected to replace an electrical pure iron soft magnetic material.
Examples:
the embodiment provides a balanced force type electromagnetic sealing electromagnetic relay, wherein a soft magnetic material is an electrical pure iron soft magnetic material DT4C, and the sealing electromagnetic relay optimizes the soft magnetic material according to the following steps:
step (1): coil current testing
1) The electromagnetic system of the cubic inch balance force type electromagnetic sealing electromagnetic relay is shown in fig. 4, and the electromagnetic system structure comprises an outer yoke, an inner yoke, a long yoke, an iron core, a permanent magnet, a coil, an armature and the like.
2) After testing, the waveform of the coil current of the sealed electromagnetic relay under the rated voltage is shown in fig. 5. As can be seen from fig. 5, the coil current waveform during the coil-to-armature pull-in process at rated voltage can be regarded as a transient step function that lags behind the coil voltage.
Step (2); coil amperometric analysis
1) Taking the analysis speed and the calculation efficiency into consideration, loading about 20000 coil current waveform sampling points, performing discrete wavelet transformation by using a filtering decomposition method, selecting a sym3 wavelet function, setting a decomposition level as 9, and according to the signal sampling frequency of 500kHz, the high-frequency components d1-d9 and the frequency range corresponding to the low-frequency component a9 as shown in table 1.
Table 1 frequencies for components
The discrete wavelet transform results are shown in fig. 6, and the decomposition waveforms of d6-d9 show that the coil current has obvious high-frequency components in the coil power-on period and the armature attraction period.
2) And (3) writing a calculation program, performing continuous wavelet transformation on the coil current waveform, and locally amplifying a scale map near the power-on time and near the suction time to obtain a continuous wavelet transformation result as shown in fig. 7. It is observed that the coil current signal contains a component of 8kHz at the power-up time and a component of 6.8kHz at the pull-up time.
Step (3): soft magnetic high frequency test
The test result can be referred to a high-frequency B-H curve graph of different materials obtained after the soft magnetic high-frequency test provided by the method, the rectangular shape of the B-H curve of the electrical pure iron soft magnetic material DT4C is serious under the high frequency, the rising speed of the coil current is limited, and the dynamic characteristic of the sealed electromagnetic relay is influenced.
Step (4): magnetic material selection
The amorphous soft magnetic material 1K101 and the nanocrystalline soft magnetic material 1K107B are selected to replace the electrical pure iron soft magnetic material DT4C, so that the dynamic characteristics of the sealed electromagnetic relay can be effectively improved. In addition, considering that the amorphous soft magnetic material 1K101 and the nanocrystalline soft magnetic material 1K107B contain about 20% of Si element and a small amount of B element, the atomic mass of these elements is smaller than that of iron atom, and if substitution can be realized, the weight of the electromagnetic system of the sealed electromagnetic relay can be reduced by about 15% at maximum, which is beneficial to the light weight and miniaturized production of the sealed electrical product.
Claims (7)
1. The soft magnetic separation type method for improving the dynamic characteristics of the sealed electromagnetic relay is characterized by comprising the following steps of:
step (1): coil current testing
Testing the coil current of the sealed electromagnetic relay to be tested under the rated voltage to obtain a coil current waveform in the process of powering on the sealed electromagnetic relay to be tested to the armature attraction;
step (2): coil amperometric analysis
Wavelet transformation is carried out on the coil current waveform obtained by the test, the numerical value and the time domain distribution of the high-frequency component are analyzed through a wavelet transformation 'time-scale' graph, and the wavelet transformation expression is as follows:
wherein:for continuous mother wave, a is scale factor, b is translation factor, X (t) is coil current waveform obtained by test, and X ω (a, b) is a scale function obtained after wavelet transformation;
step (3): soft magnetic high frequency test
Performing high-frequency test on different soft magnetic materials under different high-frequency working environments to obtain magnetization curves of the different soft magnetic materials under the different high-frequency working environments, and further analyzing the influence of the high-frequency characteristics of the soft magnetic materials on the dynamic characteristics of the sealed electromagnetic relay to be tested, wherein: the soft magnetic material is an electrical pure iron soft magnetic material, an amorphous soft magnetic material and a nanocrystalline soft magnetic material;
step (4): magnetic material selection
Selecting a soft magnetic material capable of effectively improving dynamic characteristics according to the coil current analysis result in the step (2) and the soft magnetic high-frequency test result in the step (3), wherein: the soft magnetic material is an amorphous soft magnetic material or a nanocrystalline soft magnetic material, namely: and an amorphous soft magnetic material or a nanocrystalline soft magnetic material is selected to replace an electrical pure iron soft magnetic material.
2. The soft magnetic separation type method for improving dynamic characteristics of a sealed electromagnetic relay according to claim 1, wherein in the step (1), an electromagnetic system structure of the sealed electromagnetic relay to be tested at least comprises: the coil comprises an outer yoke, an inner yoke, a long yoke, an iron core, a coil and an armature.
3. The soft magnetic separation type method for improving the dynamic characteristics of the sealed electromagnetic relay according to claim 1, wherein in the step (1), the common requirements to be met by the sealed electromagnetic relay to be tested are: the coil current needs to be used as magnetic circuit excitation to drive the whole electric appliance to work.
4. The soft magnetic separation method for improving dynamic characteristics of a sealed electromagnetic relay according to claim 1, wherein in the step (2), the magnitude of the high frequency component is analyzed through an output wavelet transformation time-scale graph, and a wavelet center frequency and pseudo frequency conversion formula is as follows:
wherein: f (f) c The central frequency of the wavelet is represented, namely the test sampling frequency of the coil current waveform; f (f) a The pseudo frequency is represented, namely the numerical value of the converted high-frequency component; a is the scale factor.
5. The soft magnetic separation method for improving the dynamic characteristics of the sealed electromagnetic relay according to claim 1, wherein in the step (2), the specific steps of analyzing the numerical value and the time domain distribution of the high-frequency component through a wavelet transformation time-scale graph are as follows:
1) Local windows with different dimensions are adopted;
2) Firstly, high frequency and then low frequency are carried out, and transformation of different scales is carried out on a time domain in sequence;
3) In the transformation process, for low-frequency signals, the time domain resolution is lower than the frequency domain; for high frequency signals, the time domain resolution is higher than the frequency domain;
4) Finally, a transition mapping the one-dimensional time domain function to the two-dimensional "time-scale" domain is achieved.
6. The soft magnetic separation type method for improving the dynamic characteristics of the sealed electromagnetic relay according to claim 1, wherein in the step (3), the influence of the high-frequency characteristic of the soft magnetic material on the dynamic characteristics of the sealed electromagnetic relay to be tested is as follows:
1) The slope of the B-H curve of the electrical pure iron soft magnetic material is larger in the coil power-on time period and the armature sucking time period which contain more high-frequency components;
2) When the coil current changes, under the condition that the increment delta H of the magnetic field intensity in the magnetic circuit is equal, the variation delta B of the magnetic induction intensity of the electrical pure iron soft magnetic material is larger, the counter electromotive force prevents the trend of current rising, and the current rising speed of the electrical pure iron soft magnetic material is slower than that of the amorphous or nanocrystalline soft magnetic material.
7. Use of a soft magnetic separation type method according to any one of claims 1-6 for optimizing soft magnetic materials of a balanced force type sealed electromagnetic relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211513998.6A CN115792594B (en) | 2022-11-29 | 2022-11-29 | Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211513998.6A CN115792594B (en) | 2022-11-29 | 2022-11-29 | Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115792594A CN115792594A (en) | 2023-03-14 |
| CN115792594B true CN115792594B (en) | 2024-03-29 |
Family
ID=85443251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211513998.6A Active CN115792594B (en) | 2022-11-29 | 2022-11-29 | Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115792594B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116956676B (en) * | 2023-07-24 | 2024-03-29 | 哈尔滨工业大学 | Simulation analysis method for dynamic characteristics of nanocrystalline microminiature sealed electromagnetic relay |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614438A (en) * | 2004-10-22 | 2005-05-11 | 哈尔滨工业大学 | Testing method for dynamic characterist ics of electromagnetic relay |
| CN102288907A (en) * | 2011-07-06 | 2011-12-21 | 内蒙古东部电力有限公司赤峰电业局 | Comprehensive condition testing method of circuit breaker |
| CN105893701A (en) * | 2016-04-25 | 2016-08-24 | 哈尔滨工业大学 | Method for calculating dynamic characteristics of electromagnetic mechanism based on temperature compensation matrix |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2418497A1 (en) * | 2003-02-05 | 2004-08-05 | Patrick Lemieux | High performance soft magnetic parts made by powder metallurgy for ac applications |
-
2022
- 2022-11-29 CN CN202211513998.6A patent/CN115792594B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614438A (en) * | 2004-10-22 | 2005-05-11 | 哈尔滨工业大学 | Testing method for dynamic characterist ics of electromagnetic relay |
| CN102288907A (en) * | 2011-07-06 | 2011-12-21 | 内蒙古东部电力有限公司赤峰电业局 | Comprehensive condition testing method of circuit breaker |
| CN105893701A (en) * | 2016-04-25 | 2016-08-24 | 哈尔滨工业大学 | Method for calculating dynamic characteristics of electromagnetic mechanism based on temperature compensation matrix |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115792594A (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xue et al. | Analytical prediction and optimization of cogging torque in surface-mounted permanent magnet machines with modified particle swarm optimization | |
| Hasegawa | Present status of amorphous soft magnetic alloys | |
| CN115792594B (en) | Soft magnetic separation method for improving dynamic characteristics of sealed electromagnetic relay | |
| Clark et al. | Design optimisation of moving-magnet actuators for reciprocating electro-mechanical systems | |
| Ro et al. | Characteristic analysis and design of a novel permanent magnetic actuator for a vacuum circuit breaker | |
| Luo et al. | Design of end-iron-free voice coil motor with appropriate PM length ratio | |
| Khalid et al. | Design and finite element analysis of modular C-Core stator tubular linear oscillating actuator for miniature compressor | |
| Ziske et al. | Magnetic hysteresis models for modelica | |
| Kim et al. | Single-variable-input active sidelobe suppression method for synthesized magnetic field focusing technology and its optimization | |
| Aguilar et al. | Half size reduction of DC output filter inductors with the saturation-gap magnetic bias topology | |
| Roc'h et al. | Optimization of the in situ performance of common mode chokes for power drive systems using designable parameters | |
| Mrad et al. | Predicting the impact of magnetic components used for EMI suppression on the base-band of a power amplifier | |
| Yoo et al. | Investigation of vibration and acoustic noise emission of powder core inductors | |
| Hong et al. | Optimal design of a novel permanent magnetic actuator using evolutionary strategy algorithm and kriging meta-model | |
| Kim et al. | Analysis of hysteresis motor using finite element method and magnetization-dependent model | |
| Wang et al. | Dynamic performance analysis of permanent magnet contactor with a flux-weakening control strategy | |
| Nie et al. | Compensation analysis of longitudinal end effect in three‐phase switched reluctance linear machines | |
| Kawase et al. | Analysis of magnetizing process using discharge current of capacitor by 3-D finite-element method | |
| Kaku et al. | A novel prediction method of acoustic magnetic noise based on induction motor's NHCC function | |
| Austrin | On magnetic amplifiers in aircraft applications | |
| Revilla Aguilar et al. | Parametric transformer using PM‐inductors with saturation‐gap | |
| Guo et al. | Few‐sample multi‐objective optimisation of a double‐sided tubular machine with hybrid segmented permanent magnet | |
| Moses et al. | Iron losses in electrical machines excited by nonsinusoidal voltages | |
| Liu et al. | Integrated magnetics optimization process for an interleaved three‐phase buck converter at 500 kHz | |
| Ahmad et al. | Performance and design comparison of moving-magnet linear oscillating actuators based on their mover positions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |