CN113035494A - Parallel permanent magnet double-coil high-speed electromagnetic actuator and drive control method thereof - Google Patents
Parallel permanent magnet double-coil high-speed electromagnetic actuator and drive control method thereof Download PDFInfo
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- CN113035494A CN113035494A CN202110305131.0A CN202110305131A CN113035494A CN 113035494 A CN113035494 A CN 113035494A CN 202110305131 A CN202110305131 A CN 202110305131A CN 113035494 A CN113035494 A CN 113035494A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
- H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
- H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F2007/1692—Electromagnets or actuators with two coils
Abstract
The invention provides a parallel permanent magnet double-coil high-speed electromagnetic actuator and a driving control method thereof, wherein the parallel permanent magnet double-coil high-speed electromagnetic actuator comprises a parallel permanent magnet, an iron core main magnetic pole, an iron core auxiliary magnetic pole, a first coil, a second coil, an armature and an armature core; the parallel permanent magnets are radial magnetizing magnetic rings and are arranged between the main magnetic pole and the auxiliary magnetic pole of the iron core and below the first coil and the second coil; the number of turns of the first coil is greater than the number of turns of the second coil. The invention also discloses a driving control method of the parallel permanent magnet double-coil high-speed electromagnetic actuator. The high-speed electromagnetic actuator has the characteristics of strong electromagnetic force, high response, low power consumption and high reliability, and is suitable for an electric control fuel system of a diesel engine.
Description
Technical Field
The invention relates to a high-speed electromagnetic actuator, in particular to a high-speed electromagnetic actuator for an electric control fuel system of a diesel engine.
Background
The high-speed electromagnetic actuator is an important element of an electronic control fuel injection system of the diesel engine, and the dynamic response capability and reliability of the high-speed electromagnetic actuator are important indexes for testing the capability of the electromagnetic actuator. In the opening and closing process of the traditional high-speed electromagnetic actuator, because system inductance is different, the structure driven by a single coil is difficult to give consideration to the opening and closing response speeds; meanwhile, the maintaining stage is the main working time period of the high-speed electromagnetic actuator, the current action time is long, especially the action time of the fuel system is longer in a large pulse width working state, the heat productivity of the coil is greatly increased, if the maintaining current can be further reduced, the safety and reliability of the high-speed electromagnetic actuator can be greatly improved, and meanwhile, the release speed of the armature can be accelerated. In addition, an actuator coil belongs to a fragile part, the short circuit and the open circuit of the coil are common faults of the electromagnetic actuator, and the traditional electromagnetic actuator is difficult to solve the problem that the normal operation of the high-speed electromagnetic actuator is influenced by the fault of the coil.
Disclosure of Invention
The invention aims to provide a parallel permanent magnet double-coil high-speed electromagnetic actuator with strong electromagnetic force, high response and low power consumption; meanwhile, the electromagnetic actuator has a redundancy function, and can solve the problem that a single coil of the traditional electromagnetic actuator is easy to break down.
The purpose of the invention is realized as follows: the invention relates to a parallel permanent magnet double-coil high-speed electromagnetic actuator, which is characterized in that: the permanent magnet type magnetic pole comprises a parallel permanent magnet, an iron core main magnetic pole, an iron core auxiliary magnetic pole, a first coil, a second coil, an armature and an armature core; the parallel permanent magnet is a radial magnetizing magnetic ring and is arranged between the main magnetic pole and the auxiliary magnetic pole of the iron core and below the first coil and the second coil; the number of turns of the first coil is greater than the number of turns of the second coil.
The present invention may further comprise:
1. the first coil and the second coil are arranged along the central axis in the radial direction;
2. the first coil and the second coil are axially arranged along the central shaft;
3. the positions of the first and second coils may be interchanged.
A driving control method of a parallel permanent magnet double-coil high-speed electromagnetic actuator is characterized by comprising the following steps:
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, when the maintenance stage is started, the first coil is continuously electrified, the second coil is powered off, and when the release stage is started, the first coil and the second coil are both powered off;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, when the maintenance stage is started, the second coil is continuously electrified, the first coil is powered off, and when the release stage is started, the first coil and the second coil are powered off;
when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil is electrified, the second coil is powered off, when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a maintenance stage, the first coil is powered off, the second coil is electrified, and when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a release stage, the first coil and the second coil are both powered off;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, but the first coil is powered off and the second coil is continuously electrified after the armature starts to move, the first coil is continuously powered off and the second coil is powered on when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a maintaining stage, and the first coil and the second coil are both powered off when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a release stage;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, but the second coil is powered off and the first coil is continuously electrified after the armature begins to move, the second coil is continuously powered off and the first coil is powered on when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a maintenance stage, and the first coil and the second coil are both powered off when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a release stage;
when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil is electrified and the second coil is powered off, when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a maintaining stage, the first coil is continuously electrified and the second coil is powered off, and when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a release stage, the first coil is powered off and the second coil is electrified with current in a direction opposite to the power-off front direction of the first coil;
when the first coil of the parallel permanent magnet double-coil high-speed electromagnetic actuator is damaged and works independently with the second coil, the current introduced by the second coil is larger than the sum of the currents when the first coil and the second coil are simultaneously electrified when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, and the current introduced by the second coil is larger than the current introduced by the first coil only when the first coil is electrified in a maintenance stage when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters the maintenance stage;
when the second coil of the parallel permanent magnet double-coil high-speed electromagnetic actuator is damaged and works independently with the first coil, the current introduced by the first coil is smaller than the sum of the currents when the first coil and the second coil are simultaneously electrified when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in the attraction stage, and the current introduced by the first coil is smaller than the current introduced by the second coil only in the maintenance stage when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters the maintenance stage.
The invention has the advantages that: the parallel permanent magnet double-coil high-speed electromagnetic actuator adopts a structure of combining the double coils and the parallel permanent magnets, so that the electromagnetic force of the system during the actuation stage of the high-speed electromagnetic actuator can be effectively enhanced, and the opening response speed of the high-speed electromagnetic actuator is improved; meanwhile, the current in the maintaining stage can be reduced, the inductance of the system in the releasing stage can be reduced, the response speed of the high-speed electromagnetic actuator in the releasing stage is increased, and the power consumption of the system is reduced; in addition, the reliability of the high-speed electromagnetic actuator is improved by adopting the structure of the double coils, and the problem that the traditional high-speed electromagnetic actuator cannot work when a single coil fails is solved.
Drawings
Fig. 1 is a schematic structural diagram of a parallel permanent magnet double-coil high-speed electromagnetic actuator.
Fig. 2 is a schematic structural view of the first coil and the second coil arranged along the axial direction of the central shaft in the present invention.
Fig. 3 is a schematic diagram of the working process of the high-speed electromagnetic actuator.
Fig. 4 is a schematic diagram of a magnetic circuit when the parallel permanent magnet double-coil high-speed electromagnetic actuator is energized.
Fig. 5 is a schematic diagram of a magnetic circuit of the parallel permanent magnet dual-coil high-speed electromagnetic actuator when the power is off.
Fig. 6 is a schematic magnetic circuit diagram of a parallel permanent magnet dual-coil high-speed electromagnetic actuator in which a first coil is de-energized and a second coil is energized with a current in a direction opposite to a direction before the first coil is de-energized.
In the figure, 1: a main pole of the iron core; 2: an iron core auxiliary magnetic pole; 3: permanent magnets are connected in parallel; 4: a first coil; 5: a second coil; 6: an armature; 7: an armature core; 8: a central axis.
Detailed Description
The invention is described in more detail below by way of example with reference to the accompanying drawings.
With reference to fig. 1, 2 and 3, the invention provides a parallel permanent magnet dual-coil high-speed electromagnetic actuator, which comprises an iron core main magnetic pole 1, an iron core auxiliary magnetic pole 2, a parallel permanent magnet 3, a first coil 4, a second coil 5, an armature 6 and an armature core 7. The iron core main magnetic pole 1 is of a soft magnetic material boss structure, and the iron core auxiliary magnetic pole 2 is of a soft magnetic material circular ring structure. The parallel permanent magnet 3 is a radial magnetizing magnetic ring, and the parallel permanent magnet 3 is arranged between the iron core main magnetic pole 1 and the iron core auxiliary magnetic pole 2 and below the first coil 4 and the second coil 5; the number of turns of the first coil 4 is greater than that of the second coil 5, the first coil 4 and the second coil 5 are arranged along the radial direction or the axial direction of the central shaft 8, and the positions of the first coil 4 and the second coil 5 can be mutually exchanged.
As shown in fig. 3, the working process of the parallel permanent-magnet dual-coil high-speed electromagnetic actuator includes an actuation stage (from the time when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator starts to be powered on to the time when the armature 6 reaches the maximum displacement), a maintenance stage (from the time when the armature 6 reaches the maximum displacement to the time when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is powered off), and a release stage (from the time when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is powered off to the time when the armature 6 reaches the initial displacement). The system magnetic resistance of the high-speed electromagnetic actuator at the initial position and the maximum displacement position is greatly different, so that the inductance of the system is obviously different in the attraction stage and the maintenance stage, and the traditional high-speed electromagnetic actuator adopting a single coil only can compromise the number of turns of the coil and cannot give consideration to both processes; the parallel permanent-magnet double-coil high-speed electromagnetic actuator respectively adopts coils with different numbers of turns to work in the attraction stage and the maintenance stage, the number of turns of the coil required in the corresponding process can be respectively optimized, the purpose of simultaneously improving the opening response speed and the closing response speed of the high-speed electromagnetic actuator is achieved, and the integral response speed is favorably improved. In addition, any one of the first coil 4 and the second coil 5 is damaged, and the other coil can still start to work, so that the reliability of the high-speed electromagnetic actuator is improved, the problem that the single coil of the traditional high-speed electromagnetic actuator cannot work when the single coil of the traditional high-speed electromagnetic actuator breaks down is solved, and the occurrence of accidents is reduced.
The invention also provides a driving control method of the parallel permanent magnet double-coil high-speed electromagnetic actuator, which comprises the following steps:
embodiment 1: with reference to fig. 1, 3 and 4, the method is characterized in that: when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in the attraction stage, the first coil 4 and the second coil 5 are electrified simultaneously, and at the moment, the magnetic fluxes generated by the first coil 4 and the second coil 5Φ 2Parallel magnetic flux generated by the parallel permanent magnets 3Φ 1The magnetic force of the system on the armature 6 is increased by acting on the armature 6 together, and the opening response speed of the high-speed electromagnetic actuator can be effectively improved. When the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a maintenance stage, the first coil 4 is continuously electrified and the second coil 5 is powered off, or the first coil 4 is powered off and the second coil 5 is continuously electrified. In the maintaining stage, the magnetic resistance at the air gap is reduced, and the required magnetomotive force is smaller, so that the power consumption of the system can be effectively reduced by adopting single coil driving, the inductance of the system can be reduced, the attenuation speed of the driving current in the releasing stage is increased, and the closing response speed of the high-speed electromagnetic actuator is improved. When the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a release stage, the first coil 4 and the second coil 5 are powered off, so that the armature 6 quickly returns to the initial position. In the working process of the parallel permanent-magnet double-coil high-speed electromagnetic actuator, coils with different numbers of turns are adopted for working in the attraction stage and the maintenance stage respectively, the number of turns of the coils required in the corresponding process can be optimized respectively, and the opening response speed and the closing response speed of the high-speed electromagnetic actuator can be considered.
Embodiment 2: with reference to fig. 1 and 3, when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is in the closing stage, the first coil 4 is powered on and the second coil 5 is powered off; when the maintaining stage is entered, the first coil 4 is powered off and the second coil 5 is powered on; the first coil 4 and the second coil 5 are both de-energized when the release phase is entered. In the working process of the parallel permanent magnet double-coil high-speed electromagnetic actuator, the attracting stage and the maintaining stage respectively adopt coils with different numbers of turns to work, the number of turns of the coils required in the corresponding process can be respectively optimized, and the opening response speed and the closing response speed of the high-speed electromagnetic actuator can be considered.
Embodiment 3: with reference to fig. 1 and fig. 3, when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is in the closing phase, the first coil 4 and the second coil 5 are simultaneously energized, but after the armature 6 starts to move, the first coil 4 is powered off and the second coil 5 is continuously energized, or the second coil 5 is powered off and the first coil 4 is continuously energized; when the maintaining stage is entered, the first coil 4 is continuously powered off, and the second coil 5 is powered on; the first coil 4 and the second coil 5 are both de-energized when the release phase is entered. In the embodiment, the first coil 4 and the second coil 5 are simultaneously electrified in the attraction stage, but only any one of the first coil 4 and the second coil 5 is adopted to work after the armature 6 starts to move, so that the electromagnetic force when the armature 6 quickly reaches the maximum displacement is reduced, the phenomenon of violent impact is avoided, the rebound of the armature 6 is reduced, and the mechanical damage of parts of a high-speed electromagnetic actuator is reduced.
Embodiment 4: with reference to fig. 1, fig. 3, fig. 5 and fig. 6, when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is in the attraction stage, the first coil 4 is powered on and the second coil 5 is powered off, when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator enters the maintenance stage, the first coil 4 is continuously powered on and the second coil 5 is powered off, and when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator enters the release stage, the first coil 4 is powered off and the second coil 5 is powered on by a current in a direction opposite to a direction. In the release stage, if the first coil 4 and the second coil 5 of the parallel permanent magnet double-coil high-speed electromagnetic actuator are both powered off, the parallel permanent magnet 3 can independently generate magnetic flux passing through the iron core main magnetic pole 1, the air gap, the armature 6 and the iron core auxiliary magnetic pole 2Φ 3And magnetic flux passing through the core main pole 1 and the core auxiliary pole 2Φ 4Albeit magnetic fluxΦ 3Much less than magnetic fluxΦ 4But magnetic fluxΦ 3Still prevents the armature 6 from returning to the initial position, and is not beneficial to improving the high-speed electromagnetic actuatorClosing response speed of the line. In the present embodiment, the first coil 4 is de-energized and the second coil 5 is energized with a current opposite to the direction of the current before the first coil 4 is de-energized during the release phase, so that the second coil 5 generates a magnetic flux opposite to the direction of the magnetic flux generated by the parallel permanent magnet 3 and flowing through the armatureΦ 5The magnetic flux generated by the parallel permanent magnets 3 and flowing through the armature is weakenedΦ 3So that the electromagnetic force acting on the armature 6 is rapidly eliminated, and the closing response speed of the high-speed electromagnetic actuator is accelerated.
Embodiment 5: with reference to fig. 1 and fig. 3, when the first coil 4 of the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is damaged and the second coil 5 works alone, the current passed through the second coil 5 when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is in the attraction stage is greater than the sum of the currents when the first coil 4 and the second coil 5 are simultaneously energized, and the current passed through the second coil 5 when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator enters the maintenance stage is greater than the current passed through when only the first coil 4 is energized in the maintenance stage. According to the embodiment, when the first coil 4 is damaged, the second coil 5 can still be started to work, the reliability of the high-speed electromagnetic actuator is improved, the problem that the single coil of the traditional high-speed electromagnetic actuator cannot work when the single coil breaks down is solved, and the occurrence of accidents is reduced.
Embodiment 6: with reference to fig. 1 and fig. 3, when the second coil 5 of the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is damaged and the first coil 4 works alone, the current passed through the first coil 4 when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator is in the pull-in stage is smaller than the sum of the currents when the first coil 4 and the second coil 5 are simultaneously energized, and the current passed through the first coil 4 when the parallel permanent-magnet dual-coil high-speed electromagnetic actuator enters the maintenance stage is smaller than the current passed through the first coil 4 when only the second coil 5 is energized in the maintenance stage. According to the embodiment, when the second coil 5 is damaged, the first coil 4 can still be started to work, the reliability of the high-speed electromagnetic actuator is improved, the problem that the single coil of the traditional high-speed electromagnetic actuator cannot work when the single coil breaks down is solved, and accidents are reduced.
The above description is only exemplary of the present invention, and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A high-speed electromagnetic actuator of parallelly connected permanent magnetism twin coil which characterized in that: the permanent magnet parallel connection type permanent magnet parallel connection type permanent magnet comprises a parallel permanent magnet, an iron core main magnetic pole, an iron core auxiliary magnetic pole, a first coil, a second coil, an armature and an armature core, wherein the parallel permanent magnet is a radial magnetizing magnetic ring, and the parallel permanent magnet is arranged between the iron core main magnetic pole and the iron core auxiliary magnetic pole and below the first; the number of turns of the first coil is greater than the number of turns of the second coil.
2. The parallel permanent-magnet dual-coil high-speed electromagnetic actuator according to claim 1, wherein: the first coil and the second coil are arranged along the central axis in the radial direction.
3. The parallel permanent-magnet dual-coil high-speed electromagnetic actuator according to claim 1, wherein: the first coil and the second coil are axially arranged along the central shaft.
4. The parallel permanent-magnet dual-coil high-speed electromagnetic actuator according to claim 2 or 3, characterized in that: the positions of the first and second coils may be interchanged.
5. A driving control method of a parallel permanent magnet double-coil high-speed electromagnetic actuator according to claim 1, characterized in that:
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, when the maintenance stage is started, the first coil is continuously electrified, the second coil is powered off, and when the release stage is started, the first coil and the second coil are both powered off;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, when the maintenance stage is started, the second coil is continuously electrified, the first coil is powered off, and when the release stage is started, the first coil and the second coil are powered off;
when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil is electrified, the second coil is powered off, when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a maintenance stage, the first coil is powered off, the second coil is electrified, and when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a release stage, the first coil and the second coil are both powered off;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, but the first coil is powered off and the second coil is continuously electrified after the armature starts to move, the first coil is continuously powered off and the second coil is powered on when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a maintaining stage, and the first coil and the second coil are both powered off when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a release stage;
when the parallel permanent-magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil and the second coil are simultaneously electrified, but the second coil is powered off and the first coil is continuously electrified after the armature begins to move, the second coil is continuously powered off and the first coil is powered on when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a maintenance stage, and the first coil and the second coil are both powered off when the parallel permanent-magnet double-coil high-speed electromagnetic actuator enters a release stage;
when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, the first coil is electrified and the second coil is powered off, when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a maintaining stage, the first coil is continuously electrified and the second coil is powered off, and when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters a release stage, the first coil is powered off and the second coil is electrified with current in a direction opposite to the power-off front direction of the first coil;
when the first coil of the parallel permanent magnet double-coil high-speed electromagnetic actuator is damaged and works independently with the second coil, the current introduced by the second coil is larger than the sum of the currents when the first coil and the second coil are simultaneously electrified when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in an attraction stage, and the current introduced by the second coil is larger than the current introduced by the first coil only when the first coil is electrified in a maintenance stage when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters the maintenance stage;
when the second coil of the parallel permanent magnet double-coil high-speed electromagnetic actuator is damaged and works independently with the first coil, the current introduced by the first coil is smaller than the sum of the currents when the first coil and the second coil are simultaneously electrified when the parallel permanent magnet double-coil high-speed electromagnetic actuator is in the attraction stage, and the current introduced by the first coil is smaller than the current introduced by the second coil only in the maintenance stage when the parallel permanent magnet double-coil high-speed electromagnetic actuator enters the maintenance stage.
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| 刘鹏: "永磁并联磁路高速电磁铁的静态特性", 《内燃机学报》 * |
| 刘鹏: "电控燃油喷射系统复合磁路高速电磁阀设计与特性研究", 《中国优秀博硕士学位论文全文数据库(博士)工程科技Ⅱ辑》 * |
| 范立云等: "新型永磁高速电磁阀能量转换特性", 《内燃机学报》 * |
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