CN107887228B - Permanent-magnet energy-saving contactor - Google Patents
Permanent-magnet energy-saving contactor Download PDFInfo
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- CN107887228B CN107887228B CN201710969443.5A CN201710969443A CN107887228B CN 107887228 B CN107887228 B CN 107887228B CN 201710969443 A CN201710969443 A CN 201710969443A CN 107887228 B CN107887228 B CN 107887228B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Push-Button Switches (AREA)
Abstract
The invention relates to a permanent magnet energy-saving contactor, which consists of a permanent magnet core (4), an electromagnetic iron core (6), a coil (5), a change-over switch (14), a start button switch (13), a stop button switch (12), rectifier diodes D1 and D2, wherein the change-over switch (14), the start button switch (13), the stop button switch (12), the rectifier diodes D1 and D2 are mutually connected to form two diodes for rectifying an alternating current power supply into two half-wave direct currents, the direct currents in two different directions are respectively generated at the moment of the coil (7) by pressing the start button switch (14) and the stop button switch (13), namely, the power is cut off, the electromagnetic iron core (6) attracts and releases the permanent magnet core (4), and after attracting and power is cut off, the magnetic force of the permanent magnet core (4) keeps attracting the electromagnetic iron core (6), so that the energy-saving and environment-friendly operation without noise of the coil (7) current during the operation is realized, the defects of energy consumption and noise of the coil in the prior art of the contactor in live operation are overcome.
Description
Technical Field
The invention relates to a contactor, in particular to a permanent magnet energy-saving contactor which combines permanent magnet and electromagnetism and is not electrified during operation, belonging to the field of electric elements.
Background
The contactor comprises an alternating current contactor, a direct current contactor and a relay, and is applied to power, distribution and power utilization occasions, a coil is adopted to flow current to generate a magnetic field, so that a contact is closed, the operation and the stop of the implementation of power utilization are controlled, the contactor plays a vital role in the current power, and is generally applied to various power utilization occasions of power transmission and distribution. However, in the contactor of the prior art, the purpose of controlling the electricity utilization implementation is achieved by adopting the way that the coil flows current to generate a magnetic field and the contact is closed, namely, the electricity utilization implementation is implemented in the working period, the coil always flows current, and the coil is disconnected, namely, the operation is stopped. The coil always flows current, particularly an alternating current contactor has the defects that the coil consumes electric energy and electromagnetic noise interferes the surrounding environment.
Disclosure of Invention
The invention discloses a permanent magnet energy-saving contactor with a coil not flowing current in a working state, aiming at overcoming the defects of electric energy consumption and electromagnetic noise interference of the prior art of the contactor, and the technical scheme is as follows: the utility model provides an energy-conserving contactor of permanent magnetism, mainly by forever magnetic core, electromagnetic core, coil and change-over switch, start button switch, stop button switch, rectifier diode D1 and D2 and elasticity preforming, reaction spring constitute, its characterized in that of changing the magnetic polarity of electromagnetic core: in the permanent magnet core, electromagnetic core, coil and change-over switch, start button switch, stop button switch, rectifier diodes D1, D2 and their elastic pressure sheet and reaction spring, the mutual correlation between the change-over switch, start button switch and stop button switch, the electric connection of two rectifier diodes D1 and D2, coil and power line, and the elastic pressure sheet on one end of the cover plate and the reaction spring between the cover plate and the base form the need of starting operation or stopping of the electromagnetic core with electricity, the magnetic polarity change of the coil instantly conducting the positive half-wave current power-on, namely power-off, and the reverse half-wave current power-on, namely power-off is generated, the attraction between the permanent magnet core and the electromagnetic core is generated by pressing the start button switch, the instant attraction between the permanent magnet core and the permanent magnet core is generated, the attraction between the permanent magnet core and the electromagnetic core and the lower stop button switch are continuously maintained by the magnetic attraction force of the permanent magnet core, The coil instantaneously repels the same magnetic polarity of the permanent magnet core to release and cut off the power, and the suspension state of the permanent magnet core is continuously kept by the reverse force of the counter-force spring, so that the energy-saving and environment-friendly purposes of no current and no noise of the coil in the operating state are realized;
the permanent magnet core is a small-size permanent magnet steel with a magnetic pole N pole or S pole in the middle and another magnetic pole S pole or N pole on two sides, the back of the magnetic pole is fixed below the cover plate and is suspended above the electromagnetic core downwards through a Chinese character 'shan', and an elastic pressing sheet for pushing the change-over switch to change the current direction of the coil is fixedly arranged at one end above the cover plate through screws;
the electromagnetic iron core is a reversed-Y-shaped iron core formed by stacking steel sheet materials with small remanence rate, the reversed-Y-shaped back surface is fixed above the base, the reversed-Y-shaped opening is upwards matched with the reversed-Y-shaped opening of the permanent magnet core, and counterforce springs for supporting the permanent magnet core in a static state and suspending the permanent magnet core above the electromagnetic iron core are respectively arranged between the base and the two corresponding sides of the cover plate;
the electromagnetic iron core is magnetized to generate attraction magnetic force opposite to the magnetic polarity of the permanent magnet core and attract and stop the other reverse half-wave direct current respectively by the mutual electric connection of a start button switch, a stop button switch and a change-over switch, so that the electromagnetic iron core generates a repulsive magnetic force same as the magnetic polarity of the permanent magnet core and releases the repulsive magnetic force, and the work state of no current and no noise is formed, wherein the work state is that the coil is powered off after instant power-on;
the rectifier diodes D1 and D2 adopt IN400 series, ordinary rectifier diodes with withstand voltage of 400V and current of more than 0.5A;
change over switch, start button switch, stop button switch and electric connection mode thereof, wherein: the change-over switch comprises a switch rocker, a bridge rocker, a switch point a, a switch point o and a switch point and is arranged in a contactor shell which is precisely matched with the elastic pressing sheet; the starting button switch and the stopping button switch adopt two identical composite button switches with a normally open contact, a normally closed contact and a conductive bridge plate;
the start button switch is pressed by one normally closed contact of the start button switch and a switch b point of the change-over switch, the other normally closed contact of the stop button switch and a normally open contact of the stop button switch, the other normally open contact of the stop button switch is electrically connected with the negative electrode of the rectifier diode D2, one normally open contact of the start button switch and a switch a point of the change-over switch, the other normally open contact of the stop button switch and a normally closed contact of the stop button switch, the other normally closed contact of the stop button switch is electrically connected with the positive electrode of the rectifier diode D1, a lead wire at one end of a coil is simultaneously electrically connected with the negative electrode of the diode D1 and the positive electrode of the D2, a lead wire at the other end of the coil is electrically connected with a power line, the other power line is electrically connected with a switch o point of the change-over switch, the coil on the electromagnetic core obtains a positive half-wave current with the polarity opposite, The coil on the electromagnetic core obtains another reverse half-wave current the same with permanent magnet core magnetic polarity and releases and cuts off the power supply, after the outage, the reverse holding power of reaction spring continues to suspend the permanent magnet core in the associated structure above the electromagnetic core, realizes that the coil does not have energy-conserving, the environmental protection operation of electric current, noiselessness in the operation process.
The permanent magnet energy-saving contactor provided by the invention is characterized in that a permanent magnet core, an electromagnetic core and two rectifier diodes are adopted to be matched with a transfer switch, a start button switch and a stop button switch for mutual correlation connection, so that the energy-saving and electromagnetic vibration noise interference-free operation with uncharged coils in the operation process of an alternating current contactor, a direct current contactor and a relay is realized, and the defects of electric energy consumption and electromagnetic noise interference caused by the fact that the coils are always electrified in the operation process of the alternating current contactor, the direct current contactor and the relay in the prior art are overcome.
Drawings
The attached drawing is a schematic diagram of the overall structure principle.
The reference numbers illustrate:
in the figure: 1. the switch is an auxiliary contact, 2 is a main contact, 3 is a cover plate, 4 is a permanent magnet core, 5 is a reaction spring, 6 is an electromagnetic iron core, 7 is a coil, 8 is a base, 9 is a lead wire a, 10 is a lead wire b, 11 is a power supply wire, D1 and D2 are rectifier diodes, 12 is a stop button switch, 13 is a start button switch, 14 is a change-over switch, 15 is a normally open contact, 16 is a conductive bridge plate, 17 is a normally closed contact, 18 is a switch a point, 19 is a switch o point, 20 is a switch b point, 21 is a bridge plate, 22 is a switch rocker plate, 23 is a pressing sheet and 24 screws.
Detailed Description
The above invention will be further explained with reference to the accompanying drawings.
The attached drawing is the overall structure principle sketch map of a permanent magnet energy-saving contactor of the invention, combine the permanent magnet energy-saving contactor in the drawing, mainly by the permanent magnet core 4, the electromagnetic core 6, the coil 7 and the change-over switch 14, start button switch 13, stop button switch 12, rectifier diode D1 and D2 and its elasticity preforming 23, reaction spring 5 make up, characterized by that: in a permanent magnet core 4, an electromagnetic iron core 6, a coil 7, a change-over switch 14, a start button switch 13, a stop button switch 12, rectifier diodes D1 and D2, an elastic pressing sheet 23 and a reaction spring 5 which form a permanent magnet energy-saving contactor, the mutual association among the change-over switch 14, the start button switch 13 and the stop button switch 12 is electrically connected with two rectifier diodes D1, D2, the coil 7 and a power wire 11, the elastic pressing sheet 23 is arranged at one end of a cover plate 3, the reaction spring 5 is arranged between the cover plate 3 and a base 8, the requirement of starting operation or stop of the electromagnetic iron core 6 implemented by electricity is formed, the magnetic polarity change that the coil 7 is instantly conducted with forward half-wave current for power-on or power-off and the reverse half-wave current for power-on or power-off is generated, the magnetic attraction or attraction between the permanent magnet core 4 and the electromagnetic iron core 6 is continuously kept by the magnetic attraction of the permanent magnet core 4 and the pressing down of the electromagnetic iron core 6 by the The button switch 12 is stopped, the magnetic core 4 is instantaneously repelled by like poles to release and cut off the power, the suspension state of the magnetic core 4 is continuously kept by the reverse force of the counter spring 5, and the purposes of energy conservation and environmental protection of no current and no noise of the coil 7 in the operating state are realized;
the permanent magnet core 4 is a small-size permanent magnet steel with a magnetic pole N pole or S pole in the middle and another magnetic pole S pole or N pole on two sides, the back of the magnetic pole is fixed below the cover plate 3, the magnetic pole is suspended above the electromagnetic core 6 downwards in a reversed-V shape, and an elastic pressing sheet 23 for pushing the change switch 14 to change the current direction of the coil 7 is fixedly arranged at one end above the cover plate 3 by a screw 24;
the electromagnetic iron core 6 is a reversed-Y-shaped iron core formed by stacking steel sheet materials with small remanence rate, the reversed-Y-shaped back surface is fixed above the base 8, the reversed-Y-shaped opening is upwards matched with the reversed-Y-shaped opening of the permanent magnet core 4, and reaction springs 5 for supporting the permanent magnet core 4 in a static state and suspending above the electromagnetic iron core 6 are respectively arranged between the base 8 and the two corresponding sides of the cover plate 3;
the coil 7 is sleeved on the middle column in the shape of a Chinese character 'shan' of the electromagnetic iron core 6, a lead b10 of the coil 7 is simultaneously connected with the cathodes of two rectifier diodes D1 and the anode of D2, 220v or 380v alternating current is rectified into two half-wave direct currents which are respectively and electrically connected with each other through the start button switch 13, the stop button switch 12 and the change-over switch 14, so that a positive half-wave direct current for starting the input coil 7 is formed, the electromagnetic iron core 6 is magnetized to generate an attraction magnetic force opposite to the magnetic polarity of the permanent magnet core 4 to attract and a stopped reverse half-wave direct current, the electromagnetic iron core 6 generates another repulsion magnetic force same with the magnetic polarity of the permanent magnet core 4 to release, and the work state of no current and no noise is formed after the coil 7 is instantly electrified;
the rectifier diodes D1 and D2 adopt IN400 series, ordinary rectifier diodes with withstand voltage of 400V and current of more than 0.5A;
change-over switch 14, start button switch 13, stop button switch 12 and electric connection mode thereof, wherein: the change-over switch 14 comprises a switch rocker 22, a bridge rocker 21, a switch a point 18, a switch o point 19 and a switch b point 20, and is arranged in a contactor shell which is precisely matched with an elastic pressing sheet 23; the start button switch 13 and the stop button switch 12 adopt two same compound button switches with a normally open contact 15, a normally closed contact 17 and a conductive bridge plate 16;
the start button switch 13 is pressed down by electrically connecting one normally closed contact 17 of the start button switch 13 with a switch b point 20 of the transfer switch 14, the other normally closed contact 17 with a normally open contact 15 of the stop button switch 12, the other normally open contact 15 of the stop button switch 12 with a cathode of a rectifier diode D2, one normally open contact 15 of the start button switch 13 with a switch a point 18 of the transfer switch 14, the other normally open contact 15 with a normally closed contact 17 of the stop button switch 12, the other normally closed contact 17 of the stop button switch 12 with an anode of a rectifier diode D1, and a lead b10 at one end of the coil 7 with a cathode of a diode D1 and an anode of a D2, a lead a9 at the other end with a power line 11, the other power line 11 with a switch o point 19 of the transfer switch 14, the coil 7 on the electromagnetic core 6 is attracted and de-energized by obtaining a positive half-wave current with a polarity opposite to that of the permanent magnet core 4, after the power failure, the permanent magnet core 4 is continuously attracted by the magnetic attraction of the permanent magnet core 4, the stop button switch 12 is pressed, the coil 7 on the electromagnetic core 6 obtains another reverse half-wave current with the same magnetic polarity as the permanent magnet core 4, the reverse half-wave current is released and the power failure is realized, after the power failure, the reverse supporting force of the counter force spring 5 continuously suspends the permanent magnet core 4 in the associated structure above the electromagnetic core 6, and the energy-saving and environment-friendly operation without current and noise of the coil 7 in the operation process is realized.
When in use, the permanent magnet core 4 and the electromagnetic core 6 are supported by the reaction spring 5 and are in a suspension state before use, the elastic pressing sheet 23 is above the switch seesaw 22 of the change-over switch 14, and the bridge seesaw 21 in the change-over switch 14 is conducted with the switch a point 18 and the switch o point 19; at the moment of pressing the start button switch 13, the external alternating current power supply forms a loop with one power line 11 from the switch o point, the switch a point, two normally open contacts 15 of the start switch 13, two normally closed contacts 17 of the stop switch 12, the rectifier diode D1, a half-wave current rectified by the rectifier diode D1, a lead wire b10 of the coil 7, a lead wire a9 and the other power line 11, a magnetic pole magnetized electromagnetic core 6 with opposite magnetic polarity to the permanent magnet core 4 is formed in the coil 7 instantaneously, so that the mutual attraction force between the electromagnetic core 6 and the permanent magnet core 4 is enough to attract down the permanent magnet core 4 against the supporting force of the counterforce spring 5, the main contact 2 is closed, while attracting down the permanent magnet core 4, the elastic pressing sheet 23 is under the switch seesaw 22 of the change-over switch 14, the switch a point 18 is disconnected from the switch o point 19, the coil 7 loses the loop and is powered off, and at the moment, the counterforce of the permanent magnet core 4 to the electromagnetic core 6 is far The main contact 2 is kept closed after the attraction is kept, so that the coil 7 can run without current and noise; when the electromagnetic switch is stopped, the iron core is attracted, the elastic pressing sheet 23 is downward, the bridge seesaw 21 is conducted with the switch b point 20 and the switch o point 19, at the moment when the stop button switch 12 is pressed down, an alternating current power supply forms a loop from the lead a9, the coil 7, the lead b10, the rectifier diode D2, the two normally open contacts 15 of the stop button switch 12, the two normally closed contacts 17 of the start switch 13, the switch b point of the change-over switch 14, the switch o point and the power line 11 by the other power line 11, the coil 7 obtains a half-wave current in the opposite direction, the electromagnetic iron core 6 is instantaneously formed to generate a magnetic pole with the same magnetic polarity as that of the permanent magnet core 4 to repel each other and release, the permanent magnet core 4 is pushed out to be suspended above the electromagnetic iron core 6 to be recovered to the original position above the permanent magnet core 6, the elastic pressing sheet 23 is pushed back to the upper part of the switch, when the coil 7 loses the loop and is powered off, the permanent magnet core 4 is supported by the supporting force of the counterforce spring 5 and continues to keep suspended with the electromagnetic core 6, and the main contact 2 is kept normally open.
The invention relates to a permanent magnet energy-saving contactor, which is formed by mutually connecting a change-over switch 14, a start button switch 13, a stop button switch 12, rectifier diodes D1 and D2 which form two rectifier diodes D1 and D2 to rectify an alternating current into two half-wave direct currents, wherein the two half-wave direct currents are used for generating attraction and disconnection between an electromagnetic core 6 and a permanent magnet core 4 by pressing down the start button switch 13 at the moment when the start and stop electricity is used, the magnetic attraction of the permanent magnet core 4 is kept to be attracted with the electromagnetic core 6 and pressed down at the moment when the stop button switch 12 is pressed down and the magnetic attraction of the electromagnetic core 6 to the permanent magnet core 4 is generated by a coil 7 at the moment when the electromagnetic core 6 to be attracted to the same magnetic polarity of the permanent magnet core 4 and is repelled to be released and disconnected, the suspension state of the permanent magnet core 4 is kept after the power is disconnected due to the supporting force of a reaction spring 5, the energy-saving and environment-friendly electromagnetic vibration noise-free energy-saving electromagnetic vibration noise-free energy.
Claims (6)
1. The utility model provides an energy-conserving contactor of permanent magnetism, mainly by permanent magnet iron core (4), electromagnetic core (6), coil (5) and change over switch (14), start button switch (13), stop button switch (12), rectifier diode D1 and D2 and elasticity preforming (23), reaction spring (5) are constituteed, its characterized in that: in a permanent magnet core (4), an electromagnetic iron core (6), a coil (5), a change-over switch (14), a start button switch (13), a stop button switch (12), rectifier diodes D1 and D2, an elastic pressing sheet (23) and a reaction spring (5) which form a permanent magnet energy-saving contactor, a mutual correlation structure is formed by the electric connection between the change-over switch (14), the start button switch (13) and the stop button switch (12) and the electric connection between the two rectifier diodes D1, D2, the coil (7) and a power line (11), the change-over switch (14) comprises a switch rocker (22), a bridge rocker (21), a switch point a (18), a switch point o (19) and a switch point b (20) which are arranged in a contactor shell precisely matched with the elastic pressing sheet (23), and a normally closed contact (17) of the start button switch (13) and the switch point b (20) of the change-over switch (14), The other normally closed contact (17) is electrically connected with one normally open contact (15) of the stop button switch (12), the other normally open contact (15) of the stop button switch (12) is electrically connected with the cathode of a rectifier diode D2, one normally open contact (15) of the start button switch (13) is electrically connected with a switch point a (18) of a transfer switch (14), the other normally open contact (15) is electrically connected with one normally closed contact (17) of the stop button switch (12), the other normally closed contact (17) of the stop button switch (12) is electrically connected with the anode of a rectifier diode D1, a lead b (10) at one end of a coil (7) is connected with the cathode of a diode D1 and the anode of a diode D2, a lead a (9) at the other end of the coil (7) is directly connected with a power line (11), the other power line (11) is electrically connected with a switch point o (19) of the transfer switch (14) to form a push-down start button switch (, coil (7) on electromagnetic core (6) obtain one with permanent magnet core (4) magnetic polarity opposite forward half-wave current and actuation, release start button switch (13), after coil (7) outage, continue actuation and press stop button switch (12) by the magnetic attraction of permanent magnet core (4), coil (7) on electromagnetic core (6) obtain another with permanent magnet core (4) magnetic polarity the same reverse half-wave current and release, release stop button switch (12), after coil (7) outage, continue to suspend permanent magnet core (4) in the associated structure of electromagnetic core (6) top by the reverse holding power of reaction spring (5).
2. The permanent magnet energy saving contactor according to claim 1, wherein: the permanent magnet core (4) is a small Chinese character 'shan' shaped permanent magnet with a magnetic pole N pole or S pole in the middle and another magnetic pole S pole or N pole on two sides, and an elastic pressing sheet (23) which is fixed below the cover plate (3) and used for pushing the change-over switch (14) to change the current direction of the coil (7) is fixedly arranged at one end above the cover plate (3) through a screw (24).
3. The permanent magnet energy saving contactor according to claim 1, wherein: the electromagnetic iron core (6) is a reversed-Y-shaped iron core formed by overlapping steel sheets with small remanence rate, is fixed above the base (8), and is respectively provided with a counter-force spring (5) which supports the permanent magnet core (4) and is suspended above the electromagnetic iron core (6) between the base (8) and the two corresponding sides of the cover plate (3).
4. The permanent magnet energy saving contactor according to claim 1, wherein: the coil (7) is sleeved on the middle column in the shape of a Chinese character 'shan' of the electromagnetic iron core (6), one lead of the coil (7) is simultaneously connected with the cathode of the diode D1 and the anode of the diode D2, 220v or 380v alternating current is rectified into two half-wave direct currents which are respectively and electrically connected with each other through the starting button switch (13), the stopping button switch (12) and the change-over switch (14) to form a starting forward half-wave direct current and a stopping reverse half-wave direct current which are input into the coil (7), and the attraction and the release of the electromagnetic iron core (6) to the permanent magnet core (4) are realized.
5. The permanent magnet energy saving contactor according to claim 1 or 4, wherein: the rectifier diodes D1 and D2 are IN400 series, and are common rectifier diodes with withstand voltage of 400V and current of 0.5A or more.
6. The permanent magnet energy saving contactor according to claim 1, wherein: the start button switch (13) and the stop button switch (12) adopt two same compound button switches with a normally open contact (15), a normally closed contact (17) and a conductive bridge plate (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710969443.5A CN107887228B (en) | 2017-10-02 | 2017-10-02 | Permanent-magnet energy-saving contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710969443.5A CN107887228B (en) | 2017-10-02 | 2017-10-02 | Permanent-magnet energy-saving contactor |
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| CN107887228A CN107887228A (en) | 2018-04-06 |
| CN107887228B true CN107887228B (en) | 2020-05-01 |
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| CN201710969443.5A Active CN107887228B (en) | 2017-10-02 | 2017-10-02 | Permanent-magnet energy-saving contactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113437851A (en) * | 2021-06-03 | 2021-09-24 | 宁波艾优生物科技有限公司 | Axial linear reciprocating oscillation micromotor and electric toothbrush |
| CN116110745A (en) * | 2022-08-17 | 2023-05-12 | 大连赛夫科技有限公司 | Electromagnetic switch and switch control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87208809U (en) * | 1987-06-04 | 1988-08-10 | 郝绍伟 | Energy-saving ac contactor |
| CN101345158A (en) * | 2007-07-12 | 2009-01-14 | 张大庆 | Explosion-proof rocker switch |
| CN102339686A (en) * | 2010-07-20 | 2012-02-01 | 易善堃 | Low-consumption and high-efficiency electromagnetic system |
-
2017
- 2017-10-02 CN CN201710969443.5A patent/CN107887228B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87208809U (en) * | 1987-06-04 | 1988-08-10 | 郝绍伟 | Energy-saving ac contactor |
| CN101345158A (en) * | 2007-07-12 | 2009-01-14 | 张大庆 | Explosion-proof rocker switch |
| CN102339686A (en) * | 2010-07-20 | 2012-02-01 | 易善堃 | Low-consumption and high-efficiency electromagnetic system |
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| CN107887228A (en) | 2018-04-06 |
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Effective date of registration: 20200402 Address after: 321300 No. 7 Baifulin Avenue, Xialixi Industrial Zone, Shizhu Town, Yongkang City, Jinhua City, Zhejiang Province Applicant after: ZHEJINAG YETEGM ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: A Xinhong prosperous road building Huli District of Xiamen city in Fujian province 361006 room 1101 Applicant before: Zhan Xingbo |
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