CN106787145B - Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch - Google Patents
Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch Download PDFInfo
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- CN106787145B CN106787145B CN201611251859.5A CN201611251859A CN106787145B CN 106787145 B CN106787145 B CN 106787145B CN 201611251859 A CN201611251859 A CN 201611251859A CN 106787145 B CN106787145 B CN 106787145B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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Abstract
The invention provides an electromagnet coil power-on protection method of an excitation type double-power-supply automatic transfer switch, which comprises the following steps: firstly, detecting a power failure signal; if a power failure signal is detected, comparing the automatic switching frequency of the dual power supplies with the set switching TIMEs LIMIT _ COUNT in unit TIME LIMIT _ TIME, if the LIMIT _ COUNT is not exceeded, sending a switching signal by the controller, electrifying an electromagnet coil on the side of a standby power supply, and instantly attracting the electromagnet to realize the switching of a mechanical structure; and detecting a position switch-on in-place signal within the set position feedback signal conversion maximum time TW _ MAX, and if the position switch-on in-place signal is not detected, automatically disconnecting the power-on signal of the electromagnet coil to finish the conversion process of the dual-power switch. The invention has the beneficial effects that: the maximum power-on time and the unit power-on times of the electromagnet coil are limited through the controller, and the problems that the electromagnet is overtime in conversion, the conversion frequency is too fast and the like are avoided, so that the purpose of prolonging the service life of the electromagnet coil is achieved.
Description
Technical Field
The invention belongs to the technical field of control of a dual-power automatic transfer switch, and particularly relates to a method for protecting an electromagnet coil of an excitation type dual-power automatic transfer switch in a power-on mode.
Background
The excitation type dual-power switch adopts an electromagnetic driving mechanism, an electromagnet coil is electrified and instantly attracted to realize switch conversion, and the electromagnet coil is powered off after the conversion action is finished. Due to the fact that the dual-power switch is blocked and the detection of the switching position is not in place in the process of switching the mechanical structure, which may occur, the power-on time of the electromagnet coil is too long, and the service life of the electromagnet is greatly reduced or even the electromagnet is blown due to overheating of the coil.
Disclosure of Invention
In view of the above, the present invention is directed to provide a method for protecting an electromagnet coil of an excitation type dual power supply automatic transfer switch, so as to solve the above-mentioned problems, effectively limit the maximum energization time and the unit energization times of the electromagnet coil, and increase the service life of the electromagnet coil.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the method for protecting the electromagnet coil of the excitation type double-power-supply automatic transfer switch comprises the following steps:
A. firstly, a controller detects a power failure signal at the side of a common power supply;
B. if a power failure signal is detected, the dual power supply automatic switching frequency is compared with the set number of switching TIMEs LIMIT _ COUNT in the unit TIME LIMIT _ TIME,
if the dual power automatic switching frequency exceeds LIMIT _ COUNT, the controller sends an alarm indication and ends the operation, waits for maintenance,
if the LIMIT _ COUNT is not exceeded, the controller sends a switching signal to electrify the electromagnet coil on the side of the standby power supply, the electromagnet is instantly attracted to realize the switching of the mechanical structure, and then the step C is carried out;
C. a switch-on in-place signal at the detection position,
if a position switch-on in-place signal is detected, the controller sends an electromagnet coil power-off signal and goes to step D,
otherwise, continuously judging whether the conversion time exceeds the set maximum conversion time TW _ MAX of the position feedback signal, if so, automatically cutting off the power-on signal of the electromagnet coil, and going to the step D,
if the TW _ MAX is not exceeded, continuously detecting a position switch-on in-place signal;
D. and completing the conversion process of the dual-power switch.
Compared with the prior art, the method for protecting the electromagnet coil of the excitation type dual-power automatic transfer switch has the following advantages:
the maximum power-on time and the unit power-on times of the electromagnet coil are limited through the controller, and the problems that the electromagnet is overtime in conversion, the conversion frequency is too fast and the like are avoided, so that the purpose of prolonging the service life of the electromagnet coil is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an electromagnet coil energization protection method of an excitation type dual power supply automatic transfer switch according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 shows a flow chart of a method for protecting the energization of the electromagnet coil of the excitation type dual-power automatic transfer switch, and the method for protecting the energization of the electromagnet coil of the excitation type dual-power automatic transfer switch comprises the following steps:
A. firstly, a controller detects a power failure signal at the side of a common power supply;
B. if a power failure signal is detected, comparing the automatic switching frequency of the dual power supplies with the set switching frequency LIMIT _ COUNT in unit TIME LIMIT _ TIME, if the automatic switching frequency of the dual power supplies exceeds LIMIT _ COUNT, sending an alarm instruction by the controller, ending operation, waiting for maintenance, and if the automatic switching frequency of the dual power supplies does not exceed LIMIT _ COUNT, sending a switching signal by the controller, enabling an electromagnet coil at the side of a standby power supply to be electrified, and enabling the electromagnet to be instantly attracted to realize the switching of a mechanical structure, and then turning to the step C;
C. detecting a position switch-on in-place signal, if the position switch-on in-place signal is detected, sending a power-off signal of the electromagnet coil by the controller, turning to the step D, otherwise, continuously judging whether the conversion time exceeds the set maximum conversion time TW _ MAX of the position feedback signal, if so, automatically cutting off the power-on signal of the electromagnet coil, turning to the step D, and if not, continuously detecting the position switch-on in-place signal;
D. and completing the conversion process of the dual-power switch.
The embodiment of the invention adds some protection methods based on the original control method of the switch controller, and the design scheme mainly starts from the following two aspects, namely limiting the maximum time of position feedback signal conversion and limiting the conversion times in unit time. The specific working principle is as follows:
after detecting a voltage fault at the side of a common power supply, the dual-power-supply controller sends an instruction to electrify the electromagnet coil at the standby side, the electromagnet is instantly attracted to realize the conversion of the mechanism, after the conversion action is finished, the controller should receive a switch-on in-place signal of the microswitch and then sends out a power-off signal of the electromagnet coil to finish the conversion process of the dual-power-supply switch;
the controller can not detect a switch-on in-place signal all the time due to the reasons of the blockage of the mechanical structure or the damage of the microswitch and the like, the electromagnet coil can be always electrified when the mechanical structure is still in the conversion process, the heating quantity is larger as the electrifying time of the electromagnet coil is longer until the enameled wire is burnt and damaged, and a short circuit is caused, so that the maximum time TW-MAX of position feedback signal conversion is limited in the controller, and when the controller still cannot detect the position switch-on feedback signal after the time of the position feedback signal exceeds the TW-MAX in the conversion process, the electrifying signal of the electromagnet coil is automatically cut off.
Because the power grid fluctuation is too large in some occasions, the automatic switching of the double power supplies is caused to be frequent, the service life of the electromagnet coil is also reduced, the switching TIMEs LIMIT _ COUNT in the unit TIME LIMIT _ TIME can be limited in the controller, and the controller automatically cuts off the electrifying signal of the electromagnet coil and gives an alarm for indication when the switching TIMEs LIMIT _ COUNT exceed the TIMEs.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. The method for protecting the electromagnet coil of the excitation type double-power-supply automatic transfer switch is characterized by comprising the following steps of:
A. firstly, a controller detects a power failure signal at the side of a common power supply;
B. if a power failure signal is detected, the dual power supply automatic switching frequency is compared with the set number of switching TIMEs LIMIT _ COUNT in the unit TIME LIMIT _ TIME,
if the dual power automatic switching frequency exceeds LIMIT _ COUNT, the controller sends an alarm indication and ends the operation, waits for maintenance,
if the LIMIT _ COUNT is not exceeded, the controller sends a switching signal to electrify the electromagnet coil on the side of the standby power supply, the electromagnet is instantly attracted to realize the switching of the mechanical structure, and then the step C is carried out;
C. a switch-on in-place signal at the detection position,
if a position switch-on in-place signal is detected, the controller sends an electromagnet coil power-off signal and goes to step D,
otherwise, continuously judging whether the conversion time exceeds the set maximum conversion time TW _ MAX of the position feedback signal, if so, automatically cutting off the power-on signal of the electromagnet coil, and going to the step D,
if the TW _ MAX is not exceeded, continuously detecting a position switch-on in-place signal;
D. and completing the conversion process of the dual-power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251859.5A CN106787145B (en) | 2016-12-30 | 2016-12-30 | Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251859.5A CN106787145B (en) | 2016-12-30 | 2016-12-30 | Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch |
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| Publication Number | Publication Date |
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| CN106787145A CN106787145A (en) | 2017-05-31 |
| CN106787145B true CN106787145B (en) | 2020-05-22 |
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| CN201611251859.5A Active CN106787145B (en) | 2016-12-30 | 2016-12-30 | Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107994679B (en) * | 2017-12-25 | 2019-12-17 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power automatic transfer switch conversion control method and dual-power automatic transfer switch |
| CN113110686B (en) * | 2021-04-28 | 2022-03-29 | 常熟开关制造有限公司(原常熟开关厂） | Automatic transfer switch conversion frequency limiting method and device and automatic transfer switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005029668A2 (en) * | 2003-09-12 | 2005-03-31 | General Electric Company | Automatic transfer switch and protection device |
| CN201374583Y (en) * | 2008-12-30 | 2009-12-30 | 上海宝路通电器有限公司 | Dual-power automatic change-over switch |
| CN202384832U (en) * | 2012-01-16 | 2012-08-15 | 青岛黄海电器设备有限公司 | Double-power supply automatic selector switch |
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2016
- 2016-12-30 CN CN201611251859.5A patent/CN106787145B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005029668A2 (en) * | 2003-09-12 | 2005-03-31 | General Electric Company | Automatic transfer switch and protection device |
| CN201374583Y (en) * | 2008-12-30 | 2009-12-30 | 上海宝路通电器有限公司 | Dual-power automatic change-over switch |
| CN202384832U (en) * | 2012-01-16 | 2012-08-15 | 青岛黄海电器设备有限公司 | Double-power supply automatic selector switch |
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