CN112435891B - Electromagnetic drive control method, vacuum circuit breaker control device, and storage medium - Google Patents
Electromagnetic drive control method, vacuum circuit breaker control device, and storage medium Download PDFInfo
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- CN112435891B CN112435891B CN202011185835.0A CN202011185835A CN112435891B CN 112435891 B CN112435891 B CN 112435891B CN 202011185835 A CN202011185835 A CN 202011185835A CN 112435891 B CN112435891 B CN 112435891B
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- circuit breaker
- control method
- vacuum circuit
- drive control
- electromagnetic drive
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Keying Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an electromagnetic drive control method, which is realized on the basis of a vacuum circuit breaker body, a drive circuit and a controller which are electrically connected in sequence, and comprises the following steps of: receiving an instruction for controlling the switching-on of the vacuum circuit breaker; at least one pulse signal is sent to a driving circuit within the preset first-stage closing time, so that the driving circuit periodically drives a vacuum circuit breaker to perform first-stage closing; and sending a driving signal to the driving circuit within the preset second-stage closing time so that the driving circuit drives the vacuum circuit breaker to perform second-stage closing. The electromagnetic drive control method is beneficial to preventing the moving contact from impacting the static contact with larger kinetic energy, thereby preventing the moving contact and the static contact from being combined and separated for many times and avoiding causing severe vibration of equipment.
Description
Technical Field
The invention relates to the technical field of vacuum circuit breaker application, in particular to an electromagnetic drive control method, a vacuum circuit breaker control device and a storage medium.
Background
The vacuum circuit breaker is an important part on a railway locomotive, controls the on-off of a main circuit of the locomotive, usually controls a main power supply of the whole locomotive in a main circuit of a main power supply of the locomotive, and quickly cuts off the power supply when a short circuit or other serious faults occur in a circuit of the locomotive, thereby playing a role in protecting the locomotive. Meanwhile, a driver controls the action of the vacuum circuit breaker by operating a control device of the vacuum circuit breaker to realize the on-off of the locomotive power supply.
The control device of the existing electromagnetic vacuum circuit breaker utilizes electromagnetic force to drive the vacuum circuit breaker to complete the closing operation in an electromagnetic driving mode and keep the vacuum circuit breaker in a closing state. However, in a common electromagnetic driving mode, the magnitude of the electromagnetic attraction cannot be adjusted, so that the electromagnet is too violent to act during switching on, a moving contact and a static contact are repeatedly connected and disconnected, equipment is severely vibrated, and equipment faults are easily caused to affect use.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an electromagnetic drive control method which can eliminate the phenomenon that a moving contact and a static contact are combined and separated for many times, so that severe vibration of equipment is avoided.
The invention also provides a vacuum circuit breaker control device with the electromagnetic drive control method.
The invention also provides a storage medium with the electromagnetic drive control method.
According to an embodiment of the first aspect of the present invention, the electromagnetic drive control method is implemented based on a vacuum circuit breaker body, a drive circuit and a controller which are electrically connected in sequence, and includes the following steps: receiving an instruction for controlling the switching-on of the vacuum circuit breaker; at least one pulse signal is sent to a driving circuit within the preset first-stage closing time, so that the driving circuit periodically drives a vacuum circuit breaker to perform first-stage closing; and sending a driving signal to the driving circuit at the preset second-stage switching-on time so that the driving circuit drives the vacuum circuit breaker to perform second-stage switching-on.
The electromagnetic drive control method provided by the embodiment of the invention has at least the following beneficial effects: the controller enters first-stage switching-on time after receiving an instruction for controlling the vacuum circuit breaker to switch on, and sends at least one pulse signal to the driving circuit within the first-stage switching-on time, so that the driving circuit drives a switching-on coil of the vacuum circuit breaker to be periodically and circularly switched between an on state and an off state, and a moving contact of the vacuum circuit breaker approaches a static contact of the vacuum circuit breaker at a slower speed to perform first-stage switching-on; and when the first-stage switching-on time is over, the controller enters the second-stage switching-on time, and in the second-stage switching-on time, the controller sends a driving signal to the driving circuit to switch on a switching-on coil of the vacuum circuit breaker to perform second-stage switching-on, so that the moving contact is contacted with the static contact to complete the switching-on, and the moving contact is favorably prevented from impacting the static contact with larger kinetic energy, thereby avoiding the violent vibration of equipment.
According to some embodiments of the invention, the electromagnetic drive control method further comprises: and sending a holding signal to the driving circuit to enable the driving circuit to control the vacuum circuit breaker to keep a closing state so that the vacuum circuit breaker keeps the closing state.
According to some embodiments of the invention, the duty cycle of the pulse signal is in a range of 0.2 to 0.6, so that the movable contact contacts the stationary contact at a relatively low speed.
According to some embodiments of the present invention, the duty ratio of the pulse signal is 0.4, so that the movable contact contacts the stationary contact at a more appropriate speed.
According to some embodiments of the invention, the pulse signal is a rectangular pulse signal, and the rectangular pulse signal is easier to convert, thereby reducing the cost.
According to some embodiments of the invention, the drive signal is a high level signal to facilitate energizing the closing coil.
According to some embodiments of the present invention, a sum of the first-stage closing time and the second-stage closing time is a fixed value, so that the vacuum circuit breaker can work normally.
A vacuum circuit breaker control apparatus according to an embodiment of a second aspect of the present invention includes a driving circuit, a controller, a memory, and a computer program stored in the memory and running on the controller, wherein the controller is electrically connected to the driving circuit, the memory is electrically connected to the controller, and the controller implements the electromagnetic driving control method according to the first aspect when executing the computer program.
The vacuum circuit breaker control device provided by the embodiment of the invention at least has the following beneficial effects: the vacuum circuit breaker control device uses the electromagnetic drive control method of the first aspect to enable the moving contact of the vacuum circuit breaker to contact the static contact of the vacuum circuit breaker with smaller kinetic energy, so that severe vibration of equipment is avoided, and meanwhile, the reliability of the equipment is improved.
According to a storage medium of an embodiment of the third aspect of the present invention, the storage medium stores computer-executable instructions for causing a computer to execute the electromagnetic drive control method of the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of an electromagnetic drive control method according to an embodiment of the present invention;
FIG. 2 is a detailed flowchart of the electromagnetic drive control method shown in FIG. 1;
fig. 3 is a waveform diagram of the electromagnetic drive control method shown in fig. 1.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The vacuum circuit breaker comprises a closing coil, a holding coil and a closing switch, wherein the closing switch comprises a moving contact and a fixed contact. When the closing coil is electrified, the moving contact is subjected to the magnetic force of the closing coil to do accelerated motion, and approaches the fixed contact through a fixed motion route; when the closing coil is powered off, the moving contact performs deceleration movement under the resistance; when the moving contact is contacted with the static contact, closing is completed, the holding coil still keeps electrified, and the moving contact is contacted with the static contact so as to keep a closing state.
First aspect of the invention
Referring to fig. 1 and 3, an electromagnetic driving control method is implemented based on a vacuum circuit breaker body, a driving circuit, and a controller, which are electrically connected in sequence. The electromagnetic drive control method comprises the following steps: step S100, step S200, and step S300.
And S100, receiving a command for controlling the closing of the vacuum circuit breaker.
And S200, sending at least one pulse signal to the driving circuit within the preset first-stage closing time so that the driving circuit periodically drives the vacuum circuit breaker to perform first-stage closing.
Specifically, the controller receives an instruction sent by an operator to control the vacuum circuit breaker to be switched on, the controller enters first-stage switching-on time, and the controller sends at least one pulse signal to the driving circuit within the first-stage switching-on time. The driving circuit receives the pulse signal and drives the vacuum circuit breaker to carry out first-stage closing according to the pulse signal. Referring to fig. 3, since the pulse signals have a certain duty ratio, that is, one pulse signal is energized for a certain period of time and de-energized for another period of time, the driving circuit receiving the pulse signals cyclically switches the closing coil of the vacuum circuit breaker between two states of energization and de-energization periodically, so that the closing coil generates a weak magnetic force.
When the closing coil is electrified, the moving contact of the vacuum circuit breaker increases the speed under the magnetic action of the closing coil to obtain kinetic energy, and the kinetic energy is close to the static contact of the vacuum circuit breaker; when the closing coil is powered off, the moving contact has certain speed and kinetic energy, and the speed is reduced and part of the kinetic energy is lost under the action of resistance.
The duty ratio of the pulse signal can be adjusted according to the requirements of actual products so as to adjust the magnetic force of the closing coil and further adjust the speed of the moving contact. For example, if the duty ratio is reduced, the power-on time of the closing coil is reduced, so that the magnetic force applied to the moving contact is reduced, the moving contact approaches the static contact at a lower speed, the moving contact is prevented from impacting the static contact with a larger kinetic energy, the moving contact and the static contact are prevented from being repeatedly separated and combined, and the equipment is prevented from being violently vibrated; or, the duty ratio is increased, the electrifying time of the closing coil is increased, so that the magnetic force applied to the moving contact is increased, the moving contact obtains higher speed and larger kinetic energy, and the moving contact is enabled to be closer to the static contact more quickly.
In some embodiments of the invention, the duty cycle of the pulse signal is in the range of 0.2 to 0.6. Specifically, when the electromagnetic drive control method is applied to a controller of GDK05B type, the controller is used to control a vacuum circuit breaker of TDVC-660 electromagnetic series. The closing time of the TDVC-660 electromagnetic series vacuum circuit breaker is fixed 50ms.
The closing time is the sum of the closing time of the first stage and the closing time of the second stage, and the closing time is a fixed value. The first stage closing time is the time from the controller starting to send a pulse signal to the second stage closing time; the second stage closing time is a time from the start of the transmission of the driving signal to the end of the transmission of the driving signal by the controller.
In this embodiment, if the first-stage closing time is increased, the second-stage closing time is correspondingly decreased; or, if the first-stage closing time is reduced, the second-stage closing time is correspondingly increased, so that the sum of the first-stage closing time and the second-stage closing time is 50ms. For example, the range of the first stage closing time is 10ms to 40ms, the range of the corresponding second stage closing time is 10ms to 40ms, and the sum of the first stage closing time and the second stage closing time is 50ms; or the range of the first stage closing time is 15ms to 35ms, the range of the corresponding second stage closing time is 15ms to 35ms, and the sum of the first stage closing time and the second stage closing time is 50ms; or, the first stage closing time is increased to 30ms, and the second stage closing time is reduced to 20ms; or, the closing time of the first stage is reduced to 20ms, and the closing time of the second stage is increased to 30ms. In this embodiment, the first-stage closing time of the TDVC-660 electromagnetic series vacuum circuit breaker is set to 25ms, and the second-stage closing time is 25ms.
When the duty ratio of the pulse signal is 0.2, namely the ratio of the power-on time to the first-stage switching-on time is 0.2, the power-on time is 5ms and the power-off time is 20ms in the first-stage switching-on time, and compared with a switching-on coil with the power-on time of 25ms, the magnetic force of the switching-on coil with the power-on time of 5ms and the power-off time of 20ms is weaker, so that the movable contact approaches the fixed contact at a lower speed.
When the duty ratio of the pulse signal is 0.6, that is, the ratio of the power-on time to the first-stage switching-on time is 0.6, the power-on time is 15ms and the power-off time is 10ms within the first-stage switching-on time, and compared with a switching-on coil with the power-on time of 25ms, the magnetic force of the switching-on coil with the power-on time of 15ms and the power-off time of 10ms is weaker than that of the switching-on coil with the power-on time of 25ms, but compared with the duty ratio of the pulse signal of 0.2 in the previous embodiment, the duty ratio of the pulse signal of 0.6 makes the magnetic force of the switching-on coil stronger, the moving contact speed faster, and the moving contact can approach the stationary contact more quickly.
When the duty ratio of the pulse signal is 0.4, that is, the ratio of the power-on time to the first-stage switching-on time is 0.4, the power-on time is 10ms and the power-off time is 15ms within the first-stage switching-on time, and compared with a switching-on coil with the power-on time of 25ms, the magnetic force of the switching-on coil with the power-on time of 10ms and the power-off time of 15ms is weaker, but compared with the duty ratio of the pulse signal of the previous embodiment being 0.2, the magnetic force of the switching-on coil is stronger due to the duty ratio of the pulse signal being 0.4, and compared with the duty ratio of the pulse signal of the previous embodiment being 0.6, the magnetic force of the switching-on coil is weaker due to the duty ratio of the pulse signal being 0.4, that is more suitable, so that the magnetic force of the switching-on coil is closer to the fixed contact at a lower and more suitable speed, and then the fixed contact is contacted with the movable contact under the action of the driving signal, so as to avoid repeated vibration of the movable contact and the equipment, and severe separation and separation of the equipment are avoided.
According to the adjustment of the duty ratio, the electromagnetic drive control method is suitable for vacuum circuit breakers of various models, the effect that the moving contact contacts the static contact at a lower speed can be achieved by various vacuum circuit breakers through the electromagnetic drive control method, the moving contact and the static contact are prevented from being separated and combined for multiple times, severe vibration of equipment is avoided, and therefore the reliability of the equipment is improved.
It should be noted that the number of the pulse signals does not greatly affect the magnitude of the magnetic force of the closing coil. For example, in the first stage of closing time, the duty ratio of the pulse signal is set to 0.4,1 pulse signal has substantially the same influence on the closing coil as 2 pulse signals have; or in the first stage of closing time, the duty ratio of the pulse signals is set to be 0.6, the influence of 3 pulse signals on the closing coil is basically the same as the influence of 4 pulse signals on the closing coil.
And step S300, in the preset second-stage closing time, sending a driving signal to a driving circuit to enable the driving circuit to drive the vacuum circuit breaker to perform second-stage closing.
Specifically, referring to fig. 3, the controller exits from the first-stage closing time and finishes sending the pulse signal, and then enters the second-stage closing time, and in the second-stage closing time, the controller sends a driving signal to the driving circuit, so that the driving circuit controls the closing coil to be powered on, and the vacuum circuit breaker performs the second-stage closing, so that the movable contact approaches and contacts the fixed contact, and the second-stage closing is completed.
Because the moving contact has lower speed and kinetic energy and is closer to the static contact under the action of the step S200, the moving contact has shorter movement distance of accelerated movement under the action of the driving signal. The moving contact is started under the action of the driving signal until the moving contact is contacted with the static contact, the increased speed is small, the obtained kinetic energy is small, so that the moving contact is contacted with the static contact at a low speed and the kinetic energy, the moving contact and the static contact are prevented from being combined and separated for many times, and severe vibration of equipment is avoided.
The driving signal may be a high-level signal, the high-level signal has a higher voltage than the low-level signal, and the high-level signal and the low-level signal correspond to an electrical signal of "1" and an electrical signal of "0", respectively, that is, the high-level signal is used to open a switch for enabling the driving circuit to control the energization of the closing coil. The voltage of a general low-level signal is 0 to 0.25V, and the voltage of a general high-level signal is more than or equal to 3.5V; the driving signal may also be a pulse signal with a large duty ratio, such as a rectangular pulse signal with a duty ratio of 0.99; or a rectangular pulse signal with a duty cycle of 0.98.
Referring to fig. 2, in some embodiments of the present invention, the electromagnetic drive control method further comprises the steps of: and step S400.
And step S400, sending a maintaining signal to the driving circuit to enable the driving circuit to control the vacuum circuit breaker to maintain a closing state.
Specifically, when the controller sends a driving signal to the driving circuit, the controller can also synchronously send a holding signal to the driving circuit so as to electrify the holding coil of the vacuum circuit breaker. When the moving contact is in contact with the fixed contact to complete switching on, the driving signal disappears, the driving circuit enables the switching-on coil to be powered off, at the moment, under the control of the keeping signal, the driving circuit controls the keeping coil to be powered on, and the moving contact is kept in a state of being in contact with the fixed contact under the magnetic force effect of the keeping coil, namely, the switching-on state is kept.
It should be noted that the hold signal may also be sent during the process of sending the drive signal by the controller.
Referring to fig. 3, in some embodiments of the present invention, the pulse signal is a rectangular pulse signal. Specifically, the switching-on coil has two states of power-on and power-off, namely, in the process that the controller sends a pulse signal to the driving circuit to control the vacuum circuit breaker to be switched on, the pulse signal transmits two electric signals of high level and low level. The low-level electric signal is transmitted to the driving circuit, and the driving circuit enables the closing coil to be powered off; the high-level electric signal is transmitted to the driving circuit, and the driving circuit enables the closing coil to be electrified.
The rectangular pulse signal has the characteristics that the voltage of the rectangular pulse signal only has two states, namely a high level and a low level, and compared with pulse signals with more than three voltage states, such as a sharp pulse signal and the like, the rectangular pulse signal can better control a driving circuit, is easier to obtain through equipment conversion, and is lower in acquisition cost.
Second aspect of the invention
The vacuum circuit breaker control device comprises a drive circuit, a controller, a memory and a computer program which is stored on the memory and runs on the controller, wherein the controller is electrically connected with the drive circuit, the memory is electrically connected with the controller, and the electromagnetic drive control method of the first aspect is realized when the controller executes the computer program.
Specifically, the vacuum circuit breaker control device applies the electromagnetic drive control method of the first aspect, under the control of the controller, the drive circuit drives the vacuum circuit breaker to complete switching on, and in the switching on process, under the action of the electromagnetic drive control method, a moving contact of the vacuum circuit breaker approaches a static contact of the vacuum circuit breaker with lower kinetic energy to complete switching on, and meanwhile, the moving contact is prevented from impacting the static contact with higher kinetic energy, so that the moving contact and the static contact are prevented from being repeatedly switched on and off, and severe vibration of equipment is avoided.
Third aspect of the invention
A storage medium storing computer-executable instructions for causing a computer to execute the electromagnetic drive control method of the first aspect.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. An electromagnetic drive control method is realized on the basis of a vacuum circuit breaker body, a drive circuit and a controller which are electrically connected in sequence, and is characterized by comprising the following steps of:
receiving an instruction for controlling the closing of the vacuum circuit breaker;
at least one pulse signal is sent to a driving circuit within the preset first-stage closing time, so that the driving circuit periodically drives a vacuum circuit breaker to perform first-stage closing;
within the preset second-stage closing time, sending a driving signal to a driving circuit to enable the driving circuit to drive a vacuum circuit breaker to perform second-stage closing;
the second stage closing time is after the first stage closing time;
the driving signal is a high level signal.
2. An electromagnetic drive control method according to claim 1, characterized by further comprising the step of:
and sending a holding signal to the driving circuit to enable the driving circuit to control the vacuum circuit breaker to keep a closing state.
3. An electromagnetic drive control method according to claim 1, wherein the duty ratio of the pulse signal is in the range of 0.2 to 0.6.
4. An electromagnetic drive control method according to claim 3, wherein the duty ratio of the pulse signal is 0.4.
5. An electromagnetic drive control method according to any one of claims 1, 3 or 4, wherein the pulse signal is a rectangular pulse signal.
6. The electromagnetic drive control method according to claim 1, wherein a sum of the first-stage closing time and the second-stage closing time is a fixed value.
7. A vacuum interrupter control apparatus comprising a drive circuit, a controller, a memory, and a computer program stored on and run on the memory, the controller being electrically connected to the drive circuit, the memory being electrically connected to the controller, the controller implementing the electromagnetic drive control method of any one of claims 1 to 6 when executing the computer program.
8. A storage medium characterized by storing computer-executable instructions for causing a computer to execute the electromagnetic drive control method according to any one of claims 1 to 6.
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| CN202011185835.0A CN112435891B (en) | 2020-10-30 | 2020-10-30 | Electromagnetic drive control method, vacuum circuit breaker control device, and storage medium |
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| CN109524252A (en) * | 2018-11-05 | 2019-03-26 | 东南大学 | A method of the inhibition permanent-magnet breaker closing rebound based on moving average filtering |
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| CN101262146B (en) * | 2008-04-24 | 2012-08-15 | 南京因泰莱配电自动化设备有限公司 | Wireless remote control open/close method of 24kV vacuum breaker and its breaker |
| CN101944445B (en) * | 2009-09-30 | 2014-06-04 | 江苏现代电力电容器有限公司 | Switching appliance for AC circuit |
| JP6064982B2 (en) * | 2014-12-12 | 2017-01-25 | 株式会社明電舎 | DC breaker |
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| CN109524252A (en) * | 2018-11-05 | 2019-03-26 | 东南大学 | A method of the inhibition permanent-magnet breaker closing rebound based on moving average filtering |
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