CN117138295A - Control method and device of frequency converter and frequency converter - Google Patents
Control method and device of frequency converter and frequency converter Download PDFInfo
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- CN117138295A CN117138295A CN202311270307.9A CN202311270307A CN117138295A CN 117138295 A CN117138295 A CN 117138295A CN 202311270307 A CN202311270307 A CN 202311270307A CN 117138295 A CN117138295 A CN 117138295A
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- 239000000779 smoke Substances 0.000 abstract description 20
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- 230000008569 process Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 7
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
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Abstract
The application discloses a control method and device of a frequency converter and the frequency converter, which are applied to the technical field of electronics. In the method, if the fire override function of the frequency converter is enabled, the controller monitors fire signals of the area to which the frequency converter belongs. If the fire signal is obtained, the frequency converter is controlled to enter a working state, and the control of the overheat protection signal is ignored. And then analyzing the current fire degree and adjusting the working frequency of the frequency converter according to the current fire degree. Compared with the original scheme of directly stopping the fire, the control scheme provided by the application can control the frequency converter to work continuously after the fire disaster occurs, so as to ensure that smoke in the building can be discharged in time and maintain the air quality in the building. In addition, the controller can also control the working frequency of the frequency converter according to the current fire degree, so that the smoke is discharged as much as possible, and the probability of safety accidents is reduced.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a method and an apparatus for controlling a frequency converter, and a frequency converter.
Background
The heating ventilation air conditioner is an air conditioner with heating, ventilation and air conditioning functions, and in practical application, the frequency converter controls the heating ventilation air conditioner fan equipment to work, and the frequency converter is an electric control equipment which applies a frequency conversion technology and a microelectronic technology and controls the alternating current motor by changing the frequency of a working power supply of the motor. The protection module is arranged on the common frequency converter, for example, when the working failure of the frequency converter leads to the temperature of the frequency converter to be higher than a preset value, the frequency converter can be stopped to avoid burning out the machine.
However, when a fire situation occurs in a scene such as a building, the frequency converter may not have a fault, but due to the fire, the protection module of the frequency converter may detect that the temperature of the frequency converter is too high, thereby controlling the shutdown of the frequency converter. However, under the scene of fire, a large amount of smoke exists in the building, and at the moment, a heating ventilation air conditioner fan is required to work for exhausting air, and the smoke cannot be timely exhausted due to the shutdown of the frequency converter, so that serious safety accidents are further caused.
Therefore, how to avoid the direct shutdown of the frequency converter in a fire scene is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The application aims to provide a control method and device of a frequency converter and the frequency converter, so as to solve the problem that smoke in a building cannot be discharged in time caused by direct shutdown of the frequency converter in a fire scene.
In order to solve the above technical problems, the present application provides a control method of a frequency converter, including:
if the fire override function of the frequency converter is enabled, monitoring fire signals of the area to which the frequency converter belongs;
if the fire signal is acquired, controlling the frequency converter to enter a working state and neglecting the control of an overheat protection signal;
analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
Preferably, said adjusting the operating frequency of the frequency converter according to the current fire level comprises:
determining a target working frequency of the frequency converter according to the current fire degree;
acquiring the current working frequency of the frequency converter;
if the current working frequency is higher than the target working frequency, reducing the working frequency of the frequency converter to the target working frequency;
and if the current working frequency is lower than the target working frequency, increasing the working frequency of the frequency converter to the target working frequency.
Preferably, the frequency converter comprises an operation input terminal and an up-conversion input terminal, and if the operation input terminal signal is valid and the up-conversion input terminal signal is invalid, the frequency converter operates at a first preset frequency; if the operation input terminal signal is valid and the frequency-raising input terminal signal is valid, the frequency converter works at a second preset frequency; if the running input terminal signal is invalid, stopping the frequency converter; wherein the second preset frequency is greater than the first preset frequency;
correspondingly, the adjusting the working frequency of the frequency converter according to the current fire degree comprises:
judging whether the current fire degree exceeds a preset level; wherein, the fire degree is divided into a plurality of grades in advance, and the higher the grade is, the more serious the fire is represented;
if not, transmitting an effective signal to the operation input terminal so as to control the frequency converter to work at the first preset frequency;
and if so, transmitting effective signals to the operation input terminal and the frequency-raising input terminal so as to control the frequency converter to work at the second preset frequency.
Preferably, the fire signal includes a level signal and a pulse signal;
if the fire signal is a level signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is acquired, controlling the frequency converter to enter a working state, neglecting control of an overheat protection signal, and recovering to a normal working mode after the fire signal fails;
if the fire signal is a pulse signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
and if the fire signal is acquired, controlling the frequency converter to enter a working state, neglecting control of the overheat protection signal, and maintaining the current state after the fire signal fails.
Preferably, if the fire signal is a level signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is obtained, controlling the frequency converter to enter a pending state, and monitoring the change condition of the fire signal;
if the fire signal is still valid after the first preset time period, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal;
and if the fire signal fails after the first preset time length, controlling the frequency converter to operate in a normal mode.
Preferably, the fire signal is transmitted by a peripheral fire detection device;
correspondingly, if the fire signal is a pulse signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is acquired, a fire confirmation signal is sent to the peripheral fire detection device, and a feedback signal of the peripheral fire detection device is monitored;
if the feedback signal of the peripheral fire detection device is not received within the second preset time period, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal;
and if the feedback signal of the peripheral fire detection device is received within the second preset time period, controlling the frequency converter to operate in a normal working mode.
Preferably, before the monitoring of the fire signal of the area to which the frequency converter belongs if the fire override function of the frequency converter is enabled, the method further comprises:
confirming a fire mode of the frequency converter according to the received selection instruction; the fire disaster modes of the frequency converter comprise a first fire disaster mode and a second fire disaster mode;
if the frequency converter is in the first fire mode, if the fire signal is acquired, controlling the frequency converter to enter a working state and ignoring the overheat protection signal includes:
if the fire signal is obtained, controlling the frequency converter to enter a working state, and ignoring the control of any protection signal;
if the frequency converter is in the second fire mode, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
and if the fire signal is acquired, controlling the frequency converter to enter a working state, and neglecting the control of any protection signal except the overvoltage protection signal and the overcurrent protection signal.
Preferably, a fire hazard zone bit is arranged in the controller for controlling the frequency converter;
correspondingly, after the step of controlling the frequency converter to enter a working state and ignoring the control of the overheat protection signal if the fire signal is acquired, the method further comprises the steps of:
setting the fire sign bit correspondingly, and representing that the frequency converter receives the fire signal after the fire sign bit is set.
In order to solve the technical problem, the application further provides a control device of the frequency converter, which comprises:
the monitoring module is used for monitoring fire signals of the area to which the frequency converter belongs if the fire override function of the frequency converter is enabled;
the control module is used for controlling the frequency converter to enter a working state and ignoring control of an overheat protection signal if the fire signal is acquired;
the analysis and adjustment module is used for analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
In order to solve the technical problem, the present application further provides a frequency converter, including: a memory for storing a computer program;
and the processor is used for realizing the steps of the control method of the frequency converter when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method for controlling a frequency converter described above.
According to the control method of the frequency converter, if the fire override function of the frequency converter is enabled, the controller monitors fire signals of the area to which the frequency converter belongs. When a fire disaster occurs, the controller can acquire a fire disaster signal, and if the fire disaster signal is acquired, the frequency converter is controlled to enter a working state and the control of the overheat protection signal is ignored. And then analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree. Compared with the original scheme that the frequency converter is directly stopped when heated in a fire disaster, the control scheme provided by the application can control the frequency converter to continuously work after the fire disaster occurs, so that smoke in a building can be timely discharged and the air quality in the building can be maintained. In addition, the controller can also control the working frequency of the frequency converter according to the current fire degree, so that the smoke is discharged as much as possible, and the probability of safety accidents is reduced.
The application also provides a control device of the frequency converter, the frequency converter and a computer readable storage medium, which correspond to the method, and have the same beneficial effects as the method.
Drawings
For a clearer description of embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a flowchart of a control method of a frequency converter according to an embodiment of the present application;
fig. 2 is a block diagram of a control system of a frequency converter according to an embodiment of the present application;
fig. 3 is a flowchart of a software function implemented by a frequency converter according to an embodiment of the present application;
fig. 4 is a block diagram of a control device of a frequency converter according to an embodiment of the present application;
fig. 5 is a block diagram of a frequency converter according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
The application provides a control method and device of a frequency converter and the frequency converter, and aims to solve the problem that smoke in a building cannot be discharged in time due to direct shutdown of the frequency converter in a fire scene.
In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.
In order to timely remove smoke or maintain air quality in a building when a fire accident occurs in the building, the frequency converter is required to operate for as long as possible, so that the embodiment of the application provides a control method of the frequency converter. Fig. 1 is a flowchart of a control method of a frequency converter according to an embodiment of the present application; as shown in fig. 1, the method comprises the steps of:
s10: if the fire override function of the frequency converter is enabled, monitoring a fire signal of the region to which the frequency converter belongs.
S12: if the fire signal is obtained, the frequency converter is controlled to enter a working state, and the control of the overheat protection signal is ignored.
S13: analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
The frequency converter is mainly applied to emergency scenes such as fire and the like, is used for controlling the heating ventilation air conditioning fan equipment, and realizes the switching and speed regulation of the heating ventilation air conditioning fan equipment. The fire override function of the frequency converter is a mode proposed for a fire, when the fire override function of the frequency converter is not enabled, the controller can control the frequency converter to operate in a normal working mode, and when the fire override function of the frequency converter is enabled, the controller starts to monitor fire signals. The peripheral fire detection device is generally arranged in the area where the frequency converter belongs, and can send fire signals to the controller of the frequency converter after detecting the occurrence of a fire, the specific type and the number of the peripheral fire detection device are not limited, and the peripheral fire detection device can be a temperature sensor, a smoke detector and the like, and after the occurrence of the fire, the temperature in the area can rise, smoke can be generated along with the temperature, and when the temperature rises to a certain value or the concentration of the smoke reaches a certain value, the occurrence of the fire can be set. The temperature sensor and the smoke detector can be independently arranged and independently detected, and the temperature sensor and the smoke detector can be matched for use, so that the detection result is more accurate. Fig. 2 is a block diagram of a control system of a frequency converter according to an embodiment of the present application; the peripheral fire detection device specifically adopts a temperature sensor, as shown in fig. 2, the temperature sensor 1, the controller 2 and the frequency converter 3 are sequentially connected, and the temperature sensor 1 is used for monitoring the temperature of the area where the frequency converter 3 belongs. If the fire override function of the frequency converter 3 is enabled, when the temperature sensor 1 detects that the ambient temperature is too high, it indicates that a fire has occurred in the area, and at this time, the temperature sensor 1 sends a fire signal to the controller 2, and the controller 2 controls the frequency converter 3 to enter a fire mode, that is, the frequency converter 3 enters an operating state and ignores the control of the overheat protection signal (other protection signals may also be included, not limited herein). When the frequency converter 3 operates in a normal working mode, the frequency converter 3 can overheat after a fire disaster occurs, and the controller 2 can send overheat protection signals to control the frequency converter 3 to stop; the frequency converter 3 under the fire override function can keep working after the fire occurs and stop without being controlled by the overheat protection signal. If a fire accident occurs in a building, the frequency converter provided by the embodiment of the application can not be stopped due to overheat and the like, so that the fan equipment of the heating ventilation air conditioner can be ensured to run for a long time as much as possible, and the purposes of removing smoke or maintaining the air quality in the building are achieved. In addition, the frequency converter can set up different fire modes according to the fire control demand, automatically regulated frequency converter output frequency or rotational speed.
It should be noted that, in the above embodiment, the frequency converter is only limited to the fire mode and is not controlled by the overheat protection signal to stop, but is not limited to how the frequency converter works in the fire mode, the frequency converter may include a plurality of different fire modes, and may enter the corresponding fire mode according to the preset instruction stored in the controller when the fire occurs, and the staff may adjust the fire mode of the frequency converter at any time. For example, the fire modes may specifically include a first fire mode and a second fire mode, the frequency converter is not controlled by any signal to stop in the first fire mode, the frequency converter is not controlled by any other signal except the overcurrent and overvoltage protection signal to stop in the second fire mode, and the staff can select the corresponding fire mode according to the actual requirement.
In addition, the fire signal transmitted from the peripheral fire detection device may be a level signal (hold input signal) or a pulse signal (transient signal), and when the fire signal is a level signal, the frequency converter maintains the fire mode when the fire signal is received and exits the fire mode after the fire signal is not received. When the fire signal is a level signal, the frequency converter is in a fire mode as long as the fire signal exists; if the fire signal is cancelled, the frequency converter exits the fire mode and operates in a normal mode. The normally open or normally closed mode of operation depends on the polarity selection of the terminals. After the frequency converter exits the fire mode, if the frequency converter fails, the frequency converter can be normally reported to stop. When the fire signal is a pulse signal, the frequency converter enters a fire mode after receiving the fire signal and still maintains the fire mode after not receiving the fire signal. I.e. the pulse signal down converter is started by an input transient signal, the normally open or normally closed mode of operation being selected depending on the polarity of the terminals. After receiving the pulse signal, the frequency converter will run at a preset speed, even if the pulse signal is lost (it can be considered that the signal is broken due to fire damage). The frequency converter will remain in fire mode until failure or power failure and the frequency converter should maintain the direction of rotation before the fire mode occurs. Furthermore, after exiting the fire mode, if the operator turns off the frequency converter and powers it on again, the frequency converter should operate normally if the fire mode signal is not activated at this time.
After an actual fire disaster occurs, the working frequency of the frequency converter is not particularly required, and the frequency converter can be fully operated at the rated frequency of the motor. In general, in order to make the frequency converter operate for a longer time and have better air exhaust effect, the working frequency of the frequency converter may be positively related to the current fire degree, for example, the current fire degree may be determined, and whether the current fire degree exceeds a preset level may be judged, if not, the frequency converter is controlled to work at a first preset frequency; if yes, controlling the frequency converter to work at a second preset frequency; the fire degree is divided into a plurality of levels in advance, for example, the severity of the fire can be divided into 5 levels according to the temperature or the smoke concentration in practical application, and the higher the level (i.e. the higher the temperature or the more dense the smoke), the more serious the fire, the preset level can be set to 3; the second preset frequency is greater than the first preset frequency. Based on the scheme thought, the frequency converter can be additionally provided with an up-conversion input terminal, and if the current fire degree meets the preset requirement, the signal of the up-conversion input terminal is effective. In addition, the operational input terminal of the frequency converter is used to determine whether the frequency converter is operating (e.g., in fire mode, the operational input terminal signal of the frequency converter is active). When the running input terminal signal is effective and the frequency-increasing input terminal signal is effective, controlling the frequency converter to run at a second preset frequency; when the signal of the operation input terminal is effective, but the frequency-raising input terminal is ineffective, controlling the frequency converter to operate at a first preset frequency; if the operation input terminal is invalid, the frequency converter is stopped in a decelerating way. If the frequency converter is in the shutdown process, the up-conversion input terminal is in a high level (effective), and then if the operation input terminal is effective, the frequency converter is accelerated to a second preset frequency operation until the up-conversion input terminal signal is invalid or the operation input terminal signal is invalid. The above-mentioned up-conversion input terminal and the operation input terminal are terminals on the frequency converter for receiving corresponding signals respectively, and after the respective effective signals are input, the corresponding terminals are effective.
Here, taking the scheme of the above embodiment as an example, an actual operation situation of the frequency converter of this embodiment will be described in detail. Fig. 3 is a flowchart of a software function implemented by a frequency converter according to an embodiment of the present application; as shown in fig. 3, the method specifically comprises the following steps: s20: judging whether to enter a fire mode; if not, the process proceeds to step S21, and if yes, the process proceeds to step S22. S21: the frequency converter operates in a normal mode. S22: and judging whether to enter the first fire mode or the second fire mode according to the internal setting instruction. S23: judging whether the up-conversion input terminal signal is valid or not; if not, the process proceeds to step S24, and if yes, the process proceeds to step S25. S24: the frequency converter operates at a first preset frequency. S25: the frequency converter operates at a second preset frequency.
According to the control method of the frequency converter, if the fire override function of the frequency converter is enabled, the controller monitors fire signals of the area where the frequency converter belongs. When a fire disaster occurs, the controller can acquire a fire disaster signal, and if the fire disaster signal is acquired, the frequency converter is controlled to enter a working state and the control of the overheat protection signal is ignored. And then analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree. Compared with the original scheme that the frequency converter is directly stopped when heated in a fire disaster, the control scheme provided by the embodiment of the application can control the frequency converter to continuously work after the fire disaster occurs, so that smoke in a building can be timely discharged and the air quality in the building can be maintained. In addition, the controller can also control the working frequency of the frequency converter according to the current fire degree, so that the smoke is discharged as much as possible, and the probability of safety accidents is reduced.
After an actual fire disaster occurs, the working frequency of the frequency converter is not particularly required, and the working frequency of the frequency converter can be controlled to be positively related to the current fire disaster degree. The embodiment of the application provides a scheme, which comprises the following steps of: and determining the target working frequency of the frequency converter according to the current fire degree, and acquiring the current working frequency of the frequency converter. If the current working frequency is higher than the target working frequency, reducing the working frequency of the frequency converter to the target working frequency; and if the current working frequency is lower than the target working frequency, the working frequency of the frequency converter is increased to the target working frequency. For example, two preset frequencies may be set in practical application, which are a first preset frequency and a second preset frequency, respectively, and the second preset frequency is greater than the first preset frequency. Assuming that the frequency converter comprises an operation input terminal and an up-conversion input terminal, if the operation input terminal signal is valid and the up-conversion input terminal signal is invalid, the frequency converter works at a first preset frequency; if the running input terminal signal is effective and the frequency-increasing input terminal signal is effective, the frequency converter works at a second preset frequency; if the run input terminal signal is not valid, the frequency converter is shut down. And correspondingly, adjusting the working frequency of the frequency converter according to the current fire degree comprises: if the current fire degree does not meet the preset requirement, an effective signal is sent to an operation input terminal so as to control the frequency converter to work at a first preset frequency; if the current fire degree meets the preset requirement, effective signals are sent to the operation input terminal and the frequency-raising input terminal so as to control the frequency converter to work at a second preset frequency; the current fire degree meets the preset requirement to represent that the fire degree is more serious at the moment, and the frequency converter is required to operate at a higher frequency so as to timely discharge smoke in the corridor. However, it should be noted that the scheme provided in the embodiment of the present application is only one example of the present application, and the number of preset frequencies, the magnitude of the preset frequencies, and the like are not limited in practical application, and may be set according to practical requirements.
In the above embodiment, the fire signal may be a level signal or a pulse signal, and if the fire signal is a level signal, the controller controls the frequency converter to enter the working state after acquiring the fire signal and ignores the control of the overheat protection signal, and resumes the normal working mode after the fire signal fails. If the fire signal is a pulse signal, the controller controls the frequency converter to enter a working state after acquiring the fire signal, ignores the control of the overheat protection signal, and maintains the current state after the fire signal fails. When the fire signal is a level signal, the frequency converter is in a fire mode as long as the fire signal exists; if the fire signal fails, the frequency converter exits the fire mode and operates in a normal operating mode. When the fire signal is a pulse signal, the frequency converter is started by the input instantaneous signal, and after the pulse signal is received, the frequency converter operates at a preset speed, and even if the pulse signal disappears again (the signal can be considered to be broken due to fire damage), the frequency converter still operates at the preset speed.
In practical application, the fire signal may be triggered by mistake, so that the fire signal needs to be verified, and the frequency converter is prevented from entering a fire mode when a fire does not occur. The verification schemes in both cases where the fire signal is a level signal or a pulse signal are explained below. First, if the fire signal is a level signal, if the fire signal is acquired, the control of controlling the frequency converter to enter a working state and ignoring the overheat protection signal includes: if the fire signal is obtained, controlling the frequency converter to enter a pending state, and monitoring the change condition of the fire signal; if the fire signal is still valid after the first preset time period, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal; and if the fire signal fails after the first preset time length, controlling the frequency converter to operate in a normal mode. I.e. the level signal is only valid for a short time, it is likely to be a false trigger, when the frequency converter does not enter fire mode. Secondly, limiting the fire signal to be sent by the peripheral fire detection device, correspondingly, if the fire signal is a pulse signal, if the fire signal is acquired, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal comprises the following steps: if the fire signal is obtained, a fire confirmation signal is sent to the peripheral fire detection device, and a feedback signal of the peripheral fire detection device is monitored; if the feedback signal of the peripheral fire detection device is not received within the second preset time period, the frequency converter is controlled to enter a working state, and the control of the overheat protection signal is ignored; and if the feedback signal of the peripheral fire detection device is received within the second preset time period, controlling the frequency converter to operate in a normal working mode. Because the pulse signal is triggered instantaneously and cannot be verified for a valid period of time, the controller sends a fire confirmation signal to the peripheral fire detection device, which sends a feedback signal when no fire occurs, indicating false triggering. And when a fire disaster occurs, the peripheral fire disaster detection device does not send any feedback signal, and the frequency converter can enter a fire disaster mode after the second preset duration. This is because if the peripheral fire detection device sends a feedback signal to indicate the occurrence of a fire, the signal transmission may fail due to the influence of the fire, so that the controller of the frequency converter cannot receive the signal, and the frequency converter cannot enter the fire mode after the occurrence of the fire. In addition, the specific length of the first preset duration and the second preset duration is not limited.
In the foregoing embodiments, the fire mode of the frequency converter is not particularly limited, and embodiments of the present application provide a specific implementation manner, where the fire mode includes a first fire mode and a second fire mode, and the frequency converter enters a corresponding fire mode according to a setting instruction. In the first fire mode, the frequency converter is not controlled by any external signal and internal alarm signal, and the frequency converter continuously operates until being burnt or the power supply is cut off. If the frequency converter is powered off and not burned out in a fire, when restarting the frequency converter again, the frequency converter will be able to operate in normal mode again if the fire mode is not entered. In the second fire mode, the frequency converter is not controlled by any external signal and other internal alarm signals except that the frequency converter is stopped when receiving the overcurrent and overvoltage protection signals, and the frequency converter continuously operates until being burnt or the power supply is cut off. If the frequency converter is powered off and not burned out in a fire, when restarting the frequency converter again, the frequency converter will be able to operate in normal mode again if the fire mode is not entered. The embodiment of the application provides a specific scheme that before monitoring a fire signal of a region to which the frequency converter belongs if a fire override function of the frequency converter is enabled, a controller confirms a fire mode of the frequency converter according to a received selection instruction; if the frequency converter is in the first fire mode, the controller can control the frequency converter to enter a working state if acquiring a fire signal, and control of any protection signal is ignored. If the frequency converter is in the second fire mode, if the controller acquires the fire signal, the frequency converter is controlled to enter a working state, and the control of any protection signal except the overvoltage protection signal and the overcurrent protection signal is ignored.
In addition, during practical application, a fire sign bit can be set, after a fire signal is acquired, the frequency converter is controlled to enter a fire mode, the condition that the frequency converter enters the fire mode is recorded by setting the fire sign bit, the frequency converter is characterized to enter the fire mode, and the frequency of the frequency converter entering the fire mode can be recorded, so that the frequency converter is convenient for workers to acquire historical data.
In the above embodiments, the control method of the frequency converter is described in detail, and the application also provides a control device of the frequency converter and a corresponding embodiment of the frequency converter. It should be noted that the embodiments of the device and the frequency converter part are described in terms of two aspects, one based on the functional module and the other based on hardware.
Based on the angle of the functional module, this embodiment provides a control device for a frequency converter, fig. 4 is a structural diagram of the control device for a frequency converter provided by the embodiment of the present application, as shown in fig. 4, where the device includes:
the monitoring module 11 is configured to monitor a fire signal of an area to which the frequency converter belongs if a fire override function of the frequency converter is enabled;
the control module 12 is used for controlling the frequency converter to enter a working state and ignoring the control of the overheat protection signal if the fire signal is acquired;
the analyzing and adjusting module 13 is used for analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
The control device of the frequency converter provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.
Based on the hardware angle, this embodiment provides a frequency converter, fig. 5 is a block diagram of the frequency converter provided by an embodiment of the present application, as shown in fig. 5, where the frequency converter includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the control method of the frequency converter as mentioned in the above embodiments when executing a computer program.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, DSP), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU) for taking care of rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, where the computer program, when loaded and executed by the processor 21, is capable of implementing the relevant steps of the control method of the frequency converter disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, data related to a control method of the frequency converter, etc.
In some embodiments, the frequency converter may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
Those skilled in the art will appreciate that the configuration shown in the figures is not limiting and may include more or fewer components than shown.
The frequency converter provided by the embodiment of the application comprises a memory and a processor, wherein the processor can realize the following method when executing a program stored in the memory: a control method of a frequency converter.
The frequency converter provided by the embodiment corresponds to the method, so that the frequency converter has the same beneficial effects as the method.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution contributing to the prior art, or may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The computer readable storage medium provided in the present embodiment corresponds to the above method, and thus has the same advantageous effects as the above method.
The control method and device of the frequency converter and the frequency converter provided by the application are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A control method of a frequency converter, comprising:
if the fire override function of the frequency converter is enabled, monitoring fire signals of the area to which the frequency converter belongs;
if the fire signal is acquired, controlling the frequency converter to enter a working state and neglecting the control of an overheat protection signal;
analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
2. The method of controlling a frequency converter according to claim 1, wherein said adjusting an operating frequency of the frequency converter according to the current fire degree comprises:
determining a target working frequency of the frequency converter according to the current fire degree;
acquiring the current working frequency of the frequency converter;
if the current working frequency is higher than the target working frequency, reducing the working frequency of the frequency converter to the target working frequency;
and if the current working frequency is lower than the target working frequency, increasing the working frequency of the frequency converter to the target working frequency.
3. The method according to claim 2, wherein the frequency converter includes an operation input terminal and an up-conversion input terminal, and the frequency converter operates at a first preset frequency if the operation input terminal signal is valid and the up-conversion input terminal signal is not valid; if the operation input terminal signal is valid and the frequency-raising input terminal signal is valid, the frequency converter works at a second preset frequency; if the running input terminal signal is invalid, stopping the frequency converter; wherein the second preset frequency is greater than the first preset frequency;
correspondingly, the adjusting the working frequency of the frequency converter according to the current fire degree comprises:
judging whether the current fire degree exceeds a preset level; wherein, the fire degree is divided into a plurality of grades in advance, and the higher the grade is, the more serious the fire is represented;
if not, transmitting an effective signal to the operation input terminal so as to control the frequency converter to work at the first preset frequency;
and if so, transmitting effective signals to the operation input terminal and the frequency-raising input terminal so as to control the frequency converter to work at the second preset frequency.
4. A control method of a frequency converter according to any one of claims 1 to 3, wherein the fire signal includes a level signal and a pulse signal;
if the fire signal is a level signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is acquired, controlling the frequency converter to enter a working state, neglecting control of an overheat protection signal, and recovering to a normal working mode after the fire signal fails;
if the fire signal is a pulse signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
and if the fire signal is acquired, controlling the frequency converter to enter a working state, neglecting control of the overheat protection signal, and maintaining the current state after the fire signal fails.
5. The control method according to claim 4, wherein if the fire signal is a level signal, the controlling the frequency converter to enter an operating state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is obtained, controlling the frequency converter to enter a pending state, and monitoring the change condition of the fire signal;
if the fire signal is still valid after the first preset time period, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal;
and if the fire signal fails after the first preset time length, controlling the frequency converter to operate in a normal mode.
6. The method of controlling a frequency converter according to claim 4, wherein the fire signal is transmitted by a peripheral fire detection device;
correspondingly, if the fire signal is a pulse signal, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
if the fire signal is acquired, a fire confirmation signal is sent to the peripheral fire detection device, and a feedback signal of the peripheral fire detection device is monitored;
if the feedback signal of the peripheral fire detection device is not received within the second preset time period, controlling the frequency converter to enter a working state and neglecting the control of the overheat protection signal;
and if the feedback signal of the peripheral fire detection device is received within the second preset time period, controlling the frequency converter to operate in a normal working mode.
7. The control method of a frequency converter according to claim 1, further comprising, before the monitoring of a fire signal of a region to which the frequency converter belongs if the fire override function of the frequency converter is enabled:
confirming a fire mode of the frequency converter according to the received selection instruction; the fire disaster modes of the frequency converter comprise a first fire disaster mode and a second fire disaster mode;
if the frequency converter is in the first fire mode, if the fire signal is acquired, controlling the frequency converter to enter a working state and ignoring the overheat protection signal includes:
if the fire signal is obtained, controlling the frequency converter to enter a working state, and ignoring the control of any protection signal;
if the frequency converter is in the second fire mode, the controlling the frequency converter to enter a working state and ignoring the overheat protection signal if the fire signal is acquired includes:
and if the fire signal is acquired, controlling the frequency converter to enter a working state, and neglecting the control of any protection signal except the overvoltage protection signal and the overcurrent protection signal.
8. The control method of a frequency converter according to claim 1, wherein a fire flag bit is provided inside a controller itself that controls the frequency converter;
correspondingly, after the step of controlling the frequency converter to enter a working state and ignoring the control of the overheat protection signal if the fire signal is acquired, the method further comprises the steps of:
setting the fire sign bit correspondingly, and representing that the frequency converter receives the fire signal after the fire sign bit is set.
9. A control device for a frequency converter, comprising:
the monitoring module is used for monitoring fire signals of the area to which the frequency converter belongs if the fire override function of the frequency converter is enabled;
the control module is used for controlling the frequency converter to enter a working state and ignoring control of an overheat protection signal if the fire signal is acquired;
the analysis and adjustment module is used for analyzing the fire signal to determine the current fire degree of the area to which the frequency converter belongs, and adjusting the working frequency of the frequency converter according to the current fire degree.
10. A frequency converter comprising a memory for storing a computer program;
processor for implementing the steps of the control method of a frequency converter according to any one of claims 1 to 8 when executing said computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311270307.9A CN117138295A (en) | 2023-09-27 | 2023-09-27 | Control method and device of frequency converter and frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311270307.9A CN117138295A (en) | 2023-09-27 | 2023-09-27 | Control method and device of frequency converter and frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117138295A true CN117138295A (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311270307.9A Pending CN117138295A (en) | 2023-09-27 | 2023-09-27 | Control method and device of frequency converter and frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117138295A (en) |
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2023
- 2023-09-27 CN CN202311270307.9A patent/CN117138295A/en active Pending
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