CN116436373A - Motor current control method and device and engineering equipment - Google Patents
Motor current control method and device and engineering equipment Download PDFInfo
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- CN116436373A CN116436373A CN202310213228.8A CN202310213228A CN116436373A CN 116436373 A CN116436373 A CN 116436373A CN 202310213228 A CN202310213228 A CN 202310213228A CN 116436373 A CN116436373 A CN 116436373A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
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Abstract
The embodiment of the invention provides a motor current control method, a motor current control device and engineering equipment, belongs to the technical field of electromechanical control, and is applied to the engineering equipment, wherein a motor of the engineering equipment is connected with a power supply through a cable drum, and the method comprises the following steps: acquiring the current winding drum number of turns of the cable winding drum, the current ambient temperature and the temperature rise value of the winding drum in a preset time period; and determining the current maximum value of the motor according to the current winding drum number, the current ambient temperature, the temperature rise value and the core number of the winding drum cable, and controlling the current of the motor not to exceed the current maximum value. By the method, when engineering equipment works by utilizing the kinetic energy provided by the motor, the maximum value of the motor current can be accurately determined according to a plurality of parameters, the motor current is controlled not to exceed the maximum value of the current, the overheating of the cable drum is avoided, the safety in the working process of the engineering equipment is ensured, and the service life of the cable drum is prolonged.
Description
Technical Field
The invention relates to the technical field of electromechanical control, in particular to a motor current control method, a motor current control device and engineering equipment.
Background
Currently, engineering equipment for engineering work like a crane, an excavator, and the like is successively started to perform a transformation from diesel engine-powered to electric motor-powered, so that plug-in products including cable reels are widely used. The cable drum is used for connecting an external power supply with a motor of engineering equipment, so that the motor of the engineering equipment can obtain power supply when controlling the engineering equipment to operate. However, the cable diameter (determined by the core number of the cable), the cable temperature, the number of winding layers and the temperature of the environment of the cable drum all have an influence on the maximum current carrying capacity of the cable drum, if the current in the cable exceeds the maximum current carrying capacity, the cable drum can overheat, the engineering equipment cannot normally operate, the service life of the cable is seriously influenced, and potential safety hazards may exist.
Disclosure of Invention
The embodiment of the application aims to solve the problem that the current of a motor of engineering equipment cannot be reasonably controlled to cause overheating of a cable drum in the prior art, and provides a motor current control method, a motor current control device and engineering equipment.
The first aspect of the application provides a motor current control method, which is applied to engineering equipment, wherein a motor of the engineering equipment is connected with a power supply through a cable drum, and the method comprises the following steps:
acquiring the current winding drum number of turns of the cable winding drum, the current ambient temperature and the temperature rise value of the winding drum in a preset time period;
determining the current maximum value of the motor according to the current winding drum number of turns, the current ambient temperature, the temperature rise value and the core number of the winding drum cable;
the current of the motor is controlled not to exceed a current maximum.
In one embodiment of the present application, determining a current maximum value for the motor based on a current number of windings of the spool, a current ambient temperature, a temperature rise value, and a core number of the spool cable includes:
determining a first coefficient according to the current winding drum number;
determining a second coefficient according to the core number;
determining a third coefficient according to the current ambient temperature;
determining a fourth coefficient according to the temperature rise value;
and determining the maximum value of the current according to the first coefficient, the second coefficient, the third coefficient and the fourth coefficient and the rated current-carrying capacity of the cable.
In one embodiment of the present application, determining the first coefficient based on the current number of windings of the spool includes:
determining the number of layers of the cable of the current winding drum according to the number of turns of the current winding drum;
under the condition that the number of the layers of the current reel cable is smaller than a layer number threshold value, determining a first coefficient according to the number of the layers of the current reel cable, the layer number threshold value and a first coefficient original value;
and determining the first coefficient as a first preset value under the condition that the number of the layers of the current reel cable is larger than or equal to the threshold value of the number of the layers.
In one embodiment of the present application, determining the second coefficient based on the core count includes:
determining a coefficient corresponding to the core number according to a first preset function, wherein the first preset function comprises:
wherein a is 2 Is the second coefficient, n 2 Is the core number.
In one embodiment of the present application, determining the third coefficient based on the current ambient temperature includes:
determining a coefficient corresponding to the current ambient temperature according to a second preset function, wherein the second preset function comprises:
wherein a is 3 Is a third coefficient, n 3 Is the current ambient temperature.
In one embodiment of the present application, determining the fourth coefficient from the temperature increase value includes:
under the condition that the temperature rise value is larger than the temperature rise threshold value, determining a fourth coefficient according to the difference value between the temperature rise value and the temperature rise threshold value;
and determining the fourth coefficient as a second preset value under the condition that the temperature rise value is smaller than or equal to the temperature rise threshold value.
In one embodiment of the present application, obtaining a current number of turns of the cable drum, a current ambient temperature, and a temperature increase value of the drum over a preset time includes:
acquiring the current winding drum number of turns through a winding drum encoder;
acquiring the current ambient temperature through a ring temperature sensor;
the temperature rise value is obtained by a drum temperature sensor.
The second aspect of the present application provides a motor current control device, applied to engineering equipment, the motor of the engineering equipment is connected with a power supply through a cable drum, the device comprises:
the current parameter acquisition module is used for acquiring the current winding drum number of turns of the cable winding drum, the current environment temperature and the temperature rise value of the winding drum in a preset time period;
the current maximum value determining module is used for determining the current maximum value of the motor according to the current winding drum number, the current ambient temperature, the temperature rise value and the core number of the cable;
a current control module for controlling the current of the motor not to exceed the maximum current value
A third aspect of the present application provides an engineering apparatus comprising:
the motor is connected with the power supply through a cable drum and used for controlling engineering equipment to operate;
and a processor, configured to execute the motor current control method provided in the first aspect of the present application.
A fourth aspect of the present application provides a computer readable storage medium having instructions stored thereon which, when executed by a processor, cause the processor to be configured to perform the motor current control method provided in the first aspect of the present application.
Through the technical scheme, when engineering equipment works by utilizing kinetic energy provided by the motor, the processor can acquire a plurality of parameters related to the maximum current-carrying capacity of the cable drum: the current winding drum number of turns, the current ambient temperature, the temperature rise value of the winding drum in a preset time period and the core number of the winding drum cable are determined accurately according to the parameters, the current of the motor is controlled not to exceed the current maximum value, overheating of the cable winding drum is avoided, safety in the operation process of engineering equipment is guaranteed, and the service life of the cable winding drum is prolonged.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
fig. 1 shows a schematic flow chart of a motor current control method according to an embodiment of the present application;
FIG. 2 illustrates a logic diagram of a motor current control method according to an embodiment of the present application;
fig. 3 shows a schematic structural diagram of a motor current control device according to an embodiment of the present application.
Detailed Description
The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.
It should be noted that, in the embodiment of the present application, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain the relative positional relationship between the components, the direction change condition, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
Fig. 1 schematically illustrates a flowchart of a brake control method according to an embodiment of the present application, as illustrated in fig. 1, in an embodiment of the present application, a motor current control method is provided, applied to engineering equipment, the motor of which is connected to a power source through a cable drum, and the method may include steps S100 to S300.
The existing engineering equipment used for engineering operations like cranes, excavators and the like is sequentially combined with two power modes of diesel engine power supply and motor power supply, for example, when the engineering equipment is in a running state, the diesel engine is used for supplying power, the engineering equipment is not in the running state, when the upper assembly parts are used for engineering operations like excavation, hoisting and the like, the plug-in switch is pressed down to be switched to an electric mode, the motor is electrified, and the motor is used for supplying power. Because the engineering equipment does not move in position when in operation, no extra cost is required to be added for the engineering equipment, the engineering equipment can be directly connected with an external power supply through a cable drum when in operation, and the current of the motor when in operation is the current borne by the cable of the cable drum.
However, the maximum current-carrying capacity of the cable drum is affected by various parameters, so that the current of the motor is ensured not to exceed the rated current-carrying capacity of the cable drum, the current drum cannot be ensured not to be overheated, and the current of the motor needs to be controlled by combining various parameters to prevent the overheating of the cable drum.
Step S100: acquiring the current winding drum number of turns of the cable winding drum, the current ambient temperature and the temperature rise value of the winding drum in a preset time period;
step S200: determining the current maximum value of the motor according to the current winding drum number of turns, the current ambient temperature, the temperature rise value and the core number of the winding drum cable;
step S300: the current of the motor is controlled not to exceed a current maximum.
Fig. 2 is a logic schematic diagram of a motor current control method according to an embodiment of the present application, please refer to fig. 1 and 2 together, because engineering equipment needs to operate under a non-driving state and use a motor to provide power for operation, before acquiring multiple parameters, whether the engineering equipment is in a driving state and whether the motor is powered on is firstly determined, when it is detected that a plug-in switch of the engineering equipment is in an on state (i.e. the motor is powered on) and the engineering equipment is in a non-driving state, a processor acquires a current winding drum number of winding drums, a current ambient temperature and a temperature rise value of the winding drums in a preset time period, and then determines a maximum current carrying capacity of the winding drums, that is, a current maximum value of the motor according to the current winding drum number of winding drums, the current ambient temperature, the temperature rise value and the core number of winding drum cables, and controls the current of the motor not to exceed the current maximum value by properly adjusting various operating parameters of the motor.
The current winding drum number of the cable winding drum, the current ambient temperature, the temperature rise value and the core number of the winding drum cable are all parameters related to the maximum current carrying capacity of the cable winding drum, the current maximum value of the motor is determined according to the parameters, and the current of the motor is controlled not to exceed the maximum value, so that various potential safety hazards caused by overheating of the cable winding drum are avoided.
In one embodiment of the present application, determining a current maximum value for the motor based on a current number of windings of the spool, a current ambient temperature, a temperature rise value, and a core number of the spool cable includes:
determining a first coefficient according to the current winding drum number;
determining a second coefficient according to the core number;
determining a third coefficient according to the current ambient temperature;
determining a fourth coefficient according to the temperature rise value;
and determining the maximum value of the current according to the first coefficient, the second coefficient, the third coefficient and the fourth coefficient and the rated current-carrying capacity of the cable.
Because the current winding drum number of the cable winding drum, the current ambient temperature, the temperature rise value and the core number of the cable are all related to the maximum current carrying capacity of the cable winding drum, a plurality of corresponding coefficients are determined according to a plurality of parameters, and the maximum current carrying capacity of the cable, namely the current maximum value of the motor, is determined by using the determined coefficients and the rated current carrying capacity of the cable.
In one embodiment of the present application, determining the first coefficient based on the current number of windings of the spool and the current includes:
determining the number of layers of the cable of the current winding drum according to the number of turns of the current winding drum;
under the condition that the number of the layers of the current reel cable is smaller than a layer number threshold value, determining a first coefficient according to the number of the layers of the current reel cable, the layer number threshold value and a first coefficient original value;
and determining the first coefficient as a first preset value under the condition that the number of the layers of the current reel cable is larger than or equal to the threshold value of the number of the layers.
The heat dissipation effect of the cable reel can be affected by the number of the cable layers of the reel, the larger the number of the cable layers of the reel is, the more difficult the cable layers close to the bottom layer are to dissipate heat, and therefore the larger the number of the cable layers of the reel is, the smaller the maximum current-carrying capacity of the cable reel is.
The number of layers of the reel cable can be determined by the number of turns of the reel. The number of winding drum turns, namely the number of winding drum turns of the cable wound on the winding drum, is fixed because the fixed form of the cable winding drum is unchanged, so that the radius parameter of the cable winding drum is known and fixed, the number of winding drum turns of each layer of windable cable is also a parameter which can be determined in advance, and after the current winding drum turns are obtained by the processor, the number of current winding drum turns and the known parameters can be used for determining the number of current winding drum cable layers.
It is noted that when the cable is wound on the drum, the drum radius increases for every more layer of the winding drum, but the drum radius increases by a negligible amount for the drum radius itself, so the radius of each layer of the cable drum can be regarded as the same value.
After the processor obtains the number of the current cable layers of the winding drum, judging the size relation between the number of the current cable layers of the winding drum and a set number of layer threshold, and if the number of the current cable layers of the winding drum is smaller than the number of layer threshold, calculating by using the number of the current cable layers of the winding drum, the number of layer threshold and a preset first coefficient original value through the following formula to obtain a first coefficient:
wherein a is 1 For the first coefficient, m is the layer number threshold, n 1 For the current number of cable layers of the drum, a is the original value of the first coefficient.
If the current number of layers of the cable drum is greater than or equal to the number of layers threshold, the first coefficient may be set directly to a first preset value, illustratively, 1.
It can be understood by those skilled in the art that the above formula (1), the layer number threshold value, the first preset value of the first coefficient original value may be reasonably determined by testing the heating condition of the cable drum during operation of the engineering equipment, technical reference materials, and the safety design requirement of the cable drum, which is not limited in this application.
In one embodiment of the present application, determining the second coefficient based on the core count includes:
determining a coefficient corresponding to the core number according to a first preset function, wherein the first preset function comprises:
wherein a is 2 Is the second coefficient, n 2 Is the core number.
The number of cores of the cable is related to the wire diameter of the cable, and the larger the number of cores, the larger the wire diameter, that is, the larger the resistance of the cable, and the higher the heat generated when the same current is passed. The larger the wire diameter, the smaller the maximum current-carrying capacity of the cable drum, considering the operational safety of the cable drum.
The coefficient corresponding to the core number, that is, the second coefficient, may be determined by searching a preset correspondence table, or may be determined by a first preset function expressed by the formula (2).
It can be appreciated by those skilled in the art that the first preset function can be reasonably adjusted and changed by testing the heating condition of the cable drum during operation of the engineering equipment, technical reference materials and safety design requirements of the cable drum.
In one embodiment of the present application, determining the third coefficient based on the current ambient temperature includes:
determining a coefficient corresponding to the current ambient temperature according to a second preset function, wherein the second preset function comprises:
wherein a is 3 Is a third coefficient, n 3 Is the current ambient temperature.
The heat dissipation effect of the cable drum can be affected by the ambient temperature, and the heat dissipation is worse when the ambient temperature is higher, so that the maximum current carrying value of the cable drum is also reduced when the ambient temperature is higher.
The coefficient corresponding to the current ambient temperature, namely the third coefficient, can be determined by searching a preset corresponding relation table, and can also be determined by a second preset function expressed by a formula (3).
It will be appreciated by those skilled in the art that the second predetermined function may be reasonably adjusted and changed by testing the heating condition of the cable drum during operation of the engineering equipment, technical reference materials, and safety design requirements of the cable drum.
In one embodiment of the present application, determining the fourth coefficient from the temperature increase value includes:
under the condition that the temperature rise value is larger than the temperature rise threshold value, determining a fourth coefficient according to the difference value between the temperature rise value and the temperature rise threshold value;
and determining the fourth coefficient as a second preset value under the condition that the temperature rise value is smaller than or equal to the temperature rise threshold value.
The temperature rise value of the reel cable in the preset time period represents the heat generated by the current reel cable, so that the larger the temperature rise value is, the higher the heat generated by the current reel cable is, and the maximum current carrying capacity of the cable reel is reduced.
After the processor acquires the temperature rise value, judging the magnitude relation between the temperature rise value and a preset temperature rise threshold value, and under the condition that the temperature rise value is larger than the temperature rise threshold value, determining a fourth coefficient by utilizing the difference value between the temperature rise value and the temperature rise threshold value, namely:
a 4 ＝n 4 -T (4)
wherein a is 4 And T is the temperature rise threshold value for the fourth coefficient.
If the temperature rise value is less than or equal to the temperature rise threshold, the fourth coefficient may be set directly to a second preset value, illustratively, 1.
After obtaining the first coefficient, the second coefficient, the third coefficient and the fourth coefficient, the processor can determine the current maximum value of the motor through a preset current maximum value calculation formula:
I max ＝a 1 a 2 a 3 I-a 4 I (5)
wherein a is 1 As a first coefficient, a 2 A is a second coefficient, a 3 A is a third coefficient, a 4 Is the fourth coefficient, I is the rated current-carrying capacity of the cable, I max Is the maximum value of the current.
The processor determines the maximum current value of the finished current, namely the maximum current-carrying capacity of the cable drum, and controls various working parameters of the motor by taking the maximum current value as a standard to ensure that the current of the motor does not exceed the maximum current value, so that various potential safety hazards caused by overheating of the cable drum are avoided.
In one embodiment of the present application, obtaining a current number of turns of the cable drum, a current ambient temperature, and a temperature increase value of the drum over a preset time includes:
acquiring the current winding drum number of turns through a winding drum encoder;
acquiring the current ambient temperature through a ring temperature sensor;
the temperature rise value is obtained by a drum temperature sensor.
The processor can acquire the current winding drum number of turns, the current environment temperature and the temperature rise value by the winding drum encoder, the ring temperature sensor and the winding drum temperature sensor respectively, determine a plurality of corresponding coefficients according to the parameters, and determine the maximum current carrying capacity of the cable, namely the current maximum value of the motor by utilizing the determined coefficients and the rated current carrying capacity of the cable.
By the motor current control method in the above embodiment, when the engineering equipment works by using the kinetic energy provided by the motor, the processor can acquire a plurality of parameters related to the maximum current-carrying capacity of the cable drum: the current winding drum number of turns, the current ambient temperature, the temperature rise value of the winding drum in a preset time period and the core number of the winding drum cable are determined accurately according to the parameters, the current of the motor is controlled not to exceed the current maximum value, overheating of the cable winding drum is avoided, safety in the operation process of engineering equipment is guaranteed, and the service life of the cable winding drum is prolonged.
Fig. 3 is a schematic structural diagram of a motor current control device according to an embodiment of the present application, as shown in fig. 3, in an embodiment of the present application, there is provided a motor current control device 1000 applied to engineering equipment, where a motor of the engineering equipment is connected to a power supply through a cable drum, and the device includes:
the current parameter obtaining module 1001 is configured to obtain a current winding drum number of turns of the cable winding drum, a current ambient temperature, and a temperature rise value of the winding drum in a preset time period;
a current maximum value determining module 1002, configured to determine a current maximum value of the motor according to a current winding drum number, a current ambient temperature, a temperature rise value, and a core number of the cable;
the current control module 1003 is configured to control a current of the motor not to exceed a current maximum value.
In one embodiment of the present application, the current control module 1002 includes:
the first coefficient determination submodule is used for determining a first coefficient according to the current winding drum number of turns;
a second coefficient determination sub-module for determining a second coefficient based on the number of cores;
a third coefficient determination submodule for determining a third coefficient according to the current ambient temperature;
a fourth coefficient determination sub-module for determining a fourth coefficient based on the temperature rise value;
and the current maximum value determining submodule is used for determining the current maximum value according to the first coefficient, the second coefficient, the third coefficient, the fourth coefficient and the rated current-carrying capacity of the cable.
In one embodiment of the present application, a first coefficient determination submodule includes:
the layer number determining unit is used for determining the layer number of the current winding drum cable according to the current winding drum number of turns;
the first coefficient determining unit is used for determining a first coefficient according to the number of layers of the current reel cable, the number of layers threshold and a first coefficient original value under the condition that the number of layers of the current reel cable is smaller than the number threshold;
and determining the first coefficient as a first preset value under the condition that the number of the layers of the current reel cable is larger than or equal to the threshold value of the number of the layers.
In one embodiment of the present application, the second coefficient determination submodule includes:
a second coefficient determining unit configured to determine a coefficient corresponding to the number of cores according to a first preset function, as a second coefficient, the first preset function including:
wherein a is 2 Is the second coefficient, n 2 Is the core number.
In one embodiment of the present application, the third coefficient determination submodule includes:
a third coefficient determining unit, configured to determine a coefficient corresponding to the current ambient temperature according to a second preset function, as the third coefficient, where the second preset function includes:
wherein a is 3 Is a third coefficient, n 3 Is the current ambient temperature.
In one embodiment of the present application, the fourth coefficient determination submodule includes:
a fourth coefficient determining unit, configured to determine a fourth coefficient according to a difference value between the temperature rise value and the temperature rise threshold value when the temperature rise value is greater than the temperature rise threshold value;
and determining the fourth coefficient as a second preset value under the condition that the temperature rise value is smaller than or equal to the temperature rise threshold value.
In one embodiment of the present application, the current parameter obtaining module 1001 includes:
the coil number acquisition unit is used for acquiring the current coil number of the coil through the coil encoder;
the ring temperature acquisition unit is used for acquiring the current environment temperature through the ring temperature sensor;
and the temperature rise acquisition unit is used for acquiring a temperature rise value through the winding drum temperature sensor.
The motor current control device 1000 provided in the embodiment of the present application can implement each process of step S100 to step S300 in the method embodiment, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted here.
In one embodiment of the present application, there is provided an engineering apparatus comprising:
the motor is connected with the power supply through a cable drum and used for controlling engineering equipment to operate;
and the processor is used for executing the motor current control method in the method embodiment.
The engineering equipment comprises a motor connected with a power supply through a cable drum, and the motor provides kinetic energy for the operation upper assembly of the engineering equipment. When the engineering equipment is in a non-running state and needs to operate, an operator can press the plug-in switch to switch the engineering equipment to an electric mode, namely a mode that a motor provides kinetic energy for operation uploading, and meanwhile, a processor executes the motor current control method in the embodiment, so that overheating of a cable drum is avoided, and operation safety is guaranteed.
In one embodiment of the present application, a machine-readable storage medium is provided, on which instructions are stored which, when executed by a processor, cause the processor to implement the motor current control method in the method embodiments described above.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by the computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that 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 an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (10)
1. A motor current control method, characterized by being applied to engineering equipment, a motor of which is connected to a power supply through a cable drum, the method comprising:
acquiring the current winding drum number of turns of the cable winding drum, the current ambient temperature and the temperature rise value of the winding drum in a preset time period;
determining a current maximum value of the motor according to the current winding drum number, the current environment temperature, the temperature rise value and the core number of the winding drum cable;
controlling the current of the motor not to exceed the current maximum.
2. The method of claim 1, wherein said determining the current maximum value of the motor based on the current number of turns of the spool, the current ambient temperature, the temperature rise value, and the core count of the spool cable comprises:
determining a first coefficient according to the current winding drum number;
determining a second coefficient based on the core count;
determining a third coefficient according to the current ambient temperature;
determining a fourth coefficient from the temperature rise value;
and determining the maximum value of the current according to the first coefficient, the second coefficient, the third coefficient, the fourth coefficient and the rated current-carrying capacity of the cable.
3. The method of claim 2, wherein said determining a first coefficient from said current number of windings comprises:
determining the number of layers of the cable of the current winding drum according to the number of turns of the current winding drum;
determining a first coefficient according to the number of the current cable layers of the reel, the number of the cable layers of the reel and a first coefficient original value under the condition that the number of the cable layers of the current reel is smaller than a layer number threshold;
and determining the first coefficient as a first preset value under the condition that the number of the current winding drum cable layers is larger than or equal to the layer number threshold value.
4. The method of claim 2, wherein said determining a second coefficient based on said core count comprises:
determining a coefficient corresponding to the core number according to a first preset function, wherein the first preset function comprises:
wherein a is 2 For the second coefficient, n 2 Is the core number.
5. The method of claim 2, wherein said determining a third coefficient from said current ambient temperature comprises:
determining a coefficient corresponding to the current ambient temperature according to a second preset function, wherein the second preset function comprises:
wherein a is 3 For the third coefficient, n 3 Is the current ambient temperature.
6. The method of claim 2, wherein said determining a fourth coefficient from said temperature rise value comprises:
determining the fourth coefficient according to the difference value between the temperature rise value and the temperature rise threshold value under the condition that the temperature rise value is larger than the temperature rise threshold value;
and determining the fourth coefficient as a second preset value under the condition that the temperature rise value is smaller than or equal to the temperature rise threshold value.
7. The method of claim 1, wherein the obtaining the current number of turns of the cable drum, the current ambient temperature, and the drum temperature rise value over a preset time comprises:
acquiring the current winding drum number of turns through a winding drum encoder;
acquiring the current ambient temperature through a ring temperature sensor;
the temperature rise value is obtained by a drum temperature sensor.
8. A motor current control device for use with an engineering apparatus, the motor of the engineering apparatus being connected to a power source by a cable drum, the device comprising:
the current parameter acquisition module is used for acquiring the current winding drum number of turns of the cable winding drum, the current environment temperature and the temperature rise value of the winding drum in a preset time period;
the current maximum value determining module is used for determining the current maximum value of the motor according to the current winding drum number, the current environment temperature, the temperature rise value and the core number of the cable;
and the current control module is used for controlling the current of the motor not to exceed the maximum current value.
9. An engineering apparatus, comprising:
the motor is connected with a power supply through a cable drum and used for controlling the engineering equipment to operate;
a processor for performing the motor current control method according to any one of claims 1-7.
10. A computer readable storage medium having instructions stored thereon, which when executed by a processor cause the processor to be configured to perform the motor current control method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310213228.8A CN116436373A (en) | 2023-03-07 | 2023-03-07 | Motor current control method and device and engineering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310213228.8A CN116436373A (en) | 2023-03-07 | 2023-03-07 | Motor current control method and device and engineering equipment |
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| Publication Number | Publication Date |
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| CN116436373A true CN116436373A (en) | 2023-07-14 |
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| CN202310213228.8A Pending CN116436373A (en) | 2023-03-07 | 2023-03-07 | Motor current control method and device and engineering equipment |
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| Country | Link |
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| CN (1) | CN116436373A (en) |
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