CN116488398A - Motor cooling control method and device and motor - Google Patents
Motor cooling control method and device and motor Download PDFInfo
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- CN116488398A CN116488398A CN202310408200.XA CN202310408200A CN116488398A CN 116488398 A CN116488398 A CN 116488398A CN 202310408200 A CN202310408200 A CN 202310408200A CN 116488398 A CN116488398 A CN 116488398A
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- 238000001816 cooling Methods 0.000 title claims abstract description 144
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000010586 diagram Methods 0.000 claims abstract description 50
- 230000008859 change Effects 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000004590 computer program Methods 0.000 description 8
- 230000036962 time dependent Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
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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
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
-
- 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
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
- H02P29/64—Controlling or determining the temperature of the winding
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Electric Motors In General (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to the technical field of cooling control, in particular to a motor cooling control method and device and a motor, wherein the method comprises the following steps: receiving a starting signal, and acquiring a first temperature of a coil; opening a cooling mode or a mode to be cooled according to the first temperature; generating a time moment temperature relation diagram according to the data of the previous work in a mode to be cooled; acquiring motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque; when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor; and monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor. According to the scheme provided by the invention, the cooling mode is determined by detecting the temperature of the coil, and the cooling control is performed by combining the data of the previous work under the mode to be cooled, so that the cooling can be controlled according to the current temperature, and the cooling energy consumption is reduced.
Description
Technical Field
The present invention relates to the field of cooling control technologies, and in particular, to a motor cooling control method and apparatus, and a motor.
Background
The stirrer is a common household appliance and is mainly used for crushing, stirring, mixing and the like in the food manufacturing process. The stirrer mainly comprises a motor, a transmission system and a stirring structure, wherein the motor provides power for the stirrer, the transmission system transmits power output by the motor to the stirring structure, and the stirring structure is provided with different shapes according to different requirements.
The initial resistance is big when the mixer works, and the calorific capacity is big, and in the stirring process, along with the broken mixture of food, the resistance of stirring is along with the decline, calorific capacity also declines. If the stirrer is used only for a short time, the stirrer does not need special cooling, however, in certain occasions, such as restaurant, the use frequency of the stirrer is very high, and because the use time is long or the interval time is short, the motor starts working next time when the motor is not cooled by heat dissipation, so that the motor is overheated, the winding is easy to blow, and the motor is damaged.
The prior art generally solves this problem by providing a cooling fan that rotates in synchronization with the motor to provide cooling to the motor. This design is based on the heat generation normalization, and can perform a cooling effect, but does not consider the problem when the motor needs to dissipate heat, resulting in a large energy loss.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a motor cooling control method, apparatus, and motor.
The embodiment of the invention is realized in such a way that a motor cooling control method comprises the following steps:
receiving a starting signal, and acquiring a first temperature of a coil;
opening a cooling mode or a mode to be cooled according to the first temperature;
in a waiting cooling mode, determining the duration of the previous downtime from the current starting time, if the determined duration is smaller than a set duration threshold value, acquiring the data of the previous work, and generating a time moment temperature relation diagram according to the data of the previous work;
acquiring motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor.
In one embodiment, the present invention provides a motor cooling control apparatus including:
the first temperature acquisition module is used for receiving the starting signal and acquiring the first temperature of the coil;
the cooling mode selection module is used for starting a cooling mode or a mode to be cooled according to the first temperature;
the module to be cooled is used for determining the duration of the last time of stopping time from the starting time in the mode to be cooled, if the determined duration is smaller than a set duration threshold value, acquiring the data of the last time of working, and generating a time moment temperature relation diagram according to the data of the last time of working;
the torque acquisition module is used for acquiring the motor torque and determining the cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
the fan blade driving module is used for reaching the cooling starting time, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and the second temperature monitoring module is used for monitoring the second temperature of the motor coil and adjusting the moment of the motor according to the change of the second temperature so as to stabilize the temperature of the motor.
In one embodiment, the present invention provides an electric machine comprising:
the motor comprises a motor body and a control module, wherein the motor body is provided with fan blades which are in transmission connection with a rotating shaft of the motor through an electromagnetic clutch; the control module is used for executing the motor cooling control method.
The motor cooling control method provided by the invention determines a cooling mode by acquiring the first temperature of a coil, wherein the cooling mode comprises an instant cooling mode and a waiting cooling mode, and in the waiting cooling mode, if the time of long-distance current starting of the previous stopping time meets a set condition, a time moment temperature relation diagram is generated according to the previous working data, the cooling time is determined by the generated time moment temperature relation diagram and the current moment of a motor, and an electromagnetic clutch is started to enable a fan blade to rotate along with the motor when the cooling time is reached; when the fan blades rotate along with the motor, the second temperature of the motor coil is monitored, so that the torque output of the motor is adjusted, and the temperature is prevented from being too high. According to the method provided by the invention, the time point for starting cooling is determined according to the first temperature and the moment of the motor coil, so that the long-time starting of cooling is avoided, and the energy consumption is reduced.
Drawings
FIG. 1 is a flow chart of a motor cooling control method provided by one embodiment;
FIG. 2 is a block diagram of a motor cooling control apparatus according to one embodiment;
FIG. 3 is a block diagram of an electric machine according to one embodiment;
FIG. 4 is a block diagram of the internal architecture of a control module in one embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another element. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of this disclosure.
As shown in fig. 1, in one embodiment, a motor cooling control method is provided, which specifically may include the following steps:
step S100, receiving a starting signal, and acquiring a first temperature of a coil;
step S200, starting a cooling mode or a mode to be cooled according to a first temperature;
step S300, in a mode to be cooled, determining the duration of the last time of downtime from the current starting time, if the determined duration is smaller than a set duration threshold value, acquiring the data of the last time of operation, and generating a time moment temperature relation diagram according to the data of the last time of operation;
step S400, obtaining motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
step S500, when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
step S600, monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor.
In this embodiment, the start signal may be a start signal of the motor, which may be obtained by detecting a current flowing through a coil of the motor or a rotational speed of the motor, and the start signal may be a start signal of a key switch of the agitator. The coil refers to a winding coil of a motor, and the prior art provides various technical means for measuring the temperature of the coil, including embedding a temperature sensor in the motor, and directly or indirectly obtaining the temperature of the coil by detecting the resistance change of the coil, which is common prior art, and the embodiments of the present invention are not repeated.
In the embodiment of the invention, an opening-cooling mode or a waiting-cooling mode is determined according to the collected first temperature, wherein in the cooling mode, the fan blades and the motor are started simultaneously to cool the motor in real time, and in the waiting-cooling mode, the fan blades are started later than the motor; the instant cooling mode and the to-be-cooled mode are set, so that the cooling can be controlled according to different temperature states of the motor, and the energy consumption caused by ineffective cooling is reduced.
In this embodiment, in the mode to be cooled, the time moment temperature relation diagram is generated according to the data of the previous work by acquiring the data of the previous work, and the cooling start time is determined according to the generated time moment temperature relation diagram, the first temperature and the current moment of the motor, so as to realize the forecast setting of the start of cooling. Compared with real-time acquisition, the method can predict the trend of the temperature, avoid the problem that the inertia is rushed up even if the temperature is cooled and started under the real-time detection condition, lead the cooled control window to be narrower and more accurate, and further reduce the problem of higher ineffective energy consumption caused by cooling under a wide window. It can be understood that, the control window herein refers to a temperature interval in which temperature cooling is started, when a real-time detection mode is adopted, in order to avoid temperature inertia overshoot, cooling needs to be started before the temperature is less than a set temperature threshold, and the temperature when cooling is started is larger than the set temperature threshold; the invention can obtain the approximate time reaching the set temperature value through the time moment temperature relation diagram, thereby reducing the window time for opening the cooling, leading the time for opening the cooling to be closer to the time for reaching the set temperature threshold value, and reducing the invalid cooling time.
In the embodiment of the invention, when the cooling start time is reached, the rotating speed of the motor is reduced, the torque output is increased, and the electromagnetic clutch is started at the same time, so that the motor rotates and simultaneously drives the fan blades to rotate, and the fan blades rotate to air-cool the motor coil, thereby preventing the motor from overheating. In the state where the cooling is on, the cooling control can be performed in real time by monitoring the second temperature of the motor, and it can be understood that the cooling can be stopped when the temperature is lowered to the set stop threshold.
The motor cooling control method provided by the invention determines a cooling mode by acquiring the first temperature of a coil, wherein the cooling mode comprises an instant cooling mode and a waiting cooling mode, and in the waiting cooling mode, if the time of long-distance current starting of the previous stopping time meets a set condition, a time moment temperature relation diagram is generated according to the previous working data, the cooling time is determined by the generated time moment temperature relation diagram and the current moment of a motor, and an electromagnetic clutch is started to enable a fan blade to rotate along with the motor when the cooling time is reached; when the fan blades rotate along with the motor, the second temperature of the motor coil is monitored, so that the torque output of the motor is adjusted, and the temperature is prevented from being too high. According to the method provided by the invention, the time point for starting cooling is determined according to the first temperature and the moment of the motor coil, so that the long-time starting of cooling is avoided, and the energy consumption is reduced.
As an optional embodiment of the present invention, the opening, i.e. the cooling mode or the mode to be cooled according to the first temperature includes:
comparing the first temperature with a set first temperature threshold value;
if the first temperature is lower than a set first temperature threshold value and the deviation is greater than a set deviation threshold value, starting a mode to be cooled, and starting a motor under the mode to be cooled firstly and then starting the fan blades;
if the first temperature is higher than the set first temperature threshold and the deviation is greater than the set deviation threshold, starting an instant cooling mode, and synchronously starting the motor and the fan blades in the instant cooling mode;
if the deviation between the first temperature and the set first temperature threshold is smaller than the set deviation threshold, the average working time length of the previous stirring process is obtained, if the average working time length of the previous stirring process is smaller than the working time length of the previous stirring process, the instant cooling mode is started, and otherwise, the waiting cooling mode is started.
In this embodiment, by the above setting, what cooling mode is turned on can be determined from the first temperature and the set first temperature threshold. In this embodiment, the deviation may be obtained from the ratio of the absolute value of the difference between the first temperature and the first temperature threshold to the first temperature threshold, and the set deviation threshold is typically 10% -15% of the first temperature threshold; the first temperature threshold here is the safe operating temperature of the motor.
In this embodiment, the duration of the previous operation is longer than the average duration of the previous operations, so that the heat productivity of the motor is higher, and the direct start, i.e. the cold mode, can be performed at this time. At this time, although the temperature of the motor does not reach the temperature condition of the cooling start, the first temperature threshold is easily and rapidly reached in the current working process because of the higher heat accumulated in the previous longer working time, so that the instant cooling mode is adopted.
As an optional embodiment of the present invention, the obtaining data of the previous work, generating a time moment temperature relation graph according to the data of the previous work, includes:
acquiring data of previous work, wherein the data of the previous work comprise a change relation of coil temperature along with time and a change relation of moment along with time;
the time is taken as an X axis, the moment is taken as a Y moment, a time moment relation diagram is obtained according to the time-to-time change relation of the moment, multi-line segment fitting is carried out on the time moment relation diagram, and a first curved surface vertical to an XY plane is obtained according to the fitting result;
obtaining a time-temperature relation diagram by taking time as an X axis and temperature as a Z moment according to the time-to-time change relation of the temperature, performing multi-line segment fitting on the time-to-temperature relation diagram, and obtaining a second curved surface vertical to an XZ plane according to a fitting result;
and obtaining a time moment temperature relation diagram by the intersection line of the first curved surface and the second curved surface.
In this embodiment, it should be noted that, in the graph of the time-dependent change of the coil temperature and the graph of the time-dependent change of the moment, discrete sampling is adopted, so that the two graphs are not continuous curves, but are formed by a plurality of discrete points, each point represents the corresponding relationship between the coil temperature and the time in the time-dependent change of the coil temperature, and each point represents the corresponding relationship between the motor moment and the time in the time-dependent change of the moment.
In this embodiment, during the fitting process, a target equation is establishedAnd (3) deriving to obtain:
the system of equations is obtained by arrangement:
solving to obtain:
wherein x is i 、y i The abscissa and ordinate of the ith point involved in fitting; a is the intercept of the target straight line, b is the slope of the target straight line; n is the number of points involved in the fit;the optimal solutions for a and b, respectively. From the above, a fitting straight line +.>Fitting straight lines +.>
In this embodiment, a multi-segment fitting is used, soA straight line fitted on the XY plane and the XZ plane is shown, respectively.
In this embodiment, the first curved surface is obtained by stretching a line segment obtained by sequentially connecting all the line segments obtained by fitting on the XY plane end to end, perpendicular to the XY plane; and the second curved surface is obtained by stretching a line segment obtained by sequentially connecting all the fitted line segments on the XZ plane end to end perpendicular to the XZ plane. And obtaining a relationship diagram of the time moment and the temperature by taking the intersection line of the first curved surface and the second curved surface.
In this embodiment, as a further preferable scheme, the latest several times of working data are obtained, and each time of working data can obtain one intersecting curve, then several intersecting curves can be obtained; when any two parameters of time, temperature and moment are used for predicting the other parameter (for example, the corresponding time is deduced by the temperature and moment), a plurality of values of the other parameter can be obtained, a range interval can be obtained by the plurality of values, and the intermediate value of the interval is taken as the estimated value.
As an optional embodiment of the present invention, the multi-line segment fitting is performed on the time moment relation diagram or the multi-line segment fitting is performed on the time temperature relation diagram, where the multi-line segment fitting specifically includes:
dividing the time range into a plurality of equal-length intervals;
performing line segment fitting on points in each interval;
and obtaining a multi-line segment fitting result by sequentially connecting the line segments obtained by fitting end to end.
In this embodiment, in the process of segment fitting, the time range is divided into a plurality of equal-length intervals, and the segment fitting can be performed on each interval, so that the fitting result is more accurate, and the deviation is reduced. The fitting is performed to obtain a straight line, and the line segment is intercepted through the corresponding time interval, so that the line segment can be obtained.
As an optional embodiment of the present invention, the performing line segment fitting on the points in each interval further includes:
judging whether the included angle of two adjacent line segments is larger than a set angle threshold value, if so, merging the corresponding sections of the two adjacent line segments into a section, and fitting the line segments again;
repeating the previous step until the included angle of any adjacent line segments is smaller than or equal to the set angle threshold.
In this embodiment, the angle threshold is more than 120 degrees, and may generally be between 120 degrees and 150 degrees, and if the included angle of the two line segments is within this range, the two line segments are smoother, and the sections corresponding to the two line segments may be considered to be combined and re-fitted; when the included angle of the two line segments is smaller, the trend of the two line segments is larger, and the two line segments are difficult to fit into a straight line.
As an optional embodiment of the present invention, the determining the cooling start time according to the generated time moment temperature relation diagram, the first temperature and the motor moment includes:
determining a temperature difference between the first temperature and a first temperature threshold;
determining a first temperature point corresponding to the motor torque on the time torque temperature relation diagram;
determining a second temperature point from the temperature difference and the first temperature point;
the cooling start time is determined by the time difference between the first temperature point and the second temperature point.
In this embodiment, in one working process, the point having the same torque size as the current motor torque is often not unique, but in this embodiment, the starting process of the motor is performed, so when the current motor torque corresponds to a plurality of temperature points having different sizes, the temperature of the temperature point having the smallest corresponding time is taken as the first temperature point. It is understood that the time on the time axis refers to the time when the motor is operated, and the zero point of the time axis corresponds to the starting time of the motor.
In this embodiment, when the previous data are acquired, a time difference is obtained from each intersection curve of each data, and the minimum value of all the obtained time differences is taken as the cooling start time.
As an alternative embodiment of the present invention, the adjusting the torque of the motor according to the second temperature to stabilize the motor temperature includes:
comparing the second temperature with the first temperature threshold;
and if the second temperature is greater than the first temperature threshold and the deviation is greater than the set deviation threshold, reducing the torque output of the motor according to the set variation percentage.
In this embodiment, for the explanation of the first temperature threshold and the set deviation threshold, reference is made to the foregoing embodiment, and this embodiment is not repeated.
The embodiment of the invention also provides a motor cooling control device, which comprises:
the first temperature acquisition module is used for receiving the starting signal and acquiring the first temperature of the coil;
the cooling mode selection module is used for starting a cooling mode or a mode to be cooled according to the first temperature;
the module to be cooled is used for determining the duration of the last time of stopping time from the starting time in the mode to be cooled, if the determined duration is smaller than a set duration threshold value, acquiring the data of the last time of working, and generating a time moment temperature relation diagram according to the data of the last time of working;
the torque acquisition module is used for acquiring the motor torque and determining the cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
the fan blade driving module is used for reaching the cooling starting time, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and the second temperature monitoring module is used for monitoring the second temperature of the motor coil and adjusting the moment of the motor according to the change of the second temperature so as to stabilize the temperature of the motor.
In this embodiment, each module is modularized in the method portion provided by the present invention, and for a specific explanation of each module, reference is made to the content of the method portion of the present invention, which is not described in detail in this embodiment.
The embodiment of the invention also provides a motor, which comprises:
the motor comprises a motor body and a control module, wherein the motor body is provided with fan blades which are in transmission connection with a rotating shaft of the motor through an electromagnetic clutch; the control module is used for executing the motor cooling control method according to the embodiment of the invention.
In this embodiment, as shown in fig. 3, the temperature sensor 1, the electromagnetic clutch 2, the turbine 3, and the fan blades 4 are disposed in the motor, and the temperature sensor 1 can detect the temperature of the coil 5. The electromagnetic clutch 2 is connected with the control module through a wire, the control module controls the action of the electromagnetic clutch by executing the motor cooling control method provided by the embodiment of the invention and controlling the action of the electromagnetic clutch by acquiring the detection value of the temperature sensor 1 and the motor torque (the real-time torque of the motor can be calculated by a torque sensor or through the relation of the motor rotation speed, power and torque).
In this embodiment, the control module may be a controller built in the motor, or may be a control device disposed in the mixer and connected to the motor, where the control device controls the cooling process of the motor by executing the programmed motor cooling control method according to the present invention.
The motor provided by the invention determines a cooling mode by acquiring the first temperature of a coil, wherein the cooling mode comprises an instant cooling mode and a waiting cooling mode, and in the waiting cooling mode, if the time of starting the motor for a long distance at the previous time in the waiting cooling mode meets a set condition, a time moment temperature relation diagram is generated according to the previous working data, the cooling time is determined by the generated time moment temperature relation diagram and the current moment of the motor, and an electromagnetic clutch is started to enable a fan blade to rotate along with the motor when the cooling time is reached; when the fan blades rotate along with the motor, the second temperature of the motor coil is monitored, so that the torque output of the motor is adjusted, and the temperature is prevented from being too high. According to the motor provided by the invention, the time point for starting cooling is determined according to the first temperature and the moment of the motor coil, so that the long-time starting of cooling is avoided, and the energy consumption is reduced.
FIG. 4 illustrates an internal block diagram of a control module in one embodiment. As shown in fig. 4, the control module includes a processor, a memory, a network interface, an input device, and a display screen connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the control module stores an operating system and may also store a computer program, which when executed by a processor, causes the processor to implement the motor cooling control method provided by the embodiment of the invention. The internal memory may also store a computer program, which when executed by the processor, causes the processor to execute the motor cooling control method provided by the embodiment of the invention. The display screen of the control module can be a liquid crystal display screen or an electronic ink display screen, the input device of the control module can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the control module, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 4 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the control module to which the present inventive arrangements are applied, and that a particular control module may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the motor cooling control device provided in the embodiment of the present invention may be implemented in the form of a computer program, which may run on a control module as shown in fig. 4. The memory of the control module may store various program modules constituting the motor cooling control device, such as the first temperature acquisition module, the cooling mode selection module, the module to be cooled, the torque acquisition module, the fan blade driving module, and the second temperature monitoring module shown in fig. 2. The computer program constituted by the respective program modules causes the processor to execute the steps in the motor cooling control method of the respective embodiments of the present invention described in the present specification.
For example, the control module shown in fig. 4 may perform step S100 by the first temperature acquisition module in the motor cooling control apparatus shown in fig. 2; the control module may execute step S200 through the cooling mode selection module; the control module can execute the step S300 through the module to be cooled; the control module may execute step S400 through the torque obtaining module; the control module can execute the step S500 through the fan blade driving module; the control module may execute step S600 through the second temperature monitoring module.
In one embodiment, a control module is provided, the control module including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
receiving a starting signal, and acquiring a first temperature of a coil;
opening a cooling mode or a mode to be cooled according to the first temperature;
in a waiting cooling mode, determining the duration of the previous downtime from the current starting time, if the determined duration is smaller than a set duration threshold value, acquiring the data of the previous work, and generating a time moment temperature relation diagram according to the data of the previous work;
acquiring motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which when executed by a processor causes the processor to perform the steps of:
receiving a starting signal, and acquiring a first temperature of a coil;
opening a cooling mode or a mode to be cooled according to the first temperature;
in a waiting cooling mode, determining the duration of the previous downtime from the current starting time, if the determined duration is smaller than a set duration threshold value, acquiring the data of the previous work, and generating a time moment temperature relation diagram according to the data of the previous work;
acquiring motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A motor cooling control method, characterized by comprising:
receiving a starting signal, and acquiring a first temperature of a coil;
opening a cooling mode or a mode to be cooled according to the first temperature;
in a waiting cooling mode, determining the duration of the previous downtime from the current starting time, if the determined duration is smaller than a set duration threshold value, acquiring the data of the previous work, and generating a time moment temperature relation diagram according to the data of the previous work;
acquiring motor torque to obtain motor torque, and determining cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
when the cooling start time is reached, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and monitoring a second temperature of the motor coil, and adjusting the moment of the motor according to the change of the second temperature to stabilize the temperature of the motor.
2. The motor cooling control method according to claim 1, wherein the on-demand or off-demand mode according to the first temperature includes:
comparing the first temperature with a set first temperature threshold value;
if the first temperature is lower than a set first temperature threshold value and the deviation is greater than a set deviation threshold value, starting a mode to be cooled, and starting a motor under the mode to be cooled firstly and then starting the fan blades;
if the first temperature is higher than the set first temperature threshold and the deviation is greater than the set deviation threshold, starting an instant cooling mode, and synchronously starting the motor and the fan blades in the instant cooling mode;
if the deviation between the first temperature and the set first temperature threshold is smaller than the set deviation threshold, the average working time length of the previous stirring process is obtained, if the average working time length of the previous stirring process is smaller than the working time length of the previous stirring process, the instant cooling mode is started, and otherwise, the waiting cooling mode is started.
3. The motor cooling control method according to claim 1, wherein the acquiring data of the previous work, generating a time moment temperature relation map from the data of the previous work, includes:
acquiring data of previous work, wherein the data of the previous work comprise a change relation of coil temperature along with time and a change relation of moment along with time;
the time is taken as an X axis, the moment is taken as a Y moment, a time moment relation diagram is obtained according to the time-to-time change relation of the moment, multi-line segment fitting is carried out on the time moment relation diagram, and a first curved surface vertical to an XY plane is obtained according to the fitting result;
obtaining a time-temperature relation diagram by taking time as an X axis and temperature as a Z moment according to the time-to-time change relation of the temperature, performing multi-line segment fitting on the time-to-temperature relation diagram, and obtaining a second curved surface vertical to an XZ plane according to a fitting result;
and obtaining a time moment temperature relation diagram by the intersection line of the first curved surface and the second curved surface.
4. The motor cooling control method according to claim 3, wherein the multi-line segment fitting is performed on the time moment relation diagram or the multi-line segment fitting is performed on the time temperature relation diagram, wherein the multi-line segment fitting specifically includes:
dividing the time range into a plurality of equal-length intervals;
performing line segment fitting on points in each interval;
and obtaining a multi-line segment fitting result by sequentially connecting the line segments obtained by fitting end to end.
5. The motor cooling control method according to claim 4, wherein the fitting of line segments to points in each section further comprises:
judging whether the included angle of two adjacent line segments is larger than a set angle threshold value, if so, merging the corresponding sections of the two adjacent line segments into a section, and fitting the line segments again;
repeating the previous step until the included angle of any adjacent line segments is smaller than or equal to the set angle threshold.
6. The motor cooling control method according to claim 1, wherein the determining the cooling start time based on the generated time torque temperature map, the first temperature, and the motor torque includes:
determining a temperature difference between the first temperature and a first temperature threshold;
determining a first temperature point corresponding to the motor torque on the time torque temperature relation diagram;
determining a second temperature point from the temperature difference and the first temperature point;
the cooling start time is determined by the time difference between the first temperature point and the second temperature point.
7. The motor cooling control method according to claim 1, wherein the adjusting the torque of the motor in accordance with the change in the second temperature stabilizes the motor temperature, comprising:
comparing the second temperature with the first temperature threshold;
and if the second temperature is greater than the first temperature threshold and the deviation is greater than the set deviation threshold, reducing the torque output of the motor according to the set variation percentage.
8. A motor cooling control device, characterized by comprising:
the first temperature acquisition module is used for receiving the starting signal and acquiring the first temperature of the coil;
the cooling mode selection module is used for starting a cooling mode or a mode to be cooled according to the first temperature;
the module to be cooled is used for determining the duration of the last time of stopping time from the starting time in the mode to be cooled, if the determined duration is smaller than a set duration threshold value, acquiring the data of the last time of working, and generating a time moment temperature relation diagram according to the data of the last time of working;
the torque acquisition module is used for acquiring the motor torque and determining the cooling start time according to the generated time torque temperature relation diagram, the first temperature and the motor torque;
the fan blade driving module is used for reaching the cooling starting time, adjusting the torque output of the motor and simultaneously starting the electromagnetic clutch to enable the fan blades to rotate along with the motor;
and the second temperature monitoring module is used for monitoring the second temperature of the motor coil and adjusting the moment of the motor according to the change of the second temperature so as to stabilize the temperature of the motor.
9. An electric machine, the electric machine comprising:
the motor comprises a motor body and a control module, wherein the motor body is provided with fan blades which are in transmission connection with a rotating shaft of the motor through an electromagnetic clutch; the control module is configured to execute the motor cooling control method according to any one of claims 1 to 7.
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| CN117498736A (en) * | 2024-01-03 | 2024-02-02 | 深圳市恒永达科技股份有限公司 | Heat dissipation method, system and medium for stepping motor |
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