DC motor based on temperature warning feedback

Abstract

The present invention relates to the field of DC motors, and is used to solve the problems that the control logic for motor temperature warning is too simple and there are easy data deviations in the temperature acquisition of the motor body. Specifically, it is a DC motor based on temperature warning feedback, including a DC motor and a DC motor temperature warning feedback system. The DC motor includes a heat dissipation base, an air inlet, and a coaxial fan. The temperature warning feedback system includes a temperature monitoring unit, a heat dissipation monitoring unit, a warning reminder unit, and a feedback analysis unit. In the present invention, by separately detecting the body temperature, ambient temperature, and heat dissipation temperature of the DC motor, a temperature data combination during motor operation is obtained, and based on the analysis of the temperature data combination during motor operation, judgments are made from the body temperature, heat dissipation temperature, and ambient temperature of the motor. It can not only generate a high-temperature warning for the motor, but also analyze based on the heat dissipation temperature, improving the detection ability for hidden heating fault phenomena of the motor.

Description

Technical Field

[0001] The present invention relates to the field of DC motors, specifically a DC motor based on temperature warning feedback. Background Art

[0002] The driver of a DC motor mainly includes a control chip, power devices, and a communication interface, etc. When the motor runs at high speed or the ambient temperature is abnormal, it is easy to cause the power devices to burn out due to overheating. To solve the above problems, in a DC motor system, a temperature control device is mostly configured. The existing temperature control device includes a temperature detection module and a motor start / stop control module. When the temperature detection module detects that the temperature of the power device is lower than the protection temperature, the motor start / stop control module controls the motor to work; when the temperature detection module detects that the temperature of the power device is higher than the protection temperature, the motor start / stop control module controls the motor to stop working. In this way, the problem of the power device burning out due to overheating is solved;

[0003] Currently, there are still deficiencies in the DC motor temperature warning feedback system in the prior art. When the existing DC motor temperature warning system is in use, most of them directly detect the temperature of the motor, and apply a simple direct judgment logic to the detected temperature to output the judgment result, that is, if the temperature exceeds the limit, the operation stops, and if the temperature does not exceed the limit, the operation continues. In actual use, it cannot adapt to the complex application environment of the motor, and at the same time, directly collecting the motor temperature will cause deviations in the basic temperature data used for logical judgment, resulting in hidden faults that cannot be discovered;

[0004] In view of the above technical problems, the present application proposes a solution. Summary of the Invention

[0005] In the present invention, by separately detecting the body temperature, ambient temperature, and heat dissipation temperature of the DC motor, a temperature data combination during motor operation is obtained, and based on the analysis of the temperature data combination during motor operation, judgments are made from the body temperature, heat dissipation temperature, and ambient temperature of the motor. It can not only generate a high-temperature warning for the motor, but also analyze based on the heat dissipation temperature, improving the detection ability of hidden heat generation faults of the motor, avoiding abnormal energy consumption phenomena of the motor, and solving the problems that the control logic of motor temperature warning is too simple and the data deviation is likely to occur in the collection of the motor body temperature, and a DC motor based on temperature warning feedback is proposed.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A DC motor based on temperature warning feedback includes a motor housing. An air inlet is provided on the outer wall of the motor housing. An output shaft penetrates through one side of the motor housing. The output shaft is connected to the rotor inside the motor housing. A heat dissipation base is fixedly installed at one end of the motor housing away from the output shaft. A coaxial fan is rotatably connected inside the heat dissipation base. The coaxial fan is coaxially connected to the output shaft and penetrates through the motor housing. A ventilation window is provided at one end of the motor housing close to the heat dissipation base. A heat dissipation window is provided on the outer side of the heat dissipation base. Among them, the heat dissipation window, the ventilation window, and the air inlet can form a complete air flow channel. The air inlet on the motor housing intakes air to balance the air pressure inside the motor housing;

[0008] A controller is fixedly installed outside the motor housing. A DC motor temperature warning feedback system is provided inside the controller. The controller is connected to the temperature sensor on the motor housing, obtains the data of the temperature sensor, and sends it to the DC motor temperature warning feedback system.

[0009] As a preferred embodiment of the present invention, the DC motor temperature warning feedback system includes a temperature monitoring unit, a heat dissipation monitoring unit, a warning reminder unit, and a feedback analysis unit. The temperature monitoring unit is used to monitor the multi-point temperatures in the DC motor to obtain temperature analysis data, and calculate the temperature average data according to the temperature analysis data;

[0010] The heat dissipation monitoring unit obtains the temperature average data through the temperature monitoring unit, conducts a combined analysis on the temperature average data, and generates a heat dissipation insufficient signal, a temperature exceeding standard signal, a heat generation excessive signal, and a rapid temperature rise signal according to the combined analysis result;

[0011] The warning reminder unit obtains the temperature analysis data through the temperature monitoring unit, conducts a threshold analysis on the temperature analysis data to generate an over-temperature signal. At the same time, the warning reminder unit obtains the heat dissipation insufficient signal, the temperature exceeding standard signal, the heat generation excessive signal, and the rapid temperature rise signal through the heat dissipation monitoring unit, and generates different levels of warning reminders according to different signals;

[0012] The feedback analysis unit obtains the temperature analysis data through the temperature detection unit, conducts a quantitative analysis on the temperature analysis data to obtain a ratio sequence, and conducts a linear analysis on the ratio sequence to obtain a temperature interference signal and an interference temperature.

[0013] As a preferred embodiment of the present invention, the points where the temperature monitoring unit monitors the temperature in the DC motor include the internal temperature of the motor housing, the intake air temperature at the air inlet, and the exhaust air temperature at the heat dissipation window. The temperature monitoring unit records the internal temperature of the motor housing as the working temperature T1, the intake air temperature at the air inlet as the ambient temperature T2, and the exhaust air temperature at the heat dissipation window as the heat dissipation temperature T3. The temperature monitoring unit collects the working temperature, ambient temperature, and heat dissipation temperature at the same moment and stores them as a set of temperature analysis data. During the operation of the DC motor, the temperature monitoring unit detects the temperature multiple times to obtain multiple sets of temperature analysis data;

[0014] The temperature monitoring unit performs arithmetic averaging on multiple sets of temperature analysis data to obtain the average working temperature t1, the average ambient temperature t2, and the average heat dissipation temperature t3. The temperature monitoring unit sends the average working temperature t1, the average ambient temperature t2, and the average heat dissipation temperature t3 to the heat dissipation analysis unit.

[0015] As a preferred embodiment of the present invention, the process of the heat dissipation analysis unit performing combined analysis on the temperature average data is as follows:

[0016] The heat dissipation analysis unit sums the average working temperature t1 and the average heat dissipation temperature t3 to obtain the total motor temperature t, and compares the total motor temperature t with a preset total temperature threshold. If the total motor temperature t is less than the preset total temperature threshold, no response is made. If the total motor temperature t is greater than or equal to the preset total temperature threshold, the average working temperature t1 and the average heat dissipation temperature t3 are respectively compared with the corresponding working temperature threshold and heat dissipation temperature threshold;

[0017] If only the average working temperature t1 is greater than the working temperature threshold, a heat dissipation insufficient signal is generated;

[0018] If only the average heat dissipation temperature t3 is greater than the heat dissipation temperature threshold, a heat generation excessive signal is generated;

[0019] If the average working temperature t1 is greater than the working temperature threshold and the average heat dissipation temperature t3 is greater than the heat dissipation temperature threshold, a rapid temperature rise signal is generated.

[0020] As a preferred embodiment of the present invention, the method for the heat dissipation analysis unit to generate a temperature exceeding standard signal is as follows:

[0021] The heat dissipation analysis unit calculates the ratio of the average working temperature t1 and the average ambient temperature t2 to obtain the operating temperature ratio T. The heat dissipation analysis unit compares the operating temperature ratio T with a preset ratio threshold. If the operating temperature ratio is greater than the preset ratio threshold, a temperature exceeding standard signal is generated. If the operating temperature ratio is less than or equal to the preset ratio threshold, a temperature normal signal is generated.

[0022] As a preferred embodiment of the present invention, the warning and reminder unit obtains the working temperature T1 through temperature monitoring, compares the working temperature T1 with a preset working temperature threshold. If the working temperature T1 is greater than the preset working temperature threshold, an over-temperature signal is generated. If the working temperature T1 is less than or equal to the preset working temperature threshold, no reaction is made;

[0023] After the warning and reminder unit obtains the insufficient heat dissipation signal and the temperature exceeding standard signal through the heat dissipation analysis unit, a low-risk alarm for the motor is generated. After the warning and reminder unit obtains the excessive heat generation signal and the rapid temperature rise signal through the heat dissipation analysis unit, a high-risk alarm for the motor is generated.

[0024] As a preferred embodiment of the present invention, the method for the feedback analysis unit to obtain the ratio sequence is as follows:

[0025] The feedback analysis unit obtains multiple groups of temperature analysis data through the temperature monitoring unit, extracts the ambient temperature T2 and the working temperature T1 in the temperature analysis data, calculates the ratio of the working temperature T1 to the ambient temperature T2 in the same group of temperature analysis data to obtain the temperature ratio. The feedback analysis unit performs ratio calculation on each group of temperature analysis data and records it as the temperature ratio i, where i = 1, 2, 3…, n. The feedback analysis unit sorts all the ambient temperatures T2 in ascending order and correspondingly sorts the temperature ratio i with the ambient temperature T2 to obtain the ratio sequence;

[0026] The method for the feedback analysis unit to obtain the temperature interference signal and the interference temperature is as follows:

[0027] The feedback analysis unit compares the i-th and (i + y)-th temperature ratios in the ratio sequence, where y is a non-zero natural number. If, after the x-th temperature ratio, the (i + y)-th temperature ratio is always greater than the i-th temperature ratio, the ambient temperature T2 corresponding to the x-th temperature ratio is recorded as the interference temperature, and a temperature interference signal is generated, indicating that after the x-th ambient temperature T2, the ambient temperature has caused obvious interference to the working temperature T1 of the DC motor. If there is no situation where the (i + y)-th temperature ratio is always greater than the i-th temperature ratio in the ratio sequence, no reaction is made.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. In the present invention, when monitoring the temperature of a DC motor, the body temperature, ambient temperature, and heat dissipation temperature of the DC motor are separately detected to obtain a temperature data combination during motor operation. By analyzing the temperature data combination during motor operation and making judgments based on the body temperature, heat dissipation temperature, and ambient temperature of the motor, not only can a high-temperature warning for the motor be generated to avoid aging failures caused by high-temperature operation of the motor, but also analysis can be performed based on the heat dissipation temperature to detect abnormal heat generation of the motor that is suppressed by the heat dissipation structure and cannot be directly detected when the motor is at a high temperature, improving the detection ability for concealed heat generation failures of the motor and avoiding abnormal energy consumption of the motor.

[0030] 2. In the present invention, when detecting the temperature of a DC motor, the ratio change between the ambient temperature and the motor operating temperature is statistically analyzed, and sequence analysis is performed based on the ratio change to obtain the ambient temperature that can significantly interfere with the operating temperature of the motor, helping managers to reasonably control the operating environment of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 is the front view structural schematic diagram of the present invention;

[0033] Figure 2 is the sectional view structural schematic diagram of the present invention;

[0034] Figure 3 is the system block diagram of the present invention;

[0035] Figure 4 is the system flowchart of the present invention.

[0036] In the figure: 1. Motor housing; 2. Heat dissipation seat; 3. Controller; 4. Output shaft; 5. Air inlet; 6. Base; 7. Heat dissipation window; 8. Ventilation window; 9. Coaxial fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1:

[0039] Please refer to Figure 1 - Figure 4As shown in the figure, the DC motor based on temperature warning feedback includes a motor housing 1. An air inlet 5 is provided on the outer wall of the motor housing 1. An output shaft 4 penetrates through one side of the motor housing 1. The output shaft 4 is connected to the rotor inside the motor housing 1. A heat dissipation seat 2 is fixedly installed at one end of the motor housing 1 away from the output shaft 4. A coaxial fan 9 is rotatably connected inside the heat dissipation seat 2. The coaxial fan 9 is coaxially connected to the output shaft 4 and penetrates through the motor housing 1. An air permeable window 8 is provided at one end of the motor housing 1 close to the heat dissipation seat 2. A heat dissipation window 7 is provided on the outer side of the heat dissipation seat 2. Among them, the heat dissipation window 7, the air permeable window 8 and the air inlet 5 can form a complete air flow channel. The coaxial fan 9 rotates driven by the motor output shaft 4 to provide suction, so that the hot air inside the motor housing 1 flows out through the air permeable window 8 and is discharged to the outside of the motor housing 1 through the heat dissipation window 7. The air inlet 5 on the motor housing 1 intakes air to balance the air pressure inside the motor housing 1;

[0040] A controller 3 is fixedly installed outside the motor housing 1. A DC motor temperature warning feedback system is arranged inside the controller 3. The controller 3 is connected to the temperature sensor on the motor housing 1 to obtain the data of the temperature sensor and send it to the DC motor temperature warning feedback system.

[0041] Embodiment 2:

[0042] Please refer to Figure 1 - Figure 4 As shown in the figure, the DC motor based on temperature warning feedback includes a DC motor temperature warning feedback system. The DC motor temperature warning feedback system includes a temperature monitoring unit, a heat dissipation monitoring unit, a warning reminder unit and a feedback analysis unit;

[0043] The temperature monitoring unit is used to detect the temperature in the DC motor and obtain the temperatures at multiple points in the DC motor. The points for obtaining the temperature include the temperature inside the motor housing 1, the intake air temperature of the air inlet 5 and the exhaust air temperature of the heat dissipation window 7. The temperature monitoring unit records the internal temperature of the motor housing 1 as the working temperature T1, records the intake air temperature of the air inlet 5 as the ambient temperature T2, and records the exhaust air temperature of the heat dissipation window 7 as the heat dissipation temperature T3. The temperature monitoring unit collects the working temperature, the ambient temperature and the heat dissipation temperature at the same moment and stores them as a set of temperature analysis data. The temperature monitoring unit detects the temperature multiple times during the operation of the DC motor to obtain multiple sets of temperature analysis data;

[0044] The warning reminder unit obtains the working temperature T1 through temperature monitoring and compares the working temperature T1 with a preset working temperature threshold. If the working temperature T1 is greater than the preset working temperature threshold, an over-temperature signal is generated. If the working temperature T1 is less than or equal to the preset working temperature threshold, no response is made;

[0045] The temperature monitoring unit performs arithmetic averaging on multiple groups of temperature analysis data to obtain the average working temperature t1, the average ambient temperature t2, and the average heat dissipation temperature t3. The temperature monitoring unit sends the average working temperature t1, the average ambient temperature t2, and the average heat dissipation temperature t3 to the heat dissipation analysis unit;

[0046] The heat dissipation analysis unit sums the average working temperature t1 and the average heat dissipation temperature t3 to obtain the total motor temperature t, and compares the total motor temperature t with a preset total temperature threshold. If the total motor temperature t is less than the preset total temperature threshold, no response is made. If the total motor temperature t is greater than or equal to the preset total temperature threshold, the average working temperature t1 and the average heat dissipation temperature t3 are respectively compared with the corresponding working temperature threshold and heat dissipation temperature threshold. If only the average working temperature t1 is greater than the working temperature threshold, indicating that the working temperature of the motor exceeds the standard but the heat dissipation temperature does not exceed the standard significantly, it means that the heat dissipation system cannot cool the high temperature inside the motor, and a heat dissipation insufficient signal is generated. If only the average heat dissipation temperature t3 is greater than the heat dissipation temperature threshold, indicating that the temperature inside the motor does not exceed the standard but the heat dissipation temperature exceeds the standard significantly, it means that the heat dissipation structure extracts the high temperature air inside the motor, keeping the temperature inside the motor below the standard. However, since the temperature of the gas discharged by the heat dissipation structure exceeds the standard, the actual heat generation of the motor still exceeds the standard requirement, and an overheating signal is generated. If the average working temperature t1 is greater than the working temperature threshold and the average heat dissipation temperature t3 is greater than the heat dissipation temperature threshold, indicating that the temperature inside the motor is still high under the condition that the heat dissipation temperature exceeds the standard, it means that the heat generation speed inside the motor is too fast, exceeding the heat dissipation capacity of the heat dissipation structure, and a rapid temperature rise signal is generated;

[0047] The heat dissipation analysis unit calculates the ratio of the average working temperature t1 and the average ambient temperature t2, and through the formula obtains the operating temperature ratio T, where q is a preset weight coefficient, and the value range of q is 0.5 to 0.9. The heat dissipation analysis unit compares the operating temperature ratio T with a preset ratio threshold. If the operating temperature ratio is greater than the preset ratio threshold, a temperature exceeding standard signal is generated. If the operating temperature ratio is less than or equal to the preset ratio threshold, a temperature normal signal is generated;

[0048] After obtaining the heat dissipation insufficient signal and the temperature exceeding standard signal through the heat dissipation analysis unit, the warning reminder unit generates a low-risk alarm for the motor. After obtaining the overheating signal and the rapid temperature rise signal through the heat dissipation analysis unit, the warning reminder unit generates a high-risk alarm for the motor, and generates corresponding sound and light alarms according to the low-risk alarm and the high-risk alarm for the motor to remind the management personnel;

[0049] The feedback analysis unit obtains multiple sets of temperature analysis data through the temperature monitoring unit, extracts the ambient temperature T2 and the working temperature T1 from the temperature analysis data, calculates the ratio of the working temperature T1 to the ambient temperature T2 in the same set of temperature analysis data to obtain a temperature ratio. The feedback analysis unit calculates the ratio for each set of temperature analysis data and records it as temperature ratio i, where i = 1, 2, 3…, n. The feedback analysis unit sorts all the ambient temperatures T2 in ascending order and correspondingly sorts the temperature ratio i with the ambient temperature T2 to obtain a ratio sequence. The feedback analysis unit compares the temperature ratio of the i-th group and the (i + y)-th group in the ratio sequence, where y is a natural number not equal to 0. If, after the temperature ratio of the x-th group, the temperature ratio of the (i + y)-th group is always greater than the temperature ratio of the i-th group, then the ambient temperature T2 corresponding to the temperature ratio of the x-th group is recorded as the interference temperature, and a temperature interference signal is generated, indicating that after the ambient temperature T2 of the x-th group, the ambient temperature has caused obvious interference to the working temperature T1 of the DC motor. If there is no situation where the temperature ratio of the (i + y)-th group is always greater than the temperature ratio of the i-th group in the ratio sequence, no reaction is made.

[0050] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A DC motor based on temperature warning feedback, characterized in that: The motor housing (1) comprises a motor housing (1), wherein an air inlet (5) is provided on the outer wall of the motor housing (1), an output shaft (4) passes through one side of the motor housing (1), the output shaft (4) is connected to a rotor inside the motor housing (1), a heat sink (2) is fixedly mounted on one end of the motor housing (1) away from the output shaft (4), a coaxial fan (9) is rotatably connected inside the heat sink (2), the coaxial fan (9) is coaxially connected to the output shaft (4) and passes through the motor housing (1), an air vent (8) is provided on one end of the motor housing (1) close to the heat sink (2), a heat dissipation window (7) is provided on the outer side of the heat sink (2), wherein the heat dissipation window (7), the air vent (8) and the air inlet (5) can form a complete air flow channel, and the air inlet (5) on the motor housing (1) balances the air pressure inside the motor housing (1); A controller (3) is fixedly mounted on the outside of the motor housing (1), a DC motor temperature early warning feedback system is arranged inside the controller (3), and the controller (3) is connected to a temperature sensor on the motor housing (1), obtains data from the temperature sensor and sends it to the DC motor temperature early warning feedback system; The DC motor temperature early warning feedback system comprises a temperature monitoring unit, a heat dissipation monitoring unit, an early warning reminder unit, and a feedback analysis unit. The temperature monitoring unit is used to monitor the temperature of multiple points in the DC motor to obtain temperature analysis data, and calculate the temperature average data according to the temperature analysis data; The heat dissipation monitoring unit obtains the average temperature data through the temperature monitoring unit, and performs combined analysis on the average temperature data, and generates a heat dissipation shortage signal, a temperature exceeding standard signal, a heat generation excess signal and a rapid temperature rise signal according to the combined analysis result; The early warning unit obtains temperature analysis data through the temperature monitoring unit, performs threshold analysis on the temperature analysis data, and generates an over-temperature signal. At the same time, the early warning unit obtains insufficient heat dissipation signals, excessive temperature signals, excessive heating signals, and rapid temperature rise signals through the heat dissipation monitoring unit, and generates early warnings of different levels according to different signals; The feedback analysis unit obtains temperature analysis data through the temperature detection unit, performs quantitative analysis on the temperature analysis data to obtain a ratio sequence, and performs linear analysis on the ratio sequence to obtain a temperature interference signal and an interference temperature; The points at which the temperature monitoring unit monitors the temperature in the DC motor include the internal temperature of the motor housing (1), the air intake temperature of the air intake port (5) and the exhaust temperature of the heat dissipation window (7). The temperature monitoring unit records the internal temperature of the motor housing (1) as the working temperature T1, the air intake temperature of the air intake port (5) as the ambient temperature T2, and the exhaust temperature of the heat dissipation window (7) as the heat dissipation temperature T3. The temperature monitoring unit collects the working temperature, the ambient temperature and the heat dissipation temperature at the same time and stores them as a set of temperature analysis data. The temperature monitoring unit detects the temperature multiple times during the operation of the DC motor to obtain multiple sets of temperature analysis data. The temperature monitoring unit performs arithmetic averaging on the multiple groups of temperature analysis data to obtain the working temperature mean t1, the ambient temperature mean t2 and the heat dissipation temperature mean t3, and the temperature monitoring unit sends the working temperature mean t1, the ambient temperature mean t2 and the heat dissipation temperature mean t3 to the heat dissipation analysis unit; The method for the feedback analysis unit to obtain the ratio sequence is: The feedback analysis unit obtains multiple groups of temperature analysis data through the temperature monitoring unit, extracts the ambient temperature T2 and the working temperature T1 in the temperature analysis data, calculates the ratio of the working temperature T1 to the ambient temperature T2 in the same group of temperature analysis data, and obtains the temperature ratio. The feedback analysis unit calculates the ratio for each group of temperature analysis data and records it as a temperature ratio i, i=1, 2, 3..., n. The feedback analysis unit sorts all the ambient temperatures T2 in order from small to large, and sorts the temperature ratio i and the ambient temperature T2 accordingly to obtain a ratio sequence. The method for the feedback analysis unit to obtain the temperature interference signal and the interference temperature is: The feedback analysis unit compares the temperature ratios of the i-th group and the i+y-th group in the comparison value sequence, wherein y is a natural number not equal to 0. If, after the temperature ratio of the x-th group, the temperature ratio of the i+y-th group is always greater than the temperature ratio of the i-th group, then the ambient temperature T2 corresponding to the temperature ratio of the x-th group is recorded as the interference temperature, and a temperature interference signal is generated, indicating that after the ambient temperature T2 of the x-th group, the ambient temperature has caused obvious interference to the operating temperature T1 of the DC motor. If, in the ratio sequence, there is no situation in which the temperature ratio of the i+y-th group is always greater than the temperature ratio of the i-th group, no response is made.

2. The DC motor based on temperature early warning feedback according to claim 1 is characterized in that: The process of the heat dissipation analysis unit combining and analyzing the average temperature data is as follows: The heat dissipation analysis unit sums the working temperature mean t1 and the heat dissipation temperature mean t3 to obtain the total temperature t of the motor, and compares the total temperature t of the motor with a preset total temperature threshold. If the total temperature t of the motor is less than the preset total temperature threshold, no response is made. If the total temperature t of the motor is greater than or equal to the preset total temperature threshold, the working temperature mean t1 and the heat dissipation temperature mean t3 are compared with the corresponding working temperature threshold and heat dissipation temperature threshold respectively. If only the operating temperature mean t1 is greater than the operating temperature threshold, an insufficient heat dissipation signal is generated; If only the heat dissipation temperature average t3 is greater than the heat dissipation temperature threshold, an excessive heat signal is generated; If the working temperature average t1 is greater than the working temperature threshold and the heat dissipation temperature average t3 is greater than the heat dissipation temperature threshold, a rapid temperature rise signal is generated.

3. The DC motor based on temperature early warning feedback according to claim 1 is characterized in that: The method for the heat dissipation analysis unit to generate a temperature exceeding standard signal is: The heat dissipation analysis unit calculates the ratio of the working temperature average t1 and the ambient temperature average t2 to obtain the operating temperature ratio T. The heat dissipation analysis unit compares the operating temperature ratio T with a preset ratio threshold. If the operating temperature ratio is greater than the preset ratio threshold, a temperature excess signal is generated. If the operating temperature ratio is less than or equal to the preset ratio threshold, a temperature normal signal is generated.

4. The DC motor based on temperature early warning feedback according to claim 1, characterized in that: The early warning unit obtains the working temperature T1 through temperature monitoring, compares the working temperature T1 with the preset working temperature threshold, and generates an over-temperature signal if the working temperature T1 is greater than the preset working temperature threshold, and does not respond if the working temperature T1 is less than or equal to the preset working temperature threshold; The early warning reminder unit generates a low-risk alarm for the motor after obtaining the insufficient heat dissipation signal and the temperature exceeding the standard signal through the heat dissipation analysis unit, and generates a high-risk alarm for the motor after obtaining the excessive heat generation signal and the rapid temperature rise signal through the heat dissipation analysis unit.

Images