Temperature compensation control device for servo hub motor

Abstract

The utility model provides a temperature compensation control device for a servo hub motor, which comprises a control assembly, and the control assembly comprises a motor main body, a current sensor, a motor shaft, a driving circuit board, a limiting groove, a clamping groove, an RTC temperature sensor, a mounting ring, a rectangular hole, a positioning rod, a moving block, a spring and a clamping block. According to the utility model, the RTC temperature sensors are respectively arranged in three groups of UVW windings of the motor main body correspondingly, temperature limiting current is obtained through an error value between the current temperature of the motor main body and an over-temperature threshold value by inquiring a preset temperature calibration value table and multiplying the error value by temperature and current coefficients, then the temperature limiting current is compared with real-time given control current, and final output control current is calculated. Meanwhile, a single damaged RTC temperature sensor can be taken down and replaced, the maintenance cost is reduced, the drive circuit board and the hub motor are integrated, the RTC temperature sensor measures the temperature point of the motor, the temperature measurement resolution can be improved, and finally the precision and sensitivity of temperature compensation control are improved.

Description

Technical Field

[0001] The utility model relates to a temperature compensation control device, in particular to a temperature compensation control device for a servo hub motor, and belongs to the technical field of servo hub motors. Background Art

[0002] In-wheel motor technology is a new type of drive technology that integrates the motor directly into the wheel hub. Its development background is that with the popularization of new energy vehicles such as electric vehicles and electric bicycles, the demand for efficient, lightweight and environmentally friendly drive systems is growing. Traditional drive systems usually use components such as motors, reducers, differentials, etc., which have complex structures, heavy weight and low efficiency. In-wheel motor technology simplifies the drive system structure, reduces weight and improves efficiency by integrating the motor directly into the wheel hub;

[0003] At present, in the control of low-speed hub motors, temperature detection or no temperature detection method is limited to motor over-temperature protection. During use, the motor is prone to high temperature state due to its high power density, thereby triggering an over-temperature alarm. It takes a certain amount of time to wait for the motor temperature to drop to a temperature where it can continue to work before restarting, which will reduce work efficiency. Therefore, a temperature compensation control device for a servo hub motor is proposed. Utility Model Content

[0004] In view of this, the utility model provides a temperature compensation control device for a servo hub motor to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the utility model is implemented as follows: a temperature compensation control device for a servo hub motor, comprising a control assembly, wherein the control assembly comprises a motor body, a current sensor, a motor shaft, a drive circuit board, a limit slot, a card slot, an RTC temperature sensor, a mounting ring, a rectangular hole, a positioning rod, a moving block, a spring, and a card block;

[0006] A motor shaft is provided on the motor body, a driving circuit board is provided on the motor shaft, a current sensor is fixedly connected to the left side of the driving circuit board, a plurality of limit grooves are provided in a ring shape on the driving circuit board, a clamping slot is provided on the inner wall of one side of the limit groove, a plurality of RTC temperature sensors are movably contacted with the left side of the driving circuit board, a mounting ring is fixedly connected to the RTC temperature sensor, two rectangular holes are provided on the mounting ring, a positioning rod is welded between the inner walls on both sides of the rectangular hole, a moving block is slidably connected to the positioning rod, a spring is welded between one side of the moving block and the inner wall of one side of the corresponding rectangular hole, a clamping block is fixedly connected to the other side of the moving block, and the clamping block is clamped in the corresponding clamping slot.

[0007] Further preferably, the spring is movably sleeved on the corresponding positioning rod.

[0008] Further preferably, the moving block is in movably contact with the corresponding limiting groove.

[0009] Further preferably, the control component also includes a current conversion module and a time recorder;

[0010] The right side of the driving circuit board is fixedly connected with a current conversion module and a time recorder.

[0011] Further preferably, the driving circuit board, the current conversion module and the time recorder are electrically connected via a conductive line.

[0012] Further preferably, a limiting hole is provided on the moving block, and the moving block is slidably connected to the corresponding positioning rod through the limiting hole.

[0013] Further preferably, a memory is provided on the driving circuit board.

[0014] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0015] 1. The utility model respectively corresponds the RTC temperature sensor to the UVW three winding groups of the motor body, and obtains the temperature limit current by querying the prefabricated temperature calibration value table through the error value between the current temperature of the motor body and the over-temperature threshold, multiplying it by the temperature and current coefficient, and then comparing it with the real-time given control current to calculate the final output control current. The prefabricated temperature calibration value table is made into a table by experimentally measuring the relationship between the motor body current and the motor body temperature, and is pre-stored in the memory in the driver circuit board. At the same time, a single damaged RTC temperature sensor can be removed and replaced to reduce maintenance costs. First, the temperature of the motor used is calibrated, and a data table is prefabricated. Then, the table is looked up and calculated during use. The driver circuit board is integrated with the hub motor. The RTC temperature sensor measures the temperature point of the motor, which can improve the temperature measurement resolution and ultimately improve the accuracy and sensitivity of temperature compensation control.

[0016] 2. The utility model measures the error between the current temperature of the motor body and the over-temperature threshold, obtains the temperature limiting current through the RTC temperature sensor and the current conversion module, and then compares it with the real-time given control current to calculate the final output control current. The RTC temperature sensor and the current conversion module obtain the relationship between the temperature corresponding to different currents and the heat dissipation coefficient of the motor body and time, and obtains the conversion formula by testing a certain number of servo hub motors to obtain the output current of the control motor.

[0017] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0020] Figure 2 It is a left-side three-dimensional structural diagram of the utility model;

[0021] Figure 3 It is a partial three-dimensional structural diagram of the utility model;

[0022] Figure 4 It is a three-dimensional structural diagram of the driving circuit board of the utility model.

[0023] Figure numerals: 1. control component; 2. motor body; 3. current conversion module; 4. current sensor; 5. motor shaft; 6. drive circuit board; 7. limit slot; 8. card slot; 9. RTC temperature sensor; 10. mounting ring; 11. rectangular hole; 12. positioning rod; 13. moving block; 14. spring; 15. card block; 16. time recorder. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] Embodiment 1

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, the embodiment of the utility model provides a temperature compensation control device for a servo hub motor, including a control component 1, the control component 1 includes a motor body 2, a current sensor 4, a motor shaft 5, a drive circuit board 6, a limit groove 7, a card slot 8, an RTC temperature sensor 9, a mounting ring 10, a rectangular hole 11, a positioning rod 12, a moving block 13, a spring 14, and a card block 15;

[0028] A motor shaft 5 is provided on the motor body 2, and a driving circuit board 6 is provided on the motor shaft 5. A current sensor 4 is fixedly connected to the left side of the driving circuit board 6. A plurality of limiting grooves 7 are provided in a ring shape on the driving circuit board 6. A card slot 8 is provided on the inner wall of one side of the limiting groove 7. A plurality of RTC temperature sensors 9 are movably contacted on the left side of the driving circuit board 6. A mounting ring 10 is fixedly connected to the RTC temperature sensor 9. Two rectangular holes 11 are provided on the mounting ring 10. A positioning rod 12 is welded between the inner walls on both sides of the rectangular hole 11. A moving block 13 is slidably connected to the positioning rod 12. A spring 14 is welded between one side of the moving block 13 and the inner wall of one side of the corresponding rectangular hole 11. The other side of the moving block 13 is provided with a spring 14. A card block 15 is fixedly connected to one side, and the card block 15 is clamped in the corresponding card slot 8. The RTC temperature sensor 9 is respectively connected to the UVW three winding groups of the motor body 2. The error value between the current temperature of the motor body 2 and the over-temperature threshold is queried through the prefabricated temperature calibration value table, multiplied by the temperature and current coefficient, to obtain the temperature limiting current, and then compared with the real-time given control current to calculate the final output control current. The prefabricated temperature calibration value table is made into a table by experimentally measuring the relationship between the current of the motor body 2 and the temperature of the motor body 2, and is pre-stored in the memory in the driving circuit board 6. At the same time, a single damaged RTC temperature sensor 9 can be removed and replaced to reduce maintenance costs.

[0029] In one embodiment, the spring 14 is movably mounted on the corresponding positioning rod 12, and the moving block 13 is movably in contact with the corresponding limiting groove 7. The setting of the spring 14 plays a role of resetting.

[0030] In one embodiment, a limiting hole is provided on the moving block 13, and the moving block 13 is slidably connected to the corresponding positioning rod 12 through the limiting hole. The setting of the limiting hole plays a limiting role.

[0031] In one embodiment, a memory is provided on the driving circuit board 6, and the memory serves to store data.

[0032] Embodiment 2

[0033] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a temperature compensation control device for a servo hub motor, and the control component 1 also includes a current conversion module 3 and a time recorder 16;

[0034] The right side of the driving circuit board 6 is fixedly connected with the current conversion module 3 and the time recorder 16 .

[0035] In one embodiment, the driving circuit board 6, the current conversion module 3 and the time recorder 16 are electrically connected through a conductive line. The temperature limiting current is obtained through the error value between the current temperature of the motor body 2 and the over-temperature threshold through the RTC temperature sensor 9 and the current conversion module 3, and then compared with the real-time given control current to calculate the final output control current, wherein the RTC temperature sensor 9 and the current conversion module 3 are obtained through the temperature corresponding to different currents and the heat dissipation coefficient of the motor body 2, and the relationship with time.

[0036] The utility model is in operation: when in use, the RTC temperature sensor 9 is respectively connected to the UVW three winding groups of the motor body 2. The temperature compensation control scheme 1: through the error value between the current temperature of the motor body 2 and the over-temperature threshold, by querying the prefabricated temperature calibration value table, multiplying by the temperature and current coefficient, the temperature limit current is obtained, and then compared with the real-time given control current, and the final output control current is calculated. The prefabricated temperature calibration value table is made into a table by experimentally measuring the relationship between the current of the motor body 2 and the temperature of the motor body 2, and is pre-stored in the memory of the driving circuit board 6. The temperature compensation control scheme 2: through the error value between the current temperature of the motor body 2 and the over-temperature threshold, through the RT C temperature sensor 9 and current conversion module 3, obtain temperature limit current, and then compare it with real-time given control current to calculate final output control current, wherein RTC temperature sensor 9 and current conversion module 3, through the temperature corresponding to different currents and heat dissipation coefficient of motor body 2, and the relationship with time, derive that when RTC temperature sensor 9 is damaged, by moving two relative moving blocks 13, moving block 13 slides on corresponding positioning rod 12 and compresses spring 14, moving block 13 drives corresponding card block 15 to move, so that card block 15 is separated from corresponding card slot 8, thereby damaged RTC temperature sensor 9 can be removed for replacement, reducing maintenance cost.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A temperature compensation control device for a servo hub motor, comprising a control component (1), characterized in that: The control component (1) comprises a motor body (2), a current sensor (4), a motor shaft (5), a drive circuit board (6), a limit slot (7), a clamping slot (8), an RTC temperature sensor (9), a mounting ring (10), a rectangular hole (11), a positioning rod (12), a moving block (13), a spring (14), and a clamping block (15); The motor body (2) is provided with a motor shaft (5), the motor shaft (5) is provided with a driving circuit board (6), the left side of the driving circuit board (6) is fixedly connected with a current sensor (4), the driving circuit board (6) is provided with a plurality of limiting grooves (7) in an annular shape, a clamping groove (8) is provided on the inner wall of one side of the limiting groove (7), the left side of the driving circuit board (6) is movably contacted with a plurality of RTC temperature sensors (9), the RTC temperature sensor (9) is fixedly connected with a mounting ring (10), the mounting ring (10) is provided with two rectangular holes (11), a positioning rod (12) is welded between the inner walls of both sides of the rectangular hole (11), a moving block (13) is slidably connected to the positioning rod (12), a spring (14) is welded between one side of the moving block (13) and the inner wall of one side of the corresponding rectangular hole (11), a clamping block (15) is fixedly connected to the other side of the moving block (13), and the clamping block (15) is clamped with the corresponding clamping groove (8).

2. The temperature compensation control device for a servo hub motor according to claim 1, characterized in that: The spring (14) is movably sleeved on the corresponding positioning rod (12).

3. The temperature compensation control device for a servo hub motor according to claim 1, characterized in that: The moving block (13) is in active contact with the corresponding limiting groove (7).

4. The temperature compensation control device for a servo hub motor according to claim 1, characterized in that: The control component (1) also includes a current conversion module (3) and a time recorder (16); The right side of the driving circuit board (6) is fixedly connected with a current conversion module (3) and a time recorder (16).

5. The temperature compensation control device for a servo hub motor according to claim 4, characterized in that: The driving circuit board (6), the current conversion module (3) and the time recorder (16) are electrically connected via a conductive line.

6. The temperature compensation control device for a servo hub motor according to claim 1, characterized in that: The moving block (13) is provided with a limiting hole, and the moving block (13) is slidably connected to the corresponding positioning rod (12) via the limiting hole.

7. The temperature compensation control device for a servo hub motor according to claim 1, characterized in that: The driving circuit board (6) is provided with a memory.

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