Electric machine with temperature control

Abstract

The application discloses a motor with temperature control performance, comprising a mounting shell, a rotating shaft, a stator and a rotor; the motor with temperature control performance further comprises a plurality of first temperature sensors, a plurality of second temperature sensors and a controller; the plurality of first temperature sensors are connected to the outer surface of the motor with temperature control performance for detecting the temperature of the outer surface of the motor with temperature control performance; the plurality of second temperature sensors are arranged in the interior of the motor with temperature control performance for detecting the temperature in the interior of the motor with temperature control performance; the plurality of first temperature sensors and the plurality of second temperature sensors are electrically connected to the controller; the controller determines the state of the motor with temperature control performance according to the temperatures detected by the plurality of first temperature sensors and the plurality of second temperature sensors. The interior temperature of the motor with temperature control performance can be maintained in a stable state, thereby guaranteeing smooth operation of the motor and prolonging the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine with temperature control performance. BACKGROUND

[0002] The existing electric machine for textile has a long working time in its application field, and is mostly in an uninterrupted working state. The inner rotor of the electric machine is directly fixed on the rotating shaft and forms a rotating gap with the stator. The heat generated by the coil in the stator under the action of current is difficult to dissipate. The heat is transmitted to the internal rotor and the rotating shaft and other parts through the air in the rotating gap. When the temperature is too high, the internal parts will be deformed. The micro deformation for a long time affects the size of the rotating gap, and the inner rotor and the stator are prone to friction. At the same time, the high temperature is easy to damage the internal coil, thereby further affecting the service life and the smoothness of the electric machine. SUMMARY

[0003] 1. Technical problem to be solved by the present application

[0004] In view of the above problems that the temperature in the existing electric machine for textile cannot be controlled and adjusted in the use process, thereby affecting the service life and the smoothness of the electric machine, the present application provides an electric machine with temperature control performance.

[0005] 2. Technical scheme

[0006] To solve the above problems, the technical scheme provided by the present application is as follows:

[0007] An electric machine with temperature control performance comprises a mounting shell, a rotating shaft, a stator and a rotor. The rotating shaft is rotatably connected to the mounting shell. The stator is fixedly installed on the mounting shell. The rotor is fixed to the end of the rotating shaft. The stator is provided with an iron core. The outer periphery of the iron core is wound with a coil. The outer periphery of the rotor is uniformly distributed with magnetic steel for pushing the rotor to rotate under the action of magnetic force. The electric machine with temperature control performance further comprises a plurality of first temperature sensors, a plurality of second temperature sensors and a controller. The plurality of first temperature sensors are connected to the outer surface of the electric machine with temperature control performance for detecting the temperature of the outer surface of the electric machine with temperature control performance. The plurality of second temperature sensors are arranged in the interior of the electric machine with temperature control performance for detecting the temperature in the interior of the electric machine with temperature control performance. The plurality of first temperature sensors and the plurality of second temperature sensors are electrically connected to the controller. The controller determines the state of the electric machine with temperature control performance according to the temperatures detected by the plurality of first temperature sensors and the plurality of second temperature sensors. The electric machine with temperature control performance is further provided with a cooling device. The cooling device comprises a cooling pump and a connecting pipeline. A cooling passage is formed in the stator. One end of the connecting pipeline is connected to the cooling pump and the other end is connected to the cooling passage in the stator. The cooling pump is electrically connected to the controller. The controller controls the cooling pump to start when the comprehensive temperature calculated according to the detection data exceeds the preset value.

[0008] Further, the motor with temperature control performance further comprises a connecting ring, which is arranged between the mounting shell and the stator and cooperates with the stator, the rotor and the mounting shell to form a rotating gap.

[0009] Further, the first temperature sensors are arranged on the outer surface of the connecting ring, and the second temperature sensors are arranged on the inner surface of the connecting ring.

[0010] Further, the connecting ring is a copper ring or an aluminum ring.

[0011] Further, the first temperature sensors are evenly distributed along the outer side of the connecting ring, and the second temperature sensors are evenly distributed along the inner side of the connecting ring.

[0012] Further, the number of the first temperature sensors is the same as the number of the second temperature sensors, and the first temperature sensors are arranged between two adjacent second temperature sensors.

[0013] Further, the controller calculates the comprehensive temperature according to the temperature values detected by the first temperature sensors and the second temperature sensors according to the following method:

[0014] T=a(T1+T2+T3+...+Tn) / n+b(t1+t2+t3+...+tm) / m

[0015] wherein T is the comprehensive temperature, T1, T2, T3,..., Tn represent the first temperature sensors, t1, t2, t3,..., tm represent the second temperature sensors, and a is less than b.

[0016] Further, a is less than or equal to 0.3, and b is greater than or equal to 0.7.

[0017] Further, the end of the stator away from the mounting shell is provided with a brake coil, the end of the rotor away from the mounting shell is provided with a brake disc, the side of the brake disc facing the brake coil is provided with a brake for cooperating with the brake coil, the brake and the brake disc form an integral whole and have a through hole, and the brake and the brake disc are fixedly connected to the rotor by means of screws passing through the through hole and being screwed into the fixing holes formed in the rotor.

[0018] Further, the cooling channel is a spiral channel formed in the outer shell of the stator, and the inner diameter of the cooling channel ranges from 0.5 cm to 1 cm.

[0019] 3. Advantages

[0020] Compared with the prior art, the technical scheme provided by the present application has the following advantages:

[0021] The motor with temperature control performance can accurately detect the temperature in the motor, and control the temperature in the motor according to the detected temperature value, so that the temperature in the motor can be maintained in a stable state, thereby ensuring smooth operation of the motor and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The schematic diagram of the motor with temperature control performance is provided for the embodiments of the present application.

[0023] The motor 10 with temperature control performance is provided with a mounting shell 11, a rotating shaft 12, a stator 13, a rotor 14, an iron core (not shown), a coil 15, a magnetic steel 16, a first temperature sensor 17, a second temperature sensor 18, a controller (not shown), a cooling pump (not shown), a connecting pipeline 19, a cooling passage 20, a connecting ring 21, a rotating gap 22, a brake disc 23, a brake 24, and a brake coil 25. DETAILED DESCRIPTION

[0024] In order to further understand the present application, the present application will be described in detail with reference to the drawings and embodiments.

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are for the convenience of describing the technical solutions of the invention and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of the invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this invention.

[0026] Example 1

[0027] like Figure 1 As shown, a temperature-controlled motor 10 according to the present invention includes: a mounting housing 11, a rotating shaft 12, a stator 13, and a rotor 14. The rotating shaft 12 is rotatably connected to the mounting housing 11. The stator 13 is fixedly mounted to the mounting housing 11. The rotor 14 is fixed to the end of the rotating shaft 12. An iron core is provided inside the stator 13. A coil 15 is wound around the outer periphery of the iron core. Magnets 16 for driving the rotor 14 to rotate under magnetic force are evenly distributed around the outer periphery of the rotor 14. The stator 13 is sleeved on the outer periphery of the rotor 14, forming a rotational gap 22 between the stator 13 and the rotor 14.

[0028] As a further solution, the temperature-controlled motor 10 further comprises a plurality of first temperature sensors 17, a plurality of second temperature sensors 18 and a controller. The plurality of first temperature sensors 17 are connected to the outer surface of the temperature-controlled motor 10, and can detect the temperature of the outer surface of the motor during operation of the motor. The plurality of second temperature sensors 18 are arranged inside the temperature-controlled motor 10, and can detect the temperature inside the motor during operation of the motor. The plurality of first temperature sensors 17 and the plurality of second temperature sensors 18 are electrically connected to the controller, so as to send the detected temperature information to the controller. The controller calculates the state of the temperature-controlled motor 10, i.e. the overall temperature state, according to the temperature information detected by the plurality of first temperature sensors 17 and the plurality of second temperature sensors 18.

[0029] Specifically, the controller calculates the comprehensive temperature according to the temperature values detected by the plurality of first temperature sensors 17 and the plurality of second temperature sensors 18 as follows:

[0030] T = a (T1 + T2 + T3 +... + Tn) / n + b (t1 + t2 + t3 +... + tm) / m

[0031] wherein T is the comprehensive temperature, T1, T2, T3,... Tn all represent the first temperature sensors 17, t1, t2, t3,... tm all represent the second temperature sensors 18, and a is less than b. By such a calculation method, the real-time temperature condition of the motor can be accurately calculated. In the calculation process, the value of the coefficient a is set to be less than the value of the coefficient b, so as to increase the weight of the internal temperature of the motor shell in the calculation process, and thus the temperature inside the motor is taken as an important parameter in the calculation of the overall temperature. Single detection of the external temperature cannot accurately detect the temperature inside the motor, and thus the case of high internal temperature affecting operation is ignored. Single detection of the internal temperature ignores the heat dissipation performance, and the motor will be immediately controlled to stop working when the internal temperature reaches a high temperature, which is not conducive to smooth operation. The weight calculation method of the present solution can effectively avoid the above problems, and can monitor and calculate the operating parameters of the motor at any time, and control the operation of the motor according to the high operating parameters, i.e. the temperature state value, to further ensure the smoothness of the operation of the motor.

[0032] Further, the coefficient a in the above solution is set to be less than or equal to 0.3, and the coefficient b is set to be greater than or equal to 0.7. Such weight coefficient setting can control the temperature value during operation to a more reasonable state, and takes into account the heat dissipation performance of the product body surface to control the operation of the motor.

[0033] As a further solution, the motor 10 with temperature control function is further provided with a cooling device, which comprises a cooling pump and a connecting pipeline 19, and a cooling passage 20 is formed in the stator 13, and the connecting pipeline 19 is connected to the cooling pump at one end and connected to the cooling passage 20 in the stator 13 at the other end. The cooling pump is electrically connected to the controller, and the controller controls the cooling pump to start when the comprehensive temperature calculated by the controller according to the detection data exceeds a preset value. The comprehensive temperature here is the temperature value parameter calculated by the controller. When the value of the comprehensive temperature exceeds the preset value, the controller controls the cooling pump to circulate the cooling liquid in the connecting pipeline 19 and the cooling passage 20. In this embodiment, the cooling passage 20 is arranged in the stator 13 and directly communicates with the connecting pipeline 19 for circulating the cooling liquid, without additional cooling circuit, small structure volume, and better cooling effect of direct cooling of the stator 13. Through the above temperature calculation method, the body surface heat dissipation is taken into account, and when the calculated comprehensive temperature reaches a threshold value, it is calculated that the body surface can dissipate heat to maintain the internal temperature stable and safe, and when the calculated comprehensive temperature reaches another threshold value, the controller controls the circulation of the cooling liquid to perform liquid circulation cooling. In this way, the temperature detection and the cooling device are combined, the cooling effect is good, the energy consumption is low, the installation volume is small, the temperature in the motor can be accurately detected, and the temperature in the motor can be controlled according to the calculation of the detected temperature value, so that the temperature in the motor can be maintained in a stable operating state, thereby ensuring smooth operation of the motor and prolonging the service life.

[0034] As a specific embodiment, the motor 10 with temperature control function further comprises a connecting ring 21 arranged between the mounting shell 11 and the stator 13, and the connecting ring 21, the stator 13, the rotor 14 and the mounting shell 11 together form a rotating gap 22. During installation, the stator 13, the connecting ring 21 and the mounting shell 11 are fixed into a whole by screws. A plurality of first temperature sensors 17 are connected to the outer surface of the connecting ring 21, and a plurality of second temperature sensors 18 are connected to the inner surface of the connecting ring 21. In this way, the connecting ring 21, the first temperature sensors 17 and the second temperature sensors 18 are installed and disassembled as a whole, without affecting the installation and arrangement of other components in the motor, and the disassembly structure is simpler and can be disassembled according to actual needs.

[0035] As a specific embodiment, the cooling passage 20 is a spiral passage formed in the shell of the stator 13, and the inner diameter of the cooling passage 20 ranges from 0.5 cm to 1 cm. Such cooling effect is better, and the cooling passage 20 with the inner diameter ranging from 0.5 cm to 1 cm can ensure the heat transfer efficiency of the cooling liquid, avoid the incomplete heat absorption caused by the too large diameter of the passage, and avoid the low heat absorption efficiency caused by the too small diameter of the passage. The incomplete heat absorption here refers to that the cooling liquid at the center of the passage is circulated to the outside of the passage without absorbing heat, and the low heat absorption efficiency refers to that the flow of the cooling liquid in the passage is small, the heat absorption efficiency is low, and the expected cooling effect cannot be achieved.

[0036] As an optional embodiment, the connecting ring 21 is a copper ring or an aluminum ring, and such temperature transfer is better. Sealing rings can also be arranged on both sides of the connecting ring 21.

[0037] As a specific embodiment, the first temperature sensors 17 are evenly distributed along the outer side of the connecting ring 21, and the second temperature sensors are evenly distributed along the inner side of the connecting ring 21. The number of the first temperature sensors 17 is the same as the number of the second temperature sensors 18, and the first temperature sensors 17 are arranged between two adjacent second temperature sensors 18, that is, the first temperature sensors 17 on the outer side of the connecting ring 21 and the second temperature sensors 18 on the inner side of the connecting ring 21 are arranged alternately, and such arrangement is more balanced for the detection of the overall temperature.

[0038] As a specific embodiment, the end of the stator 13 away from the mounting shell 11 is provided with a brake coil 25, the end of the rotor 14 away from the mounting shell 11 is provided with a brake disc 23, and the side of the brake disc 23 facing the brake coil 25 is provided with a brake 24 for cooperating with the brake coil 25. The brake 24 and the brake disc 23 form a mounting whole and have a through hole, and the brake 24 and the brake disc 23 are fixedly connected to the rotor 14 by screws passing through the through hole and being screwed into the fixing hole of the rotor 14. The controller controls the on-off of the brake coil 25 to control the emergency braking of the motor when the internal temperature of the motor is too high. The brake current of the motor is greatly reduced by adding the brake 24 at the end of the rotor 14 during high-speed braking, thereby avoiding the further increase of the internal temperature of the motor due to the brake current, reducing the risk of temperature rise, and saving costs. The reduction of the brake current of the motor greatly reduces the demagnetization of the magnet steel 16 of the motor, and the risk of demagnetization is reduced, thereby prolonging the service life of the motor.

[0039] The above describes the present application and its embodiments in a schematic manner, and the description is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, and all of them shall belong to the protection scope of the present application.

Claims

1. An electric machine having temperature control performance, comprising: The installation shell, the rotating shaft, the stator and the rotor; the rotating shaft is rotatably connected to the installation shell; The stator is fixedly installed on the installation shell; The rotor is fixed to the end of the rotating shaft; the stator is provided with an iron core; the outer periphery of the iron core is wound with a coil; the outer periphery of the rotor is uniformly distributed with magnetic steel for pushing the rotor to rotate under the action of magnetic force; characterized in that the motor with temperature control performance further comprises a plurality of first temperature sensors, a plurality of second temperature sensors and a controller; a plurality of first temperature sensors are connected to the outer surface of the motor with temperature control performance for detecting the temperature of the outer surface of the motor with temperature control performance; a plurality of second temperature sensors are arranged inside the motor with temperature control performance for detecting the temperature inside the motor with temperature control performance; a plurality of first temperature sensors and a plurality of second temperature sensors are electrically connected to the controller; the controller determines the state of the motor with temperature control performance according to the temperature detected by a plurality of first temperature sensors and a plurality of second temperature sensors; the motor with temperature control performance is also provided with a cooling device; the cooling device comprises a cooling pump and a connecting pipeline; a cooling passage is formed in the stator; one end of the connecting pipeline is connected to the cooling pump and the other end is connected to the cooling passage in the stator; the cooling pump is electrically connected to the controller; the controller controls the cooling pump to start when the comprehensive temperature calculated according to the detection data exceeds the preset value; The method for calculating the comprehensive temperature according to the temperature values detected by a plurality of first temperature sensors and a plurality of second temperature sensors by the controller is as follows: T=a(T1+T2+T3+...+Tn) / n+b(t1+t2+t3+...+tm) / m Wherein, T is the comprehensive temperature, T1, T2, T3...Tn respectively represent the temperature detected by a plurality of first temperature sensors, t1, t2, t3...tm respectively represent the temperature detected by a plurality of second temperature sensors, a and b are coefficients, and a is less than b.

2. The motor with temperature control performance according to claim 1, wherein The motor with temperature control performance further comprises a connecting ring; the connecting ring is arranged between the installation shell and the stator, and cooperates with the stator, the rotor and the installation shell to form a rotating gap.

3. The motor with temperature control performance according to claim 2, wherein A plurality of first temperature sensors are connected to the outer surface of the connecting ring; a plurality of second temperature sensors are connected to the inner surface of the connecting ring.

4. The motor with temperature control performance according to claim 3, wherein The connecting ring is a copper ring or an aluminum ring.

5. The motor with temperature control performance according to claim 3, wherein A plurality of first temperature sensors are uniformly distributed along the outer side of the connecting ring in the circumferential direction; a plurality of second temperature sensors are uniformly distributed along the inner side of the connecting ring in the circumferential direction.

6. The motor with temperature control performance according to claim 5, wherein The number of the first temperature sensors is the same as the number of the second temperature sensors; the first temperature sensors are arranged between two adjacent second temperature sensors.

7. The temperature-controlled motor of claim 1, wherein, a is less than or equal to 0.3, and b is greater than or equal to 0.

7.

8. The temperature-controlled motor of claim 1, wherein, an end of the stator away from the mounting shell is provided with a brake coil; an end of the rotor away from the mounting shell is provided with a brake disc; a side of the brake disc facing the brake coil is provided with a brake for cooperating with the brake coil; the brake and the brake disc form an integral whole and jointly form a through hole; the brake and the brake disc are fixedly connected to the rotor by a screw passing through the through hole and being screwed into a fixing hole formed in the rotor.

9. The temperature-controlled motor of claim 1, wherein, the cooling passage is a spiral passage formed in the shell of the stator; the inner diameter of the cooling passage ranges from 0.5 cm to 1 cm.

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