Self-cooled electromagnetic braking variable-pitch permanent magnet motor

Abstract

The utility model discloses a self-cooled electromagnetic braking variable-pitch permanent magnet motor, relates to the technical field of variable-pitch motors, and is used for solving the technical problems of relatively heavy weight, low efficiency, large cogging torque, large vibration, material waste and poor starting performance of the existing variable-pitch permanent magnet motor. In the self-cooled electromagnetic braking variable-pitch permanent magnet motor, a rotor is of an inverted V-shaped structure formed by segmental pole staggering, and an iron core of the rotor is provided with circular ventilation holes, so that a channel can be formed when the rotor rotates, and internal circulation is accelerated; a punching sheet of the rotor adopts a symmetrical slot structure so as to reduce the cogging torque between the stator and the rotor and reduce the magnetic leakage at the same time; the arrangement of the magnetic steel structure of the rotor is linear, and the punching sheet structure of the rotor is V-shaped.

Description

Technical Field

[0001] The utility model relates to the technical field of variable pitch motors, in particular to a self-cooling electromagnetic braking variable pitch permanent magnet motor, in particular to an ultra-high efficiency self-cooling electromagnetic braking variable pitch permanent magnet motor. Background Art

[0002] At present, due to the key technical problems of DC motors, such as complex structure, easy commutation jam, complex maintenance, easy ring fire during high-speed operation, short maintenance cycle, etc., and the traditional three-phase asynchronous motor has simple structure, but poor starting performance, large starting current, difficult to control, weak overload capacity and other technical problems. Therefore, the ultra-high efficiency self-cooling electromagnetic brake variable pitch permanent magnet motor has emerged, which has compact structure, high power density, high material utilization rate, small motor loss and high motor efficiency; compared with DC motors, it has simple structure, convenient maintenance, stable operation, and can operate at high and low speeds; compared with squirrel cage three-phase asynchronous motors, its rotor magnetic field distribution and stator tooth distribution are more reasonable, with good starting performance, small starting current, strong overload capacity, large output torque, stable control, and small cogging torque, which can reduce the motor vibration caused by cogging torque.

[0003] In other words, the permanent magnet motor rotor structure in the prior art has the following main defects: (1) the overall material cost is relatively high; (2) the structure is bulky, the production efficiency is low, and the labor cost is high; (3) the cogging torque is large and the starting is unstable; (4) the structure is unreasonable and the motor performance is unstable.

[0004] Therefore, how to provide a self-cooling electromagnetic braking variable pitch permanent magnet motor that can effectively improve the performance of the motor as a whole, reduce starting pulsation, and improve motor efficiency has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The utility model aims to provide a self-cooling electromagnetic braking variable pitch permanent magnet motor, which is used to solve the technical problems of the existing variable pitch permanent magnet motor being bulky, low in efficiency, large cogging torque, large vibration, material waste, and poor starting performance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A self-cooling electromagnetic braking variable pitch permanent magnet motor comprises: a rotor, wherein the rotor adopts segmented staggered poles to form an inverted V-shaped structure, and the iron core of the rotor is provided with circular ventilation holes to ensure that the rotor can form a channel when rotating and accelerate internal circulation; the punching sheets of the rotor adopt a symmetrical groove structure to reduce the cogging torque between the stator and rotor, and reduce magnetic leakage at the same time; the magnetic steel structure of the rotor is arranged in a straight line, and the punching sheet structure of the rotor adopts a V-shaped structure.

[0008] The rotor is composed of a main shaft and a rotor core, and the rotor magnetic field is in a sinusoidal form.

[0009] Specifically, the self-cooling electromagnetic braking variable pitch permanent magnet motor further includes: an electromagnetic brake, and the electromagnetic brake cooperates with a rotary transformer to achieve perfect external output position accuracy.

[0010] Furthermore, the rotor core and the stator core are both made of laminated silicon steel sheets with a thickness of 0.35 mm.

[0011] Furthermore, an A-type key is provided at the head end of the main shaft, and the main shaft and the front end cover are sealed with an oil seal.

[0012] Wherein, a main machine base and a rear machine base are arranged between the front end cover and the rear end cover, and an intermediate end cover is arranged between the main machine base and the rear machine base;

[0013] The main engine base is provided with a quick power aviation plug, and the rear engine base is provided with a quick control aviation plug; and a motor lifting lug is provided in the middle area of ​​the main engine base.

[0014] Specifically, the main shaft is provided with a front end bearing and a rear end bearing of the motor, and the front end bearing and the rear end bearing are provided with bearing inner covers.

[0015] Furthermore, the rotary transformer is assembled on the tail end of the main shaft through a rotary transformer mounting device.

[0016] Compared with the prior art, the self-cooling electromagnetic braking variable pitch permanent magnet motor described in the utility model has the following advantages:

[0017] In the self-cooling electromagnetic braking variable pitch permanent magnet motor provided by the utility model, the rotor adopts a symmetrical staggered pole structure design, which looks like the letter V shape; the running trajectory of the rotor ventilation duct is reasonably planned, and the air duct inside the rotor core reasonably allows the internal circulation to take away the heat inside the motor; the circular ventilation holes on the rotor core and the V-shaped grooves of the rotor core form an air duct circulation path; the rotor core is staggered in sections, so that the tooth slot torque of the rotor and stator teeth is greatly reduced, the static operation of the stator and rotor is smoother, and the pulsation of the motor is reduced during low-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a self-cooling electromagnetic braking variable pitch permanent magnet motor provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the rotor core in a self-cooling electromagnetic braking variable pitch permanent magnet motor provided in an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1-A-type key; 2-oil seal; 3-front cover; 4-front bearing; 5-main shaft; 6-rotor core; 61-circular ventilation hole; 7-stator core; 8-motor lifting ear; 9-quick power aviation plug; 10-bearing inner cover; 11-rear bearing; 12-middle end cover; 13-quick control aviation plug; 14-electromagnetic brake; 15-rotary transformer; 16-rear cover; 17-rotary transformer mounting device; 18-rear base; 19-main base. DETAILED DESCRIPTION

[0022] For ease of understanding, the self-cooling electromagnetic braking variable pitch permanent magnet motor provided by the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings of the specification.

[0023] The utility model provides a self-cooling electromagnetic brake variable pitch permanent magnet motor, such as Figure 1 and Figure 2 As shown, it includes: a rotor, which adopts segmented staggered poles to form an inverted V-shaped structure, and the iron core of the rotor is provided with a circular ventilation hole 61 to ensure that the rotor can form a channel when rotating and accelerate the internal circulation; the rotor punching adopts a symmetrical groove structure to reduce the tooth slot torque between the stator and the rotor, and at the same time reduce the leakage magnetic field to play a good role in magnetic circuit planning; the magnetic steel structure of the rotor is arranged in a straight line, and the rotor punching structure adopts a V-shaped structure.

[0024] Compared with the prior art, the self-cooling electromagnetic braking variable pitch permanent magnet motor described in the embodiment of the utility model has the following advantages:

[0025] In the self-cooling electromagnetic braking variable pitch permanent magnet motor provided by the embodiment of the utility model, the rotor adopts a symmetrical staggered pole structure design, which looks like the letter V; the running trajectory of the rotor ventilation duct is reasonably planned, and the air duct inside the rotor core reasonably allows the internal circulation to take away the heat inside the motor; the circular ventilation holes on the rotor core and the V-shaped grooves of the rotor core form an air duct circulation path; the rotor core is staggered by segmented poles, so that the tooth slot torque of the rotor and stator teeth is greatly reduced, the static operation of the stator and rotor is smoother, and the pulsation of the motor is reduced during low-speed operation.

[0026] It should be noted here that the self-cooling electromagnetic braking variable pitch permanent magnet motor provided by the embodiment of the utility model obtains the design parameter values ​​of the motor through simulation calculation, and the designed rated torque point and peak torque point both exceed the rated predetermined target point and the peak predetermined target point. The improvement in the structural design greatly improves the performance parameters of the product.

[0027] Among them, Figure 1As shown, the rotor is composed of a main shaft 5 and a rotor core 6, and the rotor magnetic field is in a sinusoidal form, that is, the rotor magnetic field can be sinusoided through a simple assembly structure, which is beneficial to reduce the cogging torque of the stator and rotor, and then increase the smoothness of the rotor; in other words, the cogging torque of the motor is smaller, the high-efficiency working area is larger, and the torque output is more stable.

[0028] Specifically, Figure 1 As shown, the self-cooling electromagnetic braking variable pitch permanent magnet motor provided by the embodiment of the utility model also includes: an electromagnetic brake 14, which cooperates with the rotary transformer 15 to achieve perfect external output position accuracy, thereby not only ensuring the output position of the rotor, but also being able to accurately locate the self-locking position; in other words, through the position control of the rotary transformer 15 and the cooperation of the electromagnetic brake 14, precise position control and torque output can be achieved.

[0029] Furthermore, if Figure 1 As shown, the rotor core 6 and the stator core 7 can be made of 0.35 mm thick silicon steel sheets, and the lamination rate is as high as 98% to 100%. In addition, the end plates are assembled with silicon aluminum alloy, thereby effectively reducing the weight of the rotor and playing a good magnetic isolation role.

[0030] Furthermore, if Figure 1 As shown, the head end of the main shaft 5 may be provided with an A-type key 1 , and the main shaft 5 and the front end cover 3 may be sealed with an oil seal 2 .

[0031] Among them, Figure 1 As shown, a main machine base 19 and a rear machine base 18 may be provided between the front end cover 3 and the rear end cover 16, and an intermediate end cover 12 may be provided between the main machine base 19 and the rear machine base 18;

[0032] The main engine base 19 may be provided with a quick power aviation plug 9 , and the rear engine base 18 may be provided with a quick control aviation plug 13 ; in addition, a motor lifting lug 8 may be provided in the middle area of ​​the main engine base 19 .

[0033] Specifically, Figure 1 As shown, the main shaft 5 may be provided with a front end bearing 4 and a rear end bearing 11 of the motor, and the front end bearing 4 and the rear end bearing 11 may be provided with a bearing inner cover 10 .

[0034] Furthermore, if Figure 1 As shown, the rotary transformer 15 can be assembled on the tail end of the main shaft 5 through a rotary transformer mounting device 17 .

[0035] 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 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 self-cooling electromagnetic brake variable pitch permanent magnet motor, characterized in that: include: The rotor adopts segmented staggered poles to form an inverted V-shaped structure, and the iron core of the rotor is provided with circular ventilation holes to ensure that the rotor can form a channel when rotating and accelerate the internal circulation; the punching sheets of the rotor adopt a symmetrical groove structure to reduce the cogging torque between the stator and the rotor, and at the same time reduce the leakage flux; the magnetic steel structure of the rotor is arranged in a straight line, and the punching sheet structure of the rotor adopts a V-shaped structure.

2. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 1, characterized in that: The rotor is composed of a main shaft and a rotor core, and the rotor magnetic field is in a sinusoidal form.

3. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 2 is characterized in that: Also includes: The electromagnetic brake cooperates with the rotary transformer to achieve perfect external output position accuracy.

4. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 2, characterized in that: The rotor core and the stator core are both made of 0.35 mm thick silicon steel sheets laminated together.

5. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 2, characterized in that: The head end of the main shaft is provided with an A-type key, and the main shaft and the front end cover are sealed with an oil seal.

6. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 5, characterized in that: A main machine base and a rear machine base are arranged between the front end cover and the rear end cover, and an intermediate end cover is arranged between the main machine base and the rear machine base; The main engine base is provided with a quick power aviation plug, and the rear engine base is provided with a quick control aviation plug; and a motor lifting lug is provided in the middle area of ​​the main engine base.

7. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 5, characterized in that: The main shaft is provided with a front end bearing and a rear end bearing of the motor, and the front end bearing and the rear end bearing are provided with bearing inner covers.

8. The self-cooling electromagnetic braking variable pitch permanent magnet motor according to claim 3, characterized in that: The rotary transformer is assembled on the tail end of the main shaft through a rotary transformer mounting device.

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