Torque compensation device of permanent magnet motor

Abstract

The utility model belongs to the technical field of motor control, and discloses a permanent magnet motor torque compensation device, which comprises a box body, a first torque module, a second torque module, a compensation amount receiving module and a compensation module are respectively arranged in the box body, two sides of the box body are respectively provided with a heat dissipation hole plate, two sides of the heat dissipation hole plate are respectively provided with a first mounting groove and a second mounting groove, and the first mounting groove and the second mounting groove are respectively provided with a first mounting groove and a second mounting groove. And a plurality of rotating rods are rotationally connected between the first mounting groove and the second mounting groove, one side of each rotating rod is fixedly connected with a dust baffle, one end of each rotating rod extends into the first mounting groove and is fixedly connected with a first gear, and a sliding groove is vertically formed in the first mounting groove. According to the device, heat in the box body can be discharged from the heat dissipation hole plate, the first torque module, the second torque module, the compensation amount receiving module and the compensation module can achieve the rapid cooling effect, and the situation that the temperature of internal elements is too high, normal use is affected, compensation efficiency is reduced, and even faults occur is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor control, and more specifically, particularly relates to a permanent magnet motor torque compensation device. Background Art

[0002] At present, variable frequency air conditioning compressors widely use the control method of permanent magnet synchronous motor without position sensor. For single-rotor variable frequency compressors, due to their periodic intake and exhaust, the load torque is unbalanced, which easily leads to vibration. Especially at low frequencies, the vibration phenomenon is more obvious, resulting in greater pipeline stress and noise. For this reason, single-rotor variable frequency compressors widely use torque feedforward compensation to reduce vibration. In the prior art, there are two ways of torque feedforward compensation: (1) According to the predetermined torque compensation curve, it is solidified into a table. This method requires the compensation curve to be re-corrected for different compressors, and has poor adaptability. (2) Using online calculation. When using the online compensation method, it often leads to insufficient compensation strength, and the load torque is calculated using an open-loop method, which is easy to introduce greater interference, resulting in poor compensation effect.

[0003] Patent application number CN201611044620.0 discloses a permanent magnet motor torque compensation method and device, wherein the method includes: obtaining the driving torque of the motor; obtaining the load torque of the motor according to the first speed signal of the motor; obtaining the compensation amount according to the driving torque and the load torque; and outputting a compensation signal for characterizing the compensation amount to the motor. Thus, the compensation for the motor load torque can be determined according to the load torque and the driving torque, thereby realizing adaptive compensation for the motor load torque.

[0004] However, in actual use, the permanent magnet motor torque compensation device in the above technical solution is prone to excessive temperature of internal components of the compensation device due to continuous use of the permanent magnet motor, thereby affecting the normal use of the compensation device, reducing the compensation efficiency, and even causing failures.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a permanent magnet motor torque compensation device is provided to achieve a more practical purpose. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a permanent magnet motor torque compensation device, which is achieved by the following specific technical means:

[0007] A permanent magnet motor torque compensation device comprises a box body, wherein a torque module 1, a torque module 2, a compensation amount receiving module and a compensation module are respectively arranged inside the box body, heat dissipation holes are respectively arranged on both sides of the box body, and mounting grooves 1 and 2 are respectively arranged on both sides of the heat dissipation holes, a plurality of rotating rods are rotatably connected between the mounting grooves 1 and 2, and a dust shield plate is fixedly connected on one side of the plurality of rotating rods, one end of the plurality of rotating rods extends to the inside of the mounting groove 1 and is fixedly connected with a gear 1, a slide groove is vertically arranged inside the mounting groove 1, a movable plate is slidably connected inside the slide groove, a tooth plate 1 is arranged on one side of the movable plate, and the tooth plate 1 is meshed with the gear 1.

[0008] Furthermore, a pair of driving motors are installed on one side of the interior of the mounting groove one, and the output ends of the pair of driving motors are fixedly connected to gear two, and the other side of the pair of movable plates is provided with toothed plates two, and the pair of toothed plates two are meshed with the pair of gears two.

[0009] Furthermore, a temperature sensor is installed inside the box, and the temperature sensor is electrically connected to the drive motor through a wire.

[0010] Furthermore, the torque module 1, the torque module 2, the compensation amount receiving module and the compensation module are electrically connected in sequence through wires.

[0011] Furthermore, the plurality of dust shields are arranged in close contact from bottom to top, and the plurality of dust shields are all located on one side of the heat dissipation hole plate.

[0012] Furthermore, a wiring groove is provided at the bottom end of one side of the box body.

[0013] Furthermore, an inspection cover is installed on the top of the box body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] A permanent magnet motor torque compensation device in the utility model, through the coordinated use of a temperature sensor, a drive motor, a second gear and a second tooth plate, is convenient for driving a movable plate to move up and down in a slide groove, thereby utilizing the mutual engagement of the tooth plate and the first gear to drive the rotating rod to rotate, and then realize the flipping of the dust shield, so that the heat inside the box can be discharged from the heat dissipation hole plate, so that the torque module one, the torque module two, the compensation amount receiving module and the compensation module can achieve the effect of rapid cooling, avoiding the internal component temperature from being too high, affecting normal use, reducing the compensation efficiency, and even causing malfunctions. At the same time, the heat dissipation hole plate can be blocked by resetting the dust shield, and when the temperature of the internal components is normal, the external dust is reduced from entering the box through the heat dissipation hole plate to affect the normal use of the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0017] Figure 2 It is a plane cross-sectional view of the heat dissipation hole plate of the utility model.

[0018] Figure 3 The utility model Figure 1 A magnified schematic diagram of the structure in the middle.

[0019] Figure 4 It is a side plane sectional view of the installation groove of the utility model.

[0020] Figure 5 It is a top plan schematic diagram of the box body of the utility model.

[0021] Figure 6 It is a schematic diagram of the structure of the compensation module of the utility model.

[0022] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0023] 1. Box body; 101. Wiring slot; 102. Inspection cover; 103. Heat dissipation hole plate; 2. Mounting slot 1; 201. Mounting slot 2; 202. Slide slot; 203. Movable plate; 204. Tooth plate 1; 205. Tooth plate 2; 3. Rotating rod; 301. Dust shield; 302. Gear 1; 4. Driving motor; 401. Gear 2; 5. Torque module 1; 6. Torque module 2; 7. Compensation receiving module; 8. Compensation module; 9. Temperature sensor. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] Example:

[0026] As attached Figure 1 To Attachment Figure 6 As shown:

[0027] The utility model provides a permanent magnet motor torque compensation device, comprising a box body 1, wherein a torque module 1 5, a torque module 2 6, a compensation amount receiving module 7 and a compensation module 8 are respectively arranged inside the box body 1, heat dissipation hole plates 103 are respectively arranged on both sides of the box body 1, and mounting grooves 1 2 and mounting grooves 201 are respectively arranged on both sides of the heat dissipation hole plates 103, a plurality of rotating rods 3 are rotatably connected between the mounting grooves 1 2 and the mounting grooves 201, and a dust shield plate 301 is fixedly connected on one side of the plurality of rotating rods 3, one end of the plurality of rotating rods 3 extends to the inside of the mounting groove 2 and is fixedly connected with a gear 1 302, a slide groove 202 is vertically arranged inside the mounting groove 2, a movable plate 203 is slidably connected inside the slide groove 202, a tooth plate 1 204 is arranged on one side of the movable plate 203, and the tooth plate 1 204 and the gear 1 302 are meshed with each other.

[0028] Among them, a pair of driving motors 4 are installed on one side of the interior of the installation groove 2, and the output ends of the pair of driving motors 4 are fixedly connected to gear 2 401. The other side of the pair of movable plates 203 is provided with tooth plate 205, and the pair of tooth plates 205 and the pair of gear 2 401 are meshed with each other. Through the setting of the driving motor 4, it is easy to realize the rotation of gear 2 401, so as to utilize the meshing of gear 2 401 and tooth plate 205 to drive the movable plate 203 to move up and down in the slide groove 202.

[0029] A temperature sensor 9 is installed inside the box 1 , and the temperature sensor 9 is electrically connected to the drive motor 4 through a wire. The temperature sensor 9 is provided to facilitate monitoring of the temperature inside the box 1 .

[0030] Among them, the torque module 1 5, the torque module 2 6, the compensation amount receiving module 7 and the compensation module 8 are electrically connected in sequence through wires, and the driving torque of the permanent magnet motor is obtained through the torque module 1 5, and then the load torque of the permanent magnet motor is obtained according to the first speed signal of the permanent magnet motor through the torque module 2 6, and then the compensation amount is obtained according to the driving torque and the load torque through the compensation amount receiving module 7, and finally the compensation signal used to characterize the compensation amount is output to the permanent magnet motor through the compensation module 8, thereby realizing compensation of the permanent magnet motor torque.

[0031] Among them, the plurality of dust shields 301 are arranged in a close relationship from bottom to top, and the plurality of dust shields 301 are all located on one side of the heat dissipation hole plate 103 .

[0032] A wiring slot 101 is provided at the bottom end of one side of the box body 1 .

[0033] An inspection cover 102 is installed at the top of the box body 1, and the arrangement of the inspection cover 102 facilitates the inspection of the internal components of the box body 1.

[0034] The working principle of this embodiment is as follows: first, the driving torque of the permanent magnet motor is obtained through the torque module 1 5, and then the load torque of the permanent magnet motor is obtained through the torque module 2 6 according to the first speed signal of the permanent magnet motor, and then the compensation amount is obtained according to the driving torque and the load torque through the compensation amount receiving module 7, and finally the compensation signal used to characterize the compensation amount is output to the permanent magnet motor through the compensation module 8, so as to realize the compensation of the torque of the permanent magnet motor. When the torque module 1 5, the torque module 2 6, the compensation amount receiving module 7 and the compensation module 8 inside the box body 1 continue to work and cause the temperature to be too high, the drive motor 4 is controlled to start through the temperature sensor 9 to drive the gear 2 401 to rotate, and the mutual meshing of the gear 2 401 and the tooth plate 205 is used to drive the activity The plate 203 moves up and down in the slide groove 202, thereby utilizing the mutual engagement of the tooth plate 204 and the gear 1 302 to drive the rotating rod 3 to rotate, thereby realizing the flipping of the dust shield 301, so that the heat inside the box 1 can be discharged from the heat dissipation hole plate 103, so that the torque module 1 5, the torque module 2 6, the compensation amount receiving module 7 and the compensation module 8 can achieve the effect of rapid cooling, avoiding the internal component temperature from being too high, affecting normal use, reducing the compensation efficiency, and even causing malfunctions. At the same time, by resetting the dust shield 301, the heat dissipation hole plate 103 can be shielded. When the temperature of the internal components is normal, the external dust is reduced from entering the box 1 through the heat dissipation hole plate 103 to affect the normal use of the internal components.

[0035] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

Claims

1. A permanent magnet motor torque compensation device, comprising a housing (1), characterized in that: The box body (1) is provided with a torque module 1 (5), a torque module 2 (6), a compensation receiving module (7) and a compensation module (8) respectively. Heat dissipation holes (103) are provided on both sides of the box body (1). A mounting groove 1 (2) and a mounting groove 2 (201) are provided on both sides of the heat dissipation hole plate (103). A plurality of rotating rods (3) are rotatably connected between the mounting groove 1 (2) and the mounting groove 2 (201). One side of each of the plurality of rotating rods (3) is fixedly connected with a dust shield plate (301). One end of each of the plurality of rotating rods (3) extends into the interior of the mounting groove 1 (2) and is fixedly connected with a gear 1 (302). A slide groove (202) is vertically provided inside the mounting groove 1 (2). A movable plate (203) is slidably connected inside the slide groove (202). A tooth plate 1 (204) is provided on one side of the movable plate (203). The tooth plate 1 (204) and the gear 1 (302) are meshed with each other.

2. The permanent magnet motor torque compensation device according to claim 1, characterized in that: A pair of drive motors (4) are installed on one side of the interior of the installation groove (2), and the output ends of the pair of drive motors (4) are fixedly connected to gears (401). The other side of the pair of movable plates (203) is provided with toothed plates (205), and the pair of toothed plates (205) and the pair of gears (401) are meshed with each other.

3. The permanent magnet motor torque compensation device according to claim 2, characterized in that: A temperature sensor (9) is installed inside the box (1), and the temperature sensor (9) is electrically connected to the drive motor (4) via a wire.

4. The permanent magnet motor torque compensation device according to claim 1, characterized in that: The torque module 1 (5), the torque module 2 (6), the compensation amount receiving module (7) and the compensation module (8) are electrically connected in sequence via wires.

5. The permanent magnet motor torque compensation device according to claim 1, characterized in that: The plurality of dust shields (301) are arranged in close proximity from bottom to top, and the plurality of dust shields (301) are all located on one side of the heat dissipation hole plate (103).

6. The permanent magnet motor torque compensation device according to claim 1, characterized in that: A wiring slot (101) is provided at the bottom end of one side of the box body (1).

7. The permanent magnet motor torque compensation device according to claim 1, characterized in that: An inspection cover (102) is installed on the top of the box body (1).

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