A squirrel-cage outer-rotor induction motor

Abstract

The present invention discloses a squirrel-cage outer-rotor induction motor, which includes a bearing bracket, an upper baffle and a lower baffle, and a stator. A coil bracket is arranged inside the stator, and a coil skeleton is arranged on the coil bracket. A fastening device connecting the two is arranged between the upper baffle and the lower baffle. Radially distributed channels are arranged on the inner side of the stator on the stator. The stator and the coil skeleton arranged between the upper baffle and the lower baffle complete the entire magnetic field circuit. Alternating current passes through electrically on one side, forming a unilateral magnetic field. Since there is a time difference in the alternating current, a driving force will be generated, achieving an energy-saving effect. Two coils are sleeved in sequence, a permanent magnet rotor is added in the center, and it can rotate and work after being powered by 220V alternating current. Since the permanent magnet rotor is detachably connected to the bearing bracket, it is relatively easy in terms of installation and later maintenance and replacement, and the replacement cost is low.

Description

Technical Field

[0001] The present invention relates to a squirrel-cage outer-rotor induction motor, and more particularly to a squirrel-cage outer-rotor induction motor with a compact structure, convenient manufacturing and easy teaching. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil (i.e., a stator winding) to generate a rotating magnetic field and acts on a rotor (such as a squirrel-cage closed aluminum frame) to form a magneto-electric dynamic rotating torque. Motors are divided into DC motors and AC motors according to the different power supplies used. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the rotational speed of the stator magnetic field of the motor does not remain synchronous with the rotational speed of the rotor). A motor mainly consists of a stator and a rotor. The direction of the force on the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (magnetic field direction). The working principle of the motor is the action of the magnetic field on the current, which causes the motor to rotate. Currently, traditional teaching motors have a relatively complex structure, a large amount of silicon steel sheet used, and large magnetic circuit losses. How to overcome the above problems is the problem that the present invention needs to solve. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a squirrel-cage outer-rotor induction motor with the characteristics of a compact structure, convenient manufacturing and easy teaching.

[0004] To solve the above technical problem, the technical solution of the present invention is: a squirrel-cage outer-rotor induction motor, the innovation of which lies in: the squirrel-cage outer-rotor induction motor includes a bearing bracket with a vertically arranged central axis, an upper baffle and a lower baffle that are symmetrically arranged up and down and pass through the bearing bracket, and a stator arranged between the upper baffle and the lower baffle. A coil bracket sleeved on the bearing bracket is arranged inside the stator. Coil skeletons that are symmetric about the central axis of the bearing bracket are arranged on the coil bracket. A fastening device that connects the two and passes through the stator is arranged between the upper baffle and the lower baffle. Grooves distributed radially along the stator are arranged on the inner side of the stator.

[0005] Preferably, the grooves are evenly distributed in a circle around the inner side of the stator.

[0006] Preferably, upper limit nuts and lower limit nuts are arranged on the bearing bracket respectively above and below the coil bracket, and the upper limit nuts and the lower limit nuts are screwed on the bearing bracket.

[0007] Preferably, the coil support is composed of a number of coil support units stacked one above the other. Each coil support unit includes a rectangular coil support body in the middle, a left connecting part and a right connecting part in the shape of a crescent at both ends of the coil support body. The coil skeleton is located on the coil support body, and the coil skeleton is located between the bearing support and the left connecting part or between the bearing support and the right connecting part.

[0008] Preferably, the widths of the left connecting part and the right connecting part are greater than the width of the coil support body, and the widths of the left connecting part and the right connecting part are less than the width at the corresponding position of the inner diameter of the stator.

[0009] Preferably, the stator is composed of a number of stator units stacked one above the other. The coil support is closely arranged inside the stator, and the stator is provided with mounting holes for the fastening device to pass through.

[0010] Preferably, the coil skeleton includes a comb-shaped vertical plate, a positioning vertical plate, and a coil located between the comb-shaped vertical plate and the positioning vertical plate.

[0011] Preferably, a number of continuously distributed groove-like structures are provided on the comb-shaped vertical plate, and the wires connected to the coil are embedded in the groove-like structures.

[0012] Preferably, upper pads and lower pads are respectively provided between the stator and the upper baffle and between the stator and the lower baffle.

[0013] Preferably, the fastening device is a fastening bolt.

[0014] The advantages of the present invention are as follows: By adopting the above structure, the entire magnetic field circuit is completed by using the stator and the coil skeleton arranged between the upper baffle and the lower baffle. The alternating current passes through one side, forming a single-sided magnetic field. Due to the time difference of the alternating current, a driving force will be generated, achieving an energy-saving effect. The coil support arranged on the bearing support is used to install the coil skeleton. During manufacturing, the stator poles are punched from silicon steel sheets, two coils are sleeved in sequence, and an N / S pole permanent magnet rotor is added in the center. After connecting to 220V alternating current, it can rotate and work. Since the permanent magnet rotor is detachably connected to the bearing support, it is relatively easy to install and maintain and replace in the later stage, and the replacement cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0016] Figure 1 It is a perspective view of a squirrel-cage outer-rotor induction motor of the present invention.

[0017] Figure 2It is the front view of a squirrel-cage outer-rotor induction motor of the present invention.

[0018] Figure 3 It is the exploded view of a squirrel-cage outer-rotor induction motor of the present invention.

[0019] In the figure: 1 - bearing bracket, 2 - upper baffle, 3 - lower baffle, 4 - stator, 41 - slot, 42 - mounting hole, 5 - coil bracket, 51 - coil bracket body, 52 - left connecting part, 53 - right connecting part, 6 - fastening device, 7 - upper limit nut, 8 - lower limit nut, 91 - comb-shaped vertical plate, 92 - positioning vertical plate, 10 - upper cushion block, 11 - lower cushion block. Specific embodiments

[0020] The squirrel-cage outer-rotor induction motor of the present invention includes a bearing bracket 1 with a vertically arranged central axis, an upper baffle 2 and a lower baffle 3 that pass through the bearing bracket and are symmetrically arranged up and down, and a stator 4 arranged between the upper baffle and the lower baffle. A coil bracket 5 sleeved on the bearing bracket is arranged inside the stator. Coil skeletons that are symmetric about the central axis of the bearing bracket are arranged on the coil bracket. A fastening device 6 that connects the two and passes through the stator is arranged between the upper baffle and the lower baffle. Slot channels 41 distributed radially along the stator are arranged on the inner side of the stator. By adopting the above structure, the entire magnetic field circuit is completed by using the stator and coil skeletons arranged between the upper baffle and the lower baffle. Alternating current passes through one side, forming a single-sided magnetic field. There is a time difference in the alternating current, which will generate a driving force, achieving an energy-saving effect. The installation of the coil skeletons is realized by using the coil bracket arranged on the bearing bracket. During manufacturing, the stator poles are made by punching silicon steel sheets, two coils are sleeved in sequence, and an N / S pole permanent magnet rotor is added in the center. It can rotate and work by applying 220V alternating current. Since the permanent magnet rotor is detachably connected to the bearing bracket, it is relatively easy in terms of installation and later maintenance and replacement, and the replacement cost is low.

[0021] In order to achieve a certain heat dissipation function, the above slot channels are evenly distributed in a circle on the inner side of the stator. In order to limit the up and down freedom of the coil bracket, upper limit nut 7 and lower limit nut 8 are arranged on the bearing bracket respectively above and below the coil bracket, and the upper limit nut and the lower limit nut are screwed on the bearing bracket. The above coil bracket is composed of a number of coil bracket units stacked up and down. The coil bracket unit includes a coil bracket body 51 in the middle in a rectangular shape, left connecting parts 52 and right connecting parts 53 in a crescent shape at both ends of the coil bracket body. The coil skeletons are arranged on the coil bracket body, and the coil skeletons are located between the bearing bracket and the left connecting part or between the bearing bracket and the right connecting part. In order to ensure the limitation of the freedom of the coil skeletons, the widths of the left connecting part and the right connecting part are greater than the width of the coil bracket body, and the widths of the left connecting part and the right connecting part are less than the width at the corresponding position of the inner diameter of the stator.

[0022] For ease of manufacture, the stator is composed of a number of stator units stacked up and down. The coil bracket is disposed closely to the inner side of the stator, and mounting holes 42 for the fastening device to pass through are provided on the stator. For ease of manufacture and installation, the coil skeleton includes a comb-tooth-shaped vertical plate 91, a positioning vertical plate 92, and coils located between the comb-tooth-shaped vertical plate and the positioning vertical plate. The coils are not shown in the figure. A number of continuously distributed groove-like structures are provided on the comb-tooth-shaped vertical plate, and the wires connected to the coils are embedded in the groove-like structures. Upper pads 10 and lower pads 11 are respectively provided between the stator and the upper baffle and between the stator and the lower baffle, and the above-mentioned fastening device is a fastening bolt.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than restrictive technical solutions. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the purpose and scope of the present technical solution should be covered within the scope of the claims of the present invention.

Claims

1. A squirrel-cage outer-rotor induction motor, characterized in that: the squirrel-cage outer-rotor induction motor includes a bearing bracket with a vertically arranged central axis, an upper baffle and a lower baffle through which the bearing bracket passes and are symmetrically arranged up and down, and a stator arranged between the upper baffle and the lower baffle. A coil bracket sleeved on the bearing bracket is arranged inside the stator. Coil skeletons symmetrically arranged left and right with respect to the central axis of the bearing bracket are arranged on the coil bracket. A fastening device connecting the two and passing through the stator is arranged between the upper baffle and the lower baffle. Grooves distributed radially along the stator are arranged on the inner side of the stator; upper limit nuts and lower limit nuts are arranged on the bearing bracket above and below the coil bracket respectively, and the upper limit nuts and the lower limit nuts are screwed on the bearing bracket; the coil bracket is composed of a number of coil bracket units stacked up and down. The coil bracket unit includes a coil bracket main body in the middle in a rectangular shape, left connecting parts and right connecting parts in a crescent shape at both ends of the coil bracket main body. The coil skeletons are arranged on the coil bracket main body, and the coil skeletons are located between the bearing bracket and the left connecting part or the bearing bracket and the right connecting part; the widths of the left connecting part and the right connecting part are greater than the width of the coil bracket main body, and the widths of the left connecting part and the right connecting part are less than the widths at the corresponding positions of the inner diameter of the stator; the coil skeleton includes a comb-tooth-shaped vertical plate, a positioning vertical plate, and a coil located between the comb-tooth-shaped vertical plate and the positioning vertical plate; a number of continuously distributed groove-like structures are arranged on the comb-tooth-shaped vertical plate, and the wires connected to the coil are embedded in the groove-like structures.

2. The squirrel-cage outer-rotor induction motor according to claim 1, characterized in that: the grooves are evenly distributed in a circle around the inner side of the stator.

3. The squirrel-cage outer-rotor induction motor according to claim 1, characterized in that: the stator is composed of a number of stator units stacked up and down, the coil bracket is arranged closely against the inner side of the stator, and mounting holes for the fastening device to pass through are arranged on the stator.

4. The squirrel-cage outer-rotor induction motor according to claim 1, characterized in that: upper cushion blocks and lower cushion blocks are respectively arranged between the stator and the upper baffle and between the stator and the lower baffle.

5. The squirrel-cage outer-rotor induction motor according to claim 1, characterized in that: the fastening device is a fastening bolt.

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