CN113949228A

CN113949228A - Wound induction type asynchronous motor structure and using method thereof

Info

Publication number: CN113949228A
Application number: CN202111390207.0A
Authority: CN
Inventors: 卢承领; 许雪莹; 程超; 鲍逸国; 崔嘉欣; 何雨欣; 程乐; 夏林
Original assignee: West Anhui University
Current assignee: West Anhui University
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-01-18

Abstract

The invention relates to the field of asynchronous motors, in particular to a wound induction type asynchronous motor structure and a using method thereof, wherein the wound induction type asynchronous motor structure comprises a motor shell, a heat dissipation connecting ring, a motor tail cover, a motor front cover, a bearing and the like; two heat dissipation connecting rings are fixedly connected to the motor shell, a motor tail cover is fixedly connected to the heat dissipation connecting ring on the right side, a motor front cover is fixedly connected to the heat dissipation connecting ring on the left side, and a bearing is arranged in the center of the motor front cover. The resistance on the rotating guide rod can be increased through the action of the external resistance block, so that the resistance is larger when the starting device is started, the starting current is further reduced, the torque of the rotating guide rod is higher, and the starting torque of the device is effectively improved.

Description

Wound induction type asynchronous motor structure and using method thereof

Technical Field

The invention relates to the field of asynchronous motors, in particular to a wound induction type asynchronous motor structure and a using method thereof.

Background

The rotor in the asynchronous motor is a rotatable conductor, the stator is a non-rotatable part in the motor, the asynchronous motor places the rotor in a rotating magnetic field generated by the stator, and generates electromagnetic torque to rotate the rotor under the action of the rotating magnetic field and induced current in a rotor winding, so that the electromechanical energy is converted into mechanical energy, the induced current is gradually reduced when the rotating speed of the rotor is gradually close to the synchronous rotating speed, the generated electromagnetic torque is correspondingly reduced, and when the asynchronous motor works in a motor state, the rotating speed of the rotor is less than the synchronous rotating speed.

When the existing winding type induction motor normally operates, the starting torque of the asynchronous motor is not large, the requirement of starting with a load is difficult to meet, in order to improve the starting torque, the existing mode is to improve the power capacity of the motor, a large amount of electricity is wasted in low-load operation, the other mode is to reduce the starting current by adopting voltage reduction starting, but a voltage reduction device is needed to be added, a large amount of investment is needed in both solving modes, the economic cost is overhigh, and sparks can be generated between an electric brush and a collecting ring due to friction, so the traditional winding type induction motor cannot be used in places with explosion-proof requirements such as mines, underground wells, petroleum and the like, and the application range of the winding type induction motor is limited.

Disclosure of Invention

Therefore, it is necessary to provide a structure of a wound-rotor induction asynchronous motor and a method of using the same, which can effectively improve the starting torque of the wound-rotor induction motor, prevent sparks generated due to an excessively high temperature between the brush and the collector ring, dissipate heat from the inside of the device, and prevent burnout during a short-time overload load.

In view of the above, the present invention provides a wound-rotor induction asynchronous motor structure, which comprises a motor housing, two heat-dissipating connecting rings, a motor tail cover, a motor front cover, a bearing, an output shaft, a small cover plate, a large cover plate, a filter screen, an electromagnetic induction component, a starting moment-increasing component and a sliding component, wherein the motor housing is fixedly connected with the two heat-dissipating connecting rings, the motor tail cover is fixedly connected to the heat-dissipating connecting ring on the right side, the motor front cover is fixedly connected to the heat-dissipating connecting ring on the left side, the bearing is arranged in the center of the motor front cover, the output shaft is fixedly connected in the bearing, the small cover plate is connected to the top of the motor tail cover in a clamping and pressing manner, the large cover plate is connected to the top of the motor housing in a clamping and pressing manner, the three filter screens are all arranged on the motor tail cover, the electromagnetic induction component is arranged in the motor housing, the starting moment-increasing component is fixedly installed at the bottom of the motor tail cover, the sliding assembly is arranged on the starting moment-increasing assembly.

The improvement of above-mentioned scheme, the electromagnetic induction subassembly is including stator silicon steel sheet, stator coil, the rotation guide arm, arc coil one, arc coil two, rotor coil and rotor silicon steel sheet, be provided with multi-disc stator silicon steel sheet in the motor housing, stator coil has wound in the stator silicon steel sheet, the rigid coupling has the rotation guide arm on the output shaft, it is connected with motor tail shroud rotary type to rotate the guide arm, the rigid coupling has arc coil one on the rotation guide arm, the same rigid coupling of arc coil two is on rotating the guide arm, be connected with rotor coil on arc coil one and the arc coil two jointly, be provided with multi-disc rotor silicon steel sheet on the rotation guide arm, rotor coil winds on rotor silicon steel sheet.

As the improvement of above-mentioned scheme, starting increase square subassembly is including speed sensor, the insulating ring, the collecting ring, rectangle slotted frame, wedge insulation cover, compression spring and brush, fixed mounting has speed sensor on the rotation guide arm, be connected with the insulating ring through interference fit's mode on the rotation guide arm, the rigid coupling has three collecting ring on the insulating ring, bottom fixedly connected with three pairs of rectangle slotted frame in the motor tail shroud, sliding connection has two wedge insulation cover on the rectangle slotted frame, common rigid coupling has the brush on two wedge insulation cover of same level, adjacent brush closely laminates with the collecting ring, be connected with compression spring between wedge insulation cover and the rectangle slotted frame.

As the improvement of above-mentioned scheme, the slip subassembly is including the fluting mount, electric putter, L type pushing frame, T type pushing frame and reset spring, fixedly connected with fluting mount on two left rectangle fluting mounts, fixed mounting has electric putter on the fluting mount, the welding of electric putter telescopic shaft one end has L type pushing frame, homonymy L type pushing frame and fluting mount sliding connection, sliding connection has three T type pushing frame on the fluting mount, T type pushing frame contacts with two adjacent wedge insulation cover, be connected with two pairs of reset spring between T type pushing frame and the fluting mount.

As the improvement of the scheme, the device also comprises a limiting ring, wherein two limiting rings are fixedly connected to the rotating guide rod, and the two limiting rings are both contacted with the insulating ring.

As the improvement of above-mentioned scheme, still including promoting radiator unit, promote radiator unit symmetry and set up on little apron, promote radiator unit and be located motor tail shroud, promote radiator unit including rectangle heating panel and wedge push frame, the symmetry rigid coupling has the rectangle heating panel on the little apron, the rigid coupling has wedge push frame on the rectangle heating panel, homonymy L type push frame and wedge push frame contact.

As an improvement of the scheme, the heat radiation device further comprises a heat radiation fan, wherein the heat radiation fan is fixedly connected to the rotating guide rod and is positioned in the left heat radiation connecting ring.

As the improvement of the scheme, the variable resistance speed regulation device further comprises a variable resistance speed regulation component, the variable resistance speed regulation component is arranged at the top in the motor shell and comprises a wiring board, wiring terminals, connecting steel sheets and variable resistance blocks, the wiring board is arranged at the upper portion in the motor shell, three pairs of wiring terminals are arranged on the wiring board, the connecting steel sheets are fixedly connected to the wiring terminals together, the three variable resistance blocks are fixedly connected to the top surface of the wiring board, and the connecting steel sheets penetrate through the adjacent variable resistance blocks.

As an improvement of the scheme, the variable resistance block further comprises a current sensor, and the current sensor is connected between every two adjacent variable resistance blocks.

As an improvement of the scheme, the use method of the winding type induction asynchronous motor structure comprises the following working steps:

s1: starting the equipment: the external wire is used for electrifying the electromagnetic induction component, and the resistance of the electromagnetic induction component is increased under the action of the starting moment-increasing component, so that the electromagnetic induction component has larger resistance during starting, further the starting current is reduced, and the torque of the electromagnetic induction component is higher;

s2: adjusting the rotating speed: the resistance variable speed regulating assembly can increase or decrease the resistance of the electromagnetic induction assembly according to the requirement, so that the current of the electromagnetic induction assembly is reduced or increased, and further, the rotating magnetic field generated by the stator in the electromagnetic induction assembly is reduced or increased, so that the rotating speed of the electromagnetic induction assembly is reduced or increased;

s3: and (3) heat dissipation of the components: when the starting moment-increasing component operates in the step S1, external wind flow enters the motor tail cover through the filter screen to dissipate heat of the starting moment-increasing component;

s4: internal heat dissipation: in step S1, the electromagnetic induction component operates while driving the cooling fan to rotate, the cooling fan delivers the airflow to the electromagnetic induction component and takes away the heat on the electromagnetic induction component, and then the airflow is output through the air outlet at the top of the motor tail cover;

s5: and (3) reducing the torque: when the torque of the electromagnetic induction assembly exceeds the preset value of the starting moment-increasing assembly, the starting moment-increasing assembly controls the sliding assembly to operate, so that the resistance of the electromagnetic induction assembly is reduced, the current is increased, and the torque of the electromagnetic induction assembly is reduced;

s6: top ventilation: when the sliding component operates, the sliding component drives the heat dissipation component to operate, so that the small cover plate opens the air outlet at the top of the motor tail cover, and heat generated by operation of parts in the equipment is dissipated through the top of the motor tail cover, thereby achieving the purpose of heat dissipation;

s7: avoid burning out equipment: when the current sensor detects that the current in the variable resistance speed regulation assembly is too large and the rotating speed is too high, the current sensor can control the sliding assembly to reversely operate, so that the resistance of the electromagnetic induction assembly is increased and the current is reduced, the rotating speed of the electromagnetic induction assembly is reduced, and the phenomenon that the rotating guide rod stops rotating to burn out equipment when the short-time overload load is carried out is avoided.

Compared with the prior art, the invention has the following advantages:

1. the resistance on the rotating guide rod can be increased through the action of the external resistance block, so that the resistance is larger when the starting device is started, the starting current is further reduced, the torque of the rotating guide rod is higher, and the starting torque of the device is effectively improved.

2. Because outside air can get into in the motor tail shroud through the filter screen, cold air can take away the heat on brush and the collecting ring, reaches the effect of carrying out the heat dissipation to brush and collecting ring, avoids the high spark that produces of temperature between brush and the collecting ring to increase wound-rotor induction motor range of application.

3. Through the arranged cooling fan, the cooling fan can convey the air flow to the rotor silicon steel sheet and the device on the rotor silicon steel sheet, so that the heat on the rotor silicon steel sheet and the device on the rotor silicon steel sheet is taken away, the purpose of cooling the rotor silicon steel sheet and the device on the rotor silicon steel sheet is achieved, and the overhigh temperature when internal parts of equipment operate is avoided.

4. Through the action of the variable resistance block, the variable resistance block can change the current in the stator winding coil, so that the rotating magnetic field generated by the stator winding coil is increased or reduced, and the rotating speed of the rotating guide rod is increased or reduced.

5. Through the current sensor, the current sensor can control the electric push rod to extend when detecting that the current in the variable resistance block is too large and the rotating speed is too high, so that the rotating speed of the rotating guide rod and the device on the rotating guide rod is reduced, and the device is prevented from being burnt out due to the fact that the rotating guide rod stops rotating when the short-time overload load is carried out.

Drawings

Fig. 1 is a schematic sectional perspective view of the present invention.

Fig. 2 is a schematic perspective view of a first embodiment of the present invention.

Fig. 3 is a schematic perspective view of a second embodiment of the present invention.

Fig. 4 is a schematic diagram of a partially cut-away perspective structure of the electromagnetic induction assembly of the present invention.

Fig. 5 is a partially disassembled three-dimensional structure diagram of the electromagnetic induction component of the invention.

Fig. 6 is a schematic sectional perspective view of a heat dissipation assembly of the present invention.

Fig. 7 is a schematic view of a partial sectional perspective structure of the starting moment-increasing assembly of the invention.

Fig. 8 is a schematic view of a first partially-separated body structure of the starting moment-increasing assembly of the invention.

Fig. 9 is a schematic view of a second partially-separated body structure of the starting moment-increasing assembly of the invention.

Fig. 10 is a perspective view of the sliding assembly of the present invention.

Fig. 11 is a schematic view of a partial sectional perspective structure of the variable resistance speed regulating assembly of the present invention.

Fig. 12 is a schematic perspective view of the resistance-variable speed regulating assembly of the present invention.

Number designation in the figures: 1. motor shell, 21, heat radiation connecting ring, 22, motor tail cover, 23, motor front cover, 24, bearing, 25, output shaft, 26, small cover plate, 27, large cover plate, 28, filter screen, 3, electromagnetic induction component, 31, stator silicon steel sheet, 32, stator winding coil, 33, rotation guide rod, 34, arc winding coil I, 35, arc winding coil II, 36, rotor winding coil, 37, rotor silicon steel sheet, 4, starting moment-increasing component, 41, speed sensor, 42, insulating ring, 43, collecting ring, 44, rectangular slotted frame, 45, wedge-shaped insulating sleeve, 46, compression spring, 47, electric brush, 5, sliding component, 51, slotted fixing frame, 52, electric push rod, 53, L-shaped push frame, 54, T-shaped push frame, 55, reset spring, 50, limiting ring, 6, pushing heat radiation component, 61, rectangular heat radiation plate, 62, wedge-shaped push frame, 7. the variable-resistance speed regulation device comprises a cooling fan 8, a variable-resistance speed regulation component 81, a wiring board 82, wiring terminals 83, connecting steel sheets 84, a variable-resistance block 9 and a current sensor.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Example 1

A wound induction asynchronous motor structure and a using method thereof are disclosed, as shown in figures 1-11, comprising a motor housing 1, a heat dissipation connecting ring 21, a motor tail cover 22, a motor front cover 23, a bearing 24, an output shaft 25, a small cover plate 26, a large cover plate 27, a filter screen 28, an electromagnetic induction component 3, a starting moment-increasing component 4 and a sliding component 5, wherein the motor housing 1 is fixedly connected with two heat dissipation connecting rings 21 for heat dissipation, the heat dissipation connecting ring 21 on the right side is fixedly connected with the motor tail cover 22, the heat dissipation connecting ring 21 on the left side is fixedly connected with the motor front cover 23, the center of the motor front cover 23 is provided with the bearing 24, the output shaft 25 is fixedly connected in the bearing 24, the small cover plate 26 is connected on the top of the motor tail cover 22 in a clamping and pressing manner, the large cover plate 27 is connected on the top of the motor housing 1, and three filter screens 28 are all fixedly connected on the motor tail cover 22, the filter screen 28 is used for filtering the air, the electromagnetic induction component 3 is arranged in the motor shell 1, the electromagnetic induction component 3 is used for operating under the action of induced current, the starting moment-increasing component 4 is fixedly arranged at the bottom in the motor tail cover 22, the starting moment-increasing component 4 is used for reducing current and increasing torque when starting, and the sliding component 5 is arranged on the starting moment-increasing component 4.

The electromagnetic induction assembly 3 comprises a stator silicon steel sheet 31, a stator winding coil 32, a rotating guide rod 33, an arc winding coil I34, an arc winding coil II 35, a rotor winding coil 36 and a rotor silicon steel sheet 37, a plurality of stator silicon steel sheets 31 are arranged in the motor shell 1, a stator winding coil 32 is wound in each stator silicon steel sheet 31, a rotating guide rod 33 used for conducting electricity is fixedly connected to the output shaft 25, the rotating guide rod 33 is rotatably connected with the motor tail cover 22, a first arc winding coil 34 is fixedly connected to the rotating guide rod 33, a second arc winding coil 35 is fixedly connected to the rotating guide rod 33, the first arc winding coil 34 and the second arc winding coil 35 are used for transmitting current to the rotating guide rod 33, a rotor winding coil 36 is jointly connected to the first arc winding coil 34 and the second arc winding coil 35, a plurality of rotor silicon steel sheets 37 are arranged on the rotating guide rod 33, and the rotor winding coil 36 is wound on the rotor silicon steel sheets 37.

The starting torque-increasing assembly 4 comprises a speed sensor 41, an insulating ring 42, a collecting ring 43, a rectangular slotted frame 44, a wedge-shaped insulating sleeve 45, a compression spring 46 and an electric brush 47, wherein the speed sensor 41 is fixedly installed on the rotating guide rod 33, the speed sensor 41 is used for detecting the rotating speed of the rotating guide rod 33, the insulating ring 42 is connected to the rotating guide rod 33 in an interference fit mode, three collecting rings 43 are fixedly connected to the insulating ring 42, the collecting rings 43 are used for collecting current, three pairs of rectangular slotted frames 44 are fixedly connected to the inner bottom of the motor tail cover 22, two wedge-shaped insulating sleeves 45 are slidably connected to the rectangular slotted frame 44, the electric brushes 47 are fixedly connected to two wedge-shaped insulating sleeves 45 on the same level together, the adjacent electric brushes 47 are tightly attached to the collecting rings 43, and the compression spring 46 is connected between the wedge-shaped insulating sleeves 45 and the rectangular slotted frames 44.

The sliding assembly 5 comprises a slotted fixing frame 51, an electric push rod 52, an L-shaped pushing frame 53, a T-shaped pushing frame 54 and a return spring 55, the slotted fixing frame 51 is fixedly connected to the two leftmost rectangular slotted frames 44, the electric push rod 52 for telescopic driving is fixedly mounted on the slotted fixing frame 51, the L-shaped pushing frame 53 is welded at one end of a telescopic shaft of the electric push rod 52, the L-shaped pushing frame 53 is connected with the slotted fixing frame 51 in a sliding manner, the slotted fixing frame 51 is connected with the three T-shaped pushing frames 54 in a sliding manner, the T-shaped pushing frames 54 are in contact with the two adjacent wedge-shaped insulating sleeves 45, the T-shaped pushing frames 54 are used for pushing the wedge-shaped insulating sleeves 45 and the electric brushes 47 to move relatively, and two pairs of return springs 55 are connected between the T-shaped pushing frames 54 and the slotted fixing frame 51.

The brush 47 is connected with the external resistance block through the small cover plate 26, resistance values with different sizes are connected according to requirements, the stator winding coil 32 is connected with an external electric wire through the large cover plate 27, when the device needs to be started when the device normally operates, the external electric wire energizes the stator winding coil 32, so that a rotating magnetic field generated by the stator winding coil 32 is enabled, as the rotor silicon steel sheet 37 is positioned in the rotating magnetic field and interacts with induced current in the rotor winding coil 36, electromagnetic torque is generated on the rotor silicon steel sheet 37 and a device thereon, the rotor silicon steel sheet 37 can drive the rotating guide rod 33 to rotate, the arc winding coil one 34 and the arc winding coil two 35 can transmit current to the rotating guide rod 33, the current on the rotating guide rod 33 can be transmitted to the insulating ring 42, the current is gathered and then transmitted to the brush 47 by the collecting ring 43, and the resistance on the rotating guide rod 33 is increased through the action of the external resistance block, thereby having a greater resistance at start-up and thus reducing the starting current, resulting in a higher torque to turn the guide 33.

Speed sensor 41 is used for detecting the slew velocity of rotating guide 33, when speed sensor 41 detects that slew velocity of rotating guide 33 is slower and does not reach the preset value, speed sensor 41 can control electric putter 52 to shrink according to the preset value, electric putter 52 shrinks and drives L type promotion frame 53 towards the motion of being close to motor front shroud 23 direction, thereby L type promotion frame 53 can promote T type promotion frame 54 and move in opposite directions, and then T type promotion frame 54 can promote wedge insulating boot 45 and brush 47 relative motion, make brush 47 and slip ring 43 separation, slip ring 43 no longer transmits the electric current to brush 47 in, make resistance on the rotating guide 33 reduce and the electric current increase, make the torque of rotating guide 33 reduce.

When the rotating guide rod 33 and the device thereon rotate, the electric brush 47 is tightly attached to the collecting ring 43 to generate sparks due to overhigh friction temperature, external air can enter the motor tail cover 22 through the filter screen 28, and cold air takes away heat on the electric brush 47 and the collecting ring 43 to dissipate heat of the electric brush 47 and the collecting ring 43, so that sparks generated due to overhigh temperature between the electric brush 47 and the collecting ring 43 are avoided.

Example 2

On the basis of embodiment 1, as shown in fig. 8, the device further includes a limiting ring 50, two limiting rings 50 are fixedly connected to the rotating guide rod 33, the limiting rings 50 are used for limiting the insulating ring 42, and both the limiting rings 50 are in contact with the insulating ring 42.

The limiting ring 50 can limit the position of the insulating ring 42, and the insulating ring 42 is prevented from being deviated in the rotating process.

Example 3

On the basis of embodiment 1, as shown in fig. 6, still including promoting radiator unit 6, promote radiator unit 6 symmetry and set up on little apron 26, promote radiator unit 6 and be used for making the heat that the inside spare part operation of equipment produced to discharge, promote radiator unit 6 and be located motor tail shroud 22, promote radiator unit 6 including rectangle heating panel 61 and wedge push frame 62, the symmetry rigid coupling has rectangle heating panel 61 on little apron 26, rectangle heating panel 61 is used for making the inside heat of equipment to discharge, the rigid coupling has wedge push frame 62 on the rectangle heating panel 61, homonymy L type push frame 53 and wedge push frame 62 contact.

When the L-shaped pushing frame 53 moves towards the direction close to the front motor cover 23, the L-shaped pushing frame 53 pushes the wedge-shaped pushing frame 62 and the upper device to move upwards, so that the small cover plate 26 opens the air outlet at the top of the rear motor cover 22, and heat generated by the operation of the internal parts of the equipment is dissipated through the top of the rear motor cover 22, thereby achieving the purpose of heat dissipation and avoiding overhigh temperature when the internal parts of the equipment operate.

Example 4

Based on embodiment 1, as shown in fig. 1, the cooling fan 7 is further included, the cooling fan 7 is fixedly connected to the rotating guide rod 33, the cooling fan 7 is used for conveying the wind flow to the rotor silicon steel sheet 37 and the device thereon, and the cooling fan 7 is located in the left side cooling connection ring 21.

The rotating guide rod 33 can drive the cooling fan 7 to rotate, the cooling fan 7 conveys the air flow to the rotor silicon steel sheet 37 and the device on the rotor silicon steel sheet 37, the heat on the rotor silicon steel sheet 37 and the device on the rotor silicon steel sheet is taken away, and then the air flow is output through an air outlet at the top of the motor tail cover 22, so that the purpose of cooling the rotor silicon steel sheet 37 and the device on the rotor silicon steel sheet is achieved.

Example 5

On the basis of embodiment 1, as shown in fig. 11 to 12, the variable resistance speed regulation device further includes a variable resistance speed regulation component 8, the variable resistance speed regulation component 8 is disposed at the top inside the motor housing 1, the variable resistance speed regulation component 8 is used for changing the rotation speed of the rotating guide rod 33, the variable resistance speed regulation component 8 includes a wiring board 81, terminals 82, connecting steel sheets 83 and variable resistance blocks 84, the wiring board 81 is disposed at the upper inside the motor housing 1, three pairs of terminals 82 are fixedly connected to the wiring board 81, the terminals 82 are used for connecting external electric wires, the connecting steel sheets 83 are fixedly connected to the pairs of terminals 82, three variable resistance blocks 84 are fixedly connected to the top surface of the wiring board 81, the connecting steel sheets 83 penetrate through the adjacent variable resistance blocks 84, and the variable resistance blocks 84 are used for changing the current in the stator winding 32.

The terminal plate 81 is electrically connected to the stator winding 32, the terminal 82 is connected to an external electric wire, the external electric wire transmits a current to the stator winding 32 through the terminal 82, the varistor block 84 and the connecting steel sheet 83, and the current in the stator winding 32 can be changed by the varistor block 84, so that the rotating magnetic field generated by the stator winding 32 is increased or decreased, and the rotation speed of the rotating guide rod 33 is increased or decreased.

Example 6

In addition to embodiment 5, as shown in fig. 12, the present invention further includes a current sensor 9, the current sensor 9 is connected between two adjacent varistor blocks 84, and the current sensor 9 is configured to detect a current in the varistor block 84.

Current sensor 9 is capable of sensing the current in varistor block 84, and when current sensor 9 senses excessive current in varistor block 84 and excessive speed, the current sensor 9 will control the electric push rod 52 to extend, the electric push rod 52 extends to drive the L-shaped push frame 53 to move away from the front cover 23 of the motor, the L-shaped pushing frame 53 is separated from the T-shaped pushing frame 54, the compressed return spring 55 is reset to drive the T-shaped pushing frame 54 to move relatively, the T-shaped pushing frame 54 is separated from the wedge-shaped insulating sleeve 45, the compression spring 46 in a compressed state is reset to drive the wedge-shaped insulating sleeve 45 and the electric brush 47 to move oppositely, the electric brush 47 is contacted with the collecting ring 43, so that the current in the collecting ring 43 and the device on the collecting ring is reduced, the rotational speed of the rotating link 33 and the devices thereon is reduced, thereby avoiding the possibility of the rotating link 33 stalling and burning out the equipment in the event of a short overload.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A winding type induction asynchronous motor structure, characterized in that it comprises a motor housing (1), a heat dissipation connecting ring (21), a motor tail cover (22), a motor front cover (23), a bearing ( 24), the output shaft (25), the small cover plate (26), the large cover plate (27), the filter screen (28), the electromagnetic induction assembly (3), the starting torque increasing assembly (4) and the sliding assembly (5), Two heat dissipation connecting rings (21) are fixedly connected to the motor casing (1), a motor tail cover (22) is fixedly connected to the heat dissipation connecting ring (21) on the right side, and a heat dissipation connecting ring (21) is fixed to the left side. A motor front cover (23) is connected, a bearing (24) is arranged in the center of the motor front cover (23), an output shaft (25) is fixedly connected in the bearing (24), and the top of the motor tail cover (22) is clamped A small cover plate (26) is connected, a large cover plate (27) is connected to the top of the motor casing (1) by pressing, and the three filter screens (28) are all arranged on the motor tail cover (22). ) is provided with an electromagnetic induction assembly (3), a starting torque increasing assembly (4) is fixedly installed at the inner bottom of the motor tail cover (22), and the sliding assembly (5) is arranged on the starting torque increasing assembly (4).

2. The structure of a wound induction asynchronous motor according to claim 1, wherein the electromagnetic induction assembly (3) comprises a stator silicon steel sheet (31), a stator winding coil (32), a rotating guide rod ( 33), the first arc winding coil (34), the second arc winding coil (35), the rotor winding coil (36) and the rotor silicon steel sheet (37), and a plurality of stator silicon steel sheets (31) are arranged in the motor casing (1). ), a stator coil (32) is wound inside the stator silicon steel sheet (31), a rotating guide rod (33) is fixed on the output shaft (25), and the rotating guide rod (33) and the motor tail cover (22) are rotated. Connect, the rotating guide rod (33) is fixed with an arc-shaped winding coil one (34), and the arc-shaped winding coil two (35) is also fixed on the rotating guide rod (33), and the arc-shaped winding coil one (34) is connected with A rotor winding coil (36) is commonly connected to the arc-shaped winding coil two (35), a plurality of rotor silicon steel sheets (37) are arranged on the rotating guide rod (33), and the rotor winding coil (36) is wound around the rotor silicon steel sheet (37). )superior.

3. The structure of a wound induction asynchronous motor according to claim 1, wherein the starting torque increasing assembly (4) comprises a speed sensor (41), an insulating ring (42), a collector ring (43) ), a rectangular slotted frame (44), a wedge-shaped insulating sleeve (45), a compression spring (46) and a brush (47), a speed sensor (41) is fixedly installed on the rotating guide rod (33), and the rotating guide rod (33 ) is connected with an insulating ring (42) by means of interference fit, three collector rings (43) are fixedly connected to the insulating ring (42), and three pairs of rectangular slotted frames are fixedly connected to the inner bottom of the motor tail cover (22). (44), the rectangular slotted frame (44) is slidably connected with two wedge-shaped insulating sleeves (45), and the two wedge-shaped insulating sleeves (45) at the same level are jointly fixed with brushes (47), and adjacent The brushes (47) are in close contact with the collector rings (43), and a compression spring (46) is connected between the wedge-shaped insulating sleeve (45) and the rectangular slotted frame (44).

4. The structure of a wound induction asynchronous motor according to claim 3, wherein the sliding assembly (5) comprises a slotted fixing frame (51), an electric push rod (52), an L-shaped push frame (53), T-shaped push frame (54) and return spring (55), the two leftmost rectangular slotted frames (44) are fixedly connected with a slotted fixing frame (51), and the slotted fixing frame (51) An electric push rod (52) is fixedly installed on the upper part, and an L-shaped push frame (53) is welded on one end of the telescopic shaft of the electric push rod (52). , the slotted fixing frame (51) is slidably connected with three T-shaped push frames (54), the T-shaped push frames (54) are in contact with two adjacent wedge-shaped insulating sleeves (45), and the T-shaped push frames (54) Two pairs of return springs (55) are connected with the slotted fixing frame (51).

5. The structure of a wound induction asynchronous motor according to claim 2, characterized in that it further comprises a limit ring (50), and two limit rings (50) are fixed on the rotating guide rod (33). ), both limit rings (50) are in contact with the insulating ring (42).

6. The structure of a wound induction asynchronous motor according to claim 1, characterized in that it further comprises a push radiator assembly (6), and the push radiator assembly (6) is symmetrically arranged on the small cover plate (26) , the push heat dissipation assembly (6) is located in the motor tail cover (22), the push heat dissipation assembly (6) includes a rectangular heat dissipation plate (61) and a wedge-shaped push frame (62), and the small cover plate (26) is symmetrically fixed with A rectangular heat dissipation plate (61) is fixed on the rectangular heat dissipation plate (61) with a wedge-shaped push frame (62), and the L-shaped push frame (53) on the same side is in contact with the wedge-shaped push frame (62).

7. The structure of a wound induction asynchronous motor according to claim 2, characterized in that it further comprises a cooling fan (7), and a cooling fan (7) is fixedly connected to the rotating guide rod (33) to dissipate heat. The fan (7) is located in the left heat dissipation connecting ring (21).

8. The structure of a wound induction asynchronous motor according to claim 1, characterized in that it further comprises a variable resistance speed control assembly (8), and a variable resistance speed control assembly is provided on the inner top of the motor casing (1). (8), the variable resistance speed regulating assembly (8) includes a terminal board (81), a terminal post (82), a connecting steel sheet (83) and a variable resistance block (84), and the inner upper part of the motor casing (1) is provided with a A wiring board (81), three pairs of wiring posts (82) are arranged on the wiring board (81), connecting steel sheets (83) are fixedly connected to the same pair of wiring posts (82), and three pairs of wiring posts (82) are fixedly connected on the top surface of the wiring board (81). A variable resistance block (84) is connected, and the connecting steel sheet (83) passes through the adjacent variable resistance block (84).

9 . The structure of a wound induction asynchronous motor according to claim 8 , further comprising a current sensor ( 9 ), and a current sensor is connected between two adjacent variable resistance blocks ( 84 ). 10 . (9).

10. A method of using a wound induction type asynchronous motor structure, characterized in that it comprises the following working steps:

S1: Equipment starting: The electromagnetic induction component (3) is energized by the external wire, and the resistance of the electromagnetic induction component (3) is increased by the action of the starting torque increasing component (4), so that it has a larger resistance during starting, thereby reducing the starting time. current, so that the torque of the electromagnetic induction component (3) is higher;

S2: Adjusting the rotational speed: the varistor speed regulating component (8) can increase or decrease the resistance of the electromagnetic induction component (3) as required, so as to reduce or increase the current of the electromagnetic induction component (3), thereby making the electromagnetic induction component ( 3) The rotating magnetic field generated by the stator decreases or increases, thereby reducing or increasing the rotational speed of the electromagnetic induction component (3);

S3: Component heat dissipation: when the starting torque increasing assembly (4) operates in step S1, the external air flow will enter the motor tail cover (22) through the filter screen (28) to dissipate heat from the starting torque increasing assembly (4);

S4: Internal heat dissipation: in step S1, when the electromagnetic induction component (3) operates, the cooling fan (7) is driven to rotate, and the cooling fan (7) transmits the air flow to the electromagnetic induction component (3) and takes away the heat on it. , and then the air flow will be output through the air outlet at the top of the motor tail cover (22);

S5: reduce torque: when the torque of the electromagnetic induction component (3) exceeds the preset value of the starting torque increasing component (4), the starting torque increasing component (4) will control the sliding component (5) to operate, so that the electromagnetic induction component (3) The resistance decreases and the current increases, which reduces its torque;

S6: Top ventilation: when the sliding component (5) is running, it will drive and push the heat dissipation component (6) to operate, so that the small cover (26) opens the air outlet on the top of the motor tail cover (22), so that the components inside the equipment operate. The heat generated by the motor will be dissipated through the top of the motor tail cover (22), so as to achieve the purpose of heat dissipation;

S7: Avoid burning the equipment: when the current sensor (9) detects that the current in the varistor speed control assembly (8) is too large and the rotation speed is too high, the current sensor (9) will control the sliding assembly (5) to operate in reverse, so that the electric The resistance of the magnetic induction component (3) increases and the current decreases, so that the rotational speed of the magnetic induction component (3) decreases, so as to prevent the rotating guide rod (33) from stopping and burning the equipment when the load is overloaded for a short time.