CN114928224A - Multipurpose three-phase asynchronous motor - Google Patents
Multipurpose three-phase asynchronous motor Download PDFInfo
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- CN114928224A CN114928224A CN202210594011.1A CN202210594011A CN114928224A CN 114928224 A CN114928224 A CN 114928224A CN 202210594011 A CN202210594011 A CN 202210594011A CN 114928224 A CN114928224 A CN 114928224A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 15
- 238000005086 pumping Methods 0.000 description 12
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
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Abstract
The present application relates to a multipurpose three-phase asynchronous motor, comprising: the stator comprises a stator core, the stator core comprises a first magnetic flux section and a second magnetic flux section, grooves for winding are formed in the first magnetic flux section and the second magnetic flux section, and the first magnetic flux section and the second magnetic flux section are independent from each other; the rotor comprises a rotor iron core and a rotor winding, the rotor winding is sleeved on the rotor iron core and comprises a winding and a cage type winding, the winding corresponds to the first magnetic flux section, and the cage type winding corresponds to the second magnetic flux section. The scheme provided by the application can select the energy-saving mode operation or the conventional mode operation, adjust the slip ratio of the stator core and the rotor core according to the actual requirement, realize the multipurpose use of the motor and enlarge the adjustment range of the asynchronous motor for users.
Description
Technical Field
The application relates to the technical field of three-phase asynchronous motor design, in particular to a multipurpose three-phase asynchronous motor.
Background
A three-phase asynchronous motor (Triple-phase asynchronous motor) is one kind of induction motor, and is a motor powered by simultaneously connecting 380V three-phase alternating current (phase difference is 120 degrees), and because a rotor and a stator rotating magnetic field of the three-phase asynchronous motor rotate in the same direction and at different rotating speeds, and have slip ratios, the three-phase asynchronous motor is called; the rotating speed of the rotor of the three-phase asynchronous motor is lower than that of a rotating magnetic field, and the rotor winding generates electromotive force and current due to relative motion with the magnetic field and interacts with the magnetic field to generate electromagnetic torque so as to realize energy conversion.
At present, most of motors used in China are common motors, and the common motors have relatively high energy consumption and often have the effect inferior to that of motors with ultrahigh slip ratio (three-phase asynchronous motors); the three-phase asynchronous motor can be divided into a cage type asynchronous motor and a winding type asynchronous motor, the cage type rotor asynchronous motor is simple in structure, reliable in operation, light in weight, low in price and widely applied, and the main defect of the asynchronous motor is that speed regulation is difficult; the rotor and the stator of the wound three-phase asynchronous motor are also provided with three-phase windings and are connected with an external rheostat through a slip ring and an electric brush, and the starting performance of the motor can be improved and the rotating speed of the motor can be adjusted by adjusting the resistance of the rheostat; however, both of them are applied to different scenes, and the types of motors used correspondingly are different for different requirements, so that the adaptability of the motors is greatly reduced, inconvenience is caused to users, and the adjustment range of one type of motor is very limited, and the motor cannot meet various application scenes; for example, for a motor with energy saving requirement, only an asynchronous motor with high slip ratio can be adopted, but the asynchronous motor with cage rotor cannot regulate speed, so that the two types of motors are incompatible, and the adjustable range of the motor is greatly reduced.
Therefore, how to design an asynchronous motor with strong applicability, large adjustment range and high slip ratio is a technical problem to be solved by technical personnel at present.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides a multipurpose three-phase asynchronous motor, which can select a first magnetic flux section or a second magnetic flux section to be electrified according to the application requirement of the motor, change the slip ratio of a stator core and a rotor core of the motor, select an energy-saving mode operation or a conventional mode operation, adjust the slip ratio of the stator core and the rotor core according to the actual requirement, realize the multipurpose motor, and enlarge the adjustment range of a user on the asynchronous motor.
In order to achieve the above object, the present invention mainly adopts the following technical scheme as a multipurpose three-phase asynchronous motor, comprising: the stator comprises a stator core, the stator core comprises a first magnetic flux section and a second magnetic flux section, wherein the first magnetic flux section and the second magnetic flux section are respectively provided with a groove for winding, and the first magnetic flux section and the second magnetic flux section are independent from each other; the rotor comprises a rotor core and a rotor winding, the rotor winding is sleeved on the rotor core and comprises a winding and a cage winding, the winding corresponds to the first magnetic flux section, and the cage winding corresponds to the second magnetic flux section; wherein, the cage type winding uses the copper wire coil, the winding uses the galvanized steel wire coil.
Preferably, the rotor core includes an end cap section, a winding section, a cage section and a housing section, wherein the diameter of the cage section is larger than that of the winding section, the diameter of the end cap section is smaller than that of the cage section, and the diameter of the housing section is equal to that of the end cap section.
Preferably, the winding is fixed on the winding section, the cage winding is fixed on the cage section, and the air gap of the winding section is larger than that of the cage section.
Preferably, an insulating ring is arranged between the first magnetic flux section and the second magnetic flux section, the insulating ring is respectively matched with the first magnetic flux section and the second magnetic flux section, and the number of grooves of the first magnetic flux section is equal to that of grooves of the second magnetic flux section.
Preferably, the cage-type winding comprises a first end ring, a second end ring and a plurality of copper bars, wherein two ends of each copper bar are respectively and rigidly connected with the first end ring and the second end ring; the copper bars are parallel to each other, and the included angle between the copper bars and the first end ring is a non-right angle.
Preferably, ventilation covers are arranged on the surface of the first end ring and the surface of the second end ring, wherein the ventilation covers are made of silicon steel sheets, and a through hole is formed in the center of each ventilation cover and is used for being matched with the rotor iron core.
Preferably, the wire-wound winding is a symmetrical three-phase winding, the three-phase winding is made of a silicon steel sheet, and the galvanized steel wire coil is wound on the silicon steel sheet.
Preferably, the distance between the wound winding and the cage winding is greater than or equal to the thickness of the insulating ring.
The technical scheme provided by the application can comprise the following beneficial effects:
in the application, a stator core in a motor stator is divided into a first magnetic flux section and a second magnetic flux section through transformation and upgrading of an original three-phase asynchronous motor, the first magnetic flux section and the second magnetic flux section are mutually independent, grooves are formed in the first magnetic flux section and the second magnetic flux section, a rotor winding comprising a winding and a cage winding is sleeved on a rotor core of a rotor, the winding corresponds to the first magnetic flux section, the cage winding corresponds to the second magnetic flux section, a copper wire coil is used on the cage winding, a galvanized steel wire coil is used on the winding, the resistances of the winding and the cage winding are inconsistent, different sections of the stator core and the rotor core can generate different torques (the larger the resistance is, the larger the torque is), the first magnetic flux section or the second magnetic flux section can be selected to be electrified according to the use requirement of the motor, the slip ratio of the stator iron core and the rotor iron core is changed, the energy-saving mode operation or the conventional mode operation is selected, the slip ratio of the stator iron core and the rotor iron core is adjusted according to actual requirements, the multipurpose use motor is realized, and the adjustment range of a user on the asynchronous motor is enlarged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the application.
Fig. 1 is a schematic cross-sectional structure view of a multipurpose three-phase asynchronous motor according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional structural view of a rotor shown in an embodiment of the present application;
FIG. 3 is a side cross-sectional view of a stator shown in an embodiment of the present application;
fig. 4 is a schematic perspective view of a cage winding according to an embodiment of the present application;
in the figure: the magnetic flux-cored motor comprises a stator-10, a stator core-11, a first magnetic flux section-12, a second magnetic flux section-13, a rotor-20, a rotor core-21, an end cover section-211, a winding section-212, a cage section-213, a housing section-214, a rotor winding-22, a winding-221, a cage winding-222, a first end ring-223, a second end ring-224, a copper bar-225, an end cover-30, a housing-40, a groove-A, an insulating ring-B, a ventilation cover-C and a through hole-D.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application have been illustrated in the accompanying drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
At present, most of motors used in China are common motors, and the common motors have relatively high energy consumption and often have the effect inferior to that of motors with ultrahigh slip ratio (three-phase asynchronous motors); the three-phase asynchronous motor can be divided into a cage type asynchronous motor and a winding type asynchronous motor, the cage type rotor asynchronous motor is simple in structure, reliable in operation, light in weight, low in price and widely applied, and the main defect of the asynchronous motor is that speed regulation is difficult; the rotor and the stator of the wound three-phase asynchronous motor are also provided with three-phase windings and are connected with an external rheostat through a slip ring and an electric brush, and the starting performance of the motor and the rotating speed of the motor can be improved by adjusting the resistance of the rheostat; however, both of them are applied to different scenes, and the types of motors used correspondingly are different for different requirements, so that the adaptability of the motors is greatly reduced, inconvenience is caused to users, and the adjustment range of one type of motor is very limited, and the motor cannot meet various application scenes.
In view of the above problems, embodiments of the present application provide a multipurpose three-phase asynchronous motor, which can select a first magnetic flux segment or a second magnetic flux segment to be energized according to the needs of the motor application, change the slip ratio between a stator core and a rotor core, select an energy-saving mode operation or a normal mode operation, adjust the slip ratio between the stator core and the rotor core according to the actual needs, implement a multipurpose motor, and increase the adjustment range of the asynchronous motor for a user.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic cross-sectional structure diagram of a multipurpose three-phase asynchronous motor according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional structural view of a rotor shown in an embodiment of the present application;
FIG. 3 is a side cross-sectional view of a stator shown in an embodiment of the present application;
fig. 4 is a schematic perspective view of a cage-type winding according to an embodiment of the present application.
Referring to fig. 1, 2, 3, and 4, the multipurpose three-phase asynchronous motor includes a stator 10, a rotor 20, an end cover 30, and a housing 40, wherein the rotor 20 is disposed in the stator 10, the end cover 30 and the housing 40 are respectively used for fixing two ends of a rotating shaft of the rotor 20, the stator 10 includes a stator core 11, the stator core 11 includes a first magnetic flux section 12 and a second magnetic flux section 13, wherein the first magnetic flux section 12 and the second magnetic flux section 13 are both provided with a groove a for winding, and the first magnetic flux section 12 and the second magnetic flux section 13 are independent of each other; the rotor 20 includes a rotor core 21 and a rotor winding 22, the rotor winding 22 is sleeved on the rotor core 21, the rotor winding 22 includes a winding 221 and a cage winding 222, the winding 221 corresponds to the first magnetic flux section 12, and the cage winding 222 corresponds to the second magnetic flux section 13; the cage winding 222 is a copper wire coil, and the winding 221 is a galvanized steel wire coil.
Specifically, the rotor core 21 includes an end cover section 211, a winding section 212, a cage section 213, and a housing section 214, wherein a diameter of the cage section 213 is larger than a diameter of the winding section 212, a diameter of the end cover section 211 is smaller than a diameter of the cage section 213, and a diameter of the housing section 214 is equal to the diameter of the end cover section 211.
Specifically, the winding 221 is fixed on the winding section 212, the cage winding 222 is fixed on the cage section 213, and the air gap of the winding section 212 is larger than that of the cage section 212.
Specifically, an insulating ring B is arranged between the first magnetic flux segment 12 and the second magnetic flux segment 13, the insulating ring B is respectively matched with the first magnetic flux segment 12 and the second magnetic flux segment 13, and the number of the grooves a of the first magnetic flux segment 12 is equal to that of the grooves a of the second magnetic flux segment 13.
Specifically, the cage winding 222 includes a first end ring 223, a second end ring 224 and a plurality of copper bars 225, and both ends of the copper bars 225 are rigidly connected to the first end ring 223 and the second end ring 224, respectively; the copper bars 225 are parallel to each other, and an included angle between the copper bars 225 and the first end ring 223 is a non-right angle.
Specifically, the surface of the first end ring 223 and the surface of the second end ring 224 are both provided with a ventilation cover sheet C, wherein the ventilation cover sheet C is made of silicon steel sheet, and the center of the ventilation cover sheet C is provided with a through hole D for adapting to the rotor core 21.
Specifically, the winding 212 is a symmetrical three-phase winding, the three-phase winding is made of silicon steel sheets, and the galvanized steel wire coil is wound on the silicon steel sheets.
Specifically, the distance between the wire winding 221 and the cage winding 222 is greater than or equal to the thickness of the insulating ring B.
Example one
In the embodiment, in order to design an asynchronous motor with strong applicability, large adjustment range and high slip ratio, the adjustable range of the motor is expanded, and the compatibility of the motor is improved; the embodiment improves the original three-phase asynchronous motor, a stator iron core in a motor stator is divided into a first magnetic flux section and a second magnetic flux section which are independent from each other, grooves are arranged in the first magnetic flux section and the second magnetic flux section, a rotor winding comprising a winding and a cage winding is sleeved on a rotor iron core of a rotor, the winding corresponds to the first magnetic flux section, the cage winding corresponds to the second magnetic flux section, a copper wire coil is used on the cage winding, a zinc-plated steel wire coil is used on the winding, so that the resistances of the winding and the cage winding are inconsistent, different sections of the stator iron core and the rotor iron core can generate different torques (the larger the resistance is, the larger the torque is), the first magnetic flux section or the second magnetic flux section can be selected to be electrified according to the use requirements of the motor, the slip ratio of the stator iron core and the rotor iron core is changed, and then can choose energy-conserving mode operation or normal mode to operate, adjust the slip ratio of stator core and rotor core according to actual needs, realize the multipurpose and use the motor, increased the user to the control range of asynchronous motor.
It should be noted that the asynchronous motor with cage rotor has simple structure, reliable operation, light weight, low price, wide application and the main disadvantage of difficult speed regulation; the rotor and stator of the wound three-phase asynchronous motor are also provided with three-phase windings and are connected with an external rheostat through a slip ring and an electric brush, and the starting performance of the motor can be improved and the rotating speed of the motor can be adjusted by adjusting the resistance of the rheostat. According to the characteristics that corresponding advantages and disadvantages of a winding and a cage winding are different; therefore, the user can select different operation modes to adjust the use purpose of the motor according to different practical application scenes, such as:
for some application scenes without requirements on starting performance and rotating speed regulation, a part of the motor can be used, namely, only the cage-type winding part is electrified, the power supply of the winding part is closed, and the rotating speed is provided for the motor only by utilizing the second magnetic flux section and the cage-type winding, so that the most suitable application mode is adapted; in the scene that the rotating speed of the motor needs to be controlled according to the situation or the electric energy needs to be saved, the first magnetic flux section and the winding coil can be electrified, the power supply of the cage-shaped winding part is turned off, and the winding coil is utilized to rotate the rotor core, so that different scenes can be used in the most adaptive mode; in addition, when the motor is applied to a scene with a strong power demand, the first magnetic flux section and the second magnetic flux section on the stator iron core can be electrified, the winding and the cage winding can be electrified at the same time, and the rotor iron core is rotated at the same time to realize strong power output; when the motor is electrified simultaneously, the motor can be further adjusted by adjusting the resistance of the rheostat, the control and regulation of the rotation speed, the energy conservation, the torque and the like of the motor can be realized simultaneously, the regulation and control range of the motor is greatly improved, the motor can be applied in various scenes, and the adaptability of the motor is enhanced.
It is worth noting that the high slip ratio motor is characterized in that the slip ratio of the motor is improved by changing the groove shape of the rotor and the material of the conducting bar, and the resistance of the rotor is increased, so that the motor has the characteristics of larger locked-rotor torque, smaller locked-rotor current, higher slip ratio, soft mechanical property and the like; when the impact load is dragged, the rotating speed of the motor is reduced more, so that the flywheel of the dragged equipment can play the stored function; the high slip ratio motor is suitable for working occasions with large transmission flywheel torque, uneven impact load and more reversal times; for example: mechanical equipment such as hammering machines, scissors machines, stamping machines, forging machines and the like; in addition, in the field of energy-saving products, the largest application of the high-slip-ratio motor is an oil pumping unit system in an oil field. It should be noted that, because the pumping unit has special requirements for operation, the matched dragging device must simultaneously meet three maximum requirements, namely, maximum stroke frequency and maximum allowable weight; in addition, enough locked-rotor torque is required to overcome the serious static unbalance when the pumping unit is started; therefore, the installation capacity margin determined during the design of the oil pumping unit is often large.
In addition, for a common motor, the efficiency and the power factor of the high-slip-ratio motor are extremely low, and are higher than those of the common motor, so that the active power is reduced, and the power factor is improved. Therefore, in terms of energy saving, the oil pumping unit is reasonable to match with the ultrahigh slip motor, the slip ratio is high and low, the mechanical properties are moderate in hardness, and otherwise, the practicability and the reliability of the oil pumping unit are adversely affected. The high slip ratio motor has the advantages that: 1. the starting torque of the motor is large, the starting current is small, and the pumping unit can be started stably at one time; 2. the demand for power supply capacity is greatly reduced, for example, a transformer of an oil well metering station is originally used for 6 oil well motors, and when an ultrahigh slip ratio motor is adopted, the transformer can be used for 7 to 8 oil well motors. 3. The motor has obvious electricity-saving effect and the electricity-saving principle of the motor with ultrahigh slip ratio; firstly, the motor with smaller capacity can replace the common motor with larger capacity to achieve reasonable power matching, thereby reducing the fixed loss; secondly, the power generation state of the pumping unit during operation can be greatly reduced or even eliminated, and the loss of energy in the process of useless transmission is reduced; thirdly, the motor has a flat efficiency characteristic curve, and can obtain higher average efficiency when running on the oil pumping unit than a common motor; therefore, under the condition of reasonable matching, the ultrahigh slip ratio motor has better energy-saving effect; 4. the maximum net torque value and the torque variation range in the reduction gearbox can be reduced, and gear beating of the reduction gearbox is reduced; the maximum stress and the stress variation range of the sucker rod are reduced, and the accidents of rod breaking and rod falling are reduced, so that the fatigue damage of the pumping unit is reduced, the service life of an oil pumping system is prolonged, the well stopping time is reduced, and the like; 5. the pumping unit always works in a good power matching state under the condition of not replacing the motor by simply changing the wiring selection output form of the motor.
In practical application, three-phase alternating current is introduced into a stator winding to generate a rotating magnetic field inside the stator winding, the rotating magnetic field cuts a rotor conductor to generate induced electromotive force, the induced electromotive force generates induced current in a conductor closed loop, the rotor current and the stator magnetic field interact to generate electromagnetic force to drive a rotor to rotate, and the rotating direction is consistent with the rotating magnetic field direction of a stator; under the condition of no external force influence, the speed of the rotor rotation is lower than that of the stator magnetic field rotation, and the ratio of the difference between the speed of the stator magnetic field rotation and the speed of the rotor rotation to the rotation speed of the stator magnetic field is the slip ratio. In addition, the air gap of the asynchronous motor is very small, and the size of a small and medium-sized motor is generally 0.2-2 mm; the larger the air gap of the asynchronous motor is, the larger the magnetic resistance of the asynchronous motor is, and the larger exciting current is needed to generate a magnetic field with the same size; therefore, due to the existence of the air gap, the magnetic circuit reluctance of the asynchronous motor is far larger than that of the transformer, so that the exciting current of the asynchronous motor is also much larger than that of the transformer; the exciting current of the transformer is about 3% of the rated current, the exciting current of the asynchronous motor is about 30% of the rated current, and the exciting current is a reactive current, so that the larger the exciting current is.
Example two
In the present embodiment, in order to further describe the multipurpose three-phase asynchronous motor for easy understanding and implementation thereof, the present embodiment divides the rotor core into an end cap section, a winding section, a cage section, and a housing section, wherein a diameter of the cage section is set to be larger than a diameter of the winding section, a diameter of the end cap section is set to be smaller than a diameter of the cage section, and a diameter of the housing section is set to be equal to the diameter of the end cap section; when the rotor core rotates under the same condition, because the diameters of all the sections are different, the torques generated by all the sections are different, the regulation and control range of the multipurpose three-phase asynchronous motor is further improved, and meanwhile, the interior of the motor can be better divided and grouped. In addition, in order to adapt to the structural characteristics of the rotor core, the winding is fixed (rigidly connected) on the winding section, the cage winding is fixed (rigidly connected) on the cage section, and the air gap of the winding section is set to be larger than that of the winding section, so that the rotor and the stator generate different slip after the first magnetic flux section and the second magnetic flux section are electrified, and the adjustable range of the multipurpose three-phase asynchronous motor is expanded.
It should be noted that, in order to prevent the first magnetic flux segment and the first magnetic flux segment from being electrified to cause short circuit of the motor, an insulating ring is further disposed between the first magnetic flux segment and the first magnetic flux segment, and the insulating ring is respectively adapted to the first magnetic flux segment and the first magnetic flux segment, that is, the insulating ring has a shape that the first magnetic flux segment and the first magnetic flux segment are identical and are located right between the first magnetic flux segment and the first magnetic flux segment; in addition, in order to realize the same constant quantity of the first magnetic flux section and the second magnetic flux section, independent variables can be controlled so as to be convenient for an operator to regulate and control, the number of the grooves of the first magnetic flux section is set to be equal to the number of the grooves of the first magnetic flux section.
EXAMPLE III
In the embodiment, for concreteness, the cage winding and the cage winding are described in detail so as to be convenient for the operation and understanding of a user, and the structural characteristics of the internal parts of the multipurpose three-phase asynchronous motor are clearly shown; in order to realize complete winding of the wire and manufacture a winding with simple structure and low price, the embodiment designs the cage-shaped winding into a whole consisting of a first end ring, a second end ring, a plurality of copper bars and other components, and realizes rigid connection between two ends of the copper bars and the first end ring and the second end ring respectively so as to stabilize the whole structure of the cage-shaped winding; in order to ensure that the magnetic force applied to the rotor is equal, the copper bars of the cage-shaped winding are arranged to be parallel to each other to realize the equality, and in addition, the included angle between the copper bars and the first end ring is a non-right angle, so that the copper bars and the magnetic field generated inside the stator are cut; in order to prevent the deformation of the overall structure of the cage-type winding and facilitate the sleeving of the entire cage-type winding on the rotor core, ventilation cover plates are further disposed on the surfaces of the first end ring and the second end ring, and it is noted that the ventilation cover plates are made of silicon steel sheets, wherein a through hole is disposed in the center of each ventilation cover plate and is used for penetrating through the rotor core.
It should also be noted that the cage-type winding is a symmetrical three-phase winding, the three-phase winding is composed of three silicon steel sheets, the silicon steel sheets are fixed on the winding line segment, and the galvanized steel wire coil is wound on the silicon steel sheets; in addition, in order to separate the two windings and prevent the two windings from contacting with each other, a space is arranged between the winding wire and the cage-shaped winding, and the linear distance of the space is set to be larger than or equal to the thickness of the insulating ring and corresponds to the first magnetic flux section and the second magnetic flux section; the cage-type winding is a symmetrical three-phase winding which is actually a winding having the same structure as the stator core (the specific shape can refer to fig. 3), and the main difference is that the size of the cage-type winding is smaller than that of the stator core, because the cage-type winding is sleeved inside the stator core.
It is worth noting that the three-phase winding has a regular structure: the number of slots of each phase of winding is equal and the windings are uniformly distributed on the stator; the three-phase windings are spaced at an electrical angle of 120 degrees; the three-phase winding generally adopts 60-degree phase belts, namely, the three-phase effective edge is uniformly divided into 6 phase belts under a pair of magnetic fields. The construction method and the steps of the three-phase double-layer winding are as follows: 1. uniformly dividing the total number of the slots according to the given number of poles (N and S poles are distributed adjacently) and marking the assumed induced potential direction; uniformly dividing the number of the grooves of each polar region according to three phases; three phases are staggered by 120 electrical angles in space; 2. marking the number of the coil according to the given coil pitch and the number of the slot where the upper layer edge is located by connecting the coils (the upper layer edge and the lower layer edge are combined into one coil); connecting certain two coil edges belonging to the same phase in the same polar region into a coil; 3. 2p coils belonging to the same phase are connected into a phase winding, the head end and the tail end of the phase winding are marked, the phase winding is connected in series and in parallel, the potential addition principle is adopted, and other two phases are constructed according to the same method.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. Those skilled in the art should also appreciate that acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. The utility model provides a multipurpose three-phase asynchronous motor, including stator, rotor, end cover and housing, the rotor sets up in the stator, the end cover with the housing is used for fixing respectively the pivot both ends of rotor, the stator is including stator core, its characterized in that:
the stator core comprises a first magnetic flux section and a second magnetic flux section, wherein grooves for winding are formed in the first magnetic flux section and the second magnetic flux section, and the first magnetic flux section and the second magnetic flux section are independent of each other;
the rotor comprises a rotor core and a rotor winding, the rotor winding is sleeved on the rotor core and comprises a winding and a cage winding, the winding corresponds to the first magnetic flux section, and the cage winding corresponds to the second magnetic flux section; the cage-type winding is a copper wire coil, and the winding is a galvanized steel wire coil.
2. A multi-purpose, three-phase, asynchronous motor according to claim 1, wherein said rotor core comprises an end cap section, a winding section, a cage section and a housing section, wherein said cage section has a diameter greater than a diameter of said winding section, said end cap section has a diameter less than a diameter of said cage section, and said housing section has a diameter equal to a diameter of said end cap section.
3. A multi-purpose, three-phase, asynchronous motor according to claim 2, wherein said winding is secured to said winding section, said cage winding is secured to said cage section, and said winding section has an air gap greater than said cage section.
4. The multipurpose three-phase asynchronous motor according to claim 1, wherein an insulating ring is arranged between the first magnetic flux segment and the second magnetic flux segment, the insulating ring is respectively matched with the first magnetic flux segment and the second magnetic flux segment, and the number of grooves of the first magnetic flux segment is equal to that of the grooves of the second magnetic flux segment.
5. A multi-purpose, three-phase asynchronous motor according to claim 1, wherein said cage winding comprises a first end ring, a second end ring and a plurality of copper bars, said copper bars being rigidly connected at both ends to said first end ring and said second end ring, respectively; the copper bars are parallel to each other, and an included angle between each copper bar and the first end ring is a non-right angle.
6. The multipurpose three-phase asynchronous motor according to claim 5, wherein ventilation cover plates are arranged on the surfaces of the first end ring and the second end ring, wherein the ventilation cover plates are made of silicon steel sheets, and a through hole is arranged in the center of each ventilation cover plate and is used for being matched with the rotor core.
7. The multi-purpose, three-phase asynchronous motor according to claim 1, wherein said wound windings are symmetrical three-phase windings, said three-phase windings are made of silicon steel sheets, and said galvanized wire coils are wound on the silicon steel sheets.
8. A multi-purpose, three-phase asynchronous motor according to claim 4, characterized in that the distance between said winding and said cage winding is greater than or equal to the thickness of said insulating ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210594011.1A CN114928224A (en) | 2022-05-27 | 2022-05-27 | Multipurpose three-phase asynchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210594011.1A CN114928224A (en) | 2022-05-27 | 2022-05-27 | Multipurpose three-phase asynchronous motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB394742A (en) * | 1932-01-29 | 1933-07-06 | British Thomson Houston Co Ltd | Improvements in and relating to electric motors |
| GB1293947A (en) * | 1968-12-19 | 1972-10-25 | Orazio Fabbrini | An induction motor |
| CN1036485A (en) * | 1988-12-21 | 1989-10-18 | 冉声扬 | Adopt and restraint the winding winding entirely mutually, and have the AC speed regulating motor of two output shafts |
| JP2004007910A (en) * | 2002-05-31 | 2004-01-08 | Shinano Kenshi Co Ltd | Induction motor |
| CN1905329A (en) * | 2005-07-25 | 2007-01-31 | 刘嵩 | Multi-stage three phase ac motor |
| CN201204525Y (en) * | 2008-05-26 | 2009-03-04 | 北京天科伟业环境科技有限公司 | Integral multi-speed multi-power motor |
-
2022
- 2022-05-27 CN CN202210594011.1A patent/CN114928224A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB394742A (en) * | 1932-01-29 | 1933-07-06 | British Thomson Houston Co Ltd | Improvements in and relating to electric motors |
| GB1293947A (en) * | 1968-12-19 | 1972-10-25 | Orazio Fabbrini | An induction motor |
| CN1036485A (en) * | 1988-12-21 | 1989-10-18 | 冉声扬 | Adopt and restraint the winding winding entirely mutually, and have the AC speed regulating motor of two output shafts |
| JP2004007910A (en) * | 2002-05-31 | 2004-01-08 | Shinano Kenshi Co Ltd | Induction motor |
| CN1905329A (en) * | 2005-07-25 | 2007-01-31 | 刘嵩 | Multi-stage three phase ac motor |
| CN201204525Y (en) * | 2008-05-26 | 2009-03-04 | 北京天科伟业环境科技有限公司 | Integral multi-speed multi-power motor |
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