CN215071845U - Multi-axis switched reluctance motor - Google Patents
Multi-axis switched reluctance motor Download PDFInfo
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- CN215071845U CN215071845U CN202120746769.3U CN202120746769U CN215071845U CN 215071845 U CN215071845 U CN 215071845U CN 202120746769 U CN202120746769 U CN 202120746769U CN 215071845 U CN215071845 U CN 215071845U
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Abstract
The utility model provides a multiaxis switch reluctance motor, including a stator, a plurality of rotors, the coiling in a plurality of windings on the stator, and respectively with a plurality of rotation axes of rotor fixed connection, wherein, n is the positive integer, and n more than or equal to 2. The structural design of the n-rotor rotating shaft with the 1 stator and the n rotor sets the switched reluctance motor to be a multi-shaft structure, such as two shafts, three shafts or even more shafts, and has the advantages of compact structure, low equipment cost, small occupied area and high production efficiency. In addition, the position of rotor is designed according to the actual application needs, the shape of stator is then designed according to the position of rotor, and the cross sectional shape of stator no longer is limited in traditional circular shape, consequently can suitably increase the external diameter of stator, is favorable to improving output torque to improve the output of motor.
Description
Technical Field
The utility model relates to the field of electric machines, specifically relate to a switched reluctance motor.
Background
The switched reluctance motor (hereinafter referred to as SR motor) is a component of a switched reluctance motor driving system, is a component for realizing electromechanical energy conversion in the switched reluctance motor driving system, and has the advantages of large starting torque, good low-speed performance, wide speed regulation range, reliable work, and adaptability to various severe, high-temperature and even strong vibration environments compared with an asynchronous motor. As a novel speed regulating system, the SR motor is widely applied to the industrial production fields of vehicle traction, fans, pumps, windlasses and the like.
The conventional SR motor is designed in a single shaft, and comprises a stator, a rotor, a rotating shaft and a winding coil wound on the stator, wherein the stator, the rotor and the rotating shaft are designed in a sleeved mode, so that the operation of one component can be well driven, but in actual production, a plurality of scenes needing to drive a plurality of components to operate simultaneously exist, for example, a double-shaft adjustable stirrer disclosed in patent WO2018195785A1 is provided, two stirring components are designed for fully stirring raw materials, and two groups of power components are needed for driving the raw materials to operate smoothly, and for example, as shown in the attached drawing disclosed by the patent, two groups of motors are adopted to drive two stirring shafts to operate respectively. If the SR motors in the prior art are used to realize the dual-axis adjustable stirring, as shown in fig. 1, two SR motors need to be correspondingly arranged, and the two SR motors are combined and linked in different directions, so that the equipment cost including control equipment is greatly increased, the pressure of a power supply end is increased, and the driving efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to adapt to the needs in specific industrial production field, the utility model provides a multiaxis switch reluctance motor, including being no less than two rotors and the rotation axis of supporting mutually with the rotor, be favorable to improving the production efficiency that has multiaxis drive demand production field, reduce the cost expenditure of equipment.
The utility model provides an one of the technical scheme does:
a multi-axis switched reluctance motor comprising:
a stator of a salient pole structure, n rotors of a salient pole structure, windings provided on the stator, and n rotary shafts; the stator comprises a stator yoke and a plurality of stator teeth arranged along the circumferential direction of the stator yoke; the stator teeth are divided into n groups and arranged on the stator yoke, and each group of the stator teeth respectively pulls one rotor to rotate;
each rotor comprises a rotor yoke and a plurality of rotor teeth arranged along the circumferential direction of the rotor yoke, and the rotor yoke is fixedly connected with the rotating shaft;
wherein n is a positive integer and n is greater than or equal to 2.
In other optimized technical schemes, the rotating speed and the power of each group of rotors are independent.
In other preferred embodiments, the rotational speed of each set of rotors is inversely proportional to the number of teeth of the set of rotors.
In other optimized technical schemes, each group of the stator teeth are respectively distributed along the circumferential direction of the stator yoke at equal intervals, and stator slots are formed between adjacent stator teeth; the windings are placed in stator slots formed between the stator teeth; the rotor teeth of each rotor are respectively arranged at equal intervals along the circumferential direction of the rotor yoke, and rotor grooves are formed between the adjacent rotor teeth.
In other optimized technical solutions, the multi-axis switched reluctance motor further includes a first air gap and a second air gap;
a gap formed between the stator tooth surface and the opposing rotor tooth surface when the stator tooth is opposing the rotor tooth is the first air gap; when the stator teeth are staggered from the rotor teeth, a gap formed between the stator tooth surface and the opposite bottom of the rotor slot is the second air gap;
wherein the gap height of the second air gap is not less than 20 times the gap height of the first air gap.
In other optimized technical schemes, each rotor is sleeved in the stator, and rotor teeth of every two rotors are meshed with each other.
In other optimized technical scheme, the tooth form of the rotor tooth is an involute tooth.
In other optimized technical solutions, the multi-axis switched reluctance motor further includes a control system, where the control system includes a detection device and a control device, and is used to adjust and control the current in the winding, and the control device makes a judgment according to a signal of the detection device, and adjusts the switching, the advance angle, and the amplitude of the current in the winding.
In other preferred embodiments, the detection device includes at least one of a temperature sensor, a current sensor, or a position sensor.
In other optimized technical solutions, the control device includes a driving module and a power circuit.
The utility model has the advantages that:
the utility model discloses a structural design of 1 stator n rotor n rotation axis sets up switched reluctance motor into multiaxis structure, if diaxon, triaxial are more the axle number even, have compact structure, low in equipment cost, area is little, advantage that production efficiency is high.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some of the embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a diagram of two single-axis switched reluctance machines of the prior art;
fig. 2 is a two-shaft switched reluctance motor of embodiment 1;
fig. 3 is a two-shaft roots rotor tooth switched reluctance motor of embodiment 2;
fig. 4 is a three-axis switched reluctance motor in embodiment 3.
Description of reference numerals:
1-stator, 2-rotor, 3-axis of rotation, 4-winding, 11-stator yoke, 12-stator teeth, 13-stator slots, 21-rotor teeth, 22-rotor yoke, 23-rotor slots, 51-first air gap, 52-second air gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the description of the present invention, the descriptions of "first", "second", etc. are used for descriptive purposes only and should not be interpreted as indicating or implying any limitation to the number of technical features. All directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific state (as shown in the drawings), and if the specific state changes, the directional indicator changes accordingly. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
When a certain production equipment needs to be driven by two sets of motors, as shown in fig. 1, in the prior art, two switched reluctance motors need to be arranged, and each switched reluctance motor comprises two sets of stators 1, two sets of rotors 2, two sets of rotating shafts 3 and two sets of windings 4, each set of stator comprises a stator yoke 11 and a stator tooth 12, each set of rotor comprises a rotor tooth 21 and a rotor yoke 22, and two sets of power converters, controllers and detectors need to be configured at the same time, so that the cost of the equipment is obviously improved, and the production pressure is increased.
Example 1:
the present embodiment provides a multi-axis switched reluctance motor, as shown in fig. 2: the multi-axis switched reluctance motor comprises a stator 1 and two rotors 2, wherein the stator 1 and the rotors 2 are formed by stacking a plurality of steel sheets along the direction of a rotating shaft 3, the stator 1 and the rotors 2 have a certain thickness, each rotor 2 is fixedly connected with the rotating shaft 3, a coil is wound on the stator 1 to form a winding 4, and an excitation winding for providing a working magnetic field for the multi-axis switched reluctance motor.
The stator 1 comprises a stator yoke 11 and twelve stator teeth 12 arranged along the circumferential direction of the stator yoke 11; twelve stator teeth 12 are divided into two groups, each group is arranged at the circumferential position of the stator yoke 11 in a centralized manner, and each group respectively pulls one rotor 2 to rotate. Each rotor 2 includes a rotor yoke 22, and ten rotor teeth 21 arranged along a circumferential direction of the rotor yoke 22, and the rotor yoke 22 is fixedly coupled to the rotary shaft 3. The structural design of the stator, the two rotors and the two rotor shafts can improve the utilization rate of each component, save equipment expenditure and improve production efficiency. The position of rotor 2 is designed according to actual application needs, the shape of stator 1 is then designed according to the position of rotor 2, and the cross-sectional shape of stator 1 is no longer restricted to traditional circular shape, as shown in figure 2, the effective stator profile that every rotor 2 matches is fan-shaped structure, in other embodiments, also can be according to actual application needs, design the outline of this stator 1 into other shapes, such as square, because need not be restricted to design the outline for circular stator 1, consequently can suitably increase the external diameter of stator 1, be favorable to improving output torque, thereby improve the output of motor.
In other preferred embodiments, the number of stator teeth of different sets of stator teeth 12 may be the same or different, and the interval portions of different sets of stator teeth 12 along the circumferential direction of the stator yoke 11 may be equal or unequal. The number of rotor teeth of different sets of rotor teeth 21 may be the same or different, and the interval portions of different sets of rotor teeth 21 in the circumferential direction of the rotor yoke 22 may be equal or different. The number of phases of the windings 4 in different groups is independent of each other, and can be single-phase, two-phase or multi-phase. The stack thickness of the different sets of stators 1 and/or rotors 2 may be equal or different.
Preferably, the multi-axis switched reluctance motor of the present embodiment further includes a control system, the control system includes a detection device and a control device, the detection device is used for adjusting and controlling the current in the winding, the detection device includes a temperature sensor and/or a current sensor and/or a position sensor, the control device includes a driving module and a power circuit, and the control system makes a judgment according to a signal of the sensor, and adjusts the switching, the advance angle and the amplitude of the winding current.
In other preferred embodiments, the control devices of different groups of stators 1 may be independent of each other or common, i.e. the number of drive modules and power circuits may be 1 or more; the detection means of the different groups of stators 1 can be independent of each other or common, i.e. the temperature sensor and/or the current sensor and/or the position sensor can be single or multiple. The rotation speed and power of each group of rotors 2 are independent of each other and can be equal or unequal.
In other preferred embodiments, it may be further optimized that each set of stator teeth 12 is distributed along the circumferential direction of the stator yoke 11 at equal intervals, and the stator slots 13 are formed between adjacent stator teeth 12; the rotor teeth 21 of each rotor 2 are arranged at equal intervals in the circumferential direction of the rotor yoke 22, and rotor grooves 23 are formed between adjacent rotor teeth 21; wherein the groove depth of the stator grooves 13 is larger than the groove depth of the rotor grooves 23. The design of the groove depth of the stator groove 13 is large, and a winding space as large as possible can be provided for the winding 4, so that a large winding coil section is obtained, and the reduction of the copper loss of the multi-shaft reluctance motor is facilitated. In other optimized embodiments, under the condition that rated output power is ensured and the winding space is allowed, the number of turns of the coil of each group of windings 4 can be appropriately encrypted, at this time, the more the number of turns, the smaller the peak value of the current passing through the winding coil, which is beneficial to reducing volt-ampere capacity of the switching tube, and meanwhile, because the copper consumption of the reluctance motor is in proportion to the square of the effective value of the current, the design scheme of the multi-shaft reluctance motor in the embodiment can also significantly reduce the copper consumption of the motor, thereby improving the efficiency of the motor.
In the present embodiment, the multi-axis reluctance motor further includes a first air gap 51 and a second air gap 52; as can be seen with continued reference to fig. 2, when stator tooth 12 is opposed to rotor tooth 21, the gap formed between the surface of stator tooth 12 and the surface of opposed rotor tooth 21 is the first air gap 51; when the stator teeth 12 are staggered from the rotor teeth 21, the gap formed between the surface of the stator teeth 12 and the bottom of the opposite rotor slot is the second air gap 52; and the gap height of the second air gap 52 is designed not to be less than 20 times the gap height of the first air gap 51. Wherein, the size of the first air gap 51 affects the maximum inductance value of the motor; the size of the second air gap 52 will affect the minimum inductance value of the motor. In this embodiment, in order to meet the requirement of reliable operation of the motor, the value of the first air gap 51 is not less than 0.25mm, and the value of the second air gap 52 can be adjusted about 30 times of the gap height of the first air gap 51, so that the output power of the motor is improved, and the size of the second air gap 52 is properly controlled, so that the shaft diameter meeting the requirement of the operation of the motor and the yoke height of the rotor yoke 22 are designed conveniently.
Example 2:
the present embodiment provides a dual-shaft roots rotor teeth switched reluctance motor, as shown in fig. 3, comprising a stator 1 and two rotors 2, wherein the stator 1 and the rotors 2 are formed by stacking a plurality of steel sheets along the direction of a rotating shaft 3, and have a certain thickness, each rotor 2 is fixedly connected with a rotating shaft 3, coils are wound on the stator 1 to form windings 4, and excitation windings for providing a working magnetic field to the multi-shaft roots rotor teeth switched reluctance motor. The stator 1 comprises a stator yoke 11 and twelve stator teeth 12 arranged along the circumferential direction of the stator yoke 11; twelve stator teeth 12 are divided into two groups, each group is arranged at the circumferential position of the stator yoke 11 in a centralized manner, and each group respectively pulls one rotor 2 to rotate. Each rotor 2 includes a rotor yoke 22, and ten rotor teeth 21 arranged along a circumferential direction of the rotor yoke 22, and the rotor yoke 22 is fixedly coupled to the rotary shaft 3.
The main differences between the structure and the structure of the embodiment 1 are as follows: two rotors 2 are all overlapped in stator 1, and the rotor teeth 21 intermeshing of two rotors 2, and the profile of tooth of rotor teeth 21 is the involute tooth, and the number of meshing points is few, has the meshing steadily, the interlock is inseparable, strike little, the noise is little advantage, and the bearing capacity of gear is also bigger, is favorable to improving the life-span and the stationarity of rotor teeth, can directly assemble roots vacuum pump with two sets of these rotors 2, and processing and assembly are easier.
As can be seen from fig. 3, in this embodiment, the outer contour of the stator 1 is designed to be square with rounded corners, so that the average yoke height of the stator yoke 11 is increased, which is beneficial to preventing the oversaturation phenomenon when the maximum magnetic flux density occurs in the yoke core, and the other structural designs are the same as those in embodiment 1.
Example 3:
the present embodiment provides a three-axis switched reluctance motor, as shown in fig. 4, which includes a stator 1 and three rotors 2, wherein each rotor 2 is fixedly connected to a rotating shaft 3, a coil is wound on the stator 1 to form a winding 4, and an excitation winding for providing a working magnetic field to the multi-axis switched reluctance motor. The stator 1 comprises a stator yoke 11 and eighteen stator teeth 12 arranged along the circumferential direction of the stator yoke 11; eighteen stator teeth 12 are divided into three groups, each group is intensively arranged on the circumferential position of the stator yoke 11, and respectively pulls one rotor 2 to rotate. Each rotor 2 includes a rotor yoke 22, and ten rotor teeth 21 arranged along a circumferential direction of the rotor yoke 22, and the rotor yoke 22 is fixedly coupled to the rotary shaft 3. The main difference between its structure and the above-mentioned embodiment lies in the number that has increased rotor 2 and rotation axis 3, nevertheless also belongs to the utility model discloses a protection scope, all can improve the utilization ratio of each subassembly in the actuating system, when reducing equipment cost, improves production efficiency.
In other embodiments, the stator structure may be configured as four groups, five groups or even more groups of rotor structures according to actual requirements, and these design schemes are all within the protection scope of the present invention.
The above mentioned is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, all the technical ideas of the present invention are that the various equivalent structures made by the contents of the specification and the drawings are changed or directly/indirectly applied to other related technical fields, and all the equivalent structures should belong to the scope defined in the claims of the present invention as long as they do not depart from the spirit of the present invention.
Claims (10)
1. A multi-axis switched reluctance motor characterized in that:
the rotor comprises a stator with a salient pole structure, n rotors with the salient pole structure, windings arranged on the stator and n rotating shafts; the stator comprises a stator yoke and a plurality of stator teeth arranged along the circumferential direction of the stator yoke; the stator teeth are divided into n groups and arranged on the stator yoke, and each group of the stator teeth respectively pulls one rotor to rotate;
each rotor comprises a rotor yoke and a plurality of rotor teeth arranged along the circumferential direction of the rotor yoke, and the rotor yoke is fixedly connected with the rotating shaft;
wherein n is a positive integer and n is greater than or equal to 2.
2. A multi-axis switched reluctance machine as claimed in claim 1, wherein:
the rotating speed and the power of each group of rotors are independent.
3. A multi-axis switched reluctance machine as claimed in claim 1, wherein:
the speed of rotation of each set of the rotors is inversely proportional to the number of teeth of the set of the rotors.
4. A multi-axis switched reluctance machine as claimed in claim 1, wherein:
each group of stator teeth are distributed along the circumferential direction of the stator yoke at equal intervals, and stator slots are formed between every two adjacent stator teeth; the windings are placed in stator slots formed between the stator teeth; the rotor teeth of each rotor are respectively arranged at equal intervals along the circumferential direction of the rotor yoke, and rotor grooves are formed between the adjacent rotor teeth.
5. A multi-axis switched reluctance machine according to claim 4, wherein:
the multi-axis switched reluctance motor further comprises a first air gap and a second air gap;
a gap formed between the stator tooth surface and the opposing rotor tooth surface when the stator tooth is opposing the rotor tooth is the first air gap; when the stator teeth are staggered from the rotor teeth, a gap formed between the stator tooth surface and the opposite bottom of the rotor slot is the second air gap;
wherein the gap height of the second air gap is not less than 20 times the gap height of the first air gap.
6. A multi-axis switched reluctance machine as claimed in claim 1, wherein:
every the rotor all overlaps and establishes in the stator, and every two the rotor tooth intermeshing of rotor.
7. A multi-axis switched reluctance machine according to claim 6, wherein:
the tooth profile of the rotor teeth is involute teeth.
8. A multi-axis switched reluctance motor as claimed in any one of claims 1 to 7, wherein:
the multi-axis switched reluctance motor further comprises a control system, wherein the control system comprises a detection device and a control device and is used for adjusting and controlling the current in the winding, and the control device makes judgment according to a signal of the detection device and adjusts the on-off, the advance angle and the amplitude of the current in the winding.
9. A multi-axis switched reluctance machine as claimed in claim 8, wherein:
the detection device includes at least one of a temperature sensor, a current sensor, or a position sensor.
10. A multi-axis switched reluctance machine as claimed in claim 8, wherein:
the control device comprises a driving module and a power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120746769.3U CN215071845U (en) | 2021-04-13 | 2021-04-13 | Multi-axis switched reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120746769.3U CN215071845U (en) | 2021-04-13 | 2021-04-13 | Multi-axis switched reluctance motor |
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| Publication Number | Publication Date |
|---|---|
| CN215071845U true CN215071845U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120746769.3U Active CN215071845U (en) | 2021-04-13 | 2021-04-13 | Multi-axis switched reluctance motor |
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|---|---|
| CN (1) | CN215071845U (en) |
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2021
- 2021-04-13 CN CN202120746769.3U patent/CN215071845U/en active Active
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