CN217036852U - Alternating current reluctance motor - Google Patents
Alternating current reluctance motor Download PDFInfo
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- CN217036852U CN217036852U CN202220870305.8U CN202220870305U CN217036852U CN 217036852 U CN217036852 U CN 217036852U CN 202220870305 U CN202220870305 U CN 202220870305U CN 217036852 U CN217036852 U CN 217036852U
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Abstract
The utility model belongs to the field of motors and discloses an alternating current reluctance motor which comprises a stator core, a winding and a rotor core, wherein the stator core comprises teeth and stator slots, and the number of the teeth and the number of the stator slots are m; the winding is a 3-phase distributed winding, and each phase of winding comprises m/3 coils; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two coil sides of different phases are arranged in any stator slot; the rotor core includes a rotor yoke portion, a salient pole, and a void, and a top circumferential width of the void is larger than a top circumferential width of the salient pole. According to the utility model, the coils are arranged across one slot and the coil sides of different phases are arranged in the same slot to form a three-phase alternating distributed winding, so that alternating-current tooth-by-tooth excitation is realized, and the salient poles are arranged by combining the rotor core, so that the performance of the reluctance motor is realized, the winding installation operation is simple, the number of leading-out wire heads is reduced, and further, the wiring is simple.
Description
Technical Field
The utility model relates to the field of motors, in particular to an alternating current reluctance motor.
Background
The switched reluctance motor adopts a centralized winding and has the advantage of the minimum end length, any coil is arranged on the same tooth through adjacent slots, the edge distance of the coil is very small, the manual operation space is very small, and the manual installation operation is difficult.
The alternating current motor adopts distributed windings, any coil is installed across multiple slots, the edge distance of the coil is large, and the manual operation space is large, so that the manual installation operation is easy, but the end part length of the coil is long.
The switched reluctance motor adopts a three-phase centralized winding, the number of winding outgoing line heads is generally 6, and the defect of more outgoing line heads exists; the alternating current motor adopts three-phase distributed winding, and the number of winding leading-out wire ends is usually 3, so that the advantage of fewer leading-out wire ends is achieved.
The switched reluctance motor and the alternating current motor have advantages and disadvantages in winding arrangement, whether the advantages of the two motors are combined or not can be overcome, and the problem which needs to be solved in the prior art is solved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide an alternating current reluctance motor, which can simplify the winding installation operation and reduce the number of leading-out wire ends by improving the winding arrangement, thereby simplifying the wiring.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
an alternating current reluctance motor comprises a stator core, a winding and a rotor core, wherein the stator core comprises teeth and stator slots which are alternately arranged, the number of the teeth and the number of the stator slots are m, and m is a multiple of 3; the winding is a 3-phase distributed winding, each phase of winding comprises m/3 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two different-phase coil sides are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width, so that the tooth top is the end part of the tooth close to the center of the stator core and is easy to understand; the rotor core comprises a rotor yoke portion, salient poles and empty slots, the salient poles are arranged along the circumferential direction of the rotor yoke portion, the empty slots are formed between the adjacent salient poles, the circumferential width of the tops of the empty slots is larger than that of the tops of the salient poles, the magnetic resistance of the salient poles is far smaller than that of the empty slots, the rotor core is easy to understand, the tops of the salient poles are the end portions of the salient poles far away from the circle center of the rotor core, and the tops of the empty slots far away from the circle center of the rotor core are the end portions of the empty slots.
In the present invention, preferably, the number of the salient poles and the empty slots is m/3, steps for increasing the tooth top air gap are provided on both sides of the tooth top of the tooth, steps for increasing the pole top air gap are provided on both sides of the pole top of the salient pole, and the pole top circumferential width of the salient pole is greater than or equal to the tooth top circumferential width of the tooth.
In the utility model, preferably, the number of the salient poles and the empty slots is 2m/3, steps for increasing the air gap of the tooth tops are arranged on two sides of the tooth tops of the teeth, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole tops of the salient poles, the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the tooth tops of the teeth, and the radial minimum thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole tops of the salient poles, so that the magnetic resistance of the salient poles is far smaller than that of the empty slots.
In the present invention, preferably, the number of the salient poles and the empty slots is m/3, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core, and the outer ring is fixedly connected with the pole tops of the salient poles, the circumferential width of the pole tops of the salient poles is greater than or equal to the circumferential width of the tooth tops, and the minimum radial thickness of the outer ring is less than 1/5 of the circumferential width of the pole tops of the salient poles, so as to ensure that the magnetic resistance of the salient poles is far less than that of the empty slots.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. the three-phase distributed winding has the advantages that the winding arrangement is improved, the winding installation operation is simple, the number of leading-out wire ends can be reduced, the wiring is simple, two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, namely the coil is arranged across one slot, the three-phase distributed winding has the minimum coil end length, the loss of the end part of the motor can be reduced, and the efficiency is improved.
2. The three-phase alternating distributed winding is arranged by arranging the coils across one slot and arranging the coil sides of different phases in the same slot, the main pole realizes single-tooth alternating excitation, and the principle of the single-tooth alternating excitation of the main pole of the switched reluctance motor is consistent with that of the single-tooth alternating excitation of the main pole of the switched reluctance motor, so the three-phase alternating distributed winding can be applied to the switched reluctance motor, and further realize that an alternating current power supply directly drives the switched reluctance motor. And do not adopt utility model winding structure's other alternating current motor's three-phase distributed winding, arbitrary coil all strides the multislot setting, lead to tip length overlength, increase coil end loss, a groove sets up a looks coil limit, the coil current is zero for zero slot current, the tooth of this groove both sides all excites for the main pole, what the main pole realized is that the multiple tooth excites in turn, with the principle that switched reluctance motor main pole monodentate excited in turn is not accorded with, so its winding setting mode can not directly be applied to switched reluctance motor.
Drawings
Fig. 1 is a schematic structural diagram of an ac reluctance motor according to the present invention.
Fig. 2 is a schematic view of the stator core and rotor core structures of embodiment 1 of the present invention.
Fig. 3 is a schematic view of the stator core and rotor core structures of embodiment 2 of the present invention.
Fig. 4 is a schematic view of the stator core and rotor core structures of embodiment 3 of the present invention.
Fig. 5 is an excitation schematic diagram of an ac reluctance machine according to an embodiment of the present invention, where U is zero current, V is negative current, and W is positive current.
Fig. 6 is an excitation schematic diagram of an ac reluctance machine according to an embodiment of the present invention, where U is a positive current, V is a negative current, and W is a positive current.
Fig. 7 is an excitation schematic diagram of an ac reluctance machine according to an embodiment of the present invention, where U is a positive current, V is a negative current, and W is a zero current.
The meanings of the labels in the figures are: 10-stator core, 11-teeth, 11 a-tooth crest, 12-stator slot, 20-winding, 30-rotor core, 31-yoke, 32-salient pole, 32 a-pole top, 33-empty slot, 34-outer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by the following embodiments with reference to fig. 1-7. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The utility model aims to improve the winding arrangement of the existing motor, the winding installation operation is simple, the number of outgoing line heads can be reduced, and the wiring is simple. Based on this, the present invention provides an ac reluctance motor, referring to fig. 1, the ac reluctance motor of the present invention includes a stator core, a winding and a rotor core, the stator core includes teeth and stator slots alternately arranged according to the conventional switched reluctance motor, the number of the teeth and the stator slots is m, m is a multiple of 3, and the preferred value is m is 6,12, 18; the winding is required to be 3-phase distributed, each phase of winding comprises m/3 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two coil sides of different phases are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width, a smaller slot wedge can be used, even the slot wedge is not used for fixing the winding, and the installation process of the winding is simplified; the rotor core comprises a rotor yoke portion, salient poles and empty slots, the salient poles are arranged along the circumferential direction of the rotor yoke portion, the empty slots are formed between the adjacent salient poles, and the circumferential width of the tops of the empty slots is larger than that of the tops of the salient poles, so that the magnetic resistance of the salient poles is far smaller than that of the empty slots. In the utility model, the circumferential width of the tops of the empty slots is based on the circumference of the ends of all the empty slots far away from the center of the rotor core, and the circumferential width of the tops of the salient poles is based on the circumference of the ends of all the salient poles far away from the center of the rotor core.
By adopting the structure, when three-phase alternating current is conducted to the three-phase winding, the number of the excitation poles is m/3, 3 slots and 6 coil sides are arranged in any polar distance, referring to an excitation schematic diagram of fig. 5-7, 4 coil sides of two-phase windings are equidirectional current to mutually enhance excitation, two coil sides of the other-phase winding are opposite-directional current to mutually offset excitation, and at any time, all slot currents are not zero, so that the main pole is excited alternately by a single tooth, and the principle is consistent with that the main pole is excited alternately by a single tooth of a switched reluctance motor, therefore, the switched reluctance motor can be applied to the switched reluctance motor, and further, the switched reluctance motor is directly driven by an alternating current power supply. And do not adopt utility model winding structure's other alternating current motor's three-phase distributed winding, arbitrary coil all strides the multislot setting, lead to tip length overlength, increase coil end loss, a groove sets up a looks coil limit, the coil current is zero for zero slot current, the tooth of this groove both sides all excites for the main pole, what the main pole realized is that the multiple tooth excites in turn, with the principle that switched reluctance motor main pole monodentate excited in turn is not accorded with, so its winding setting mode can not directly be applied to switched reluctance motor.
In some preferred embodiments, the number of the salient poles and the number of the empty slots may be set to be m/3, in which case, steps for increasing a tip air gap are provided on both sides of a tip of the tooth, steps for increasing a tip air gap are provided on both sides of a tip of the salient pole, and a tip circumferential width of the salient pole is greater than or equal to the tip circumferential width of the tooth. In the utility model, the circumferential width of the tooth top is calculated by taking the circumference of the end part of all the teeth close to the circle center of the stator core as a reference. The number of the salient poles and the empty slots is less than that of the traditional switched reluctance motor, so that torque pulsation and switching efficiency loss can be effectively reduced, and a magnetic circuit can be ensured not to be reduced by enabling the circumferential width of the pole tops of the salient poles to be larger than or equal to that of the tooth tops of the teeth, so that the magnetic conduction efficiency of the motor is ensured; and through setting up the ladder, increase the air gap between utmost point top and the tooth, form more even variable inductance and variable reluctance, also be in order to guarantee switched reluctance motor normal operating to reduce switched reluctance motor torque ripple.
In some preferred embodiments, the numbers of the salient poles and the empty slots may be 2m/3, that is, the same as the tooth ratio of a stator and a rotor of a conventional three-phase switched reluctance motor, in which case, steps for increasing the tooth top air gap are provided on both sides of the tooth tops of the teeth, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole tops of the salient poles, the circumferential widths of the pole tops of the salient poles are greater than or equal to the circumferential widths of the tooth tops of the teeth, and the minimum radial thickness of the outer ring is less than 1/5 of the circumferential widths of the pole tops of the salient poles. Through setting up the outer ring, make the rotor core outside form a complete round face, compare ordinary salient pole structure, conveniently control the air gap between the stator and the rotor through the turning, can also reduce the windage loss because of reducing fan effect to improve motor efficiency. The utility model also limits the minimum radial thickness of the outer ring, and aims to ensure that the salient pole reluctance is far smaller than the empty slot reluctance and the normal operation of the motor.
In some preferred embodiments, in the case where the number of the salient poles and the empty slots are both m/3, the structure is also allowed to be: the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole tops of the salient poles, the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the tooth tops of the teeth, and the radial minimum thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole tops of the salient poles. Through setting up the outer ring, compare ordinary salient pole structure, made things convenient for the air gap between the turning control stator and rotor, can also reduce the windage loss because of reducing the fan effect to improve motor efficiency. The utility model also limits the minimum radial thickness of the outer ring, and aims to ensure that the salient pole reluctance is far smaller than the empty slot reluctance and the normal operation of the motor.
Example 1
The alternating current reluctance motor comprises a stator core, a winding and a rotor core, wherein the stator core comprises alternately arranged teeth and stator slots according to the traditional switched reluctance motor, and the number of the teeth and the stator slots is 12; the winding mode of the winding is shown in figure 1, the winding is a 3-phase distributed winding, identified as U, V, W phases in the figure, each phase of winding comprises 4 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two coil sides of different phases are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width; the rotor core comprises a rotor yoke portion, salient poles and empty slots, the salient poles are arranged along the circumferential direction of the rotor yoke portion, the empty slots are formed between the adjacent salient poles, and the circumferential width of the tops of the empty slots is larger than that of the tops of the salient poles, so that the magnetic resistance of the salient poles is far smaller than that of the empty slots.
Referring to fig. 2, in the embodiment, the number of the salient poles and the empty slots is 4, steps for increasing the tooth top air gap are arranged on two sides of the tooth top of each tooth, steps for increasing the pole top air gap are arranged on two sides of the pole top of each salient pole, and the circumferential width of the pole top of each salient pole is greater than or equal to the circumferential width of the tooth top of each tooth. The number of the salient poles and the empty slots is set to be less than that of the traditional switched reluctance motor, so that torque pulsation and switching efficiency loss can be effectively reduced, and the magnetic circuit can be ensured not to be reduced by setting the circumferential width of the pole tops of the salient poles to be greater than or equal to the circumferential width of the tooth tops of the teeth, so that the magnetic flux efficiency of the motor is ensured, and the normal operation of the motor is ensured; and through setting up the ladder, increase the air gap between utmost point top and the tooth, form more even variable inductance and variable reluctance, also be in order to guarantee switched reluctance motor normal operating to reduce switched reluctance motor torque ripple.
Example 2
The alternating current reluctance motor comprises a stator core, a winding and a rotor core, wherein the stator core comprises alternately arranged teeth and stator slots according to the traditional switched reluctance motor, and the number of the teeth and the stator slots is 12; winding mode of the winding is shown in figure 1, the winding is a 3-phase distributed winding, which is marked as U, V, W phases in the figure, each phase of winding comprises 4 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two different-phase coil sides are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width; the rotor core comprises a rotor yoke portion, salient poles and empty slots, the salient poles are arranged along the circumferential direction of the rotor yoke portion, the empty slots are formed between the adjacent salient poles, and the circumferential width of the tops of the empty slots is larger than that of the tops of the salient poles, so that the magnetic resistance of the salient poles is far smaller than that of the empty slots.
Referring to fig. 3, in this embodiment, the number of the salient poles and the empty slots is 8, that is, the number of the teeth of the stator and the rotor is the same as that of the conventional three-phase switched reluctance motor, steps for increasing the tooth crest air gap are arranged on two sides of the tooth crest of the tooth, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole top of each salient pole, the radial minimum thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole top of the salient pole, and the circumferential width of the pole top of the salient pole is greater than or equal to the circumferential width of the tooth crest of the tooth.
Example 3
The alternating current reluctance motor comprises a stator core, a winding and a rotor core, wherein the stator core comprises teeth and stator slots which are alternately arranged according to the traditional switched reluctance motor, and the number of the teeth and the stator slots is 12; winding mode of the winding is shown in figure 1, the winding is a 3-phase distributed winding, which is marked as U, V, W phases in the figure, each phase of winding comprises 4 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two different-phase coil sides are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width; the rotor core comprises a rotor yoke portion, salient poles and empty slots, the salient poles are arranged along the circumferential direction of the rotor yoke portion, the empty slots are formed between the adjacent salient poles, and the circumferential width of the tops of the empty slots is larger than that of the tops of the salient poles, so that the magnetic resistance of the salient poles is far smaller than that of the empty slots.
Referring to fig. 4, in the present embodiment, the number of the salient poles and the empty slots is 4, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected to the pole tops of the salient poles, the minimum radial thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole tops of the salient poles, and the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the tooth crests of the teeth.
The utility model is not limited to the specific embodiments and examples shown, but rather, it is to be understood that all modifications and variations may be made without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. An alternating current reluctance machine characterized by: the alternating current reluctance motor comprises a stator core, a winding and a rotor core, wherein the stator core comprises teeth and stator slots which are alternately arranged, the number of the teeth and the number of the stator slots are m, and m is a multiple of 3; the winding is a 3-phase distributed winding, each phase of winding comprises m/3 coils, and the number of turns of each coil is more than or equal to 1; two coil sides of any coil are respectively wound in the other two stator slots at intervals of one stator slot, the three-phase windings are alternately arranged, and two different-phase coil sides are arranged in any stator slot; the stator slot is a semi-closed slot, namely the tooth top width is larger than the tooth body width; rotor core includes rotor yoke portion, salient pole and dead slot, the salient pole sets up along rotor yoke portion circumference, forms the dead slot between the adjacent salient pole, just the groove top circumference width of dead slot is greater than the utmost point top circumference width of salient pole makes salient pole magnetic resistance far less than the dead slot magnetic resistance.
2. An ac reluctance machine according to claim 1, wherein: the number of the salient poles and the number of the empty grooves are m/3, steps for increasing tooth top air gaps are arranged on two sides of tooth tops of the teeth, steps for increasing pole top air gaps are arranged on two sides of pole tops of the salient poles, and the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the tooth tops of the teeth.
3. An alternating current reluctance machine according to claim 1, wherein: the salient poles and the empty slots are 2m/3 in number, steps for increasing an addendum air gap are arranged on two sides of the addendum of each tooth, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole tops of the salient poles, the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the addendum of each tooth, and the radial minimum thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole tops of the salient poles.
4. An ac reluctance machine according to claim 1, wherein: the number of the salient poles and the empty slots is m/3, the rotor core is further provided with an outer ring, the outer ring is coaxial with the rotor core and fixedly connected with the pole tops of the salient poles, the circumferential width of the pole tops of the salient poles is larger than or equal to the circumferential width of the tooth tops of the teeth, and the radial minimum thickness of the outer ring is smaller than 1/5 of the circumferential width of the pole tops of the salient poles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220870305.8U CN217036852U (en) | 2022-04-15 | 2022-04-15 | Alternating current reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220870305.8U CN217036852U (en) | 2022-04-15 | 2022-04-15 | Alternating current reluctance motor |
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| CN217036852U true CN217036852U (en) | 2022-07-22 |
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| CN202220870305.8U Active CN217036852U (en) | 2022-04-15 | 2022-04-15 | Alternating current reluctance motor |
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