CN217010459U - Self-starting synchronous reluctance motor rotor and self-starting synchronous reluctance motor - Google Patents
Self-starting synchronous reluctance motor rotor and self-starting synchronous reluctance motor Download PDFInfo
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- CN217010459U CN217010459U CN202220213548.4U CN202220213548U CN217010459U CN 217010459 U CN217010459 U CN 217010459U CN 202220213548 U CN202220213548 U CN 202220213548U CN 217010459 U CN217010459 U CN 217010459U
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Abstract
The utility model provides a self-starting synchronous reluctance motor rotor and a self-starting synchronous reluctance motor, wherein the self-starting synchronous reluctance motor rotor comprises: the rotor core is provided with an air groove to form a magnetic barrier layer, and a magnetic conduction channel is arranged between two adjacent magnetic barrier layers; the magnetic conduction channel comprises a parallel part section parallel to the D axis and a non-parallel part section not parallel to the D axis, and the width of the non-parallel part section along the radial direction of the rotor core is WRAnd in the non-parallel subsections of the same magnetic conduction channel, the width of the widest part of the non-parallel subsections is WRmaxIs not parallel toThe narrowest part of the partial section has a width WRminAnd is combined with | WRmax‑WRminLess than or equal to 20 mm; and
according to the utility model, the magnetic resistance of the magnetic circuit is ensured to be uniform when the magnetic circuit passes through each layer of magnetic conduction channel, and local saturation or early saturation is avoided, so that the rated load and the heavy load performance of the motor are improved, the overload capacity is improved, and the torque output, the overload capacity and the overall efficiency are improved.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a self-starting synchronous reluctance motor rotor and a self-starting synchronous reluctance motor.
Background
The self-starting synchronous reluctance motor has the characteristics of both an asynchronous motor and a synchronous reluctance motor, and has the following basic characteristics:
an air groove is formed in the rotor along the axial direction, the air groove is called a magnetic barrier groove, and an iron core part formed between every two layers of magnetic barrier grooves is called a magnetic conduction channel;
the magnetic barrier grooves are completely or partially filled with conductive and non-magnetic conductive materials (such as aluminum) and are called conducting bars;
end rings are arranged at two axial ends of the rotor, the material of the end rings is the same as that of the conducting bars, and the end rings at the two ends of the rotor are connected with all or part of the conducting bars in the rotor groove to form a short circuit loop;
the self-starting synchronous reluctance motor has the advantages that the asynchronous motor can be directly started without a frequency converter, the rotor does not have magnetic steel, and the reliability is high, and the synchronous reluctance motor stably runs in synchronization, high efficiency and high power density. In the industrial field, the fixed frequency motor IE4 is a breakthrough in energy efficiency and is lower in cost.
The self-starting synchronous reluctance motor rotor is provided with a plurality of layers of air grooves, the middle parts of two adjacent air grooves are magnetic conduction channels, the magnetic conduction channels start from the part parallel to the D axis, pass through the part not parallel to the D axis (the part is vertical to the Q axis when passing through the Q axis, or the tangent line of the circular arc is vertical to the Q axis), and finally end at the part parallel to the D axis and symmetrical about the starting part.
Because the D-axis magnetic circuit is not limited by the shaft hole, the Q-axis magnetic circuit is limited by the shaft hole, and the available space of the two magnetic conduction channels is limited, the Q-axis magnetic conduction channel is far away from the D axis relative to the D-axis magnetic conduction channel, and the Q-axis magnetic conduction channel is narrower.
The magnetic conduction channel is the main part of the main magnetic circuit of the motor in the rotor, and the width of the magnetic conduction channel, the distribution of each layer of magnetic conduction channel and the transition smoothness of the D shaft part and the Q shaft part of each layer of magnetic conduction channel can influence the torque output, the overload capacity and the efficiency of the motor.
The utility model researches and designs a self-starting synchronous reluctance motor rotor and a self-starting synchronous reluctance motor, because the self-starting synchronous reluctance motor in the prior art has the technical problems of small torque output, small overload capacity, low overall efficiency and the like.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the defects of small torque output, small overload capacity and low overall efficiency of the self-starting synchronous reluctance motor in the prior art, thereby providing a self-starting synchronous reluctance motor rotor and a self-starting synchronous reluctance motor.
In order to solve the above problems, the present invention provides a self-starting synchronous reluctance motor rotor, comprising:
the rotor comprises a rotor core, wherein the rotor core is provided with an air groove to form a magnetic barrier layer, and a magnetic conduction channel is arranged between two adjacent magnetic barrier layers; the magnetic conduction channel comprises a parallel part section parallel to the D axis and a non-parallel part section which is not parallel to the D axis, and the width of the non-parallel part section along the radial direction of the rotor core is WRAnd in the non-parallel subsections of the same magnetic conduction channel, the width of the widest part of the non-parallel subsections is WRmaxThe width of the narrowest part of the non-parallel partial segments is WRminAnd is combined with | WRmax-WRminLess than or equal to 20 mm; and
in some embodiments, the width of each parallel segment in the same magnetic conduction channel is equal.
In some embodiments, in the same magnetic conduction channel, the positions where the parallel sub-sections and the non-parallel sub-sections meet are rounded.
In some embodiments, in the same magnetic conduction channel, the position where the parallel sub-section meets the non-parallel sub-section is a non-rounded transition structure.
In some embodiments, in the magnetic conduction channel, the non-parallel section includes a Q-axis magnetic conduction section located at the Q-axis, the non-parallel section further includes a transition section, one end of the transition section is connected to the Q-axis magnetic conduction section, the other end of the transition section is connected to the parallel section, and the transition section is in an arc-shaped structure.
In some embodiments, in the magnetic conduction channel, the non-parallel section includes a Q-axis magnetic conduction section located at the Q-axis, the non-parallel section further includes a transition section, one end of the transition section is connected to the Q-axis magnetic conduction section, the other end of the transition section is connected to the parallel section, and the transition section is a multi-section segmented structure.
In some embodiments, the rotor core is formed by axially stacking rotor laminations.
In some embodiments, the magnetic barrier layer is filled with an electrically and magnetically conductive material, i.e., conductive strips.
In some embodiments, end rings made of an electrically and magnetically non-conductive material are disposed at both axial ends of the rotor core, and all or part of the bars are shorted together by the end rings to form a loop.
The utility model also provides a self-starting synchronous reluctance motor which comprises the self-starting synchronous reluctance motor rotor.
The self-starting synchronous reluctance motor rotor and the self-starting synchronous reluctance motor provided by the utility model have the following beneficial effects:
in the utility model, the non-parallel part section of the same magnetic conduction channel is passed throughThe partial segments are not of equal width, the widest part of which has a width WRmaxThe width of the narrowest portion is WRminAnd is combined with | WRmax-WRminLess than or equal to 20 mm; and
the magnetic conduction channel maximum width and minimum width relation can be restrained, the magnetic conduction channel maximum width and minimum width are restrained in the specific range, the width of the whole magnetic conduction channel from the initial section to the final section is effectively ensured to be uniform, the magnetic resistance is ensured to be uniform when a magnetic circuit passes through each layer of magnetic conduction channel, the local saturation or the saturation in advance is avoided, the rated load and the heavy load performance of the motor are improved, the overload capacity is improved, and the torque output, the overload capacity and the overall efficiency are improved.
Drawings
FIG. 1 is a schematic view of a magnetic barrier and a magnetic conduction channel of a self-starting synchronous reluctance motor rotor according to the present invention;
FIG. 2 is a detailed structural view of a magnetic conduction channel portion of a self-starting synchronous reluctance motor rotor of the present invention;
FIG. 3 is a schematic width view of a magnetic conduction channel of a self-starting synchronous reluctance motor rotor according to the present invention;
FIG. 4 is a graph comparing torque output/overload capacity of the motor of the present invention with a conventional motor;
fig. 5 is a graph comparing efficiency of the motor of the present invention with that of the conventional motor.
The reference numerals are represented as:
1. a rotor core; 2. a magnetic barrier layer; 3. a magnetic conduction channel; 31. a parallel portion segment; 32. a non-parallel partial segment; 33. a Q-axis magnetic conduction section; 34. a transition section.
Detailed Description
As shown in fig. 1 to 5, the present invention provides a self-starting synchronous reluctance motor rotor, which includes:
the magnetic flux sensor comprises a rotor core 1, wherein an air groove is formed in the rotor core 1 to form magnetic barrier layers 2, and a magnetic conduction channel 3 is arranged between every two adjacent magnetic barrier layers 2; high magnetic permeability with D axis direction and low magnetic conductivityThe magnetic rate direction is a Q axis; two adjacent rotor poles are symmetrical about a D axis, and the same pole is symmetrical about a Q axis; according to the shape of the magnetic barrier layer 2, a D axis is an axis parallel to the magnetic barrier layer in the radial direction of the rotor iron core, and a Q axis is an axis perpendicular to the magnetic barrier layer in the radial direction of the rotor iron core; the magnetic barrier layer 2 has a plurality of layers along the Q axis, the magnetic conduction channel 3 includes a parallel segment 31 parallel to the D axis and a non-parallel segment 32 not parallel to the D axis, and the width of the non-parallel segment 32 along the radial direction of the rotor core 1 is WRAnd in the non-parallel subsections 32 of the same magnetic conduction channel 3, the width of the widest part of the non-parallel subsections 32 is WRmaxThe narrowest part of the non-parallel partial section 32 has a width WRminAnd is merged with | WRmax-WRminLess than or equal to 20 mm; and
in the non-parallel partial sections of the same magnetic conduction channel, the non-parallel partial sections are not of equal width, and the width of the widest part is WRmaxThe width of the narrowest part is WRminAnd is merged with | WRmax-WRminThe | < 20 mm; and
the magnetic conduction channel maximum width and minimum width relation can be restrained, the magnetic conduction channel maximum width and minimum width are restrained in the specific range, the width of the whole magnetic conduction channel from the initial section to the final section is effectively ensured to be uniform, the magnetic resistance is ensured to be uniform when a magnetic circuit passes through each layer of magnetic conduction channel, the local saturation or the saturation in advance is avoided, the rated load and the heavy load performance of the motor are improved, the overload capacity is improved, and the torque output, the overload capacity and the overall efficiency are improved.
The utility model ensures that the width of the whole magnetic conduction channel is uniform from the initial section to the final section by setting the width of the magnetic conduction channel and restricting the relation between the maximum width and the minimum width of the magnetic conduction channel, thereby improving the torque output, the overload capacity and the efficiency of the whole machine.
1. Defining the width of a magnetic conduction channel, and constraining the ratio of the maximum width to the minimum width of the magnetic conduction channel and the maximum difference value of the maximum width to the minimum width;
and 2. the D-axis magnetic conduction channel is parallel to the D axis.
In some embodiments, the width of each parallel segment 31 in the same magnetic conduction channel 3 is equal. Set up to the width homogeneous phase through the parallel part section with same magnetic conduction passageway and can equalize each magnetic circuit effectively to make the magnetic field homoenergetic between each magnetic circuit size equal, make the magnetic field distribution on the whole rotor even, further ensure that the magnetic circuit is when passing through each layer magnetic conduction passageway, the magnetic resistance is even, avoids appearing local saturation or saturates in advance, thereby promotes motor rated load and heavy load performance, promotes the overload capacity.
1. Rotor magnetic barrier: each layer of air groove is arranged on the rotor;
2. a rotor magnetic conduction channel: the part between each layer of air slot of the rotor is called a magnetic conduction channel layer;
3. conducting strip: the rotor air groove is filled with conductive non-magnetic materials;
4. end ring: two ends of the rotor are arranged, are made of the same material as the conducting bars and are in short circuit with the rotor conducting bars to form a loop;
5. d-axis magnetic tunnel (parallel segment 31): the part of the magnetic conduction channel parallel to the D axis;
6. q-axis magnetic conduction path (Q-axis magnetic conduction section 33): the part of the magnetic conduction channel which is not parallel to the D axis and is parallel to the Q axis.
In some embodiments, in the same magnetic conduction channel 3, the positions where the parallel sub-sections 31 meet the non-parallel sub-sections 32 are in a rounded transition structure. The utility model can ensure that the magnetic circuit can generate smooth natural transition when entering the non-parallel part section through the parallel part section or entering the parallel part section through the non-parallel part section by setting the joint of the parallel part section and the non-parallel part section into a smooth transition structure, thereby preventing the situation of larger magnetic resistance and reducing the magnetic flux loss.
1. The non-parallel D-axis portion, the width WR in the radial direction,the partial magnetic conduction channels are not of equal width, and the widest part W of each layer of magnetic conduction channelrmaxNarrowest part Wrmin，|WRmax-WRmin|≤20mm；
2, the width of the D-axis magnetic conduction channel (the parallel part section 31) is equal;
3. smooth transition or non-smooth transition is adopted from the parallel D shaft part (parallel part section 31) to the non-parallel D shaft part (non-parallel part section 32) of each layer of magnetic conduction channel;
above ensure that the magnetic circuit when passing through each layer magnetic conduction passageway, the magnetic resistance is even, avoids appearing local saturation or saturation in advance to promote motor rated load and heavy load performance, promote the overload capacity.
In some embodiments, in the same magnetic conduction channel 3, the positions where the parallel sub-sections 31 meet the non-parallel sub-sections 32 are in a non-round transition structure. The utility model can ensure the normal circulation function of the magnetic circuit by arranging the non-smooth transition structure at the joint of the parallel part section and the non-parallel part section.
In some embodiments, in the magnetic conduction channel 3, the non-parallel section 32 includes a Q-axis magnetic conduction section 33 located at the Q-axis, the non-parallel section 32 further includes a transition section 34, one end of the transition section 34 is connected to the Q-axis magnetic conduction section 33, the other end is connected to the parallel section 31, and the transition section 34 is in a circular arc structure. The utility model also can form a smooth magnetic flux flow path by arranging the transition section between the Q-axis magnetic conduction section and the non-parallel partial section in a circular arc structure, thereby preventing the situation of larger magnetic resistance and reducing the magnetic flux loss.
In some embodiments, in the magnetic conduction channel 3, the non-parallel section 32 includes a Q-axis magnetic conduction section 33 located at the Q-axis, the non-parallel section 32 further includes a transition section 34, one end of the transition section 34 is connected to the Q-axis magnetic conduction section 33, the other end is connected to the parallel section 31, and the transition section 34 is a multi-segment structure. The utility model also sets the transition section between the Q-axis magnetic conduction section and the non-parallel section in the non-parallel section as a multi-section structure to form a smooth magnetic flux flow path, thereby preventing the situation of large magnetic resistance and reducing the magnetic flux loss.
In some embodiments, the rotor core 1 is formed by axially stacking rotor laminations; the number of groups of the magnetic barrier layer 2 is the number of poles of the motor rotor, and as shown in the figure of the disclosure, comprises an upper pole and a lower pole which are 2 poles in total above the D axis and below the D axis.
In some embodiments, the magnetic barrier layer 2 is filled with an electrically and magnetically conductive material, i.e., conductive strips.
Preferably, the conducting bar is of a cast aluminum structure and is formed in the filling groove in a casting mode.
In some embodiments, end rings made of an electrically and magnetically non-conductive material are disposed at two axial ends of the rotor core 1, and all or part of the bars are shorted together by the end rings to form a loop.
The motor is a rotor core formed by axially stacking rotor punching sheets;
the rotor iron core is provided with a plurality of groups of identical air slots, and the number of the groups of the air slots is the number of rotor poles;
each layer of air groove on the rotor is called a magnetic barrier layer 2, and the part between two adjacent layers of air grooves is called a magnetic conduction channel 3;
all the air slots are filled with conductive and non-conductive material called conducting bars (not shown);
end rings (not shown) made of an electrically and magnetically non-conductive material are placed at both ends of the rotor;
all or part of the conducting bars are in short circuit together through an end ring to form a loop;
the air grooves are divided into a plurality of layers along the axis Q, the radial direction parallel to the air grooves is called the axis D according to the shape of the air grooves, and the radial direction vertical to the air grooves is called the axis Q;
each layer of magnetic conduction channel is divided into two parts, one part is a parallel D shaft part (parallel part section 31), and the other part is a non-parallel D shaft part (non-parallel part section 32).
The utility model also provides a self-starting synchronous reluctance motor which comprises the self-starting synchronous reluctance motor rotor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be also considered as the protection scope of the present invention.
Claims (10)
1. A self-starting synchronous reluctance machine rotor characterized in that: the method comprises the following steps:
the magnetic flux shield comprises a rotor iron core (1), wherein an air groove is formed in the rotor iron core (1) to form a magnetic barrier layer (2), and a magnetic conduction channel (3) is arranged between two adjacent magnetic barrier layers (2); the magnetic conduction channel (3) comprises a parallel part section (31) parallel to the D axis and a non-parallel part section (32) not parallel to the D axis, and the width of the non-parallel part section (32) along the radial direction of the rotor iron core (1) is WRAnd in the non-parallel subsections (32) of the same magnetic conduction channel (3), the width of the widest part of the non-parallel subsections (32) is WRmaxThe narrowest part of the non-parallel partial section (32) has a width WRminAnd is combined with | WRmax—WRminLess than or equal to 20 mm; and
2. the self-starting synchronous reluctance machine rotor of claim 1, wherein:
the widths of the parallel subsections (31) in the same magnetic conduction channel (3) are all equal.
3. The self-starting synchronous reluctance machine rotor of claim 2, wherein:
in the same magnetic conduction channel (3), the position where the parallel subsection (31) is connected with the non-parallel subsection (32) is in a smooth transition structure.
4. The self-starting synchronous reluctance machine rotor of claim 1, wherein:
in the same magnetic conduction channel (3), the connection position of the parallel subsection (31) and the non-parallel subsection (32) is in a non-round transition structure.
5. The self-starting synchronous reluctance machine rotor of claim 1, wherein:
in the magnetic conduction channel (3), the non-parallel part section (32) comprises a Q-axis magnetic conduction section (33) located at the Q-axis of the rotor core (1), the non-parallel part section (32) further comprises a transition section (34), one end of the transition section (34) is connected with the Q-axis magnetic conduction section (33), the other end of the transition section is connected with the parallel part section (31), and the transition section (34) is of an arc-shaped structure.
6. The self-starting synchronous reluctance machine rotor of claim 1, wherein:
in the magnetic conduction channel (3), the non-parallel part section (32) comprises a Q-axis magnetic conduction section (33) located at the Q-axis of the rotor core (1), the non-parallel part section (32) further comprises a transition section (34), one end of the transition section (34) is connected with the Q-axis magnetic conduction section (33), the other end of the transition section is connected with the parallel part section (31), and the transition section (34) is of a multi-section segmented structure.
7. The self-starting synchronous reluctance machine rotor of claim 1, wherein:
the rotor core (1) is formed by axially stacking rotor punching sheets.
8. The self-starting synchronous reluctance machine rotor of claim 1, wherein:
and the magnetic barrier layer (2) is filled with conductive and non-conductive materials, namely conducting bars.
9. The self-starting synchronous reluctance machine rotor of claim 8, wherein:
end rings made of conductive and non-magnetic materials are arranged at two axial ends of the rotor core (1), and all or part of the conducting bars are connected together in a short circuit mode through the end rings to form a loop.
10. A self-starting synchronous reluctance machine characterized by: comprising a self-starting synchronous reluctance machine rotor according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213548.4U CN217010459U (en) | 2022-01-26 | 2022-01-26 | Self-starting synchronous reluctance motor rotor and self-starting synchronous reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213548.4U CN217010459U (en) | 2022-01-26 | 2022-01-26 | Self-starting synchronous reluctance motor rotor and self-starting synchronous reluctance motor |
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| CN217010459U true CN217010459U (en) | 2022-07-19 |
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| CN202220213548.4U Active CN217010459U (en) | 2022-01-26 | 2022-01-26 | Self-starting synchronous reluctance motor rotor and self-starting synchronous reluctance motor |
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