CN111463926A - Novel reduce motor tooth's socket torque structure - Google Patents
Novel reduce motor tooth's socket torque structure Download PDFInfo
- Publication number
- CN111463926A CN111463926A CN202010339137.5A CN202010339137A CN111463926A CN 111463926 A CN111463926 A CN 111463926A CN 202010339137 A CN202010339137 A CN 202010339137A CN 111463926 A CN111463926 A CN 111463926A
- Authority
- CN
- China
- Prior art keywords
- slotted
- punching sheet
- stator
- reducing
- cogging torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a novel structure for reducing motor tooth space torque, which comprises: the stator core is formed by axially and alternately superposing a slotted punching sheet group and a non-slotted punching sheet group, the slotted punching sheet group at least comprises a slotted punching sheet, and the non-slotted punching sheet group at least comprises a non-slotted punching sheet; open slots circumferentially distributed are formed in the slotted punching sheet; and closed grooves which are circumferentially distributed in a surrounding manner are arranged on the non-groove punching sheet, and the closed grooves correspond to the open grooves one by one. The invention reduces the cogging torque of the motor by changing the distribution of the magnetic resistance of the magnetic circuit.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel structure for reducing cogging torque of a motor.
Background
The steering system of the automobile is mostly replaced by eps (electric power steering) for the traditional mechanical or hydraulic system, namely, the electric motor provides the steering assistance. The traditional permanent magnet motor is used as the power of an automobile steering system because the cogging torque is large, the comfort of the operation of a driver is seriously influenced, and a steering wheel cannot be manually rotated when an EPS system fails, so that the EPS steering system puts forward a strict requirement on the cogging torque of the motor. The method for reducing the cogging torque of the motor in the prior art mainly comprises a stator skewed slot, a rotor skewed pole, a fractional slot winding and the like. The stator skewed slots affect stator winding, the winding process is complex, the production efficiency is low, the rotor skewed pole magnetic steel production process is complex, and the fractional slot windings partially offset effective torque components of the motor. Other methods also have the defects of inconvenience, unobvious effect and the like.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a novel structure for reducing the cogging torque of a motor.
The invention provides a novel structure for reducing motor tooth space torque, which comprises: the stator core is formed by axially and alternately superposing a slotted punching sheet group and a non-slotted punching sheet group, the slotted punching sheet group at least comprises a slotted punching sheet, and the non-slotted punching sheet group at least comprises a non-slotted punching sheet; open slots circumferentially distributed are formed in the slotted punching sheet; and closed grooves which are circumferentially distributed in a surrounding manner are arranged on the non-groove punching sheet, and the closed grooves correspond to the open grooves one by one.
Preferably, the slotted punching sheet comprises a slotted stator ring and slotted stator teeth circumferentially annularly distributed on the inner ring surface of the slotted stator ring, and a space is reserved between any two adjacent slotted stator teeth to form an open slot.
Preferably, the slotted stator ring is provided with stator ring riveting holes distributed circumferentially.
Preferably, the slotted stator teeth are provided with tooth part riveting holes.
Preferably, the slotless punching sheet comprises a slotless stator ring and slotless stator teeth which are circumferentially arranged on the inner ring surface of the slotless stator ring, the tooth tops of any two adjacent slotless stator teeth are connected, and a space is reserved between the tooth roots to form a closed groove.
Preferably, the slotless stator ring is provided with stator ring riveting holes distributed circumferentially.
Preferably, the slotless stator teeth are provided with tooth part riveting holes.
According to the stator core structure, the combination of the slotted punching sheet and the non-slotted punching sheet is utilized, so that the open slots on the slotted punching sheet and the closed slots on the non-slotted punching sheet are in one-to-one correspondence to form the slots of the stator core, and different combinations of the slots of the stator core are generated in the axial direction by utilizing the different number of combinations of the slotted punching sheet and the non-slotted punching sheet and the difference of the calibers of the open slots on the slotted punching sheet and the closed slots on the non-slotted punching; meanwhile, the relative angle between the slotted punching sheet set and the non-slotted punching sheet set is rotated to enable the axial leads of the open slot and the closed slot to be staggered, so that the axial leads of the open slot and the closed slot are not on the same straight line, and the effects of changing the distribution of the magnetic resistance of the magnetic circuit and reducing the cogging torque of the motor are achieved.
Compared with the prior art, the invention has the following advantages:
1. the stator iron core is still vertical, so that the problem of difficult winding caused by the stator chute is solved;
2. the cogging torque effect of the motor is improved;
3. the realization process is simple.
Drawings
Fig. 1 is a schematic structural diagram of the slotted punching sheet in a novel structure for reducing the cogging torque of a motor provided by the invention;
FIG. 2 is a schematic structural diagram of the non-slot punching sheet in a novel structure for reducing the cogging torque of a motor provided by the invention;
fig. 3 is a schematic structural diagram of the novel structure for reducing the cogging torque of the motor, in which the open slot and the closed slot are coaxial;
fig. 4 is a schematic structural diagram of the open slot and the closed slot in the novel structure for reducing the cogging torque of the motor, which is provided by the invention, in a non-coaxial state.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
As shown in fig. 1-4, fig. 1 is a schematic structural diagram of the grooved punching sheet in a novel structure for reducing the cogging torque of a motor provided by the invention; FIG. 2 is a schematic structural diagram of the non-slot punching sheet in a novel structure for reducing the cogging torque of a motor provided by the invention; fig. 3 is a schematic structural diagram of the novel structure for reducing the cogging torque of the motor, in which the open slot and the closed slot are coaxial; the open groove and the closed groove in the novel structure for reducing the cogging torque of the motor are in a structural schematic diagram under a non-coaxial state.
Referring to fig. 1-2, the present invention provides a novel structure for reducing cogging torque of a motor, including: the method comprises the following steps: the stator core is formed by axially and alternately superposing a slotted punching sheet group and a non-slotted punching sheet group, the slotted punching sheet group at least comprises a slotted punching sheet 1, and the non-slotted punching sheet group at least comprises a non-slotted punching sheet 2; the slotted punching sheet 1 is provided with open slots a which are circumferentially distributed; and closed grooves b which are circumferentially distributed in a surrounding manner are arranged on the non-groove punching sheet 2, and the closed grooves b correspond to the open grooves a one by one.
Referring to fig. 3-4, the invention uses the combination of the slotted punching sheet 1 and the non-slotted punching sheet 2 to make the open slot a on the slotted punching sheet 1 and the closed slot b on the non-slotted punching sheet 2 correspond to each other one by one to form the slot opening of the stator core, so that different combinations of the slot opening of the stator core in the axial direction are generated by using different numbers of the combination of the slotted punching sheet 1 and the non-slotted punching sheet 2 and the difference of the caliber size of the closed slot b on the slot opening a and the non-slotted punching sheet 2, and the axial leads of the open slot a and the closed slot b are dislocated (the dislocated angle is α in fig. 4) by rotating the relative angle between the slotted punching sheet group and the non-slotted punching sheet group, so that the axial leads of the open slot a and the closed slot b are not on the same straight line.
In addition, in the present embodiment, the slotted punching sheet 1 includes a slotted stator ring 11 and slotted stator teeth 12 circumferentially annularly arranged on an inner ring surface of the slotted stator ring 11, and a space is reserved between any two adjacent slotted stator teeth 12 to form an open slot a. The slotless punching sheet 2 comprises a slotless stator ring 21 and slotless stator teeth 22 which are circumferentially arranged on the inner ring surface of the slotless stator ring 21, the tooth tops of any two adjacent slotless stator teeth 22 are connected, and a space is reserved between the tooth roots to form a closed groove b.
In this embodiment, the slotted stator ring 11 and the non-slotted punching sheet 21 are respectively provided with stator ring riveting holes c circumferentially distributed. Each of the slotted stator teeth 12 and the non-slotted stator teeth 22 is provided with a tooth riveting hole d. And riveting the slotted punching sheet 1 and the non-slotted punching sheet 2 after the slotted punching sheet 1 and the non-slotted punching sheet 2 are superposed by utilizing the stator ring riveting hole c and the tooth part riveting hole d.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a novel reduce motor tooth's socket torque structure which characterized in that includes: the stator core is formed by axially and alternately superposing a slotted punching sheet group and a non-slotted punching sheet group, the slotted punching sheet group at least comprises a slotted punching sheet (1), and the non-slotted punching sheet group at least comprises a non-slotted punching sheet (2); open grooves (a) which are circumferentially distributed are formed in the slotted punching sheet (1); the non-groove punching sheet (2) is provided with closed grooves (b) which are circumferentially distributed in a surrounding manner, and each closed groove (b) corresponds to each open groove (a) one by one.
2. The novel structure for reducing the cogging torque of the motor according to claim 1, wherein the slotted punching sheet (1) comprises a slotted stator ring (11) and slotted stator teeth (12) circumferentially annularly distributed on an inner ring surface of the slotted stator ring (11), and a space is reserved between any two adjacent slotted stator teeth (12) to form an open slot (a).
3. The structure for reducing the cogging torque of the motor according to claim 2, wherein the slotted stator ring (11) is provided with circumferentially distributed stator ring riveting holes (c).
4. The structure for reducing the cogging torque of the motor according to claim 2, wherein the slotted stator teeth (12) are provided with tooth riveting holes (d).
5. The novel structure for reducing the cogging torque of the motor according to claim 1, wherein the slotless punching sheet (2) comprises a slotless stator ring (21) and slotless stator teeth (22) circumferentially arranged on the inner ring surface of the slotless stator ring (21), and the tooth tops of any two adjacent slotless stator teeth (22) are connected, and a space is reserved between the tooth roots to form a closed groove (b).
6. The structure for reducing the cogging torque of the motor according to claim 5, wherein the non-slotted stator ring (21) is provided with circumferentially distributed stator ring riveting holes (c).
7. The structure for reducing the cogging torque of a motor according to claim 5, wherein the non-slot stator teeth (22) are provided with tooth riveting holes (d).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339137.5A CN111463926A (en) | 2020-04-26 | 2020-04-26 | Novel reduce motor tooth's socket torque structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010339137.5A CN111463926A (en) | 2020-04-26 | 2020-04-26 | Novel reduce motor tooth's socket torque structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111463926A true CN111463926A (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010339137.5A Pending CN111463926A (en) | 2020-04-26 | 2020-04-26 | Novel reduce motor tooth's socket torque structure |
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| Country | Link |
|---|---|
| CN (1) | CN111463926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114640191A (en) * | 2021-12-24 | 2022-06-17 | 西南技术物理研究所 | Permanent magnet motor with stator teeth changing alternately |
-
2020
- 2020-04-26 CN CN202010339137.5A patent/CN111463926A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114640191A (en) * | 2021-12-24 | 2022-06-17 | 西南技术物理研究所 | Permanent magnet motor with stator teeth changing alternately |
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