CN113131636A - Novel built-in permanent magnet synchronous motor structure - Google Patents
Novel built-in permanent magnet synchronous motor structure Download PDFInfo
- Publication number
- CN113131636A CN113131636A CN202110416692.8A CN202110416692A CN113131636A CN 113131636 A CN113131636 A CN 113131636A CN 202110416692 A CN202110416692 A CN 202110416692A CN 113131636 A CN113131636 A CN 113131636A
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- Prior art keywords
- rotor
- permanent magnet
- slots
- motor
- magnetic circuit
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- 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
- H02K1/16—Stator cores with slots for windings
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention provides a novel built-in permanent magnet synchronous motor structure, which belongs to the technical field of motor structures, wherein the motor adopts an outer stator and inner rotor 8-pole structure, 48 slots of a stator are formed, auxiliary slots are additionally arranged on stator teeth, 36 slots are formed in the outer side of the rotor, rotor guide bars are embedded in the slots, 8 silicon steel water pipes are placed on the inner side of the rotor, permanent magnets are built-in and embedded in the rotor, each pole of permanent magnet is a V-shaped magnetic circuit, and each pole of magnetic circuit comprises a magnet isolating bridge and a magnet assisting bridge. The problems that the running power of the existing built-in permanent magnet synchronous motor is unstable during speed regulation, the speed regulation range is small, the motor is difficult to start, the efficiency is reduced due to overhigh temperature during the running of the motor, the permanent magnet is irreversibly demagnetized and the like are solved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel built-in permanent magnet synchronous motor structure.
Background
The built-in permanent magnet synchronous motor is a controllable alternating current synchronous motor which appears along with the development of the permanent magnet motor, a stator of the built-in permanent magnet synchronous motor adopts a tooth space structure, and a rotor of the built-in permanent magnet synchronous motor adopts a built-in permanent magnet structure. The built-in permanent magnet synchronous motor has the advantages of simple structure, small volume, large torque density, high efficiency and the like, is widely applied to various engineering fields, and is an energy-saving environment-friendly motor with good development prospect.
However, the speed regulation range of the interior permanent magnet synchronous motor is limited, which causes the motor to be difficult to stably run at the rated rotating speed, the interior permanent magnet synchronous motor is complicated to start, which causes the motor to be in the rated state only in a long time when being started every time, the application of the motor in a system needing frequent starting is limited, in addition, the motor efficiency is reduced and the demagnetization of the permanent magnet is also a common problem caused by poor heat dissipation of the motor, and the defects limit the further development of the interior permanent magnet motor.
Disclosure of Invention
The invention aims to provide a novel built-in permanent magnet synchronous motor structure to solve the problems of unstable running power, small speed regulation range, difficult starting of a motor, efficiency reduction caused by overhigh temperature during the running of the motor, irreversible demagnetization of a permanent magnet and the like of the existing built-in permanent magnet synchronous motor during the speed regulation.
In order to achieve the aim, the invention adopts the technical scheme that: the invention provides a novel built-in permanent magnet synchronous motor structure which is characterized in that the motor adopts an outer stator and inner rotor 8-pole structure, 48 slots of a stator are formed, auxiliary slots are additionally arranged on stator teeth, 36 slots are formed in the outer side of the rotor, rotor guide bars are embedded in the slots, 8 silicon steel water pipes are placed on the inner side of the rotor, permanent magnets are built-in and embedded in the rotor, each pole of permanent magnet is a V-shaped magnetic circuit, and each pole of magnetic circuit comprises a magnet isolating bridge and a magnet assisting bridge.
Preferably, the stator tooth auxiliary groove is three layers, and a silicon steel water pipe is placed in the auxiliary groove.
Preferably, the rotor silicon steel water pipe is positioned at the bottom of each pole of the V-shaped magnetic circuit and is positioned on the symmetry axis of the V-shaped magnetic circuit.
Preferably, one side of each pole of the V-shaped magnetic circuit is composed of two permanent magnets, a magnet-assisting bridge is embedded between the two permanent magnets, and magnet-isolating bridges are embedded on two sides of the whole composed of the two permanent magnets.
By adopting the technical scheme, the built-in permanent magnet synchronous motor obtains good operation characteristics, and the isolation magnet bridge can prevent the lower utilization rate of permanent magnet materials caused by overlarge magnetic leakage, thereby ensuring that the motor power can stably operate within a certain range; the auxiliary magnetic bridge is additionally arranged between the two sections of permanent magnets, so that a part of magnetic flux can generate magnetic leakage through the iron bridge, the magnetic flux in a main magnetic circuit is reduced, the straight-axis magnetic resistance of the rotor is reduced, and the function of field weakening and speed expansion is started; the rotor conducting bars in the slots on the outer side of the rotor are introduced with symmetrical three-phase current, so that asynchronous starting of the motor can be realized, and the motor can be quickly started to enter a stable state; cold water is introduced into the water pipes embedded in the inner side of the rotor and the teeth of the stator, the specific heat capacity of the water is large, and when the water pipes flow through, the efficiency reduction of the motor caused by temperature rise and the irreversible demagnetization of the permanent magnet caused by overhigh temperature can be effectively inhibited, so that the motor can effectively run at high speed.
Drawings
Fig. 1 is a schematic structural diagram of a novel interior permanent magnet synchronous motor according to the invention.
In the figure: 1. a magnet isolation bridge 2, a silicon steel water pipe 3, a permanent magnet 4, a rotor conducting bar 5 and a magnet assisting bridge.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to the description, fig. 1 is a schematic structural diagram of a novel built-in permanent magnet synchronous motor of the invention; the permanent magnet synchronous motor is characterized in that an outer stator and an inner rotor 8-pole structure are adopted, 48 slots of a stator are adopted, auxiliary slots are additionally arranged on stator teeth, 36 slots are formed in the outer side of the rotor, rotor guide bars are embedded in the slots, 8 silicon steel water pipes are arranged on the inner side of the rotor, permanent magnets are built in and embedded in the rotor, each pole of permanent magnet is a V-shaped magnetic circuit, and each pole of magnetic circuit comprises a magnet isolating bridge and a magnet assisting bridge.
Preferably, the stator tooth auxiliary groove is three layers, and a silicon steel water pipe is placed in the auxiliary groove.
Preferably, the rotor silicon steel water pipe is positioned at the bottom of each pole of the V-shaped magnetic circuit and is positioned on the symmetry axis of the V-shaped magnetic circuit.
Preferably, one side of each pole of the V-shaped magnetic circuit is composed of two permanent magnets, a magnet-assisting bridge is embedded between the two permanent magnets, and magnet-isolating bridges are embedded on two sides of the whole composed of the two permanent magnets.
By adopting the technical scheme, the built-in permanent magnet synchronous motor obtains good operation characteristics, and the isolation magnet bridge can prevent the lower utilization rate of permanent magnet materials caused by overlarge magnetic leakage, thereby ensuring that the motor power can stably operate within a certain range; the auxiliary magnetic bridge is additionally arranged between the two sections of permanent magnets, so that a part of magnetic flux can generate magnetic leakage through the iron bridge, the magnetic flux in a main magnetic circuit is reduced, the straight-axis magnetic resistance of the rotor is reduced, and the function of field weakening and speed expansion is started; the rotor conducting bars in the slots on the outer side of the rotor are introduced with symmetrical three-phase current, so that asynchronous starting of the motor can be realized, and the motor can be quickly started to enter a stable state; cold water is introduced into the water pipes embedded in the inner side of the rotor and the teeth of the stator, the specific heat capacity of the water is large, and when the water pipes flow through, the efficiency reduction of the motor caused by temperature rise and the irreversible demagnetization of the permanent magnet caused by overhigh temperature can be effectively inhibited, so that the motor can effectively run at high speed.
The above description is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above description, and several simple deductions or substitutions may be made without departing from the spirit of the present invention.
Claims (4)
1. The utility model provides a novel built-in PMSM structure which characterized in that: the motor adopts an outer stator and an inner rotor 8-pole structure, a stator 48 slots are formed, auxiliary slots are additionally formed in stator teeth, 36 slots are formed in the outer side of the rotor, rotor guide bars are embedded in the slots, 8 silicon steel water pipes are arranged on the inner side of the rotor, permanent magnets are built in and embedded in the rotor, each permanent magnet is a V-shaped magnetic circuit, and each magnetic circuit comprises a magnet isolating bridge and a magnet assisting bridge.
2. The novel interior permanent magnet synchronous motor structure according to claim 1, characterized in that: the stator tooth auxiliary groove is three layers, and a silicon steel water pipe is placed in the auxiliary groove.
3. The novel interior permanent magnet synchronous motor structure according to claim 1, characterized in that: the rotor silicon steel water pipe is positioned at the bottom of each pole of the V-shaped magnetic circuit and is positioned on a symmetry axis of the V-shaped magnetic circuit.
4. The novel interior permanent magnet synchronous motor structure according to claim 1, characterized in that: one side of each pole of the V-shaped magnetic circuit is composed of two permanent magnets, a magnet-assisting bridge is embedded between the two permanent magnets, and magnet-isolating bridges are embedded on two sides of the whole body composed of the two permanent magnets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110416692.8A CN113131636A (en) | 2021-04-19 | 2021-04-19 | Novel built-in permanent magnet synchronous motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110416692.8A CN113131636A (en) | 2021-04-19 | 2021-04-19 | Novel built-in permanent magnet synchronous motor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113131636A true CN113131636A (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110416692.8A Pending CN113131636A (en) | 2021-04-19 | 2021-04-19 | Novel built-in permanent magnet synchronous motor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113131636A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601486A (en) * | 2019-11-01 | 2019-12-20 | 哈尔滨理工大学 | Built-in permanent magnet synchronous motor structure with efficient speed expansion |
| CN209881626U (en) * | 2019-04-11 | 2019-12-31 | 哈尔滨理工大学 | Novel surface-mounted permanent magnet synchronous motor structure |
| CN112583160A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel permanent magnet synchronous motor structure |
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2021
- 2021-04-19 CN CN202110416692.8A patent/CN113131636A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209881626U (en) * | 2019-04-11 | 2019-12-31 | 哈尔滨理工大学 | Novel surface-mounted permanent magnet synchronous motor structure |
| CN110601486A (en) * | 2019-11-01 | 2019-12-20 | 哈尔滨理工大学 | Built-in permanent magnet synchronous motor structure with efficient speed expansion |
| CN112583160A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel permanent magnet synchronous motor structure |
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Application publication date: 20210716 |
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