CN108258821B - Cylinder type single air gap inner rotor motor - Google Patents
Cylinder type single air gap inner rotor motor Download PDFInfo
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- CN108258821B CN108258821B CN201810109551.XA CN201810109551A CN108258821B CN 108258821 B CN108258821 B CN 108258821B CN 201810109551 A CN201810109551 A CN 201810109551A CN 108258821 B CN108258821 B CN 108258821B
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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
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/22—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of hollow conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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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
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a cylinder type single air gap inner rotor motor, which comprises an inner rotor assembly and an outer stator assembly, wherein the inner rotor assembly comprises a motor shaft, a cylinder-shaped magnetic yoke sleeved on the motor shaft and a plurality of permanent magnets arranged on the magnetic yoke; the outer stator assembly comprises a motor shell and a cylindrical coil positioned in the motor shell; the cylindrical coil is wound by a hollow wire, and the motor comprises a cooling system comprising a compressor, a condenser, a throttling element and an evaporator formed by the hollow wire, which are connected in sequence by a pipeline. Therefore, when the cooling system works, the refrigerant in the hollow wire evaporates and absorbs heat, so that the hollow wire generates refrigerating capacity, and the coil can be cooled down quickly. Therefore, the heat generated by the coil can be quickly neutralized by the refrigerating capacity generated by the hollow wire, the coil can be quickly cooled, and the temperature requirement of the coil can be met.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a cylinder type single-air-gap inner rotor motor.
Background
With the increasing shortage of energy sources worldwide, the effective utilization of energy sources is more and more emphasized, and the development of power generators and motors is a great importance of modern energy equipment, so that energy conservation and environmental protection are key problems to be solved urgently. Asynchronous motors and excitation synchronous motors are the most common motors at present, and are double-iron loss and copper loss, the actual efficiency is only 60-70%, and the energy consumption is relatively high. The permanent magnet synchronous motor has better efficiency and energy saving compared with the two types of motors, but is not ideal, has double loss of copper loss and iron loss, has very large permanent magnet magnetic resistance, and is seemingly energy-saving in the structure of a permanent magnet and an iron core, but the permanent magnet magnetic resistance generated between a stator and a rotor gives energy-saving power to be lost, so that direct driving is realized. The development of permanent magnet motors is the most energy-efficient motor technology at present, and the structure of the permanent magnet motor has only copper loss. Compared with other motors, the permanent magnet motor has higher efficiency, but the current application is less, and the key problem is that the cooling problem of the motor cannot be solved, thus preventing the application of the permanent magnet motor.
Disclosure of Invention
The invention aims to provide a cylinder type single-air-gap inner rotor motor, which solves the technical problem of cooling of the existing motor.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
a cylindrical single-air-gap inner rotor motor, the motor comprises an inner rotor assembly and an outer stator assembly, the inner rotor assembly comprises a motor shaft, a cylindrical magnetic yoke sleeved on the motor shaft and a plurality of permanent magnets arranged on the magnetic yoke; the outer stator assembly comprises a motor housing and a cylindrical coil positioned in the motor housing; the cylindrical coil is wound by a hollow wire, and the motor comprises a cooling system, wherein the cooling system comprises a compressor, a condenser, a throttling element and an evaporator formed by the hollow wire, which are sequentially connected by pipelines.
The cooling system comprises a controller and a temperature sensor for detecting the temperature of the coil, wherein the temperature sensor detects the temperature of the coil and transmits the temperature to the controller, and the controller is used for controlling the operation frequency of the compressor according to the temperature.
The cylinder type single air gap inner rotor motor is characterized in that the throttling element is an electronic expansion valve, and the controller is used for controlling the opening degree of the electronic expansion valve.
A single air gap inner rotor motor of the type described above, the motor comprising a thermally conductive disc in contact with the vacuum superconducting module and the motor housing.
The cylindrical single-air-gap inner rotor motor is characterized in that the magnetic yoke is provided with a plurality of mounting cavities for mounting the permanent magnets, the mounting cavities are distributed in parallel with the axis of the magnetic yoke and are arranged at certain intervals in the circumferential direction of the magnetic yoke, and the magnetic poles of the permanent magnets are identical in the same axis direction and are alternately distributed in the circumferential direction; and a magnetic conduction spacer is arranged between two adjacent permanent magnets in the axial direction of the magnetic yoke.
The cylindrical single-air-gap inner rotor motor is characterized in that two magnetism isolating cavities are arranged between the mounting cavity and the central axis of the magnetic yoke.
The two magnetism isolating cavities are connected and form a certain included angle.
The cylindrical magnetic conduction piece comprises a plurality of T-shaped stator magnetic conduction rings and I-shaped stator magnetic conduction rings, wherein the T-shaped stator magnetic conduction rings comprise annular parts and a plurality of T-shaped parts positioned on the inner wall of the annular parts, the I-shaped stator magnetic conduction rings comprise annular parts and a plurality of I-shaped parts positioned on the inner wall of the annular parts, a plurality of I-shaped stator magnetic conduction rings are arranged between two adjacent T-shaped stator magnetic conduction rings, and coil winding spaces are formed between adjacent T-shaped parts of the same T-shaped stator magnetic conduction ring and between adjacent I-shaped parts of the same I-shaped stator magnetic conduction ring; the magnetic conductivity of the T-shaped stator magnetic conduction ring is smaller than that of the I-shaped part of the I-shaped stator magnetic conduction ring; the positions of the I-shaped stator magnetic guide rings between two adjacent T-shaped stator magnetic guide rings are opposite to the positions of the permanent magnets on one circumferential line of the inner rotor assembly.
The cylindrical single-air-gap inner rotor motor is characterized in that the T-shaped parts are uniformly distributed on the inner wall of the annular part at intervals, the tangential line of the intersection of the I-shaped part and the annular part of the T-shaped part is vertical, and the I-shaped part and the annular part of the T-shaped part are on the same plane; the I-shaped parts are uniformly distributed on the inner wall of the annular part at intervals, and the tangential line of the intersection of the I-shaped parts and the annular part is vertical.
The diameter of the annular part of the T-shaped stator magnetic conduction ring is the same as that of the annular part of the I-shaped stator magnetic conduction ring, the annular part of the T-shaped stator magnetic conduction ring and the annular part of the I-shaped stator magnetic conduction ring are coaxially arranged, the distance between the I-shaped parts of two adjacent T-shaped parts of the T-shaped stator magnetic conduction ring is the same as that between the I-shaped parts of two adjacent I-shaped parts of the I-shaped stator magnetic conduction ring, and the I-shaped parts of the T-shaped stator magnetic conduction ring and the I-shaped parts of the I-shaped stator magnetic conduction ring are coaxially distributed.
The free end of the I-shaped part of the I-shaped magnetic conduction ring is provided with a dovetail groove, the dovetail groove is provided with a magnetic conduction head, and the magnetic conduction head is provided with a dovetail shape matched with the dovetail groove.
Compared with the prior art, the invention has the advantages and positive effects that: the cylindrical coil of the cylindrical single-air-gap inner rotor motor is wound by the hollow wire, the hollow wire is filled with the refrigerant, the motor comprises a cooling system, and the cooling system comprises a compressor, a condenser, a throttling element and an evaporator formed by a cooling pipeline in a motor shell, which are sequentially connected by pipelines, so that the refrigerant in the hollow wire is evaporated and absorbs heat when the cooling system works, the hollow wire generates refrigerating capacity, and the coil can be cooled down rapidly. Therefore, the heat generated by the coil can be quickly neutralized by the refrigerating capacity generated by the hollow wire, the coil can be quickly cooled, and the temperature requirement of the coil can be met.
Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Drawings
Fig. 1 is a cross-sectional view of an electric motor in accordance with an embodiment of the present invention.
FIG. 2 is a schematic diagram of a cooling system according to an embodiment of the invention.
Fig. 3 is an exploded view of a motor according to an embodiment of the present invention.
Fig. 4 is a schematic view of a permanent magnet and yoke portion according to an embodiment of the present invention.
Fig. 5 is an exploded view of a permanent magnet and yoke portion according to an embodiment of the present invention.
Fig. 6 is an exploded view of an outer stator assembly and a heat conducting plate according to an embodiment of the present invention.
Fig. 7 is a schematic view of a magnetic ring according to an embodiment of the present invention (with the magnetic head removed).
Fig. 8 is a partial enlarged view of fig. 7 (I-type magnetic conductive ring and magnetic conductive head exploded state).
Fig. 9 is a schematic diagram of a T-shaped magnetic conductive ring and an I-shaped magnetic conductive ring (I-shaped magnetic conductive ring and magnetic conductive head are separated) according to an embodiment of the present invention.
Fig. 10 is a schematic diagram showing the flow of refrigerant through cooling lines in a hollow wire according to an embodiment of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings.
As shown in fig. 1-3, the present embodiment proposes a single air gap inner rotor motor of the cartridge type, the motor comprising an outer stator assembly, an inner rotor assembly and a cooling system.
The inner rotor assembly includes a motor shaft 101, a cylindrical yoke 102 fitted over the motor shaft 101, and a number of permanent magnets 103 mounted on the cylindrical yoke 102.
The outer stator assembly includes a motor housing 201, end caps 202 at both ends of the motor housing 201, and a cylindrical coil 203 inside the motor housing 201.
The motor housing 201 is fixedly connected with the end cover 202, the end cover 202 is connected with the motor shaft 101 through the bearing 3, and relative rotation is realized between the motor housing 201 and the motor shaft 101 through the bearing 3. The motor housing 201, the end cover 202 and the coil 203 synchronously rotate relative to the motor shaft 101, that is, when the permanent magnet 103 rotates relative to the coil 203, the coil 203 performs cutting magnetic induction line movement to generate current, and at the moment, the motor is a generator. When the coil 203 is energized, an electromagnetic field generated by the coil 203 interacts with the permanent magnet 103 to drive the motor shaft 101 to rotate relative to the motor housing 201, and at this time, the motor is a motor. The motor includes a rotary transformer, and a rotating shaft of the rotary transformer is fixedly connected to the motor shaft 101 for detecting corresponding angles of the rotor assembly and the stator assembly.
The motor housing 201 is made of metal, and has the function of shielding magnetic fields to prevent leakage of the magnetic fields.
To achieve cooling of the motor, the motor of this embodiment includes a cooling system, with the coil 203 being wound by a hollow wire, in which a refrigerant is poured. As shown in fig. 1 and 2, the cooling system includes a compressor 41, a condenser 42, a throttling element 43, and an evaporator formed of hollow wires, which are sequentially connected by pipes, and is filled with a refrigerant. The heat generated by the coil 203 can be quickly counteracted by the refrigerating capacity generated by the refrigerant of the hollow wire, and when the compressor 41 operates, the refrigerant in the hollow wire evaporates and absorbs heat to generate refrigerating capacity, so that the heat generated by the coil 203 is counteracted, the coil 203 can be quickly cooled, and the temperature requirement of the coil 203 can be met.
In order to further secure the temperature of the coil, the cooling system of the present embodiment includes a controller and a temperature sensor for detecting the temperature of the coil 203, the temperature sensor detecting the temperature of the coil and transmitting the temperature to the controller, the controller for controlling the operating frequency of the compressor according to the temperature. When the temperature of the coil is higher than a set threshold value, controlling the operation frequency of the compressor to be improved, and increasing the refrigerating effect of the hollow wire so as to quickly reduce the temperature of the coil; when the temperature of the coil is lower than a set threshold value, the running frequency of the compressor is controlled to be reduced, the temperature of the coil can be ensured to meet the requirement, the temperature of the coil can be prevented from being too low, and meanwhile, energy sources can be saved. According to the embodiment, the temperature of the coil can be ensured to be always within the set threshold range on the basis of using the minimum energy, and the non-reluctance motor can work safely and stably.
The throttling element may be a capillary tube, and the throttling element in this embodiment preferably adopts an electronic expansion valve, and the controller may output a control signal to control the opening of the electronic expansion valve, so as to more accurately adjust the temperature of the coil during operation.
As shown in fig. 10, a schematic diagram of the flow direction of the refrigerant in a hollow wire is shown, the hollow wire is connected with a pipeline of the refrigeration system, one end of the hollow wire is provided with a liquid inlet, the other end is provided with a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected with the pipeline. The three hollow wires are generally provided with three liquid inlet ends which are made of nonmetallic materials and connected with the pipe orifice of the pipeline connected with the throttling element, and liquid outlet ends of the three hollow wires are made of nonmetallic materials and connected with the pipe orifice of the pipeline connected with the compressor.
In order to improve the motor efficiency, the installation mode of the permanent magnet 103 and the installation mode of the coil 203 are improved, so that a cylindrical single-air-gap inner rotor reluctance-free motor is formed:
as shown in fig. 4 and 5, the magnetic yoke 102 is provided with a plurality of mounting cavities 104 for mounting the permanent magnets 103, and the mounting cavities 104 are distributed parallel to the axis of the magnetic yoke 102 and are arranged at a certain interval in the circumferential direction of the magnetic yoke 102. The mounting cavities 104 are uniformly distributed in the axial direction of the yoke 102. The magnetic poles of the permanent magnets 103 are the same in the same axis direction and alternately distributed in the circumferential direction; n poles or S poles are arranged on the same axis, and the N poles and the S poles are alternately distributed on the same circumferential direction. Wherein, the installation cavity 104 and the permanent magnet 103 are both triangular columns.
A magnetic conductive spacer 105 is provided between two adjacent permanent magnets 103 in the axial direction of the yoke. The magnetic conduction spacer 105 can avoid the repulsion of homopolar, so that two adjacent homopolar permanent magnets 103 are attracted together. Two magnetism isolating cavities 106 are arranged between each mounting cavity 104 and the central axis of the magnetic yoke, the two magnetism isolating cavities 106 are connected and form a certain included angle, the magnetism isolating cavities 106 can isolate the magnetic field of the permanent magnets 103 towards the central axis direction of the magnetic yoke, the mutual interference between the opposite permanent magnets 103 on the magnetic yoke is avoided, and the magnetic field effect of the permanent magnets 103 towards the stator assembly direction is ensured.
The existing permanent magnet motor permanent magnet is directly exposed in an air gap magnetic field by adopting surface mounting, so that the permanent magnet is easy to demagnetize, and the weak magnetic energy is limited. The permanent magnet of the embodiment is embedded in the magnetic yoke to form an embedded rotor structure, the q-axis inductance is larger than the d-axis inductance, the rotor has a salient pole effect, the dynamic performance of the embedded structure is improved compared with that of a surface-mounted type rotor, the permanent magnet of the embedded rotor structure is positioned in the magnetic yoke, a pole shoe made of ferromagnetic substances is arranged between the outer surface of the permanent magnet and the inner circle of the stator core and used for protecting the permanent magnet in the embedded rotor core. In this embodiment, for ease of processing, the cylindrical yoke 102 is formed by press-fitting a plurality of yoke bodies 1021, and magnetic short-circuiting can also be avoided, and the yoke bodies 1021 are fitted with the motor shaft 101 through key grooves and key bars.
When the rotor is assembled, a plurality of magnet yoke bodies 1021 are sleeved on a motor shaft 101, key bars are inserted into key grooves, a plurality of magnet yoke bodies 1021 are pressed into a cylindrical magnet yoke 102 by using a press machine, lock nuts are arranged at two ends of the motor shaft, after the press-fitting is performed, the lock nuts are locked, then the permanent magnets 103 and the magnetic conduction spacers 105 are filled, and finally the installation cavity 104 is sealed by using alloy materials.
As shown in fig. 6-9, the outer stator assembly includes a number of T-shaped stator magnetic flux rings 206 and I-shaped stator magnetic flux rings 207. A plurality of I-shaped stator magnetic conductive rings 207 are arranged between two adjacent T-shaped stator magnetic conductive rings 206.
The T-shaped stator magnetic conductive ring 206 includes an annular portion 2061 and a plurality of T-shaped portions 2062 located on the inner wall of the annular portion 2061, the T-shaped portions 2062 are uniformly distributed on the inner wall of the annular portion 2061 at intervals, the "I" portion of the T-shaped portions is perpendicular to the tangent line where the annular portion 2061 intersects, and the "a" portion of the T-shaped portions is on the same plane as the annular portion 2061.
The I-shaped stator magnetic conduction ring 207 comprises a ring-shaped part 2071 and a plurality of I-shaped parts 2072 positioned on the inner wall of the ring-shaped part 2071, wherein the I-shaped parts 2072 are uniformly distributed on the inner wall of the ring-shaped part 2071 at intervals, and the tangent line at the intersection of the I-shaped part 2072 and the ring-shaped part 2071 is vertical.
The diameter of the annular part 2061 of the T-shaped stator magnetic conduction ring 206 is the same as the diameter of the annular part 2071 of the I-shaped stator magnetic conduction ring 207, and the annular part 2061 of the T-shaped stator magnetic conduction ring 206 and the annular part 2071 of the I-shaped stator magnetic conduction ring 207 are coaxially arranged. The distance between the 'I' parts of two adjacent T-shaped parts of the T-shaped stator magnetic conduction ring 206 is the same as the distance between the two adjacent I-shaped parts of the I-shaped stator magnetic conduction ring 207. The "I" portion of the T-shaped stator magnetic flux ring 206 is coaxially distributed with the I-shaped portion of the I-shaped stator magnetic flux ring 207.
Coil winding spaces are formed between adjacent T-shaped parts of the same T-shaped stator magnetic conduction ring 206 and between adjacent I-shaped parts of the same I-shaped stator magnetic conduction ring, and the magnetic conduction performance of the T-shaped stator magnetic conduction ring 206 is smaller than that of the I-shaped stator magnetic conduction ring 207.
The position of the I-shaped stator magnetic flux ring 207 between two adjacent T-shaped stator magnetic flux rings 206 corresponds to the position of the permanent magnet 103 on one circumference of the inner rotor assembly. The magnetic force lines of the permanent magnet 103 directly pass through the I-type stator magnetic conduction ring 207 with high magnetic conduction performance, so that the motor efficiency is improved.
A dovetail groove 209 is processed at the free end of the l-shaped part 2072 of the l-shaped magnetic conduction ring 207, a magnetic conduction head 208 is arranged on the dovetail groove 209, the magnetic conduction head 208 is T-shaped, and the free end of the I-shaped magnetic conduction head 208 is provided with a dovetail shape matched with the dovetail groove 209. The magnetic head 208 cooperates with the T-shaped magnetic ring 206 to cancel the magnetic resistance. The magnetic permeability of the magnetic head 208 is the same as or similar to the magnetic permeability of the T-stator magnetic conductive ring.
The stator assembly of the embodiment includes a plurality of T-shaped stator magnetic conductive rings 206 and I-shaped stator magnetic conductive rings 207, the T-shaped stator magnetic conductive rings 207 have low magnetic conductive performance, and the I-shaped stator magnetic conductive rings 207 have high magnetic conductive performance, wherein the height of the I-shaped portion is smaller than the height of the T-shaped portion. The T-shaped portion forms a slot wedge for positioning the coil, and a tight air gap is formed between the T-shaped portion and the inner rotor assembly, which reduces reluctance. The air gap between the I-shaped part and the inner rotor component is larger than the air gap between the T-shaped part and the inner rotor component, an accurate gap is formed between the magnetic guide head of the I-shaped part and the inner rotor component, the gap between the magnetic guide head of the I-shaped part and the inner rotor component can reduce reactive magnetic fields, eliminate heating loss, eliminate higher harmonic potential and higher tooth harmonic potential, eliminate squeal caused by magnetic resistance, realize the effect of no magnetic resistance, and improve effective efficiency.
When the stator is assembled, the T-shaped stator magnetic conduction ring 206 is firstly assembled, the I-shaped stator magnetic conduction ring 207 is assembled, the magnetic conduction head 208 is assembled on the dovetail groove 209 of the I-shaped stator magnetic conduction ring 207, the T-shaped stator magnetic conduction ring 206 is assembled, and the like, and finally the coil is embedded after press-fitting and forming.
In the running process of the motor, the temperature of the coil 203 is detected by the temperature sensor and sent to the controller, and the controller controls the running frequency of the compressor and the opening of the electronic expansion valve according to the temperature, so that the temperature of the coil 203 is maintained within a set threshold range, and the safe and stable operation of the reluctance-free motor is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The motor is characterized by comprising an inner rotor assembly and an outer stator assembly, wherein the inner rotor assembly comprises a motor shaft, a cylindrical magnetic yoke sleeved on the motor shaft and a plurality of permanent magnets arranged on the magnetic yoke; the outer stator assembly comprises a motor housing and a cylindrical coil positioned in the motor housing; the motor comprises a cooling system, wherein the cooling system comprises a compressor, a condenser, a throttling element and an evaporator formed by hollow wires, which are sequentially connected by pipelines; the outer stator assembly comprises a plurality of T-shaped stator magnetic conduction rings and I-shaped stator magnetic conduction rings, the T-shaped stator magnetic conduction rings comprise annular parts and a plurality of T-shaped parts positioned on the inner wall of the annular parts, the I-shaped stator magnetic conduction rings comprise annular parts and a plurality of I-shaped parts positioned on the inner wall of the annular parts, a plurality of I-shaped stator magnetic conduction rings are arranged between two adjacent T-shaped stator magnetic conduction rings, and coil winding spaces are formed between adjacent T-shaped parts of the same T-shaped stator magnetic conduction ring and between adjacent I-shaped parts of the same I-shaped stator magnetic conduction ring; the magnetic conductivity of the T-shaped stator magnetic conduction ring is smaller than that of the I-shaped stator magnetic conduction ring, and the height of the I-shaped part is smaller than that of the T-shaped part; the position of the I-shaped stator magnetic conduction ring between two adjacent T-shaped stator magnetic conduction rings is opposite to the position of the permanent magnet on one circumferential line of the inner rotor assembly;
the free end of the I-shaped part of the I-shaped stator magnetic conduction ring is provided with a dovetail groove, the dovetail groove is provided with a magnetic conduction head, the magnetic conduction head is T-shaped, the free end of the I-shaped magnetic conduction head is arranged into a dovetail shape matched with the dovetail groove, and the magnetic conduction performance of the magnetic conduction head is the same as or similar to that of the T-shaped stator magnetic conduction ring.
2. The single air gap inner rotor motor of claim 1, wherein the cooling system includes a controller and a temperature sensor for detecting the temperature of the cylindrical coil, the temperature sensor detecting the temperature of the cylindrical coil and transmitting the temperature to the controller, the controller for controlling the operating frequency of the compressor based on the temperature.
3. A single air gap inner rotor motor as claimed in claim 2, wherein the throttling element is an electronic expansion valve, and the controller is adapted to control the opening of the electronic expansion valve.
4. A single air gap inner rotor motor as claimed in any one of claims 1 to 3, wherein the yoke is provided with a plurality of mounting cavities for mounting permanent magnets, the mounting cavities are all arranged parallel to the axis of the yoke and are arranged at a certain interval in the circumferential direction of the yoke, and the poles of the permanent magnets are identical in the same axial direction and are alternately distributed in the circumferential direction; and a magnetic conduction spacer is arranged between two adjacent permanent magnets in the axial direction of the magnetic yoke.
5. The single air gap inner rotor motor of claim 4, wherein two magnetically isolated cavities are provided between the mounting cavity and the yoke central axis.
6. The single air gap inner rotor motor of claim 5, wherein the two magnetically isolated cavities are connected and angled.
7. The single air gap inner rotor motor of claim 1, wherein the T-shaped parts are uniformly distributed on the inner wall of the annular part at intervals, the I-shaped parts of the T-shaped parts are perpendicular to the tangent line at the intersection of the annular part, and the one-shaped parts of the T-shaped parts and the annular part are on the same plane; the I-shaped parts are uniformly distributed on the inner wall of the annular part at intervals, and the tangential line of the intersection of the I-shaped parts and the annular part is vertical.
8. The single air gap inner rotor motor of claim 1, wherein the diameter of the annular part of the T-shaped stator magnetic conduction ring is the same as the diameter of the annular part of the I-shaped stator magnetic conduction ring, the annular part of the T-shaped stator magnetic conduction ring and the annular part of the I-shaped stator magnetic conduction ring are coaxially arranged, the distance between the 'I' parts of two adjacent T-shaped parts of the T-shaped stator magnetic conduction ring is the same as the distance between two adjacent I-shaped parts of the I-shaped stator magnetic conduction ring, and the 'I' parts of the T-shaped stator magnetic conduction ring and the I-shaped parts of the I-shaped stator magnetic conduction ring are coaxially distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109551.XA CN108258821B (en) | 2018-02-05 | 2018-02-05 | Cylinder type single air gap inner rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109551.XA CN108258821B (en) | 2018-02-05 | 2018-02-05 | Cylinder type single air gap inner rotor motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108258821A CN108258821A (en) | 2018-07-06 |
| CN108258821B true CN108258821B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810109551.XA Active CN108258821B (en) | 2018-02-05 | 2018-02-05 | Cylinder type single air gap inner rotor motor |
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