A novel space flux cone-disc permanent magnet synchronous motor

Abstract

The present invention relates to a novel spatial flux cone-disc permanent magnet synchronous motor, which includes a housing body, an end cover covering the housing body, and a spatial flux cone-disc structure provided in the housing. Among them, the spatial flux cone-disc structure includes two conical winding stators supported in the housing body. The two conical winding stators are coaxially arranged and the opposite inner sides are concave conical surfaces. A cone-disc rotor with permanent magnet steel is arranged between the two conical winding stators. The cone-disc rotor is in a disc shape and the surface facing the stator is a convex conical surface. The whole cone-disc rotor is in the shape of a conical flying saucer. The cone-disc rotor is connected to an external power shaft through a spline transmission shaft. The energy efficiency conversion ratio of the present invention is high, energy-saving and efficient, and it can be more suitable for the high torque requirements during the acceleration and climbing of electric vehicles and the demand for constant high-efficiency power during the high-speed driving stage.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a novel spatial flux cone-disc permanent magnet synchronous motor. Background Art

[0002] In order to combat environmental pollution, people around the world have increasingly attached importance to the technological development in the field of environmental protection. Environmental protection and energy conservation have become important tasks in the world's industrial technology field, and intelligent and highly energy-efficient motors have become the key development and support direction of the country.

[0003] Currently, in the field of electric drive, the columnar rotor and radial flux motor, that is, the traditional motor, which is technically mature and widely used. In addition, a small number of low-speed axial disc motors have emerged. For electric vehicles, the traditional single motor (columnar motor) is difficult to always operate in the high-efficiency area during the driving of the vehicle. If the torque needs to be increased, only the transmission can be modulated to increase the rotational torque, which easily causes an increase in power loss and wastes the precious power of the power battery. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel spatial flux cone-disc permanent magnet synchronous motor, which has a high torque density, a wide high-efficiency working condition area, a high energy efficiency conversion ratio, is energy-saving and efficient, and is more suitable for the high torque requirements during the acceleration and climbing of electric vehicles and the demand for constant high-efficiency power during the high-speed driving stage.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a novel spatial flux cone-disc permanent magnet synchronous motor. The motor includes a housing body and an end cover. The end cover covering the housing body and the housing body form a cavity structure. In this cavity structure, a spatial flux cone-disc structure is provided. Among them, the spatial flux cone-disc structure includes two conical winding stators supported in the housing body. The two conical winding stators are coaxially arranged and the opposite inner sides are concave conical surfaces. A cone-disc rotor with permanent magnet steel is arranged between the two conical winding stators. The cone-disc rotor is in a disc shape and the surface facing the stator is a convex conical surface. The whole cone-disc rotor is in the shape of a conical flying saucer. The cone-disc rotor is connected to an external power shaft through a spline transmission shaft.

[0007] For the above technical solution, the applicant has further optimization measures.

[0008] Further, the spline transmission shaft includes two bearings fixed on the housing body and a transmission shaft rotatably fixed between the two bearings. The transmission shaft passes through the cone-disc rotor and is concentrically connected to the cone-disc rotor through a key.

[0009] Furthermore, a resolver signal collector is provided at one end of the transmission shaft, and an output shaft with a spline is provided at the other end.

[0010] Furthermore, the conical winding stator includes a stator core and several groups of coil windings tied to the stator core. The stator core is in the shape of a conical disc as a whole, and its inner side surface is concave inward as a whole to form the concave conical surface. The inner side surface of the stator core has several fan-shaped winding core columns evenly arranged along its center. The coil windings are wound on the winding core columns and are powered separately according to each phase to form a sinusoidal rotating spatial magnetic field, generating suspension and tangential traction on the conical disc rotor.

[0011] Furthermore, the winding core column is basically in the shape of an isosceles fan, the central vertex angle of the winding core column points to the cone center of the inner side surface, and several winding core columns are evenly spaced and arranged on the stator core. The raised direction of the winding core column is parallel to the transmission shaft. Several winding core columns are distributed on the stator core in the form of fan-shaped cone surfaces, and the coil winding is wound on the winding core column and embedded in the groove formed between adjacent winding core columns.

[0012] Furthermore, the two conical winding stators each have an independent control circuit, and the two conical winding stators and the conical disc rotor form a dual-motor magnetic coupling direct connection, which can form two working modes: single motor operation or dual motor operation, or at least two permanent magnet synchronous motors are coaxially connected in parallel to form a multi-motor parallel mode.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0014] The permanent magnet synchronous motor with a new spatial magnetic flux cone-disc structure of the present invention adopts a new spatial magnetic flux cone-disc structure to construct a dual-motor magnetically coupled coaxial direct-connected cone-disc rotor. The two stators respectively adopt independent spatial magnetic circuits, which increases the magnetic flux surface and enhances the envelope coverage. The air gap of the cone-disc rotor is matched to integrate the magnetic circuits of the two stators for coaxial drive to form a synthetic motor. It can operate in a single-motor or dual-motor mode according to user needs, so that the vibration suppression ability of the motor is enhanced. The flexible selection of the motor working mode makes the motor have a wider working condition high-efficiency zone, and the operation is more energy-saving and efficient, making the motor a more efficient motor with variable frequency and adjustable power. It can operate in the most power-saving mode to better meet the operating conditions of electric vehicles, save power consumption, and increase mileage.

[0015] In addition, under the drive of this motor control mode, the motor can maintain a high-efficiency working state for a long time without increasing the burden on the motor and reducing the high peak current extraction from the battery, thereby saving energy and extending the service life of the motor and battery.

[0016] Furthermore, due to the structure of the double stator conjugate rotor in this permanent magnet synchronous motor, even if one stator is damaged, the magnetic circuit of the other stator can still operate normally, maintaining the non-high-speed operation of the motor, reducing the probability of fault parking, and improving the safety of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0018] Figure 1 is a schematic diagram of the spatial flux cone disc structure of a permanent magnet synchronous motor according to an embodiment of the present invention.

[0019] The reference numerals are explained as follows:

[0020] 1. Outer shell body, 2. Conical winding stator, 3. Cone disc rotor, 4. Transmission shaft, 5. Bearing, 6. Resolver signal collector; 7. End cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] This embodiment describes a novel spatial flux cone disc permanent magnet synchronous motor, as Figure 1As shown in the figure, the motor includes a housing body 1 with cooling grooves, end caps 7 connected to the left and right ends of the housing body 1. A composite cooling water channel is provided in the end caps 7. The end caps 7 covering the housing body 1 and the housing body 1 form a cavity structure. A spatial flux cone disc structure is provided in this cavity structure. Independent cooling structures are provided in both the end caps 7 and the housing to ensure the heat dissipation of the motor.

[0025] Among them, the spatial flux cone disc structure in this permanent magnet synchronous motor includes two conical winding stators 2 supported in the housing body 1. The two conical winding stators 2 are coaxially arranged and the opposite inner side surfaces are concave conical surfaces. A cone disc rotor 3 with permanent magnet steel and yoke is provided between the two conical winding stators 2. The cone disc rotor 3 is in a disc shape and the surface facing the stator is a convex conical surface. The cone disc rotor 3 is in an overall conical flying saucer shape. The cone disc rotor 3 is connected to an external power shaft through a spline transmission shaft.

[0026] The spline transmission shaft includes two bearings 5 fixed on the housing body 1 and a transmission shaft 4 rotatably fixed between the two bearings 5. The transmission shaft 4 is arranged along the axis of the cone disc rotor 3. The transmission shaft 4 passes through the cone disc rotor 3 and is concentrically connected to the cone disc rotor 3 through a key to achieve synchronous transmission. One end of the transmission shaft 4 is provided with a resolver signal collector 6, and the other end is an output shaft with splines. [[ID=,8]]

[0027] Specifically, the above-mentioned conical winding stator 2 includes a stator core and several groups of coil windings tied to the stator core. The stator core is in an overall conical disc shape, and its inner side surface is recessed inwardly as a whole to form the concave conical surface. On the stator core, the rising direction of the winding core column is parallel to the transmission shaft 4. Several of the winding core columns are distributed in a fan-shaped conical surface on the stator core, and there are several fan-shaped winding core columns evenly arranged along its center. The coil windings are wound on the winding core columns and are respectively connected to electricity according to each phase to form a sinusoidal rotating space magnetic field, generating suspension and tangential traction forces on the cone disc rotor 3.

[0028] The winding core columns are basically in a shape similar to an isosceles fan surface. The central apex angle of the winding core column points to the cone center of the inner side surface. Several of the winding core columns are evenly spaced on the stator core. The rising direction of the winding core columns is parallel to the transmission shaft 4. Several of the winding core columns are distributed in a fan-shaped conical surface on the stator core. The coil windings are wound on the winding core columns and are inter-embedded in the grooves formed between adjacent winding core columns.

[0029] It can be seen that the conical winding stator 2 composed of the stator core and the coil winding forms a spatial conical rotating magnetic field surface after being powered on. Therefore, it has a larger magnetic flux combination surface than motors with the same diameter. The disc-shaped conical disc rotor 3 is a spatial convex magnetic circuit. In the generation of electromagnetic force conversion, it can generate an oblique force along the tangential rotation direction and also generate a traction component force in the upward rotation direction similar to that in magnetic levitation technology, enabling the conical disc rotor 3 to have forward potential energy in motion, thus enabling an ordinary motor that can only operate at low speeds to also transform into a high-speed motor, expanding the high-efficiency working area of the motor, while making the constant torque inflection point lag, improving the motor performance.

[0030] Each of the two conical winding stators 2 has an independent control circuit. A double-motor magnetic coupling direct connection is formed between the two conical winding stators 2 and the conical disc rotor 3, and two working modes, namely single-motor operation or double-motor operation, can be formed.

[0031] Since the double-motor magnetic coupling direct connection and coaxial arrangement are adopted in this embodiment, it can be understood that the two stators can be selectively powered on to drive the conical disc rotor 3. The conical disc rotor 3 can comprehensively use the magnetic circuits of the two stators for coaxial drive to form a combined motor, and can operate in single-motor or double-motor mode according to user needs, enhancing the motor's vibration suppression ability, flexibly selecting the motor working mode, making the motor operation more energy-saving and efficient, making the motor a more efficient motor with variable frequency and adjustable power, capable of operating in the most power-saving mode, saving power consumption, and increasing the driving range. In addition, at least two permanent magnet synchronous motors can be coaxially connected in parallel to form a multi-motor parallel mode, which has strong scalability and is more capable of meeting high-power and high-torque requirements, enabling it to serve a wider range of electric drive power fields.

[0032] For example, name the above two motors as the first motor and the second motor. Among them, the first motor maintains operation in the high-efficiency and high-performance area, and the second motor can increase or decrease the power energy step by step according to the working conditions like a multi-cylinder engine. Increasing the driving current of the second motor can further increase the overall speed or torque of the permanent magnet synchronous motor, and decreasing the driving current of the second motor can further decrease the overall speed or torque of the permanent magnet synchronous motor, better meeting the operating requirements of electric vehicles. In this way, an efficient motor with variable frequency and adjustable power can be coupled, enabling the overall motor to operate in the most power-saving mode, achieving the purpose of working under the best optimized working conditions, better matching the power requirements of vehicle working conditions, enabling the vehicle to work in the high-efficiency area for more time, making the working condition efficiency greater than that of ordinary motors, achieving an increase in the driving range with the same battery power consumption, reducing the large-current impact extraction on the battery, and extending the service life of the battery.

[0033] In addition, due to the structure of the double stator conjugate rotor in the permanent magnet synchronous motor, even if one stator is damaged, the magnetic circuit of the other stator can still operate normally, maintaining the non-high-speed operation of the motor, reducing the probability of fault parking, and improving the safety of the electric vehicle.

[0034] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in this technology to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A novel spatial flux cone-disk permanent magnet synchronous motor, comprising a housing body and an end cover, wherein the end cover and the housing body form a cavity structure, in which a spatial flux cone-disk structure is provided. The spatial magnetic flux conical disc structure includes two conical winding stators supported in the shell body, the two conical winding stators are coaxially arranged and the opposite inner side surfaces are concave conical surfaces, a conical disc rotor with permanent magnetic steel is arranged between the two conical winding stators, the conical disc rotor is disc-shaped and the side facing the stator is a convex conical surface, the conical disc rotor is in the shape of a conical flying saucer as a whole, and the conical disc rotor is connected to the external power shaft via a spline transmission shaft, the conical winding stator includes a stator core and several groups of coil windings tied to the stator core, the stator core is in the shape of a conical disc as a whole, and its inner side surface is concave inward as a whole to form the concave conical surface, and the inner side surface of the stator core is provided with several fan-shaped winding core columns evenly arranged along its center, the coil winding is wound on the winding core column, and is respectively powered according to each phase to form a sinusoidal rotating spatial magnetic field, Generate suspension and tangential traction for the conical disc rotor, the two conical winding stators each have an independent control circuit, the two conical winding stators and the conical disc rotor form a dual-motor magnetic coupling direct connection, which can form two working modes: single motor operation or dual motor operation, or at least two permanent magnet synchronous motors are coaxially connected in parallel to form a multi-motor parallel mode. The above-mentioned dual motors are named the first motor and the second motor. The first motor adopts a high-efficiency and high-performance area to maintain operation, and the second motor gradually increases or decreases power energy according to working conditions. Increasing the driving current of the second motor can further increase the overall speed or torque of the permanent magnet synchronous motor, and reducing the driving current of the second motor can further reduce the overall speed or torque of the permanent magnet synchronous motor. The two stators respectively use independent spatial magnetic circuits, and the conical disc rotor can integrate the magnetic circuits of the two stators for coaxial drive to form a synthetic motor.

2. The novel spatial flux cone-disk permanent magnet synchronous motor according to claim 1 is characterized in that: The spline transmission shaft includes two bearings fixed on the housing body and a transmission shaft rotatably fixed between the two bearings. The transmission shaft passes through the conical disc rotor and is concentrically connected to the conical disc rotor via a key.

3. The novel spatial flux cone-disk permanent magnet synchronous motor according to claim 2 is characterized in that: One end of the transmission shaft is provided with a resolver signal collector, and the other end is an output shaft with a spline.

4. The novel spatial flux cone-disk permanent magnet synchronous motor according to claim 1 is characterized in that: The winding core column is in the shape of an isosceles fan, and the central vertex angle of the winding core column points to the cone center of the inner side surface. Several winding core columns are evenly spaced and arranged on the stator core. The ridge direction of the winding core column is parallel to the spline transmission shaft. Several winding core columns are distributed on the stator core in the form of fan-shaped conical surfaces. The coil winding is wound on the winding core column and embedded in the groove formed between adjacent winding core columns.

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