Rotary synchronous reluctance motor with rotary outer rotor and concentrated stator winding

Abstract

The utility model relates to a rotary synchronous reluctance motor with a rotary outer rotor and concentrated stator windings, belonging to the field of electromechanical technology, the magnetic circuit of the rotor has linear magnetic poles which are arranged in parallel along the axis of the motor. When the position of the rotor is adjusted relative to the stator magnetic pole to minimize the magnetic resistance of the magnetic circuit, a rotating torque is generated, so that the rotation of the rotor is realized. The rotating speed of the rotor directly depends on the switching frequency and amplitude of the voltage applied to the stator winding, which is benefited from the application of the following technical scheme: the manufacturing of the stator winding is simplified, the space between stator slots is reasonably utilized to fill the winding, and the rapid braking of the rotor is realized by applying reverse voltage to the stator winding. And the motor is effectively cooled by airflow generated by an external rotating rotor. The non-uniformity of the rotor magnetic circuit ensures the direct relation between the torque and the rotating speed of the motor. In addition, no permanent magnet is used in the structure, so that the cost of the motor is remarkably reduced, and the motor can work at a higher temperature.

Description

Technical Field

[0001] This application relates to the field of electromechanical technology, and in particular to a rotating synchronous reluctance motor having a rotating outer rotor and concentrated stator windings. Background Technology

[0002] A reluctance motor is a continuously operating electrical drive device whose structure and working principle differ significantly from traditional AC and DC motors. It does not rely on the interaction of magnetic fields generated by the currents in the stator and rotor windings to produce torque; instead, it generates torque based on the "principle of minimum reluctance."

[0003] The rotor of the existing synchronous reluctance motor is located inside. When the synchronous reluctance motor is used to drive fans or the wheels of electric vehicles, the torque value of the motor is relatively small, requiring an additional mechanical rotational energy converter. Utility Model Content

[0004] In order to improve the torque value of a motor with the same size and characteristics, this application provides a rotating synchronous reluctance motor having a rotating outer rotor and a concentrated stator winding.

[0005] The rotating synchronous reluctance motor with a rotating outer rotor and concentrated stator windings provided in this application adopts the following technical solution:

[0006] A rotating synchronous reluctance motor having a rotating outer rotor and a concentrated stator winding includes a stator core, wherein a plurality of spaced stator teeth are fixedly connected to the outer ring wall of the stator core, and a stator winding is wound on each stator tooth; a rotor core is wound around the outside of the stator core, and a plurality of spaced rotor teeth are fixedly connected to the side of the rotor core near the stator core.

[0007] By adopting the above technical solution, the rotor magnetic circuit has linear magnetic poles arranged parallel to the motor axis, generating rotational torque to achieve rotor rotation. Rotational torque is generated when the rotor adjusts its position relative to the stator magnetic poles to minimize magnetic circuit resistance. This is achieved through the application of the following technological advancements: the rotor speed directly depends on the voltage switching frequency and amplitude applied to the stator windings; the stator winding manufacturing process is simplified, and the inter-slot space of the stator is rationally utilized for winding filling; rapid rotor braking is achieved by applying reverse voltage to the stator windings; and effective motor cooling is achieved through the airflow generated by the rotating outer rotor. The magnetic resistance of the rotor magnetic circuit exhibits non-uniformity, thus directly correlated with the motor's torque and speed. Since permanent magnets are not used in the structure, the cost of the engine is significantly reduced, and operation at higher temperatures is permitted.

[0008] Optionally, the number of stator teeth is set to 20.

[0009] By adopting the above technical solution and setting the number of stator teeth to 20, the working efficiency of the motor can be improved under the same current drive.

[0010] Optionally, the number of rotor teeth is set to 18.

[0011] By adopting the above technical solution and setting the number of rotors to 18, the working efficiency of the motor can be improved under the same current drive.

[0012] Optionally, a wedge-shaped winding is wound on the side of the stator winding outside the stator teeth and close to the rotor core.

[0013] By adopting the above technical solution, a conical coil made of copper wire is used. This coil is wound in two layers, with the second layer wound closer to the upper part of the stator teeth. This not only improves the efficiency of the motor but also more effectively fills the space between the poles with the coil, thereby reducing electrical losses in the pole windings by 50%.

[0014] The technical solution employs a conical coil wound with copper wire, wound in two layers, with the second layer wound closer to the upper part of the stator teeth. This improves motor efficiency and more effectively utilizes the inter-pole space for winding filling, thereby reducing electrical losses in the pole shoe coils by 50%.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. Because permanent magnets are not used in the structure, the cost of the engine is significantly reduced, and it can operate at higher temperatures;

[0017] 2. The reluctance motor of this application does not rely on the interaction of the magnetic fields generated by the currents in the stator and rotor windings to generate torque, but rather relies on the "principle of minimum reluctance" to generate torque;

[0018] 3. The internal structure of the motor is simplified because no additional mechanical energy conversion device is needed to transmit force to the vehicle;

[0019] 4. The airflow generated by the rotating outer rotor during its rotation effectively cools the engine during operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0021] Figure 2 This is a schematic diagram showing the positional relationship between the stator core and the rotor core according to an embodiment of this application.

[0022] Figure 3This is a cross-sectional view of the overall structure of an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of the magnetic flux flow direction according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Stator core; 11. Stator tooth; 2. Rotor core; 21. Rotor tooth; 3. Stator winding; 31. Wedge winding; 4. Stator support; 5. Fixed shaft; 51. Connecting hole; 6. Connecting shell; 61. Rotor hub; 62. Rim; 63. Hub cover; 64. Bearing; 7. Air gap; 8. Magnetic flux. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0026] This application discloses a rotating synchronous reluctance motor having a rotating outer rotor and concentrated stator windings, referring to... Figures 1-4 The stator core 1 is circular. A plurality of stator teeth 11 are fixedly connected to the outer ring wall of the stator core 1. In this embodiment, the number of stator teeth 11 is 20, and the 20 stator teeth 11 are evenly distributed around the outer wall of the stator core 1.

[0027] Each stator tooth 11 is surrounded by a stator winding 3, and each stator winding 3 is surrounded by a wedge-shaped winding 31 at the end away from the stator core 1.

[0028] A rotor core 2 is fitted around the stator core 1. Multiple rotor teeth 21 are fixedly connected to the inner wall of the rotor core 2. In this embodiment, 18 rotor teeth 21 are evenly distributed around the inner wall of the rotor core 2. An air gap 7 exists between the end of each rotor tooth 21 furthest from the rotor core 2 and the end of the adjacent stator tooth 11 furthest from the stator core 1. A magnetic flux 8 exists between the stator tooth 11 and the rotor tooth 21.

[0029] A stator support 4 is fixedly inserted into the inner wall of the stator core 1, and a fixed shaft 5 is fixedly inserted into the inner wall of the stator support 4. A connecting hole 51 is provided on the fixed shaft 5, and a wire connected to the stator winding 3 and the wedge winding 31 can be inserted into the connecting hole 51.

[0030] A connecting shell 6 is fitted around the rotor core 2 and the stator core 1.

[0031] In practical use, wires are passed through the connecting hole 51 and connected to the stator winding 3 and the wedge winding 31, and then connected to the controller. By changing the direction of current flow into the stator winding 3 and the wedge winding 31, the magnetic poles at the stator teeth 11 are changed. This allows the stator teeth 11 to attract the rotor teeth 21, thereby driving the rotor to rotate. During the rotation of the rotor, the outer casing and the tire connected to the casing rotate. By placing the rotor outside the stator, the rotor can have a larger torque during rotation, thus enabling the motor to better drive the tire connected to the motor to rotate.

[0032] The connecting housing 6 includes a rotor hub 61 fixedly connected to the outer wall of the rotor core 2. A rim 62 is fixedly connected to the side of the rotor hub 61 away from the rotor core 2. A hub cover 63 is provided on one side of the rotor hub 61. A fixed shaft 5 passes through the hub cover 63 on the side near the hub cover 63, and a hub bearing 64 is sleeved between the fixed shaft 5 and the inner wall of the hub cover 63 through which it passes.

[0033] The implementation principle of a rotating synchronous reluctance motor with a rotating outer rotor and a concentrated stator winding 3 in this application embodiment is as follows: when it is necessary to use the motor to drive the tire to rotate, the motor is connected to the tire, and then the direction of the current connected to the stator winding 3 and the wedge winding 31 is switched to change the magnetic pole at the stator tooth 11, thereby realizing the process of driving the tire located outside the rotor core 2 to rotate.

[0034] When using the above technical solution, the stator winding 3 has linear magnetic poles arranged parallel to the motor axis. When the rotor adjusts its position relative to the stator poles to minimize magnetic reluctance, a rotational torque is generated, thus achieving rotor rotation. The rotor's rotational speed directly depends on the frequency and amplitude of the voltage applied to the stator winding 3. The rotor has a non-uniform magnetic reluctance structure to generate torque. At the instant voltage is applied to the winding, the rotor attempts to occupy a position relative to the stator poles such that the magnetic reluctance of the closed magnetic flux 8 is minimized. Then, the voltage switches to the next set of windings (poles), which are always 180 degrees apart from each other and from the rotor. The rotor thus occupies a new position. Since the switching of winding pairs occurs circumferentially, the rotor rotates synchronously in the switching direction. This switching eliminates the need for a voltage inverter in the controller to convert DC to AC, thus reducing costs as only a constant DC current is required.

[0035] By employing the following technical solutions, the manufacturing of stator winding 3 can be simplified, the space between stator slots can be efficiently utilized to fill the winding, rapid rotor braking can be achieved by applying a reverse voltage to stator winding 3, and the motor can be effectively cooled by airflow generated by the externally rotating rotor. The non-uniformity of the rotor flux linkage ensures a direct relationship between torque and motor speed. Furthermore, the absence of permanent magnets in the structure significantly reduces motor costs and allows operation at higher temperatures.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotating synchronous reluctance motor having a rotating outer rotor and concentrated stator windings, characterized in that: The stator core (1) is fixedly connected to the outer ring wall of the stator core (1) with a plurality of spaced stator teeth (11), and a stator winding (3) is wound on each stator tooth (11). A rotor core (2) is wound around the outside of the stator core (1), and a plurality of spaced rotor teeth (21) are fixedly connected to the side of the rotor core (2) near the stator core (1).

2. A rotating synchronous reluctance motor with a rotating outer rotor and concentrated stator windings according to claim 1, characterized in that: The number of stator teeth (11) is set to 20.

3. A rotating synchronous reluctance motor with a rotating outer rotor and concentrated stator windings according to claim 1, characterized in that: The number of rotor teeth (21) is set to 18.

4. A rotating synchronous reluctance motor with a rotating outer rotor and concentrated stator windings according to claim 1, characterized in that: A wedge-shaped winding (31) is wound on the outside of the stator winding (3) outside the stator teeth (11) and on the side close to the rotor core (2).

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