A high power density hybrid excitation reluctance motor structure

Abstract

The utility model relates to the technical field of motor especially is a kind of high power density hybrid excitation reluctance motor structure, it is through permanent magnet and enhances air gap magnetic density, makes power density and efficiency promotion;And through the rotor core no permanent magnet structure, cost is reduced, dynamic balance performance improves;And through permanent magnet and stator core arrangement, heat dissipation improves, demagnetization risk reduces;Including rotor core, armature winding and stator core, stator core includes stator yoke part, stator tooth and armature winding, rotor core is salient pole core structure;It further includes the permanent magnet of being embedded in the yoke part slot position between stator core tooth, permanent magnet and armature winding magnetic field form superposition in magnetic circuit.

Description

Technical Field

[0001] This utility model relates to the technical field of motors, and in particular to a high power density hybrid excitation reluctance motor structure. Background Technology

[0002] In the field of electric motors, to meet energy conservation and environmental protection requirements, it is necessary to improve the power density and efficiency of motors. Commonly used technologies include permanent magnet synchronous motors (PMSM) and switched reluctance motors (SRM). Permanent magnet synchronous motors have high torque density and efficiency, but the permanent magnets in the rotor lead to high costs, the risk of demagnetization, and complex high-speed field weakening control. Switched reluctance motors have a pure salient pole iron core rotor, which is simple in structure, low in cost, and suitable for high-speed operation, but has low torque density and power factor, and high vibration and noise. Therefore, a high power density hybrid excitation reluctance motor structure has emerged.

[0003] For example, in a class of prior art represented by application number CN202120757540.X, the main structure includes a 12-slot, 8-pole electromagnetic scheme. The motor stator is equipped with 12 windings, with 4 windings per phase and the parameters of the 4 windings being the same. The 12 windings are divided into three phases: U, V, and W. Each U phase, V phase, and W phase forms a group, and the U, V, and W phases in each group are arranged in sequence, providing a motor structure that improves the quality of the motor.

[0004] Existing permanent magnet synchronous motors have high costs and demagnetization risks due to their rotor permanent magnets. They are also complex to control at high speeds. Furthermore, switched reluctance motors have low torque density and power factor, and high vibration and noise during operation. To solve these problems, there is an urgent need for a high power density hybrid excitation reluctance motor structure. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high power density hybrid excitation reluctance motor structure that enhances the air gap magnetic flux density by using permanent magnets to improve power density and efficiency; reduces costs and improves dynamic balance performance by using a rotor core without permanent magnets; and improves heat dissipation and reduces the risk of demagnetization by arranging permanent magnets and stator cores.

[0006] This invention discloses a high-power-density hybrid-excitation reluctance motor structure, comprising a rotor core, an armature winding, and a stator core. The stator core includes a stator yoke, stator teeth, and the armature winding. The rotor core has a salient-pole core structure. It also includes permanent magnets embedded in slots within the yoke of the stator core teeth. The permanent magnets and the armature winding magnetic field superimpose in the magnetic circuit. The permanent magnets generate a constant magnetic field, which superimposes with the armature winding magnetic field in the air gap and rotor core, enhancing the main magnetic flux. This allows the armature winding to generate the same torque with a smaller current, thereby improving the motor's power density and efficiency.

[0007] Preferably, the rotor core is a pure salient pole core structure, without permanent magnets or windings; the pure salient pole structure of the rotor core simplifies the manufacturing process, reduces costs, and improves dynamic balance performance and high-speed operation stability.

[0008] Preferably, the permanent magnet is located in the yoke of the stator core near the motor housing; by arranging the permanent magnet close to the housing, heat is conducted through the stator core to the housing and dissipated by the cooling system, preventing the permanent magnet from demagnetizing at high temperatures and improving heat dissipation performance and reliability.

[0009] Preferably, the stator core is provided with multiple sets of stator teeth, and the armature winding is wound on the stator teeth; the stator teeth support the armature winding, forming a uniform magnetic field distribution, which, in conjunction with the magnetic field of the permanent magnet, enhances the air gap magnetic flux density and improves the stability of torque output.

[0010] Preferably, an air gap is formed between the rotor core salient pole and the stator teeth; the air gap allows for efficient transmission of the magnetic field, enabling the permanent magnet magnetic field and the armature magnetic field to be superimposed in the rotor core, thereby optimizing the magnetic circuit efficiency and reducing reluctance torque pulsation.

[0011] Preferably, the motor housing surrounds the stator core and rotor core; the housing provides mechanical support and heat dissipation path by encapsulating the internal structure, protecting the permanent magnets and windings, and improving the overall structural strength and environmental adaptability.

[0012] Preferably, the injection molded part is fixed to the stator core or the outer shell; the injection molded part prevents displacement and short circuit by insulating and fixing the armature winding and permanent magnet, thereby improving the safety and durability of the motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the permanent magnet generates a constant magnetic field, which is superimposed with the armature winding magnetic field in the air gap and rotor core, thereby enhancing the main magnetic flux, enabling the armature winding to generate the same torque with a smaller current, and improving power density and efficiency. Attached Figure Description

[0014] Figure 1 This is the structural isometric drawing of this utility model; Figure 2 This is the structural isometric drawing of this utility model; Figure 3 This is an exploded view of the structure of this utility model; Figure 4 This is the structural isometric drawing of this utility model; Figure 5 This is the structural isometric drawing of this utility model.

[0015] The attached diagram is labeled as follows: 01, rotor core; 02, armature winding; 03, permanent magnet; 04, stator core; 05, injection molded part. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] A high power density hybrid excitation reluctance motor structure includes a rotor core 01, an armature winding 02, and a stator core 04. The stator core 04 includes a stator yoke, stator teeth, and the armature winding 02. The rotor core 01 has a salient pole core structure. The characteristic feature is that it also includes a permanent magnet 03 embedded in the slot of the yoke between the teeth of the stator core 04. The magnetic field of the permanent magnet 03 and the magnetic field of the armature winding 02 are superimposed in the magnetic circuit.

[0018] The rotor core 01 is a pure salient pole core structure with no permanent magnets and no windings.

[0019] The permanent magnet 03 is located on the yoke of the stator core 04 near the motor housing.

[0020] The stator core 04 is provided with multiple sets of stator teeth, and the armature winding 02 is wound on the stator teeth.

[0021] An air gap is formed between the rotor core 01 salient pole and the stator teeth.

[0022] The motor housing surrounds the stator core 04 and the rotor core 01.

[0023] The injection-molded part 05 is fixed to the stator core 04 or the outer casing. This utility model discloses a high-power-density hybrid excitation reluctance motor structure. During operation, the armature winding 02 is first energized to generate an electrically excited magnetic field, while the permanent magnet 03 simultaneously generates a constant magnetic field. Then, the two magnetic fields are superimposed in the yoke of the stator core 04, the air gap, and the rotor core 01. The enhanced magnetic flux then drives the rotor core 01 to rotate. After completion, heat is dissipated through the outer casing, maintaining stable motor operation.

[0024] The permanent magnet 03 can be made of neodymium iron boron or ferrite permanent magnet material and is fixed to the motor housing by the yoke slot of the stator core 04.

[0025] The main functions achieved by this utility model are: to enhance the air gap magnetic flux density by using permanent magnets, thereby improving power density and efficiency; to reduce costs and improve dynamic balance performance by using a rotor without permanent magnets; and to improve heat dissipation and reduce the risk of demagnetization by arranging permanent magnets in the stator.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high power density hybrid excitation reluctance motor structure, comprising a rotor core (01), an armature winding (02), and a stator core (04), wherein the stator core (04) includes a stator yoke, stator teeth, and the armature winding (02), and the rotor core (01) is a salient pole core structure; characterized in that, It also includes a permanent magnet (03) embedded in the slot of the yoke between the teeth of the stator core (04), and the magnetic field of the permanent magnet (03) and the armature winding (02) are superimposed in the magnetic circuit.

2. The high power density hybrid excitation reluctance motor structure as described in claim 1, characterized in that, The rotor core (01) is a pure salient pole core structure with no permanent magnets and no windings.

3. The high power density hybrid excitation reluctance motor structure as described in claim 1, characterized in that, The permanent magnet (03) is located on the yoke of the stator core (04) near the motor housing.

4. The high power density hybrid excitation reluctance motor structure as described in claim 3, characterized in that, The stator core (04) is provided with multiple sets of stator teeth, and the armature winding (02) is wound on the stator teeth.

5. The high power density hybrid excitation reluctance motor structure as described in claim 2, characterized in that, An air gap is formed between the salient pole of the rotor core (01) and the stator teeth.

6. The high power density hybrid excitation reluctance motor structure as described in claim 4, characterized in that, The motor housing surrounds the stator core (04) and the rotor core (01).

7. The high power density hybrid excitation reluctance motor structure as described in claim 6, characterized in that, The injection molded part (05) is fixed to the stator core (04) or the outer shell.

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