Parallel hybrid excitation compound motor with outer stator poles

Abstract

The invention provides an external stator magnetic pole parallel type hybrid excitation composite motor which relates to the technical field of hybrid excitation composite motors, with the object of solving the problem of small output torque of conventional hybrid excitation motors. In the motor, excitation windings are wound onto the iron core of an excitation external stator to make the motor free of brushes. The excitation windings are in a certain form of series connection to ensure that during direct current charging, the right hand rule is obeyed. The direction of the excitation flux linkage is corresponding to a permanent magnet magnetizing direction; by changing the direction of excitation current, the motor is made to work in a magnetism increased or a magnetism weakened state. By changing the direct current in excitation coils, the magnetic field of the motor can be widely adjusted. In addition to that, the motor enables the armature winding induction potential to be adjusted by adjusting the excitation current and can offset the magnetic field produced by a permanent magnet part through the adjustment of excitation current when the armature winding malfunctions for short circuit, therefore realizing high efficient demagnetization when the armature winding of a motor breaks down for short circuit.

Description

technical field

[0001] The invention relates to the field of hybrid excitation compound motors. Background technique

[0002] In recent years, due to the development of rare earth permanent magnet materials with the characteristics of high remanence density, high coercive force, and high magnetic energy product, compared with traditional electric excitation motors, permanent magnet motors have small volume, simple structure, It has the advantages of convenient maintenance, high efficiency, high power factor, and high power density in terms of performance. However, because the permanent magnet motor uses a single permanent magnet for excitation, it is difficult to adjust the magnetic field. The traditional electric excitation motor can easily adjust the air gap magnetic field by adjusting the DC or AC excitation current, but its structure is complex, the output torque is small, and the power factor is low.

[0003] The main feature of the hybrid excitation motor is that the ...

Examples

specific Embodiment approach 1

[0019] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this specific embodiment, the outer stator magnetic pole parallel type hybrid excitation composite motor described in this specific embodiment includes an inner stator 8, an outer stator and a magnetic flux ring rotor 7, and the magnetic flux ring rotor 7 is located between the inner stator 8 and the outer stator , and fixed on one end of the output shaft 11 of the magnetic ring rotor through a bracket, the other end of the output shaft 11 of the magnetic ring rotor passes through the right end cover of the motor casing 4, and is connected to it through a bearing for rotation, the magnetic ring The rotor 7 is separated from the inner stator 8 and the outer stator by a radial air gap;

[0020] The inner stator 8 is fixed on the inner stator output shaft 12, and one end of the inner stator output shaft 12 passes through the left end cover of the motor casing 4, and is connected to it in rotation th...

specific Embodiment approach 2

[0028] Embodiment 2. The difference between this embodiment and the outer stator pole-parallel hybrid excitation compound motor described in Embodiment 1 is that both the permanent magnet 5-2 and the excitation winding 6-2 are of C-shaped structure.

[0029] In this embodiment, the permanent magnets 5-2, the outer stator yoke and the outer stator teeth are arranged in a C-shaped structure, and the Halbeck 90° magnetization method is used to cut each permanent magnet into three parts, and the middle part is radially filled. Magnetic, both sides are magnetized in the circumferential direction and a non-magnetic material is inserted between it and the core to reduce magnetic flux leakage and improve the utilization rate of the permanent magnet or adopt a radial magnetization method, such as Figure 8 and Figure 9 shown.

specific Embodiment approach 3

[0030] Specific Embodiment 3. The difference between this specific embodiment and the outer stator pole-parallel hybrid excitation composite motor described in specific embodiment 1 is that the permanent magnet outer stator 5 adopts a built-in tangential magnetic steel structure or a surface-mounted magnetic steel Structural realization.

technical field

[0001] The invention relates to the field of hybrid excitation compound motors. Background technique

[0002] In recent years, due to the development of rare earth permanent magnet materials with the characteristics of high remanence density, high coercive force, and high magnetic energy product, compared with traditional electric excitation motors, permanent magnet motors have small volume, simple structure, It has the advantages of convenient maintenance, high efficiency, high power factor, and high power density in terms of performance. However, because the permanent magnet motor uses a single permanent magnet for excitation, it is difficult to adjust the magnetic field. The traditional electric excitation motor can easily adjust the air gap magnetic field by adjusting the DC or AC excitation current, but its structure is complex, the output torque is small, and the power factor is low.

[0003] The main feature of the hybrid excitation motor is that the ...

Examples

specific Embodiment approach 1

[0019] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this specific embodiment, the outer stator magnetic pole parallel type hybrid excitation composite motor described in this specific embodiment includes an inner stator 8, an outer stator and a magnetic flux ring rotor 7, and the magnetic flux ring rotor 7 is located between the inner stator 8 and the outer stator , and fixed on one end of the output shaft 11 of the magnetic ring rotor through a bracket, the other end of the output shaft 11 of the magnetic ring rotor passes through the right end cover of the motor casing 4, and is connected to it through a bearing for rotation, the magnetic ring The rotor 7 is separated from the inner stator 8 and the outer stator by a radial air gap;

[0020] The inner stator 8 is fixed on the inner stator output shaft 12, and one end of the inner stator output shaft 12 passes through the left end cover of the motor casing 4, and is connected to it in rotation th...

specific Embodiment approach 2

[0028] Embodiment 2. The difference between this embodiment and the outer stator pole-parallel hybrid excitation compound motor described in Embodiment 1 is that both the permanent magnet 5-2 and the excitation winding 6-2 are of C-shaped structure.

[0029] In this embodiment, the permanent magnets 5-2, the outer stator yoke and the outer stator teeth are arranged in a C-shaped structure, and the Halbeck 90° magnetization method is used to cut each permanent magnet into three parts, and the middle part is radially filled. Magnetic, both sides are magnetized in the circumferential direction and a non-magnetic material is inserted between it and the core to reduce magnetic flux leakage and improve the utilization rate of the permanent magnet or adopt a radial magnetization method, such as Figure 8 and Figure 9 shown.

specific Embodiment approach 3

[0030] Specific Embodiment 3. The difference between this specific embodiment and the outer stator pole-parallel hybrid excitation composite motor described in specific embodiment 1 is that the permanent magnet outer stator 5 adopts a built-in tangential magnetic steel structure or a surface-mounted magnetic steel Structural realization.

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