Generator and voltage-stabilized power generation system for reducing magnetic leakage at the end of a permanent magnet

Abstract

The present invention provides a generator and a voltage-stabilized power generation system for reducing the magnetic leakage at the end of a permanent magnet, belonging to the technical field of automotive motor electrical appliances. Even numbers of first rectangular slots are evenly distributed along the circumferential direction of the rotor core. The center line of the long side of the first rectangular slot coincides with the diameter direction of the rotor core. The first rectangular slot communicates with the outer circle of the rotor core. A first inclined straight slot is provided on the left side of the first rectangular slot. A magnetic isolation slot is provided inside the first inclined straight slot. The magnetic isolation slot is along the diameter direction. A first V-shaped slot is provided on the right side of the first rectangular slot. A second V-shaped slot is provided on the right side of the first V-shaped slot. A second rectangular slot is provided on the right side of the second V-shaped slot. The second rectangular slot has a tangential structure. A second inclined straight slot is provided on the right side of the second rectangular slot. In the generator, the end parts of the permanent magnets in a single magnetic pole respectively adopt the method of setting inner and outer magnetic isolation air gaps, which can reduce the magnetic leakage at the end of the permanent magnet, solve the problems of large distortion rate of the magnetic density waveform and large magnetic resistance of the magnetic circuit in the traditional combined magnetic pole, and improve the output voltage quality and efficiency of the generator.

Description

Technical Field

[0001] The present invention provides a generator and a voltage-stabilized power generation system for reducing magnetic leakage at the end of a permanent magnet, belonging to the technical field of automotive motor electrical appliances. Background Art

[0002] At present, the rotor of a permanent magnet motor mostly uses a uniform magnetic pole structure. As in the prior art, a Chinese patent announced, a magnetic pole punching sheet and a permanent magnet generator rotor core using the magnetic pole punching sheet, application number: 201310467230.4, discloses a structure in which the permanent magnet generator rotor core is segmented axially, and the magnetic pole symmetry axes of adjacent core segments are staggered and offset, which can reduce torque ripple and reduce accessory losses. However, the permanent magnets of the rotor of this structure are arranged in a straight line, and the magnetic concentration ability is poor. Adjacent core segments are staggered by a certain angle, and the manufacturing process is complex. A Chinese patent announced, a permanent magnet generator rotor punching sheet, application number: 202021017473.X, discloses a rotor structure in which four interpolar grooves are evenly spaced on the outer circumference of the rotor punching sheet body, and the magnetic regions divided by the interpolar grooves are provided with a plurality of bread-shaped permanent magnet filling grooves along the outer arc edge. This structure has more stable excitation, obtains a higher magnetic density in the middle of the magnetic pole, and has a high motor power density. However, the design of the interpolar grooves increases the complexity of the process design and increases the air gap magnetic resistance, resulting in a decrease in motor efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: on the premise of ensuring that the processing procedures, process difficulty and motor cost do not increase significantly, overcoming the deficiencies of the prior art, providing a generator and a voltage-stabilized power generation system for reducing magnetic leakage at the end of a permanent magnet. The single magnetic pole of this generator has an asymmetric structure, and the end parts of the permanent magnets in a single magnetic pole respectively adopt a method of setting internal and external magnetic isolation air gaps. While reducing magnetic leakage at the end of the permanent magnet, it solves the problems of large distortion rate of the magnetic density waveform and large magnetic resistance of the magnetic circuit in traditional combined magnetic poles, improves the output voltage quality and efficiency of the generator, divides the same magnetic pole into three pole arcs, and provides excitation in three sections, effectively improving the sinusoidality of the air gap magnetic density waveform.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a generator for reducing magnetic leakage at the end of a permanent magnet, including a voltage-stabilizing controller, a rotating shaft, a rear end cover, a front end cover, a stator, a rotor core, a first inclined straight slot, a magnetic isolation slot, a pole shoe, a screw, a first rectangular slot, a round rivet, a first V-shaped slot, a second V-shaped slot, a second rectangular slot, a second inclined straight slot, and a permanent magnet, characterized in that:

[0005] The rotor core is evenly distributed with an even number of first rectangular slots along the circumferential direction. The center line of the long side of the first rectangular slot coincides with the diameter direction of the rotor core, and the first rectangular slot communicates with the outer circle of the rotor core;

[0006] On the left side of the first rectangular groove, there is a first inclined straight groove. The outer end of the first inclined straight groove extends towards the outer circle of the rotor core, and there is no connection between the outer end of the first inclined straight groove and the outer circle of the rotor core.

[0007] At the inner end of the first inclined straight groove, there is a magnetic isolation groove. The magnetic isolation groove is along the diameter direction of the rotor core, and there is a non-connected distance of 1.5 mm between the magnetic isolation groove and the inner circle of the rotor core.

[0008] On the right side of the first rectangular groove, there is a first V-shaped groove. The included angle of the first V-shaped groove is 30° - 40°. There is no connection between the outer end of the first V-shaped groove and the outer circle of the rotor core, and the proximal end of the first V-shaped groove is connected.

[0009] On the right side of the first V-shaped groove, there is a second V-shaped groove. There is no connection between the outer end of the second V-shaped groove and the outer circle of the rotor core, and the proximal end of the second V-shaped groove is connected.

[0010] On the right side of the inner end of the second V-shaped groove, there is a second rectangular groove, and the second rectangular groove is of a tangential structure.

[0011] On the right side of the second rectangular groove, there is a second inclined straight groove. The outer end of the second inclined straight groove extends towards the outer circle of the rotor core, and there is a non-connected distance of 1.5 mm between the outer end of the second inclined straight groove and the outer circle of the rotor core.

[0012] The arc length between the proximal ends of the first inclined straight groove and the first rectangular groove is equal to the arc length between the outer ends of the first V-shaped groove.

[0013] Magnets are placed in the first inclined straight groove, the right side of the first V-shaped groove, the left side of the second V-shaped groove, the first rectangular groove, the second rectangular groove, and the second inclined straight groove.

[0014] Screws and round rivets fix the pole shoe and the magnet in the first rectangular groove within the first rectangular groove.

[0015] The first V-shaped groove and the second V-shaped groove are symmetric about the axis of symmetry of the center line of the magnetic pole where the first V-shaped groove is located and the center line of the magnetic pole where the second V-shaped groove is located.

[0016] The first inclined straight groove and the second inclined straight groove are symmetric about the axis of symmetry of the center line of the magnetic pole where the first inclined straight groove is located and the center line of the magnetic pole where the second inclined straight groove is located.

[0017] The polarity of the outer side of the magnet in the first rectangular groove is the same as the polarity of the outer side of the magnet in the first inclined straight groove on the left side of the first rectangular groove, and the polarity of the outer side of the magnet in the first rectangular groove is the same as the polarity of the outer side of the magnet in the first V-shaped groove on the right side of the first rectangular groove.

[0018] The polarity of the outer side of the magnet in the second rectangular groove is the same as that of the outer side of the magnet in the second V-shaped groove on the left side of the second rectangular groove, and the polarity of the outer side of the magnet in the second rectangular groove is the same as that of the outer side of the magnet in the second inclined straight groove on the right side of the second rectangular groove;

[0019] The polarity of the outer side of the magnet in the adjacent first rectangular groove is opposite to that of the outer side of the magnet in the second rectangular groove.

[0020] The length of the first rectangular groove is greater than the length of the pole shoe, and the width of the first rectangular groove is equal to the sum of the thickness of the pole shoe and the thickness of the magnet in the first rectangular groove.

[0021] There is a non-connected distance of 1.5 mm between the inner end of the first inclined straight groove and the outer end of the magnetic isolation groove, a non-connected distance of 1.5 mm between the inner end of the second V-shaped groove and the left end of the second rectangular groove, and a non-connected distance of 1.5 mm between the right end of the second rectangular groove and the inner end of the second inclined straight groove;

[0022] There is a non-connected distance of 1.5 mm between the proximal ends of the first V-shaped groove and the second V-shaped groove;

[0023] There is a non-connected distance of 1.5 mm between the proximal ends of the first rectangular groove and the first V-shaped groove;

[0024] A voltage-stabilized power generation system includes a generator and a voltage-stabilized controller, characterized in that the generator is the generator with low magnetic leakage at the end of the magnet.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] (1) By respectively adopting the method of setting internal and external magnetic isolation air gaps at the end parts of the magnets in a single magnetic pole, while reducing the magnetic leakage at the end of the magnet, the problems of large distortion rate of the magnetic density waveform and large magnetic resistance of the magnetic circuit in the traditional combined magnetic pole are solved, and the output voltage quality and efficiency of the generator are improved;

[0027] (2) The arrangement of the straight magnets is adopted to increase the magnetic field intensity in the middle of the magnetic pole, the V-shaped permanent magnet is placed to enhance the magnetic concentration ability, and the setting of the magnetic isolation groove reduces the weight of the rotor and increases the power density of the generator;

[0028] (3) The permanent magnet provides excitation in sections, which is beneficial to adjusting the magnetic field distribution, weakening the cogging torque, and improving the output performance. Description of the Drawings

[0029] Figure 1 is a schematic diagram of the rotor structure of the present invention.

[0030] Figure 2 is a schematic diagram of the generator structure of the present invention.

[0031] In the figure: 1. Voltage stabilizing controller; 2. Rotating shaft; 3. Rear end cover; 4. Front end cover; 5. Stator; 6. Rotor core; 7. First inclined straight slot; 8. Magnetic isolation slot; 9. Pole shoe; 10. Screw; 11. First rectangular slot; 12. Round rivet; 13. First V-shaped slot; 14. Second V-shaped slot; 15. Second rectangular slot; 16. Second inclined straight slot. Detailed implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] A generator for reducing magnetic leakage at the end of a permanent magnet includes a voltage stabilizing controller 1, a rotating shaft 2, a rear end cover 3, a front end cover 4, a stator 5, a rotor core 6, a first inclined straight slot 7, a magnetic isolation slot 8, a pole shoe 9, a screw 10, a first rectangular slot 11, a round rivet 12, a first V-shaped slot 13, a second V-shaped slot 14, a second rectangular slot 15, a second inclined straight slot 16, and a permanent magnet, and is characterized in that:

[0034] The rotor core 6 is evenly provided with an even number of first rectangular slots 11 in the circumferential direction. The center line of the long side of the first rectangular slot 11 coincides with the diameter direction of the rotor core 6, and the first rectangular slot 11 communicates with the outer circle of the rotor core 6;

[0035] A first inclined straight slot 7 is provided on the left side of the first rectangular slot 11. The outer end of the first inclined straight slot 7 extends towards the outer circle of the rotor core 6, and there is no communication between the outer end of the first inclined straight slot 7 and the outer circle of the rotor core 6;

[0036] A magnetic isolation slot 8 is provided at the inner end of the first inclined straight slot 7. The magnetic isolation slot 8 is along the diameter direction of the rotor core 6, and there is a non-communication distance of 1.5 mm between the magnetic isolation slot 8 and the inner circle of the rotor core 6;

[0037] A first V-shaped slot 13 is provided on the right side of the first rectangular slot 11. The included angle of the first V-shaped slot 13 is 30° - 40°. There is no communication between the outer end of the first V-shaped slot 13 and the outer circle of the rotor core 6, and the proximal end of the first V-shaped slot 13 is communicated;

[0038] A second V-shaped slot 14 is provided on the right side of the first V-shaped slot 13. There is no communication between the outer end of the second V-shaped slot 14 and the outer circle of the rotor core 6, and the proximal end of the second V-shaped slot 14 is communicated;

[0039] A second rectangular slot 15 is provided on the right side of the inner end of the second V-shaped slot 14. The second rectangular slot 15 has a tangential structure;

[0040] A second inclined straight slot 16 is provided on the right side of the second rectangular slot 15. The outer end of the second inclined straight slot 16 extends towards the outer circle of the rotor core 6, and there is a non-communication distance of 1.5 mm between the outer end of the second inclined straight slot 16 and the outer circle of the rotor core 6;

[0041] The arc length between the proximal ends of the first inclined linear groove 7 and the first rectangular groove 11 is equal to the arc length between the outer ends of the first V-shaped grooves 13.

[0042] Magnets are placed in the first inclined linear groove 7, the right side of the first V-shaped groove 13, the left side of the second V-shaped groove 14, the first rectangular groove 11, the second rectangular groove 15, and the second inclined linear groove 16.

[0043] The screw 10 and the round rivet 12 fix the pole shoe 9 and the magnet in the first rectangular groove 11 within the first rectangular groove 11.

[0044] The first V-shaped groove 13 and the second V-shaped groove 14 are symmetric about the axis of symmetry of the center line of the magnetic pole where the first V-shaped groove 13 is located and the center line of the magnetic pole where the second V-shaped groove 14 is located.

[0045] The first inclined linear groove 7 and the second inclined linear groove 16 are symmetric about the axis of symmetry of the center line of the magnetic pole where the first inclined linear groove 7 is located and the center line of the magnetic pole where the second inclined linear groove 16 is located.

[0046] The polarity of the outer side of the magnet in the first rectangular groove 11 is the same as the polarity of the outer side of the magnet in the first inclined linear groove 7 on the left side of the first rectangular groove 11, and the polarity of the outer side of the magnet in the first rectangular groove 11 is the same as the polarity of the outer side of the magnet in the first V-shaped groove 13 on the right side of the first rectangular groove 11.

[0047] The polarity of the outer side of the magnet in the second rectangular groove 15 is the same as the polarity of the outer side of the magnet in the second V-shaped groove 14 on the left side of the second rectangular groove 15, and the polarity of the outer side of the magnet in the second rectangular groove 15 is the same as the polarity of the outer side of the magnet in the second inclined linear groove 16 on the right side of the second rectangular groove 15.

[0048] The polarity of the outer side of the magnet in the adjacent first rectangular groove 11 is opposite to the polarity of the outer side of the magnet in the second rectangular groove 15.

[0049] The length of the first rectangular groove 11 is greater than the length of the pole shoe 9, and the width of the first rectangular groove 11 is equal to the sum of the thickness of the pole shoe 9 and the thickness of the magnet in the first rectangular groove 11.

[0050] There is a non-connected distance of 1.5 mm between the inner end of the first inclined linear groove 7 and the outer end of the magnetic isolation groove 8, a non-connected distance of 1.5 mm between the inner end of the second V-shaped groove 14 and the left end of the second rectangular groove 15, and a non-connected distance of 1.5 mm between the right end of the second rectangular groove 15 and the inner end of the second inclined linear groove 16.

[0051] There is a non-connected distance of 1.5 mm between the proximal ends of the first V-shaped groove 13 and the second V-shaped groove 14.

[0052] There is a non-connected distance of 1.5 mm between the proximal ends of the first rectangular groove 11 and the first V-shaped groove 13.

[0053] A voltage-stabilized power generation system, comprising a generator and a voltage-stabilized controller, is characterized in that: the generator is a generator with end leakage magnetic flux of low magnetic steel.

Claims

1. A generator for reducing magnetic leakage at the end of a magnetic steel, comprising a voltage stabilizing controller (1), a rotating shaft (2), a rear end cover (3), a front end cover (4), a stator (5), a rotor core (6), a first oblique straight groove (7), a magnetic isolation groove (8), a pole shoe (9), a screw (10), a first rectangular groove (11), a circular rivet (12), a first V-shaped groove (13), a second V-shaped groove (14), a second rectangular groove (15), a second oblique straight groove (16), and a magnetic steel, characterized in that: The rotor core (6) is evenly distributed with an even number of first rectangular slots (11) along the circumferential direction, the center lines of the long sides of the first rectangular slots (11) coincide with the diameter direction of the rotor core (6), and the first rectangular slots (11) are connected to the outer circle of the rotor core (6); A first oblique straight-line groove (7) is provided on the left side of the first rectangular groove (11), the outer end of the first oblique straight-line groove (7) extending toward the outer circle of the rotor iron core (6), and the outer end of the first oblique straight-line groove (7) is not connected to the outer circle of the rotor iron core (6); A magnetic isolation groove (8) is provided at the inner end of the first oblique straight groove (7), the magnetic isolation groove (8) is along the diameter direction of the rotor core (6), and there is a non-connected distance of 1.5 mm between the magnetic isolation groove (8) and the inner circle of the rotor core (6); A first V-shaped groove (13) is provided on the right side of the first rectangular groove (11); the included angle of the first V-shaped groove (13) is 30° to 40°; the outer end of the first V-shaped groove (13) is not connected to the outer circle of the rotor core (6); and the proximal end of the first V-shaped groove (13) is connected; A second V-shaped groove (14) is provided on the right side of the first V-shaped groove (13); the outer end of the second V-shaped groove (14) is not connected to the outer circle of the rotor core (6), and the proximal end of the second V-shaped groove (14) is connected; A second rectangular groove (15) is provided on the right side of the inner end of the second V-shaped groove (14), and the second rectangular groove (15) is in a tangential structure; A second oblique straight-line groove (16) is provided on the right side of the second rectangular groove (15), the outer end of the second oblique straight-line groove (16) extending toward the outer circle of the rotor core (6), and a non-connected distance of 1.5 mm exists between the outer end of the second oblique straight-line groove (16) and the outer circle of the rotor core (6); The arc length between the first oblique I-shaped groove (7) and the proximal end of the first rectangular groove (11) is equal to the arc length between the outer ends of the first V-shaped groove (13); Magnetic steel is placed in the first oblique straight groove (7), the right side of the first V-shaped groove (13), the left side of the second V-shaped groove (14), the first rectangular groove (11), the second rectangular groove (15), and the second oblique straight groove (16); The screws (10) and the circular rivets (12) fix the pole shoe (9) and the magnetic steel in the first rectangular groove (11) in the first rectangular groove (11).

2. A generator for reducing magnetic leakage at the ends of magnetic steel according to claim 1, characterized in that: The first V-shaped groove (13) and the second V-shaped groove (14) are symmetrical about a symmetry axis of a magnetic pole center line where the first V-shaped groove (13) is located and a magnetic pole center line where the second V-shaped groove (14) is located; The first oblique straight groove (7) and the second oblique straight groove (16) are symmetrical about the symmetry axis of the magnetic pole center line where the first oblique straight groove (7) is located and the magnetic pole center line where the second oblique straight groove (16) is located.

3. A generator for reducing magnetic leakage at the ends of magnetic steel according to claim 1, characterized in that: The polarity of the outer side surface of the magnetic steel inside the first rectangular groove (11) is the same as the polarity of the outer side surface of the magnetic steel inside the first oblique straight groove (7) adjacent to the left side of the first rectangular groove (11), and the polarity of the outer side surface of the magnetic steel inside the first rectangular groove (11) is the same as the polarity of the outer side surface of the magnetic steel inside the first V-shaped groove (13) adjacent to the right side of the first rectangular groove (11); The polarity of the outer side surface of the inner magnetic steel of the second rectangular groove (15) is the same as the polarity of the outer side surface of the inner magnetic steel of the second V-shaped groove (14) adjacent to the left side of the second rectangular groove (15), and the polarity of the outer side surface of the inner magnetic steel of the second rectangular groove (15) is the same as the polarity of the outer side surface of the inner magnetic steel of the second oblique straight groove (16) adjacent to the right side of the second rectangular groove (15); The polarity of the outer side surface of the magnetic steel in the adjacent first rectangular slot (11) is opposite to the polarity of the outer side surface of the magnetic steel in the second rectangular slot (15).

4. A generator for reducing magnetic leakage at the ends of magnetic steel according to claim 1, characterized in that: The length of the first rectangular slot (11) is greater than the length of the pole shoe (9), and the width of the first rectangular slot (11) is equal to the sum of the thickness of the pole shoe (9) and the thickness of the magnetic steel in the first rectangular slot (11).

5. A generator for reducing magnetic leakage at the ends of magnetic steel according to claim 1, characterized in that: There is a non-connected distance of 1.5 mm between the inner end of the first oblique straight groove (7) and the outer end of the magnetic isolation groove (8); There is a non-connected distance of 1.5 mm between the proximal ends of the first rectangular groove (11) and the first V-shaped groove (13); There is a non-connected distance of 1.5 mm between the proximal ends of the first V-shaped groove (13) and the second V-shaped groove (14); There is a non-connected distance of 1.5 mm between the inner end of the second V-shaped groove (14) and the left end of the second rectangular groove (15), and there is a non-connected distance of 1.5 mm between the right end of the second rectangular groove (15) and the inner end of the second oblique straight groove (16).

6. A voltage-stabilizing power generation system, comprising a generator and a voltage-stabilizing controller, characterized in that: The generator is a low magnetic steel end leakage generator as described in any one of claims 1-5.

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