Generator capable of reducing magnetic leakage at end part of magnetic steel and voltage-stabilizing power generation system

Abstract

The invention provides a generator capable of reducing magnetic steel end magnetic leakage and a voltage stabilization power generation system, and belongs to the technical field of automobile motor electric appliances. An even number of first rectangular grooves are evenly distributed in the rotor core in the circumferential direction, the center lines of the long sides of the first rectangular grooves coincide with the diameter direction of the rotor core, the first rectangular grooves are communicated with the outer circle of the rotor core, first oblique-line-shaped grooves are formed in the left sides of the first rectangular grooves, magnetic isolation grooves are formed in the inner sides of the first oblique-line-shaped grooves, and the magnetic isolation grooves are distributed in the diameter direction. A first V-shaped groove is formed in the right side of the first rectangular groove, a second V-shaped groove is formed in the right side of the first V-shaped groove, a second rectangular groove is formed in the right side of the second V-shaped groove, the second rectangular groove is of a tangential structure, and a second inclined linear groove is formed in the right side of the second rectangular groove. The magnetic steel end part in the single magnetic pole of the generator respectively adopts a mode of arranging the inward and outward magnetic isolation air gaps, so that the magnetic leakage of the magnetic steel end part is reduced, the problems of large flux density waveform distortion rate and large magnetic circuit magnetic resistance of the traditional combined magnetic pole are solved, and the output voltage quality and efficiency of the generator are improved.

Description

Technical Field

[0001] The invention provides a generator and a voltage-stabilizing power generation system capable of reducing magnetic leakage at the end of a magnetic steel, belonging to the technical field of automobile motors and electrical appliances. Background Art

[0002] At present, permanent magnet motor rotors mostly use uniform magnetic pole structures, such as the prior art, the published Chinese patent, 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 rotor core of a permanent magnet generator is segmented in the axial direction, and the magnetic pole symmetry axes of adjacent core segments are staggered and offset, which can reduce torque pulsation and reduce accessory losses. However, the rotor magnet of this structure is arranged in a straight line, the magnetic field concentration ability is poor, the adjacent core segments are staggered at a certain angle, and the manufacturing process is complicated. The announced Chinese patent, a permanent magnet generator rotor punching, application number: 202021017473.X, discloses a rotor structure in which four interpole grooves are evenly spaced on the outer periphery of the circumferential surface of the rotor punching body, and the magnetic regions divided by the interpole grooves are provided with a number of bread-shaped permanent magnet filling slots along the outer arc edge. The excitation of this structure is more stable, a higher intermediate density of the magnetic poles is obtained, and the power density of the motor is high. However, the design of the interpole grooves increases the complexity of the process design, increases the air gap magnetic resistance, and reduces the efficiency of the motor. Summary of the invention

[0003] The technical problem to be solved by the present invention is: under the premise of ensuring that the processing procedures are not increased, the process difficulty and the motor cost are not greatly changed, the shortcomings of the prior art are overcome, and a generator and a voltage-stabilizing power generation system are provided for reducing the magnetic leakage at the ends of the magnetic steel. The single magnetic pole of the generator has an asymmetric structure, and the ends of the magnetic steel in a single magnetic pole are respectively provided with inward and outward magnetic isolation air gaps. While reducing the magnetic leakage at the ends of the magnetic steel, the problems of large magnetic flux density waveform distortion rate and large magnetic circuit magnetic resistance of the traditional combined magnetic pole are solved, the output voltage quality and efficiency of the generator are improved, the same magnetic pole is divided into three pole arcs, and excitation is provided in three sections, which effectively improves the sinusoidal nature of the air gap magnetic flux density waveform.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a generator for reducing magnetic leakage at the end of a magnetic steel, comprising a voltage stabilizing controller, a rotating shaft, a rear end cover, a front end cover, a stator, a rotor core, a first oblique straight groove, a magnetic isolation groove, a pole shoe, a screw, a first rectangular groove, a circular rivet, a first V-shaped groove, a second V-shaped groove, a second rectangular groove, a second oblique straight groove, and a magnetic steel, characterized in that: The rotor core is evenly distributed with an even number of first rectangular slots along the circumferential direction, the center lines of the long sides of the first rectangular slots coincide with the diameter direction of the rotor core, and the first rectangular slots are connected to the outer circle of the rotor core; A first oblique straight-line groove is provided on the left side of the first rectangular groove, the outer end of the first oblique straight-line groove extends toward the outer circle of the rotor core, and the outer end of the first oblique straight-line groove is not connected to the outer circle of the rotor core; A magnetic isolation groove is provided at the inner end of the first oblique straight groove. The magnetic isolation groove is along the diameter direction of the rotor core. There is a non-connected distance of 1.5 mm between the magnetic isolation groove and the inner circle of the rotor core. A first V-shaped groove is provided on the right side of the first rectangular groove, the included angle of the first V-shaped groove is 30°-40°, the outer end of the first V-shaped groove is not connected to the outer circle of the rotor core, and the proximal end of the first V-shaped groove is connected; A second V-shaped groove is provided on the right side of the first V-shaped groove, the outer end of the second V-shaped groove is not connected to the outer circle of the rotor core, and the proximal end of the second V-shaped groove is connected; A second rectangular groove is provided on the right side of the inner end of the second V-shaped groove, and the second rectangular groove is a tangential structure; A second oblique straight groove is provided on the right side of the second rectangular groove, the outer end of the second oblique straight groove extends toward the outer circle of the rotor core, and there is a 1.5mm non-connected distance between the outer end of the second oblique straight groove and the outer circle of the rotor core; The arc length between the first oblique I-shaped groove and the proximal end of the first rectangular groove is equal to the arc length between the outer ends of the first V-shaped groove; Magnetic steel is placed in the first oblique 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 oblique straight groove; The pole piece and the magnetic steel in the first rectangular groove are fixed in the first rectangular groove by screws and circular rivets.

[0005] The first V-shaped groove and the second V-shaped groove are symmetrical about a symmetry axis of a magnetic pole center line where the first V-shaped groove is located and a magnetic pole center line where the second V-shaped groove is located; The first oblique straight groove and the second oblique straight groove are symmetrical about a symmetry axis of a magnetic pole center line where the first oblique straight groove is located and a magnetic pole center line where the second oblique straight groove is located.

[0006] The polarity of the outer side surface of the magnetic steel in the first rectangular slot is the same as the polarity of the outer side surface of the magnetic steel in the first oblique straight slot on the left side of the first rectangular slot, and the polarity of the outer side surface of the magnetic steel in the first rectangular slot is the same as the polarity of the outer side surface of the magnetic steel in the first V-shaped slot on the right side of the first rectangular slot; The polarity of the outer side surface of the magnetic steel in the second rectangular groove is the same as the polarity of the outer side surface of the magnetic steel in the second V-shaped groove on the left side of the second rectangular groove, and the polarity of the outer side surface of the magnetic steel in the second rectangular groove is the same as the polarity of the outer side surface of the magnetic steel in the second oblique straight groove on the right side of the second rectangular groove; The polarity of the outer side surface of the magnetic steel in the adjacent first rectangular slot is opposite to the polarity of the outer side surface of the magnetic steel in the second rectangular slot.

[0007] The length of the first rectangular slot is greater than the length of the pole shoe, and the width of the first rectangular slot is equal to the sum of the thickness of the pole shoe and the thickness of the magnetic steel in the first rectangular slot.

[0008] There is a 1.5mm non-connected distance between the inner end of the first oblique straight groove and the outer end of the magnetic isolation groove, a 1.5mm non-connected distance between the inner end of the second V-shaped groove and the left end of the second rectangular groove, and a 1.5mm non-connected distance between the right end of the second rectangular groove and the inner end of the second oblique straight groove; 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; 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; A voltage-stabilized power generation system includes a generator and a voltage-stabilized controller, wherein the generator is a generator with low magnetic steel end leakage flux.

[0009] Compared with the prior art, the present invention has the following technical effects: (1) The ends of the magnetic steel in a single magnetic pole are provided with inward and outward magnetic air gaps, which reduces magnetic leakage at the ends of the magnetic steel, solves the problems of large magnetic flux waveform distortion rate and large magnetic circuit resistance of the traditional combined magnetic pole, and improves the output voltage quality and efficiency of the generator; (2) The straight-line magnet arrangement increases the magnetic field strength in the middle of the magnetic pole, the V-shaped permanent magnet placement enhances the magnetic field concentration capability, and the magnetic isolation groove arrangement reduces the rotor weight and increases the generator power density; (3) The segmented excitation provided by the permanent magnet is beneficial to adjust the magnetic field distribution, weaken the cogging torque and improve the output performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the rotor structure of the present invention.

[0011] Figure 2 It is a schematic diagram of the structure of the generator of the present invention.

[0012] In the figure: 1. voltage regulator controller; 2. rotating shaft; 3. rear end cover; 4. front end cover; 5. stator; 6. rotor core; 7. first oblique I-shaped groove; 8. magnetic isolation groove; 9. pole shoe; 10. screw; 11. first rectangular groove; 12. round rivet; 13. first V-shaped groove; 14. second V-shaped groove; 15. second rectangular groove; 16. second oblique I-shaped groove. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] A generator for reducing magnetic leakage at the end of a magnetic steel comprises 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 groove 7 is provided on the left side of the first rectangular groove 11, and the outer end of the first oblique straight groove 7 extends toward the outer circle of the rotor core 6, and the outer end of the first oblique straight groove 7 is not connected to the outer circle of the rotor 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. 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 a tangential structure; A second oblique straight groove 16 is provided on the right side of the second rectangular groove 15, and the outer end of the second oblique straight groove 16 extends toward the outer circle of the rotor core 6, and there is a 1.5mm non-connected distance between the outer end of the second oblique straight 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 round rivets 12 fix the pole piece 9 and the magnetic steel in the first rectangular groove 11 in the first rectangular groove 11 .

[0015] The first V-shaped groove 13 and the second V-shaped groove 14 are symmetrical about the symmetry axis of the magnetic pole center line where the first V-shaped groove 13 is located and the 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.

[0016] The polarity of the outer side surface of the magnetic steel in the first rectangular groove 11 is the same as the polarity of the outer side surface of the magnetic steel in the first oblique straight groove 7 on the left side of the first rectangular groove 11, and the polarity of the outer side surface of the magnetic steel in the first rectangular groove 11 is the same as the polarity of the outer side surface of the magnetic steel in the first V-shaped groove 13 on the right side of the first rectangular groove 11; The polarity of the outer side surface of the magnetic steel in the second rectangular groove 15 is the same as the polarity of the outer side surface of the magnetic steel in the second V-shaped groove 14 on the left side of the second rectangular groove 15, and the polarity of the outer side surface of the magnetic steel in the second rectangular groove 15 is the same as the polarity of the outer side surface of the magnetic steel in the second oblique straight groove 16 on 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 .

[0017] 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 .

[0018] There is a 1.5mm non-connected distance between the inner end of the first oblique straight groove 7 and the outer end of the magnetic isolation groove 8, there is a 1.5mm non-connected distance 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 1.5mm non-connected distance between the right end of the second rectangular groove 15 and the inner end of the second oblique straight groove 16; 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 proximal ends of the first rectangular groove 11 and the first V-shaped groove 13; A voltage-stabilized power generation system includes a generator and a voltage-stabilized controller, wherein the generator is a low-magnetic steel end-magnetic leakage generator.

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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