Built-in radial and tangential combined magnetic pole permanent magnet generator for automobile

Abstract

The invention discloses a built-in radial and tangential combined type magnetic pole permanent magnet generator for an automobile, and relates to the technical field of automobile motor electric appliances, the built-in radial and tangential combined type magnetic pole permanent magnet generator comprises a built-in radial and tangential combined type magnetic pole permanent magnet rotor, a shaft and a rotor iron core, and the rotor iron core comprises a plurality of rotor punching sheets. A first N magnetic pole center line, a first S magnetic pole center line, a second N magnetic pole center line and a second S magnetic pole center line are distributed on each rotor punching sheet, two adjacent magnetic poles are asymmetrical, the first N magnetic pole and the second N magnetic pole are asymmetrical, and the first S magnetic pole and the second S magnetic pole are asymmetrical. The generator rotor is a built-in radial and tangential combined type magnetic pole permanent magnet rotor, the magnetic field of each magnetic pole is jointly provided by multiple layers and multiple pieces of permanent magnet steel, a magnetic isolation air gap optimizes a magnetic circuit, and the generator rotor has the advantages of being large in magnetic field intensity, high in power density, remarkable in magnetic gathering effect, compact in structure, stable in output voltage, high in demagnetization resistance risk, high in reliability and the like.

Description

Technical Field

[0001] The invention relates to the technical field of automobile motors and electrical appliances, and in particular to a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles. Background Art

[0002] At present, most of the generators used in automobiles are electrically excited generators, which generally have the problems of high loss, low efficiency, small output power and unstable output voltage, and cannot meet the increasingly diverse usage requirements. Permanent magnet generators have the advantages of large starting torque, high efficiency and low maintenance cost because permanent magnets themselves have high magnetic field strength and stability. The development of permanent magnet generators is a current hot issue.

[0003] At present, most permanent magnet generators are symmetrical structures, and the symmetrical structures only use a single radial magnetic steel or tangential magnetic steel as the only magnetic potential source. For example, in the prior art, the published Chinese patent: Tangential permanent magnet motor rotor assembly, tangential permanent magnet synchronous motor, air conditioner, publication number: CN118432334A, discloses a method for reducing the leakage flux of the traditional tangential permanent magnet synchronous motor, by setting an auxiliary permanent magnet at the inner end between the tangential permanent magnets close to the rotating shaft to achieve the purpose of reducing the leakage flux of the tangential permanent magnet and making full use of the effective magnetic field. The published Chinese patent: An embedded permanent magnet synchronous motor rotor structure, publication number: CN117458748A, discloses an embedded permanent magnet synchronous motor rotor structure. On the basis of the built-in radial structure, the structure of the permanent magnet in the motor rotor is changed to a wave-shaped permanent magnet shape, and the combination of upper and lower peaks and valleys is used to expand the effective magnetic volume. The rotor magnetic field strength can be increased under a certain amount of permanent magnets. The symmetrical structure motor has a large tooth torque, which is not conducive to the smooth operation of the motor. For the generator, the output voltage is unstable and the motor efficiency is reduced. The auxiliary permanent magnet is set in the middle of the tangential magnet steel of the traditional tangential permanent magnet synchronous motor near the rotating shaft, which has poor magnetic concentration effect and low output power. The wavy permanent magnet in the radial wavy permanent magnet synchronous motor is difficult to process, which increases the production cost. In addition, the radial magnetic steel has poor magnetic concentration effect, the air gap magnetic density will be concave at the top, and the induced electromotive force waveform will also be concave at the top, affecting the quality of the output voltage.

[0004] In order to solve the above problems, it is necessary to provide a new type of permanent magnet generator. Summary of the invention

[0005] The purpose of the present invention is to provide a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles. The generator rotor is a built-in radial and tangential combined magnetic pole permanent magnet rotor. The magnetic field of each pole of the generator rotor is provided by multiple layers and multiple pieces of permanent magnet steel. The magnetic isolation air gap optimizes the magnetic circuit and has the characteristics of high magnetic field intensity, high power density, significant magnetic concentration effect, compact structure, stable output voltage, high resistance to demagnetization risk, and high reliability.

[0006] To achieve the above-mentioned purpose, the present invention provides a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles, comprising a generator rotor, wherein the generator rotor is a built-in radial and tangential combined magnetic pole permanent magnet rotor, the built-in radial and tangential combined magnetic pole permanent magnet rotor comprises a shaft and a rotor core fixed on the shaft, the rotor core comprises a plurality of rotor punchings with the same stacking direction, two adjacent rotor punchings are welded, a first N magnetic pole center line, a first S magnetic pole center line, a second N magnetic pole center line and a second S magnetic pole center line are uniformly distributed in a clockwise direction on each rotor punching, the magnetic poles at both ends of the first N magnetic pole center line are both first N magnetic poles, the magnetic poles at both ends of the first S magnetic pole center line are both first S magnetic poles, the magnetic poles at both ends of the second N magnetic pole center line are both second N magnetic poles, the magnetic poles at both ends of the second S magnetic pole center line are both second S magnetic poles, and the adjacent two magnetic poles are asymmetric, the first N magnetic pole is asymmetric with the second N magnetic pole, and the first S magnetic pole is asymmetric with the second S magnetic pole.

[0007] Preferably, the first N magnetic pole is provided with a first rectangular permanent magnet steel, a first magnetic isolation air gap, a second magnetic isolation air gap, a first semicircular arc permanent magnet steel, a second rectangular permanent magnet steel, a third magnetic isolation air gap, a fourth magnetic isolation air gap, a third rectangular permanent magnet steel, a fifth magnetic isolation air gap, a fourth rectangular permanent magnet steel and a sixth magnetic isolation air gap; The first rectangular permanent magnet steel has two pieces and is respectively located in the two first rectangular through holes, the polarities of the opposite sides of the two pieces of the first rectangular permanent magnet steel are both N poles, the two first rectangular through holes are symmetrically arranged on both sides of the center line of the first N magnetic pole to form a first figure eight-shaped hole with a small opening close to the axis and a large opening far away from the axis, the far-axial ends of the two first rectangular through holes are not connected to the outer circle of the rotor punching sheet, the proximal ends of the two first rectangular through holes are respectively connected to the first magnetic isolation air gap and the second magnetic isolation air gap that penetrate the thickness of the rotor punching sheet, the widths of the first magnetic isolation air gap and the second magnetic isolation air gap are both smaller than the width of the first rectangular through hole, the first magnetic isolation air gap and the second magnetic isolation air gap both include a front section and a rear section, the front section and the first rectangular through hole connected thereto are located on the same straight line, the rear section is perpendicular to the center line of the first N magnetic pole, and the first magnetic isolation air gap is not connected to the second magnetic isolation air gap; The inner arc surface of the first semicircular arc permanent magnet steel is an N pole and is located in the first semicircular arc through hole, the first semicircular arc through hole is located on the side of the two first rectangular through holes away from the axis, the inner arc surface of the first semicircular arc through hole faces the outer circle of the rotor punching, and the symmetry line of the first semicircular arc through hole coincides with the center line of the first N magnetic pole, and the first semicircular arc through hole is not connected to the outer circle of the rotor punching, the two first rectangular through holes, the first magnetic isolation air gap, and the second magnetic isolation air gap; The second rectangular permanent magnet steel is located in the second rectangular through hole, and the upper end surface of the second rectangular permanent magnet steel is an N pole. The second rectangular through hole is located at one end of the first figure eight hole close to the shaft, and the second rectangular through hole is vertically symmetrical about the center line of the first N magnetic pole. The second rectangular through hole is not connected to the shaft and the first figure eight hole. The two ends of the second rectangular through hole are respectively connected to the third magnetic isolation air gap and the fourth magnetic isolation air gap that penetrate the thickness of the rotor punching sheet. The widths of the third magnetic isolation air gap and the fourth magnetic isolation air gap are both smaller than the width of the second rectangular through hole, and the third magnetic isolation air gap, the fourth magnetic isolation air gap and the second rectangular through hole are located on the same straight line; The third rectangular permanent magnet steel is located in the third rectangular through hole, and the fourth rectangular permanent magnet steel is located in the fourth rectangular through hole. The polarities of the opposite sides of the third rectangular permanent magnet steel and the fourth rectangular permanent magnet steel are both N poles. The third rectangular through hole and the fourth rectangular through hole are symmetrically arranged on both sides of the first figure eight hole. The third rectangular through hole and the fourth rectangular through hole are neither parallel to nor connected with the two first rectangular through holes. The distal axial end of the third rectangular through hole and the distal axial end of the fourth rectangular through hole are not connected with the outer circle of the rotor punching sheet. The proximal axial end of the third rectangular through hole and the proximal axial end of the fourth rectangular through hole are respectively connected to the fifth magnetic isolation air gap that runs through the thickness of the rotor punching sheet. The fifth magnetic isolation air gap is located on the extension line of the third rectangular through hole, and the width of the fifth magnetic isolation air gap is smaller than the width of the third rectangular through hole. The sixth magnetic isolation air gap is located on the extension line of the fourth rectangular through hole, and the width of the sixth magnetic isolation air gap is smaller than the width of the fourth rectangular through hole. The fifth magnetic isolation air gap and the third magnetic isolation air gap are located on the same side of the center line of the first N magnetic pole, and the fifth magnetic isolation air gap is not connected to the third magnetic isolation air gap. The sixth magnetic isolation air gap and the fourth magnetic isolation air gap are located on the same side of the center line of the first N magnetic pole, and the sixth magnetic isolation air gap is not connected to the fourth magnetic isolation air gap.

[0008] Preferably, the first S magnetic pole is provided with a fifth rectangular permanent magnet steel, a sixth rectangular permanent magnet steel, a seventh magnetic isolation air gap, an eighth magnetic isolation air gap, a ninth magnetic isolation air gap and a tenth magnetic isolation air gap, the fifth rectangular permanent magnet steel has two pieces and is respectively located in two fifth rectangular through holes, the polarities of the opposite sides of the two pieces of the fifth rectangular permanent magnet steel are both S poles, the two fifth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a second eight-shaped hole with a small opening close to the axis and a large opening away from the axis, the second eight-shaped hole is not connected to the fourth rectangular through hole, the distal ends of the two fifth rectangular through holes are not connected to the outer circle of the rotor punching, the proximal ends of the two fifth rectangular through holes are respectively connected to the seventh magnetic isolation air gap and the eighth magnetic isolation air gap that penetrate the thickness of the rotor punching, the widths of the seventh magnetic isolation air gap and the eighth magnetic isolation air gap are both smaller than the width of the fifth rectangular through hole, the seventh magnetic isolation air gap and the eighth magnetic isolation air gap are not connected, and the seventh magnetic isolation air gap and the eighth magnetic isolation air gap are respectively located on the extension lines of the fifth rectangular through hole connected thereto; There are two pieces of the sixth rectangular permanent magnet steel and they are respectively located in the two sixth rectangular through holes. The polarities of the opposite sides of the two pieces of the fifth rectangular permanent magnet steel are both S poles. The two sixth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a third figure-eight hole with a small opening close to the axis and a large opening far away from the axis. The two sixth rectangular through holes are located between the two fifth rectangular through holes. The far axial ends of the two sixth rectangular through holes are not connected to the outer circle of the rotor punching sheet. The proximal ends of the two sixth rectangular through holes are respectively connected to the ninth magnetic isolation air gap and the tenth magnetic isolation air gap that penetrate the thickness of the rotor punching sheet. The widths of the ninth magnetic isolation air gap and the tenth magnetic isolation air gap are both smaller than the width of the sixth rectangular through hole. The ninth magnetic isolation air gap and the tenth magnetic isolation air gap are not connected, and the ninth magnetic isolation air gap and the tenth magnetic isolation air gap are respectively located on the extension lines of the sixth rectangular through hole connected to them.

[0009] Preferably, the second N magnetic pole is provided with a seventh rectangular permanent magnet steel, an eighth rectangular permanent magnet steel, a ninth rectangular permanent magnet steel, an eleventh magnetic isolation air gap, a twelfth magnetic isolation air gap, a thirteenth magnetic isolation air gap and a fourteenth magnetic isolation air gap, the seventh rectangular permanent magnet steel has two pieces and is respectively located in two seventh rectangular through holes, the polarities of the opposite sides of the two pieces of the seventh rectangular permanent magnet steel are both N poles, the two seventh rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole to form a fourth figure eight hole with a small opening close to the axis and a large opening away from the axis, the far axial ends of the two seventh rectangular through holes are not connected to the outer circle of the rotor punching, the proximal axial ends of the two seventh rectangular through holes are respectively connected to an eleventh magnetic isolation air gap that runs through the thickness of the rotor punching, the two eleventh magnetic isolation air gaps are respectively located on the extension lines of the seventh rectangular through holes connected thereto, and the two eleventh magnetic isolation air gaps are not connected; The eighth rectangular permanent magnet is located in the eighth rectangular through hole and its upper end surface is an N pole. The eighth rectangular through hole is located on the side of the fourth figure eight hole away from the shaft. The distal end of the eighth rectangular through hole is connected to the outer circle of the rotor punching sheet. The proximal end of the eighth rectangular through hole is provided with a circular through hole that is not connected thereto. An iron rivet is adapted to be connected in the circular through hole. A pole shoe is also provided in the eighth rectangular through hole. A bolt is provided on the pole shoe. The bolt passes through the eighth rectangular permanent magnet and is connected to the iron rivet. The ninth rectangular permanent magnet steel has two pieces and is respectively located in two ninth rectangular through holes, the upper end surfaces of the two pieces of the ninth rectangular permanent magnet steel are both N poles, the two ninth rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole and are both perpendicular to the center line of the second N magnetic pole, the ends of the two ninth rectangular through holes close to the center line of the second N magnetic pole are connected to the twelfth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the twelfth magnetic isolation air gap is smaller than the width of the ninth rectangular through hole, the two twelfth magnetic isolation air gaps are not connected to each other and are both perpendicular to the center line of the second N magnetic pole, and the ends of the two ninth rectangular through holes away from the center line of the second N magnetic pole are respectively connected to the thirteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet. The air gap is connected to the fourteenth magnetic isolation air gap, the width of the thirteenth magnetic isolation air gap and the width of the fourteenth magnetic isolation air gap are both smaller than the width of the ninth rectangular through hole, the thirteenth magnetic isolation air gap and the fourteenth magnetic isolation air gap are symmetrically arranged on both sides of the center line of the second N magnetic pole, and the thirteenth magnetic isolation air gap and the adjacent fifth rectangular permanent magnet are located on the same side of the center line of the second N magnetic pole, the thirteenth magnetic isolation air gap and the fourteenth magnetic isolation air gap both include a straight section and a bent section, the straight section is located on the extension line of the ninth rectangular through hole, and the bent section extends toward the outer circle of the rotor punching, and the thirteenth magnetic isolation air gap is not connected to the outer circle of the rotor punching, the fifth rectangular through hole, and the seventh rectangular through hole.

[0010] Preferably, the second S magnetic pole is provided with a tenth rectangular permanent magnet steel, a fifteenth magnetic isolation air gap, a second semicircular arc permanent magnet steel, an eleventh rectangular permanent magnet steel and a sixteenth magnetic isolation air gap, the tenth rectangular permanent magnet steel is located in the tenth rectangular through hole, the eleventh rectangular permanent magnet steel is located in the eleventh rectangular through hole, the tenth rectangular through hole and the eleventh rectangular through hole are respectively located on both sides of the center line of the second S magnetic pole in an asymmetric form, and the polarities of the opposite sides of the tenth rectangular permanent magnet steel and the eleventh rectangular permanent magnet steel are both S poles; The tenth rectangular through hole and the adjacent fourteenth magnetic isolation air gap are located on the same side of the center line of the second S magnetic pole and are not connected to each other, the distal end of the tenth rectangular through hole is not connected to the outer circle of the rotor punching sheet, the proximal end of the tenth rectangular through hole is connected to the fifteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the fifteenth magnetic isolation air gap is smaller than the width of the tenth rectangular through hole, and the fifteenth magnetic isolation air gap extends toward the center line of the second S magnetic pole and is located on the extension line of the tenth rectangular through hole; The eleventh rectangular through hole and the adjacent third rectangular through hole are located on the same side of the center line of the second S magnetic pole and are not connected to each other, the distal end of the eleventh rectangular through hole is not connected to the outer circle of the rotor punching sheet, the proximal end of the eleventh rectangular through hole is connected to the sixteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the sixteenth magnetic isolation air gap is smaller than the width of the eleventh rectangular through hole, the sixteenth magnetic isolation air gap includes an extension section and a vertical section, the extension section is connected to the eleventh rectangular through hole and is located on the extension line of the eleventh rectangular through hole, and the vertical section is perpendicular to the center line of the second S magnetic pole; The inner arc surface of the second semicircular arc permanent magnet steel is an S pole and is located in the second semicircular arc through hole, the second semicircular arc through hole is located on the side of the fifteenth magnetic isolation air gap and the sixteenth magnetic isolation air gap away from the axis, the inner arc surface of the second semicircular arc through hole faces the outer circle of the rotor punching, and the symmetry line of the second semicircular arc through hole coincides with the center line of the second S magnetic pole, and the second semicircular arc through hole is not connected to the outer circle of the rotor punching, the tenth rectangular through hole, the eleventh rectangular through hole, the fifteenth magnetic isolation air gap and the sixteenth magnetic isolation air gap.

[0011] Therefore, the internal radial and tangential combined magnetic pole permanent magnet generator for automobiles of the present invention adopting the above structure has the following beneficial effects: 1. The generator rotor adopts a combined structure of radial magnetic pole structure and tangential magnetic pole structure, which can solve the problems of concave air gap magnetic density peak of radial magnetic pole structure and large magnetic leakage of tangential structure. The combined magnetic pole structure increases the magnetic concentration capacity and reduces the magnetic leakage loss. On the basis of ensuring mechanical strength, the magnetic pole capacity can be fully utilized. The structure is compact, the rotor magnetic field strength under the unit volume of permanent magnet is improved, and the power density is high.

[0012] 2. The generator rotor adopts a structure in which the N pole and the S pole are arranged at intervals, the adjacent N poles are asymmetric with the S poles, the first N magnetic pole is asymmetric with the second N magnetic pole, and the first S magnetic pole is asymmetric with the second S magnetic pole, so that the corresponding air gap magnetic induction intensity and its change rate are different, which can fully weaken the harmonic content in the air gap magnetic flux density, improve the sinusoidality of the air gap magnetic flux density waveform, reduce the cogging torque, and then weaken the harmonic content in the induced electromotive force waveform, improve the sinusoidality of the induced electromotive force waveform, and improve the stability of the output voltage.

[0013] 3. The magnetic poles are arranged in a multi-layer combination, which can improve the generator's ability to resist demagnetization risks, reduce the generator's failure rate, increase the motor's service life, and have high reliability.

[0014] 4. Setting a magnetic isolation air gap can optimize the magnetic circuit, reduce magnetic leakage, increase magnetic concentration capacity, improve the sinusoidal nature of the air gap magnetic density, and help improve the operating efficiency of the generator.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles of the present invention; Figure 2 It is a structural schematic diagram of an embodiment of a generator rotor in a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles of the present invention; Figure 3 The air gap waveform diagram of the built-in radial and tangential combined magnetic pole generator of the present invention; Figure 4 It is a diagram of the air gap magnetic flux harmonic amplitude of the built-in radial and tangential combined magnetic pole generator of the present invention; Figure 5 This is the waveform diagram of the induced electromotive force of the built-in radial and tangential combined magnetic pole generator of the present invention; Figure 6 This is a diagram of the harmonic amplitude of the induced electromotive force of the built-in radial and tangential combined magnetic pole generator of the present invention.

[0017] Reference numerals 1. Front cover; 2. Rear cover; 3. Electronic voltage regulator; 4. Shaft; 5. Rotor core; 6. Rotor punching; 7. First rectangular permanent magnet steel; 8. First magnetic isolation air gap; 9. Second magnetic isolation air gap; 10. First semicircular arc permanent magnet steel; 11. Second rectangular permanent magnet steel; 12. Third magnetic isolation air gap; 13. Fourth magnetic isolation air gap; 14. Third rectangular permanent magnet steel; 15. Fifth magnetic isolation air gap; 16. Fourth rectangular permanent magnet steel; 17. Sixth magnetic isolation air gap; 18. Fifth rectangular permanent magnet steel; 19. Sixth rectangular permanent magnet steel; 20. Seventh magnetic isolation air gap; 21. The eighth magnetic isolation air gap; 22. The ninth magnetic isolation air gap; 23. The tenth magnetic isolation air gap; 24. The seventh rectangular permanent magnet steel; 25. The eighth rectangular permanent magnet steel; 26. The ninth rectangular permanent magnet steel; 27. The eleventh magnetic isolation air gap; 28. The twelfth magnetic isolation air gap; 29. ​​The thirteenth magnetic isolation air gap; 30. The fourteenth magnetic isolation air gap; 31. The rivet; 32. The bolt; 33. The pole shoe; 34. The tenth rectangular permanent magnet steel; 35. The fifteenth magnetic isolation air gap; 36. The second semicircular arc permanent magnet steel; 37. The eleventh rectangular permanent magnet steel; 38. The sixteenth magnetic isolation air gap. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0019] Example like Figure 1-2 As shown, a built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles includes a front cover 1, a rear cover 2, a generator rotor, a stator and an electronic voltage regulator 3, and the electronic voltage regulator 3 is fixed to the rear cover 2 by bolts 32. The generator rotor is a built-in radial and tangential combined magnetic pole permanent magnet rotor, and the built-in radial and tangential combined magnetic pole permanent magnet rotor includes a shaft 4 and a rotor core 5 fixed on the shaft 4, and the rotor core 5 includes a plurality of rotor punchings 6 with the same stacking direction. Two adjacent rotor punchings 6 are welded, and each rotor punching 6 is uniformly distributed with a first N magnetic pole center line, a first S magnetic pole center line, a second N magnetic pole center line and a second S magnetic pole center line in a clockwise direction. The magnetic poles at both ends of the first N magnetic pole center line are all first N magnetic poles, the magnetic poles at both ends of the first S magnetic pole center line are all first S magnetic poles, the magnetic poles at both ends of the second N magnetic pole center line are all second N magnetic poles, and the magnetic poles at both ends of the second S magnetic pole center line are all second S magnetic poles. Two adjacent magnetic poles are asymmetric, the first N magnetic pole is asymmetric to the second N magnetic pole, and the first S magnetic pole is asymmetric to the second S magnetic pole.

[0020] The first N magnetic pole is provided with a first rectangular permanent magnet steel 7, a first magnetic isolation air gap 8, a second magnetic isolation air gap 9, a first semicircular arc permanent magnet steel 10, a second rectangular permanent magnet steel 11, a third magnetic isolation air gap 12, a fourth magnetic isolation air gap 13, a third rectangular permanent magnet steel 14, a fifth magnetic isolation air gap 15, a fourth rectangular permanent magnet steel 16 and a sixth magnetic isolation air gap 17.

[0021] There are two pieces of first rectangular permanent magnet steel 7, which are respectively located in two first rectangular through holes. The polarities of the opposite sides of the two pieces of first rectangular permanent magnet steel 7 are both N poles. The two first rectangular through holes are symmetrically arranged on both sides of the center line of the first N magnetic pole to form a first figure eight hole with a small opening close to the axis 4 and a large opening away from the axis 4. The ends of the two first rectangular through holes away from the axis 4 are not connected to the outer circle of the rotor punching 6, and the proximal ends of the two first rectangular through holes are respectively connected to the first magnetic isolation gap 8 and the second magnetic isolation gap 9 that penetrate the thickness of the rotor punching 6. In the present invention, the end away from the axis 4 is referred to as the distal end, and the end close to the axis 4 is referred to as the proximal end. The widths of the first magnetic isolation gap 8 and the second magnetic isolation gap 9 are both smaller than the width of the first rectangular through hole, and the first magnetic isolation gap 8 is not connected to the second magnetic isolation gap 9. The first magnetic isolation gap 8 and the second magnetic isolation gap 9 both include a front section and a rear section, the front section and the first rectangular through hole connected thereto are located on the same straight line, and the rear section is perpendicular to the center line of the first N magnetic pole. The first magnetic isolation air gap 8 and the second magnetic isolation air gap 9 are bent, which can ensure that the second rectangular permanent magnet 11 has sufficient magnetic circuit space, so that the second rectangular permanent magnet 11 can fully exert its magnetic capacity.

[0022] The inner arc surface of the first semicircular arc permanent magnet steel 10 is an N pole and is located in the first semicircular arc through hole, and the first semicircular arc through hole is located on the side of the two first rectangular through holes away from the shaft 4. The inner arc surface of the first semicircular arc through hole faces the outer circle of the rotor punching 6, and the symmetry line of the first semicircular arc through hole coincides with the center line of the first N magnetic pole. The first semicircular arc through hole is not connected to the outer circle of the rotor punching 6, the two first rectangular through holes, the first magnetic isolation air gap 8, and the second magnetic isolation air gap 9.

[0023] The second rectangular permanent magnet steel 11 is located in the second rectangular through hole, and the upper end surface of the second rectangular permanent magnet steel 11 is an N pole. The second rectangular through hole is located at one end of the first figure eight hole close to the shaft 4, and the second rectangular through hole is vertically symmetrical about the center line of the first N magnetic pole. The second rectangular through hole is not connected to the shaft 4 and the first figure eight hole, and the two ends of the second rectangular through hole are respectively connected to the third magnetic isolation air gap 12 and the fourth magnetic isolation air gap 13 that penetrate the thickness of the rotor punching 6. The widths of the third magnetic isolation air gap 12 and the fourth magnetic isolation air gap 13 are both smaller than the width of the second rectangular through hole, and the third magnetic isolation air gap 12, the fourth magnetic isolation air gap 13 and the second rectangular through hole are located on the same straight line.

[0024] The third rectangular permanent magnet steel 14 is located in the third rectangular through hole, and the fourth rectangular permanent magnet steel 16 is located in the fourth rectangular through hole. The polarities of the opposite sides of the third rectangular permanent magnet steel 14 and the fourth rectangular permanent magnet steel 16 are both N poles. The third rectangular through hole and the fourth rectangular through hole are symmetrically arranged on both sides of the first figure eight hole. The third rectangular through hole and the fourth rectangular through hole are not parallel to or connected with the two first rectangular through holes. The distal axial end of the third rectangular through hole and the distal axial end of the fourth rectangular through hole are not connected with the outer circle of the rotor punching 6, and the proximal axial end of the third rectangular through hole and the proximal axial end of the fourth rectangular through hole are respectively connected with the fifth magnetic isolation air gap 15 and the sixth magnetic isolation air gap 17 that penetrate the thickness of the rotor punching 6. The fifth magnetic isolation air gap 15 is located on the extension line of the third rectangular through hole, and the width of the fifth magnetic isolation air gap 15 is smaller than the width of the third rectangular through hole. The sixth magnetic isolation air gap 17 is located on the extension line of the fourth rectangular through hole, and the width of the sixth magnetic isolation air gap 17 is smaller than the width of the fourth rectangular through hole. The fifth magnetic isolation gap 15 and the third magnetic isolation gap 12 are located on the same side of the center line of the first N magnetic pole, and the fifth magnetic isolation gap 15 is not connected to the third magnetic isolation gap 12. The sixth magnetic isolation gap 17 and the fourth magnetic isolation gap 13 are located on the same side of the center line of the first N magnetic pole, and the sixth magnetic isolation gap 17 is not connected to the fourth magnetic isolation gap 13.

[0025] The first S magnetic pole is provided with a fifth rectangular permanent magnet steel 18 , a sixth rectangular permanent magnet steel 19 , a seventh magnetic isolation air gap 20 , an eighth magnetic isolation air gap 21 , a ninth magnetic isolation air gap 22 and a tenth magnetic isolation air gap 23 .

[0026] There are two pieces of the fifth rectangular permanent magnet steel 18 and they are respectively located in the two fifth rectangular through holes. The polarities of the opposite sides of the two pieces of the fifth rectangular permanent magnet steel 18 are both S poles. The two fifth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a second eight-shaped hole with a small opening close to the axis 4 and a large opening away from the axis 4. The second eight-shaped hole is not connected to the fourth rectangular through hole. The far-axial ends of the two fifth rectangular through holes are not connected to the outer circle of the rotor punching 6, and the proximal ends of the two fifth rectangular through holes are respectively connected to the seventh magnetic isolation air gap 20 and the eighth magnetic isolation air gap 21 that penetrate the thickness of the rotor punching 6. The widths of the seventh magnetic isolation air gap 20 and the eighth magnetic isolation air gap 21 are both smaller than the width of the fifth rectangular through hole. The seventh magnetic isolation air gap 20 and the eighth magnetic isolation air gap 21 are not connected, and the seventh magnetic isolation air gap 20 and the eighth magnetic isolation air gap 21 are respectively located on the extension lines of the fifth rectangular through hole connected thereto.

[0027] There are two sixth rectangular permanent magnet steels 19 and they are respectively located in two sixth rectangular through holes, and the polarities of the opposite sides of the two fifth rectangular permanent magnet steels 18 are both S poles. The two sixth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a third eight-shaped hole with a small opening close to the axis 4 and a large opening away from the axis 4, and the two sixth rectangular through holes are located between the two fifth rectangular through holes. The far-axial ends of the two sixth rectangular through holes are not connected to the outer circle of the rotor punching 6, and the near-axial ends of the two sixth rectangular through holes are respectively connected to the ninth magnetic isolation gap 22 and the tenth magnetic isolation gap 23 that penetrate the thickness of the rotor punching 6. The widths of the ninth magnetic isolation gap 22 and the tenth magnetic isolation gap 23 are both smaller than the width of the sixth rectangular through hole, the ninth magnetic isolation gap 22 and the tenth magnetic isolation gap 23 are not connected, and the ninth magnetic isolation gap 22 and the tenth magnetic isolation gap 23 are respectively located on the extension lines of the sixth rectangular through holes connected thereto.

[0028] The second N magnetic pole is provided with a seventh rectangular permanent magnet steel 24 , an eighth rectangular permanent magnet steel 25 , a ninth rectangular permanent magnet steel 26 , an eleventh magnetic isolation air gap 27 , a twelfth magnetic isolation air gap 28 , a thirteenth magnetic isolation air gap 29 and a fourteenth magnetic isolation air gap 30 .

[0029] There are two seventh rectangular permanent magnet steels 24 and they are respectively located in two seventh rectangular through holes. The polarities of the opposite sides of the two seventh rectangular permanent magnet steels 24 are both N poles. The two seventh rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole to form a fourth figure-eight hole with a small opening close to the shaft 4 and a large opening away from the shaft 4. The far-axial ends of the two seventh rectangular through holes are not connected to the outer circle of the rotor punching 6, and the near-axial ends of the two seventh rectangular through holes are respectively connected to an eleventh magnetic isolation air gap 27 that runs through the thickness of the rotor punching 6. The two eleventh magnetic isolation air gaps 27 are respectively located on the extension lines of the seventh rectangular through holes connected thereto, and the two eleventh magnetic isolation air gaps 27 are not connected.

[0030] The eighth rectangular permanent magnet steel 25 is located in the eighth rectangular through hole and its upper end face is the N pole. The upper end face in the present application is the side close to the front end cover 1. The eighth rectangular through hole is located on the side of the fourth figure eight hole away from the shaft 4, and the far axial end of the eighth rectangular through hole is connected to the outer circle of the rotor punching 6. The proximal axial end of the eighth rectangular through hole is provided with a circular through hole that is not connected to it, and an iron rivet 31 is adapted to be connected in the circular through hole. A pole shoe 33 is also provided in the eighth rectangular through hole, and a bolt 32 is provided on the pole shoe 33, and the bolt 32 passes through the eighth rectangular permanent magnet steel 25 and is connected to the iron rivet 31.

[0031] There are two pieces of the ninth rectangular permanent magnet steel 26, which are respectively located in the two ninth rectangular through holes. The upper end surfaces of the two pieces of the ninth rectangular permanent magnet steel 26 are both N poles. The two ninth rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole and are both perpendicular to the center line of the second N magnetic pole. The ends of the two ninth rectangular through holes close to the center line of the second N magnetic pole are both connected to a twelfth magnetic isolation air gap 28 that runs through the thickness of the rotor punching 6. The width of the twelfth magnetic isolation air gap 28 is smaller than the width of the ninth rectangular through hole. The two twelfth magnetic isolation air gaps 28 are not connected to each other and are both perpendicular to the center line of the second N magnetic pole. The ends of the two ninth rectangular through holes away from the center line of the second N magnetic pole are respectively connected to the thirteenth magnetic isolation air gap 29 and the fourteenth magnetic isolation air gap 30 that run through the thickness of the rotor punching 6. The width of the thirteenth magnetic isolation air gap 29 and the width of the fourteenth magnetic isolation air gap 30 are both smaller than the width of the ninth rectangular through hole. The thirteenth magnetic isolation air gap 29 and the fourteenth magnetic isolation air gap 30 are symmetrically arranged on both sides of the center line of the second N magnetic pole, and the thirteenth magnetic isolation air gap 29 and the adjacent fifth rectangular permanent magnet 18 are located on the same side of the center line of the second N magnetic pole. The thirteenth magnetic isolation air gap 29 and the fourteenth magnetic isolation air gap 30 both include a straight section and a bent section, the straight section is located on the extension line of the ninth rectangular through hole, and the bent section extends toward the outer circle of the rotor punching 6. The thirteenth magnetic isolation air gap 29 is not connected to the outer circle of the rotor punching 6, the fifth rectangular through hole, and the seventh rectangular through hole.

[0032] The second S magnetic pole is provided with a tenth rectangular permanent magnet steel 34, a fifteenth magnetic isolation air gap 35, a second semicircular arc permanent magnet steel 36, an eleventh rectangular permanent magnet steel 37 and a sixteenth magnetic isolation air gap 38. The tenth rectangular permanent magnet steel 34 is located in the tenth rectangular through hole, the eleventh rectangular permanent magnet steel 37 is located in the eleventh rectangular through hole, the tenth rectangular through hole and the eleventh rectangular through hole are respectively located on both sides of the center line of the second S magnetic pole in an asymmetric manner, and the polarities of the opposite sides of the tenth rectangular permanent magnet steel 34 and the eleventh rectangular permanent magnet steel 37 are both S poles.

[0033] The tenth rectangular through hole and the adjacent fourteenth magnetic isolation air gap 30 are located on the same side of the center line of the second S magnetic pole and are not connected to each other. The distal end of the tenth rectangular through hole is not connected to the outer circle of the rotor punching 6, and the proximal end of the tenth rectangular through hole is connected to the fifteenth magnetic isolation air gap 35 that runs through the thickness of the rotor punching 6. The width of the fifteenth magnetic isolation air gap 35 is smaller than the width of the tenth rectangular through hole. The fifteenth magnetic isolation air gap 35 extends toward the center line of the second S magnetic pole and is located on the extension line of the tenth rectangular through hole.

[0034] The eleventh rectangular through hole and the adjacent third rectangular through hole are located on the same side of the center line of the second S magnetic pole and are not connected to each other. The distal end of the eleventh rectangular through hole is not connected to the outer circle of the rotor punching 6, and the proximal end of the eleventh rectangular through hole is connected to the sixteenth magnetic isolation air gap 38 that runs through the thickness of the rotor punching 6. The width of the sixteenth magnetic isolation air gap 38 is smaller than the width of the eleventh rectangular through hole, and the sixteenth magnetic isolation air gap 38 includes an extension section and a vertical section. The extension section is connected to the eleventh rectangular through hole and is located on the extension line of the eleventh rectangular through hole, and the vertical section is perpendicular to the center line of the second S magnetic pole.

[0035] The inner arc surface of the second semicircular arc permanent magnet steel 36 is an S pole and is located in the second semicircular arc through hole, and the second semicircular arc through hole is located on the side of the fifteenth magnetic isolation gap 35 and the sixteenth magnetic isolation gap 38 away from the shaft 4. The inner arc surface of the second semicircular arc through hole faces the outer circle of the rotor punching 6, and the symmetry line of the second semicircular arc through hole coincides with the center line of the second S magnetic pole. The second semicircular arc through hole is not connected to the outer circle of the rotor punching 6, the tenth rectangular through hole, the eleventh rectangular through hole, the fifteenth magnetic isolation gap 35, and the sixteenth magnetic isolation gap 38.

[0036] The air gap waveform of the built-in radial and tangential combined magnetic pole generator of the present invention is as follows: Figure 3 The air gap magnetic flux harmonic amplitude diagram of the built-in radial and tangential combined magnetic pole generator of the present invention is as follows Figure 4 The waveform of the induced electromotive force of the built-in radial and tangential combined magnetic pole generator of the present invention is as follows: Figure 5 The harmonic amplitude of the induced electromotive force of the built-in radial and tangential combined magnetic pole generator of the present invention is as follows: Figure 6 It can be seen that the generator rotor adopts a combined structure of radial magnetic pole structure and tangential magnetic pole structure to improve the air gap magnetic field strength and solve the problem of air gap magnetic density peak depression. At the same time, the asymmetric structure of the N pole and the S pole weakens the harmonic content in the air gap magnetic density, improves the sinusoidality of the air gap magnetic density waveform, improves the sinusoidality of the induced electromotive force waveform, and improves the stability of the output voltage.

[0037] Therefore, the present invention adopts the above-mentioned structure for the built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles. The magnetic field of each pole of the generator rotor is provided by multiple layers and multiple pieces of permanent magnet steel. The magnetic isolation air gap optimizes the magnetic circuit. It has the characteristics of high magnetic field intensity, high power density, significant magnetic concentration effect, compact structure, stable output voltage, high resistance to demagnetization risk, and high reliability.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A built-in radial and tangential combined magnetic pole permanent magnet generator for automobiles, comprising a generator rotor, characterized in that: The generator rotor is a built-in radial and tangential combined magnetic pole permanent magnet rotor, which includes a shaft and a rotor core fixed on the shaft. The rotor core includes a plurality of rotor punchings with the same stacking direction, and two adjacent rotor punchings are welded. A first N magnetic pole center line, a first S magnetic pole center line, a second N magnetic pole center line, and a second S magnetic pole center line are evenly distributed on each rotor punching in a clockwise direction. The magnetic poles at both ends of the first N magnetic pole center line are both first N magnetic poles, the magnetic poles at both ends of the first S magnetic pole center line are both first S magnetic poles, the magnetic poles at both ends of the second N magnetic pole center line are both second N magnetic poles, the magnetic poles at both ends of the second S magnetic pole center line are both second S magnetic poles, and the adjacent two magnetic poles are asymmetric, the first N magnetic pole is asymmetric with the second N magnetic pole, and the first S magnetic pole is asymmetric with the second S magnetic pole.

2. The internal radial and tangential combined magnetic pole permanent magnet generator for automobile according to claim 1, characterized in that: The first N magnetic pole is provided with a first rectangular permanent magnet steel, a first magnetic isolation air gap, a second magnetic isolation air gap, a first semicircular arc permanent magnet steel, a second rectangular permanent magnet steel, a third magnetic isolation air gap, a fourth magnetic isolation air gap, a third rectangular permanent magnet steel, a fifth magnetic isolation air gap, a fourth rectangular permanent magnet steel and a sixth magnetic isolation air gap; The first rectangular permanent magnet steel has two pieces and is respectively located in the two first rectangular through holes, the polarities of the opposite sides of the two pieces of the first rectangular permanent magnet steel are both N poles, the two first rectangular through holes are symmetrically arranged on both sides of the center line of the first N magnetic pole to form a first figure eight-shaped hole with a small opening close to the axis and a large opening far away from the axis, the far-axial ends of the two first rectangular through holes are not connected to the outer circle of the rotor punching sheet, the proximal ends of the two first rectangular through holes are respectively connected to the first magnetic isolation air gap and the second magnetic isolation air gap that penetrate the thickness of the rotor punching sheet, the widths of the first magnetic isolation air gap and the second magnetic isolation air gap are both smaller than the width of the first rectangular through hole, the first magnetic isolation air gap and the second magnetic isolation air gap both include a front section and a rear section, the front section and the first rectangular through hole connected thereto are located on the same straight line, the rear section is perpendicular to the center line of the first N magnetic pole, and the first magnetic isolation air gap is not connected to the second magnetic isolation air gap; The inner arc surface of the first semicircular arc permanent magnet steel is an N pole and is located in the first semicircular arc through hole, the first semicircular arc through hole is located on the side of the two first rectangular through holes away from the axis, the inner arc surface of the first semicircular arc through hole faces the outer circle of the rotor punching, and the symmetry line of the first semicircular arc through hole coincides with the center line of the first N magnetic pole, and the first semicircular arc through hole is not connected to the outer circle of the rotor punching, the two first rectangular through holes, the first magnetic isolation air gap, and the second magnetic isolation air gap; The second rectangular permanent magnet steel is located in the second rectangular through hole, and the upper end surface of the second rectangular permanent magnet steel is an N pole. The second rectangular through hole is located at one end of the first figure eight hole close to the shaft, and the second rectangular through hole is vertically symmetrical about the center line of the first N magnetic pole. The second rectangular through hole is not connected to the shaft and the first figure eight hole. The two ends of the second rectangular through hole are respectively connected to the third magnetic isolation air gap and the fourth magnetic isolation air gap that penetrate the thickness of the rotor punching sheet. The widths of the third magnetic isolation air gap and the fourth magnetic isolation air gap are both smaller than the width of the second rectangular through hole, and the third magnetic isolation air gap, the fourth magnetic isolation air gap and the second rectangular through hole are located on the same straight line; The third rectangular permanent magnet steel is located in the third rectangular through hole, and the fourth rectangular permanent magnet steel is located in the fourth rectangular through hole. The polarities of the opposite sides of the third rectangular permanent magnet steel and the fourth rectangular permanent magnet steel are both N poles. The third rectangular through hole and the fourth rectangular through hole are symmetrically arranged on both sides of the first figure eight hole. The third rectangular through hole and the fourth rectangular through hole are neither parallel to nor connected with the two first rectangular through holes. The distal axial end of the third rectangular through hole and the distal axial end of the fourth rectangular through hole are not connected with the outer circle of the rotor punching sheet. The proximal axial end of the third rectangular through hole and the proximal axial end of the fourth rectangular through hole are respectively connected to the fifth magnetic isolation air gap that runs through the thickness of the rotor punching sheet. The fifth magnetic isolation air gap is located on the extension line of the third rectangular through hole, and the width of the fifth magnetic isolation air gap is smaller than the width of the third rectangular through hole. The sixth magnetic isolation air gap is located on the extension line of the fourth rectangular through hole, and the width of the sixth magnetic isolation air gap is smaller than the width of the fourth rectangular through hole. The fifth magnetic isolation air gap and the third magnetic isolation air gap are located on the same side of the center line of the first N magnetic pole, and the fifth magnetic isolation air gap is not connected to the third magnetic isolation air gap. The sixth magnetic isolation air gap and the fourth magnetic isolation air gap are located on the same side of the center line of the first N magnetic pole, and the sixth magnetic isolation air gap is not connected to the fourth magnetic isolation air gap.

3. The internal radial and tangential combined magnetic pole permanent magnet generator for automobile according to claim 2, characterized in that: The first S magnetic pole is provided with a fifth rectangular permanent magnet steel, a sixth rectangular permanent magnet steel, a seventh magnetic isolation air gap, an eighth magnetic isolation air gap, a ninth magnetic isolation air gap and a tenth magnetic isolation air gap. The fifth rectangular permanent magnet steel has two pieces and is respectively located in two fifth rectangular through holes. The polarities of the opposite sides of the two pieces of the fifth rectangular permanent magnet steel are both S poles. The two fifth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a second eight-shaped hole with a small opening close to the axis and a large opening far away from the axis. The second eight-shaped hole is not connected to the fourth rectangular through hole. The distal ends of the two fifth rectangular through holes are not connected to the outer circle of the rotor punching sheet. The proximal ends of the two fifth rectangular through holes are respectively connected to the seventh magnetic isolation air gap and the eighth magnetic isolation air gap that penetrate the thickness of the rotor punching sheet. The widths of the seventh magnetic isolation air gap and the eighth magnetic isolation air gap are both smaller than the width of the fifth rectangular through hole. The seventh magnetic isolation air gap and the eighth magnetic isolation air gap are not connected, and the seventh magnetic isolation air gap and the eighth magnetic isolation air gap are respectively located on the extension lines of the fifth rectangular through hole connected thereto. There are two pieces of the sixth rectangular permanent magnet steel and they are respectively located in the two sixth rectangular through holes. The polarities of the opposite sides of the two pieces of the fifth rectangular permanent magnet steel are both S poles. The two sixth rectangular through holes are symmetrically arranged on both sides of the center line of the first S magnetic pole to form a third figure-eight hole with a small opening close to the axis and a large opening far away from the axis. The two sixth rectangular through holes are located between the two fifth rectangular through holes. The far axial ends of the two sixth rectangular through holes are not connected to the outer circle of the rotor punching sheet. The proximal ends of the two sixth rectangular through holes are respectively connected to the ninth magnetic isolation air gap and the tenth magnetic isolation air gap that penetrate the thickness of the rotor punching sheet. The widths of the ninth magnetic isolation air gap and the tenth magnetic isolation air gap are both smaller than the width of the sixth rectangular through hole. The ninth magnetic isolation air gap and the tenth magnetic isolation air gap are not connected, and the ninth magnetic isolation air gap and the tenth magnetic isolation air gap are respectively located on the extension lines of the sixth rectangular through hole connected to them.

4. The internal radial and tangential combined magnetic pole permanent magnet generator for automobile according to claim 3, characterized in that: The second N magnetic pole is provided with a seventh rectangular permanent magnet steel, an eighth rectangular permanent magnet steel, a ninth rectangular permanent magnet steel, an eleventh magnetic isolation air gap, a twelfth magnetic isolation air gap, a thirteenth magnetic isolation air gap and a fourteenth magnetic isolation air gap, the seventh rectangular permanent magnet steel has two pieces and is respectively located in two seventh rectangular through holes, the polarities of the opposite sides of the two pieces of the seventh rectangular permanent magnet steel are both N poles, the two seventh rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole to form a fourth figure eight hole with a small opening close to the axis and a large opening far away from the axis, the far-axial ends of the two seventh rectangular through holes are not connected to the outer circle of the rotor punching, the proximal ends of the two seventh rectangular through holes are respectively connected to an eleventh magnetic isolation air gap that runs through the thickness of the rotor punching, the two eleventh magnetic isolation air gaps are respectively located on the extension lines of the seventh rectangular through holes connected thereto, and the two eleventh magnetic isolation air gaps are not connected; The eighth rectangular permanent magnet is located in the eighth rectangular through hole and its upper end surface is an N pole. The eighth rectangular through hole is located on the side of the fourth figure eight hole away from the shaft. The distal end of the eighth rectangular through hole is connected to the outer circle of the rotor punching sheet. The proximal end of the eighth rectangular through hole is provided with a circular through hole that is not connected thereto. An iron rivet is adapted to be connected in the circular through hole. A pole shoe is also provided in the eighth rectangular through hole. A bolt is provided on the pole shoe. The bolt passes through the eighth rectangular permanent magnet and is connected to the iron rivet. The ninth rectangular permanent magnet steel has two pieces and is respectively located in two ninth rectangular through holes, the upper end surfaces of the two pieces of the ninth rectangular permanent magnet steel are both N poles, the two ninth rectangular through holes are symmetrically arranged on both sides of the center line of the second N magnetic pole and are both perpendicular to the center line of the second N magnetic pole, the ends of the two ninth rectangular through holes close to the center line of the second N magnetic pole are connected to the twelfth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the twelfth magnetic isolation air gap is smaller than the width of the ninth rectangular through hole, the two twelfth magnetic isolation air gaps are not connected to each other and are both perpendicular to the center line of the second N magnetic pole, and the ends of the two ninth rectangular through holes away from the center line of the second N magnetic pole are respectively connected to the thirteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet. The air gap is connected to the fourteenth magnetic isolation air gap, the width of the thirteenth magnetic isolation air gap and the width of the fourteenth magnetic isolation air gap are both smaller than the width of the ninth rectangular through hole, the thirteenth magnetic isolation air gap and the fourteenth magnetic isolation air gap are symmetrically arranged on both sides of the center line of the second N magnetic pole, and the thirteenth magnetic isolation air gap and the adjacent fifth rectangular permanent magnet are located on the same side of the center line of the second N magnetic pole, the thirteenth magnetic isolation air gap and the fourteenth magnetic isolation air gap both include a straight section and a bent section, the straight section is located on the extension line of the ninth rectangular through hole, and the bent section extends toward the outer circle of the rotor punching, and the thirteenth magnetic isolation air gap is not connected to the outer circle of the rotor punching, the fifth rectangular through hole, and the seventh rectangular through hole.

5. The internal radial and tangential combined magnetic pole permanent magnet generator for automobile according to claim 4, characterized in that: The second S magnetic pole is provided with a tenth rectangular permanent magnet steel, a fifteenth magnetic isolation air gap, a second semicircular arc permanent magnet steel, an eleventh rectangular permanent magnet steel and a sixteenth magnetic isolation air gap, the tenth rectangular permanent magnet steel is located in the tenth rectangular through hole, the eleventh rectangular permanent magnet steel is located in the eleventh rectangular through hole, the tenth rectangular through hole and the eleventh rectangular through hole are respectively located on both sides of the center line of the second S magnetic pole in an asymmetric form, and the polarities of the opposite sides of the tenth rectangular permanent magnet steel and the eleventh rectangular permanent magnet steel are both S poles; The tenth rectangular through hole and the adjacent fourteenth magnetic isolation air gap are located on the same side of the center line of the second S magnetic pole and are not connected to each other, the distal end of the tenth rectangular through hole is not connected to the outer circle of the rotor punching sheet, the proximal end of the tenth rectangular through hole is connected to the fifteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the fifteenth magnetic isolation air gap is smaller than the width of the tenth rectangular through hole, and the fifteenth magnetic isolation air gap extends toward the center line of the second S magnetic pole and is located on the extension line of the tenth rectangular through hole; The eleventh rectangular through hole and the adjacent third rectangular through hole are located on the same side of the center line of the second S magnetic pole and are not connected to each other, the distal end of the eleventh rectangular through hole is not connected to the outer circle of the rotor punching sheet, the proximal end of the eleventh rectangular through hole is connected to the sixteenth magnetic isolation air gap that runs through the thickness of the rotor punching sheet, the width of the sixteenth magnetic isolation air gap is smaller than the width of the eleventh rectangular through hole, the sixteenth magnetic isolation air gap includes an extension section and a vertical section, the extension section is connected to the eleventh rectangular through hole and is located on the extension line of the eleventh rectangular through hole, and the vertical section is perpendicular to the center line of the second S magnetic pole; The inner arc surface of the second semicircular arc permanent magnet steel is an S pole and is located in the second semicircular arc through hole, the second semicircular arc through hole is located on the side of the fifteenth magnetic isolation air gap and the sixteenth magnetic isolation air gap away from the axis, the inner arc surface of the second semicircular arc through hole faces the outer circle of the rotor punching, and the symmetry line of the second semicircular arc through hole coincides with the center line of the second S magnetic pole, and the second semicircular arc through hole is not connected to the outer circle of the rotor punching, the tenth rectangular through hole, the eleventh rectangular through hole, the fifteenth magnetic isolation air gap and the sixteenth magnetic isolation air gap.

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