Permanent magnet inter-pole asymmetric magnetic pole driving motor capable of reducing torque ripple

Abstract

The invention provides a permanent magnet inter-pole asymmetric magnetic pole driving motor capable of reducing torque pulsation, and belongs to the technical field of automobile motor electric appliances, magnetic poles on a rotor are formed by combining a plurality of pieces of permanent magnet steel and magnetic isolation air gaps, and the magnetic poles are asymmetrically designed in the aspects of rotor iron core structure shape, permanent magnet steel size and magnetic field distribution. The air-gap magnetic field generated by each magnetic pole is distributed in a multi-section mode, cogging torque and torque pulsation are reduced, multiple pieces of permanent magnet steel cooperate to gather magnetism, the magnetic field utilization rate is high, air-gap flux density is close to sine distribution, and the waveform distortion rate is small, so that electromagnetic torque fluctuation in the operation process of the motor is reduced, and the operation stability and the output stability of the motor are improved. Hysteresis loss and stator core eddy current loss are reduced, and motor power density and output efficiency are improved.

Description

Technical Field

[0001] This invention provides a permanent magnet asymmetric pole drive motor with reduced torque ripple, belonging to the field of automotive motor and electrical technology. Background Technology

[0002] Currently, most drive motors used in new energy vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have a simple structure, high controllability, wide speed range, relatively simple control circuits, and low cost, the magnetic field of a DC drive motor is generated by an electrically excited winding, resulting in high energy consumption and low output power. In addition, the presence of carbon brushes and mechanical commutators not only limits the overload capacity and speed of the drive motor, but also necessitates frequent maintenance and replacement of carbon brushes and commutators if the motor operates for a long time. DC motors have high energy consumption and a high failure rate, and their performance needs further improvement.

[0003] The purpose of this invention is to provide a permanent magnet asymmetric pole drive motor that overcomes the above-mentioned defects. This motor uses an asymmetric permanent magnet rotor with a high magnetic field strength, high power density, significant magnetization effect, compact structure, low torque ripple, and low cogging torque. The technical content is as follows: A permanent magnet asymmetric pole drive motor with reduced torque ripple consists of a front cover, a rear cover, a housing, a rotor, and a stator. Its characteristic is that the permanent magnet rotor has an asymmetric pole structure. The permanent magnet rotor with asymmetrical pole structure includes a shaft, a rotor core, and four rectangular permanent magnets: a first, a second, a third, a fourth, a fifth, a sixth, a seventh, a eighth, a ninth, a tenth, an eleventh, a twelfth, a thirteenth, a fourteenth, a fifteenth, a sixteenth, a seventeenth, an eighteenth, and a nineteenth rectangular permanent magnet; tile-shaped permanent magnets; and four magnetically isolated air gaps: a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth. The ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, and eighteenth magnetic air gaps each have a first rectangular slot penetrating the thickness of the rotor lamination near the outer circumference of the rotor lamination, to the left of the center line of the first N magnetic pole, and on a center line forming an angle of 11.25° with the center line of the first N magnetic pole. At the outer end of the first rectangular slot, a first arc-shaped magnetic air gap penetrating the thickness of the rotor lamination is provided. The outer end of the first arc-shaped magnetic air gap is not connected to the outer circumference of the rotor lamination, but the inner end of the first arc-shaped magnetic air gap is connected to the outer end of the first rectangular slot. The diameter of the arc-shaped magnetic air gap is larger than the width of the first rectangular slot. A first magnetic isolation air gap penetrating the thickness of the rotor lamination is provided. The outer end of the first magnetic isolation air gap is connected to the inner end of the first rectangular slot, and the width of the first magnetic isolation air gap is smaller than the width of the first rectangular slot. The inner end of the first magnetic isolation air gap is not connected to the inner circle of the rotor lamination. A second magnetic isolation air gap penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination and on the center line of the first N magnetic pole. The outer end of the second magnetic isolation air gap is not connected to the outer circle of the rotor lamination. A second rectangular slot penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination, on the left side of the center line of the first N magnetic pole and on the right side of the first rectangular slot. The center line of the second rectangular slot in the length direction is parallel to the center line of the first N magnetic pole. The upper end of the second rectangular slot is not connected to the outer circle of the rotor lamination. A second magnetic isolation air gap penetrating the thickness of the rotor lamination is provided at the lower end of the second rectangular slot. The system comprises twenty rectangular slots. The upper end of the twentieth rectangular slot is connected to the lower end of the second rectangular slot, and the length of the twentieth rectangular slot is less than the width of the second rectangular slot. A third magnetic isolation air gap, tangentially penetrating the thickness of the rotor lamination, is provided at the lower end of the twentieth rectangular slot. The upper end of the third magnetic isolation air gap is connected to the lower end of the twentieth rectangular slot, and the length of the third magnetic isolation air gap is greater than the length of the twentieth rectangular slot. The left end of the third magnetic isolation air gap is aligned with the left end of the twentieth rectangular slot. A twenty-first rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided at the right end of the third magnetic isolation air gap. The left end of the twenty-first rectangular slot is connected to the right end of the third magnetic isolation air gap, and the length of the twenty-first rectangular slot is equal to the width of the third magnetic isolation air gap. A third rectangular slot, tangentially penetrating the thickness of the rotor lamination, is also provided at the right end of the twenty-first rectangular slot.The left end of the third rectangular slot is connected to the right end of the twenty-first rectangular slot, and the width of the third rectangular slot is greater than the length of the twenty-first rectangular slot. At the right end of the third rectangular slot and to the left of the center line of the first N magnetic pole, a twenty-second rectangular slot is provided, penetrating the thickness of the rotor lamination. The left end of the twenty-second rectangular slot is connected to the right end of the third rectangular slot, and the length of the twenty-second rectangular slot is less than the width of the third rectangular slot. The right end of the twenty-second rectangular slot is connected to the second magnetic isolation air gap. Near the outer circle of the rotor lamination and to the right of the center line of the first N magnetic pole, a fourth rectangular slot is provided, penetrating the thickness of the rotor lamination. At the outer end of the fourth rectangular slot, a second arc-shaped magnetic isolation air gap is provided, penetrating the thickness of the rotor lamination. The outer end of the second arc-shaped magnetic isolation air gap is not connected to the outer circle of the rotor lamination, and the inner end of the second arc-shaped magnetic isolation air gap is connected to the fourth rectangular slot. The outer end is connected, and the diameter of the second arc-shaped magnetic air gap is greater than the width of the fourth rectangular slot. A twenty-third rectangular slot, penetrating the thickness of the rotor lamination, is provided at the inner end of the fourth rectangular slot and to the right of the center line of the first N magnetic pole. The upper end of the twenty-third rectangular slot is connected to the inner end of the fourth rectangular slot, and the length of the twenty-third rectangular slot is less than the width of the fourth rectangular slot. The lower end of the twenty-third rectangular slot is connected to the second magnetic air gap. A twenty-fourth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the inner end of the second magnetic air gap and to the right of the center line of the first N magnetic pole. The lower end of the twenty-fourth rectangular slot is on the same straight line as the lowest point of the inner end of the second magnetic air gap. The left end of the twenty-fourth rectangular slot is connected to the second magnetic air gap, and the length of the twenty-fourth rectangular slot is less than the length of the second magnetic air gap. The right end of the twenty-fourth rectangular slot... A fifth rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided at the end. The left end of the fifth rectangular slot connects to the right end of the twenty-fourth rectangular slot, and the width of the fifth rectangular slot is greater than the length of the twenty-fourth rectangular slot. A fourth magnetic isolation air gap, penetrating the thickness of the rotor lamination, is provided at the right end of the fifth rectangular slot. The lower end of the fourth magnetic isolation air gap is aligned with the lowest point of the inner end of the second magnetic isolation air gap. The left end of the fourth magnetic isolation air gap connects to the right end of the fifth rectangular slot, and the width of the fourth magnetic isolation air gap is less than the width of the fifth rectangular slot. A sixth rectangular slot, penetrating the thickness of the rotor lamination, is provided near the outer circumference of the rotor lamination, to the right of the center line of the first N magnetic pole, and to the left of the center line at an angle of 11.25° to the center line of the first N magnetic pole. The rightmost end of the sixth rectangular slot forms an angle of 11° with the right side of the center line of the first N magnetic pole. To the left of the .25° centerline, the outer end of the sixth rectangular slot is not connected to the outer circle of the rotor lamination, and the inner end of the sixth rectangular slot is connected to the right end of the fourth magnetic isolation gap. The width of the sixth rectangular slot is greater than the width of the fourth magnetic isolation gap. Near the outer circle of the rotor lamination, and on the right side of the fourth rectangular slot and the left side of the sixth rectangular slot, a fifth magnetic isolation gap penetrating the thickness of the rotor lamination is provided. The upper end of the fifth magnetic isolation gap is not connected to the outer circle of the rotor lamination, the outer end of the fourth rectangular slot, or the outer end of the sixth rectangular slot. The lower end of the fifth magnetic isolation gap is connected to the upper end of the fourth magnetic isolation gap. Near the inner circle of the rotor lamination, and on the center line of the first N magnetic pole, a sixth magnetic isolation gap penetrating the thickness of the rotor lamination is provided. The outer end of the sixth magnetic isolation gap is not connected to the inner end of the second magnetic isolation gap, and the inner end of the sixth magnetic isolation gap is not connected to the inner circle of the rotor lamination.A twenty-fifth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the left end of the sixth magnetic isolation air gap. The upper end of the twenty-fifth rectangular slot is on the same straight line as the outer end of the sixth magnetic isolation air gap. The right end of the twenty-fifth rectangular slot is connected to the sixth magnetic isolation air gap, and the length of the twenty-fifth rectangular slot is less than the length of the sixth magnetic isolation air gap. A seventh rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided at the left end of the twenty-fifth rectangular slot. The upper end of the seventh rectangular slot is not connected to the lower end of the third rectangular slot. The right end of the seventh rectangular slot is connected to the left end of the twenty-fifth rectangular slot, and the width of the seventh rectangular slot is greater than the length of the twenty-fifth rectangular slot. The left end of the seventh rectangular slot is not connected to the first magnetic isolation air gap, and the lower end of the seventh rectangular slot is on the same straight line as the lowest point of the inner end of the first magnetic isolation air gap. Along a clockwise direction, on the center line of the adjacent first S magnetic pole and near the outer circle of the rotor lamination, a seventh magnetic isolation gap penetrating the thickness of the rotor lamination is provided. The outer end of the seventh magnetic isolation gap is not connected to the outer circle of the rotor lamination. Near the outer circle of the rotor lamination and to the left of the center line of the first S magnetic pole, an eighth rectangular slot penetrating the thickness of the rotor lamination is provided. At the outer end of the eighth rectangular slot, a third arc-shaped magnetic isolation gap penetrating the thickness of the rotor lamination is provided. The outer end of the third arc-shaped magnetic isolation gap is not connected to the outer circle of the rotor lamination, but the inner end of the third arc-shaped magnetic isolation gap is connected to the outer end of the eighth rectangular slot, and the diameter of the circle of the third arc-shaped magnetic isolation gap is larger than the width of the eighth rectangular slot. At the inner end of the eighth rectangular slot and in the first S magnetic pole... A twenty-sixth rectangular slot, penetrating the thickness of the rotor lamination, is located to the left of the center line. The upper end of the twenty-sixth rectangular slot connects to the inner end of the eighth rectangular slot, and the length of the twenty-sixth rectangular slot is less than the width of the eighth rectangular slot. The lower end of the twenty-sixth rectangular slot connects to the seventh magnetic isolation air gap. A twenty-seventh rectangular slot, penetrating the thickness of the rotor lamination, is located inside the seventh magnetic isolation air gap and to the left of the center line of the first S magnetic pole. The lower end of the twenty-seventh rectangular slot is aligned with the lowest point of the inner end of the seventh magnetic isolation air gap. The right end of the twenty-seventh rectangular slot connects to the seventh magnetic isolation air gap, and the length of the twenty-seventh rectangular slot is less than the length of the seventh magnetic isolation air gap. A tangentially oriented slot, penetrating the thickness of the rotor lamination, is located at the left end of the twenty-seventh rectangular slot. The ninth rectangular slot has its right end connected to the left end of the twenty-seventh rectangular slot, and its width is greater than the length of the twenty-seventh rectangular slot. An eighth magnetic isolation air gap, penetrating the thickness of the rotor lamination, is provided at the left end of the ninth rectangular slot. The lower end of the eighth magnetic isolation air gap is aligned with the lowest point of the inner end of the seventh magnetic isolation air gap. The right end of the eighth magnetic isolation air gap is connected to the left end of the ninth rectangular slot, and its width is less than the width of the ninth rectangular slot. Near the outer circumference of the rotor lamination, to the left of the center line of the first S magnetic pole and to the right of the center line at an angle of 11.25° to the center line of the first S magnetic pole, a tenth rectangular slot, penetrating the thickness of the rotor lamination, is provided. The leftmost end of the tenth rectangular slot is connected to the center line of the first S magnetic pole. The tenth rectangular slot is located to the right of the center line of the magnetic pole center line at an angle of 11.25° to the left. The outer end of the tenth rectangular slot is not connected to the outer circle of the rotor lamination. The inner end of the tenth rectangular slot is connected to the left end of the eighth magnetic isolation air gap, and the width of the tenth rectangular slot is greater than the width of the eighth magnetic isolation air gap. Near the outer circle of the rotor lamination, on the left side of the eighth rectangular slot and the right side of the tenth rectangular slot, there is a ninth magnetic isolation air gap that penetrates the thickness of the rotor lamination. The upper end of the ninth magnetic isolation air gap is not connected to the outer circle of the rotor lamination, the outer end of the eighth rectangular slot, or the outer end of the tenth rectangular slot. The lower end of the ninth magnetic isolation air gap is connected to the upper end of the eighth magnetic isolation air gap. Near the outer circle of the rotor lamination, on the right side of the center line of the first S magnetic pole, at an angle of 11° to the center line of the first S magnetic pole.To the left of the 25° centerline, there are two eleventh rectangular slots with an inverted "V" shape, penetrating the thickness of the rotor lamination. The leftmost end of the eleventh rectangular slot on the left side of the two eleventh rectangular slots with the inverted "V" shape is not connected to the right end of the seventh magnetic gap. The outer ends of the two eleventh rectangular slots with the inverted "V" shape are not connected to the outer circle of the rotor lamination, and the inner ends of the two eleventh rectangular slots with the inverted "V" shape are not connected. Near the outer circle of the rotor lamination, to the right of the center line of the first S magnetic pole, and at an angle of [missing information] to the center line of the first S magnetic pole... A thirteenth rectangular slot, penetrating the thickness of the rotor lamination, is located on the center line at 11.25°. A fourth arc-shaped magnetic isolation air gap, also penetrating the thickness of the rotor lamination, is located at the outer end of the thirteenth rectangular slot. The outer end of the fourth arc-shaped magnetic isolation air gap is not connected to the outer circle of the rotor lamination, but the inner end of the fourth arc-shaped magnetic isolation air gap is connected to the outer end of the thirteenth rectangular slot, and the diameter of the fourth arc-shaped magnetic isolation air gap is larger than the width of the thirteenth rectangular slot. An eleventh magnetic isolation air gap, penetrating the thickness of the rotor lamination, is located at the inner end of the thirteenth rectangular slot. The outer end of the eleventh magnetic isolation air gap is connected to the inner end of the thirteenth rectangular slot. The eleventh magnetic gap is connected to the rotor lamination, and its width is smaller than that of the thirteenth rectangular slot. The inner end of the eleventh magnetic gap is not connected to the inner circle of the rotor lamination. Near the inner circle of the rotor lamination and on the center line of the first S magnetic pole, a tenth magnetic gap is provided, penetrating the thickness of the rotor lamination. The outer end of the tenth magnetic gap is not connected to the inner end of the seventh magnetic gap. The inner end of the tenth magnetic gap is not connected to the inner circle of the rotor lamination. A twenty-eighth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the right end of the tenth magnetic gap. The upper end of the twenty-eighth rectangular slot is connected to the outer end of the tenth magnetic gap at the same distance. On a straight line, the left end of the twenty-eighth rectangular slot is connected to the tenth magnetic isolation air gap, and the length of the twenty-eighth rectangular slot is less than the length of the tenth magnetic isolation air gap. At the right end of the twenty-eighth rectangular slot, a twelfth rectangular slot with a tangential structure penetrating the thickness of the rotor lamination is provided. The left end of the twelfth rectangular slot is connected to the right end of the twenty-eighth rectangular slot, and the width of the twelfth rectangular slot is greater than the length of the twenty-eighth rectangular slot. The right end of the twelfth rectangular slot is not connected to the eleventh magnetic isolation air gap. The lower end of the twelfth rectangular slot is on the same straight line as the lowest point of the inner end of the eleventh magnetic isolation air gap. Along the clockwise direction, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the right of the thirteenth rectangular slot, there is a tile-shaped slot that penetrates the thickness of the rotor lamination. The inner arc surface of the tile-shaped slot faces the outer circle of the rotor lamination. The outer end of the tile-shaped slot is not connected to the outer circle of the rotor lamination, and the inner end of the tile-shaped slot is not connected to the inner circle of the rotor lamination. At the rightmost end of the tile-shaped slot, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the left of the center line at an angle of 11.25° with the center line of the second N magnetic pole, there are two inverted "V" shaped slots that penetrate the thickness of the rotor lamination. The fourteenth rectangular slot, which has an inverted "V" shape, has a length that is shorter than that of the fourteenth rectangular slot on the left. The outer ends of the two fourteenth rectangular slots with the inverted "V" shape are not connected to the outer circle of the rotor lamination. The leftmost end of the fourteenth rectangular slot on the left is to the right of the center line of the second N magnetic pole, and the rightmost end of the fourteenth rectangular slot on the right has an angle of 11° with the right side of the center line of the second N magnetic pole.To the left of the 25° centerline, on the left side of the fourteenth rectangular slot (forming an inverted "8" shape), there is a twelfth magnetic air gap penetrating the thickness of the rotor lamination. The outer end of the twelfth magnetic air gap connects to the inner end of the fourteenth rectangular slot (forming an inverted "8" shape), and the width of the twelfth magnetic air gap is smaller than the width of the fourteenth rectangular slot (forming an inverted "8" shape). The inner end of the twelfth magnetic air gap does not connect to the inner circle of the rotor lamination. The inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the "8" shape structure is provided with a thirteenth magnetic isolation air gap that penetrates the thickness of the rotor lamination. The outer end of the thirteenth magnetic isolation air gap is connected to the inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "8" shape structure, and the width of the thirteenth magnetic isolation air gap is smaller than the width of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "8" shape structure. The inner end of the thirteenth magnetic isolation air gap is not connected to the inner circle of the rotor lamination. The inner end of the thirteenth magnetic isolation air gap is connected to the inner end of the twelfth magnetic isolation air gap. The thirteenth magnetic air gap and the twelfth magnetic air gap are on the same straight line. Near the outer circle of the rotor lamination, and to the right of the fourteenth rectangular slot (which forms an inverted "8" shape) and to the left of the fourteenth rectangular slot (which forms an inverted "8" shape), a fifteenth rectangular slot penetrating the thickness of the rotor lamination is provided. The length of the fifteenth rectangular slot is less than the length of the fourteenth rectangular slot (which forms an inverted "8" shape) to the left of the fourteenth rectangular slot (which forms an inverted "8" shape). The outer end of the fifteenth rectangular slot is not connected to the outer circle of the rotor lamination or to the outer end of the fourteenth rectangular slot (which forms an inverted "8" shape). A fourteenth magnetic air gap penetrating the thickness of the rotor lamination is provided at the inner end of the fifteenth rectangular slot. The outer end of the fourteenth magnetic air gap is connected to the inner end of the fifteenth rectangular slot, and the width of the fourteenth magnetic air gap is less than the width of the fifteenth rectangular slot. The inner end of the fourteenth magnetic air gap is not connected to the twelfth magnetic air gap or to the right of the fourteenth rectangular slot (which forms an inverted "8" shape). Along the clockwise direction, to the left of the center line of the second S magnetic pole and near the outer circle of the rotor lamination, and to the right of the center line at an angle of 11.25° with the center line of the second S magnetic pole, there are two sixteenth rectangular slots with an inverted "V" shape, penetrating the thickness of the rotor lamination. The length of the sixteenth rectangular slot on the left is greater than the length of the sixteenth rectangular slot on the right. The outer ends of the sixteenth rectangular slots are not connected to the outer circle of the rotor lamination. The leftmost end of the sixteenth rectangular slot on the left is to the right of the center line at an angle of 11.25° with the left side of the center line of the second S magnetic pole, forming an inverted "V" shape. The rightmost end of the sixteenth rectangular slot on the right of the two sixteenth rectangular slots is to the left of the center line of the second S magnetic pole. A fifteenth magnetic air gap, penetrating the thickness of the rotor lamination, is located inside the sixteenth rectangular slot on the left of the two sixteenth rectangular slots, which have an inverted "V" shape. The outer end of the fifteenth magnetic air gap is connected to the inner end of the sixteenth rectangular slot on the left of the two sixteenth rectangular slots, which have an inverted "V" shape, and the width of the fifteenth magnetic air gap is smaller than the width of the sixteenth rectangular slot on the left of the two sixteenth rectangular slots, which have an inverted "V" shape. The inner end of the fifteenth magnetic air gap is not connected to the inner circle of the rotor lamination. A sixteenth magnetic air gap, penetrating the thickness of the rotor lamination, is located inside the sixteenth rectangular slot on the right of the two sixteenth rectangular slots, which have an inverted "V" shape. The outer end of the sixteenth magnetic air gap... The sixteenth magnetic air gap, which is connected to the inner end of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape, has a width smaller than that of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape. The inner end of the sixteenth magnetic air gap is not connected to the inner circle of the rotor lamination. The inner end of the sixteenth magnetic air gap is not connected to the inner end of the fifteenth magnetic air gap. The inner ends of the sixteenth magnetic air gap and the fifteenth magnetic air gap are on the same straight line. Near the outer circle of the rotor lamination, and to the right of the sixteenth rectangular slot to the left of the two sixteenth rectangular slots in an inverted "V" shape, and to the left of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape, is a seventeenth rectangular slot penetrating the thickness of the rotor lamination. The length of the seventeenth rectangular slot... The length of the seventeenth rectangular slot is less than that of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape. The outer end of the seventeenth rectangular slot is not connected to the outer circle of the rotor lamination or the outer end of the sixteenth rectangular slot to the left of the two sixteenth rectangular slots with an inverted "V" shape. A seventeenth magnetic air gap penetrating the thickness of the rotor lamination is provided at the inner end of the seventeenth rectangular slot. The outer end of the seventeenth magnetic air gap is connected to the inner end of the seventeenth rectangular slot, and the width of the seventeenth magnetic air gap is less than the width of the seventeenth rectangular slot. The inner end of the seventeenth magnetic air gap is not connected to the sixteenth magnetic air gap or the left side of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape. An eighteenth rectangular slot penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination and to the right of the center line of the second S magnetic pole.The centerline of the eighteenth rectangular slot along its length is parallel to the centerline of the second S magnetic pole. The left end of the eighteenth rectangular slot is to the right of the centerline of the second S magnetic pole. The upper end of the eighteenth rectangular slot is not connected to the outer circle of the rotor lamination. A twenty-ninth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the lower end of the eighteenth rectangular slot. The upper end of the twenty-ninth rectangular slot is connected to the lower end of the eighteenth rectangular slot, and the length of the twenty-ninth rectangular slot is less than the width of the eighteenth rectangular slot. An eighteenth magnetic isolation air gap, penetrating the thickness of the rotor lamination, is provided at the lower end of the twenty-ninth rectangular slot. The upper end of the eighteenth magnetic isolation air gap is connected to the lower end of the twenty-ninth rectangular slot, and the length of the eighteenth magnetic isolation air gap is greater than the length of the twenty-ninth rectangular slot. The lower end of the eighteenth magnetic isolation air gap is not connected to the inner circle of the rotor lamination. The left end of the eighteenth magnetic isolation air gap is on the same straight line as the left end of the twenty-ninth rectangular slot. Near the outer circle of the rotor lamination and to the right of the eighteenth rectangular slot, and adjacent to the centerline of the second S magnetic pole... A nineteenth rectangular slot, penetrating the thickness of the rotor lamination, is provided to the left of the center line with an included angle of 11.25°. The center line of the nineteenth rectangular slot along its length is parallel to the center line of the second S magnetic pole. The left end of the nineteenth rectangular slot is not connected to the right end of the eighteenth rectangular slot, and the right end of the nineteenth rectangular slot is to the left of the center line with an included angle of 11.25° to the right of the center line of the second S magnetic pole. The upper end of the nineteenth rectangular slot is not connected to the outer circle of the rotor lamination. A thirtieth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the lower end of the nineteenth rectangular slot. The upper end of the thirtieth rectangular slot is connected to the lower end of the nineteenth rectangular slot, and the length of the thirtieth rectangular slot is less than the width of the nineteenth rectangular slot. The lower end of the thirtieth rectangular slot is connected to the upper end of the eighteenth magnetic gap, and the right end of the thirtieth rectangular slot is on the same straight line as the right end of the eighteenth magnetic gap. The rotor laminations are stacked and welded with the burrs facing in one direction to form the rotor core. A first rectangular permanent magnet with an N pole on its right end face is placed in the first rectangular slot; a second rectangular permanent magnet with an N pole on its right end face is placed in the second rectangular slot; a third rectangular permanent magnet with an N pole on its upper end face is placed in the third rectangular slot; a fourth rectangular permanent magnet with an N pole on its left end face is placed in the fourth rectangular slot; a fifth rectangular permanent magnet with an N pole on its upper end face is placed in the fifth rectangular slot; a sixth rectangular permanent magnet with an N pole on its left end face is placed in the sixth rectangular slot; a seventh rectangular permanent magnet with an N pole on its upper end face is placed in the seventh rectangular slot, forming the first N pole of the permanent magnet rotor; an eighth rectangular permanent magnet with an S pole on its right end face is placed in the eighth rectangular slot; and a ninth rectangular permanent magnet with an S pole on its upper end face is placed in the seventh rectangular slot. The tenth rectangular permanent magnet, with its right end face having an S pole polarity, is placed in the ninth rectangular slot. Two identical eleventh rectangular permanent magnets, with their opposite sides both having S pole polarities, are placed in two inverted "V"-shaped eleventh rectangular slots on the rotor core. The twelfth rectangular permanent magnet, with its upper end face having an S pole polarity, is placed in the twelfth rectangular slot. The thirteenth rectangular permanent magnet, with its left end face having an S pole polarity, is placed in the thirteenth rectangular slot, forming the first S pole of the permanent magnet rotor. Tile-shaped permanent magnets with an inner arc surface having an N pole polarity are placed in tile-shaped slots. The fifteenth rectangular permanent magnet, with its left end face having an N pole polarity, is placed in the fifteenth rectangular slot. [The text then repeats the last sentence about different lengths of permanent magnets.] Two fourteenth rectangular permanent magnets are placed in the rotor core in an inverted "V" shape, with both sides having N poles. The shorter magnet is placed in the left slot of the two slots, and the longer magnet is placed in the right slot, forming the second N pole of the permanent magnet rotor. A seventeenth rectangular permanent magnet with S pole polarity on its right end is placed in the seventeenth slot. Two sixteenth rectangular permanent magnets of different lengths are placed in the slot with both sides having S poles. The permanent magnets are placed in two sixteenth rectangular slots on the rotor core in an inverted "V" shape. The longer sixteenth rectangular permanent magnet is placed in the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots on the rotor core, and the shorter sixteenth rectangular permanent magnet is placed in the sixteenth rectangular slot on the right side of the two sixteenth rectangular slots on the rotor core. The eighteenth rectangular permanent magnet with the S pole on its right end face is placed in the eighteenth rectangular slot, and the nineteenth rectangular permanent magnet with the S pole on its left end face is placed in the nineteenth rectangular slot, forming the second S pole of the permanent magnet rotor. This process is repeated to form a permanent magnet rotor with an asymmetrical pole structure with N and S poles arranged alternately. The rotor core is then press-fitted onto the shaft.

[0004] Compared with existing technologies, the magnetic poles on the rotor of this invention are composed of multiple permanent magnet steels and magnetically insulating air gaps. The magnetic poles are designed asymmetrically in terms of rotor core structure shape, permanent magnet steel size, and magnetic field distribution. The air gap magnetic field generated by each magnetic pole is distributed in a multi-segment manner, which reduces cogging torque and torque pulsation. The multiple permanent magnet steels work together to concentrate magnetism, resulting in high magnetic field utilization. The air gap magnetic flux density is close to a sinusoidal distribution with low waveform distortion, thereby reducing electromagnetic torque fluctuations during motor operation, improving motor running smoothness and output stability, reducing hysteresis loss and stator core eddy current loss, and improving motor power density and output efficiency. Attached Figure Description

[0005] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of the permanent magnet rotor with an asymmetric pole structure shown in the embodiment.

[0006] In the diagram: 1. Rear end cover; 2. Shaft; 3. Rotor core; 4. Third rectangular permanent magnet; 5. Seventh rectangular permanent magnet; 6. Housing; 7. Stator; 8. Front end cover; 9. Twelfth rectangular permanent magnet; 10. Eleventh rectangular permanent magnet; 11. First rectangular permanent magnet; 12. Second rectangular permanent magnet; 13. Fourth rectangular permanent magnet; 14. Fifth rectangular permanent magnet; 15. Sixth rectangular permanent magnet; 16. Eighth rectangular permanent magnet; 17. Ninth rectangular permanent magnet; 18. Tenth rectangular permanent magnet; 19. Thirteenth rectangular permanent magnet; 20. Tile-shaped permanent magnet; 21. Fourteenth rectangular permanent magnet; 22. Fifteenth rectangular permanent magnet; 23. Sixteenth rectangular permanent magnet. 24. Seventeenth rectangular permanent magnet steel; 25. Eighteenth rectangular permanent magnet steel; 26. Nineteenth rectangular permanent magnet steel; 27. First magnetic isolation air gap; 28. Second magnetic isolation air gap; 29. ​​Third magnetic isolation air gap; 30. Fourth magnetic isolation air gap; 31. Fifth magnetic isolation air gap; 32. Sixth magnetic isolation air gap; 33. Seventh magnetic isolation air gap; 34. Eighth magnetic isolation air gap; 35. Ninth magnetic isolation air gap; 36. Tenth magnetic isolation air gap; 37. Eleventh magnetic isolation air gap; 38. Twelfth magnetic isolation air gap; 39. Thirteenth magnetic isolation air gap; 40. Fourteenth magnetic isolation air gap; 41. Fifteenth magnetic isolation air gap; 42. Sixteenth magnetic isolation air gap; 43. Seventeenth magnetic isolation air gap; 44. Eighteenth magnetic isolation air gap. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings: A permanent magnet asymmetric pole drive motor with reduced torque ripple is composed of a front cover 8, a rear cover 1, a housing 6, a rotor, and a stator 7. Its characteristic is that the permanent magnet rotor has an asymmetric pole structure. The permanent magnet rotor with asymmetric pole structure includes a shaft 2, a rotor core 3, a first rectangular permanent magnet 11, a second rectangular permanent magnet 12, a third rectangular permanent magnet 4, a fourth rectangular permanent magnet 13, a fifth rectangular permanent magnet 14, a sixth rectangular permanent magnet 15, a seventh rectangular permanent magnet 5, an eighth rectangular permanent magnet 16, a ninth rectangular permanent magnet 17, a tenth rectangular permanent magnet 18, an eleventh rectangular permanent magnet 10, a twelfth rectangular permanent magnet 9, a thirteenth rectangular permanent magnet 19, a fourteenth rectangular permanent magnet 21, a fifteenth rectangular permanent magnet 22, a sixteenth rectangular permanent magnet 23, a seventeenth rectangular permanent magnet 24, an eighteenth rectangular permanent magnet 25, a nineteenth rectangular permanent magnet 26, a tile-shaped permanent magnet 20, a first magnetic isolation air gap 27, and a second magnetic isolation air gap. 28. Third magnetic air gap; 29. ​​Fourth magnetic air gap; 30. Fifth magnetic air gap; 31. Sixth magnetic air gap; 32. Seventh magnetic air gap; 33. Eighth magnetic air gap; 34. Ninth magnetic air gap; 35. Tenth magnetic air gap; 36. Eleventh magnetic air gap; 37. Twelfth magnetic air gap; 38. Thirteenth magnetic air gap; 39. Fourteenth magnetic air gap; 40. Fifteenth magnetic air gap; 41. Sixteenth magnetic air gap; 42. Seventeenth magnetic air gap; 43. Eighteenth magnetic air gap; 44. Near the outer circle of the rotor lamination, to the left of the center line of the first N magnetic pole, and on the center line with an angle of 11.25° with the center line of the first N magnetic pole, a first rectangular groove penetrating the thickness of the rotor lamination is provided. At the outer end of the first rectangular groove, a first arc-shaped magnetic air gap penetrating the thickness of the rotor lamination is provided. The air gaps are as follows: the outer end of the first arc-shaped magnetic isolation air gap is not connected to the outer circle of the rotor lamination, and the inner end of the first arc-shaped magnetic isolation air gap is connected to the outer end of the first rectangular slot. The diameter of the first arc-shaped magnetic isolation air gap is larger than the width of the first rectangular slot. A first magnetic isolation air gap 27 penetrating the thickness of the rotor lamination is provided at the inner end of the first rectangular slot. The outer end of the first magnetic isolation air gap 27 is connected to the inner end of the first rectangular slot, and the width of the first magnetic isolation air gap 27 is smaller than the width of the first rectangular slot. The inner end of the first magnetic isolation air gap 27 is not connected to the inner circle of the rotor lamination. A second magnetic isolation air gap 28 penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination and on the center line of the first N magnetic pole. The outer end of the second magnetic isolation air gap 28 is not connected to the outer circle of the rotor lamination. A second rectangular slot, penetrating the thickness of the rotor lamination, is provided on the left side of the first rectangular slot and on the right side of the first rectangular slot. The centerline of the second rectangular slot along its length is parallel to the centerline of the first N magnetic pole. The upper end of the second rectangular slot is not connected to the outer circle of the rotor lamination. A twentieth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the lower end of the second rectangular slot. The upper end of the twentieth rectangular slot is connected to the lower end of the second rectangular slot, and the length of the twentieth rectangular slot is less than the width of the second rectangular slot. A third magnetic isolation air gap 29, tangentially penetrating the thickness of the rotor lamination, is provided at the lower end of the twentieth rectangular slot. The upper end of the third magnetic isolation air gap 29 is connected to the lower end of the twentieth rectangular slot, and the length of the third magnetic isolation air gap 29 is greater than the length of the twentieth rectangular slot. The left end of the third magnetic isolation air gap 29 is on the same straight line as the left end of the twentieth rectangular slot.A 21st rectangular slot, penetrating the thickness of the rotor lamination, is provided at the right end of the third magnetic isolation air gap 29. The left end of the 21st rectangular slot is connected to the right end of the third magnetic isolation air gap 29, and the length of the 21st rectangular slot is equal to the width of the third magnetic isolation air gap 29. At the right end of the 21st rectangular slot, a third rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided. The left end of the third rectangular slot is connected to the right end of the 21st rectangular slot, and the width of the third rectangular slot is greater than the length of the 21st rectangular slot. At the right end of the third rectangular slot and to the left of the center line of the first N magnetic pole, a 22nd rectangular slot, penetrating the thickness of the rotor lamination, is provided. The left end of the 22nd rectangular slot is connected to the right end of the third rectangular slot, and the length of the 22nd rectangular slot is less than the width of the third rectangular slot. The right end of the 22nd rectangular slot is connected to the second magnetic isolation air gap 28. A fourth rectangular slot, penetrating the thickness of the rotor lamination, is provided near the outer circumference of the rotor lamination and to the right of the center line of the first N magnetic pole. A second arc-shaped magnetic air gap, penetrating the thickness of the rotor lamination, is provided at the outer end of the fourth rectangular slot. The outer end of the second arc-shaped magnetic air gap is not connected to the outer circumference of the rotor lamination, but the inner end of the second arc-shaped magnetic air gap is connected to the outer end of the fourth rectangular slot, and the diameter of the second arc-shaped magnetic air gap is greater than the width of the fourth rectangular slot. A twenty-third rectangular slot, penetrating the thickness of the rotor lamination, is provided at the inner end of the fourth rectangular slot and to the right of the center line of the first N magnetic pole. The upper end of the twenty-third rectangular slot is connected to the inner end of the fourth rectangular slot, and the length of the twenty-third rectangular slot is less than the width of the fourth rectangular slot. The lower end of the twenty-third rectangular slot is connected to the second magnetic air gap 28. A 24th rectangular slot, penetrating the thickness of the rotor lamination, is provided at the inner end of the 8th magnetic pole and to the right of the center line of the first N magnetic pole. The lower end of the 24th rectangular slot is on the same straight line as the lowest end of the inner end of the second magnetic isolation air gap 28. The left end of the 24th rectangular slot is connected to the second magnetic isolation air gap 28, and the length of the 24th rectangular slot is less than the length of the second magnetic isolation air gap 28. A 5th rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided at the right end of the 24th rectangular slot. The left end of the 5th rectangular slot is connected to the right end of the 24th rectangular slot, and the width of the 5th rectangular slot is greater than the length of the 24th rectangular slot. A 4th magnetic isolation air gap 30, penetrating the thickness of the rotor lamination, is provided at the right end of the 5th rectangular slot. The lower end of the 4th magnetic isolation air gap 30 is on the same straight line as the lowest end of the inner end of the second magnetic isolation air gap 28. The left end of the magnetic air gap 30 is connected to the right end of the fifth rectangular slot, and the width of the fourth magnetic air gap 30 is smaller than the width of the fifth rectangular slot. Near the outer circle of the rotor lamination, to the right of the center line of the first N magnetic pole and to the left of the center line at an angle of 11.25° to the center line of the first N magnetic pole, a sixth rectangular slot penetrating the thickness of the rotor lamination is provided. The rightmost end of the sixth rectangular slot is to the left of the center line at an angle of 11.25° to the right of the center line of the first N magnetic pole. The outer end of the sixth rectangular slot is not connected to the outer circle of the rotor lamination. The inner end of the sixth rectangular slot is connected to the right end of the fourth magnetic air gap 30, and the width of the sixth rectangular slot is greater than the width of the fourth magnetic air gap 30. Near the outer circle of the rotor lamination, to the right of the fourth rectangular slot and to the left of the sixth rectangular slot, a fifth magnetic air gap 31 penetrating the thickness of the rotor lamination is provided.The upper end of the fifth magnetic isolation air gap 31 is not connected to the outer circle of the rotor lamination, the outer end of the fourth rectangular slot, or the outer end of the sixth rectangular slot. The lower end of the fifth magnetic isolation air gap 31 is connected to the upper end of the fourth magnetic isolation air gap 30. A sixth magnetic isolation air gap 32, penetrating the thickness of the rotor lamination, is located near the inner circle of the rotor lamination and on the center line of the first N magnetic pole. The outer end of the sixth magnetic isolation air gap 32 is not connected to the inner end of the second magnetic isolation air gap 28, nor is the inner end of the sixth magnetic isolation air gap 32 connected to the inner circle of the rotor lamination. A twenty-fifth rectangular slot, penetrating the thickness of the rotor lamination, is located at the left end of the sixth magnetic isolation air gap 32. The upper end of the twenty-fifth rectangular slot is connected to the outer end of the sixth magnetic isolation air gap 32. The ends are on the same straight line. The right end of the twenty-fifth rectangular slot is connected to the sixth magnetic isolation air gap 32, and the length of the twenty-fifth rectangular slot is less than the length of the sixth magnetic isolation air gap 32. A seventh rectangular slot with a tangential structure penetrating the thickness of the rotor lamination is provided at the left end of the twenty-fifth rectangular slot. The upper end of the seventh rectangular slot is not connected to the lower end of the third rectangular slot. The right end of the seventh rectangular slot is connected to the left end of the twenty-fifth rectangular slot, and the width of the seventh rectangular slot is greater than the length of the twenty-fifth rectangular slot. The left end of the seventh rectangular slot is not connected to the first magnetic isolation air gap 27. The lower end of the seventh rectangular slot is on the same straight line as the lowest end of the inner end of the first magnetic isolation air gap 27. Along a clockwise direction, a seventh magnetic isolation gap 33, penetrating the thickness of the rotor lamination, is provided on the center line of the adjacent first S magnetic pole and near the outer circle of the rotor lamination. The outer end of the seventh magnetic isolation gap 33 is not connected to the outer circle of the rotor lamination. Near the outer circle of the rotor lamination and to the left of the center line of the first S magnetic pole, an eighth rectangular slot, penetrating the thickness of the rotor lamination, is provided. At the outer end of the eighth rectangular slot, a third arc-shaped magnetic isolation gap, penetrating the thickness of the rotor lamination, is provided. The outer end of the third arc-shaped magnetic isolation gap is not connected to the outer circle of the rotor lamination, but the inner end of the third arc-shaped magnetic isolation gap is connected to the outer end of the eighth rectangular slot, and the diameter of the circle of the third arc-shaped magnetic isolation gap is larger than the width of the eighth rectangular slot. At the inner end of the eighth rectangular slot and to the left of the center line of the first S magnetic pole, a... A twenty-sixth rectangular slot penetrates the thickness of the rotor lamination. The upper end of the twenty-sixth rectangular slot is connected to the inner end of the eighth rectangular slot, and the length of the twenty-sixth rectangular slot is less than the width of the eighth rectangular slot. The lower end of the twenty-sixth rectangular slot is connected to the seventh magnetic isolation air gap 33. A twenty-seventh rectangular slot penetrating the thickness of the rotor lamination is provided at the inner end of the seventh magnetic isolation air gap 33 and to the left of the center line of the first S magnetic pole. The lower end of the twenty-seventh rectangular slot is on the same straight line as the lowest end of the inner end of the seventh magnetic isolation air gap 33. The right end of the twenty-seventh rectangular slot is connected to the seventh magnetic isolation air gap 33, and the length of the twenty-seventh rectangular slot is less than the length of the seventh magnetic isolation air gap 33. A ninth rectangular slot penetrating the thickness of the rotor lamination in a tangential structure is provided at the left end of the twenty-seventh rectangular slot. The ninth rectangular slot has its right end connected to the left end of the twenty-seventh rectangular slot, and its width is greater than the length of the twenty-seventh rectangular slot. An eighth magnetic isolation air gap 34, penetrating the thickness of the rotor lamination, is provided at the left end of the ninth rectangular slot. The lower end of the eighth magnetic isolation air gap 34 is aligned with the lowest point of the inner end of the seventh magnetic isolation air gap 33. The right end of the eighth magnetic isolation air gap 34 is connected to the left end of the ninth rectangular slot, and its width is less than the width of the ninth rectangular slot. Near the outer circumference of the rotor lamination, to the left of the center line of the first S magnetic pole and to the right of the center line at an angle of 11.25° to the center line of the first S magnetic pole, a tenth rectangular slot, penetrating the thickness of the rotor lamination, is provided. The leftmost end of the tenth rectangular slot is connected to the center line of the first S magnetic pole. On the right side of the center line with an angle of 11.25° to the left of the center line, the outer end of the tenth rectangular slot is not connected to the outer circle of the rotor lamination, and the inner end of the tenth rectangular slot is connected to the left end of the eighth magnetic isolation air gap 34. The width of the tenth rectangular slot is greater than the width of the eighth magnetic isolation air gap 34. Near the outer circle of the rotor lamination, on the left side of the eighth rectangular slot and the right side of the tenth rectangular slot, there is a ninth magnetic isolation air gap 35 that penetrates the thickness of the rotor lamination. The upper end of the ninth magnetic isolation air gap 35 is not connected to the outer circle of the rotor lamination, the outer end of the eighth rectangular slot, or the outer end of the tenth rectangular slot. The lower end of the ninth magnetic isolation air gap 35 is connected to the upper end of the eighth magnetic isolation air gap 34. Near the outer circle of the rotor lamination, on the right side of the center line of the first S magnetic pole, and at an angle of 11° to the center line of the first S magnetic pole.To the left of the 25° centerline, there are two eleventh rectangular slots with an inverted "V" shape, penetrating the thickness of the rotor lamination. The leftmost end of the eleventh rectangular slot on the left side of the two inverted "V" shaped slots is not connected to the right end of the seventh magnetic gap 33. The outer ends of the two eleventh rectangular slots with the inverted "V" shape are not connected to the outer circle of the rotor lamination, and the inner ends of the two eleventh rectangular slots with the inverted "V" shape are not connected. Near the outer circle of the rotor lamination, to the right of the center line of the first S magnetic pole, and at an angle of 11.25° to the center line of the first S magnetic pole. A thirteenth rectangular slot, penetrating the thickness of the rotor lamination, is provided along the center line. A fourth arc-shaped magnetic air gap, also penetrating the thickness of the rotor lamination, is provided at the outer end of the thirteenth rectangular slot. The outer end of the fourth arc-shaped magnetic air gap is not connected to the outer circle of the rotor lamination, but the inner end of the fourth arc-shaped magnetic air gap is connected to the outer end of the thirteenth rectangular slot, and the diameter of the fourth arc-shaped magnetic air gap is larger than the width of the thirteenth rectangular slot. An eleventh magnetic air gap 37, penetrating the thickness of the rotor lamination, is provided at the inner end of the thirteenth rectangular slot. The outer end of the eleventh magnetic air gap 37 is connected to the inner end of the thirteenth rectangular slot, and the eleventh magnetic air gap... The width of the air gap 37 is smaller than the width of the thirteenth rectangular slot. The inner end of the eleventh magnetic air gap 37 is not connected to the inner circle of the rotor lamination. Near the inner circle of the rotor lamination and on the center line of the first S magnetic pole, there is a tenth magnetic air gap 36 that penetrates the thickness of the rotor lamination. The outer end of the tenth magnetic air gap 36 is not connected to the inner end of the seventh magnetic air gap 33. The inner end of the tenth magnetic air gap 36 is not connected to the inner circle of the rotor lamination. At the right end of the tenth magnetic air gap 36, there is a twenty-eighth rectangular slot that penetrates the thickness of the rotor lamination. The upper end of the twenty-eighth rectangular slot is at the same level as the outer end of the tenth magnetic air gap 36. On a straight line, the left end of the twenty-eighth rectangular slot is connected to the tenth magnetic isolation air gap 36, and the length of the twenty-eighth rectangular slot is less than the length of the tenth magnetic isolation air gap 36. At the right end of the twenty-eighth rectangular slot, a twelfth rectangular slot with a tangential structure penetrating the thickness of the rotor lamination is provided. The left end of the twelfth rectangular slot is connected to the right end of the twenty-eighth rectangular slot, and the width of the twelfth rectangular slot is greater than the length of the twenty-eighth rectangular slot. The right end of the twelfth rectangular slot is not connected to the eleventh magnetic isolation air gap 37. The lower end of the twelfth rectangular slot and the lowest end of the inner end of the eleventh magnetic isolation air gap 37 are on the same straight line. Along the clockwise direction, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the right of the thirteenth rectangular slot, there is a tile-shaped slot that penetrates the thickness of the rotor lamination. The inner arc surface of the tile-shaped slot faces the outer circle of the rotor lamination. The outer end of the tile-shaped slot is not connected to the outer circle of the rotor lamination, and the inner end of the tile-shaped slot is not connected to the inner circle of the rotor lamination. At the rightmost end of the tile-shaped slot, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the left of the center line at an angle of 11.25° with the center line of the second N magnetic pole, there are two inverted "V" shaped slots that penetrate the thickness of the rotor lamination. The fourteenth rectangular slot, which has an inverted "V" shape, has a length that is shorter than that of the fourteenth rectangular slot on the left. The outer ends of the two fourteenth rectangular slots with the inverted "V" shape are not connected to the outer circle of the rotor lamination. The leftmost end of the fourteenth rectangular slot on the left is to the right of the center line of the second N magnetic pole, and the rightmost end of the fourteenth rectangular slot on the right has an angle of 11° with the right side of the center line of the second N magnetic pole.To the left of the 25° centerline, on the left side of the fourteenth rectangular slot in the inverted "V" shape, there is a twelfth magnetic air gap 38 that penetrates the thickness of the rotor lamination. The outer end of the twelfth magnetic air gap 38 is connected to the inner end of the fourteenth rectangular slot in the inverted "V" shape, and the width of the twelfth magnetic air gap 38 is smaller than the width of the fourteenth rectangular slot in the inverted "V" shape. The inner end of the twelfth magnetic air gap 38 is not connected to the inner circle of the rotor lamination. The inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the "V" shape structure is provided with a thirteenth magnetic isolation air gap 39 that penetrates the thickness of the rotor lamination. The outer end of the thirteenth magnetic isolation air gap 39 is connected to the inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "V" shape structure, and the width of the thirteenth magnetic isolation air gap 39 is smaller than the width of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "V" shape structure. The inner end of the thirteenth magnetic isolation air gap 39 is not connected to the inner circle of the rotor lamination. The inner end of the thirteenth magnetic isolation air gap 39 is connected to the twelfth magnetic isolation air gap 3. 8. The inner ends are not connected. The inner ends of the thirteenth magnetic air gap 39 and the twelfth magnetic air gap 38 are on the same straight line. Near the outer circle of the rotor lamination, and to the right of the fourteenth rectangular slot on the left side of the two fourteenth rectangular slots with an inverted "eight" shape, and to the left of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots with an inverted "eight" shape, a fifteenth rectangular slot penetrating the thickness of the rotor lamination is provided. The length of the fifteenth rectangular slot is less than the length of the fourteenth rectangular slot on the left side of the two fourteenth rectangular slots with an inverted "eight" shape. The outer edge of the fifteenth rectangular slot... The outer ends of the two fourteenth rectangular slots on the right side, which are shaped like an inverted "8", are not connected to the outer circle of the rotor lamination. A fourteenth magnetic air gap 40, penetrating the thickness of the rotor lamination, is provided at the inner end of the fifteenth rectangular slot. The outer end of the fourteenth magnetic air gap 40 is connected to the inner end of the fifteenth rectangular slot, and the width of the fourteenth magnetic air gap 40 is smaller than the width of the fifteenth rectangular slot. The inner end of the fourteenth magnetic air gap 40 is not connected to the twelfth magnetic air gap 38, nor to the right side of the two fourteenth rectangular slots on the left side, which are shaped like an inverted "8". Along the clockwise direction, to the left of the center line of the second S magnetic pole and near the outer circle of the rotor lamination, and to the right of the center line at an angle of 11.25° with the center line of the second S magnetic pole, there are two sixteenth rectangular slots with an inverted "V" shape, penetrating the thickness of the rotor lamination. The length of the sixteenth rectangular slot on the left is greater than the length of the sixteenth rectangular slot on the right. The outer ends of the sixteenth rectangular slots are not connected to the outer circle of the rotor lamination. The leftmost end of the sixteenth rectangular slot on the left is to the right of the center line at an angle of 11.25° with the left side of the center line of the second S magnetic pole, forming an inverted "V" shape. The rightmost end of the sixteenth rectangular slot on the right side of the two sixteenth rectangular slots in the inverted "V" shape is to the left of the center line of the second S magnetic pole. A fifteenth magnetic isolation gap 41, penetrating the thickness of the rotor lamination, is provided at the inner end of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "V" shape. The outer end of the fifteenth magnetic isolation gap 41 is connected to the inner end of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "V" shape, and the width of the fifteenth magnetic isolation gap 41 is smaller than the width of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "V" shape. The inner end of the fifteenth magnetic isolation gap 41 is not connected to the inner circle of the rotor lamination. A sixteenth magnetic isolation gap 41, penetrating the thickness of the rotor lamination, is provided at the inner end of the sixteenth rectangular slot on the right side of the two sixteenth rectangular slots in the inverted "V" shape. The sixteenth magnetic air gap 42 has its outer end connected to the inner end of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape. The width of the sixteenth magnetic air gap 42 is smaller than the width of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape. The inner end of the sixteenth magnetic air gap 42 is not connected to the inner circle of the rotor lamination. The inner end of the sixteenth magnetic air gap 42 is not connected to the inner end of the fifteenth magnetic air gap 41. The inner ends of the sixteenth magnetic air gap 42 and the fifteenth magnetic air gap 41 are on the same straight line. Near the outer circle of the rotor lamination, and to the right of the sixteenth rectangular slot to the left of the two sixteenth rectangular slots in an inverted "V" shape, and to the left of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots in an inverted "V" shape. A seventeenth rectangular slot, penetrating the thickness of the rotor lamination, is provided on the side. The length of the seventeenth rectangular slot is less than the length of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape. The outer end of the seventeenth rectangular slot is not connected to the outer circle of the rotor lamination or the outer end of the sixteenth rectangular slot to the left of the two sixteenth rectangular slots with an inverted "V" shape. A seventeenth magnetic isolation air gap 43, penetrating the thickness of the rotor lamination, is provided at the inner end of the seventeenth rectangular slot. The outer end of the seventeenth magnetic isolation air gap 43 is connected to the inner end of the seventeenth rectangular slot, and the width of the seventeenth magnetic isolation air gap 43 is less than the width of the seventeenth rectangular slot. The inner end of the seventeenth magnetic isolation air gap 43 is not connected to the sixteenth magnetic isolation air gap 42 or the left side of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape.An eighteenth rectangular slot, penetrating the thickness of the rotor lamination, is located near the outer circumference of the rotor lamination and to the right of the center line of the second S magnetic pole. The center line of the eighteenth rectangular slot along its length is parallel to the center line of the second S magnetic pole. The left end of the eighteenth rectangular slot is to the right of the center line of the second S magnetic pole. The upper end of the eighteenth rectangular slot is not connected to the outer circumference of the rotor lamination. A twenty-ninth rectangular slot, penetrating the thickness of the rotor lamination, is located at the lower end of the eighteenth rectangular slot. The upper end of the twenty-ninth rectangular slot is connected to the lower end of the eighteenth rectangular slot, and the length of the twenty-ninth rectangular slot is less than the width of the eighteenth rectangular slot. An eighteenth magnetic isolation air gap 44, penetrating the thickness of the rotor lamination, is located at the lower end of the twenty-ninth rectangular slot. The upper end of the eighteenth magnetic isolation air gap 44 is connected to the lower end of the twenty-ninth rectangular slot, and the length of the eighteenth magnetic isolation air gap 44 is greater than the length of the twenty-ninth rectangular slot. The lower end of the eighteenth magnetic isolation air gap 44 is not connected to the inner circumference of the rotor lamination. The left end of the eighteenth magnetic isolation air gap 44 is on the same straight line as the left end of the twenty-ninth rectangular slot. A nineteenth rectangular slot, penetrating the thickness of the rotor lamination, is provided on the outer circumference of the lamination, to the right of the eighteenth rectangular slot and to the left of the center line at an angle of 11.25° to the center line of the second S magnetic pole. The center line of the nineteenth rectangular slot along its length is parallel to the center line of the second S magnetic pole. The left end of the nineteenth rectangular slot is not connected to the right end of the eighteenth rectangular slot, and the right end of the nineteenth rectangular slot is to the left of the center line at an angle of 11.25° to the right of the center line of the second S magnetic pole. The upper end of the nineteenth rectangular slot is not connected to the outer circumference of the rotor lamination. A thirtieth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the lower end of the nineteenth rectangular slot. The upper end of the thirtieth rectangular slot is connected to the lower end of the nineteenth rectangular slot, and the length of the thirtieth rectangular slot is less than the width of the nineteenth rectangular slot. The lower end of the thirtieth rectangular slot is connected to the upper end of the eighteenth magnetic air gap 44, and the right end of the thirtieth rectangular slot is on the same straight line as the right end of the eighteenth magnetic air gap 44. The rotor laminations are stacked and welded with the burrs facing in one direction to form the rotor core 3. A first rectangular permanent magnet 11 with an N pole on its right end face is placed in the first rectangular slot; a second rectangular permanent magnet 12 with an N pole on its right end face is placed in the second rectangular slot; a third rectangular permanent magnet 4 with an N pole on its upper end face is placed in the third rectangular slot; a fourth rectangular permanent magnet 13 with an N pole on its left end face is placed in the fourth rectangular slot; a fifth rectangular permanent magnet 14 with an N pole on its upper end face is placed in the fifth rectangular slot; a sixth rectangular permanent magnet 15 with an N pole on its left end face is placed in the sixth rectangular slot; and a seventh rectangular permanent magnet 5 with an N pole on its upper end face is placed in the seventh rectangular slot, forming the first N pole of the permanent magnet rotor. An eighth rectangular permanent magnet 16 with an S pole on its right end face is placed in the eighth rectangular slot. The ninth rectangular permanent magnet 17, with an S pole polarity, is placed in the ninth rectangular slot. The tenth rectangular permanent magnet 18, with an S pole polarity on its right end face, is placed in the tenth rectangular slot. Two identical eleventh rectangular permanent magnets 10 are placed in the two eleventh rectangular slots on the rotor core 3 in an inverted "V" shape, with their opposite sides both having S pole polarities. The twelfth rectangular permanent magnet 9, with an S pole polarity on its upper end face, is placed in the twelfth rectangular slot. The thirteenth rectangular permanent magnet 19, with an S pole polarity on its left end face, is placed in the thirteenth rectangular slot, forming the first S pole of the permanent magnet rotor. The tile-shaped permanent magnet 20, with an N pole polarity on its inner arc surface, is placed in the tile-shaped slot. The fifteenth rectangular permanent magnet 19, with an N pole polarity on its left end face... 22 is placed in the fifteenth rectangular slot. Two fourteenth rectangular permanent magnets 21 of different lengths are placed in the rotor core 3 in two inverted "V" shaped slots, with the polarity of the opposite sides of the two fourteenth rectangular permanent magnets 21 both being N poles. The shorter fourteenth rectangular permanent magnet 21 is placed in the left fourteenth rectangular slot of the two inverted "V" shaped slots of the rotor core 3, and the longer fourteenth rectangular permanent magnet 21 is placed in the right fourteenth rectangular slot of the two inverted "V" shaped slots of the rotor core 3, forming the second N pole of the permanent magnet rotor. The seventeenth rectangular permanent magnet 24, with the S pole polarity on its right end face, is placed in the seventeenth rectangular slot. Two sixteenth rectangular permanent magnets 22 of different lengths are placed in the fourteenth rectangular slot. Two rectangular permanent magnet steels 23, each with an S-pole polarity on opposite sides, are placed in two inverted "V"-shaped sixteenth rectangular slots on the rotor core 3. The longer sixteenth rectangular permanent magnet steel 23 is placed in the left sixteenth rectangular slot, and the shorter sixteenth rectangular permanent magnet steel 23 is placed in the right sixteenth rectangular slot. An eighteenth rectangular permanent magnet steel 25 with an S-pole polarity on its right end face is placed in the eighteenth rectangular slot, and a nineteenth rectangular permanent magnet steel 26 with an S-pole polarity on its left end face is placed in the nineteenth rectangular slot, forming the second S-pole of the permanent magnet rotor, and so on.A permanent magnet rotor with an asymmetrical pole structure consisting of alternating N and S poles is formed, and the rotor core 3 is press-fitted onto the shaft 2.

Claims

1. A permanent magnet asymmetric pole drive motor with reduced torque pulsation, comprising a front cover (8), a rear cover (1), a housing (6), a rotor, and a stator (7), characterized in that: The permanent magnet rotor has an asymmetrical magnetic pole structure between poles; The permanent magnet rotor with asymmetrical pole structure includes a shaft (2), a rotor core (3), a first rectangular permanent magnet (11), a second rectangular permanent magnet (12), a third rectangular permanent magnet (4), a fourth rectangular permanent magnet (13), a fifth rectangular permanent magnet (14), a sixth rectangular permanent magnet (15), a seventh rectangular permanent magnet (5), an eighth rectangular permanent magnet (16), a ninth rectangular permanent magnet (17), a tenth rectangular permanent magnet (18), an eleventh rectangular permanent magnet (10), a twelfth rectangular permanent magnet (9), a thirteenth rectangular permanent magnet (19), a fourteenth rectangular permanent magnet (21), a fifteenth rectangular permanent magnet (22), a sixteenth rectangular permanent magnet (23), a seventeenth rectangular permanent magnet (24), and an eighteenth rectangular permanent magnet (25). Nineteenth rectangular permanent magnet (26), tile-shaped permanent magnet (20), first magnetic isolation air gap (27), second magnetic isolation air gap (28), third magnetic isolation air gap (29), fourth magnetic isolation air gap (30), fifth magnetic isolation air gap (31), sixth magnetic isolation air gap (32), seventh magnetic isolation air gap (33), eighth magnetic isolation air gap (34), ninth magnetic isolation air gap (35), tenth magnetic isolation air gap (36), eleventh magnetic isolation air gap (37), twelfth magnetic isolation air gap (38), thirteenth magnetic isolation air gap (39), fourteenth magnetic isolation air gap (40), fifteenth magnetic isolation air gap (41), sixteenth magnetic isolation air gap (42), seventeenth magnetic isolation air gap (43), eighteenth magnetic isolation air gap (44), near the outer circle of the rotor lamination and on the center line of the first N magnetic pole. On the left side, at an angle of 11.25° to the center line of the first N magnetic pole, there is a first rectangular slot penetrating the thickness of the rotor lamination. At the outer end of the first rectangular slot, there is a first arc-shaped magnetic air gap penetrating the thickness of the rotor lamination. The outer end of the first arc-shaped magnetic air gap is not connected to the outer circle of the rotor lamination. The inner end of the first arc-shaped magnetic air gap is connected to the outer end of the first rectangular slot, and the diameter of the arc-shaped magnetic air gap is greater than the width of the first rectangular slot. At the inner end of the first rectangular slot, there is a first magnetic air gap (27) penetrating the thickness of the rotor lamination. The outer end of the first magnetic air gap (27) is connected to the inner end of the first rectangular slot, and the width of the first magnetic air gap (27) is less than the width of the first rectangular slot. The inner end of the first magnetic air gap (27) is not connected to the inner circle of the rotor lamination. Near the outer circle of the rotor lamination... A second magnetic isolation air gap (28) penetrating the thickness of the rotor lamination is provided on the center line of the first N magnetic pole. The outer end of the second magnetic isolation air gap (28) is not connected to the outer circle of the rotor lamination. A second rectangular groove penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination, on the left side of the center line of the first N magnetic pole and on the right side of the first rectangular groove. The center line of the second rectangular groove in the length direction is parallel to the center line of the first N magnetic pole. The upper end of the second rectangular groove is not connected to the outer circle of the rotor lamination. A twentieth rectangular groove penetrating the thickness of the rotor lamination is provided at the lower end of the second rectangular groove. The upper end of the twentieth rectangular groove is connected to the lower end of the second rectangular groove, and the length of the twentieth rectangular groove is less than the width of the second rectangular groove. A third magnetic isolation air gap (29) penetrating the thickness of the rotor lamination in a tangential structure is provided at the lower end of the twentieth rectangular groove.The upper end of the third magnetic air gap (29) is connected to the lower end of the twentieth rectangular slot, and the length of the third magnetic air gap (29) is greater than the length of the twentieth rectangular slot. The left end of the third magnetic air gap (29) is on the same straight line as the left end of the twentieth rectangular slot. A twentieth rectangular slot penetrating the thickness of the rotor lamination is provided at the right end of the third magnetic air gap (29). The left end of the twentieth rectangular slot is connected to the right end of the third magnetic air gap (29), and the length of the twentieth rectangular slot is equal to the width of the third magnetic air gap (29). A third rectangular slot penetrating the thickness of the rotor lamination in a tangential structure is provided at the right end of the twentieth rectangular slot. The left end of the third rectangular slot is connected to the right end of the twentieth rectangular slot, and the width of the third rectangular slot is greater than the length of the twentieth rectangular slot. At the right end of the third rectangular slot and in the first N A 22nd rectangular slot, penetrating the thickness of the rotor lamination, is provided on the left side of the magnetic pole center line. The left end of the 22nd rectangular slot is connected to the right end of the 3rd rectangular slot, and the length of the 22nd rectangular slot is less than the width of the 3rd rectangular slot. The right end of the 22nd rectangular slot is connected to the second magnetic isolation gap (28). A fourth rectangular slot, penetrating the thickness of the rotor lamination, is provided near the outer circle of the rotor lamination and on the right side of the center line of the first N magnetic pole. A second arc-shaped magnetic isolation gap, penetrating the thickness of the rotor lamination, is provided at the outer end of the fourth rectangular slot. The outer end of the second arc-shaped magnetic isolation gap is not connected to the outer circle of the rotor lamination. The inner end of the second arc-shaped magnetic isolation gap is connected to the outer end of the fourth rectangular slot, and the diameter of the circle of the second arc-shaped magnetic isolation gap is greater than the width of the fourth rectangular slot. A fourth rectangular slot, located on the right side of the center line of the first N magnetic pole, is provided at the inner end of the fourth rectangular slot. A 23rd rectangular slot penetrates the thickness of the rotor lamination. The upper end of the 23rd rectangular slot is connected to the inner end of the 4th rectangular slot, and the length of the 23rd rectangular slot is less than the width of the 4th rectangular slot. The lower end of the 23rd rectangular slot is connected to the second magnetic isolation air gap (28). A 24th rectangular slot penetrates the thickness of the rotor lamination and is located inside the second magnetic isolation air gap (28) and to the right of the center line of the first N magnetic pole. The lower end of the 24th rectangular slot is on the same straight line as the lowest end of the inner end of the second magnetic isolation air gap (28). The left end of the 24th rectangular slot is connected to the second magnetic isolation air gap (28), and the length of the 24th rectangular slot is less than the length of the second magnetic isolation air gap (28). A 5th rectangular slot with a tangential structure penetrates the thickness of the rotor lamination and is located at the right end of the 24th rectangular slot. The left end of the 5th rectangular slot is connected to the second magnetic isolation air gap (28). The right end of the 24th rectangular slot is connected, and the width of the 5th rectangular slot is greater than the length of the 24th rectangular slot. A fourth magnetic isolation air gap (30) penetrating the thickness of the rotor lamination is provided at the right end of the 5th rectangular slot. The lower end of the fourth magnetic isolation air gap (30) is on the same straight line as the lowest end of the inner end of the second magnetic isolation air gap (28). The left end of the fourth magnetic isolation air gap (30) is connected to the right end of the 5th rectangular slot, and the width of the fourth magnetic isolation air gap (30) is less than the width of the 5th rectangular slot. Near the outer circle of the rotor lamination, on the right side of the center line of the first N magnetic pole and on the left side of the center line with an angle of 11.25° with the center line of the first N magnetic pole, a sixth rectangular slot penetrating the thickness of the rotor lamination is provided. The rightmost end of the sixth rectangular slot is on the left side of the center line with an angle of 11.25° with the right side of the center line of the first N magnetic pole.The outer end of the sixth rectangular slot is not connected to the outer circle of the rotor lamination, and the inner end of the sixth rectangular slot is connected to the right end of the fourth magnetic isolation gap (30). The width of the sixth rectangular slot is greater than the width of the fourth magnetic isolation gap (30). Near the outer circle of the rotor lamination, on the right side of the fourth rectangular slot and the left side of the sixth rectangular slot, a fifth magnetic isolation gap (31) penetrating the thickness of the rotor lamination is provided. The upper end of the fifth magnetic isolation gap (31) is not connected to the outer circle of the rotor lamination, the outer end of the fourth rectangular slot, or the outer end of the sixth rectangular slot. The lower end of the fifth magnetic isolation gap (31) is connected to the upper end of the fourth magnetic isolation gap (30). Near the inner circle of the rotor lamination and on the center line of the first N magnetic pole, a sixth magnetic isolation gap (32) penetrating the thickness of the rotor lamination is provided. The outer end of the sixth magnetic isolation gap (32) is not connected to the inner end of the second magnetic isolation gap (28). The inner end of the sixth magnetic isolation gap (32) is connected to the rotor lamination. The inner circles of the sub-laminated laminations are not connected. A twenty-fifth rectangular slot, penetrating the thickness of the rotor lamination, is provided at the left end of the sixth magnetic air gap (32). The upper end of the twenty-fifth rectangular slot is on the same straight line as the outer end of the sixth magnetic air gap (32). The right end of the twenty-fifth rectangular slot is connected to the sixth magnetic air gap (32), and the length of the twenty-fifth rectangular slot is less than the length of the sixth magnetic air gap (32). A seventh rectangular slot, tangentially penetrating the thickness of the rotor lamination, is provided at the left end of the twenty-fifth rectangular slot. The upper end of the seventh rectangular slot is not connected to the lower end of the third rectangular slot. The right end of the seventh rectangular slot is connected to the left end of the twenty-fifth rectangular slot, and the width of the seventh rectangular slot is greater than the length of the twenty-fifth rectangular slot. The left end of the seventh rectangular slot is not connected to the first magnetic air gap (27). The lower end of the seventh rectangular slot is on the same straight line as the lowest end of the inner end of the first magnetic air gap (27). Along the clockwise direction, a seventh magnetic isolation gap (33) penetrating the thickness of the rotor lamination is provided on the center line of the adjacent first S magnetic pole and near the outer circle of the rotor lamination. The outer end of the seventh magnetic isolation gap (33) is not connected to the outer circle of the rotor lamination. Near the outer circle of the rotor lamination and to the left of the center line of the first S magnetic pole, an eighth rectangular slot penetrating the thickness of the rotor lamination is provided. At the outer end of the eighth rectangular slot, a third arc-shaped magnetic isolation gap penetrating the thickness of the rotor lamination is provided. The outer end of the third arc-shaped magnetic isolation gap is not connected to the outer circle of the rotor lamination. The inner end of the third arc-shaped magnetic isolation gap is connected to the outer end of the eighth rectangular slot, and the diameter of the circle of the third arc-shaped magnetic isolation gap is larger than the width of the eighth rectangular slot. At the inner end of the eighth rectangular slot and to the left of the center line of the first S magnetic pole, a penetrating rotor lamination is provided. The 26th rectangular slot is formed by the thickness of the lamination. The upper end of the 26th rectangular slot is connected to the inner end of the 8th rectangular slot, and the length of the 26th rectangular slot is less than the width of the 8th rectangular slot. The lower end of the 26th rectangular slot is connected to the 7th magnetic air gap (33). A 27th rectangular slot is provided at the inner end of the 7th magnetic air gap (33) and to the left of the center line of the first S magnetic pole. The lower end of the 27th rectangular slot is on the same straight line as the lowest end of the inner end of the 7th magnetic air gap (33). The right end of the 27th rectangular slot is connected to the 7th magnetic air gap (33), and the length of the 27th rectangular slot is less than the length of the 7th magnetic air gap (33). A 9th rectangular slot with a tangential structure is provided at the left end of the 27th rectangular slot, which penetrates the thickness of the rotor lamination. The right end of the rectangular slot is connected to the left end of the twenty-seventh rectangular slot, and the width of the ninth rectangular slot is greater than the length of the twenty-seventh rectangular slot. An eighth magnetic air gap (34) penetrating the thickness of the rotor lamination is provided at the left end of the ninth rectangular slot. The lower end of the eighth magnetic air gap (34) is on the same straight line as the lowest end of the inner end of the seventh magnetic air gap (33). The right end of the eighth magnetic air gap (34) is connected to the left end of the ninth rectangular slot, and the width of the eighth magnetic air gap (34) is less than the width of the ninth rectangular slot. A tenth rectangular slot penetrating the thickness of the rotor lamination is provided near the outer circle of the rotor lamination, to the left of the center line of the first S magnetic pole, and to the right of the center line with an angle of 11.25° with the center line of the first S magnetic pole. The leftmost end of the tenth rectangular slot is to the left of the center line of the first S magnetic pole. On the right side of the center line with a side angle of 11.25°, the outer end of the tenth rectangular slot is not connected to the outer circle of the rotor lamination, the inner end of the tenth rectangular slot is connected to the left end of the eighth magnetic air gap (34), and the width of the tenth rectangular slot is greater than the width of the eighth magnetic air gap (34). Near the outer circle of the rotor lamination, on the left side of the eighth rectangular slot and the right side of the tenth rectangular slot, there is a ninth magnetic air gap (35) that penetrates the thickness of the rotor lamination. The upper end of the ninth magnetic air gap (35) is not connected to the outer circle of the rotor lamination, the outer end of the eighth rectangular slot, or the outer end of the tenth rectangular slot. The lower end of the ninth magnetic air gap (35) is connected to the upper end of the eighth magnetic air gap (34). Near the outer circle of the rotor lamination, on the right side of the center line of the first S magnetic pole, and at an angle of 11° with the center line of the first S magnetic pole.Two eleventh rectangular slots with an inverted "V" shape are provided on the left side of the 25° center line, penetrating the thickness of the rotor lamination. The leftmost end of the eleventh rectangular slot on the left side of the two eleventh rectangular slots with an inverted "V" shape is not connected to the right end of the seventh magnetic gap (33). The outer ends of the two eleventh rectangular slots with an inverted "V" shape are not connected to the outer circle of the rotor lamination. The inner ends of the two eleventh rectangular slots with an inverted "V" shape are not connected. Near the outer circle of the rotor lamination and on the right side of the center line of the first S magnetic pole, and on the center line with an angle of 11.25° with the center line of the first S magnetic pole, a... There is a thirteenth rectangular slot that penetrates the thickness of the rotor lamination. At the outer end of the thirteenth rectangular slot, there is a fourth arc-shaped magnetic air gap that penetrates the thickness of the rotor lamination. The outer end of the fourth arc-shaped magnetic air gap is not connected to the outer circle of the rotor lamination. The inner end of the fourth arc-shaped magnetic air gap is connected to the outer end of the thirteenth rectangular slot, and the diameter of the circle of the fourth arc-shaped magnetic air gap is greater than the width of the thirteenth rectangular slot. At the inner end of the thirteenth rectangular slot, there is an eleventh magnetic air gap (37) that penetrates the thickness of the rotor lamination. The outer end of the eleventh magnetic air gap (37) is connected to the inner end of the thirteenth rectangular slot, and the width of the eleventh magnetic air gap (37) is greater than the width of the thirteenth rectangular slot. The width is less than that of the thirteenth rectangular slot. The inner end of the eleventh magnetic air gap (37) is not connected to the inner circle of the rotor lamination. Near the inner circle of the rotor lamination and on the center line of the first S magnetic pole, there is a tenth magnetic air gap (36) that penetrates the thickness of the rotor lamination. The outer end of the tenth magnetic air gap (36) is not connected to the inner end of the seventh magnetic air gap (33). The inner end of the tenth magnetic air gap (36) is not connected to the inner circle of the rotor lamination. At the right end of the tenth magnetic air gap (36), there is a twenty-eighth rectangular slot that penetrates the thickness of the rotor lamination. The upper end of the twenty-eighth rectangular slot is at the same level as the outer end of the tenth magnetic air gap (36). On a straight line, the left end of the twenty-eighth rectangular slot is connected to the tenth magnetic air gap (36), and the length of the twenty-eighth rectangular slot is less than the length of the tenth magnetic air gap (36). At the right end of the twenty-eighth rectangular slot, there is a twelfth rectangular slot with a tangential structure that penetrates the thickness of the rotor lamination. The left end of the twelfth rectangular slot is connected to the right end of the twenty-eighth rectangular slot, and the width of the twelfth rectangular slot is greater than the length of the twenty-eighth rectangular slot. The right end of the twelfth rectangular slot is not connected to the eleventh magnetic air gap (37). The lower end of the twelfth rectangular slot is on the same straight line as the lowest end of the inner end of the eleventh magnetic air gap (37). Along the clockwise direction, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the right of the thirteenth rectangular slot, there is a tile-shaped slot that penetrates the thickness of the rotor lamination. The inner arc surface of the tile-shaped slot faces the outer circle of the rotor lamination. The outer end of the tile-shaped slot is not connected to the outer circle of the rotor lamination, and the inner end of the tile-shaped slot is not connected to the inner circle of the rotor lamination. At the rightmost end of the tile-shaped slot, to the left of the center line of the second N magnetic pole and near the outer circle of the rotor lamination, and to the left of the center line at an angle of 11.25° with the center line of the second N magnetic pole, there are two inverted "V" shaped slots that penetrate the thickness of the rotor lamination. The fourteenth rectangular slot, which has an inverted "V" shape, has a length that is shorter than that of the fourteenth rectangular slot on the left. The outer ends of the two fourteenth rectangular slots with the inverted "V" shape are not connected to the outer circle of the rotor lamination. The leftmost end of the fourteenth rectangular slot on the left is to the right of the center line of the second N magnetic pole, and the rightmost end of the fourteenth rectangular slot on the right has an angle of 11° with the right side of the center line of the second N magnetic pole.To the left of the 25° centerline, on the left side of the fourteenth rectangular slot in the shape of an inverted "8", there is a twelfth magnetic air gap (38) that penetrates the thickness of the rotor lamination. The outer end of the twelfth magnetic air gap (38) is connected to the inner end of the fourteenth rectangular slot on the left side of the two fourteenth rectangular slots in the shape of an inverted "8", and the width of the twelfth magnetic air gap (38) is smaller than the width of the fourteenth rectangular slot on the left side of the two fourteenth rectangular slots in the shape of an inverted "8". The inner end of the twelfth magnetic air gap (38) is not connected to the inner circle of the rotor lamination. The inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the "V" shape is provided with a thirteenth magnetic isolation air gap (39) that penetrates the thickness of the rotor lamination. The outer end of the thirteenth magnetic isolation air gap (39) is connected to the inner end of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "V" shape, and the width of the thirteenth magnetic isolation air gap (39) is smaller than the width of the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots in the inverted "V" shape. The inner end of the thirteenth magnetic isolation air gap (39) is not connected to the inner circle of the rotor lamination. The inner end of the thirteenth magnetic isolation air gap (39) is connected to the twelfth magnetic isolation air gap. (38) The inner ends are not connected. The inner end of the thirteenth magnetic gap (39) and the inner end of the twelfth magnetic gap (38) are on the same straight line. Near the outer circle of the rotor lamination, on the right side of the fourteenth rectangular slot to the left of the two fourteenth rectangular slots with an inverted "eight" shape, and on the left side of the fourteenth rectangular slot to the right of the two fourteenth rectangular slots with an inverted "eight" shape, there is a fifteenth rectangular slot that penetrates the thickness of the rotor lamination. The length of the fifteenth rectangular slot is less than the length of the fourteenth rectangular slot to the left of the two fourteenth rectangular slots with an inverted "eight" shape. The outer end of the fifteenth rectangular slot The outer ends of the two fourteenth rectangular slots on the right side, which are in an inverted "V" shape, are not connected to the outer circle of the rotor lamination. A fourteenth magnetic air gap (40) penetrating the thickness of the rotor lamination is provided at the inner end of the fifteenth rectangular slot. The outer end of the fourteenth magnetic air gap (40) is connected to the inner end of the fifteenth rectangular slot, and the width of the fourteenth magnetic air gap (40) is smaller than the width of the fifteenth rectangular slot. The inner end of the fourteenth magnetic air gap (40) is not connected to the twelfth magnetic air gap (38) or the right side of the two fourteenth rectangular slots on the left side, which are in an inverted "V" shape. Along the clockwise direction, to the left of the center line of the second S magnetic pole and near the outer circle of the rotor lamination, and to the right of the center line at an angle of 11.25° with the center line of the second S magnetic pole, there are two sixteenth rectangular slots with an inverted "V" shape, penetrating the thickness of the rotor lamination. The length of the sixteenth rectangular slot on the left is greater than the length of the sixteenth rectangular slot on the right. The outer ends of the sixteenth rectangular slots are not connected to the outer circle of the rotor lamination. The leftmost end of the sixteenth rectangular slot on the left is to the right of the center line at an angle of 11.25° with the left side of the center line of the second S magnetic pole. The rightmost end of the sixteenth rectangular slot on the right side of the two sixteenth rectangular slots in the inverted "eight" shape is to the left of the center line of the second S magnetic pole. A fifteenth magnetic gap (41) penetrating the thickness of the rotor lamination is provided at the inner end of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "eight" shape. The outer end of the fifteenth magnetic gap (41) is connected to the inner end of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "eight" shape, and the width of the fifteenth magnetic gap (41) is smaller than the width of the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots in the inverted "eight" shape. The inner end of the fifteenth magnetic gap (41) is not connected to the inner circle of the rotor lamination. The sixteenth rectangular slot on the right side of the two sixteenth rectangular slots in the inverted "eight" shape... The inner end of the groove is provided with a sixteenth magnetic air gap (42) that penetrates the thickness of the rotor lamination. The outer end of the sixteenth magnetic air gap (42) is connected to the inner end of the sixteenth rectangular groove on the right side of the two sixteenth rectangular grooves with an inverted "eight" shape. The width of the sixteenth magnetic air gap (42) is smaller than the width of the sixteenth rectangular groove on the right side of the two sixteenth rectangular grooves with an inverted "eight" shape. The inner end of the sixteenth magnetic air gap (42) is not connected to the inner circle of the rotor lamination. The inner end of the sixteenth magnetic air gap (42) is not connected to the inner end of the fifteenth magnetic air gap (41). The inner end of the sixteenth magnetic air gap (42) and the inner end of the fifteenth magnetic air gap (41) are on the same straight line. Near the outer circle of the rotor lamination and in the two sixteenth rectangular grooves with an inverted "eight" shape... A seventeenth rectangular slot, penetrating the thickness of the rotor lamination, is provided to the right of the sixteenth rectangular slot to the left of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape. The length of the seventeenth rectangular slot is less than the length of the sixteenth rectangular slot to the right of the two sixteenth rectangular slots with an inverted "V" shape. The outer end of the seventeenth rectangular slot is not connected to the outer circle of the rotor lamination or the outer end of the sixteenth rectangular slot to the left of the two sixteenth rectangular slots with an inverted "V" shape. A seventeenth magnetic air gap (43), penetrating the thickness of the rotor lamination, is provided at the inner end of the seventeenth rectangular slot. The outer end of the seventeenth magnetic air gap (43) is connected to the inner end of the seventeenth rectangular slot, and the width of the seventeenth magnetic air gap (43) is less than the width of the seventeenth rectangular slot.The inner end of the seventeenth magnetic gap (43) is not connected to the sixteenth magnetic gap (42) or the left side of the two sixteenth rectangular slots on the right side of the inverted "V" shaped structure. Near the outer circle of the rotor lamination and to the right of the center line of the second S magnetic pole, there is an eighteenth rectangular slot that penetrates the thickness of the rotor lamination. The center line of the eighteenth rectangular slot in the length direction is parallel to the center line of the second S magnetic pole. The left end of the eighteenth rectangular slot is to the right of the center line of the second S magnetic pole. The upper end of the eighteenth rectangular slot is not connected to the outer circle of the rotor lamination. The lower end of the eighteenth rectangular slot... A twenty-ninth rectangular slot is provided, penetrating the thickness of the rotor lamination. The upper end of the twenty-ninth rectangular slot is connected to the lower end of the eighteenth rectangular slot, and the length of the twenty-ninth rectangular slot is less than the width of the eighteenth rectangular slot. At the lower end of the twenty-ninth rectangular slot, an eighteenth magnetic air gap (44) penetrating the thickness of the rotor lamination is provided. The upper end of the eighteenth magnetic air gap (44) is connected to the lower end of the twenty-ninth rectangular slot, and the length of the eighteenth magnetic air gap (44) is greater than the length of the twenty-ninth rectangular slot. The lower end of the eighteenth magnetic air gap (44) is not connected to the inner circle of the rotor lamination. The left end of the magnetic gap (44) is on the same straight line as the left end of the twenty-ninth rectangular slot. Near the outer circle of the rotor lamination, to the right of the eighteenth rectangular slot and to the left of the center line at an angle of 11.25° to the center line of the second S magnetic pole, a nineteenth rectangular slot is provided, penetrating the thickness of the rotor lamination. The center line of the nineteenth rectangular slot along its length is parallel to the center line of the second S magnetic pole. The left end of the nineteenth rectangular slot is not connected to the right end of the eighteenth rectangular slot. The right end of the nineteenth rectangular slot is to the left of the center line at an angle of 11.25° to the right of the center line of the second S magnetic pole. The upper end of the nineteenth rectangular slot is not connected to the outer circle of the rotor lamination. A thirtieth rectangular slot is provided at the lower end of the nineteenth rectangular slot, penetrating the thickness of the rotor lamination. The upper end of the thirtieth rectangular slot is connected to the lower end of the nineteenth rectangular slot, and the length of the thirtieth rectangular slot is less than the width of the nineteenth rectangular slot. The lower end of the thirtieth rectangular slot is connected to the upper end of the eighteenth magnetic air gap (44). The right end of the thirtieth rectangular slot is on the same straight line as the right end of the eighteenth magnetic air gap (44). The rotor laminations are stacked and welded with the burrs facing in one direction to form the rotor core (3). The first rectangular permanent magnet (11) with the N pole on its right end face is placed in the first rectangular slot. The second rectangular permanent magnet (12) with the N pole on its right end face is placed in the second rectangular slot. The third rectangular permanent magnet (4) with the N pole on its upper end face is placed in the third rectangular slot. The fourth rectangular permanent magnet (13) with the N pole on its left end face is placed in the fourth rectangular slot. The fifth rectangular permanent magnet (14) with the N pole on its upper end face is placed in the fifth rectangular slot. The sixth rectangular permanent magnet (15) with the N pole on its left end face is placed in the sixth rectangular slot. The seventh rectangular permanent magnet (5) with the N pole on its upper end face is placed in the seventh rectangular slot, forming the first N pole of the permanent magnet rotor. The eighth rectangular permanent magnet (15) with the S pole on its right end face is placed in the seventh rectangular slot. Steel (16) is placed in the eighth rectangular slot. The ninth rectangular permanent magnet steel (17) with the upper end face polarity of S is placed in the ninth rectangular slot. The tenth rectangular permanent magnet steel (18) with the right end face polarity of S is placed in the tenth rectangular slot. Two identical eleventh rectangular permanent magnet steels (10) are placed in the two eleventh rectangular slots on the rotor core (3) in an inverted "V" shape, with the opposite sides of the two eleventh rectangular permanent magnet steels (10) having the opposite side polarity of S. The twelfth rectangular permanent magnet steel (9) with the upper end face polarity of S is placed in the twelfth rectangular slot. The thirteenth rectangular permanent magnet steel (19) with the left end face polarity of S is placed in the thirteenth rectangular slot, forming the first S magnetic pole of the permanent magnet rotor. The inner arc surface polarity is... The N-pole tile-shaped permanent magnet (20) is placed in the tile-shaped slot. The fifteenth rectangular permanent magnet (22), whose left end face polarity is N, is placed in the fifteenth rectangular slot. Two fourteenth rectangular permanent magnets (21) of different lengths are placed in the two fourteenth rectangular slots of the rotor core (3) in an inverted "V" shape, with the polarity of the opposite sides of the two fourteenth rectangular permanent magnets (21) both being N poles. The shorter fourteenth rectangular permanent magnet (21) is placed in the fourteenth rectangular slot on the left side of the two fourteenth rectangular slots of the rotor core (3), and the longer fourteenth rectangular permanent magnet (21) is placed in the fourteenth rectangular slot on the right side of the two fourteenth rectangular slots of the rotor core (3). The second N pole of the permanent magnet rotor is formed in the rectangular slot. The seventeenth rectangular permanent magnet (24) with the S pole polarity on the right end face is placed in the seventeenth rectangular slot. Two sixteenth rectangular permanent magnets (23) of different lengths are placed in the two sixteenth rectangular slots of the rotor core (3) in an inverted "V" shape, with the opposite sides of the two sixteenth rectangular permanent magnets (23) having the S pole polarity on both sides. The longer sixteenth rectangular permanent magnet (23) is placed in the sixteenth rectangular slot on the left side of the two sixteenth rectangular slots of the rotor core (3), and the shorter sixteenth rectangular permanent magnet (23) is placed in the sixteenth rectangular slot on the right side of the two sixteenth rectangular slots of the rotor core (3).The eighteenth rectangular permanent magnet (25) with the S pole on its right end face is placed in the eighteenth rectangular slot, and the nineteenth rectangular permanent magnet (26) with the S pole on its left end face is placed in the nineteenth rectangular slot, forming the second S pole of the permanent magnet rotor. This process is repeated to form a permanent magnet rotor with an asymmetrical pole structure where N and S poles are arranged alternately. The rotor core (3) is press-fitted onto the shaft (2).

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