Busbar connection for permanent magnet synchronous motors

Abstract

The invention relates to the technical field of synchronous motors, and discloses a busbar-connected permanent magnet synchronous motor, comprising a motor stator, a busbar and a connection module, wherein the motor stator has a circular ring-shaped cross section and is arranged in the motor, and the inner side is used to place the motor rotor, and a stator winding is arranged in the motor stator, wherein the stator winding is a winding coil, wherein two coils with different diameters are arranged in the stator winding, and the two coils are evenly arrayed along the circumference of the motor stator, and when the coils with different diameters work alone, the motor can generate different rated powers to drive the rotor to move, and the busbar is arrayed with connection end pins, and the ends of different stator windings are connected to different connection end pins, and the other end of the connection end pin is connected to the connection module, and the connection module is provided with a power interface connected to a power end, and the connection module can control the power to flow into different connection end pins in the busbar, so as to realize the power on and off of the coils with different diameters in the stator winding.

Description

Technical Field

[0001] The present invention relates to the technical field of synchronous motors, in particular to a busbar-connected permanent magnet synchronous motor. Background Art

[0002] The permanent magnet synchronous motor is mainly composed of components such as the stator, rotor and end cover. The stator is basically the same as the ordinary induction motor. It adopts a laminated structure to reduce the iron loss of the motor during operation. It is equipped with a three-phase AC winding, called the armature. The rotor can be made in a solid form or pressed by laminated sheets, on which permanent magnet materials are installed. The working principle of the permanent magnet synchronous motor is based on electromagnetic induction and electromagnetic force. When the stator winding of the motor is connected to three-phase AC, a rotating magnetic field will be generated. This rotating magnetic field interacts with the magnetic field generated by the permanent magnet on the rotor to generate electromagnetic force, causing the rotor to rotate. Since the speed of the rotor is the same as the speed of the rotating magnetic field, it is called a synchronous motor. The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, high efficiency, high power density, low noise, and easy maintenance. Its high efficiency is mainly due to its precise current control and good matching between the magnetic field and the current. In addition, the permanent magnet synchronous motor also has good dynamic response performance and can quickly adapt to load changes.

[0003] The rated power of a motor refers to the maximum power that the motor can continuously and stably output under specific working conditions (such as rated voltage, rated current, rated frequency and rated load, etc.). This is a standard value determined during the design and manufacture of the motor, and is used to guide the use and selection of the motor. The speed regulation range of the permanent magnet synchronous motor is limited by its weak magnetic field capability. In constant power mode, when the motor needs to run at a higher speed, it may be necessary to reduce the magnetic field strength through weak magnetic field control, but the weak magnetic field capability is limited, which may lead to a limited speed regulation range. As a result, the efficiency of the permanent magnet synchronous motor may be different at different speeds, especially when the motor runs at low or high speed extremes, the efficiency may be reduced, and the optimal rated power of the motor is also different under different speed conditions. Summary of the invention

[0004] (I) Technical problems solved: In view of the deficiencies in the prior art, the present invention provides a bus-connected permanent magnet synchronous motor, which has the advantage of having different powers in different working stages of the motor, thereby solving the problem of different powers of the motor under two different speed conditions.

[0005] (ii) Technical solution: To achieve the above-mentioned purpose of having different powers in different working stages of the motor, the present invention provides the following technical solution: a busbar connected permanent magnet synchronous motor, including a motor stator, a busbar and a connection module, the motor stator has a circular ring cross-section and is arranged in the motor, the inner side is used to place the motor rotor, a stator winding is provided in the motor stator, the stator winding is a winding coil, the stator winding is provided with two coils of different diameters, and the two coils are evenly arrayed along the circumference of the motor stator, and when the coils of different diameters work alone, the motor can generate different rated powers to drive the rotor to move, the busbar is arrayed with connection end pins, different ends of the stator windings are connected to different connection end pins, the other end of the connection end pin is connected to the connection module, the connection module is provided with a power interface connected to the power end, the connection module can control the power to flow into different connection end pins of the busbar, so as to realize the power on and off of the coils of different diameters in the stator winding.

[0006] Preferably, the connecting module is composed of a base and a rotating cover plate, and is in a circular ring shape. The base is provided with a track for the rotating cover plate to rotate. The rotating cover plate is arranged above the base, and the base is fixed. The base has a first power-on interface and a second power-on interface in a circular array. The first power-on interface and the second power-on interface are respectively connected to the power interface and the connecting end pin. A first power-on interface and a second power-on interface form a power-on group, and a gap is provided between each group of the first power-on interface and the second power-on interface. A power-on end pin is provided on the lower side of the rotating cover plate. When the power-on end pin rotates between the first power-on interface and the second power-on interface, conduction is achieved through contact, and the power supply current is guided to the stator winding. At the same time, the power-on groups of coils with the same diameter are controlled to be spaced apart. A driving module is provided above the connecting module, and the driving module can control the rotating cover plate to rotate.

[0007] Preferably, the first power-on interface and the second power-on interface are arc-shaped plates.

[0008] Preferably, there are 8 power-on groups and 4 power-on terminal pins.

[0009] Preferably, there are 8 power-carrying groups and 8 power-carrying end pins, and the rotating cover has three working states during the rotation process, which are; Preferably, the power-carrying end pins are in contact and connected with the 4 power-carrying groups that control the large-diameter coil.

[0010] Preferably, the energized end pins are in contact and communication with four energized groups that control the small diameter coils.

[0011] Preferably, the energized end pin is in contact and communication with 8 energized groups at the same time.

[0012] Preferably, the angle of the arc plate in the first power supply interface and the second power supply interface is 25 degrees to 35 degrees.

[0013] Preferably, an elastic component is provided on the non-contact side of the first power-on interface and the second power-on interface with the power-on end pin, and the elastic component generates thrust on the first power-on interface and the second power-on interface.

[0014] Preferably, the driving module is driven by a small motor and is fixedly connected to the rotating cover plate. When the driving module is driven to rotate by the small motor, the rotating cover plate rotates along with the driving module.

[0015] (III) Beneficial effects: Compared with the prior art, the present invention provides a bus-connected permanent magnet synchronous motor, which has the following beneficial effects: 1. The bus-connected permanent magnet synchronous motor divides the stator winding in the motor stator into two groups of coils with different diameters. The thick coil can generate a larger magnetic field under the same current, thereby providing a larger torque. In the motor starting stage, the stator winding with fewer turns and thicker wire diameter is selected to be energized through the connection module, which can effectively overcome static friction and inertia and improve the starting performance of the motor. The diameter of the coil is directly proportional to the rated power of the motor. The thick coil can carry a larger power. In the starting stage of the automobile motor, a large amount of energy needs to be provided in a short time. The thick coil design can more effectively utilize the rated power, so that the vehicle can quickly reach the required starting speed. In the stable operation stage of the motor, the connection module is switched to the stator winding with a small coil diameter and a large number of turns, which can reduce resistance and electricity. Flow, reduce heat, improve efficiency, small diameter coil has smaller resistance and less heat, which helps the motor maintain stable performance under long-term and high-load conditions. The connection module can flexibly control the power supply of different stator windings through the first power supply interface and the second power supply interface arranged in groups. The design of the rotating cover allows the user to change the energized stator winding by rotation, thereby achieving flexible control of the motor working state. This design enables the motor to adapt to different working conditions and maintain excellent performance during startup, stable operation and high-speed operation. By optimizing the power supply of the stator winding, the heat loss of the motor can also be reduced, and the reliability and service life of the motor can be improved. Compared with traditional motors, this motor is equivalent to a combination of two motors of different powers. When there are two working scenarios with extreme speeds, they can be switched to improve work efficiency and reduce the loss of the motor itself.

[0016] 2. The busbar is connected to the permanent magnet synchronous motor. By changing the rotation angle of the rotating cover plate, it can flexibly switch between three working states: the large diameter coil works alone, the small diameter coil works alone, and the large and small diameter coils work at the same time. This design enables the motor to quickly adjust the working state according to actual needs, improving the flexibility and controllability of the motor. The first power-on interface and the second power-on interface designed by the arc plate, combined with the rotating contact of the power-on end pin, can achieve precise control of current distribution. By adjusting the position of the rotating cover plate, it is possible to accurately control which power-on groups (i.e., which coils) are connected, thereby achieving fine adjustment of the motor performance. Under different working conditions, the motor requires different performance outputs. For example, a larger current is required during the startup phase. Torque, while in the stable operation stage, higher efficiency and lower heat generation are required. By selecting large-diameter coils or small-diameter coils to work alone or simultaneously, the performance output of the motor can be optimized to better adapt to different working conditions. In the stable operation stage, by selecting small-diameter coils to work, the resistance and loss can be reduced, and the energy efficiency of the motor can be improved. In situations where a larger torque is required, by selecting large-diameter coils to work, the rated power can be more effectively utilized and the output capacity of the motor can be improved. The contact between the first power-on interface 311 and the second power-on interface 312 designed by the rotating cover plate and the arc plate is a sliding contact. Compared with the traditional plug-in connection, this design reduces mechanical wear and plug-in times, and improves the reliability and durability of the connection.

[0017] 3. The bus is connected to a permanent magnet synchronous motor, and a thrust is generated on the first power-on interface and the second power-on interface through an elastic component, so that these interfaces can maintain close contact with the power-on end pins. This close contact helps to reduce the occurrence of poor contact and ensure that the current can pass smoothly, thereby avoiding a decrease in motor power. Under different working environments and temperatures, the thermal expansion and contraction of the material may cause the gap between the interfaces to change. The thrust of the elastic component can automatically adjust the gap between the interfaces so that they always maintain close contact, thereby improving the stability and reliability of the motor in different working environments. The drive module is driven by a small motor and fixedly connected to the rotating cover plate 32. By accurately controlling the rotation angle and speed of the small motor, the rotation angle and speed of the rotating cover plate 32 can be accurately controlled. This precise control helps to achieve rapid switching of the motor between different working states, thereby improving the control accuracy and response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the connection module and the driving module of the present invention.

[0020] Figure 3It is a schematic cross-sectional view of the connection module of the present invention.

[0021] Figure 4 The base structure of the first embodiment of the present invention is shown in FIG. Figure 1 .

[0022] Figure 5 The base structure of the first embodiment of the present invention is shown in FIG. Figure 2 .

[0023] Figure 6 The base structure of the second embodiment of the present invention is shown in FIG. Figure 1 .

[0024] Figure 7 The base structure of the second embodiment of the present invention is shown in FIG. Figure 2 .

[0025] Figure 8 Schematic diagram of the contact of the power-on terminal pins in the second embodiment of the present invention Figure 1 .

[0026] Fig. 9 Schematic diagram of the contact of the power-on terminal pins in the second embodiment of the present invention Figure 2 .

[0027] Fig.10 Schematic diagram of the contact of the power-on terminal pins in the second embodiment of the present invention Figure 3 .

[0028] In the figure: 1. Motor stator; 2. Bus; 3. Connection module; 4. Drive module; 11. Stator winding; 21. Connection terminal; 31. Base; 32. Rotating cover; 301. Power interface; 311. First power interface; 312. Second power interface; 313. Elastic component; 321. Power terminal. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1-Figure 3, a busbar connects a permanent magnet synchronous motor, including a motor stator 1, a busbar 2 and a connection module 3. The motor stator 1 has a circular ring-shaped cross-section and is arranged in the motor, and the inner side is used to place the motor rotor. A stator winding 11 is provided in the motor stator 1. The stator winding 11 is a winding coil. Two coils with different diameters are provided in the stator winding 11, and the two coils are evenly arrayed along the circumference of the motor stator 1. When the coils with different diameters work alone, the motor can generate different rated powers to drive the rotor to move. The busbar 2 is arrayed with connection end pins 21, and different ends of the stator windings 11 are connected to different connection end pins 21. The other end of the connection end pin 21 is connected to the connection module 3. The connection module 3 is provided with a power interface 301 connected to the power end. The connection module 3 can control the power to flow into different connection end pins 21 of the busbar 2 to realize the power on and off of coils with different diameters in the stator winding 11.

[0031] See also Figure 3-Figure 5 The connection module 3 is composed of a base 31 and a rotating cover plate 32, and is in a circular ring shape. The base 31 is provided with a track for the rotating cover plate 32 to rotate. The rotating cover plate 32 is arranged above the base 31, and the base 31 is fixed. The base 31 has a first power-on interface 311 and a second power-on interface 312 in a circular array. The first power-on interface 311 and the second power-on interface 312 are respectively connected to the power supply interface 301 and the connection end pin 21. A first power-on interface 311 and a second power-on interface 312 form a power-on group, and each group of the first power-on interface 311 and the second power-on interface 312 There is a gap between the electrical interfaces 312, and a power-on terminal pin 321 is provided on the lower side of the rotating cover plate 32. When the power-on terminal pin 321 rotates between the first power-on interface 311 and the second power-on interface 312, conduction is achieved through contact, and the power current is guided to the stator winding 11. At the same time, the power-on groups of coils with the same diameter are controlled to be arranged at intervals. A driving module 4 is provided above the connecting module 3, and the driving module 4 can control the rotating cover plate 32 to rotate. The first power-on interface 311 and the second power-on interface 312 are arc-shaped plates, and the power-on groups are provided with 8, and the power-on terminal pins 321 are provided with 4.

[0032] The stator winding 11 in the motor stator 1 is divided into two groups of coils with different diameters. The diameters of the coils are different. Although the thicker coil will reduce the number of coil turns, it will have a larger cross-sectional area, thereby generating a larger magnetic field under the same current. The two groups of stator windings 11 with different diameters are connected to the connection module 3 through the bus 2. The power supply of the stator winding 11 is controlled by the connection module 3. The connection module 3 is provided with a first power supply interface 311 and a second power supply interface 312 arranged in groups. By controlling the connection between the first power supply interface 311 and the second power supply interface 312 in different groups, the stator windings 11 connected thereto are controlled. The energization of the stator winding 11. During the motor startup phase, a larger torque is required to overcome static friction and inertia. Therefore, a stator winding 11 with fewer turns and thicker wire diameter can be selected to provide a larger current and magnetic field strength, thereby generating a larger torque. At the same time, the diameter of the stator winding 11 will affect the rated power of the motor. The two are in a proportional relationship, that is, the larger the coil diameter, the greater the power it can usually carry. At the same time, the number of turns of the motor stator is related to the load voltage. The more turns, the higher the voltage required. The rated power of the motor is the product of voltage, current, power factor and efficiency. Therefore, the coil The influence of diameter on current and number of turns on voltage will indirectly affect the rated power of the motor. The design of a motor with a large coil diameter and a small number of turns usually means that at the same voltage, the motor can carry a larger current and thus output a higher power. In the starting stage of the automobile motor, a large amount of energy needs to be provided in a short time to overcome static friction and the inertia of starting the vehicle. The motor with this design can more effectively utilize the rated power, so that the vehicle can reach the required starting speed faster. In the stable operation stage of the motor, it is necessary to maintain a higher efficiency and lower heat generation. By connecting the module 3, the energized stator winding 11 is changed, and a stator winding 11 with a small coil diameter is used. The small diameter coil has a smaller resistance and generates less heat, so that while maintaining sufficient magnetic field strength, the resistance and current are reduced, thereby reducing heat generation and improving efficiency. In the stable operation and high-speed operation stage of the automobile motor, a motor with a small coil diameter and a large number of turns can more effectively utilize the rated power. This design enables the motor to achieve the required power output at a lower current during operation, thereby improving the utilization rate of the rated power, which helps to reduce the heat loss of the motor, improve the efficiency of the motor, and enable the automobile motor to maintain stable performance under long-term and high-load conditions.

[0033] An elastic component 313 is provided on the non-contact side of the first power-on interface 311 and the second power-on interface 312 and the power-on end pin 321. The elastic component 313 generates a thrust on the first power-on interface 311 and the second power-on interface 312, so that the first power-on interface 311 and the second power-on interface 312 and the power-on end pin 321 can maintain close contact, thereby avoiding a decrease in motor power due to poor contact.

[0034] The driving module 4 is driven by a small motor and is fixedly connected to the rotating cover plate 32 . When the driving module 4 is driven by the small motor to rotate, the rotating cover plate 32 rotates along with the driving module 4 .

[0035] Example 2: Please refer to Figure 1-Figure 3 , a busbar connects a permanent magnet synchronous motor, including a motor stator 1, a busbar 2 and a connection module 3. The motor stator 1 has a circular ring-shaped cross-section and is arranged in the motor, and the inner side is used to place the motor rotor. A stator winding 11 is provided in the motor stator 1. The stator winding 11 is a winding coil. Two coils with different diameters are provided in the stator winding 11, and the two coils are evenly arrayed along the circumference of the motor stator 1. When the coils with different diameters work alone, the motor can generate different rated powers to drive the rotor to move. The busbar 2 is arrayed with connection end pins 21, and different ends of the stator windings 11 are connected to different connection end pins 21. The other end of the connection end pin 21 is connected to the connection module 3. The connection module 3 is provided with a power interface 301 connected to the power end. The connection module 3 can control the power to flow into different connection end pins 21 of the busbar 2 to realize the power on and off of coils with different diameters in the stator winding 11.

[0036] See also Figure 3 and Figure 6-Figure 7 The connection module 3 is composed of a base 31 and a rotating cover plate 32, and is in a circular ring shape. The base 31 is provided with a track for the rotating cover plate 32 to rotate. The rotating cover plate 32 is arranged above the base 31, and the base 31 is fixed. The base 31 has a first power-on interface 311 and a second power-on interface 312 in a circular array. The first power-on interface 311 and the second power-on interface 312 are connected to the power supply interface 301 and the connection end pin 21 respectively. A first power-on interface 311 and a second power-on interface 312 A power-on group is formed, and a gap is provided between each group of first power-on interfaces 311 and second power-on interfaces 312. A power-on terminal pin 321 is provided on the lower side of the rotating cover plate 32. When the power-on terminal pin 321 rotates between the first power-on interface 311 and the second power-on interface 312, conduction is achieved through contact, and the power current is guided to the stator winding 11. At the same time, the interval setting of the power-on groups of coils with the same diameter is controlled. A driving module 4 is provided above the connecting module 3, and the driving module 4 can control the rotating cover plate 32 to rotate.

[0037] The stator winding 11 in the motor stator 1 is divided into two groups of coils with different diameters. The diameters of the coils are different. Although the thicker coil will reduce the number of coil turns, it will have a larger cross-sectional area, thereby generating a larger magnetic field under the same current. The two groups of stator windings 11 with different diameters are connected to the connection module 3 through the bus 2. The power supply of the stator winding 11 is controlled by the connection module 3. The connection module 3 is provided with a first power supply interface 311 and a second power supply interface 312 arranged in groups. By controlling the connection between the first power supply interface 311 and the second power supply interface 312 in different groups, the stator windings 11 connected thereto are controlled. The energization of the stator winding 11. During the motor startup phase, a larger torque is required to overcome static friction and inertia. Therefore, a stator winding 11 with fewer turns and thicker wire diameter can be selected to provide a larger current and magnetic field strength, thereby generating a larger torque. At the same time, the diameter of the stator winding 11 will affect the rated power of the motor. The two are in a proportional relationship, that is, the larger the coil diameter, the greater the power it can usually carry. At the same time, the number of turns of the motor stator is related to the load voltage. The more turns, the higher the voltage required. The rated power of the motor is the product of voltage, current, power factor and efficiency. Therefore, the coil The influence of diameter on current and number of turns on voltage will indirectly affect the rated power of the motor. The design of a motor with a large coil diameter and a small number of turns usually means that at the same voltage, the motor can carry a larger current and thus output a higher power. In the starting stage of the automobile motor, a large amount of energy needs to be provided in a short time to overcome static friction and the inertia of starting the vehicle. The motor with this design can more effectively utilize the rated power, so that the vehicle can reach the required starting speed faster. In the stable operation stage of the motor, it is necessary to maintain a higher efficiency and lower heat generation. By connecting the module 3, the energized stator winding 11 is changed, and a stator winding 11 with a small coil diameter is used. The small diameter coil has a smaller resistance and generates less heat, so that while maintaining sufficient magnetic field strength, the resistance and current are reduced, thereby reducing heat generation and improving efficiency. In the stable operation and high-speed operation stage of the automobile motor, a motor with a small coil diameter and a large number of turns can more effectively utilize the rated power. This design enables the motor to achieve the required power output at a lower current during operation, thereby improving the utilization rate of the rated power, which helps to reduce the heat loss of the motor, improve the efficiency of the motor, and enable the automobile motor to maintain stable performance under long-term and high-load conditions.

[0038] See also Figure 8-Figure 10The first power-on interface 311 and the second power-on interface 312 are arc-shaped plates, the power-on groups are provided with 8, and the power-on end pins 321 are provided with 8. The rotating cover plate 32 has three working states during the rotation process, namely: the power-on end pins 321 are in contact and communication with the four power-on groups controlling the large-diameter coils; the power-on end pins 321 are in contact and communication with the four power-on groups controlling the small-diameter coils; the power-on end pins 321 are in contact and communication with the eight power-on groups at the same time. By changing the rotation angle of the rotating cover plate 32, the large-diameter coil works alone, the small-diameter coil works alone, and the large and small-diameter coils work at the same time. The angle of the arc plate in the first power-on interface 311 and the second power-on interface 312 is 25 degrees to 35 degrees.

[0039] An elastic component 313 is provided on the non-contact side of the first power-on interface 311 and the second power-on interface 312 and the power-on end pin 321. The elastic component 313 generates a thrust on the first power-on interface 311 and the second power-on interface 312, so that the first power-on interface 311 and the second power-on interface 312 and the power-on end pin 321 can maintain close contact, thereby avoiding a decrease in motor power due to poor contact.

[0040] The driving module 4 is driven by a small motor and is fixedly connected to the rotating cover plate 32 . When the driving module 4 is driven by the small motor to rotate, the rotating cover plate 32 rotates along with the driving module 4 .

[0041] Working principle: The stator winding 11 in the motor stator 1 is divided into two groups of coils with different diameters. The diameters of the coils are different. Although the thicker coil will reduce the number of coil turns, it will have a larger cross-sectional area, thereby generating a larger magnetic field under the same current. The two groups of stator windings 11 with different diameters are connected to the connection module 3 through the bus 2. The power supply of the stator winding 11 is controlled by the connection module 3. The connection module 3 is provided with a first power supply interface 311 and a second power supply interface 312 arranged in groups. By controlling the connection between the first power supply interface 311 and the second power supply interface 312 in different groups, the stator windings connected thereto are controlled. The energization of the stator winding 11. During the motor startup phase, a larger torque is required to overcome static friction and inertia. Therefore, a stator winding 11 with fewer turns and thicker wire diameter can be selected to provide a larger current and magnetic field strength, thereby generating a larger torque. At the same time, the diameter of the stator winding 11 will affect the rated power of the motor. The two are in a proportional relationship, that is, the larger the coil diameter, the greater the power it can usually carry. At the same time, the number of turns of the motor stator is related to the load voltage. The more turns, the higher the voltage required. The rated power of the motor is the product of voltage, current, power factor and efficiency. Therefore, the coil The influence of diameter on current and number of turns on voltage will indirectly affect the rated power of the motor. The design of a motor with a large coil diameter and a small number of turns usually means that at the same voltage, the motor can carry a larger current and thus output a higher power. In the starting stage of the automobile motor, a large amount of energy needs to be provided in a short time to overcome static friction and the inertia of starting the vehicle. The motor with this design can more effectively utilize the rated power, so that the vehicle can reach the required starting speed faster. In the stable operation stage of the motor, it is necessary to maintain a higher efficiency and lower heat generation. By connecting the module 3, the energized stator winding 11 is changed, and a stator winding 11 with a small coil diameter is used. The small diameter coil has a smaller resistance and generates less heat, so that while maintaining sufficient magnetic field strength, the resistance and current are reduced, thereby reducing heat generation and improving efficiency. In the stable operation and high-speed operation stage of the automobile motor, a motor with a small coil diameter and a large number of turns can more effectively utilize the rated power. This design enables the motor to achieve the required power output at a lower current during operation, thereby improving the utilization rate of the rated power, which helps to reduce the heat loss of the motor, improve the efficiency of the motor, and enable the automobile motor to maintain stable performance under long-term and high-load conditions.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A busbar-connected permanent magnet synchronous motor, comprising a motor stator (1), a busbar (2) and a connection module (3), wherein the motor stator (1) has a circular ring-shaped cross section and is arranged in the motor, and the inner side is used to place the motor rotor, and a stator winding (11) is arranged in the motor stator (1), and the stator winding (11) is a winding coil, characterized in that: The stator winding (11) is provided with two coils of different diameters, and the two coils are evenly arrayed along the circumference of the motor stator (1), and when the coils of different diameters work alone, the motor can generate different rated powers to drive the rotor to move. The busbar (2) is arrayed with connection end pins (21), and the ends of different stator windings (11) are connected to different connection end pins (21). The other end of the connection end pin (21) is connected to a connection module (3), and the connection module (3) is provided with a power interface (301) connected to a power end. The connection module (3) can control the power supply to flow into different connection end pins (21) in the busbar (2) to realize the power on and off of the coils of different diameters in the stator winding (11). The connection module (3) is composed of a base (31) and a rotating cover plate (32), and is in a circular ring shape. The base (31) is provided with a track for the rotating cover plate (32) to rotate, and the rotating cover plate (32) is arranged above the base (31). , and the base (31) is fixedly arranged, the base (31) has a first power-on interface (311) and a second power-on interface (312) in a circular array, the first power-on interface (311) and the second power-on interface (312) are respectively connected to the power interface (301) and the connection end pin (21), a first power-on interface (311) and a second power-on interface (312) form a power-on group, and a gap is provided between each group of first power-on interfaces (311) and second power-on interfaces (312), a power-on end pin (321) is provided on the lower side of the rotating cover plate (32), when the power-on end pin (321) rotates to between the first power-on interface (311) and the second power-on interface (312), conduction is achieved through contact, the power supply current is guided to the stator winding (11), and at the same time, the interval arrangement of the power-on groups of coils with the same diameter is controlled, and a driving module (4) is provided above the connection module (3), and the driving module (4) can control the rotating cover plate (32) to rotate.

2. The busbar-connected permanent magnet synchronous motor according to claim 1, characterized in that: The first power-on interface (311) and the second power-on interface (312) are arc-shaped plates.

3. The busbar-connected permanent magnet synchronous motor according to claim 2, characterized in that: The power-on groups are provided in eight pieces, and the power-on end pins (321) are provided in four pieces.

4. The busbar-connected permanent magnet synchronous motor according to claim 2, characterized in that: The number of the energizing groups is 8, and the number of the energizing end pins (321) is 8. The rotating cover plate (32) has three working states during the rotation process, namely: the energizing end pins (321) are in contact and communication with the four energizing groups controlling the large diameter coils; the energizing end pins (321) are in contact and communication with the four energizing groups controlling the small diameter coils; and the energizing end pins (321) are in contact and communication with the eight energizing groups at the same time.

5. The busbar-connected permanent magnet synchronous motor according to claim 4, characterized in that: The angle of the arc plates in the first power supply interface (311) and the second power supply interface (312) is 25 degrees to 35 degrees.

6. The busbar-connected permanent magnet synchronous motor according to any one of claims 1 to 5, characterized in that: An elastic component (313) is provided on the non-contact side of the first power-on interface (311) and the second power-on interface (312) and the power-on end pin (321), and the elastic component (313) generates a thrust on the first power-on interface (311) and the second power-on interface (312).

7. The busbar-connected permanent magnet synchronous motor according to any one of claims 1 to 5, characterized in that: The driving module (4) is driven by a small motor and is fixedly connected to the rotating cover plate (32); when the driving module (4) is driven to rotate by the small motor, the rotating cover plate (32) rotates along with the driving module (4).

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