Three-phase air-core rotor permanent magnet motor

Abstract

The invention discloses a three-phase hollow-core rotor permanent magnet motor, which comprises a stator, a rotor, a shell and an external controller, a stator silicon steel magnetic core is provided with a wire slot and a plurality of same coil windings, the magnetic core is provided with a stator permanent magnet, and the rotor is fixedly provided with a mouse cage copper wire closed circuit assembly on the surface of a fiber resin thin-wall circular ring body hollow core. The three-phase asynchronous motor has the power-saving effect of a permanent magnet motor and the advantages and characteristics of a three-phase asynchronous motor, a three-phase alternating-current power supply needs to be configured for use after full-wave bridge rectification or a direct-current power supply needs to be used after inversion rectification during use, and the three-phase asynchronous motor is an environment-friendly new energy source and is energy-saving, noise-reducing, light in self-weight, low in use cost and suitable for popularization and application. The composite magnetic field intensity of the air gap can be instantly increased, the output power can be increased, the special controller can have the functional characteristics of an alternating current motor, a direct current motor, a servo stepping motor and the like, and the motor can be widely applied to various power devices, low-altitude unmanned aerial vehicles, mobile robots and mobile device power sources and has high social and economic values.

Description

Technical Field

[0001] The present invention relates to a light energy-saving three-phase air-core rotor permanent magnet motor that indirectly converts magnetic energy into mechanical energy, and more specifically to an AC asynchronous motor, belonging to the technical field of energy-saving applications of the superposition of electromagnetic fields and rare-earth permanent magnetic fields. Background Art

[0002] At present, rare-earth neodymium iron boron permanent magnets are used on the rotor of permanent magnet motors to replace the electromagnetic field of the excitation coil, which saves electricity significantly compared with traditional old-fashioned asynchronous motors. However, in some cases, certain performance of asynchronous motors is considered more suitable than that of permanent magnet synchronous motors. Therefore, it is necessary to continue to further research solutions to ensure that the motor is more efficient, safe and suitable. In addition, emerging equipment such as unmanned aerial vehicles and intelligent robots require power motors with light weight, high power and high energy efficiency. To address the above problems, starting from the existing traditional asynchronous motors, it is explored whether permanent magnets can be installed in series in the stator coils, and on the basis of following the electromagnetic principle, a new variable composite magnetic field is formed by superposition, so that the new variable composite magnetic field interacts with the induced magnetic field of the squirrel-cage closed wire on the rotor and rotates to do external work. According to the AC permanent magnet motor with the patent number ZL201720376551.7, the coil on each stator core of them is divided into two DC coils by an AC coil, and permanent magnets are respectively installed in series on the end faces of these two DC coils and the silicon steel sheet core. The original three AC coils become six DC coils, and under the action of the sinusoidal positive half-wave direct current and sinusoidal negative half-wave direct current output by the three-phase bridge rectifier, the intensity of the rotating variable composite magnetic field at the air gap position can be greatly increased: If the silicon steel sheets of the original three-phase asynchronous motor rotor are removed and replaced with a fiber resin air-core tube to form a rotor structure with a squirrel-cage closed copper wire circuit retained on the surface of the air-core tube, the rotational induced magnetic field acts to rotate and output power; The features are: 1. The permanent magnet is installed on the end face of the stator coil silicon steel core; 2. The rotor has no silicon steel laminations and rotates relying on the induced electromagnetic field of the squirrel-cage closed copper wire; 3. The input is a three-phase sinusoidal positive and negative DC power supply rectified by a three-phase full-wave bridge. Summary of the Invention

[0003] The present invention provides a special energy-saving three-phase air-core rotor permanent magnet motor system that is green and safe, novel in structure, energy-saving, noise-reducing, light in self-weight, easy to be intelligently controlled, and reliable in operation, aiming at the above-mentioned existing problems. It adopts a permanent magnet installed on the end face of the silicon steel magnetic core in the stator coil, and changes one stator coil of the traditional motor into two separate DC coils. One is energized, and the other corresponding DC coil is in a power-off state and cycles repeatedly. Under the control of the controller, they are alternately energized to change the electromagnetic field and operate. The surface polarity of the stator permanent magnet installed on the end face of the silicon steel magnetic core is the same as the electromagnetic polarity of the corresponding DC coil electromagnetic field. The pulsed electromagnetic field generated by energization is superimposed on the permanent magnetic field of the permanent magnet to form a new rotating composite magnetic field of dynamic pulses, which has the characteristics of a rotating magnetic field. The closed copper wire squirrel-cage frame on the rotor rotates under the action of the dynamic magnetic field induction and determines the rotation direction. The frequency, voltage, and current can be designed and adjusted through the controller; the innovative improvement content is: The three-phase air-core rotor permanent magnet motor of the present invention consists of four major parts: a stator, a rotor, a housing, and an external controller. There are several identical wire grooves and several identical positive and negative coil windings on the silicon steel laminated core of the stator. The stator permanent magnet is installed on the end face of the silicon steel core. When positive and negative sine-wave pulsed direct current is respectively fed into the stator DC coils, a dynamic sine-pulse composite magnetic field is generated. Under the control of a three-phase full-wave bridge rectifier power supply, this composite magnetic field forms a rotating magnetic field with periodic fluctuations at the air-gap position, driving the rotor to rotate. The installed stator permanent magnet has the same series relationship as the electromagnetic polarity of the corresponding stator DC coil electromagnetic field; one coil of one phase is divided into two DC coils, and three three-phase sequence coils are divided into six DC coils. Each three-phase sequence coil forms a combination of DC coil connection terminals of A+, B+, C+ and A-, B-, C- and O lines. Such a combination of positive and negative pairs and several integer multiples of phase sequence coil units constitutes a complete stator coil. The number of stator slots is an integer multiple of 6, and common slot numbers are 12, 24, 36, 48, 72, 96, etc.; for the rotor, a squirrel-cage copper wire closed circuit assembly is fixedly installed on the surface of a fiber resin thin-walled circular ring body, including the manufacturing process and technology of the rotor: 1. Stamping or etching the shape of the wire and wire connection fence on the thin copper plate. The thickness of the copper plate is determined by the parameters required for the designed wire stress surface. 2. The stamped thin copper plate is placed in a cylindrical mold and processed into a thin copper circular ring. The seam of the thin copper plate is welded to form a squirrel-cage closed wire structure, which can be single-layer or multi-layer. 3. The prefabricated fiber resin thin-walled circular ring is placed into the squirrel-cage closed wire structure. 4. An appropriate amount of resin is injected into the mold, and the mold is rotated at a high speed and cured by heating to form a squirrel-cage copper wire closed circuit assembly fixedly installed on the surface of the fiber resin thin-walled circular ring body. 5. The assembly is taken out and a metal circular sealing plate is welded to each of the circular hole end faces on both sides. A number of holes are pre-processed on the sealing plate for reducing self-weight and adjusting during the dynamic balance of the rotor. There is a rotor main shaft hole on the sealing plate. 6.The rotating shaft is installed and fixed in the main shaft hole of the end plate. After precision machining and dynamic balance adjustment, a qualified rotor is manufactured. The power supply output by the controller is a half-wave DC power supply with the same positive and negative sine waves or modified wave pulses through three-phase full-wave bridge rectification. It is connected to the 7 lead ends of the stator coil through a special plug and socket. The controller has several series of products according to the supplied power and configuration. The power supply for the controller is divided into various power sources such as three-phase power from power plants, DC power from batteries, or solar cells. The input three-phase AC power is directly connected to the matching controller and output after rectification. If the input power is DC, it needs to be first converted into three-phase AC through an inverter oscillation and then input into the controller for rectification and output. The main basic rectification circuit in the controller is a three-phase full-wave bridge rectification circuit, which generates three-phase sine pulse half-waves. According to different requirements of the required power voltage, current, and power, the electronic components and circuits in the three-phase full-wave bridge rectification basic circuit can be adjusted accordingly. For example, the three-phase fully controlled diode thyristor rectification circuit is mainly for small power motors, the three-phase fully controlled MOS tube rectification circuit is mainly for medium and small power motors, the three-phase fully controlled IGBT tube rectification circuit is mainly for medium and large power motors, and extra-large power requires a more complex integrated rectification circuit to undertake, forming different series of products of the controller. To improve the power supply quality, the controller also needs to go through a control center integrator composed of a single-chip microcomputer control logic, frequency conversion and voltage regulation, pulse width modulation, voltage and current stabilization, filtering circuit, receiving and transmitting, intelligent control circuit adjustment, and supercapacitor charge and discharge circuit switching switch during the rectification process. The appropriately configured supercapacitor has a great effect on instantaneously increasing the electromagnetic field strength of the stator DC coil, which can directly affect the instantaneous output power of the rotor. There are several connection sockets for intelligent control circuit adjustment on the controller. The half-sine wave or modified wave pulse currents with upper and lower waveforms are respectively supplied to two pairs of paired coils in the stator coil to generate a rotating magnetic field. Although the controller is an indispensable component in the motor system, it belongs to different technical fields, so it will not be discussed in depth in this article. Only the technical requirements for the power rectification function part in the controller system are described. The wiring method of the coil adopts the standard design of a conventional asynchronous motor. The surface of the shell is made with wrinkles and patterns to increase the surface area of the shell. The casing is made of silicon steel material. There is an installation base on the shell and a wire-passing hole communicating with the junction box. There is an outlet on the junction box.

[0004] The technical solution provided by the present invention is as follows: A three-phase air-core rotor permanent magnet motor consists of four major parts: a stator, a rotor, a housing, and an external controller. On the silicon steel laminated core of the stator, there are several identical wire grooves and several identical coil windings. Permanent magnets with the same polarity are adhesively mounted on the end face of the core. When positive and negative sine-wave pulse direct current is passed through the DC coils of the stator, a dynamic sine-pulse composite magnetic field is generated. Under the control of a three-phase full-wave bridge rectifier power supply, this composite magnetic field forms a rotating magnetic field effect at the air-gap position, driving the rotor to rotate. The phase-sequence coils are composed of 3 identical stator DC coil units, and each three groups of phase-sequence coils form a wiring terminal combination of A+, B+, C+ and A-, B-, C- and the O line. This positive-negative relative combination and several integer multiples of the same coil unit combination form a complete stator coil structure. The rotor includes a squirrel-cage copper wire closed-circuit assembly fixedly mounted on the surface of a fiber resin thin-walled circular ring body, end plates at both ends, and a rotating shaft to form a rotor structure. The controller outputs a three-phase full-wave bridge rectifier with the same positive and negative sine-wave or modified-wave pulse half-wave DC power supply, which is connected to the 7 outlet terminals of the stator DC coil through a special plug and socket. For heat dissipation, wrinkles and patterns are made on the surface of the housing to increase the surface area of the housing. The housing is made of silicon steel material, and there are mounting bases and wire-passing holes on the housing that communicate with a junction box, and there are outlet ports on the junction box.

[0005] For the three-phase air-core rotor permanent magnet motor, when changing the joints, the positive and negative two joints A+ and A- of the phase sequence should be simultaneously swapped with the positive and negative two joints B+ and B- of another phase sequence, or swapped with C+ and C- of another phase sequence, which can change the rotation direction. The surface of the permanent magnet is nickel-plated to prevent rust. The current actually flowing in the double-layer coils in the wire grooves is in an alternating electromagnetic field state during the amplitude period, generating the same impedance value in each relevant wire groove coil segment. The coil windings in the wire grooves are all double-layer windings, and several stator coil units form a complete stator core, indicating that the performance of the stator core composed of stator coil units can adapt to the principle of diversity. The silicon steel sheets and coils need to be subjected to insulation and withstand voltage treatment.

[0006] For the three-phase air-core rotor permanent magnet motor, the power supply is input by the controller. The controller has several series of products according to the power supply and configuration. The power supply for the controller can be various power sources such as the three-phase power supply of the power plant, the DC power supply of the battery, or the solar cell. If the input is a three-phase AC power supply, it is directly connected to the matching controller and then output after rectification. If the input power is DC, it needs to be oscillated by a three-phase inverter first and then input to the controller and output after rectification. The main basic rectification circuit in the controller is the three-phase full-wave rectification circuit, which generates three-phase sine pulse half-waves. According to different requirements of the required power supply voltage, current, and power, the electronic components and circuits in the three-phase full-wave rectification basic circuit are adjusted accordingly to form different series of products of the controller. To improve the power supply quality, the controller also needs to go through a control center integrator composed of a single-chip microcomputer control logic or chip, frequency conversion and voltage regulation, pulse width modulation, voltage and current stabilization, filtering circuit, transmission and reception, intelligent control circuit adjustment, and a switching switch for the supercapacitor charge and discharge circuit during the rectification process. The appropriately configured supercapacitor can instantaneously increase the electromagnetic field strength of the stator DC coil, directly affecting the instantaneous output power of the rotor. There are several connection sockets for intelligent control circuit adjustment on the controller, and the half-sine wave or modified wave pulse current with the upper and lower waveforms respectively is separately supplied to the two paired coils in the stator coil. Through precise control of the controller, the three-phase air-core rotor permanent magnet motor has the functional characteristics of AC, DC, servo, and stepper motors. Such a three-phase air-core rotor permanent magnet motor can exhibit different functional characteristics due to the configuration of different dedicated controllers, greatly expanding the supporting service field.

[0007] For the three-phase air-core rotor permanent magnet motor, the wiring ends of several lead-out wires of its stator coil winding are pre-connected to a special plug according to the design requirements. During use, the special plug is inserted into the 7-hole special socket that matches it. The number and cross-sectional shape and size of the metal plug rods of the special plug are exactly the same as the holes of the special socket. The power output wire and other functional control output wires of the controller are pre-connected to the special socket according to the design requirements, and should comply with the safety electrical appliance GB specification.

[0008] The described three-phase air-core rotor permanent magnet motor has a rotor with a squirrel-cage copper wire closed-circuit assembly fixedly installed on the surface of the hollow of a fiber resin thin-walled circular ring body, including the manufacturing processes and techniques of the rotor: 8-1. Stamping or etching a wire and wire connection fence-like pattern on a thin copper plate, the thickness of the copper plate being determined by the parameters of the required wire stress area; 8-2. Placing the stamped thin copper plate into a cylindrical mold to form a thin copper cylindrical ring, and welding the seams of the thin copper plate to form a squirrel-cage closed-wire structure, which can be single-layer or multi-layer; 8-3. Placing the prefabricated fiber resin thin-walled circular ring into the closed-wire structure; 8-4. Injecting an appropriate amount of resin into the mold, rotating the mold at high speed, and curing it by heating to form a squirrel-cage copper wire closed-circuit assembly fixedly installed on the surface of the hollow of the fiber resin thin-walled circular ring body; 8-5. Taking out the assembly and welding a metal circular sealing plate on each of the two circular hole end faces on both sides. The sealing plate is pre-processed with several holes for reducing self-weight and adjusting during the dynamic balancing of the rotor. There is a rotor main shaft hole on the sealing plate; 8-6. Installing and fixing the rotating shaft in the main shaft hole of the sealing plate, and performing precision machining and dynamic balancing adjustment; It also includes fixedly installing a permanent magnet assembly on the surface of the hollow of the fiber resin thin-walled circular ring body, and installing a circular sealing plate on each of the two circular hole end faces on both sides. The sealing plate is pre-processed with several holes for reducing self-weight and adjusting during the dynamic balancing of the rotor. There is a rotor main shaft hole on the sealing plate, forming a complete permanent magnet synchronous air-core rotor structure.

[0009] The beneficial effects of the present invention are as follows: The present invention provides a three-phase air-core rotor permanent magnet motor that is green and safe, has a novel structure, energy-saving and noise-reducing, is light in self-weight and easy to be intelligently controlled, and has reliable operation. It requires the controller to output several groups of pulsed sinusoidal half-wave direct current to supply the DC coils of the motor stator to form a rotating magnetic field at the air gap, so that the rotor is forced to rotate and output power. The rotor has the characteristics of a three-phase asynchronous motor with a squirrel-cage copper wire closed-circuit assembly fixedly installed on the surface of the hollow of a fiber resin thin-walled circular ring body. The stator is installed with permanent magnets, having the power-saving effect of a permanent magnet motor. The input power supply has both three-phase AC power and DC power, having the characteristics of an AC-DC motor. The design and manufacture follow the GB motor specifications, and the noise decibel data is reduced. It is suitable for use under various voltage conditions. When in use, it needs to be configured with a three-phase AC power supply that is rectified before use. When using a battery DC power supply, it needs to be rectified and voltage-regulated by an inverter oscillator and a frequency converter to be converted into a suitable pulsed DC source, and the scope of use is also expanded a lot. This machine is a green and environmental-friendly new energy source, close to zero emission and zero pollution, energy-saving and noise-reducing, with low usage cost and low failure rate. It can instantaneously increase the composite magnetic field intensity and increase the output power. Through a dedicated controller, it can have the functional characteristics of AC, DC, servo, stepper and other motors, and is widely used in various power equipment, low-altitude unmanned aerial vehicles, mobile robots, power sources of mobile equipment, and power sources of various special equipment for military and civilian innovation, having high social and economic value. Description of the Drawings

[0010] Figure 1This is a schematic cross-sectional view of the inner-rotor type with a fixed housing for the three-phase air-core rotor permanent magnet motor of the present invention.

[0011] Figure 2 This is a schematic A-A cross-sectional view of the inner-rotor type with a fixed housing for the three-phase air-core rotor permanent magnet motor of the present invention.

[0012] Figure 3 This is a schematic view of the air-core rotor in the fixed housing of the three-phase air-core rotor permanent magnet motor of the present invention.

[0013] Figure 4 This is a schematic waveform diagram of the three-phase full-wave bridge rectification of the output power supply of the controller externally connected to the three-phase air-core rotor permanent magnet motor of the present invention.

[0014] In the figure: 1. Three-phase air-core rotor permanent magnet motor; 2. Stator; 3. Rotor; 4. Housing; 5. Air gap; 6. Stator permanent magnet; 7. Stator wire groove; 8. Stator silicon steel sheet; 9. Closed circuit of rotor squirrel-cage copper wires; 10. Rotor fiber resin thin-walled circular ring body; 11. Rotating shaft; 12. Sealing plate; 13. Junction box; 14. Outlet; 15. Schematic of the positive half-wave of the single-phase positive sine pulse of the thick black line A+; 16. Schematic of the negative half-wave of the single-phase negative sine pulse of the thick black line A-; 17. Positive half-wave of the three-phase rectified sine or modified wave pulse; 18. Negative half-wave of the three-phase rectified sine or modified wave pulse; 19. Hole; 20. Wire passing port; 21. Base; 22. Outlet. Detailed implementation manners

[0015] In the embodiments of the present invention, referring to the above Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the three-phase hollow rotor permanent magnet motor 1 includes a stator 2, a rotor 3, a housing 4, and an external controller, which are composed of four major parts. On the silicon steel laminated core of the stator, there are several identical wire grooves 7 and several identical coil windings. The same-polarity stator permanent magnets 6 are adhesively installed on the end face of the core. When positive and negative sinusoidal pulse direct current is applied to the stator DC coils, a dynamic sinusoidal pulse composite magnetic field is generated. Under the control of a three-phase full-wave bridge rectifier power supply, this composite magnetic field forms a rotating magnetic field effect at the air gap 5 position, driving the rotor 3 to rotate. The phase sequence coils are composed of 3 identical stator DC coil units, and each three groups of phase sequence coils form a wiring terminal combination of A+, B+, C+ and A-, B-, C- and the O line. This positive-negative relative combination and several integer multiples of the same coil unit combination form a complete stator coil structure. The rotor 3 includes a squirrel-cage copper wire closed circuit 9 component fixed on the surface of a fiber resin thin-walled circular ring body 10, and both ends are sealed with end plates 12 and a rotating shaft 11 to form the structure of the rotor 3. The controller outputs a three-phase full-wave bridge rectifier with the same positive and negative sinusoidal or modified wave pulse half-wave DC power supply, which is connected to the 7 outlet ends of the stator DC coils through a special plug and socket. For heat dissipation, wrinkles and patterns are made on the surface of the housing 4 to increase the surface area of the housing 4. The housing is made of silicon steel material. There is a mounting base 21 on the housing and a wire passing port 20 communicating with the junction box 13. There is an outlet port 22 on the junction box 13.

[0016] For the three-phase hollow rotor permanent magnet motor 1, its rotor 3 has a squirrel-cage copper wire closed circuit 9 component fixed on the hollow surface of the fiber resin thin-walled circular ring body 10, including the manufacturing process and technology of the rotor 3: 8-1. Stamping or etching a wire and wire connection fence-like pattern on a thin copper plate, and the thickness of the copper plate is determined by the required design parameters of the wire stress area. 8-2. The stamped thin copper plate is placed in a cylindrical mold and processed into a thin copper cylindrical ring, and the seams of the thin copper plates are welded to form a squirrel-cage closed wire structure, which can be single-layer or multi-layer. 8-3. The prefabricated fiber resin thin-walled circular ring is placed into the closed wire structure. 8-4. An appropriate amount of resin is injected into the mold, and the mold is rotated at high speed and cured by heating to form a squirrel-cage copper wire closed circuit 9 component fixed on the hollow surface of the fiber resin thin-walled circular ring body 10. 8-5. The component is taken out and a metal circular end plate 12 is welded to each of the two circular hole end faces on both sides. A number of holes 19 are pre-processed on the end plate 12 for reducing the self-weight and adjusting during the dynamic balance of the rotor 3. There is a hole for the rotating shaft 11 of the rotor 3 on the end plate 12. 8-6. The rotating shaft 11 is installed and fixed in the hole for the rotating shaft 11 of the end plate, and undergoes precision machining and dynamic balance adjustment. It also includes a permanent magnet component fixed on the hollow surface of the fiber resin thin-walled circular ring body 10, and a circular end plate 12 is installed on each of the two circular hole end faces on both sides. A number of holes 19 are pre-processed on the end plate 12 for reducing the self-weight and adjusting during the dynamic balance of the rotor. There is a hole for the rotating shaft 11 of the rotor 3 on the end plate 12, forming a complete permanent magnet synchronous hollow rotor structure.

[0017] For the three - phase air - core rotor permanent - magnet motor 1, the power supply is input by the controller. The controller has several series of products according to the power supply and configuration. The power supply for the controller can be various power sources such as the three - phase power supply of a power plant, the DC power supply of a battery, or a solar cell, etc. If the input is a three - phase AC power supply, it is directly connected to a matching controller and then output after rectification. If the input power is DC, it needs to be oscillated by a three - phase inverter first and then input to the controller and output after rectification. The main basic rectification circuit in the controller is a three - phase full - wave rectification circuit, which generates three - phase sine - pulse half - waves. According to different requirements of the required power supply voltage, current, and power, the electronic components and circuits in the three - phase full - wave rectification basic circuit are adjusted accordingly to form different series of products of the controller. To improve the power supply quality, during the rectification process, the controller also needs to go through a control center integrator composed of a single - chip microcomputer control logic or chip, frequency conversion and voltage regulation, pulse width modulation, voltage and current stabilization, filter circuit, transmission and reception, intelligent control circuit regulation, and a switching switch for the super - capacitor charge - discharge circuit. A super - capacitor with an appropriate capacity can instantaneously increase the electromagnetic field strength of the stator DC coil, directly affecting the instantaneous output power of the rotor. There are several connecting sockets for intelligent control circuit regulation on the controller, and half - sine - wave or modified - wave pulse currents with upper and lower waveforms are separately supplied to two paired coils in the stator coil. Through precise control by the controller, the three - phase air - core rotor permanent - magnet motor has the functional characteristics of AC, DC, servo, stepper motors, etc. Such a three - phase air - core rotor permanent - magnet motor 1 can exhibit different functional characteristics due to the configuration of different dedicated controllers, greatly expanding the scope of supporting services.

[0018] For the three - phase air - core rotor permanent - magnet motor 1, the connection heads of several lead - out wires of its stator coil winding are pre - connected to a special plug with 7 plugs, including 6 live - wire plugs and 1 neutral - wire plug, according to the design requirements. During use, the special plug is inserted into a special socket that matches it. The number and cross - sectional shape and size of the metal rods of the special plug are exactly the same as the holes of the special socket. The power output line of the controller is connected to a special socket with 7 sockets, including 6 live - wire sockets and 1 neutral - wire socket, which should comply with the safety electrical appliance GB standard.

[0019] As mentioned above, it is only a preferred embodiment of the present invention, and it cannot limit the scope of implementation of this application. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. Three-phase air-core rotor permanent magnet motor, characterized in that: It includes four major parts: a stator, a rotor, a housing, and an external controller; on the silicon steel core of the stator, there are several identical wire grooves and several identical coil windings. Permanent magnets with the same polarity are installed on the end face of the core. When positive and negative sinusoidal pulse direct currents are respectively passed through the DC coils of the stator, a dynamic sinusoidal pulse composite magnetic field is generated. Under the control of a three-phase full-wave bridge rectifier power supply, this composite magnetic field forms a rotating magnetic field effect at the air gap position, driving the rotor to rotate; one coil of one phase is divided into two DC coils, and three three-phase sequence coils are divided into six DC coils. Each three-phase sequence coil constitutes a wiring terminal combination of A+, B+, C+ and A-, B-, C- and the O line. This positive-negative relative combination and several integer multiples of the same coil unit combination constitute a complete stator DC coil structure. The seven outgoing ends of the stator DC coil are connected through a special plug and socket.

2. The three-phase air-core rotor permanent magnet motor according to claim 1, wherein: It includes the rotor, which is a squirrel-cage copper wire closed circuit assembly fixedly installed on the hollow surface of a fiber resin thin-walled circular ring body. It also includes the manufacturing process and technology of the rotor: 2-1. Stamping or etching a wire and wire connection fence-shaped pattern on a thin copper plate, and the thickness of the copper plate is determined by the required design parameters of the wire stress area; 2-2. Putting the stamped thin copper plate into a cylindrical mold and processing it into a thin copper cylindrical ring, and welding the joints of the thin copper plates to form a squirrel-cage closed wire structure, which can be single-layer or multi-layer; 2-3. Putting the prefabricated fiber resin thin-walled circular ring into the closed wire structure; 2-4. Injecting an appropriate amount of resin into the mold, rotating the mold at high speed, and forming a squirrel-cage copper wire closed circuit assembly fixedly installed on the hollow surface of the fiber resin thin-walled circular ring body through heating and curing; 2-5. Taking out the assembly and welding a metal circular sealing plate on each of the two circular hole end faces on both sides. Several holes are pre-processed on the sealing plate for reducing self-weight and adjusting during the dynamic balance of the rotor. There is a rotor main shaft hole on the sealing plate; 2-6. Installing and fixing the rotating shaft in the main shaft hole of the sealing plate, and through precision machining and dynamic balance adjustment, a complete asynchronous hollow rotor structure is formed; It also includes a permanent magnet assembly fixedly installed on the hollow surface of the fiber resin thin-walled circular ring body. A circular sealing plate is installed on each of the two circular hole end faces on both sides. Several holes are pre-processed on the sealing plate for reducing self-weight and adjusting during the dynamic balance of the rotor. There is a rotor main shaft hole on the sealing plate, forming a complete permanent magnet synchronous hollow rotor structure.

3. The three-phase air-core rotor permanent magnet motor according to claim 1, wherein: It includes making wrinkles and patterns on the surface of the housing to increase the surface area of the housing. The housing is made of silicon steel material. There are mounting bases on the housing and wire passing holes communicating with the junction box, and there are outgoing ports on the junction box.

4. The three-phase air-core rotor permanent magnet motor according to claim 1, characterized in that: The external controller includes a control center integrator composed of a three-phase full-wave bridge rectifier as the basis, through inversion, control logic, variable frequency and voltage regulation, pulse width modulation, voltage and current stabilization, transmission and reception, intelligent control circuit regulation, and a switching switch for the supercapacitor charge and discharge circuit. There are several intelligent control circuit adjustment sockets installed on the controller. The supplied power is input by the controller, and the power supplied to the controller is respectively a three-phase power supply from a power plant, a DC power supply from a battery pack, or multiple supply power sources of solar cells. If the input is a DC power supply, it needs to first pass through an inverter to oscillate and output a sine wave or modified wave AC power supply to supply the controller. Or if the input is a three-phase AC power supply, it is directly supplied to the controller. The controller then undergoes rectification, variable frequency and frequency modulation, voltage and current stabilization, and outputs a sine wave or modified wave pulsed DC power supply with the same upper and lower waveforms respectively, and outputs 7 terminal wires to supply the stator DC coil and the electricity required by other auxiliary equipment in the system. Through the precise regulation of the controller, the three-phase hollow rotor permanent magnet motor has the functional characteristics of AC, DC, servo, and stepper motors.

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