Combined permanent magnet self-inductance generator motor

Abstract

The invention discloses a combined type permanent magnet self-inductance generator motor which is composed of a disc type stator, a radial stator, a permanent magnet rotor, a power switch control system and a power generation switch control system. The disc type stator generates clockwise torque force on the permanent magnet rotor in the axial magnetic field direction, and the radial stator also generates clockwise torque force on the permanent magnet rotor in the radial magnetic field direction. And electric energy generated by the disc-type stator winding iron core, the radial stator winding iron core and the winding opposite to the permanent magnet rotor due to power-off self-inductance is guided to a battery or other electric equipment by closing the solid-state relay II. Therefore, compared with a single disc type or radial type permanent magnet self-inductance generator motor, the permanent magnet rotor has larger torque force, and the stator winding converts magnetic field energy into electric energy to be output, so that the permanent magnet energy is higher in utilization rate. If the device is installed on an electric automobile, the cruising ability of the electric automobile is greatly improved, and the battery consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of permanent magnet motors, and specifically relates to a combined permanent magnet self-induction generating motor. Background Art

[0002] During the operation of a permanent magnet motor, the change in the stator winding current generates a self-induced electromotive force (i.e., back electromotive force), and its energy is usually dissipated in the form of heat through the winding resistance. Existing technologies show that the self-induced electromotive force generated by a permanent magnet motor can be recycled into electric energy through a power electronic device (such as an inverter) and an energy storage system. For example, when braking, the motor switches to the generator mode, and by reversing the current direction through the inverter, mechanical energy is converted into electric energy and stored in a battery or a super capacitor (Application of Permanent Magnet Synchronous Motor in Braking Energy Recovery of Pure Electric Commercial Vehicles, Automotive Testing Network). Another patented technology shows that by designing a stator winding with a non-air-gap magnetic circuit and combining it with a full-bridge switching circuit, the self-induced current can be recycled to a capacitor or a battery in real time. For example, when the rotor interacts with the stator magnetic field, the back electromotive force generated by the on-off of the coil is stored through a diode and a capacitor, achieving efficient energy recovery (CN1299178A, CN211239622U). However, the above technologies all involve realizing electric energy recovery by means of external electrical components or circuit designs, and there are technical problems of complex structures and cumbersome electric energy recovery processes.

[0003] Based on the above, the applicant has respectively developed a permanent magnet radial self-induction generating motor and a permanent magnet disk-type self-induction generating motor. Through a unique arrangement structure of the stator and the permanent magnet rotor, and in cooperation with the power switch control system and the power generation control switch provided in the motor itself, the self-induced electromotive force generated by the permanent magnet motor is converted into electric energy and guided to a charging battery or other electrical equipment, realizing the recycling and utilization of the self-induced electromotive force. However, the permanent magnet self-induction generating motor with a single stator has problems of relatively small stator torque force and insufficient utilization rate of the magnetic energy of the permanent magnet. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problems that the existing permanent magnet motor has a complex electric energy recovery structure and a cumbersome process, and the permanent magnet radial self-induction generating motor and the permanent magnet disk-type self-induction generating motor independently developed by the applicant have low utilization efficiency of permanent magnet energy conversion. A combined permanent magnet self-induction generating motor is provided, which realizes the maximum utilization of permanent magnet energy by complementing the advantages of a disk-type stator and a radial stator for electric energy recovery.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: A combined permanent magnet self-induction generating motor, comprising a machine body, at least one group of stators and a permanent magnet rotor, a power switch control system and a power generation control switch; The body is in a horizontal cylindrical shape, and the power switch control system and the power generation control switch are installed on the top of the body; The stator includes a disc stator and a radial stator. The radial stator is in a horizontal cylindrical shape and is tightly installed in the inner cavity of the body. Inside the radial stator, a radial stator winding core and a non-winding core of the radial stator are arranged at intervals. On the surface of the non-winding core of the radial stator, permanent magnet patches are provided; The disc stator includes a left stator and a right stator with the same structure. The left stator and the right stator are coaxial with the body, symmetrically arranged at both ends of the outer periphery of the permanent magnet rotor, and tightly installed in the inner cavity of the radial stator; On the opposite side of the left stator and the right stator, a serrated structure is provided. In the groove of the serrated structure, a disc stator winding core is provided, and on the platform of the serrated structure, a non-winding core of the disc stator is provided. On the surface of the non-winding core of the disc stator, disc stator like-polarity permanent magnet patches are provided; The permanent magnet rotor is installed in the inner cavity of the radial stator. It includes a rotor shaft, and a permanent magnet rotor assembly is sleeved outside the rotor shaft. A number of permanent magnet blocks are symmetrically arranged on the outer periphery of the permanent magnet rotor assembly. At both ends of the permanent magnet block along the axial direction of the permanent magnet rotor assembly, non-magnetic protection discs of the permanent magnet block are provided; The power generation control switch includes a solid-state relay I and a solid-state relay II; The power switch control system includes a circuit control board, a power supply positive electrode and a power supply negative electrode. The circuit control board is electrically connected to the detection position of the permanent magnet rotor through an optical medium detection signal line; The power supply positive electrode is electrically connected to the input end of the circuit control board and the solid-state relay I respectively. The output end of the circuit control board is electrically connected to the input ends of the solid-state relay I, the solid-state relay II and the power supply negative electrode respectively. The output end of the solid-state relay I is electrically connected to the input end of the solid-state relay II and the motor stator winding respectively. The input end of the solid-state relay II is electrically connected to the input end of the rechargeable battery. The output ends of the motor stator winding and the rechargeable battery are electrically connected to the power supply negative electrode respectively.

[0006] As a further preference of the technical solution of the present invention, the axial gap between the permanent magnet patches of the disc stator and the permanent magnet rotor is ≥5 mm.

[0007] Furthermore, the gap between the inner cavity of the radial stator and the outer wall of the non-magnetic protection disc of the rotor permanent magnet block is 1 mm.

[0008] Furthermore, both ends of the rotor shaft are respectively inserted into the flange holes of the left flange and the right flange, and the left flange and the right flange are respectively fastened to both ends of the body.

[0009] Furthermore, a left flange bearing is provided in the flange hole of the left flange, and a right flange bearing is provided in the flange hole of the right flange. Both ends of the rotor shaft are respectively inserted into the bearing holes of the left flange bearing and the right flange bearing.

[0010] Further, a left bearing end cover is provided outside the left flange bearing, and a right bearing end cover is provided outside the right flange bearing. The left flange and the right flange are respectively fastened to both ends of the machine body through fastening bolts.

[0011] Further, the permanent magnet blocks are vertically installed along the axial direction of the rotor shaft between the non-magnetic protection discs of two adjacent permanent magnet blocks, and the magnetic field directions of all the permanent magnet blocks are towards the rotor shaft direction.

[0012] Further, the working surface widths of the radial stator winding core and the disc-shaped stator winding core are equal, and the widths of the permanent magnet patches with the same polarity are equal.

[0013] Further, the winding cores and the non-winding cores of the disc-shaped stator and the radial stator are equally made into 2, 4, 6, 8... N pairs, or 2, 3, 4, 5, 6, 7... N pairs.

[0014] Further, when the winding cores and the non-winding cores are equally made into 2, 4, 6, 8... N pairs, the number of installed permanent magnet blocks is 2, 4, 6, 8... N; when the winding cores and the non-winding cores are equally made into 2, 3, 4, 5, 6, 7... N pairs, the number of installed permanent magnet blocks is 2, 3, 4, 5, 6, 7... N pieces.

[0015] Compared with a single disc-type or radial-type permanent magnet self-induction generator motor, the beneficial effects of the present invention are as follows: The present invention is composed of a disc-shaped stator, a radial stator, a permanent magnet rotor, a power switch control system, and a power generation switch control. The disc-shaped stator generates a clockwise torque force on the permanent magnet rotor in the axial magnetic field direction, and the radial stator also generates a clockwise torque force on the permanent magnet rotor in the radial magnetic field direction. At the same time, the electric energy generated by the winding cores of the disc-shaped stator winding core and the radial stator winding core and the permanent magnet rotor due to power-off self-induction is guided to the rechargeable battery or other electrical equipment through the closing of the solid-state relay II. Thus, the permanent magnet rotor obtains a larger torque force compared with a single disc-type or radial-type permanent magnet self-induction generator motor, and the stator winding converts the magnetic field energy into electrical energy for output, so that the permanent magnet energy is utilized more efficiently. If installed on an electric vehicle, it will greatly improve the endurance of the electric vehicle and reduce the battery consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the combined permanent magnet self-induction generator motor of the present invention; Figure 2 is a schematic composition diagram of the radial stator in the combined permanent magnet self-induction generator motor of the present invention; Figure 3 is a schematic composition diagram of the disc-shaped stator in the combined permanent magnet self-induction generator motor of the present invention; Figure 4Schematic diagram of the composition of the rotor in the combined permanent magnet self-induction generator motor of the present invention; Figure 5 Working principle diagram of the combined permanent magnet self-induction generator motor of the present invention; Figure 6 Schematic diagram of the circuit connection between the power switch control system and the power generation control switch of the present invention; Reference numerals: 1, fastening bolt; 2, left bearing end cover; 3, left flange bearing; 4, left flange; 5, right flange; 6, right flange bearing; 7, right bearing end cover; 8, disc stator; 9, permanent magnet rotor; 10, radial stator; 12, power switch control system; 13, body; 14, power generation control switch; 15, permanent magnet patch; 16, radial stator winding core; 17, radial stator non-winding core; 18, same-polarity permanent magnet patch; 19, disc stator non-winding core; 20, disc stator winding core; 21, permanent magnet rotor assembly; 22, rotor shaft; 23, non-magnetic protection disc for permanent magnet block; 24, permanent magnet block. Detailed implementation mode

[0017] The structure and working principle of the permanent magnet radial self-induction generator motor of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] As Figure 1-6 shown, a combined permanent magnet self-induction generator motor provided by the present invention includes a body 13, a set of stators and a permanent magnet rotor 9, a power switch control system 12 and a power generation control switch 14. The body 13 is in a horizontal cylindrical shape, and the power switch control system 12 and the power generation control switch 14 are installed on the top of the body 13. The stator includes a disc stator 8 and a radial stator 10. The radial stator 10 is in a horizontal cylindrical shape and is tightly installed in the inner cavity of the body 13. Radial stator winding cores 16 and radial stator non-winding cores 17 are arranged at intervals inside the radial stator 10, and permanent magnet patches 15 are provided on the surface of the radial stator non-winding cores 17. The disc stator 8 includes a left stator and a right stator with the same structure. The left stator and the right stator are coaxial with the body 13, symmetrically arranged at both ends of the outer periphery of the permanent magnet rotor 9, and are tightly installed in the inner cavity of the radial stator 10. A serrated structure is provided on the opposite side of the left stator and the right stator. A disc stator winding core 20 is provided in the groove of the serrated structure, and a disc stator non-winding core 19 is provided on the platform of the serrated structure. Disc stator same-polarity permanent magnet patches 18 are provided on the surface of the disc stator non-winding core 19.

[0019] The permanent magnet rotor 9 is installed in the inner cavity of the radial stator 10. It includes a rotor shaft 22, a permanent magnet rotor assembly 21 is sleeved outside the rotor shaft 22, a plurality of permanent magnet blocks 24 are symmetrically arranged on the outer periphery of the permanent magnet rotor assembly 21, and non-magnetic protection discs 23 for permanent magnet blocks are provided at both ends of the permanent magnet blocks 24 along the axial direction of the permanent magnet rotor assembly 21; The power generation control switch 14 includes a solid state relay I and a solid state relay II; The power switch control system 12 includes a circuit control board, a power supply positive electrode and a power supply negative electrode. The circuit control board is electrically connected to the detection position of the permanent magnet rotor 9 through an optical medium detection signal line; the power supply positive electrode is electrically connected to the input ends of the circuit control board and the solid state relay I respectively. The output end of the circuit control board is electrically connected to the input ends of the solid state relay I, the solid state relay II and the power supply negative electrode respectively. The output end of the solid state relay I is electrically connected to the input end of the solid state relay II and the motor stator winding respectively. The input end of the solid state relay II is electrically connected to the input end of the rechargeable battery. The output ends of the motor stator winding and the rechargeable battery are electrically connected to the power supply negative electrode respectively.

[0020] Specifically, the axial gap between the permanent magnet patches 18 of the same polarity of the disc stator 8 and the permanent magnet rotor 9 is ≥5 mm. The gap between the inner cavity of the radial stator 10 and the outer wall of the non-magnetic protection disc 23 of the rotor permanent magnet block is 1 mm.

[0021] Specifically, both ends of the rotor shaft 22 are respectively inserted into the flange holes of the left flange 4 and the right flange 5. The left flange 4 and the right flange 5 are respectively fastened to both ends of the machine body 13. A left flange bearing 3 is provided in the flange hole of the left flange 4, and a right flange bearing 6 is provided in the flange hole of the right flange 5. Both ends of the rotor shaft 22 are respectively inserted into the bearing holes of the left flange bearing 3 and the right flange bearing 6. A left bearing end cover 2 is provided outside the left flange bearing 3, and a right bearing end cover 7 is provided outside the right flange bearing 5. The left flange 4 and the right flange 5 are respectively fastened to both ends of the machine body 13 through fastening bolts 1.

[0022] The permanent magnet blocks 24 are vertically installed along the axial direction of the rotor shaft 22 between two adjacent non-magnetic protection discs 23 of the permanent magnet blocks, and the magnetic field directions of all the permanent magnet blocks 24 are all towards the direction of the rotor shaft 22.

[0023] The working surface widths of the radial stator winding core 16 and the disc stator winding core 20 are equal, and the widths of the permanent magnet patches 15 and the permanent magnet patches 18 of the same polarity are equal.

[0024] In the present invention, the winding cores and non-winding cores of the disc stator 8 and the radial stator 10 are made equally, and the number of installed permanent magnet blocks 24 is 2, 4, 6, 8, 10... N blocks.

[0025] Refer to Figure 5 , the working principle of the present invention is as follows: Figure 5In (a), the stator winding cores (radial stator winding core 16, disc-type stator winding core 20) are in the power-off mode. The stator winding cores are magnetized by the N poles of the permanent magnet patches (permanent magnet patch 15, like-polarity permanent magnet patch 18) to form a magnetic closed loop NS. That is, the working surface of the stator winding cores shows as the S pole. At this time, the left S pole of the rotor permanent magnet block 24 is repelled by the S pole of the magnetic field of the stator winding cores, and the right N pole of the rotor permanent magnet block 24 is attracted by the S pole of the stator winding cores. At this time, as Figure 5 shown in (b), when the stator winding core switch (solid-state relay I) where the rotor permanent magnet block 24 is located is closed and powered on, the stator winding core here shows as the N pole. At this time, there is no torque relationship between the stator winding core and the magnetic field of the rotor permanent magnet block 24. The left S pole of the rotor permanent magnet block 24 is only repelled by the S pole (not powered on) of the stator winding core, and the right N pole is attracted by the S pole (not powered on) of the fourth group of stator winding cores. When the rotor permanent magnet block 24 reaches Figure 5 the position in (c), the power-on switch (solid-state relay I) of the stator winding core is disconnected, and the stator permanent magnet patch quickly magnetizes the stator winding core and forms a magnetic closed loop. At the same time, at the moment when the solid-state relay I is disconnected, the solid-state relay II is closed to absorb the electric energy generated by the self-inductance of the stator winding core when powered off. At this time, the left S pole of the rotor permanent magnet block 24 is repelled by the S pole of the powered-off stator winding core here, and the right N pole of the rotor permanent magnet block 24 is attracted by the S pole (not powered on) of the fourth group of stator winding cores, and so on.

[0026] The applicant verified through a prototype that the combined self-inductive power generation motor provided by the present invention conforms to the above working principle, and proved that the magnetic fields formed by the winding cores and the like-polarity permanent magnet patches without winding cores all follow this working principle.

[0027] Based on the above working principle, referring to Figure 6, when the combined permanent magnet self-induction generator motor of the present invention is working, since the stator non-winding iron cores (17, 19) have the same-polarity stator permanent magnet patches (15, 18) pasted on their surfaces, the patches magnetize the stator non-winding iron cores (17, 19) to naturally form a magnetic closed loop. When the permanent magnet blocks 24 on the permanent magnet rotor 9 are attracted, the optical medium detection signal line of the circuit control board detects that the rotor power supply is in the conducting position. The circuit control board controls the solid-state relay Ⅰ to conduct and the solid-state relay Ⅱ to turn off. The stator winding iron cores (16, 20) generate the same polarity as the stator permanent magnet patches (15, 18). At this time, there is no torque relationship between the permanent magnet rotor 9 and the stator winding iron cores (16, 20). The current flows from the positive pole of the power supply through the solid-state relay Ⅰ, the motor stator winding to the negative pole of the power supply, and the motor stator winding generates a magnetic field to drive the rotor to rotate. When the permanent magnet block 24 of the permanent magnet rotor 9 rotates past the working surface width of the stator winding iron cores (16, 20), the optical medium detection signal line of the circuit control board detects that the rotor power supply is in the off position. The circuit control board controls the solid-state relay Ⅰ to turn off and the solid-state relay Ⅱ to conduct. At this time, the stator permanent magnet patches (15, 18) magnetize the stator winding iron cores (16, 20) to generate the same polarity as the permanent magnet block 24 at that place, repelling the permanent magnet rotor 9 to rotate. At the same time, when the solid-state relay Ⅰ turns off instantaneously, the stator winding iron cores (16, 20) generate a self-induced electromotive force, and the stator permanent magnet patches (15, 18) also magnetize the stator winding iron cores (16, 20) to generate an induced electromotive force. At the same time, the solid-state relay Ⅱ conducts, and the self-induced current flows from the input end of the motor stator winding through the solid-state relay Ⅱ, then through the rechargeable battery and finally through the output end of the motor stator winding to form a closed loop, guiding the electric energy to the rechargeable battery or other electrical equipment. Therefore, the permanent magnet rotor 9 obtains torque, and the stator winding iron cores (16, 20) convert the magnetic field energy into electrical energy and output it. Thus, the permanent magnet rotor 9 obtains a larger torque force compared to a single disc-type or radial permanent magnet self-induction generator motor, maximizing the utilization of permanent magnet energy and realizing the recovery of electrical energy.

[0028] It should be noted that in the above description of the working process, the permanent magnet patch 15, the radial stator winding iron core 16, and the radial stator non-winding iron core 17 correspond to the radial stator 10, and the same-polarity permanent magnet patch 18, the disc-type stator non-winding iron core 19, and the disc-type stator winding iron core 20 correspond to the disc-type stator 8. The combined stator motor only increases the torque force of a single stator motor and has the same working principle as a single stator motor.

Claims

1. A combined permanent magnet self-induction generating motor, characterized in that, It includes a body, at least one set of stator and permanent magnet rotor, a power switch control system and a power generation control switch; The body is in a horizontal cylindrical shape, and the power switch control system and the power generation control switch are installed on the top of the body; The stator includes a disc stator and a radial stator. The radial stator is in a horizontal cylindrical shape and is tightly installed in the inner cavity of the body. Inside the radial stator, a radial stator winding core and a non-wound radial stator core are arranged at intervals. On the surface of the non-wound radial stator core, there are permanent magnet patches with the same polarity. The disc stator includes a left stator and a right stator with the same structure. The left stator and the right stator are coaxial with the body, symmetrically arranged at both ends of the outer periphery of the permanent magnet rotor, and tightly installed in the inner cavity of the radial stator. On the opposite side of the left stator and the right stator, there is a serrated structure. In the groove of the serrated structure, there is a disc stator winding core, and on the platform of the serrated structure, there is a non-wound disc stator core. On the surface of the non-wound disc stator core, there are disc stator permanent magnet patches with the same polarity; The permanent magnet rotor is installed in the inner cavity of the radial stator. It includes a rotor shaft, and a permanent magnet rotor assembly is sleeved outside the rotor shaft. A number of permanent magnet blocks are symmetrically arranged on the outer periphery of the permanent magnet rotor assembly. At both ends of the permanent magnet blocks along the axial direction of the permanent magnet rotor assembly, there are non-magnetic protection discs for the permanent magnet blocks; The power generation control switch includes a solid-state relay I and a solid-state relay II; The power switch control system includes a circuit control board, a power supply positive electrode and a power supply negative electrode. The circuit control board is electrically connected to the detection position of the permanent magnet rotor through an optical medium detection signal line. The power supply positive electrode is electrically connected to the input end of the circuit control board and the solid-state relay I respectively. The output end of the circuit control board is electrically connected to the input ends of the solid-state relay I, the solid-state relay II and the power supply negative electrode respectively. The output end of the solid-state relay I is electrically connected to the solid-state relay II and the input end of the motor stator winding respectively. The input end of the solid-state relay II is electrically connected to the input end of the charging battery. The output ends of the motor stator winding and the charging battery are electrically connected to the power supply negative electrode respectively.

2. The combined permanent magnet self-induction generator motor according to claim 1, characterized in that The axial gap between the permanent magnet patches with the same polarity of the disc stator and the permanent magnet rotor is ≥5 mm.

3. The combined permanent magnet self-induction generating motor according to claim 2, characterized in that, The gap between the inner cavity of the radial stator and the outer wall of the non-magnetic protection disc of the rotor permanent magnet block is 1 mm.

4. The combined permanent magnet self-induction generator motor according to claim 3, characterized in that, Both ends of the rotor shaft are respectively inserted into the flange holes of the left flange and the right flange, and the left flange and the right flange are respectively fastened to both ends of the body.

5. The combined permanent magnet self-induction generating motor according to claim 4, characterized in that, There is a left flange bearing in the flange hole of the left flange, and a right flange bearing in the flange hole of the right flange. Both ends of the rotor shaft are respectively inserted into the bearing holes of the left flange bearing and the right flange bearing.

6. The combined permanent magnet self-induction generator motor according to claim 5, characterized in that There is a left bearing end cover outside the left flange bearing, and a right bearing end cover outside the right flange bearing. The left flange and the right flange are respectively fastened to both ends of the body through fastening bolts.

7. A combined permanent magnet self-induction generator motor according to any one of claims 1-6, characterized in that, The permanent magnet blocks are vertically installed along the axial direction of the rotor shaft between two adjacent non-magnetic protection discs of the permanent magnet blocks, and the magnetic field direction of each permanent magnet block is towards the direction of the rotor shaft.

8. A combined permanent magnet self-induction generator motor according to any one of claims 1-6, characterized in that, The working surface widths of the radial stator winding core and the disc stator winding core are equal, and the widths of the permanent magnet patches and the permanent magnet patches with the same polarity are equal.

9. A combined permanent magnet self-induction generating motor according to any one of claims 1-6, characterized in that, The winding cores and non-winding cores of the disc stator and the radial stator are equally made into 2, 4, 6, 8... N pairs, or 2, 3, 4, 5, 6, 7... N pairs.

10. A combined permanent magnet self-induction generating motor according to claim 9, characterized in that, When the winding cores and non-winding cores are equally made into 2, 4, 6, 8... N pairs, the number of mounting blocks of the permanent magnet blocks is 2, 4, 6, 8... N; when the winding cores and non-winding cores are equally made into 2, 3, 4, 5, 6, 7... N pairs, the number of mounting blocks of the permanent magnet blocks is 2, 3, 4, 5, 6, 7... N blocks.

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