Five-phase permanent magnet switched reluctance motor

Abstract

The invention belongs to the technical field of reluctance motors, and particularly relates to a five-phase permanent magnet switch reluctance motor which comprises a stator support, a rotor, an angle sensor and a motor shaft, a winding is installed on the stator support, and the winding is composed of a stator iron core and an electromagnetic coil wound on the stator iron core; an angle sensor is installed on the side face of the motor shaft, the angle sensor is connected with the motor shaft through a linkage mechanism, the angle sensor and the motor shaft are electrically connected with a controller, and the electromagnetic coil is electrically connected with the controller and controlled by the controller. Five-phase multi-group arrangement can be achieved according to actual use conditions, the stepping angle is reduced, when an angle sensor detects that tooth poles do not reach the vertical direction of the windings, electromagnetic force of the windings is magnetic attraction force relative to permanent magnets on the tooth poles, and when the tooth poles reach the angle of the vertical direction of the windings, electromagnetic force of the windings is magnetic attraction force relative to permanent magnets on the tooth poles. The electromagnetic direction of the winding is changed by changing the electrifying direction of the winding through the control system, and magnetic pulling force is changed into repulsive force.

Description

Technical Field

[0001] The present invention relates to the technical field of reluctance motors, and in particular to a five-phase permanent magnet switched reluctance motor. Background Art

[0002] Most of today's reluctance motors are three-phase and simple to control, while four-phase control is complex and has smaller pulsation. Five-phase reluctance motors are relatively rare. In addition, our motor is based on the traditional reluctance motor and adds permanent magnets to each tooth pole of the rotor. Compared with the traditional reluctance motor, it uses the principle that the magnetic flux always closes along the path with the least magnetic resistance, thereby generating magnetic pull.

[0003] In traditional reluctance belt motors, when the tooth pole reaches the vertical direction of the winding, the current of this phase winding needs to be disconnected, resulting in a decrease in transmission efficiency. Therefore, we proposed a five-phase permanent magnet switched reluctance motor to solve the above problem. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a five-phase permanent magnet switched reluctance motor, which solves the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A five-phase permanent magnet switched reluctance motor comprises a stator support, a mover, an angle sensor, and a motor shaft. The stator support is mounted with a winding, the winding consisting of a stator core and an electromagnetic coil wound thereon. An angle sensor is mounted on the side of the motor shaft, the angle sensor and the motor shaft are connected via a linkage mechanism, the angle sensor and the motor shaft are electrically connected to a controller, and the electromagnetic coils are electrically connected to and controlled by the controller.

[0009] The controller includes a central processing unit, a display screen, a filtering circuit, a current detection circuit, an AC-DC conversion circuit, a voltage stabilizing circuit, a driving circuit, an interface circuit and a current transformer. The power supply is connected to the AC-DC conversion circuit through the filtering circuit, and after conversion by the AC-DC conversion circuit, it is connected to the voltage stabilizing circuit, and then connected to the driving circuit through the current transformer. The current transformer is connected to the input end of the current detection circuit, the output end of the current transformer is connected to the central processing unit, the output end of the driving circuit is connected to the electromagnetic coil, the control end of the driving circuit is connected to the central processing unit, the display screen is connected to the central processing unit, and the central processing unit is connected to the angle sensor.

[0010] Furthermore, the electromagnetic coil is composed of coils wound on both sides of the stator core of the concave structure, and the angle sensor is fixed to the motor shaft through a special connection structure.

[0011] Furthermore, the windings are arranged in five-phase groups, and the five electromagnetic coils form a group, forming a five-phase control.

[0012] Furthermore, a permanent magnet is installed on the mover.

[0013] Furthermore, the controller is electrically connected to detect the rotation angle of the motor in real time.

[0014] Furthermore, the central processing unit is a single chip microcomputer or a programmable controller, and a dedicated program needs to be written into the central processing unit.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a five-phase permanent magnet switched reluctance motor with the following beneficial effects:

[0017] The present invention can arrange five phases in multiple groups according to actual usage conditions to reduce the step angle. At the same time, the five phases of the motor work simultaneously. In addition, the permanent magnets installed on the rotor of the motor combine the characteristics of the permanent magnet motor and the switched reluctance motor. When the angle sensor of the reluctance motor detects that the tooth pole has not reached the vertical direction of the winding, the electromagnetic force of the winding is a magnetic attraction force relative to the permanent magnet on the tooth pole. When the tooth pole reaches the angle in the vertical direction of the winding, the control system changes the winding power supply direction to change the electromagnetic direction of the winding, changing the magnetic pull force to repulsion, thereby ensuring that each phase is working at all times and having high transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 2 Schematic diagram of the system principle of the present invention.

[0020] In the figure: 1. Stator bracket; 2. Stator core; 3. Stator core; 4. Winding; 5. Permanent magnet; 6. Mover; 7. Motor shaft; 8. Controller; 9. Angle sensor; 80. Central processing unit; 81. Filter circuit; 82. AC-DC conversion circuit; 83. Voltage stabilization circuit; 84. Drive circuit; 85. Current transformer; 86. Display screen; 87. Electromagnetic coil; 88. Angle sensor. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] like Figure 1-2 As shown, a five-phase permanent magnet switched reluctance motor proposed in one embodiment of the present invention includes a stator bracket 1, a mover 6, angle sensors 9, 88 and a motor shaft 7. A winding 4 is mounted on the stator bracket 1, and the winding 4 consists of a stator core 2 and electromagnetic coils 3, 87 wound thereon; angle sensors 9, 88 are mounted on the side of the motor shaft 7, and the angle sensors 9, 88 are connected to the motor shaft 7 through a linkage mechanism. The angle sensors 9, 88 and the motor shaft 7 are electrically connected to a controller 8, and the electromagnetic coils 3, 87 are both electrically connected to the controller 8 and are controlled by it;

[0024] The controller 8 includes a central processing unit 80, a display screen 86, a filter circuit 81, a current detection circuit, an AC-DC conversion circuit 82, a voltage stabilizing circuit 83, a drive circuit 84, an interface circuit and a current transformer 85. The power supply is connected to the AC-DC conversion circuit 82 through the filter circuit 81. After conversion by the AC-DC conversion circuit 82, it is connected to the voltage stabilizing circuit 83, and then connected to the drive circuit 84 through the current transformer 85. The current transformer 85 is connected to the input end of the current detection circuit, and the output end of the current transformer 85 is connected to the central processing unit 80. The output end of the drive circuit 84 is connected to the electromagnetic coils 3 and 87. The control end of the drive circuit 84 is connected to the central processing unit 80. The display screen 86 is connected to the central processing unit 80. The central processing unit 80 is connected to the angle sensors 9 and 88. The controller 8 uses an intelligent i pm module.

[0025] Angle sensors 9 and 88 are connected to the motor main shaft 7 through gears or synchronous belts. When the angle sensors 9 and 88 of our reluctance motor detect that the tooth pole has not reached the vertical direction of the winding, the electromagnetic force of the winding is a magnetic attraction relative to the permanent magnet on the tooth pole. When the tooth pole reaches the angle in the vertical direction of the winding, the control system changes the direction of power supply to the winding to change the electromagnetic direction of the winding, from magnetic attraction to repulsion, thereby ensuring that each phase is working at all times. Compared with the traditional reluctance motor's phase-missing operation, the torque is greater under the same volume.

[0026] like Figure 1As shown, in some embodiments, the electromagnetic coils 3 and 87 are composed of coils wound on both sides of the stator core 2 of the concave structure, and the angle sensors 9 and 88 are fixed to the motor shaft 7 through a special connection structure.

[0027] like Figure 1 As shown, in some embodiments, the winding 4 is arranged in five-phase multiple groups, and the five electromagnetic coils 3 and 87 constitute a group, forming a five-phase control, which reduces the step angle. For five-phase six groups or more combinations, since the winding works in both directions, the step angle can be 360° / (5*6) / (2*5)=1.2° (5*6 is five-phase six groups, 360° divided by 5*6 is the angle per phase, and 2*5 is the number of times the motor winding changes direction per phase cycle), and the control is more precise.

[0028] like Figure 1 As shown, in some embodiments, a permanent magnet 5 is installed on the mover 6, and the installed permanent magnet combines the characteristics of a permanent magnet motor and a switched reluctance motor.

[0029] like Figure 1-2 As shown, in some embodiments, it is electrically connected to the controller 8 to detect the angle of rotation of the motor in real time.

[0030] like Figure 2 As shown, in some embodiments, the central processing unit 80 is a single chip microcomputer or a programmable controller, and a dedicated program needs to be written into the central processing unit 80.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A five-phase permanent magnet switched reluctance motor, comprising a stator support (1), a mover (6), an angle sensor (9, 88) and a motor shaft (7), characterized in that: A winding (4) is mounted on the stator support (1), and the winding (4) is composed of a stator core (2) and an electromagnetic coil (3, 87) wound thereon; an angle sensor (9, 88) is mounted on the side of the motor shaft (7), and the angle sensor (9, 88) is connected to the motor shaft (7) through a linkage mechanism; the angle sensor (9, 88) and the motor shaft (7) are electrically connected to a controller (8), and the electromagnetic coils (3, 87) are both electrically connected to the controller (8) and are controlled by it; The controller (8) includes a central processing unit (80), a display screen (86), a filter circuit (81), a current detection circuit, an AC-DC conversion circuit (82), a voltage stabilizing circuit (83), a drive circuit (84), an interface circuit and a current transformer (85). The power supply is connected to the AC-DC conversion circuit (82) through the filter circuit (81). After conversion by the AC-DC conversion circuit (82), the power supply is connected to the voltage stabilizing circuit (83), and then connected to the drive circuit (84) through the current transformer (85). The current transformer (85) is connected to the input end of the current detection circuit. The output end of the current transformer (85) is connected to the central processing unit (80). The output end of the drive circuit (84) is connected to the electromagnetic coil (3, 87). The control end of the drive circuit (84) is connected to the central processing unit (80). The display screen (86) is connected to the central processing unit (80), and the central processing unit (80) is connected to the angle sensor (9, 88).

2. A five-phase permanent magnet switched reluctance motor according to claim 1, characterized in that: The electromagnetic coils (3, 87) are respectively wound on both sides of a stator core (2) with a concave structure, and the angle sensors (9, 88) are fixed to the motor shaft (7) via a special connection structure.

3. The five-phase permanent magnet switched reluctance motor according to claim 1, characterized in that: The windings (4) are arranged in five-phase groups, and the five electromagnetic coils (3, 87) form a group, forming a five-phase control.

4. The five-phase permanent magnet switched reluctance motor according to claim 1, characterized in that: A permanent magnet (5) is mounted on the mover (6).

5. The five-phase permanent magnet switched reluctance motor according to claim 1, characterized in that: The controller (8) is electrically connected to detect the rotation angle of the motor in real time.

6. The five-phase permanent magnet switched reluctance motor according to claim 1, characterized in that: The central processing unit (80) is a single chip microcomputer or a programmable controller, and a dedicated program needs to be written into the central processing unit 80.

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