A self-excited magnetically switched reluctance generator system

Abstract

This invention belongs to the field of generator systems and provides a self-excited switched reluctance generator system. The system includes: a generator stator and rotor, permanent magnets, a motor A-phase winding, a motor B-phase winding, a motor C-phase winding, and a controller. The generator stator and rotor include: a first stator core, a second stator core, a first output coil, an inner end plate, a bracket, a magnet slot, a second non-output coil, an outer end plate, a rotor core, and a motor shaft. This invention solves the problem of the switched reluctance generator failing to start under conditions without external excitation power by charging the capacitor within the controller using permanent magnets installed in the magnet slots. It also solves the problem of the switched reluctance generator system collapsing when a sudden load is applied, as the system capacitor voltage is pulled down to zero.

Description

Technical Field

[0001] The invention relates to the field of generator systems, and in particular to a self-excited magnetic switch reluctance generator system. Background Art

[0002] When the switched reluctance generator system builds voltage, an external power supply is required to provide initial excitation. After the voltage is built up, the switched reluctance generator system can generate electricity by itself.

[0003] When the switched reluctance generator system is used in vehicle operating conditions, there are some special operating conditions where the vehicle cannot provide the excitation power required to build up the voltage of the switched reluctance generator system, causing the system to fail to work properly. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a self-excited magnetic switched reluctance generator system to achieve self-excitation of the switched reluctance generator.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A self-excited magnetic switch reluctance generator system, comprising: a generator stator and rotor, permanent magnets, a motor A-phase winding, a motor B-phase winding, a motor C-phase winding and a controller; the generator stator and rotor comprise: a first stator core, a second stator core, a first coil at the output end, an inner end plate, a bracket, a magnetic steel slot, a second coil at the non-output end, an outer end plate, a rotor core and a motor shaft; the controller comprises: a capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode and an output;

[0007] The controller is connected to the winding lead wires in the stator and rotor of the generator; the first stator core is connected to the second stator core; the magnetic steel slots are evenly arranged on the second stator core; the first coil at the output end is arranged on the side of the first stator core away from the second stator core; the second coil at the non-output end is arranged on the side of the second stator core away from the first stator core; the rotor core is arranged at the lower part of the first stator core and the second stator core; the inner end plate and the outer end plate are respectively arranged at the two ends of the rotor core; the bracket is arranged at the lower side of the rotor core; the motor shaft passes through the bracket; the permanent magnet is arranged in the magnetic steel slot; the polarities of adjacent permanent magnets are opposite; the motor A phase winding, the motor B phase winding and the motor C phase winding are wound on the stator and rotor of the generator; the positive pole of the output, the first end of the capacitor, the collector of the first switch tube, the negative pole of the second diode, the collector of the third switch tube, the negative pole of the fourth diode, the negative pole of the fifth switch tube The collector and the cathode of the sixth diode are connected to each other; the cathode of the output, the second end of the capacitor, the anode of the first diode, the emitter of the second switch tube, the anode of the third diode, the emitter of the fourth switch tube, the anode of the fifth diode and the emitter of the sixth switch tube are connected to each other; the emitter of the first switch tube, the cathode of the first diode and the first end of the A phase winding of the motor are connected to each other; the collector of the second switch tube, the anode of the second diode and the second end of the A phase winding of the motor are connected to each other; the emitter of the third switch tube, the cathode of the third diode and the first end of the B phase winding of the motor are connected to each other; the anode of the fourth diode, the collector of the fourth switch tube and the second end of the B phase winding of the motor are connected to each other; the emitter of the fifth switch tube, the cathode of the fifth diode and the first end of the C phase winding of the motor are connected to each other; the collector of the sixth switch tube, the anode of the sixth diode and the second end of the C phase winding of the motor are connected to each other.

[0008] The present invention discloses the following technical effects:

[0009] The present invention provides a self-excited magnetic switched reluctance generator system. By arranging permanent magnets in magnetic steel slots to charge capacitors arranged in a controller, the problem that the switched reluctance generator cannot be excited under conditions without an external excitation power supply and the problem that the system capacitor voltage is pulled down to zero when a load is suddenly added to the switched reluctance power generation system, causing the entire switched reluctance power generation system to collapse, is solved, thereby realizing self-excitation of the switched reluctance generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0011] Figure 1 A schematic diagram of a self-excited magnetically switched reluctance generator system provided by an embodiment of the present invention;

[0012] Figure 2 An assembly diagram provided for an embodiment of the present invention;

[0013] Figure 3 An exploded view of components provided by an embodiment of the present invention;

[0014] Figure 4 A controller topology circuit diagram provided by an embodiment of the present invention;

[0015] Figure 5 A schematic diagram of a stator yoke without windings and embedding permanent magnets according to an embodiment of the present invention;

[0016] Figure 6 A schematic diagram of a winding stator yoke with a permanent magnet embedded therein provided in an embodiment of the present invention;

[0017] Figure 7 A curve diagram of the simulation results of the three-phase winding induced voltage provided by the embodiment of the present invention;

[0018] Figure 8 A curve diagram of bus capacitor DC voltage simulation results provided by an embodiment of the present invention;

[0019] Description of reference numerals:

[0020] 1-first stator core, 2-second stator core, 3-first coil at output end, 4-inner end plate, 5-bracket, 6-second coil at non-output end, 7-outer end plate, 8-rotor core, 9-motor shaft. DETAILED DESCRIPTION

[0021] 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.

[0022] The object of the present invention is to provide a self-excited magnetic switched reluctance generator system to achieve self-excitation of the switched reluctance generator.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 A schematic diagram of a self-excited magnetic switch reluctance generator system provided by an embodiment of the present invention, Figure 2 An assembly diagram provided for an embodiment of the present invention, Figure 3 An exploded diagram of components provided in an embodiment of the present invention, Figure 4 A controller topology circuit diagram provided by an embodiment of the present invention, such as Figures 1 to 4 As shown, the present invention provides a self-excited magnetic switch reluctance generator system, including: a generator stator and rotor, permanent magnets, a motor A-phase winding, a motor B-phase winding, a motor C-phase winding and a controller; the generator stator and rotor include: a first stator core 1, a second stator core 2, a first coil 3 at the output end, an inner end plate 4, a bracket 5, a magnetic steel slot, a second coil 6 at the non-output end, an outer end plate 7, a rotor core 8 and a motor shaft 9; the controller includes: a capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode and an output;

[0025] The controller is connected to the winding lead wire in the stator and rotor of the generator; the first stator core 1 is connected to the second stator core 2; the magnetic steel slots are evenly arranged on the second stator core 2; the output end first coil 3 is arranged on the side of the first stator core 1 away from the second stator core 2; the non-output end second coil 6 is arranged on the side of the second stator core 2 away from the first stator core 1; the rotor core 8 is arranged at the lower part of the first stator core 1 and the second stator core 2; the inner end plate 4 and the outer end plate 7 are respectively arranged at the two ends of the rotor core 8; the bracket 5 is arranged on the lower side of the rotor core 8; the motor shaft 9 passes through the bracket 5; the permanent magnet is arranged in the magnetic steel slot; the polarities of adjacent permanent magnets are opposite; the motor A phase winding, the motor B phase winding and the motor C phase winding are wrapped on the stator and rotor of the generator; the positive pole of the output, the first end of the capacitor, the collector of the first switch tube, the negative pole of the second diode, the collector of the third switch tube, the negative pole of the fourth diode The cathode of the output, the second end of the capacitor, the anode of the first diode, the emitter of the second switch tube, the anode of the third diode, the emitter of the fourth switch tube, the anode of the fifth diode and the emitter of the sixth switch tube are connected to each other; the emitter of the first switch tube, the cathode of the first diode and the first end of the A phase winding of the motor are connected to each other; the collector of the second switch tube, the anode of the second diode and the second end of the A phase winding of the motor are connected to each other; the emitter of the third switch tube, the cathode of the third diode and the first end of the B phase winding of the motor are connected to each other; the anode of the fourth diode, the collector of the fourth switch tube and the second end of the B phase winding of the motor are connected to each other; the emitter of the fifth switch tube, the cathode of the fifth diode and the first end of the C phase winding of the motor are connected to each other; the collector of the sixth switch tube, the anode of the sixth diode and the second end of the C phase winding of the motor are connected to each other.

[0026] Furthermore, the construction process of the self-excited magnetic switch reluctance generator is as follows:

[0027] Slotting at specific positions of a stator yoke of a conventional switched reluctance generator;

[0028] Magnetizing the permanent magnets to form specific paired magnetic poles;

[0029] The permanent magnets are embedded in the slots opened in the stator yoke;

[0030] The stator embedded with permanent magnets is laminated with the stator of the conventional switched reluctance generator;

[0031] The laminated stator is assembled with the rectangular coil;

[0032] The rotor is consistent with the traditional switched reluctance generator;

[0033] The winding lead wire is connected to the switched reluctance generator controller.

[0034] Preferably, a specific magnetic circuit is formed between the stator, the rotor, and the permanent magnet, and the magnetic circuit passes through the winding to form a magnetic flux. When the rotor rotates, the changing magnetic flux induces an electric potential in the winding; the diode in the controller performs uncontrolled rectification on the induced electric potential, outputs a certain amount of direct current, and stores it in the capacitor of the controller; the direct current in the capacitor is used to complete the voltage building of the switched reluctance generator, thereby completing self-excitation.

[0035] Specifically, during the first operation, the generator is dragged by the engine to the rated speed. The magnetic field generated by the permanent magnets on the stator will pass through the rotor. The rotor is in the form of a salient pole. During the rotation of the rotor, the strength of the entire magnetic field will change, and the magnetic flux in the winding will change. An induced potential will be generated at both ends of the winding, which will be rectified uncontrolled by the diode in the controller to form direct current stored in the capacitor.

[0036] Further, a three-phase switched reluctance generator with 18 stator teeth and 12 rotor teeth is used as an example to illustrate that 6 evenly spaced slots are opened in the stator yoke of a section of the core, the permanent magnets are magnetized in the broadside direction, and the N and S poles are arranged alternately to form a 6-pole magnetic field. At a certain moment, the magnetic field distribution in the stator and rotor is referenced to Figure 5 ; Put the three-phase winding on the stator teeth in sequence, refer to Figure 6 ; When the rotor rotates at a fixed speed, the back electromotive force induced in the three-phase winding is as follows Figure 7 After being rectified by the diode in the controller, the DC voltage of the controller capacitor is as follows Figure 8 As shown; when the capacitor of the controller has a certain voltage, the self-excitation of the switched reluctance generator can be achieved.

[0037] The beneficial effects of the present invention are as follows:

[0038] The present invention solves the problem that the switched reluctance generator cannot be excited under the condition of no external excitation power supply by arranging permanent magnets in the magnetic steel slots to charge the capacitor arranged in the controller, and also solves the problem that when the switched reluctance power generation system is suddenly loaded, the system capacitor voltage is pulled down to zero, causing the entire switched reluctance power generation system to collapse.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A self-excited magnetic switch reluctance generator system, characterized in that: include: Generator stator and rotor, permanent magnet, motor A-phase winding, motor B-phase winding, motor C-phase winding and controller; The stator and rotor of the generator include: a first stator core, a second stator core, a first coil at the output end, an inner end plate, a bracket, a magnetic steel slot, a second coil at the non-output end, an outer end plate, a rotor core and a motor shaft; the controller includes: a capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode and an output; The controller is connected to the winding lead wires in the stator and rotor of the generator; the first stator core and the second stator core are connected; the magnetic steel slots are evenly arranged on the second stator core; the first coil at the output end is arranged on the side of the first stator core away from the second stator core; the second coil at the non-output end is arranged on the side of the second stator core away from the first stator core; the rotor core is arranged at the lower part of the first stator core and the second stator core; the inner end plate and the outer end plate are respectively arranged at the two ends of the rotor core; the bracket is arranged at the lower side of the rotor core; the motor shaft passes through the bracket; the permanent magnet is arranged in the magnetic steel slot; the polarities of adjacent permanent magnets are opposite; the motor A phase winding, the motor B phase winding and the motor C phase winding are wrapped on the stator and rotor of the generator; the positive pole of the output, the first end of the capacitor, the collector of the first switch tube, the negative pole of the second diode, the collector of the third switch tube The cathode of the fourth diode, the collector of the fifth switch tube and the cathode of the sixth diode are connected to each other; the cathode of the output, the second end of the capacitor, the anode of the first diode, the emitter of the second switch tube, the anode of the third diode, the emitter of the fourth switch tube, the anode of the fifth diode and the emitter of the sixth switch tube are connected to each other; the emitter of the first switch tube, the cathode of the first diode and the first end of the A phase winding of the motor are connected to each other; the collector of the second switch tube, the anode of the second diode and the second end of the A phase winding of the motor are connected to each other; the emitter of the third switch tube, the cathode of the third diode and the first end of the B phase winding of the motor are connected to each other; the anode of the fourth diode, the collector of the fourth switch tube and the second end of the B phase winding of the motor are connected to each other; the emitter of the fifth switch tube, the cathode of the fifth diode and the first end of the C phase winding of the motor are connected to each other; The collector of the sixth switch tube, the anode of the sixth diode and the second end of the C-phase winding of the motor are connected to each other.

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