CN109713818B - Radial magnetizing permanent magnet rotor double-pole type switch reluctance motor - Google Patents
Radial magnetizing permanent magnet rotor double-pole type switch reluctance motor Download PDFInfo
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Abstract
The invention discloses a radial magnetizing permanent magnet rotor multiple pole type switch reluctance motor, which comprises a stator and a rotor, wherein the rotor comprises a rotor body and rotor magnetic poles, the rotor magnetic poles are radially magnetized and uniformly distributed on the outer circumference of the rotor body according to N, S magnetic polarities, the stator comprises a stator yoke and stator magnetic poles, the stator magnetic poles are uniformly distributed on the inner circumference of the stator yoke, and the number of the stator magnetic poles is twice that of the rotor magnetic poles; the magnetic pole windings with equal turns, same wire diameter and consistent winding direction are wound on the magnetic poles of each stator in a concentrated way, the magnetic pole windings belonging to the same phase are connected with each other in sequence from the head end to the head end, the tail ends are connected with each other to form corresponding phase windings, and the two phase windings are respectively and independently powered through a single-phase H bridge. The A.B two-phase winding of the invention adopts independent A-phase H bridge and B-phase H bridge to supply power according to the first to fourth beats, and the electromagnetic mechanisms of the A.B two phases in any beat simultaneously generate dragging torque, so that all electromagnetic mechanisms of the motor do work by exerting force, and the efficiency and the power density of the motor are effectively improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a radial magnetizing permanent magnet rotor double-pole type switch reluctance motor.
Background
The stator and the rotor are switched reluctance motors with double-convex structures, and electromagnetic torque is generated according to the magnetic circuit reluctance minimum principle so as to convert electric energy into mechanical energy. The conventional two-phase switch reluctance motor has no self-starting capability, has a torque dead zone, has smaller efficiency and power density than those of a permanent magnet motor, and has influenced market prospect.
The patent application filed in 2018, 5 and 11 and named as a double-pole type multi-magnetic-pole two-phase switch reluctance motor and a power driving circuit solves the problem that the two-phase switch reluctance motor has no starting capability, and simultaneously expands the motor capacity in a multi-magnetic-pole structure mode, and compared with a common switch reluctance motor, the power density of the motor is lower than that of a permanent magnet motor, and the running efficiency of the motor is improved; compared with a double-pole type multi-magnetic pole two-phase switch reluctance motor, the double-pole type two-phase switch reluctance motor further improves the operation efficiency of the motor, and has higher power density, but the motor has a complex motor structure and production process because the rotor is an axially magnetized permanent magnet rotor and the stator and the rotor are of a left-right two-section structure, and meanwhile, the permanent magnet motor adopts an A-phase and B-phase alternate power supply mode to work, only one phase of electromagnetic mechanism generates dragging torque to do work in one working beat, the other phase of electromagnetic mechanism is idle, and the whole electromagnetic mechanism of the motor is not fully utilized in the working beat, so that the permanent magnet motor has the excellent characteristic of high power density.
Disclosure of Invention
In order to solve the technical problems, the invention provides the radial magnetizing permanent magnet rotor double-pole type switch reluctance motor which is simple in structure and high in working efficiency.
The technical scheme for solving the problems is as follows: the utility model provides a radial magnetization permanent magnet rotor doubly pole type switch reluctance motor, includes motor housing, stator, rotor, is equipped with A, B double-phase bipolar rotor position sensor on the end cover of motor housing non-output shaft one end, the rotor includes pivot, rotor core, and rotor core includes rotor body, rotor magnetic pole, and a plurality of rotor magnetic poles radially magnetize and evenly distributed on rotor body circumference according to N, S magnetic polarity, the stator includes stator winding, stator core, and stator core includes stator yoke and stator magnetic pole, evenly distributed has a plurality of stator magnetic poles on the stator yoke inner circumference, forms the stator groove between two adjacent stator magnetic poles, and stator magnetic pole number is the twice of rotor magnetic pole number; the pole windings with equal turns, same wire diameter and consistent winding direction are wound on the stator pole in a concentrated way, the pole windings of the same class A phase are sequentially connected with the head end, the tail end is connected with the tail end to form a phase A winding, the pole windings of the same class B phase are sequentially connected with the head end, the tail end is connected with the tail end to form a phase B winding, and the phase A winding and the phase B winding are respectively and independently powered through a phase A H bridge and a phase B H bridge.
The radial magnetizing permanent magnet rotor multiple pole type switch reluctance motor comprises the arc sections and the slope sections, wherein the arc sections of the rotor poles are equal to the stator poles in width, and the slope sections are equal to the stator slots in width.
The radial magnetizing permanent magnet rotor multiple pole type switch reluctance motor comprises first to fourth power tubes, wherein a collector electrode of the first power tube is connected with a power anode, an emitter electrode of the first power tube is connected with a collector electrode of the second power tube, an emitter electrode of the second power tube is connected with a power cathode, a collector electrode of the third power tube is connected with a power anode, an emitter electrode of the third power tube is connected with a collector electrode of the fourth power tube, an emitter electrode of the fourth power tube is connected with a power cathode, a head end of an A phase winding is connected between the emitter electrode of the first power tube and the collector electrode of the second power tube, a tail end of the A phase winding is connected between the emitter electrode of the third power tube and the collector electrode of the fourth power tube, and base electrodes of the first to fourth power tubes serve as control ends of the power tubes.
The radial magnetizing permanent magnet rotor doubly-pole type switch reluctance motor comprises fifth to eighth power tubes, wherein a collector electrode of the fifth power tube is connected with a positive electrode of a power supply, an emitter electrode of the fifth power tube is connected with a collector electrode of a sixth power tube, an emitter electrode of the sixth power tube is connected with a negative electrode of the power supply, a collector electrode of the seventh power tube is connected with the positive electrode of the power supply, an emitter electrode of the seventh power tube is connected with a collector electrode of the eighth power tube, an emitter electrode of the eighth power tube is connected with a negative electrode of the power supply, a head end of a B phase winding is connected between the emitter electrode of the fifth power tube and the collector electrode of the sixth power tube, a tail end of the B phase winding is connected between the emitter electrode of the seventh power tube and the collector electrode of the eighth power tube, and base electrodes of the fifth to eighth power tubes serve as control ends of the power tubes.
The radial magnetizing permanent magnet rotor double-pole type switch reluctanceThe motor is characterized in that the phase A H bridge and the phase B H bridge respectively supply power to the phase A winding and the phase B winding according to the sequence from the first beat to the fourth beat; one of the A-phase magnetic poles is selected and is denoted as A 11 Select A 11 The next stator pole in the clockwise direction, denoted B 11 The method comprises the steps of carrying out a first treatment on the surface of the Defining alignment of stator and rotor magnetic pole, namely that the central line of the circular arc section of the rotor magnetic pole is coincident with the central line of the stator magnetic pole, when A 11 The first power tube and the fourth power tube of the phase A H bridge are connected, the second power tube and the third power tube are disconnected, the sixth power tube and the seventh power tube of the phase B H bridge are connected, the fifth power tube and the eighth power tube are disconnected, the current direction of the phase A winding flows from the head end to the tail end, and the current direction of the phase B winding flows from the tail end to the head end; when B is 11 The first power tube and the fourth power tube of the phase A H bridge are aligned with the rotor N pole and enter a second beat, the second power tube and the third power tube are turned off, the fifth power tube and the eighth power tube of the phase B H bridge are turned on, the sixth power tube and the seventh power tube are turned off, the current direction of the phase A winding flows from the head end to the tail end, and the current direction of the phase B winding flows from the head end to the tail end; when A is 11 The second power tube and the third power tube of the phase A H bridge are aligned with the rotor S pole and enter a third beat, the first power tube and the fourth power tube are turned off, the fifth power tube and the eighth power tube of the phase B H bridge are turned on, the sixth power tube and the seventh power tube are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the head end to the tail end; when B is 11 The second power tube and the third power tube of the phase A H bridge are aligned with the rotor S pole and enter a fourth beat, the first power tube and the fourth power tube are turned off, the sixth power tube and the seventh power tube of the phase B H bridge are turned on, the fifth power tube and the eighth power tube are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the tail end to the head end; the first beat to the fourth beat are powered repeatedly, so that in any working beat, the electromagnetic mechanisms of A, B and the motor are simultaneously in a full-scale working state, and electromagnetic moments in the same rotation direction are generated by the electromagnetic mechanisms of A, B.
The radial magnetizing permanent magnet rotor double-pole type switch reluctance motor is characterized in that the rotor is an integrated rotor made of ferrite permanent magnet materials.
According to the radial magnetizing permanent magnet rotor double-pole type switch reluctance motor, the stator core is formed by laminating and fixedly pressing silicon steel sheets.
The radial magnetizing permanent magnet rotor double-pole type switch reluctance motor is characterized in that the rotating shaft is made of non-magnetic stainless steel.
The radial magnetizing permanent magnet rotor double-pole type switch reluctance motor is characterized in that the rotating shaft is made of common steel, and a magnetism isolating bushing is sleeved on the outer surface of the rotating shaft.
The invention has the beneficial effects that:
1. the rotor is an integrated rotor made of ferrite permanent magnet materials, magnetic poles of the rotor are magnetized in the radial direction, the magnetic poles are uniformly distributed on the outer circumference of the rotor according to N.S. and the magnetic energy utilization rate is high.
2. The A.B two-phase winding of the invention adopts independent A-phase H bridge and B-phase H bridge to supply power according to the first to fourth beats, and the electromagnetic mechanisms of the A.B two phases in any beat simultaneously generate dragging torque, so that all electromagnetic mechanisms of the motor do work by exerting force, and the efficiency and the power density of the motor are effectively improved.
3. In the invention, after the motor is excited by the power supply, the stator magnetic poles are distributed according to N.N.S.S.N.S.S. … …, the electromagnetic attraction force is generated by utilizing the slope sections of the rotor magnetic poles, the repulsive force in the same direction is generated by the arc sections, and the synthesized torque is large.
4. In the invention, the total pole arc width of the permanent magnet rotor magnet with the arc section and the slope section is the stator pole distance, and the problem that the two-phase motor has no starting capability is effectively solved.
Drawings
FIG. 1 is a schematic cross-sectional structure of an 8/4 pole radial magnetizing permanent magnet rotor double pole type switch-insert reluctance motor according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a 4-pole permanent magnet rotor of an 8/4-pole motor in accordance with an embodiment of the present invention.
Fig. 3 is a diagram of a.b. two-phase winding connection in an embodiment of the invention.
Fig. 4 is a circuit diagram of a motor power circuit in an embodiment of the invention.
FIG. 5 shows a first beat power (+I) in an embodiment of the invention A ,-I B ) And (5) a motor model diagram.
FIG. 6 is a second beat power (+I) in an embodiment of the invention A ,+I B ) And (5) a motor model diagram.
FIG. 7 shows a third beat power (-I) in an embodiment of the invention A, +I B ) And (5) a motor model diagram.
FIG. 8 shows a fourth beat power (-I) in an embodiment of the invention A, -I B ) And (5) a motor model diagram.
Fig. 9 is a schematic diagram of current commutation according to an embodiment of the present invention.
Wherein: 01 is a stator yoke, 02 is a stator pole, 03 is a pole winding, 04 is a rotor body, 05 is a rotor pole, 06 is a circular arc segment of the rotor pole, 07 is a ramp segment of the rotor pole, and 08 is a rotating shaft.
The symbol of the same name of the polar winding, a, b, c are the symbol of the head end of the polar winding, x, y, z are the symbol of the tail end of the polar winding, AX is the symbol of the A phase winding, and the current flowing from the A end is +I A On the contrary, negative current (-I) A ) BY is the B phase winding symbol, and the current flowing from the B end is +I B On the contrary, negative current (-I) B ),-indicating current flow in->-representing the current flow, τ is the pole pitch of the stator poles, α 1 Is the arc angle of the stator pole, also the arc angle (mechanical angle) of the rotor magnetic pole arc section, alpha 2 The arc angle is a stator slot arc angle and is also an arc angle (mechanical angle) of a rotor magnetic pole slope section; a is that 11 ，A 12 ，A 13 ，A 14 Is the label of four stator magnetic poles of A phase, B 11 ，B 12 ，B 13 ，B 14 Is the four stator pole labels for phase B.
Detailed Description
The invention is further described below with reference to the drawings and examples.
It should be noted that: the stator-rotor magnetic pole alignment described in the embodiment means that the center line of the circular arc section of the rotor magnetic pole coincides with the center line of the stator magnetic pole.
As shown in fig. 1, the radial magnetizing permanent magnet rotor double-pole type switch reluctance motor comprises a motor shell, a stator and a rotor, wherein a A, B two-phase bipolar rotor position sensor is arranged on an end cover at one end of a non-output shaft of the motor shell, the rotor comprises a rotating shaft 08 and a rotor iron core, the rotor iron core comprises a rotor body 04 and rotor magnetic poles 05, a plurality of rotor magnetic poles 05 are radially magnetized and uniformly distributed on the outer circumference of the rotor body 04 according to N, S magnetic polarities, the stator comprises a stator winding and a stator iron core, the stator iron core comprises a stator magnetic yoke 01 and stator magnetic poles 02, a plurality of stator magnetic poles 02 are uniformly distributed on the inner circumference of the stator magnetic yoke 01, stator grooves are formed between two adjacent stator magnetic poles 02, and the number of the stator magnetic poles is twice the number of the rotor magnetic poles; the magnetic pole windings 03 with equal numbers of turns, same wire diameter and consistent winding direction are intensively wound on each stator magnetic pole 02, the homonymous ends are denoted by 'x', the head end symbols of a and b are respectively marked, and the tail ends are respectively marked with x and y symbols (shown in figure 1); the magnetic pole windings of the same genus A phase are sequentially connected with the head end and the tail end to form an A phase winding AX, the magnetic pole windings of the same genus B phase are sequentially connected with the head end and the tail end to form a B phase winding BY, as shown in figure 3; the phase A winding and the phase B winding are independently powered through a phase A H bridge and a phase B H bridge respectively.
As shown in fig. 2, the pole arc of each rotor pole 05 is composed of an arc section and a slope section, the width of the arc section is equal to the width alpha of the stator pole 1 The width of the ramp section is equal to the width alpha of the stator slot 2 The position of the rotor ramp section on the rotor body 04 determines the rotational speed direction of the motor, and the fall between the points C and A of the ramp section is 0.5 to 0.8 mm.
As shown in fig. 4, the a-phase H-bridge includes a first power tube T1, a second power tube T2, a third power tube T3, and a fourth power tube T4, where the collector of the first power tube T1 is connected to the positive electrode of the power source, the emitter of the first power tube T1 is connected to the collector of the second power tube T2, the emitter of the second power tube T2 is connected to the negative electrode of the power source, the collector of the third power tube T3 is connected to the positive electrode of the power source, the emitter of the third power tube T3 is connected to the collector of the fourth power tube T4, the emitter of the fourth power tube T4 is connected to the negative electrode of the power source, the head end of the a-phase winding is connected between the emitter of the first power tube T1 and the collector of the second power tube T2, the tail end of the a-phase winding is connected between the emitter of the third power tube T3 and the collector of the fourth power tube T4, and the bases of the first to the fourth power tubes T4 serve as control ends of the power tubes.
As shown in fig. 4, the B-phase H-bridge includes a fifth power tube T5, a sixth power tube T6, a seventh power tube T7, and an eighth power tube T8, where the collector of the fifth power tube T5 is connected to the positive electrode of the power source, the emitter of the fifth power tube T5 is connected to the collector of the sixth power tube T6, the emitter of the sixth power tube T6 is connected to the negative electrode of the power source, the collector of the seventh power tube T7 is connected to the positive electrode of the power source, the emitter of the seventh power tube T7 is connected to the collector of the eighth power tube T8, the emitter of the eighth power tube T8 is connected to the negative electrode of the power source, the head end of the B-phase winding is connected between the emitter of the fifth power tube T5 and the collector of the sixth power tube T6, and the tail ends of the B-phase winding are connected between the emitter of the seventh power tube T7 and the collector of the eighth power tube T8, and the bases of the fifth to the eighth power tube T8 serve as control ends of the power tubes.
The phase A H bridge and the phase B H bridge respectively supply power to the phase A winding and the phase B winding according to the sequence from the first beat to the fourth beat; one of the A-phase magnetic poles is selected and is denoted as A 11 Select A 11 The next stator pole in the clockwise direction, denoted B 11 The method comprises the steps of carrying out a first treatment on the surface of the Defining alignment of stator and rotor magnetic pole, namely that the central line of the circular arc section of the rotor magnetic pole is coincident with the central line of the stator magnetic pole, when A 11 The first power tube T1 and the fourth power tube T4 of the phase A H bridge are aligned with the rotor N pole and enter a first beat, the second power tube T2 and the third power tube T3 are turned off, the sixth power tube T6 and the seventh power tube T7 of the phase B H bridge are turned on, the fifth power tube T5 and the eighth power tube T8 are turned off, the current direction of the phase A winding flows from the head end to the tail end, and the current direction of the phase B winding flows from the tail end to the head end; when B is 11 With rotor N poleAligning, entering a second beat, wherein the first power tube T1 and the fourth power tube T4 of the A-phase H bridge are conducted, the second power tube T2 and the third power tube T3 are turned off, the fifth power tube T5 and the eighth power tube T8 of the B-phase H bridge are conducted, the sixth power tube T6 and the seventh power tube T7 are turned off, the current direction of the A-phase winding flows from the head end to the tail end, and the current direction of the B-phase winding flows from the head end to the tail end; when A is 11 The second power tube T2 and the third power tube T3 of the phase A H bridge are aligned with the rotor S pole and enter a third beat, the first power tube T1 and the fourth power tube T4 are turned off, the fifth power tube T5 and the eighth power tube T8 of the phase B H bridge are turned on, the sixth power tube T6 and the seventh power tube T7 are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the head end to the tail end; when B is 11 The second power tube T2 and the third power tube T3 of the phase A H bridge are aligned with the rotor S pole and enter a fourth beat, the first power tube T1 and the fourth power tube T4 are turned off, the sixth power tube T6 and the seventh power tube T7 of the phase B H bridge are turned on, the fifth power tube T5 and the eighth power tube T8 are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the tail end to the head end; the first beat to the fourth beat are powered repeatedly, so that in any working beat, the electromagnetic mechanisms of A, B and the motor are simultaneously in a full-scale working state, and electromagnetic moments in the same rotation direction are generated by the electromagnetic mechanisms of A, B.
The rotor is an integrated rotor made of ferrite permanent magnet materials. The rotor core can also be manufactured by laminating and fixedly pressing silicon steel sheets, rare earth permanent magnets are radially distributed according to N.S and are surface-mounted on each rotor pole arc, and the rare earth permanent magnets can be radially distributed according to N.S and embedded into each rotor pole core, so that the efficiency and the power density of the motor are further improved.
The stator core is formed by laminating and fixedly pressing silicon steel sheets with the thickness of 0.5 mm.
The rotating shaft 08 is made of non-magnetic stainless steel, or common steel, and the outer surface of the rotating shaft is sleeved with a magnetism isolating bushing to prevent the permanent magnet rotor from magnetic leakage.
The working principle of the motor of the invention is as follows: the operation of a radial-magnetized permanent magnet rotor multiple-pole switched reluctance motor is described in terms of the duty cycle shown in fig. 5 to 8, taking an 8/4 pole motor as an example for simplicity.
The initial state of the motor is shown in fig. 5, the motor in the model in fig. 5 is in a stop state before power is not supplied, and the magnetic pole N of the permanent magnet rotor 1 N 2 ,S 1 S 2 Respectively with A phase magnetic pole A 11 A 13 And A 12 A 14 Aligned, after power is supplied, the motor rotates clockwise at the speed n (the position of the rotor slope section on the rotor body determines that the motor rotates clockwise), and the power is supplied to the motor according to the current commutation principle shown in fig. 9:
first beat, in initial state, and stator pole A 11 And rotor magnetic pole N 1 Aligned (other poles of phase A are aligned in the same way), phase A windings are provided for +I A B-phase winding supply-I B . The current direction in each pole winding has been marked in fig. 5-current flow in->-current flow), according to the right-hand spiral law and the law of electromagnetic force: b phase magnetic pole B 11 And B 13 Is of S magnetic polarity, B 12 And B 14 Is of N magnetic polarity, B 11 For N 1 ，B 12 For S 1 ，B 13 For N 2 And B 14 For S 2 Respectively generating electromagnetic attractive force in the clockwise direction; at the same time, phase A magnetic pole A 11 And A 13 Is of N magnetic polarity, A 12 And A 14 Is of S magnetic polarity, A 11 ，A 12 ，A 13 ，A 14 Respectively with N 1 ,S 1 ,N 2 And S is 2 In the rotor rotator with unbalanced stress, the four stator poles of A phase are respectively connected with the four magnetic poles of the rotor, and can also generate the repulsive electromagnetic force in the clockwise direction, and the electromagnetic force generated between all the magnetic poles of the stator and the rotor of the motor is in the clockwise direction, so that the electromagnetic torque is generated by synthesisThe motor rotor rotates clockwise until the B-phase pole is aligned with the rotor pole (at which time the rotor has rotated +.>As shown in fig. 6), the B-phase magnetic pole is aligned with the rotor magnetic pole, and the B-phase rotor position sensor sends out current commutation information, and enters a second beat.
In the second beat, the stator and rotor magnetic poles are positioned at the positions shown in FIG. 6, and the phase A winding is provided with +I A B phase winding supply +I B . The direction of current flow in each pole winding has been marked in fig. 6, as known from the right hand spiral rule and the law of electromagnetic force: a phase magnetic pole A 11 And A 13 Is of N magnetic polarity, A 12 And A 14 Is of S magnetic polarity, A 11 For S 2 ，A 12 For N 1 ，A 13 For S 1 ，A 14 For N 2 Respectively generating electromagnetic attractive force in the clockwise direction; at the same time, B phase magnetic pole B 11 And B 13 Is of N magnetic polarity, B 12 And B 14 Is of S magnetic polarity, B 11 ，B 12 ，B 13 ，B 14 Respectively with N 1 ，S 1 ，N 2 And S is 2 In the rotor rotating body with unbalanced stress, the four B-phase stator poles and the four rotor poles can generate the repulsive electromagnetic force in the clockwise direction, the electromagnetic force generated between all the motor stator poles and the motor rotor poles is in the clockwise direction, the electromagnetic torque is generated by synthesis, the motor rotor is dragged to rotate in the clockwise direction until the A-phase magnetic poles are aligned with the rotor poles (at the moment, the rotor rotates again)As shown in fig. 7), after the a-phase magnetic pole is aligned with the rotor magnetic pole, the a-phase rotor position sensor sends out current commutation information, and enters a third beat.
In the third beat, the stator and rotor magnetic poles are positioned in the position shown in figure 7, and the phase A winding supplies-I A B phase winding supply +I B . The direction of current flow in each pole winding has been marked in fig. 7The right-hand spiral rule and the electromagnetic force law can be used for obtaining that: b phase magnetic pole B 11 And B 13 Is of N magnetic polarity, B 12 And B 14 Is of S magnetic polarity, B 11 For S 2 ，B 12 For N 1 ，B 13 For S 1 ,B 14 For N 2 Respectively generating electromagnetic attractive force in the clockwise direction; at the same time, phase A magnetic pole A 11 And A 13 Is of S magnetic polarity, A 12 And A 14 Is of N magnetic polarity, A 11 ，A 12 ，A 13 ，A 14 Respectively with S 2 ，N 1 ，S 1 And N 2 In the rotor rotating body with unbalanced stress, the four A-phase magnetic poles and the four rotor magnetic poles can generate the same repulsive electromagnetic force in the clockwise direction, the electromagnetic forces generated between all the motor stator and rotor magnetic poles are clockwise, the electromagnetic torque is generated by synthesis, the motor rotor is dragged to rotate in the clockwise direction until the B-phase stator magnetic poles are aligned with the rotor magnetic poles (at the moment, the rotor rotates again)As shown in fig. 8), the B-phase stator pole is aligned with the rotor pole, and the B-phase rotor position sensor sends out current commutation information, and enters a fourth beat.
In the fourth beat, the stator and rotor magnetic poles are positioned at the positions shown in FIG. 8, and the A phase winding supplies-I A B-phase winding supply-I B . The direction of current flow in each pole winding has been marked in fig. 8, as known from the right hand spiral rule and the law of electromagnetic force: a phase magnetic pole A 11 And A 13 Is of S magnetic polarity, A 12 And A 14 Is of N magnetic polarity, A 11 For N 2 ，A 12 For S 2 ，A 13 For N 1 ,A 14 For S 1 Respectively generating electromagnetic attractive force in the clockwise direction; at the same time, B phase magnetic pole B 11 And B 13 Is of S magnetic polarity, B 12 And B 14 Is of N magnetic polarity, B 11 ，B 12 ，B 13 ，B 14 Respectively with S 2 ,N 1 ,S 1 And N 2 In the rotor rotating body with unbalanced stress, the four B-phase stator poles and the four rotor poles generate clockwise repulsive electromagnetic force, the electromagnetic force generated between all the motor stator poles and the motor rotor poles is clockwise, electromagnetic torque is generated by synthesis, and the motor rotor is dragged to rotate clockwise until the A-phase stator poles and the rotor poles are aligned. When the A-phase stator magnetic pole is aligned with the rotor magnetic pole, the A-phase position sensor sends out current commutation information. For the example 8/4 pole motor, after four current commutation beats, the motor rotor has rotated by one half, and the subsequent current commutation beats are sequentially repeated from the first beat to the fourth beat, and the motor continuously operates to convert the input electric energy into mechanical energy.
In this embodiment, the motor is an 8/4 pole motor, and the above scheme is also applicable to motors with two phases of unidirectional rotation, i.e. a two-segment structure of rotor pole arcs, in which the number of rotor poles of 12/6 poles, 16/8 poles, etc. is even, the number of stator poles is twice, and the self-starting capability is provided.
Claims (6)
1. A radial magnetizing permanent magnet rotor double pole type switch reluctance motor is characterized in that: the motor comprises a motor shell, a stator and a rotor, wherein a A, B two-phase bipolar rotor position sensor is arranged on an end cover at one end of the motor shell, which is not an output shaft, the rotor comprises a rotating shaft and a rotor iron core, the rotor iron core comprises a rotor body and rotor magnetic poles, a plurality of rotor magnetic poles are magnetized radially and uniformly distributed on the outer circumference of the rotor body according to N, S magnetic polarities, the stator comprises a stator winding and a stator iron core, the stator iron core comprises a stator magnetic yoke and stator magnetic poles, a plurality of stator magnetic poles are uniformly distributed on the inner circumference of the stator magnetic yoke, stator grooves are formed between two adjacent stator magnetic poles, and the number of the stator magnetic poles is twice that of the rotor magnetic poles; the magnetic pole windings with equal turns, same wire diameter and consistent winding direction are intensively wound on each stator magnetic pole, the magnetic pole windings belonging to the A phase are sequentially connected with the head end and the tail end to form an A phase winding, the magnetic pole windings belonging to the B phase are sequentially connected with the head end and the tail end to form a B phase winding, and the A phase winding and the B phase winding are respectively and independently powered through an A phase H bridge and a B phase H bridge;
the A-phase H bridge comprises first to fourth power tubes, a collector electrode of the first power tube is connected with a power supply positive electrode, an emitter electrode of the first power tube is connected with a collector electrode of the second power tube, an emitter electrode of the second power tube is connected with a power supply negative electrode, a collector electrode of the third power tube is connected with a power supply positive electrode, an emitter electrode of the third power tube is connected with a collector electrode of the fourth power tube, an emitter electrode of the fourth power tube is connected with a power supply negative electrode, a head end of an A-phase winding is connected between the emitter electrode of the first power tube and the collector electrode of the second power tube, a tail end of the A-phase winding is connected between the emitter electrode of the third power tube and the collector electrode of the fourth power tube, and base electrodes of the first to fourth power tubes serve as control ends of the power tubes;
the B-phase H bridge comprises fifth to eighth power tubes, a collector electrode of the fifth power tube is connected with a power supply positive electrode, an emitter electrode of the fifth power tube is connected with a collector electrode of the sixth power tube, an emitter electrode of the sixth power tube is connected with a power supply negative electrode, a collector electrode of the seventh power tube is connected with a power supply positive electrode, an emitter electrode of the seventh power tube is connected with a collector electrode of the eighth power tube, an emitter electrode of the eighth power tube is connected with a power supply negative electrode, a head end of a B-phase winding is connected between the emitter electrode of the fifth power tube and the collector electrode of the sixth power tube, a tail end of the B-phase winding is connected between the emitter electrode of the seventh power tube and the collector electrode of the eighth power tube, and base electrodes of the fifth to eighth power tubes serve as control ends of the power tubes;
the phase A H bridge and the phase B H bridge respectively supply power to the phase A winding and the phase B winding according to the sequence from the first beat to the fourth beat; one of the A-phase magnetic poles is selected and is denoted as A 11 Select A 11 The next stator pole in the clockwise direction, denoted B 11 The method comprises the steps of carrying out a first treatment on the surface of the Defining alignment of stator and rotor magnetic pole, namely that the central line of the circular arc section of the rotor magnetic pole is coincident with the central line of the stator magnetic pole, when A 11 Aligned with the rotor N pole, enters into the first beat, the first power tube and the fourth power tube of the A phase H bridge are conducted, the second power tube and the third power tube are turned off, the sixth power tube and the seventh power tube of the B phase H bridge are conducted, the fifth power tube and the eighth power tube are turned off, and the current direction of the A phase winding is from the head endThe current direction of the B phase winding flows from the tail end to the head end; when B is 11 The first power tube and the fourth power tube of the phase A H bridge are aligned with the rotor N pole and enter a second beat, the second power tube and the third power tube are turned off, the fifth power tube and the eighth power tube of the phase B H bridge are turned on, the sixth power tube and the seventh power tube are turned off, the current direction of the phase A winding flows from the head end to the tail end, and the current direction of the phase B winding flows from the head end to the tail end; when A is 11 The second power tube and the third power tube of the phase A H bridge are aligned with the rotor S pole and enter a third beat, the first power tube and the fourth power tube are turned off, the fifth power tube and the eighth power tube of the phase B H bridge are turned on, the sixth power tube and the seventh power tube are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the head end to the tail end; when B is 11 The second power tube and the third power tube of the phase A H bridge are aligned with the rotor S pole and enter a fourth beat, the first power tube and the fourth power tube are turned off, the sixth power tube and the seventh power tube of the phase B H bridge are turned on, the fifth power tube and the eighth power tube are turned off, the current direction of the phase A winding flows from the tail end to the head end, and the current direction of the phase B winding flows from the tail end to the head end; the first beat to the fourth beat are powered repeatedly, so that in any working beat, the electromagnetic mechanisms of A, B and the motor are simultaneously in a full-scale working state, and electromagnetic moments in the same rotation direction are generated by the electromagnetic mechanisms of A, B.
2. The radial magnetizing permanent magnet rotor doubly pole switched reluctance machine of claim 1, wherein: the pole arc of each rotor magnetic pole is composed of an arc section and a slope section, the width of the arc section is equal to the width of the stator magnetic pole, and the width of the slope section is equal to the width of the stator slot.
3. The radial magnetizing permanent magnet rotor doubly pole switched reluctance machine of claim 1, wherein: the rotor is an integrated rotor made of ferrite permanent magnet materials.
4. The radial magnetizing permanent magnet rotor doubly pole switched reluctance machine of claim 1, wherein: the stator core is formed by laminating and fixedly pressing silicon steel sheets.
5. The radial magnetizing permanent magnet rotor doubly pole switched reluctance machine of claim 1, wherein: the rotating shaft is made of non-magnetic stainless steel.
6. The radial magnetizing permanent magnet rotor doubly pole switched reluctance machine of claim 1, wherein: the rotating shaft is made of common steel, and the magnetism isolating bushing is sleeved on the outer surface of the rotating shaft.
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| CN110504811B (en) * | 2019-09-12 | 2023-07-18 | 山东大学 | Dislocation birotor magnetic flux switching type permanent magnet motor and power generation equipment |
| CN110855032B (en) * | 2019-11-27 | 2022-01-21 | 河南科技大学 | Single winding BL-BLDC topology with 8/4 slot pole ratio |
| CN110855031B (en) * | 2019-11-27 | 2022-01-21 | 河南科技大学 | Single-winding BL-BLDC control method with 8/4 slot pole ratio |
| CN113489204B (en) * | 2021-06-30 | 2022-05-27 | 陈树英 | Permanent magnet direct current motor |
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