CN210380400U - Four-phase 4N/3N pole winding isolation type fault-tolerant electric excitation double salient motor - Google Patents
Four-phase 4N/3N pole winding isolation type fault-tolerant electric excitation double salient motor Download PDFInfo
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- CN210380400U CN210380400U CN201921229207.0U CN201921229207U CN210380400U CN 210380400 U CN210380400 U CN 210380400U CN 201921229207 U CN201921229207 U CN 201921229207U CN 210380400 U CN210380400 U CN 210380400U
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Abstract
The utility model relates to a four-phase 4N/3N pole winding isolated fault-tolerant electric excitation double-salient motor, which comprises a stator and a rotor, wherein armature windings and excitation windings are wound on the stator poles of the stator alternately, and a stator pole without windings is arranged between adjacent excitation windings to ensure that the adjacent excitation windings are physically isolated; armature windings, excitation windings and stator poles without windings on the stator are uniformly arranged on the stator poles; one end of the armature winding is led out and connected together, and the other end of the armature winding is connected between the two diodes of the full-bridge circuit. The utility model discloses a motor can produce the looks magnetic circuit of symmetry, and the electromagnetic force is balanced, reduces armature winding, and is mutual-inductive between the excitation winding, because the stator of a no winding in interval, has physical isolation between the looks and the phase, has avoided the turn-to-turn short circuit between the looks and the phase, increases the fault tolerance of motor, and the phase current is symmetrical. And a foundation is laid for better utilization of the power generation operation characteristics of the doubly salient motor.
Description
Technical Field
The utility model relates to a double salient pole motor, especially an isolated fault-tolerant electric excitation doubly salient pole motor.
Background
The electric excitation double salient pole motor has simple structure and flexible control, can conveniently adjust the air gap magnetic field intensity by changing the exciting current, can be used as a generator and also can be used as a motor to operate, has wide attention since the self-development, and is widely applied to occasions such as automobile driving and vehicle-mounted systems, airplane starting/generating systems, wind power generation and the like.
A permanent magnet double-salient pole motor is obtained on the basis of a switched reluctance motor, and a permanent magnet is used as an excitation source. The permanent magnet doubly salient motor is developed into an electro-magnetic doubly salient motor, and the electro-magnetic doubly salient motor reserves the advantages of simple structure, low cost and convenience in magnetic regulation of a switched reluctance motor rotor. The electro-magnetic doubly salient motor has the characteristics that: the 1 electric excitation adopts direct current excitation, the magnetic regulation is convenient, compared with a permanent magnet double salient pole motor, a permanent magnet does not exist, the cost of the motor is reduced, and the problem of demagnetization does not exist because the permanent magnet does not exist. 2 the armature winding and the exciting winding are all concentrated on the stator pole, the rotor pole has no winding, the rotor is formed by laminating silicon steel sheets, no coil and magnetic steel exist, and the motor has simple and reliable structure. All armature windings and excitation windings of the 3 electric excitation doubly salient motor are arranged on the stator, the motor is suitable for high-speed operation, and the windings are close to the shell and are easy to radiate heat. The 4-electric excitation double salient pole motor is convenient to adjust in excitation, the output voltage can be adjusted by changing the size of a direct-current excitation power supply, the output voltage is kept constant, a frequency converter is omitted, the structure of an external circuit is simple, the reliability of the double salient pole motor is improved, and the cost is reduced.
The double-salient-pole motor is generally applied to a large airplane starting/generating system, new energy power generation, a vehicle driving system and a fuel pump system, has multiphase redundancy fault-tolerant capability, and is suitable for the fields of aerospace, automobiles, wind power generation and the like with high requirements on reliability and power quality.
The excitation of the traditional doubly salient excitation motor generally adopts distributed excitation, and an excitation winding is wound on the stator poles of a plurality of doubly salient motors, so that the problem of asymmetric phase magnetic circuits exists, and the problem of uneven distribution of motor armature winding loss and rectifier bridge loss can be caused. Meanwhile, the motor rectification output voltage pulsation of the motor is increased. The armature winding and the excitation winding are alternately arranged on the stator pole, overlapping and mutual interference do not occur, the excitation winding and the armature winding are uniformly distributed on the stator pole to generate a symmetrical phase magnetic circuit, and the electromagnetic force is balanced. And the advantages of the traditional electro-magnetic doubly salient motor, convenient magnetic adjustment, simple structure, easy heat dissipation and high reliability are maintained.
Disclosure of Invention
The utility model discloses on traditional electric excitation doubly salient motor's basis, combine the body characteristic of doubly salient motor, a novel four-phase 4N 3N (N is the positive integer) winding isolated structure fault-tolerant electric excitation doubly salient motor, this motor produces the looks magnetic circuit of symmetry, the electromagnetic force is balanced, reduce armature winding, mutual inductance between the excitation winding, because stator that does not have the winding at interval, there is physical isolation between the looks and the phase, the interturn short circuit between the phase and the phase has been avoided, the fault-tolerance of motor is increased, the phase current symmetry. And a foundation is laid for better utilization of the power generation operation characteristics of the doubly salient motor.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
a four-phase 4N/3N pole winding isolation type fault-tolerant electric excitation doubly salient motor comprises a stator and a rotor, wherein armature windings and excitation windings are wound on stator poles of the stator alternately, and a stator pole without a winding is arranged between adjacent excitation windings to enable the adjacent excitation windings to be isolated physically, reduce phase-to-phase mutual inductance, avoid turn-to-turn short circuit, increase the fault tolerance of the motor, generate a symmetrical phase magnetic circuit and balance electromagnetic force.
Further, armature windings, exciting windings and stator poles without windings on the stator are uniformly arranged on the stator poles.
Furthermore, one end of the armature winding is led out and connected together, and the other end of the armature winding is connected between the two diodes of the full-bridge circuit.
The utility model adopts the above technical scheme, following beneficial effect has:
(1) turn-to-turn short circuit is avoided, and fault tolerance is greatly increased;
(2) the winding is simple to wind, easy to radiate and not easy to damage;
(3) the phase magnetic circuits are symmetrical, and the electric excitation is balanced;
(4) the wire diameter of the winding is increased, and the copper loss is reduced.
Drawings
FIG. 1 is a two-dimensional block diagram of an 12/9 configuration electrically excited synchronous machine;
FIG. 2 is a rectification circuit diagram of an 12/9 structure electrically excited synchronous motor;
FIG. 3 is a four-phase winding flux linkage simulation diagram;
FIG. 4 is a diagram of a four-phase winding back EMF simulation;
main symbol names in the drawings: z is a load connected with the rectifying circuit; LA1, LB1, LC1 and LD1 are respectively winding inductances of A phase, B phase, C phase and D phase of the electrically excited synchronous motor with 12/9 structure; d1, D2, D3, D4, D5, D6, D7 and D8 are rectifier circuit diodes; EA1, EB1, EC1 and ED1 are opposite potentials of an A phase, a B phase, a C phase and a D phase of the 12/9 structure electrically excited synchronous motor respectively; A. b, C, D are respectively the A phase, B phase, C phase and D phase armature windings of 12/9 electric excitation synchronous motor; f is 12/9 electrically exciting the synchronous machine field winding.
Detailed Description
The utility model discloses a novel four-phase 4N 3N (N is the positive integer) winding isolated structure fault-tolerant electricity excitation doubly salient motor has one set of armature winding and excitation winding on this motor stator pole, and excitation winding and the even distribution of armature winding are on the stator pole, and no winding is gone up to the rotor pole. The stator poles are uniformly arranged on the stator poles according to three conditions of armature windings, exciting windings and stator poles without windings. One end of the armature winding is led out and connected together, the other end of the armature winding is connected between two diodes of a full-bridge circuit, the A-phase winding is connected between the positive end of the diode D1 and the negative end of the diode D8, the B-phase winding is connected between the positive end of the diode D2 and the negative end of the diode D7, the C-phase winding is connected between the positive end of the diode D3 and the negative end of the diode D6, and the D-phase winding is connected between the positive end of the diode D4 and the negative end of the diode D39. In a traditional centralized excitation or distributed excitation mode, an armature winding and an excitation winding are wound on one stator pole at the same time, and compared with a traditional doubly salient pole motor, the distance between every two armature windings is large, and mutual inductance between the armature windings is reduced. In the same way, the mutual inductance between the field windings is reduced. Because a stator without a winding is arranged at intervals, physical isolation exists between phases, turn-to-turn short circuit between the phases is avoided, and the fault tolerance of the motor is improved. The exciting windings are uniformly distributed on the stator poles, the force applied to each armature winding is the same, a symmetrical phase magnetic circuit is generated, and the electromagnetic force is balanced. And the advantages of the traditional distributed excitation doubly salient motor, convenient magnetic adjustment, low cost and simple and reliable rotor structure are maintained. The utility model provides a motor produces the looks magnetic circuit of symmetry, and the electromagnetic force is balanced, and is mutual-inductive to reduce, the fault tolerance of greatly increased motor, phase current symmetry.
The utility model is suitable for a fault-tolerant electric excitation doubly salient motor of various 4N 3N (N is the positive integer) winding isolated structure will be described in detail the utility model technical scheme for the electric excitation doubly salient motor of four-phase 12/9 structure as an example below with the accompanying drawing:
the utility model provides a planar structure of the electric excitation doubly salient motor of four-phase 12/9 structure is shown in fig. 1, and stator 1, rotor 3 are the doubly salient pole structure, let in exciting current in exciting winding 4, produce the main field in the motor is inside. The armature winding 3 and the field winding 4 are evenly distributed on the stator poles. The armature windings 3, the excitation windings 4 and the stator poles without windings are uniformly arranged on the stator poles, and compared with a traditional double salient pole motor, the distance between every two armature windings is larger, and the mutual inductance between the armature windings is reduced. One end of the armature winding is led out and connected together, the other end of the armature winding is connected between two diodes of a full-bridge circuit, the A-phase winding is connected between the positive end of the diode D1 and the negative end of the diode D8, the B-phase winding is connected between the positive end of the diode D2 and the negative end of the diode D7, the C-phase winding is connected between the positive end of the diode D3 and the negative end of the diode D6, and the D-phase winding is connected between the positive end of the diode D4 and the negative end of the diode D39. In a traditional centralized excitation or distributed excitation mode, an armature winding and an excitation winding are wound on one stator pole at the same time, and compared with a traditional doubly salient pole motor, the distance between every two armature windings is large, and mutual inductance between the armature windings is reduced. In a similar way, mutual inductance between excitation windings is reduced, and physical isolation exists between phases due to the fact that a stator without windings is arranged at intervals, turn-to-turn short circuit between the phases is avoided, and fault tolerance of the motor is improved. The exciting windings are uniformly distributed on the stator poles, the force applied to each armature winding is the same, a symmetrical phase magnetic circuit is generated, and the electromagnetic force is balanced. And the advantages of the traditional distributed excitation doubly salient motor, convenient magnetic adjustment, low cost and simple and reliable rotor structure are maintained. The motor herein has four-phase armature windings present, respectively A, B, C, D. The negative electrodes of these four phases are X, Y, W, D, respectively. The winding pattern of the armature winding is shown in fig. 1. The armature winding and the excitation winding jointly form a novel double salient pole motor power generation system.
A rectification circuit of a power generation system corresponding to a 12/9-structure fault-tolerant electrically-excited doubly salient motor is shown in fig. 2, and is described by taking a full-bridge uncontrolled rectification circuit as an example, one end of an armature winding is led out and connected together, the other end of the armature winding is connected between two diodes of a full-bridge circuit, an a-phase winding is connected between a positive end of a diode D1 and a negative end of a diode D8, a B-phase winding is connected between a positive end of a diode D2 and a negative end of a diode D7, a C-phase winding is connected between a positive end of a diode D3 and a negative end of a diode D6, and a D-phase winding is connected between a positive end.
The initial position of the motor is shown in fig. 1, A, B, C, D four-phase flux linkage is shown in fig. 3, A, B, C, D four-phase counter potential is shown in fig. 4, and according to the connection mode of the windings and the diodes, the A, B, C, D four-phase winding outputs electric energy to the load when the rotor pole slides into the corresponding stator pole, that is, A, B, C, D four-phase winding counter potential is negative and outputs electric energy to the load.
The winding structure and the rectification mode are convenient to realize, simple in structure and good in application prospect.
Claims (3)
1. The utility model provides a four-phase 4N 3N pole winding isolated fault-tolerant electric excitation doubly salient motor, includes stator, rotor, its characterized in that: armature windings and excitation windings are alternately wound on stator poles of the stator, and a stator pole without windings is arranged between adjacent excitation windings at intervals, so that the adjacent excitation windings are physically isolated, the interphase mutual inductance is reduced, the turn-to-turn short circuit is avoided, the fault tolerance of the motor is improved, symmetrical phase magnetic circuits are generated, and the electromagnetic force is balanced.
2. The four-phase 4N/3N-pole winding isolated fault-tolerant electrically-excited doubly-salient machine of claim 1, wherein: armature windings, excitation windings and stator poles without windings on the stator are uniformly arranged on the stator poles.
3. The four-phase 4N/3N-pole winding isolated fault-tolerant electrically-excited doubly-salient machine of claim 1, wherein: one end of the armature winding is led out and connected together, and the other end of the armature winding is connected between the two diodes of the full-bridge circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229207.0U CN210380400U (en) | 2019-07-31 | 2019-07-31 | Four-phase 4N/3N pole winding isolation type fault-tolerant electric excitation double salient motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229207.0U CN210380400U (en) | 2019-07-31 | 2019-07-31 | Four-phase 4N/3N pole winding isolation type fault-tolerant electric excitation double salient motor |
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| CN210380400U true CN210380400U (en) | 2020-04-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299770A (en) * | 2019-07-31 | 2019-10-01 | 上海电力大学 | The four isolated fault-tolerant electric excitation biconvex electrode electric machines of the pole phase 4N/3N winding |
| CN113489203A (en) * | 2021-07-01 | 2021-10-08 | 南京航空航天大学 | Four-phase electro-magnetic doubly-salient motor |
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2019
- 2019-07-31 CN CN201921229207.0U patent/CN210380400U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299770A (en) * | 2019-07-31 | 2019-10-01 | 上海电力大学 | The four isolated fault-tolerant electric excitation biconvex electrode electric machines of the pole phase 4N/3N winding |
| CN113489203A (en) * | 2021-07-01 | 2021-10-08 | 南京航空航天大学 | Four-phase electro-magnetic doubly-salient motor |
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