CN113364156B - Additional rotor yoke groove type brushless electric excitation synchronous motor - Google Patents
Additional rotor yoke groove type brushless electric excitation synchronous motor Download PDFInfo
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- CN113364156B CN113364156B CN202110623288.8A CN202110623288A CN113364156B CN 113364156 B CN113364156 B CN 113364156B CN 202110623288 A CN202110623288 A CN 202110623288A CN 113364156 B CN113364156 B CN 113364156B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/04—Synchronous motors for single-phase current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention discloses an additional rotor yoke slot type brushless electric excitation synchronous motor, wherein a stator part of the motor comprises a stator iron core and a stator armature winding, and a rotor part of the motor comprises a rotor iron core, a rotating shaft, a rotor alternating current winding, a rotor direct current excitation winding, a magnetic conduction bridge and a rotary rectifier; the stator armature winding is arranged in stator slots uniformly formed in the stator core, the rotor alternating current winding is arranged in rotor yoke slots uniformly formed in the yoke of the rotor core, the rotor direct current excitation winding is wound on each rotor pole body of the rotor core, the rotor alternating current winding is connected with the rotor direct current excitation winding through a rotary rectifier, the magnetic bridge is arranged on the surfaces of each rotor pole shoe of the rotor core, each rotor pole body of the rotor core is provided with a rotor additional slot, and the magnetic bridge is communicated with the rotor yoke slots through the rotor additional slots. The brushless slip ring does not need to additionally add an exciter, can realize brushless excitation of the rotor excitation electromagnetic excitation motor, and can realize wide-range adjustment of output voltage.
Description
Technical Field
The invention belongs to the field of excitation synchronous motors, and particularly relates to a brushless electric excitation synchronous motor.
Background
For a rotor excited machine, the machine needs to be excited by brushes and slip rings. The brushes are rubbed against the rotating components for a long period of time, allowing for frequent maintenance and replacement of the brushes. Compared with a brush excitation motor, the brushless excitation motor has higher reliability and is more convenient to maintain. In the current brushless schemes, there are three main categories:
1. the exciting winding is arranged on the stator, so that brushless, such as an electric excitation claw pole motor, a double-salient pole electric excitation motor, a switch flux linkage motor and the like, can be conveniently realized;
2. the rotary armature type electric excitation motor and the rotary rectifier are added, and alternating current generated by an armature winding of the exciter is rectified by the rotary rectifier to excite the main generator, but the motor is long in axial direction, complex in structure and high in maintenance cost;
3. the exciting winding is arranged on the stator, the generated magnetic field is axial, the rotor is made of a whole ferromagnetic material, a magnetic conduction bridge is arranged, a rotating NS pole is formed on the rotor, the eddy current loss is large, the magnetic leakage phenomenon is obvious, and the excitation efficiency is low.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a brushless electro-magnetic synchronous motor with an additional rotor yoke part.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
the stator part of the motor comprises a stator iron core and a stator armature winding, and the rotor part of the motor comprises a rotor iron core, a rotating shaft, a rotor alternating-current winding, a rotor direct-current excitation winding, a magnetic conduction bridge and a rotary rectifier; the stator armature winding is arranged in stator slots uniformly formed in the stator core, the rotor alternating current winding is arranged in rotor yoke slots uniformly formed in the yoke of the rotor core, the rotor direct current excitation winding is wound on each rotor pole body of the rotor core, the rotor alternating current winding is connected with the rotor direct current excitation winding through a rotary rectifier, the magnetic bridge is arranged on the surfaces of each rotor pole shoe of the rotor core, each rotor pole body of the rotor core is provided with a rotor additional slot, and the magnetic bridge is communicated with the rotor yoke slots through the rotor additional slots.
Further, the stator part of the motor also comprises a stator exciting winding, the rotor alternating current winding and the stator exciting winding are designed to be the same pole pair number, and the stator armature winding and the rotor direct current exciting winding are designed to be the same pole pair number.
Further, direct current is introduced into the stator exciting winding, and a static additional magnetic field is established in the air gap; or alternating current is supplied, and an additional rotating magnetic field with different speed from the speed of the rotor is established in the air gap; the additional magnetic field cuts the rotor alternating current winding, induced potential is generated on the rotor alternating current winding, rotor direct current exciting current is provided for the rotor direct current exciting winding after rectification by the rotary rectifier, and the magnetic field generated by the rotor direct current exciting current induces the armature winding.
Further, the additional magnetic field induces a potential of 0V on the rotor dc excitation winding, and the magnetic field generated by the rotor excitation current of the rotor dc excitation winding induces a potential of 0V on the stator excitation winding.
Further, when no stator field winding is provided in the motor, the rotor ac winding is induced directly using the harmonic magnetic field as an additional magnetic field.
Further, the stator exciting winding and the stator armature winding are placed in the stator slots together, or the stator yoke slots are formed in the yoke portion of the stator core, and the stator exciting winding is placed in the stator yoke slots.
Further, the stator exciting winding adopts a concentrated winding or a distributed winding.
Further, the number of phases of the rotor alternating-current winding is arbitrarily designed, the induction potential of a magnetic field generated by current on the stator armature winding is 0V, and the rectification mode of the rotary rectifier is half-wave or full-wave.
Further, the rotor alternating-current winding is designed to be two-phase, the rectification mode of the rotary rectifier is half-wave, and the direction of a magnetic field generated by current on the rotor alternating-current winding is consistent with the direction of a magnetic field generated by current on the rotor direct-current excitation winding.
Further, the stator armature winding, the rotor alternating current winding and the rotor direct current excitation winding adopt concentrated windings or distributed windings.
The beneficial effects brought by adopting the technical scheme are that:
the invention omits a slip ring and an electric brush which are necessary for exciting the brush motor, realizes brushless excitation of the rotor exciting motor, omits two motors of an auxiliary exciter and an exciter which are needed to be added in the three-stage brushless synchronous motor, and reduces the volume of the motor. In addition, the rotor yoke part is grooved, so that the original structures of the rotor pole body and the pole shoe of the traditional electric excitation motor can be well reserved, and harmonic waves cannot be introduced due to structural changes.
Drawings
FIG. 1 is a schematic diagram of the structure of an additional rotor yoke slot type brushless electro-magnetic synchronous motor;
FIG. 2 is a schematic diagram of the magnetic field of the current-engaging induction stator armature winding in the DC field winding of the rotor;
FIG. 3 is a winding connection diagram of a current-engaging induction stator armature winding in a rotor DC field winding;
FIGS. 4-5 are schematic illustrations of two-phase rotor AC windings disposed in an electric machine;
FIG. 6 is a schematic diagram of the magnetic fields of the current-engaging induction stator armature windings in the rotor AC field winding;
FIG. 7 is a schematic diagram of an electric machine with stator field windings in stator yoke slots;
FIG. 8 is a schematic diagram of a motor construction for a square stator;
FIG. 9 is a schematic diagram of an electric machine with an increased number of additional slots in the rotor;
fig. 10 is a schematic diagram of a motor structure without stator field windings.
Description of the reference numerals: 1. a stator core; 2. a stator armature winding; 3. a stator excitation winding; 4. a stator groove; 5. a rotor core; 6. a rotating shaft; 7. a rotor alternating current winding; 8. rotor DC exciting winding; 9. a magnetically permeable bridge; 10. a rotor attachment groove; 11. a rotary rectifier; 12. a rotor pole piece; 13. a rotor pole body; 14 rotor yoke.
Detailed Description
The technical scheme of the present invention will be described in detail below with reference to the accompanying drawings.
The invention designs an additional rotor yoke groove type brushless electric excitation synchronous motor, as shown in figures 1-3, a stator part of the motor comprises a stator core 1, a stator armature winding 2 and a stator excitation winding 3, and a rotor part of the motor comprises a rotor core 5, a rotating shaft 6, a rotor alternating current winding 7, a rotor direct current excitation winding 8, a magnetic conduction bridge 9 and a rotary rectifier 11. The stator armature winding 2 is arranged in stator slots 4 uniformly formed in the stator core 1, the rotor alternating current winding 7 is arranged in rotor yoke slots uniformly formed in the rotor yoke 14, the rotor direct current excitation winding 8 is wound on each rotor pole body 13, the rotor alternating current winding 7 is connected with the rotor direct current excitation winding 8 through a rotary rectifier 11, the magnetic bridge is arranged on the surface of each rotor pole shoe 12, each rotor pole body 13 is provided with a rotor additional slot 10, and the magnetic bridge 9 is communicated with the rotor yoke slots through the rotor additional slots 10.
The rotor alternating current winding 7 and the stator exciting winding 3 are designed to be the same pole pair number, and the magnetic field generated by the current of the stator armature winding 2 and the rotor direct current exciting winding 8 is designed to be the same pole pair number. Direct current can be introduced into the stator exciting winding 3, and a static additional magnetic field is established in the air gap; alternating current can also be supplied to establish a rotating additional magnetic field in the air gap at a speed different from the speed of the rotor. The additional magnetic field cuts the rotor alternating current winding 7, induced potential is generated on the rotor alternating current winding 7, rotor direct current exciting current is provided for the rotor direct current exciting winding 8 after rectification by the rotary rectifier 11, and the magnetic field generated by the rotor direct current exciting current induces the armature winding 2, and the magnetic field direction is shown in figure 2. The output voltage of the motor can be controlled by changing the current in the stator exciting winding 3. The rotor additional slots 10 ensure that the additional magnetic field is not shorted through the rotor pole pieces.
The rotor alternating current winding 7 can be designed into any phase number, or the induction potential of the magnetic field generated by the current of the rotor alternating current winding 7 on the stator armature winding 2 can be designed to be 0V, and the rotor alternating current winding is excited only by the magnetic field generated by the current on the rotor direct current excitation winding by adopting half-wave rectification or full-bridge rectification. The armature winding 2 may also be induced by a magnetic field generated by a current flowing through the rotor ac winding. In this mode, the rectification mode of the rotary rectifier 11 is half-wave rectification, as shown in fig. 3. Two-phase rotor ac windings 7-1 and 7-2 are provided, as shown in fig. 4-5, the direction of the magnetic field generated by the current on the rotor ac windings is identical to the direction of the magnetic field generated by the current on the rotor dc excitation windings, and the armature winding 2 is induced together with the current generated by the rotor dc excitation windings, as shown in fig. 6.
When the stator exciting winding 3 is installed, the stator exciting winding and the stator armature winding 2 can be placed in the stator slot 4 together, or the stator exciting winding 3 can be placed by additionally and exclusively arranging a stator yoke slot, as shown in fig. 7. When the stator is square, it is shown in fig. 8.
As shown in fig. 9, the number of additional slots 10 of the rotor may be increased, and the number of magnetic bridges 9 will be increased. In fig. 9, the total number of the rotor additional slots 10 is 24, so that the stator exciting magnetic field can be prevented from being shorted.
As shown in fig. 10, when the stator exciting winding 3 is not provided in the motor, the rotor alternating current winding 7 is induced directly using the harmonic magnetic field as the additional magnetic field.
In the invention, the stator armature winding 2, the stator exciting winding 3, the rotor alternating current winding and the rotor direct current exciting winding adopt concentrated windings or distributed windings, and the form can be single-phase, double-phase, three-phase or more than three-phase, single-layer windings or double-layer windings.
The embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by the embodiments, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (10)
1. A brushless electric excitation synchronous motor with an additional rotor yoke part is characterized in that: the stator part of the motor comprises a stator iron core and a stator armature winding, and the rotor part of the motor comprises a rotor iron core, a rotating shaft, a rotor alternating current winding, a rotor direct current excitation winding, a magnetic conduction bridge and a rotary rectifier; the stator armature winding is arranged in stator slots uniformly formed in the stator core, the rotor alternating current winding is arranged in rotor yoke slots uniformly formed in the yoke of the rotor core, the rotor direct current excitation winding is wound on each rotor pole body of the rotor core, the rotor alternating current winding is connected with the rotor direct current excitation winding through a rotary rectifier, the magnetic bridge is arranged on the surfaces of each rotor pole shoe of the rotor core, each rotor pole body of the rotor core is provided with a rotor additional slot, and the magnetic bridge is communicated with the rotor yoke slots through the rotor additional slots.
2. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 1, wherein: the stator part of the motor also comprises a stator exciting winding, the rotor alternating current winding and the stator exciting winding are designed to be the same in pole pair number, and the stator armature winding and the rotor direct current exciting winding are designed to be the same in pole pair number.
3. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 2, wherein: direct current is introduced into the stator exciting winding, and a static additional magnetic field is established in the air gap; or alternating current is supplied, and an additional rotating magnetic field with different speed from the speed of the rotor is established in the air gap; the additional magnetic field cuts the rotor alternating current winding, induced potential is generated on the rotor alternating current winding, rotor direct current exciting current is provided for the rotor direct current exciting winding after rectification by the rotary rectifier, and the magnetic field generated by the rotor direct current exciting current induces the armature winding.
4. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 3, wherein: the induction potential of the additional magnetic field on the rotor direct current excitation winding is 0V, and the induction potential of the magnetic field generated by the rotor excitation current of the rotor direct current excitation winding on the stator excitation winding is 0V.
5. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 3, wherein: when no stator exciting winding is arranged in the motor, the harmonic magnetic field is directly used as an additional magnetic field to induce the rotor alternating current winding.
6. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 2, wherein: the stator exciting winding and the stator armature winding are arranged in the stator slots together, or the stator yoke slots are formed in the yoke part of the stator core, and the stator exciting winding is arranged in the stator yoke slots.
7. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 2, wherein: the stator exciting winding adopts concentrated winding or distributed winding.
8. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 1, wherein: the number of phases of the rotor alternating-current winding is arbitrarily designed, the induction potential of a magnetic field generated by current on the stator armature winding is 0V, and the rectification mode of the rotary rectifier is half wave or full wave.
9. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 8, wherein: the rotor alternating-current winding is designed to be two-phase, the rectification mode of the rotary rectifier is half-wave, and the direction of a magnetic field generated by current on the rotor alternating-current winding is consistent with that generated by current on the rotor direct-current excitation winding.
10. The additional rotor yoke slot type brushless electro-magnetic synchronous motor as claimed in claim 1, wherein: the stator armature winding, the rotor alternating current winding and the rotor direct current excitation winding adopt concentrated windings or distributed windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110623288.8A CN113364156B (en) | 2021-06-04 | 2021-06-04 | Additional rotor yoke groove type brushless electric excitation synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110623288.8A CN113364156B (en) | 2021-06-04 | 2021-06-04 | Additional rotor yoke groove type brushless electric excitation synchronous motor |
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| Publication Number | Publication Date |
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| CN113364156A CN113364156A (en) | 2021-09-07 |
| CN113364156B true CN113364156B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110623288.8A Active CN113364156B (en) | 2021-06-04 | 2021-06-04 | Additional rotor yoke groove type brushless electric excitation synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116054438B (en) * | 2023-01-13 | 2024-04-02 | 南京航空航天大学 | Stator slot multiplexing type induction excitation motor and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730997A (en) * | 2014-01-06 | 2014-04-16 | 南京航空航天大学 | Excitation integrated type brushless synchronous motor |
| CN105207438A (en) * | 2015-10-15 | 2015-12-30 | 东南大学 | Magnetic field modulation type stator-rotor mixed permanent magnet memory motor |
| CN111262411A (en) * | 2020-01-19 | 2020-06-09 | 东华大学 | Double-harmonic winding brushless excitation direct-current generator with wide voltage regulation range |
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2021
- 2021-06-04 CN CN202110623288.8A patent/CN113364156B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730997A (en) * | 2014-01-06 | 2014-04-16 | 南京航空航天大学 | Excitation integrated type brushless synchronous motor |
| CN105207438A (en) * | 2015-10-15 | 2015-12-30 | 东南大学 | Magnetic field modulation type stator-rotor mixed permanent magnet memory motor |
| CN111262411A (en) * | 2020-01-19 | 2020-06-09 | 东华大学 | Double-harmonic winding brushless excitation direct-current generator with wide voltage regulation range |
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| CN113364156A (en) | 2021-09-07 |
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