CN110912303B - Starting generator of range extender of electric automobile - Google Patents
Starting generator of range extender of electric automobile Download PDFInfo
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- CN110912303B CN110912303B CN201911273974.6A CN201911273974A CN110912303B CN 110912303 B CN110912303 B CN 110912303B CN 201911273974 A CN201911273974 A CN 201911273974A CN 110912303 B CN110912303 B CN 110912303B
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/16—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention provides a starting generator of a range extender of an electric automobile, which comprises a rotating shaft, a rotor core, a main armature winding, an auxiliary armature winding, a permanent magnet and a stator core, and belongs to the technical field of automobile motor electric appliances. A rotor core is fixed on the shaft, 6X rotor poles are uniformly distributed on the circumference of the rotor core, the arc coefficient of the rotor poles is 0.5, and X is a positive integer; 8X stator poles are uniformly distributed on the stator iron core, and the arc coefficient of the stator poles is 0.667. 2 flat-bottom grooves with half openings are uniformly formed in the inner side of each stator pole, and the depth of each flat-bottom groove is 1/3 of that of each stator pole; the main armature winding and each auxiliary armature winding on the same stator pole form a one-phase armature winding in a series connection mode. Compared with the traditional motor, the starter generator of the range extender of the electric automobile reduces the torque pulsation of the motor by effectively supplementing the minimum value of the torque of the main armature winding by the torque of the auxiliary armature winding.
Description
Technical Field
A starting generator of an electric automobile range extender belongs to the technical field of automobile motor electric appliances.
Background
With the increasing shortage of petroleum energy and the increasing increase of environmental pollution all over the world, an electric automobile as a new energy automobile has become a key research project of automobile manufacturers, universities and research institutes all over the world.
Although the pure electric vehicle has the advantages of energy conservation, environmental protection and zero emission, the driving range is limited, and the electric vehicle cannot move forward if the electric energy of the storage battery is exhausted before the pure electric vehicle reaches a destination, and the storage battery is in urgent need of supplementing the electric energy. A generator set integrating an engine and a generator with high efficiency and low emission, namely a range extender, can quickly supplement electric energy for a storage battery and solve the problem of short driving range of a pure electric vehicle. The bottleneck problem restricting the wide application of the range extender is that a generator with high efficiency, high reliability and stable output voltage is lacked, but the generator which is matched with the automobile at present generally has the defects of small output power and low generating efficiency, and can not meet the use requirements of users. For example, the invention patent published in the Chinese patent gazette 2001, 8.8.8: voltage stabilization permanent magnet generator, application number: 00112053.0, publication No.: CN1307392 discloses a permanent magnet generator composed of a casing, a machine base, a power shaft, a rotor, a permanent magnet steel, a stator winding, a stator seat, a stator sliding sleeve, a balance spring, a rotation-proof connection screw, a sliding block, an adjusting rotating shaft, a positioning bearing, an adjusting rotating shaft driving mechanism and an automatic feedback control circuit, wherein the power rotating shaft is fixed on the machine base through the positioning bearing, the rotor is fixed on the power rotating shaft, one end of the stator sliding sleeve is fixed on the machine base, a through groove is axially arranged on the stator sliding sleeve, the balance spring is arranged in the stator sliding sleeve, one end of the spring is blocked by one end face of the stator sliding sleeve, the other end pushes against the sliding block arranged in the stator sliding sleeve, the sliding block is fixedly connected with the stator seat through the rotation-proof connection screw passing through the through groove of the sliding sleeve, the center of the sliding block is movably connected with one end of the adjusting rotating shaft through a screw thread, the detection signal input end of the automatic feedback control circuit is connected in parallel with the output end of the stator winding, and the control signal output end of the automatic feedback control circuit is connected to the controlled end of the driving mechanism. The voltage-stabilizing permanent magnet generator has a complex structure and high cost, and the use performance of the voltage-stabilizing permanent magnet generator is to be further improved.
The range-extended electric vehicle has a range extender, which generally comprises an engine and a generator, and is used for charging a power battery of the vehicle and directly driving a motor to operate. There are patent applications relating to range extenders for electric vehicles, e.g. application number
201610301847.2: the invention relates to a range extender of an electric vehicle, which uses a generator rotor as a flywheel and can realize ignition without additionally arranging the flywheel. However, the conventional range extender generator generally adopts an inner rotor structure, mainly comprising a rotor and a stator
The stators are arranged at the radial opposite positions, and the stator of the generator surrounds the rotor, so that the whole volume of the generator is large, and the weight is unbalanced
Big, the thermal diffusivity is strong.
In the patent of the invention disclosed, application numbers 201611220240.8: a range extender generator includes a motor housing, a motor rotor shaft, a rotor bearing and a stator assembly. The rotor assembly of the motor is arranged in the accommodating space and used for converting mechanical energy into electric energy, and the stator assembly is used for moving relative to the rotor assembly and converting the mechanical energy into the electric energy and outputting the electric energy to the power supply.
Because the doubly salient motor has the problem of large torque ripple, three defects of speed ripple, noise and vibration are generated, and the problem is always a bottleneck for hindering the development of the doubly salient motor. At present, scholars at home and abroad make a great deal of intensive research on how to suppress torque ripple, such as methods of adopting multiphase design, asymmetric stator design, rotor magnetic barrier offset and the like. However, the torque ripple suppression method is mainly used for a transverse lamination rotor having a plurality of magnetic barriers. It is desirable to design such machines to take into account a trade-off between electromagnetic and mechanical properties. In addition, most of the existing torque ripple suppression methods rely on finite element simulation, which is time consuming. Therefore, how to quickly, accurately and effectively reduce the harmonics of the torque to suppress the torque ripple is a direction of intensive research.
The motor adopts a double-salient-pole permanent magnet motor structure, absorbs the advantages of a permanent magnet motor and a switched reluctance motor, and simultaneously overcomes the problems of complex drive control, high cost, low utilization rate, pulsating noise and the like. The invention also forms a main armature winding and an auxiliary armature winding by opening a small groove in each stator pole of the motor, and reduces the problem of large torque pulsation by utilizing the torque generated by the auxiliary armature winding.
Disclosure of Invention
The technical problem to be solved is as follows: an electric vehicle range extender starter generator is provided that reduces edge effects and armature reaction.
A starting generator of an electric automobile range extender comprises a rotor core, a main armature winding, an auxiliary armature winding, a rotating shaft, a permanent magnet and a stator core; is characterized in that:
a rotor core is fixed on the shaft, 6X rotor poles are uniformly distributed on the circumference of the rotor core, the arc coefficient of the rotor poles is 0.5, and X is a positive integer;
the stator iron core is fixed on the motor shell, 8X stator poles are uniformly distributed on the stator iron core, and the stator pole arc coefficient is 0.667;
2 flat-bottom grooves with half openings are uniformly formed in the inner side of each stator pole, and the depth of each flat-bottom groove is 1/3 of that of each stator pole;
2 half-open flat-bottom slots equally divide the stator pole into three parts, and each part is a small tooth;
the main armature winding is formed by winding a large number of coil turns on a stator pole, and the coil winding spans a complete stator pole; each stator pole is provided with two auxiliary armature windings, and one auxiliary armature winding is wound in from a flat-bottom slot, spans a small tooth and is wound out from an armature slot between adjacent stator poles; the other auxiliary armature winding is wound in from the flat-bottom groove, spans two small teeth and is wound out from the armature groove, and the winding directions of the two auxiliary armature windings are the same.
The starter generator of the range extender of the electric vehicle as claimed in claim 1, characterized in that: the main armature winding and each auxiliary armature winding on the same stator pole form a one-phase armature winding in a series connection mode; sequentially splitting the armature winding along the circumferential direction into an A phase, a B phase, a C phase and a D phase, and circulating for 2X times.
The starter generator of the range extender of the electric vehicle as claimed in claim 1, characterized in that: the rotor is of a skewed pole structure.
The starter generator of the range extender of the electric vehicle as claimed in claim 1, characterized in that: the number of turns of the main armature winding coil is greater than the sum of the number of turns of the auxiliary armature winding coil, and the coil turn ratio of the main armature winding to the 2 auxiliary armature windings is 0.8: 0.15: 0.05.
the invention has the beneficial effects that:
1, the four-phase winding is adopted in the invention, so that the system can still maintain work even if a phase-lack fault exists, and the fault-tolerant capability is strong;
2, the windings are all centralized windings, so that the internal resistance is small (the copper consumption is low), and the efficiency is high;
3, torque pulsation can be effectively reduced;
4 the motor rotor has simple structure, not only improves the mechanical strength of the motor rotor, but also is more suitable for high-speed rotation.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a longitudinal sectional view of a starter generator of a range extender of an electric vehicle according to a first embodiment of the present invention. The permanent magnet motor comprises a permanent magnet 1, a permanent magnet 2, a main armature winding 3, a rotor core 4, a rotating shaft 5, an auxiliary armature winding 6 and a stator core.
FIG. 2 is a schematic diagram of the pole arc coefficient of the starter generator of the range extender of the electric vehicle.
Fig. 3 is a motor torque schematic.
Detailed Description
The invention provides a starter generator of a range extender of an electric vehicle, which is further described in detail by referring to the attached drawings and examples in order to make the technical scheme and the effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a longitudinal sectional view of a starter generator 1 of an electric vehicle range extender in a structure of an embodiment, wherein X =1 is taken in the embodiment. A starting generator of an electric automobile range extender is composed of a rotor core, a main armature winding, an auxiliary armature winding, a rotating shaft, a permanent magnet and a stator core; is characterized in that: a rotor core is fixed on the shaft, 6X rotor poles are uniformly distributed on the circumference of the rotor core, the arc coefficient of the rotor poles is 0.5, and X is a positive integer; the stator core is fixed on the motor shell, 8X stator poles are uniformly distributed on the stator core, and the stator pole arc coefficient is 0.667.
2 flat-bottom grooves with half openings are uniformly formed in the inner side of each stator pole, and the depth of each flat-bottom groove is 1/3 of that of each stator pole; 2 half-open flat-bottom slots equally divide the stator pole into three parts, and each part is a small tooth; the main armature winding is formed by winding a large number of coil turns on a stator pole, and the coil winding spans a complete stator pole; each stator pole is provided with two auxiliary armature windings, and one auxiliary armature winding is wound in from a flat-bottom slot, spans a small tooth and is wound out from an armature slot between adjacent stator poles; the other auxiliary armature winding is wound in from the flat bottom groove, spans two small teeth and is wound out from the armature groove, and the winding directions of the two auxiliary armature windings are the same; a starting generator of an electric automobile range extender is characterized in that a main armature winding and auxiliary armature windings on the same stator pole form a one-phase armature winding in a series connection mode; sequentially splitting the armature winding along the circumferential direction into an A phase, a B phase, a C phase and a D phase, and circulating for 2X times.
A starter generator of an electric automobile range extender is characterized in that: the rotor is of a skewed pole structure.
The utility model provides an electric automobile increases journey ware starter generator, main armature winding coil turns number is greater than the sum of auxiliary armature winding coil turns number, and the coil turns ratio of main armature winding and 2 auxiliary armature windings is 0.8: 0.15: 0.05.
FIG. 2 is a schematic diagram of the pole arc coefficient of the starter generator of the range extender of the electric vehicle. As shown in the figure, 6X rotor poles are uniformly distributed on the circumference of a rotor core, the arc coefficient of the rotor poles is 0.5, wherein X is a positive integer; the stator core is fixed on the motor shell, 8X stator poles are uniformly distributed on the stator core, and the stator pole arc coefficient is 0.667.
Fig. 3 is a schematic diagram of motor torque, and due to the characteristics of the reluctance motor, the torque generated by the main armature winding is in a slope shape, and the torque generated by the auxiliary armature winding can effectively supplement the minimum value of the torque slope, so that the torque ripple of the reluctance motor is reduced.
The starter generator of the range extender of the electric automobile has the following effects: the inner side of each stator pole of the motor is uniformly provided with 2 flat-bottom grooves with half openings, the depth of each flat-bottom groove is 1/3 of the depth of the stator pole, the flat-bottom groove is influenced by the torque of the reluctance motor, the torque generated by the armature winding is in a slope shape, the maximum value and the minimum value of the torque occur, the auxiliary armature winding is arranged to form another torque, at the moment, the torque vectors formed by the auxiliary armature winding and the main armature winding are added, the torque formed by the auxiliary armature winding can effectively compensate the minimum value of the torque of the main armature winding, and therefore the effect of reducing the motor edge effect is achieved.
Claims (4)
1. A starting generator of an electric automobile range extender comprises a rotor core, a main armature winding, an auxiliary armature winding, a rotating shaft, a permanent magnet and a stator core; the method is characterized in that:
a rotor core is fixed on the shaft, 6X rotor poles are uniformly distributed on the circumference of the rotor core, the arc coefficient of the rotor poles is 0.5, and X is a positive integer;
the stator iron core is fixed on the motor shell, 8X stator poles are uniformly distributed on the stator iron core, and the stator pole arc coefficient is 0.667;
2 flat-bottom grooves with half openings are uniformly formed in the inner side of each stator pole, and the depth of each flat-bottom groove is 1/3 of that of each stator pole;
2 half-open flat-bottom slots equally divide the stator pole into three parts, and each part is a small tooth;
the main armature winding is formed by winding a large number of coil turns on a stator pole, and the coil winding spans a complete stator pole; each stator pole is provided with two auxiliary armature windings, and one auxiliary armature winding is wound in from a flat-bottom slot, spans a small tooth and is wound out from an armature slot between adjacent stator poles; the other auxiliary armature winding is wound in from the flat-bottom groove, spans two small teeth and is wound out from the armature groove, and the winding directions of the two auxiliary armature windings are the same.
2. The starter-generator of the range extender of the electric vehicle as claimed in claim 1, wherein: the main armature winding and each auxiliary armature winding on the same stator pole form a one-phase armature winding in a series connection mode; sequentially splitting the armature winding along the circumferential direction into an A phase, a B phase, a C phase and a D phase, and circulating for 2X times.
3. The starter-generator of the range extender of the electric vehicle as claimed in claim 1, wherein: the rotor is of a skewed pole structure.
4. The starter-generator of the range extender of the electric vehicle as claimed in claim 1, wherein: the number of turns of the main armature winding coil is greater than the sum of the number of turns of the auxiliary armature winding coil, and the coil turn ratio of the main armature winding to the 2 auxiliary armature windings is 0.8: 0.15: 0.05.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273974.6A CN110912303B (en) | 2019-12-12 | 2019-12-12 | Starting generator of range extender of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273974.6A CN110912303B (en) | 2019-12-12 | 2019-12-12 | Starting generator of range extender of electric automobile |
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| CN110912303A CN110912303A (en) | 2020-03-24 |
| CN110912303B true CN110912303B (en) | 2021-09-24 |
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| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
| CN106899159B (en) * | 2017-05-10 | 2019-04-09 | 山东理工大学 | A kind of double △ winding alternating current generators |
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