CN111391635A - Dual-control motor power assembly and electric automobile - Google Patents
Dual-control motor power assembly and electric automobile Download PDFInfo
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- CN111391635A CN111391635A CN202010228008.9A CN202010228008A CN111391635A CN 111391635 A CN111391635 A CN 111391635A CN 202010228008 A CN202010228008 A CN 202010228008A CN 111391635 A CN111391635 A CN 111391635A
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- motor
- dual
- controller
- control
- gear box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
Abstract
The application relates to the technical field of power equipment, in particular to a dual-control motor power assembly and an electric automobile. Dual control motor power assembly, comprising: a gear case; the first motor is arranged on one side of the gear box, and an output shaft of the first motor is connected with an input shaft on one side of the gear box; the second motor is arranged on the other side of the gear box, and an output shaft of the second motor is connected with an input shaft on the other side of the gear box; wherein a phase angle of the first motor and the second motor is 180 °. In the dual-control motor power assembly in the application, the first motor and the second motor are arranged on two sides of the gear box, and the phase angle of the first motor and the phase angle of the second motor are 180 degrees, so that sound waves generated by the first motor and the second motor are mutually offset, and the noise of the dual-control motor power assembly is reduced.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to a dual-control motor power assembly and an electric automobile.
Background
In recent years, as an environmentally friendly vehicle, an electric vehicle such as a hybrid vehicle, an electric vehicle, and a fuel cell vehicle, which is mounted with a motor for driving the vehicle, has attracted attention.
At present, the noise of a power assembly of an electric automobile mainly comes from the noise of a controller, a motor and a gear box, and the source of the noise is mainly caused by electromagnetic excitation, gear meshing excitation, dynamic unbalance excitation and the like.
In the prior art, the body characteristics of a single motor, an electric control and a gear box are optimized through adjustment, or active noise control equipment is implanted into a whole vehicle to suppress and modulate noise. Because the electric assembly can produce very many different operating modes (torque, rotational speed all change) in real vehicle operation, noise and order also have the performance of different sound pressure amplitude at different frequency channels under torque, rotational speed change like this. This complex phenomenon makes it difficult for the prior art to fully optimize the electric powertrain at various objectives. Existing optimization methods often also result in a reduction and loss of efficiency, heat transfer, and other properties, and increased costs.
Disclosure of Invention
The application provides a dual control motor power assembly, first motor and second motor set up in the both sides of gear box, and the phase angle of first motor and second motor is 180 to the sound wave that makes first motor and second motor produce offsets each other, thereby reduces dual control motor power assembly's noise.
In order to achieve the above object, the present application provides a dual control motor powertrain, comprising:
a gear case;
the first motor is arranged on one side of the gear box, and an output shaft of the first motor is connected with an input shaft on one side of the gear box;
the second motor is arranged on the other side of the gear box, and an output shaft of the second motor is connected with an input shaft on the other side of the gear box;
wherein a phase angle of the first motor and the second motor is 180 °.
In the dual-control motor power assembly in the application, the output shaft of the first motor and the output shaft of the second motor are connected with the input shaft of the gear box, the phase angle of the first motor and the phase angle of the second motor are 180 degrees, so that the wave crests generated by the first motor correspond to the wave troughs generated by the second motor, the sound waves generated by the first motor and the second motor are offset with each other, and the noise of the dual-control motor power assembly is reduced.
Preferably, the first motor and the second motor are symmetrically arranged on two sides of the gear box.
Preferably, the motor further comprises a first controller electrically connected with the first motor and a second controller electrically connected with the second motor, wherein the current phase setting of the first controller and the current phase setting of the second controller are different by 180 degrees.
Preferably, the first controller and the second controller are symmetrically arranged.
Preferably, an input shaft of the gear box is provided with an internal spline or an external spline, and an output shaft of the first motor and an output shaft of the second motor are both provided with an external spline or an internal spline matched with the internal spline.
Preferably, the first motor and the second motor have the same structure.
Preferably, the first controller includes a box body, a mounting cavity is formed in the box body, an upper cover plate and a lower cover plate at the upper and lower ends of the mounting cavity, and a main EMC filter, a control board, a shielding plate, a power module, a discharge capacitor, a secondary EMC filter and a direct current capacitor are sequentially arranged in the direction of the lower cover plate from the upper cover plate.
Preferably, the gearbox comprises a secondary drive gear connected to the input shaft of the gearbox and first and second output shafts of the gearbox connected to the secondary drive gear.
The application also provides an electric automobile which is provided with the dual-control motor power assembly. The electric automobile adopting the dual-control motor power assembly has lower noise due to the reduction of the noise of the power assembly.
Drawings
FIG. 1 is a schematic structural diagram of a dual control motor powertrain according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating the mutual cancellation of peaks and troughs in a dual-control motor powertrain according to an embodiment of the present disclosure.
Icon: 1-a gear box; 10-the input shaft of the gearbox; 2-a first electric machine; 20-an output shaft of the first motor; 3-a second motor; 30-an output shaft of the second motor; 4-a first controller; 5-a second controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present application provides a dual-control motor powertrain, including:
a gear case 1;
the first motor 2 is arranged on one side of the gear box 1, and an output shaft 20 of the first motor is connected with an input shaft on one side of the gear box 1;
the second motor 3 is arranged on the other side of the gear box 1, and an output shaft 30 of the second motor is connected with an input shaft on the other side of the gear box 1;
wherein the phase angle of the first electric machine 2 and the second electric machine 3 is 180 °.
In the dual-control motor power assembly, the output shaft 20 of the first motor and the output shaft 30 of the second motor are connected with the input shaft 10 of the gear box, and the phase angle of the first motor 2 and the phase angle of the second motor 3 are 180 degrees, so that the wave crest generated by the first motor 2 corresponds to the wave trough generated by the second motor 3, and the sound waves generated by the two are mutually counteracted to reduce the noise of the dual-control motor power assembly.
As an alternative, the first motor 2 and the second motor 3 are symmetrically arranged on two sides of the gear box 1. By adopting the arrangement mode, the first motor 2 and the second motor 3 generate the same vibration during working, and the vibration of the first motor 2 and the vibration of the second motor 3 can be counteracted with each other, so that the dynamic balance between the first motor 2 and the second motor 3 is realized.
It should be noted that the first motor 2 and the second motor 3 have the same structure, that is, the first motor 2 and the second motor 3 have the same stator and rotor, the same rotating shaft and the same rotation, the motor type may be asynchronous motor or Permanent Magnet Synchronous Motor (PMSM), the stator and rotor of the motor adopt silicon steel sheet lamination as framework, permanent magnets are embedded in the rotor, and simultaneously, the two sides are also matched with rotary transformers to acquire signals such as torque, rotating speed and the like during the operation of the motor.
When in use, the phase angle difference of the rotors of the first motor 2 and the second motor 3 at two sides of the gear box 1 is set as
P is the number of pole pairs of the rotor. Thus, when the electromagnetic torque ripple and the electromagnetic force fluctuate, a phase angle is generated to counteract the torque ripple and the electromagnetic force. Torque ripple and electromagnetic excitation are the main factors that contribute to the generation of motor noise sources.
The specific operation mode is as follows:
one of the dual motors remains motionless.
The other controller is powered on to control the motor to operate
P is the number of pole pairs of the rotor.
After the second motor is rotated to the position, the current with the same amplitude on the first motor controller starts to rotate, and the current amplitude of the second motor is unchanged and continuously works.
As an alternative, a first controller 4 electrically connected with the first motor 2 and a second controller 5 electrically connected with the second motor 3 are further included, and the current phase settings of the first controller 4 and the second controller 5 are different by 180. By the arrangement mode, the difference between the wave crests and the wave troughs of the noise of the first controller 4 and the noise of the second controller 5 can be realized, so that the difference between the wave crests and the wave troughs is formed on the final sound pressure to weaken the noise.
During specific operation;
the first controller 4 and the second controller 5 output periodic sinusoidal current square waves and find out the period of the square waves in cyclic variation;
the phase of the first controller 4 or the second controller 5 is kept unchanged, the phase of the second controller 5 or the first controller 4 is shifted by 180 degrees, and the amplitude is kept unchanged;
so as to form square wave signals with consistent amplitude and opposite phases.
It should be noted that the first controller 4 and the second controller 5 adopt three-phase bridge PWM inversion, and the voltage inversion is realized by pulse width modulation to be sinusoidal current, and finally an approximate sinusoidal waveform is drawn up. The alternating current after the contravariant drives permanent-magnet motor through wire winding cutting magnetic induction line and rotates, produces electromagnetic excitation at this in-process to encourage the structure subassembly to produce vibration, finally produce the umbelliform noise of PWM, because the crest trough can offset each other, first controller 4 and 5 symmetrical settings of second controller realize the crest trough difference on the phase place of noise source electric current like this, thereby realize weakening the noise at the difference that forms the crest trough on last acoustic pressure.
As an optional mode, an input shaft 10 of the gearbox is provided with an internal spline or an external spline, and both the output shaft 20 of the first motor and the output shaft 30 of the second motor are provided with an external spline or an internal spline which is matched with the internal spline. Adopt the connected mode of spline, can make the connected mode between gear box 1 and first motor 2 and the second motor 3 more convenient on the one hand, on the other hand, the preparation mode technique of spline is relatively more mature, can reduce the cost of preparation.
As an optional mode, the first controller 4 includes a box, a mounting cavity is formed in the box, an upper cover plate and a lower cover plate at upper and lower ends of the mounting cavity, and a main EMC filter, a control board, a shielding plate, a power module, a discharge capacitor, a secondary EMC filter and a dc capacitor are sequentially arranged from the upper cover plate to the lower cover plate.
As an alternative, the gearbox 1 comprises a secondary transmission gear connected to the input shaft 10 of the gearbox and a first output shaft and a second output shaft of the gearbox 1 connected to the secondary transmission gear.
The application also provides an electric automobile which is provided with the dual-control motor power assembly. The electric automobile adopting the dual-control motor power assembly has lower noise due to the reduction of the noise of the power assembly.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A dual control motor powertrain, comprising:
a gear case;
the first motor is arranged on one side of the gear box, and an output shaft of the first motor is connected with an input shaft on one side of the gear box;
the second motor is arranged on the other side of the gear box, and an output shaft of the second motor is connected with an input shaft on the other side of the gear box;
wherein a phase angle of the first motor and the second motor is 180 °.
2. The dual control motor powertrain of claim 1, wherein the first motor and the second motor are symmetrically disposed on opposite sides of the gear box.
3. The dual-control-motor powertrain of claim 1, further comprising a first controller for electrical connection with the first motor and a second controller for electrical connection with the second motor, the first controller and the second controller having current phase settings that differ by 180 degrees.
4. The dual-control-motor powertrain of claim 3, wherein the first controller and the second controller are symmetrically disposed.
5. The dual control motor powertrain of claim 1, wherein the input shaft of the gearbox is provided with internal splines or external splines, and the output shaft of the first motor and the output shaft of the second motor are provided with external splines or internal splines that are engaged with the internal splines.
6. The dual-control-motor powertrain of claim 1, wherein the first motor and the second motor are identical in construction.
7. The dual-control motor powertrain of claim 3, wherein the first controller comprises a housing, a mounting cavity is formed in the housing, an upper cover plate and a lower cover plate are arranged at the upper end and the lower end of the mounting cavity, and a main EMC filter, a control board, a shielding plate, a power module, a discharge capacitor, a secondary EMC filter and a DC capacitor are sequentially arranged from the upper cover plate to the lower cover plate.
8. The dual control motor powertrain of claim 1, wherein the gearbox includes a secondary drive gear coupled to the input shaft of the gearbox and first and second output shafts of the gearbox coupled to the secondary drive gear.
9. An electric vehicle having a dual-control-motor powertrain according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228008.9A CN111391635A (en) | 2020-03-27 | 2020-03-27 | Dual-control motor power assembly and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228008.9A CN111391635A (en) | 2020-03-27 | 2020-03-27 | Dual-control motor power assembly and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111391635A true CN111391635A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010228008.9A Pending CN111391635A (en) | 2020-03-27 | 2020-03-27 | Dual-control motor power assembly and electric automobile |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206141298U (en) * | 2016-10-11 | 2017-05-03 | 比亚迪股份有限公司 | Vehicle drive -by -wire actuating mechanism , transaxle and electric automobile |
| CN108128131A (en) * | 2018-02-06 | 2018-06-08 | 浙江大学 | Electric vehicle distribution wheel side electric drive power assembly and method |
| CN207535676U (en) * | 2017-11-28 | 2018-06-26 | 成都雅骏新能源汽车科技股份有限公司 | A kind of electric vehicle bi-motor structure |
| CN109861480A (en) * | 2018-12-20 | 2019-06-07 | 珠海格力电器股份有限公司 | Monophase machine noise-reduction method, device, system and household appliance |
| JP2019149905A (en) * | 2018-02-28 | 2019-09-05 | ダイムラー・アクチェンゲゼルシャフトＤａｉｍｌｅｒ ＡＧ | Vehicle drive device |
-
2020
- 2020-03-27 CN CN202010228008.9A patent/CN111391635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206141298U (en) * | 2016-10-11 | 2017-05-03 | 比亚迪股份有限公司 | Vehicle drive -by -wire actuating mechanism , transaxle and electric automobile |
| CN207535676U (en) * | 2017-11-28 | 2018-06-26 | 成都雅骏新能源汽车科技股份有限公司 | A kind of electric vehicle bi-motor structure |
| CN108128131A (en) * | 2018-02-06 | 2018-06-08 | 浙江大学 | Electric vehicle distribution wheel side electric drive power assembly and method |
| JP2019149905A (en) * | 2018-02-28 | 2019-09-05 | ダイムラー・アクチェンゲゼルシャフトＤａｉｍｌｅｒ ＡＧ | Vehicle drive device |
| CN109861480A (en) * | 2018-12-20 | 2019-06-07 | 珠海格力电器股份有限公司 | Monophase machine noise-reduction method, device, system and household appliance |
Non-Patent Citations (1)
| Title |
|---|
| 郑显达等: "降低单相异步电动机振动噪声新方法的研究", 《嘉兴学院学报》 * |
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Application publication date: 20200710 |
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