CN111016615A - Dual-power-source electric drive assembly with load balancing device - Google Patents
Dual-power-source electric drive assembly with load balancing device Download PDFInfo
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- CN111016615A CN111016615A CN201911204120.2A CN201911204120A CN111016615A CN 111016615 A CN111016615 A CN 111016615A CN 201911204120 A CN201911204120 A CN 201911204120A CN 111016615 A CN111016615 A CN 111016615A
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
- B60K2006/266—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators with two coaxial motors or generators
Abstract
The invention provides a double-power-source electric drive assembly with a load balancing device, which can enlarge the torque range and the rotating speed range covered by the output of the electric drive assembly, improve the operation stability of an electric automobile and ensure the straight driving stability of the electric automobile. The double-power-source electric drive assembly comprises a load balancing device, so that the load torque difference transmitted from the wheels to the motors on the two sides can be reduced when a vehicle runs straight, and the wheel asynchrony caused by the rotating speed difference of the motors on the two sides can be reduced; when the vehicle is turned to carry out torque vector control, the output torque difference of the motors on two sides can be increased, the yaw moment is quickly generated, the side slip phenomenon which is difficult to control is prevented, and the operation stability of the vehicle is improved.
Description
Technical Field
The invention belongs to the technical field of hybrid vehicles, and particularly relates to a double-power-source electric drive assembly with a load balancing device.
Background
With the increasing production and conservation of automobiles in the world, severe environmental pollution caused by diesel vehicles and increasingly urgent global oil resource and energy crisis are caused, so that countries in the world have to actively search for vehicles using new energy. The electric vehicle has the advantages of no air pollution, low noise, wide electric energy source, high energy utilization rate, less heat radiation, convenient use and maintenance and the like, so that the popularization and the development of the technology of the electric vehicle are generally regarded and the electric vehicle is greatly successful. Because the electric automobile needs to face more and more complicated working condition road conditions, the requirements of users on the comfort level and the maneuverability of the automobile are higher and higher, and the torque range and the rotating speed range covered by the electric drive assembly in the mode of connecting a single power source with a speed reducer are not wide enough, so that the requirements of the users cannot be met. If a double-power-source double-drive assembly is adopted, namely a single-side power source is connected with a transmission to drive single-side wheels, two groups of driving units are symmetrically arranged, the requirement of high-rotating-speed and high-Torque output of the vehicle is met by means of a speed change mechanism, the driving force of the wheels at two sides can be actively adjusted when the vehicle turns, Torque vector (Torque vector) distribution is achieved, and the operation stability of the vehicle is improved. However, because the two groups of driving units are lack of mechanical connection, and because the motors on the two sides have difference due to manufacturing errors, the road surface load also has difference, so that the synchronization of the wheels on the two sides when the vehicle runs straight cannot be structurally ensured, and the control difficulty and the control fatigue degree of a driver are increased.
Disclosure of Invention
In view of this, the present invention provides a dual power source electric driving assembly with a load balancing device, which can expand the torque range and the rotation speed range covered by the output of the electric driving assembly, and can improve the operation stability of the electric vehicle and ensure the straight driving stability of the electric vehicle.
In order to achieve the purpose, the double-power-source electric drive assembly with the load balancing device comprises a left side motor (1), a right side motor (2), a load balancing device (3), a left side speed change mechanism (4) and a right side speed change mechanism (5);
the left side motor (1), the right side motor (2), the load balancing device (3), the left side speed change mechanism (4) and the right side speed change mechanism (5) are coaxially arranged; the output shaft of the left side motor (1) is connected with or integrated with the left side input shaft of the load balancing device (3), the output shaft of the right side motor (2) is connected with or integrated with the right side input shaft of the load balancing device (3), the left side output shaft of the load balancing device (3) is connected with or integrated with the input shaft of the left side speed change mechanism (4), and the right side output shaft of the load balancing device (3) is connected with or integrated with the input shaft of the right side speed change mechanism (5);
the left side speed change mechanism (4) and the right side speed change mechanism (5) have the same structure and are both set to be two-gear or multi-gear planetary speed change mechanisms.
Wherein the load balancing device (3) comprises two or three planet rows, and the structure has symmetry;
the load balancing device (3) has the input rotating speed and the output rotating speed which satisfy a relation a, and has the input torque and the output torque which satisfy a relation b:
x＝f(K)>1 (c)
wherein n isLinputAnd nRinputThe rotating speeds of a left input shaft and a right input shaft of the load balancing device are respectively set; n isLoutputAnd nRoutputThe rotating speeds of a left output shaft and a right output shaft of the load balancing device are respectively set; t isLinputAnd TRinputThe torques of the left input shaft and the right input shaft of the load balancing device are respectively; t isLoutputAnd TRoutputThe torques of a left output shaft and a right output shaft of the load balancing device are measured; k is the planet row parameter of the load balancing device;
and x (f) (k) is a function of the planet row parameters of the load balancing device and is determined by the structure of the load balancing device.
Has the advantages that:
the invention relates to a double-power-source electric drive assembly with a load balancing device, which comprises the load balancing device, and can reduce the load torque difference transmitted from wheels to motors on two sides when a vehicle runs straight and reduce the wheel asynchrony caused by the rotating speed difference of the motors on two sides; when the vehicle is turned to carry out torque vector control, the output torque difference of the motors on two sides can be increased, the yaw moment is quickly generated, the side slip phenomenon which is difficult to control is prevented, and the operation stability of the vehicle is improved.
Drawings
FIG. 1 is a schematic view of a dual power source electric drive assembly with a load balancing device according to the present invention.
Fig. 2 is a schematic view of a dual power source electric drive assembly with a load balancing device according to embodiment 1 of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention discloses a double-power-source electric drive assembly with a load balancing device, which comprises a left side motor 1, a right side motor 2, a load balancing device 3, a left side speed change mechanism 4 and a right side speed change mechanism 5;
the left side motor 1, the right side motor 2, the load balancing device 3, the left side speed change mechanism 4 and the right side speed change mechanism 5 are coaxially arranged; the output shaft of the left side motor 1 is connected with or integrated with the left side input shaft of the load balancing device 3, the output shaft of the right side motor 2 is connected with or integrated with the right side input shaft of the load balancing device 3, the left side output shaft of the load balancing device 3 is connected with or integrated with the input shaft of the left side speed change mechanism 4, and the right side output shaft of the load balancing device 3 is connected with or integrated with the input shaft of the right side speed change mechanism 5;
the left side speed change mechanism 4 and the right side speed change mechanism 5 have the same structure and are both set as two-gear or multi-gear planetary speed change mechanisms;
the load balancing device 3 comprises two or three planet rows, and the structure has symmetry;
the load balancing device 3 needs to satisfy a relation (a) between the input rotation speed and the output rotation speed, and needs to satisfy a relation (b) between the input torque and the output torque:
x＝f(K)>1 (c)
in the formula, nLinputAnd nRinputThe rotating speeds of a left input shaft and a right input shaft of the load balancing device are respectively set;
nLoutputand nRoutputThe rotating speeds of a left output shaft and a right output shaft of the load balancing device are respectively set; t isLinputAnd TRinputThe torques of the left input shaft and the right input shaft of the load balancing device are respectively; t isLoutputAnd TRoutputThe torques of a left output shaft and a right output shaft of the load balancing device are measured; k is the planet row parameter of the load balancing device; x is a function of the planet row parameters of the load balancing device, the specific function form of the planet row parameters is determined by the load balancing deviceThe structure is determined, but it must be guaranteed that x is greater than 1 when designing the load balancing apparatus.
From the formulae (b) (c):
from the formulae (a) (c):
it can be seen from the formula (d) that the load balancing device can change the torque difference between the input ends at two sides (connected with the output shafts of the motors at the corresponding sides) into 1/(2x-1) of the torque difference between the output ends at two sides (connected with the speed change mechanisms at the corresponding sides), and since x is greater than 1, the torque difference between the input ends at two sides of the load balancing device is smaller than the torque difference between the output ends at two sides of the load balancing device. It can be seen from the equation (e) that the load balancing device can change the rotation speed difference between the output ends at both sides of the load balancing device to 1/(2x-1) of the rotation speed difference between the input ends at both sides of the load balancing device, and since x is greater than 1, the rotation speed difference between the output ends at both sides of the load balancing device is smaller than the rotation speed difference between the input ends at both sides of the load balancing device. Therefore, the vehicle dual-power-source electric drive assembly with the load balancing device can structurally ensure that the wheels on two sides are synchronous when the vehicle runs straight.
It can be seen from the formula (d) that the load balancing device can make the torque difference of the output ends at both sides of the load balancing device become (2x-1) times of the torque difference of the input ends at both sides of the load balancing device, so that the load balancing device can increase the torque difference transmitted to the wheels generated by the motors at both sides and then transmitted to the wheels at both sides when the vehicle turns, and quickly generate a yaw moment couple, thereby preventing a side slip phenomenon which is difficult to control from occurring and improving the operation stability of the vehicle.
If one side wheel slips, the side load torque is zero and vehicle drive is provided solely by the drive torque on the other side. For a common double-power-source double-drive assembly, the driving output torque of the vehicle is completely provided by the motor on the corresponding side. However, in the dual-power-source electric drive assembly with the load balancing device provided by the invention, as shown in the formula (b), when the wheel on one side slips, the driving torque on the non-slipping side can be provided by x/(2x-1) on the corresponding side, and the motor on the other side can be provided by (x-1)/(2x-1), namely, the power requirement of a single motor is reduced.
In the load balancing device 3, the gear ring 11 of the left planet row is connected with the left input shaft, and the gear ring 21 of the right planet row is connected with the right input shaft; the left planet row planet carrier 12 is connected with the left output shaft, and the right planet row planet carrier 22 is connected with the right output shaft; the left planet row sun gear 13 is connected to the right planet row carrier 22, and the right planet row sun gear 23 is connected to the left planet row carrier 12.
In this embodiment, the load balancing apparatus 3 includes:
the relation between the input rotating speed and the output rotating speed of the load balancing device 3 is as follows:
the relation between the input torque and the output torque of the load balancing device 3 is as follows:
according to the formula (d) and (f), the load balancing device can change the torque difference of the input ends (connected with the output shafts of the motors on the corresponding sides) on the two sides into 1/(1+2/K) of the torque difference of the output ends (connected with the speed change mechanisms on the corresponding sides). The value range of the planet row parameters is 2-3 generally, and then the load balancing device 3 can reduce the torque difference of the input ends at two sides to 50% -60% of the torque difference of the output ends at two sides. It can be known from the formulas (e) and (f) that the load balancing device can reduce the rotation speed difference of the output ends at both sides to 50% -60% of the rotation speed difference of the input ends at both sides. Therefore, the vehicle dual-power-source electric drive assembly with the load balancing device can structurally ensure that the wheels on two sides are synchronous when the vehicle runs straight.
According to the formula (d) (f), the load balancing device can make the torque difference of the output ends at two sides become (1+2/K) times of the torque difference of the input ends at two sides. The value range of the planet row parameters is 2-3 generally, and then the load balancing device 3 can increase the torque difference of the output ends at two sides to be 1.67-2 times of the torque difference of the input ends at two sides. The load balancing device 3 can increase the torque difference transmitted to the wheels generated by the motors on both sides and then transmitted to the wheels on both sides when the vehicle turns, and quickly generate the yaw moment couple, thereby preventing the side slip phenomenon which is difficult to control from occurring and improving the operation stability of the vehicle.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A double-power-source electric drive assembly with a load balancing device is characterized by comprising a left motor (1), a right motor (2), a load balancing device (3), a left speed change mechanism (4) and a right speed change mechanism (5);
the left side motor (1), the right side motor (2), the load balancing device (3), the left side speed change mechanism (4) and the right side speed change mechanism (5) are coaxially arranged; the output shaft of the left side motor (1) is connected with or integrated with the left side input shaft of the load balancing device (3), the output shaft of the right side motor (2) is connected with or integrated with the right side input shaft of the load balancing device (3), the left side output shaft of the load balancing device (3) is connected with or integrated with the input shaft of the left side speed change mechanism (4), and the right side output shaft of the load balancing device (3) is connected with or integrated with the input shaft of the right side speed change mechanism (5);
the left side speed change mechanism (4) and the right side speed change mechanism (5) have the same structure and are both set to be two-gear or multi-gear planetary speed change mechanisms.
2. The dual-power-source electric drive assembly with load balancing device according to claim 1, characterized in that the load balancing device (3) comprises two or three planetary rows, the structure of which is symmetrical;
the load balancing device (3) has the input rotating speed and the output rotating speed which satisfy a relation a, and has the input torque and the output torque which satisfy a relation b:
x＝f(K)>1 (c)
wherein n isLinputAnd nRinputThe rotating speeds of a left input shaft and a right input shaft of the load balancing device are respectively set; n isLoutputAnd nRoutputThe rotating speeds of a left output shaft and a right output shaft of the load balancing device are respectively set; t isLinputAnd TRinputThe torques of the left input shaft and the right input shaft of the load balancing device are respectively; t isLoutputAnd TRoutputThe torques of a left output shaft and a right output shaft of the load balancing device are measured; k is the planet row parameter of the load balancing device; and x (f) (k) is a function of the planet row parameters of the load balancing device and is determined by the structure of the load balancing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204120.2A CN111016615B (en) | 2019-11-29 | 2019-11-29 | Dual-power-source electric drive assembly with load balancing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204120.2A CN111016615B (en) | 2019-11-29 | 2019-11-29 | Dual-power-source electric drive assembly with load balancing device |
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| CN111016615A true CN111016615A (en) | 2020-04-17 |
| CN111016615B CN111016615B (en) | 2020-12-15 |
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| CN201911204120.2A Active CN111016615B (en) | 2019-11-29 | 2019-11-29 | Dual-power-source electric drive assembly with load balancing device |
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| CN104986035A (en) * | 2015-06-18 | 2015-10-21 | 中国北方车辆研究所 | Dual-motor and double-planet-row power coupling transmission scheme optimization method |
| CN208306352U (en) * | 2018-06-15 | 2019-01-01 | 广州市新域动力技术有限公司 | The electric drive axle of double electric machine double row planetary gear differential mechanism |
| CN109263454A (en) * | 2018-10-23 | 2019-01-25 | 南京越博动力系统股份有限公司 | A kind of horizontal electric drive axle assembly system of bi-motor and shift control method |
| US10272765B1 (en) * | 2017-11-01 | 2019-04-30 | Hyundai Motor Company | Power transmission apparatus for a vehicle |
| CN209305331U (en) * | 2018-12-06 | 2019-08-27 | 赵彬 | A kind of bi-motor multi-speed transaxle |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986035A (en) * | 2015-06-18 | 2015-10-21 | 中国北方车辆研究所 | Dual-motor and double-planet-row power coupling transmission scheme optimization method |
| US10272765B1 (en) * | 2017-11-01 | 2019-04-30 | Hyundai Motor Company | Power transmission apparatus for a vehicle |
| CN208306352U (en) * | 2018-06-15 | 2019-01-01 | 广州市新域动力技术有限公司 | The electric drive axle of double electric machine double row planetary gear differential mechanism |
| CN109263454A (en) * | 2018-10-23 | 2019-01-25 | 南京越博动力系统股份有限公司 | A kind of horizontal electric drive axle assembly system of bi-motor and shift control method |
| CN209305331U (en) * | 2018-12-06 | 2019-08-27 | 赵彬 | A kind of bi-motor multi-speed transaxle |
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| CN111016615B (en) | 2020-12-15 |
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