CN108859733A - A kind of electric car, hub motor and hub motor differential speed system - Google Patents
A kind of electric car, hub motor and hub motor differential speed system Download PDFInfo
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- CN108859733A CN108859733A CN201810912512.3A CN201810912512A CN108859733A CN 108859733 A CN108859733 A CN 108859733A CN 201810912512 A CN201810912512 A CN 201810912512A CN 108859733 A CN108859733 A CN 108859733A
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- hub motor
- wheel hub
- electric machine
- machine controller
- controller
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- 239000003507 refrigerant Substances 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000009699 differential effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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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
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
Abstract
The present invention relates to a kind of electric car, hub motor and hub motor differential speed system, system includes left wheel hub motor, left controller, right hub motor, right controller and DC power supply；The DC terminal of left controller is used to receive the direct current of DC power supply and is exported by exchanging end to left wheel hub motor after being converted to alternating current, and the DC terminal of right controller is used to receive the direct current of DC power supply and is exported by exchanging end to right hub motor after being converted to alternating current；The DC terminal of left controller and the DC terminal of right controller are serially connected with DC power supply.Thus, the input current of left controller and right controller keeps balance, input voltage is then mutually divided as the revolving speed of two hub motors is different, the revolving speed of hub motor of the invention is determined by actual road conditions and angle of turn completely, without calculating, Unequal distance traveling can be made in the form of pure rolling by meeting both sides hub motor, reduce the friction of tire and ground.
Description
Technical field
The present invention relates to motor control technology fields, specifically, being to be related to a kind of electric car, hub motor and wheel hub
Motor electronic differential system.
Background technique
In order to reduce energy consumption, reduce environmental pollution, using clean energy resource as power, there is no pollution, zero-emission
Electric car more and more attention has been paid to.In-wheel motor driving formula electric car is with its simple mechanical transmission structure, higher drive
Many advantages, such as efficiency of movement, cheap cost, has become the hot spot of research.The driving method of existing electric car is using center
Motor adds mechanical drive mode mechanical differential gear box or hub motor to add electronic software differential mechanism.
Although mechanical differential gear box can be realized perfect differential, guarantee that left and right hub motor is rotated with different revolving speeds, full
Sufficient both sides hub motor makees Unequal distance traveling in the form of pure rolling as far as possible, reduces the friction of tire and ground.But due to
It has complicated mechanical transmission mechanism, leads to that structure is complicated, and car body weight increases, and has machine driving loss.
Electronic software differential mechanism is according to information such as onboard sensor steering angles collected, according to the information of acquisition by controlling
Device makes calculating, obtains the revolving speed of left and right hub motor, carries out differential control, left and right hub motor to left and right hub motor respectively
Revolving speed calculated determination.But since the road surface of electric automobile during traveling is all not smooth-riding surface, there is the case where hollow
It is more, and electronic software differential mechanism can not acquire practical information of road surface, thus, often due to the factor of ground injustice leads to automobile
Tire cannot make Unequal distance traveling in the form of pure rolling always, not increase the friction on tire and ground usually on ground.
Summary of the invention
The purpose of the present invention is to provide a kind of hub motor differential speed system, solves mechanical differential gear box and electronics is poor
Fast device.
In order to solve the above technical problems, the present invention is achieved by the following scheme：
A kind of hub motor differential speed system, including the first left wheel hub motor, the first left wheel hub electric machine controller, the first right wheel
Hub motor, the first right wheel hub electric machine controller and DC power supply；The DC terminal of the first left wheel hub electric machine controller is used
It exports in the direct current for receiving the DC power supply and after being converted to alternating current by exchanging end to first left wheel hub
Motor, the DC terminal of the first right wheel hub electric machine controller are used to receive the direct current of the DC power supply and are converted to
It is exported by exchanging end to the described first right hub motor after alternating current；The DC terminal of the first left wheel hub electric machine controller with
The DC terminal of the first right wheel hub electric machine controller is serially connected with the DC power supply.
Hub motor differential speed system as described above, the three-phase alternating current input line of the first left wheel hub motor is two-by-two
Between be provided with switching device, the three-phase alternating current input line of the first right hub motor is provided with switch dress between any two
It sets.
Hub motor differential speed system as described above, the switching device are that manual switchgroup or motor switch fill
It sets.
Hub motor differential speed system as described above, the DC terminal of the first left wheel hub electric machine controller include straight
Input terminal and DC output end are flowed, the DC terminal of the first right wheel hub electric machine controller includes direct-flow input end and direct current output
End, the direct-flow input end of the direct-flow input end of the first left wheel hub electric machine controller and the first right wheel hub electric machine controller
Between be connected with switch DJ1, the DC output end of the first left wheel hub electric machine controller and the described first right hub motor control
Be connected with switch DJ2 between the DC output end of device processed, the DC output end of the first left wheel hub electric machine controller with it is described
Switch DJ3 is connected between the direct-flow input end of first right wheel hub electric machine controller, the switch DJ3 is normally closed switch, institute
Switch DJ1, DJ2 are stated as open type switch.
Hub motor differential speed system as described above, the system comprises the second left wheel hub motors, the second left wheel hub
Electric machine controller, the second right hub motor, the second right wheel hub electric machine controller；The direct current of the second left wheel hub electric machine controller
End is exported by exchanging end to second left side for receiving the direct current of the DC power supply and being converted to after alternating current
Hub motor, the DC terminal of the second right wheel hub electric machine controller are used to receive the direct current of the DC power supply and turn
It is exported by exchanging end to the described second right hub motor after chemical conversion alternating current；The direct current of the second left wheel hub electric machine controller
End and the DC terminal of the second right wheel hub electric machine controller are serially connected with the DC power supply.
Hub motor differential speed system as described above, the three-phase alternating current input line of the first left wheel hub motor is two-by-two
Between be provided with switching device, the three-phase alternating current input line of the first right hub motor is provided with switch dress between any two
It sets, the three-phase alternating current input line of the second left wheel hub motor is provided with switching device, the second right wheel hub between any two
The three-phase alternating current input line of motor is provided with switching device between any two.
Hub motor differential speed system as described above, the switching device are that manual switchgroup or motor switch fill
It sets.
Hub motor differential speed system as described above, the DC terminal of the first left wheel hub electric machine controller include straight
Input terminal and DC output end are flowed, the DC terminal of the first right wheel hub electric machine controller includes direct-flow input end and direct current output
End, the direct-flow input end of the direct-flow input end of the first left wheel hub electric machine controller and the first right wheel hub electric machine controller
Between be connected with switch DJ1, the DC output end of the first left wheel hub electric machine controller and the described first right hub motor control
Be connected with switch DJ2 between the DC output end of device processed, the DC output end of the first left wheel hub electric machine controller with it is described
Switch DJ3 is connected between the direct-flow input end of first right wheel hub electric machine controller, the switch DJ3 is normally closed switch, institute
Switch DJ1, DJ2 are stated as open type switch.
A kind of hub motor, the hub motor include rotor assembly and stator module, and the stator module includes refrigerant
Heat carrier, hub motor control device are installed on the refrigerant heat carrier.
A kind of electric car, including above-mentioned hub motor differential speed system or wheel hub as claimed in claim 9 electricity
Machine.
Compared with prior art, the advantages and positive effects of the present invention are：Hub motor differential speed system of the present invention
The DC terminal of first left wheel hub electric machine controller and the DC terminal of the first right wheel hub electric machine controller are serially connected with DC power supply,
Thus, the input current of the first left wheel hub electric machine controller and the first right wheel hub electric machine controller keeps balance, and input voltage is then
It is mutually divided as the revolving speed of two hub motors is different, the inside motor that Ackermann steer angle is turned increases due to frictional force
And slow down, cause the input voltage of inside motor to reduce, thus, the input voltage of outside motor increases, the revolving speed of outside motor
It is just automatic to increase.Thus, the revolving speed of hub motor of the invention is determined by actual road conditions and angle of turn completely, without calculating,
Unequal distance traveling can be made in the form of pure rolling by meeting both sides hub motor, reduce the friction of tire and ground.Energy of the present invention
The shortcomings that enough overcoming existing E-Diff realizes the effect of mechanical differential gear box, but the not complicated machinery knot of mechanical differential gear box
Structure.Thus, effect of the invention is better than existing machinery differential mechanism and E-Diff.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Detailed description of the invention
Fig. 1 is that the specific embodiment of the invention two drives automatically controlled P grades of schematic diagram.
Fig. 2 is that the specific embodiment of the invention two drives the automatically controlled P grades of schematic diagram with differential locking.
Fig. 3 is that the specific embodiment of the invention two drives manual P grades of schematic diagram.
Fig. 4 is that the specific embodiment of the invention two drives the manual P grades of schematic diagram with differential locking.
Fig. 5 is the automatically controlled P grades of schematic diagram with differential locking of specific embodiment of the invention 4 wheel driven.
Fig. 6 is the manual P grades of schematic diagram with differential locking of specific embodiment of the invention 4 wheel driven.
Fig. 7 is the schematic diagram of specific embodiment of the invention hub motor control device and stator coil.
Fig. 8 is the functional block diagram of specific embodiment of the invention control system of electric automobile.
Fig. 9 is the exploded view of specific embodiment of the invention hub motor.
Figure 10 is the automatically controlled P grades of schematic diagram with differential locking of specific embodiment of the invention 4 wheel driven.
Figure 11 is the manual P grades of schematic diagram with differential locking of specific embodiment of the invention 4 wheel driven.
Specific embodiment
A specific embodiment of the invention is described in detail with reference to the accompanying drawing.
Embodiment 1
The present embodiment proposes a kind of two drive electric automobiles, including the near front wheel, left rear wheel, off-front wheel and off hind wheel, wherein passes through
In-wheel motor driving tyre rotation, in the present embodiment, including the left D of the left back hub motor and right D of off hind wheel hub motor, it is driven for rear-wheel
It is dynamic.It is front-wheel drive, in protection scope of the present invention it is of course also possible to include left front hub motor and off-front wheel hub motor
Within, still, since the realization principle of the two is identical, the present embodiment is only illustrated by taking rear wheel drive as an example.
As shown in Figs. 1-2, the electric car of the present embodiment includes hub motor differential speed system, and hub motor electronics is poor
Speed system includes the left D of left back hub motor, left controller, the right D of off hind wheel hub motor, right controller and DC power supply.Left D
It is installed on left rear wheel, for driving left rear wheel to rotate, right D is installed on off hind wheel, for driving off hind wheel to rotate.Direct current supplies
Power supply is generally battery group.
Left controller and right controller include DC terminal and exchange end.The DC terminal of left controller is for receiving direct current confession
The direct current of power supply and being converted to after alternating current is exported by exchanging end to the left D of left back hub motor.The direct current of right controller
End is exported by exchanging end to the off hind wheel hub motor right side for receiving the direct current of DC power supply and being converted to after alternating current
D。
Wherein, the DC terminal of left controller and the DC terminal of right controller are serially connected with DC power supply.Specifically, left control
The DC terminal of device processed includes direct-flow input end and DC output end, and the DC terminal of right controller includes that direct-flow input end and direct current are defeated
Outlet.The anode of DC power supply is connected to the direct-flow input end of left controller by conducting wire, and the DC output end of left controller is logical
The direct-flow input end that conducting wire is connected to right controller is crossed, the DC output end of right controller is connected to DC power supply by conducting wire
Cathode.
Since the DC terminal of left controller and the DC terminal of right controller are serially connected with DC power supply, thus, left control
The electric current of device and right controller keeps balance, that is, the input current of left controller is identical always as the input current of right controller.
Input voltage then with the mutually partial pressure of revolving speed difference two of two hub motors, the inside motor that Ackermann steer angle is turned due to
Frictional force increases and slows down, and the input voltage of inside motor is caused to reduce, thus, the input voltage of outside motor increases, outside
The revolving speed of motor is just automatic to be increased.The revolving speed of hub motor, which raises and reduces, is from the relationship directly proportional to voltage.When
Two driving wheels will generate the opposite additional force load of both direction at this time when electric car is turned, at this point, inside wheel hub is electric
Machine revolving speed reduces, and input voltage also reduces, and back-emf voltage also reduces, but the current balance type of two hub motors, thus outer
The voltage of side hub motor increases, and revolving speed also increases, and back-emf voltage also increases.
As shown in fig. 7, the output end of left controller connects with the stator coil of left wheel hub motor, the output end of right controller
Connect with the stator coil of right hub motor.
When straight-line travelling, left wheel hub motor is identical with the revolving speed of right hub motor.
When right-hand bend, right hub motor is slowed down since frictional force increases, and the input voltage of right hub motor is caused to reduce,
That is, the input voltage of right controller reduces, thus, the input voltage of left controller increases, that is, the input of left wheel hub motor
Voltage increases, and the revolving speed of left wheel hub motor just increases.
When left-hand bend, left wheel hub motor slows down since frictional force increases, and the input voltage of left wheel hub motor is caused to reduce,
Namely the input voltage of left controller reduces, thus, the input voltage of right controller increases namely the input of right hub motor electricity
Pressure increases, and the revolving speed of right hub motor just increases.
The left controller of hub motor differential speed system of the present embodiment and right controller independent control, dual controller it is straight
Flow input side series connection interlocking, can automatically adjust the revolving speed of each hub motor according to different road conditions, working principle completely and
Mechanical differential gear box principle is identical, can achieve the effect that mechanical differential gear box, and structure simplifies, and has very high reliability, whole to be
System production cost substantially reduces.
As shown in figure 8, electric car further includes control computer, control computer receives accelerator, brake sensor and fills
The signal of electric control sensor simultaneously outputs control signals to DC power supply, left controller and right controller.
In order to increase reliability when electric car stagnation of movement, the present embodiment increases P grades of functions.
As shown in Figure 1, the switching device of the present embodiment is electric opening/closing device.The three-phase alternating current of the left back left D of hub motor
Input line is provided with switching device DK1, DK2 between any two, and the three-phase alternating current input line of the right D of off hind wheel hub motor is between any two
It is provided with switching device DK3, DK4.
For example, switching device is relay, pass through the opening and closing of relay coil control switch device.When electric car works
When, switching device is normally open, when electric car close stagnation of movement when, control switch device be closed state, at this point, left D and
Right D is short-circuited, and can not be worked, and stagnation of movement safety is increased.
Certainly, as shown in figure 3, the switching device of the present embodiment may be manual switchgroup, the left back left D of hub motor
Three-phase alternating current input line be provided with switching device CD, the three-phase alternating current input line two of the right D of off hind wheel hub motor between any two
Switching device CD is provided between two.Four switching device synchronously controls.
In the case where road conditions are relatively sliding（For example, ice-snow field or rainy day）, when turning is easy to happen sideslip, existing differential mechanism,
As long as a wheel falls into slipping state, the wheel of the differential mechanism other end can completely lose power and not move at all.To solve this
A problem, the present embodiment control the synchronous conversion locking of differential mechanism, so that differential action is temporarily failed, more effectively output is strong in this way
Function torque.
Specifically, as shown in Fig. 2, being connected between the direct-flow input end of left controller and the direct-flow input end of right controller
There is switch DJ1, switch DJ2, left control are connected between the DC output end of left controller and the DC output end of right controller
Switch DJ3 is connected between the DC output end of device and the direct-flow input end of right controller, switch DJ3 is normally closed switch, is opened
DJ1, DJ2 are closed as open type switch.As shown in Fig. 2, differential lock is automatically controlled differential lock.
When electric car normally travel, DJ3 closure, DJ1, DJ2 are disconnected, and can be realized differential function.It is needed in electric car
When closing differential function, DJ3 disconnect, DJ1, DJ2 be closed or in which one of be closed, for closing differential function.
Certainly, differential lock may be manual differential lock, as shown in Figure 4.
The present embodiment also proposed a kind of hub motor, and hub motor includes rotor assembly and stator module, wherein in order to
Realize the heat dissipation of hub motor, stator module includes refrigerant heat carrier, and hub motor control device is installed on refrigerant heat carrier.It will
Inside the fixed integrated hub motor of hub motor control device, on the refrigerant heat carrier of hub motor, the heat dissipation speed of controller
It spends synchronous with the radiating rate of hub motor.
As shown in figure 9, the hub motor of the present embodiment includes outer rotor component and default sub-component.
Default sub-component includes motor shaft, the stator seat being set on motor shaft and the stator coil on stator seat.
Stator seat is refrigerant heat carrier, and refrigerant flow-guiding channel is provided in stator seat, and stator seat is refrigerant heat carrier.Controller is mounted on
On stator seat, it is preferably mounted on the end face of stator seat.
Outer rotor component includes electric machine casing, is located at the intracorporal magnet steel of motor casing.
Certainly, hub motor also may include internal rotor component and external stator component, and external stator component includes shell, shell
It is inside provided with refrigerant flow-guiding channel, shell is refrigerant heat carrier.Controller is mounted on shell.In protection scope of the present invention
In meeting.
Embodiment 2
The present embodiment the difference from embodiment 1 is that, the present embodiment proposes a kind of four-wheel driven electric vehicle, including left back hub motor
D before D, the left front D of the near front wheel hub motor and off-front wheel hub motor are right after left back D, off hind wheel hub motor are right.
As seen in figs. 5-6, the electric car of the present embodiment includes hub motor differential speed system, and hub motor electronics is poor
Controller, left front wheel hub after speed system includes D after the left back D of left back hub motor, left back controller, off hind wheel hub motor are right, is right
D before the left front D of motor, left front controller, off-front wheel hub motor are right, it is right before controller and DC power supply.Left back D is installed on a left side
On rear-wheel, for driving left rear wheel to rotate, D is installed on off hind wheel behind the right side, and for driving off hind wheel to rotate, left front D is installed on
On the near front wheel, for driving the near front wheel to rotate, D is installed on off-front wheel before the right side, for driving off-front wheel to rotate.Direct current supply electricity
Source is generally battery group.
Left back controller, left front controller, it is right after controller and controller before the right side include DC terminal and exchange end.It is left back
The DC terminal of controller is used to receive the direct current of DC power supply and is exported by exchanging end to a left side after being converted to alternating current
The left back D of rear-wheel hub motor, the DC terminal of left front controller are used to receive the direct current of DC power supply and are converted to alternating current
It is exported afterwards by exchanging end to the left front D of left front hub motor.The DC terminal of controller is for receiving DC power supply behind the right side
Direct current and be converted to after alternating current by exchange end export to off hind wheel hub motor it is right after D, it is right before the DC terminal of controller use
D before being exported by exchange end to the off-front wheel hub motor right side in the direct current for receiving DC power supply and after being converted to alternating current.
Wherein, the DC terminal of left back controller and the DC terminal of controller behind the right side are serially connected with DC power supply.Specifically,
The DC terminal of left back controller includes direct-flow input end and DC output end, and the DC terminal of controller includes direct-flow input end behind the right side
And DC output end.The anode of DC power supply is connected to the direct-flow input end of left back controller by conducting wire, left back controller
DC output end is connected to the direct-flow input end of controller behind the right side by conducting wire, and the DC output end of controller passes through conducting wire behind the right side
It is connected to the cathode of DC power supply.
The DC terminal of controller is serially connected with DC power supply before the DC terminal of left front controller and the right side.Specifically, left front
The DC terminal of controller includes direct-flow input end and DC output end, it is right before the DC terminal of controller include direct-flow input end and straight
Flow output end.The anode of DC power supply is connected to the direct-flow input end of left front controller, the direct current of left front controller by conducting wire
Output end is connected to the direct-flow input end of controller before the right side by conducting wire, and the DC output end of controller passes through conducting wire and connects before the right side
To the cathode of DC power supply.
Left back controller with it is right after controller concatenate after circuit concatenated with left front controller with controller before the right side after electricity
Road simultaneously connects.
Due to left back（Before）After the DC terminal of controller and the right side（Before）The DC terminal of controller is serially connected with DC power supply,
Thus, it is left back（Before）After controller and the right side（Before）The electric current of controller keeps balance, that is, left back（Before）The input current of controller
Behind the right side（Before）The input current of controller is identical always.Input voltage is then as the revolving speed difference two of two hub motors is mutual
Partial pressure, the inside motor that Ackermann steer angle is turned slow down since frictional force increases, and lead to the input voltage drop of inside motor
It is low, thus, the input voltage of outside motor increases, and the revolving speed of outside motor is just automatic to be increased.The revolving speed of hub motor increase and
Reduction is from the relationship directly proportional to voltage.When electric car turning, two driving wheels will generate two sides at this time
To opposite additional force load, at this point, inside wheel hub motor speed reduces, input voltage is also reduced, and back-emf voltage also drops
It is low, but the current balance type of two hub motors, thus the voltage of outside hub motor increases, revolving speed also increases, counter electromotive force electricity
Pressure also increases.
It is left back when straight-line travelling（Before）After hub motor and the right side（Before）The revolving speed of hub motor is identical.
When right-hand bend, after right（Before）Hub motor is slowed down since frictional force increases, after leading to the right side（Before）Hub motor
Input voltage reduces, that is, behind the right side（Before）The input voltage of controller reduces, thus, it is left back（Before）The input voltage of controller
It increases, that is, left back（Before）The input voltage of hub motor increases, left back（Before）The revolving speed of hub motor just increases.
It is left back when left-hand bend（Before）Hub motor is slowed down since frictional force increases, and is caused left back（Before）Hub motor
Input voltage reduce namely it is left back（Before）The input voltage of controller reduces, thus, after right（Before）The input voltage liter of controller
After height namely the right side（Before）The input voltage of hub motor increases, after right（Before）The revolving speed of hub motor just increases.
In order to increase reliability when electric car stagnation of movement, the present embodiment increases P grades of functions.
As shown in figure 5, the switching device of the present embodiment is electric opening/closing device.
The three-phase alternating current input line of the left front left front D of hub motor is provided with switching device DK1, DK2 between any two, before right
The three-phase alternating current input line of D is provided with switching device DK3, DK4 between any two before hub motor is right.
The three-phase alternating current input line of the left back left back D of hub motor is provided with switching device DK5, DK6 between any two, after right
The three-phase alternating current input line of D is provided with switching device DK7, DK8 between any two after hub motor is right.
For example, switching device is relay, pass through the opening and closing of relay coil control switch device.When electric car works
When, switching device is normally open, and when electric car closes stagnation of movement, control switch device is closed state, at this point, left front
（Afterwards）D and it is right before（Afterwards）D is short-circuited, and can not be worked, and stagnation of movement safety is increased.
Certainly, as shown in fig. 6, the switching device of the present embodiment may be manual switchgroup, left back hub motor is left
The three-phase alternating current input line of D is provided with switching device CD between any two afterwards, the three-phase alternating current input of D after off hind wheel hub motor is right
Line is provided with switching device CD between any two.Four switching device synchronously controls.The three-phase alternating current of the left front left front D of hub motor
Input line is provided with switching device CD between any two, and the three-phase alternating current input line of D is equal between any two before off-front wheel hub motor is right
It is provided with switching device CD.Four switching device synchronously controls.
In the case where road conditions are relatively sliding（For example, ice-snow field or rainy day）, when turning is easy to happen sideslip, existing differential mechanism,
As long as a wheel falls into slipping state, the wheel of the differential mechanism other end can completely lose power and not move at all.To solve this
A problem, the present embodiment control the synchronous conversion locking of differential mechanism, so that differential action is temporarily failed, more effectively output is strong in this way
Function torque.
Specifically, as shown in figure 5, after the direct-flow input end of left back controller and the right side between the direct-flow input end of controller
It is connected with switch DJ1, is connected with switch after the DC output end of left back controller and the right side between the DC output end of controller
DJ2 is connected with switch DJ3 between the direct-flow input end of controller after the DC output end of left back controller and the right side, and switch DJ3 is
Normally closed switch, switch DJ1, DJ2 are open type switch.As shown in Fig. 2, differential lock is automatically controlled differential lock.
When electric car normally travel, DJ3 closure, DJ1, DJ2 are disconnected, and can be realized differential function.It is needed in electric car
When closing differential function, DJ3 disconnect, DJ1, DJ2 be closed or in which one of be closed, for closing differential function.
Certainly, differential lock may be manual differential lock, as shown in Figure 6.
Certainly, manual differential lock or automatically controlled differential lock further can also be set in left front controller and controller before the right side, with
Realize locking or unlocking for front wheels and rear wheels differential.As shown in Figure 10,11.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of hub motor differential speed system, which is characterized in that the system comprises the first left wheel hub motors, the first revolver
Hub electric machine controller, the first right hub motor, the first right wheel hub electric machine controller and DC power supply；First left wheel hub
The DC terminal of electric machine controller is used to receive the direct current of the DC power supply and is converted to after alternating current through exchange end
Output is to the first left wheel hub motor, and the DC terminal of the first right wheel hub electric machine controller is for receiving the direct current supply
The direct current of power supply and being converted to after alternating current is exported by exchanging end to the described first right hub motor；First left wheel hub
The DC terminal of electric machine controller and the DC terminal of the first right wheel hub electric machine controller are serially connected with the DC power supply.
2. hub motor differential speed system according to claim 1, which is characterized in that the first left wheel hub motor
Three-phase alternating current input line is provided with switching device between any two, and the three-phase alternating current input line of the first right hub motor is two-by-two
Between be provided with switching device.
3. hub motor differential speed system according to claim 2, which is characterized in that the switching device is to open manually
Close device or electric opening/closing device.
4. hub motor differential speed system according to claim 1 to 3, which is characterized in that described first is left
The DC terminal of hub motor control device includes direct-flow input end and DC output end, the first right wheel hub electric machine controller it is straight
Flowing end includes direct-flow input end and DC output end, the direct-flow input end of the first left wheel hub electric machine controller and described first
Switch DJ1, the direct current of the first left wheel hub electric machine controller are connected between the direct-flow input end of right wheel hub electric machine controller
Switch DJ2, first left wheel hub are connected between output end and the DC output end of the first right wheel hub electric machine controller
Switch is connected between the DC output end of electric machine controller and the direct-flow input end of the first right wheel hub electric machine controller
DJ3, the switch DJ3 are normally closed switch, and described switch DJ1, DJ2 are open type switch.
5. hub motor differential speed system according to claim 1, which is characterized in that the system comprises the second revolvers
Hub motor, the second left wheel hub electric machine controller, the second right hub motor, the second right wheel hub electric machine controller；Second revolver
The DC terminal of hub electric machine controller is used to receive the direct current of the DC power supply and passes through exchange after being converted to alternating current
End output to the second left wheel hub motor, the DC terminal of the second right wheel hub electric machine controller is supplied for receiving the direct current
The direct current of power supply and being converted to after alternating current is exported by exchanging end to the described second right hub motor；Second revolver
The DC terminal of hub electric machine controller and the DC terminal of the second right wheel hub electric machine controller are serially connected with the DC power supply.
6. hub motor differential speed system according to claim 5, which is characterized in that the first left wheel hub motor
Three-phase alternating current input line is provided with switching device between any two, and the three-phase alternating current input line of the first right hub motor is two-by-two
Between be provided with switching device, the three-phase alternating current input line of the second left wheel hub motor is provided with switch dress between any two
It sets, the three-phase alternating current input line of the second right hub motor is provided with switching device between any two.
7. hub motor differential speed system according to claim 6, which is characterized in that the switching device is to open manually
Close device or electric opening/closing device.
8. according to hub motor differential speed system described in claim 5-7 any one, which is characterized in that described first is left
The DC terminal of hub motor control device includes direct-flow input end and DC output end, the first right wheel hub electric machine controller it is straight
Flowing end includes direct-flow input end and DC output end, the direct-flow input end of the first left wheel hub electric machine controller and described first
Switch DJ1, the direct current of the first left wheel hub electric machine controller are connected between the direct-flow input end of right wheel hub electric machine controller
Switch DJ2, first left wheel hub are connected between output end and the DC output end of the first right wheel hub electric machine controller
Switch is connected between the DC output end of electric machine controller and the direct-flow input end of the first right wheel hub electric machine controller
DJ3, the switch DJ3 are normally closed switch, and described switch DJ1, DJ2 are open type switch.
9. a kind of based on hub motor described in claim 1-8 any one, which is characterized in that the hub motor includes turning
Sub-component and stator module, the stator module include refrigerant heat carrier, and it is thermally conductive that hub motor control device is installed on the refrigerant
On body.
10. a kind of electric car, which is characterized in that the electric car includes wheel hub described in claim 1-8 any one
Motor electronic differential system or hub motor as claimed in claim 9.
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| CN201810912512.3A CN108859733A (en) | 2018-08-12 | 2018-08-12 | A kind of electric car, hub motor and hub motor differential speed system |
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| CN201810912512.3A CN108859733A (en) | 2018-08-12 | 2018-08-12 | A kind of electric car, hub motor and hub motor differential speed system |
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