CN112623099A - Power control system and method for electric bicycle - Google Patents
Power control system and method for electric bicycle Download PDFInfo
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- CN112623099A CN112623099A CN202011538286.0A CN202011538286A CN112623099A CN 112623099 A CN112623099 A CN 112623099A CN 202011538286 A CN202011538286 A CN 202011538286A CN 112623099 A CN112623099 A CN 112623099A
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- reduction gear
- power
- shaft hole
- bearing
- electric bicycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
Abstract
The invention discloses a power control system and a method of an electric bicycle, wherein the electric bicycle comprises a frame, a middle shaft, a reduction gear and a motor, the frame is provided with a middle shaft hole and a reduction gear shaft hole at intervals along the horizontal direction, the middle shaft is rotatably arranged in the middle shaft hole through a first bearing, the reduction gear is rotatably arranged in the reduction gear shaft hole through a second bearing, and the motor is arranged on the frame and is in transmission connection with the middle shaft through the reduction gear; the power control system of the electric bicycle comprises a pressure sensor, an output control device and a power adjusting component; the power adjusting component is electrically connected with the output control device and can adjust the power distribution proportion of the output control device; the output control device is connected with the pressure sensor and can read and analyze the electric signal of the pressure sensor. The power control system and the power control method for the electric bicycle can regulate and control the output power of the motor, realize accurate power output, and have the advantages of simple structure, low cost and strong practicability.
Description
Technical Field
The invention belongs to the technical field of electric bicycles, and particularly relates to a power control system and method of an electric bicycle.
Background
An electric bicycle is a power-assisted bicycle, is a riding tool between a bicycle and an electric bicycle, provides kinetic energy required by the bicycle in advancing by electric power assisted manpower, and is a product of pursuing a high-efficiency, convenient, healthy and environment-friendly life style.
In order to make the electric bicycle more suitable for providing the rider with power assist, a power output control system for controlling the output power of the motor is provided on the electric bicycle. The conventional power output system of the electric bicycle has very extensive adjustment on the output power of a motor, and cannot provide the power assistance of a specific range value required by a rider, so that the provided power assistance often brings inconvenience to the rider due to overlarge or undersize, and the power output system cannot help the rider to save power.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a power control system and method for an electric bicycle, which can achieve accurate power output, have a simple structure and low cost, and are suitable for popularization and application.
In order to achieve the above object, in one aspect, the present invention provides a power control system for an electric bicycle, wherein the electric bicycle comprises a frame, a center shaft, a reduction gear and a motor, the frame is provided with a center shaft hole and a reduction gear shaft hole at intervals along a horizontal direction, the center shaft is rotatably disposed in the center shaft hole through a first bearing, the reduction gear is rotatably disposed in the reduction gear shaft hole through a second bearing, and the motor is mounted on the frame and is in transmission connection with the center shaft through the reduction gear; the power control system of the electric bicycle is characterized by comprising a pressure sensor, an output control device and a power adjusting assembly, wherein the pressure sensor comprises a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged between the first bearing and the middle shaft hole and can detect the first pressure of the first bearing to the middle shaft hole along the radial direction; the second pressure sensor is arranged between the second bearing and the reduction gear shaft hole and can detect second pressure of the second bearing to the reduction gear shaft hole along the radial direction; the power adjusting assembly is electrically connected with the output control device and can adjust the power distribution proportion of the output control device; the output control device is connected with the pressure sensor and can read and analyze the electric signal of the pressure sensor and control the motor to operate according to the power distribution proportion so as to realize the control of the power assisting power.
In one example, the first pressure sensor includes a first effective pressure sensor located on a side of the first bearing close to the flywheel of the electric bicycle, and the first effective pressure sensor is capable of detecting a first effective pressure of the first bearing on the center shaft hole in a direction toward the flywheel.
On the other hand, the invention also provides a power control method of the electric bicycle, wherein the electric bicycle comprises a frame, a middle shaft, a reduction gear and a motor, the frame is provided with a middle shaft hole and a reduction gear shaft hole at intervals along the horizontal direction, the middle shaft is rotatably arranged in the middle shaft hole through a first bearing, the reduction gear is rotatably arranged in the reduction gear shaft hole through a second bearing, and the motor is arranged on the frame and is in transmission connection with the middle shaft through the reduction gear; the method for controlling the power of the electric bicycle is characterized by comprising the following steps of: detecting a first pressure of the first bearing to the middle shaft hole along the radial direction; detecting a second pressure of the second bearing to the reduction gear shaft hole along the radial direction; and calculating the proportion of the output of the human treading to the rear wheel according to the first pressure and the second pressure, and dynamically controlling the output power of the motor according to the set boosting proportion.
In one example, the electric bicycle further comprises a chain wheel coaxially arranged on the middle shaft, and the chain wheel is in transmission connection with a flywheel of the electric bicycle; the dynamic control of the output power of the motor specifically comprises the following steps: calculating the total transmission torque of the chain wheel; calculating a first partial transmission torque of the reduction gear to the chain wheel; and adjusting the power of the motor to enable the ratio of the first sub-transmission torque to the total transmission torque to meet a set assistance ratio.
In one example, the electric bicycle further comprises an upstream transmission gear in transmission connection with the reduction gear, and an included angle between the axis of the reduction gear and a connecting line of the axis of the chain wheel and the axis of the upstream transmission gear is a first included angle; calculating a first partial transmission torque of the reduction gear to the chain wheel specifically comprises the following steps: and calculating a first sub-transmission torque transmitted from the reduction gear to the chain wheel according to the first included angle and the second pressure.
In one example, calculating the total drive torque of the crankset in particular comprises the following steps: and detecting a first effective pressure of the first bearing to the center shaft hole towards the direction of the flywheel, and calculating the total transmission torque of the chain wheel according to the first effective pressure and the diameter of the chain wheel.
The power control system and the power control method for the electric bicycle provided by the invention can bring the following beneficial effects:
1. the pressure sensor is arranged, so that the acting force of the reduction gear and the chain wheel on the frame can be detected when the motor and the manpower drive chain wheel rotate, the power generated by the motor and the manpower for driving the chain wheel to rotate is calculated, the output power of the motor can be regulated and controlled through the output controller and the power regulating assembly, and accurate power output can be realized.
2. Through detecting first effective pressure, can filter other irrelevant effort, reduce the interference, guarantee the precision of sampling data, improve the precision of helping hand output.
3. The power control method of the electric bicycle has the advantages of simple principle, less required elements, easiness in obtaining, low cost, easiness in implementation, simple integral connection structure of all elements, high reliability, low failure rate and high practicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an assembly view of a pressure sensor of the power control system for an electric bicycle according to the present invention.
Detailed Description
In order to more clearly explain the overall concept of the invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description of the present specification, reference to the description of the terms "one aspect," "some aspects," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
As shown in fig. 1, the electric bicycle includes a frame, a middle axle 1, a reduction gear 2 and a motor, the frame is provided with a middle axle hole 11 and a reduction gear axle hole 21 at intervals along a horizontal direction, the middle axle 1 is rotatably provided in the middle axle hole 11 through a first bearing 12, the reduction gear 2 is rotatably provided in the reduction gear axle hole 21 through a second bearing 22, and the motor is mounted on the frame and is in transmission connection with the middle axle 1 through the reduction gear 2.
In view of the above electric bicycle, an embodiment of the present invention provides an electric bicycle power control system, which includes a pressure sensor 3, an output control device, and a power adjustment assembly, where the pressure sensor 3 includes a first pressure sensor 31 and a second pressure sensor 32, the first pressure sensor 31 is disposed between the first bearing 12 and the center axle hole 11, and is capable of detecting a first pressure of the first bearing 12 in a radial direction of the center axle hole 11; the second pressure sensor 32 is disposed between the second bearing 22 and the reduction gear shaft hole 21, and is capable of detecting a second pressure of the second bearing 22 to the reduction gear shaft hole 21 in the radial direction; the power adjusting component is electrically connected with the output control device and can adjust the power distribution proportion of the output control device; the output control device is connected with the pressure sensor 3 and can read and analyze the electric signal of the pressure sensor 3 and control the motor to operate according to the power distribution proportion so as to realize the control of the power assisting power. By arranging the pressure sensor 3, the acting force of the reduction gear and the chain wheel on the frame can be detected when the motor and the manpower drive chain wheel rotate, so that the power generated by the motor and the manpower for driving the chain wheel to rotate is calculated, the output power of the motor can be regulated and controlled through the output controller and the power regulating assembly, and accurate power output can be realized.
Specifically, the first pressure sensor 31 includes a first effective pressure sensor located on a side of the first bearing 12 close to the flywheel of the electric bicycle, and the first effective pressure sensor is capable of detecting a first effective pressure of the first bearing 12 toward the flywheel direction of the center shaft hole 11. Through detecting first effective pressure, can filter other irrelevant effort, reduce the interference, guarantee the precision of sampling data, improve the precision of helping hand output.
Based on the power control system of the electric bicycle, the invention also provides a power control method of the electric bicycle, which comprises the following steps:
first, a first pressure of the first bearing 12 in the radial direction to the center shaft hole 11 is detected.
Next, a second pressure of the second bearing 22 against the reduction gear shaft hole 21 in the radial direction is detected.
And finally, calculating the proportion of the output of the rear wheel by the manual treading according to the first pressure and the second pressure, and dynamically controlling the output power of the motor according to the set boosting proportion.
The dynamic control of the output power of the motor specifically comprises the following steps:
first, the total drive torque of the crankset is calculated.
The electric bicycle also comprises a chain wheel which is coaxially arranged on the middle shaft 1, and the chain wheel is in transmission connection with a flywheel of the electric bicycle; and detecting a first effective pressure of the first bearing 12 towards the direction of the flywheel in the central shaft hole 11, and calculating the total transmission torque of the toothed disc according to the first effective pressure and the diameter of the toothed disc.
Next, a first partial transmission torque of the reduction gear 2 to the crankset is calculated.
The electric bicycle also comprises an upstream transmission gear 4 in transmission connection with the reduction gear 2, and an included angle between the axis of the reduction gear 2 and a connecting line of the axis of the chain wheel and the axis of the upstream transmission gear 4 is a first included angle alpha; and calculating a first sub-transmission torque transmitted from the reduction gear 2 to the chain wheel according to the first included angle alpha and the second pressure.
And finally, dynamically controlling the output power of the motor to enable the ratio of the first sub-transmission torque to the total transmission torque to meet the set boosting ratio.
The power control method of the electric bicycle has the advantages of simple principle, less required elements, easiness in obtaining, low cost, easiness in implementation, simple integral connection structure of all elements, high reliability, low failure rate and high practicability.
The power-assisted control system of the electric vehicle comprises the following steps of:
the first pressure sensor detects a first effective pressure F1 of the central shaft 1 in the central shaft hole 11 in the direction facing the flywheel;
calculating the total transmission torque M (F1) D of the dental disc through the first effective pressure F1 and the diameter D of the dental disc;
the second pressure sensor detects a second pressure F2 in the radial direction of the second bearing 22 against the reduction gear shaft hole 21;
calculating a first partial transmission torque M1 (F2 cos (alpha/2)) D of the reduction gear 2 to the toothed disc through the first included angle alpha and the second pressure F2;
according to the power distribution ratio a set by the power regulating component, the output controller dynamically controls the second pressure F2 to be F1 a/cos (alpha/2) so that M1/M is a to realize the control of the boosting power ratio.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. A power control system of an electric bicycle comprises a frame, a middle shaft, a reduction gear and a motor, wherein the frame is provided with a middle shaft hole and a reduction gear shaft hole at intervals along the horizontal direction, the middle shaft is rotatably arranged in the middle shaft hole through a first bearing, the reduction gear is rotatably arranged in the reduction gear shaft hole through a second bearing, and the motor is arranged on the frame and is in transmission connection with the middle shaft through the reduction gear; the power control system of the electric bicycle is characterized by comprising a pressure sensor, an output control device and a power adjusting assembly, wherein the pressure sensor comprises a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged between the first bearing and the middle shaft hole and can detect the first pressure of the first bearing to the middle shaft hole along the radial direction; the second pressure sensor is arranged between the second bearing and the reduction gear shaft hole and can detect second pressure of the second bearing to the reduction gear shaft hole along the radial direction; the power adjusting assembly is electrically connected with the output control device and can adjust the power distribution proportion of the output control device; the output control device is connected with the pressure sensor and can read and analyze the electric signal of the pressure sensor and control the motor to operate according to the power distribution proportion so as to realize the control of the power assisting power.
2. The power control system of claim 1, wherein the first pressure sensor comprises a first effective pressure sensor located on a side of the first bearing adjacent to the flywheel of the electric bicycle, and the first effective pressure sensor is capable of detecting a first effective pressure of the first bearing on the direction of the flywheel toward the center hole.
3. A power control method of an electric bicycle comprises a frame, a middle shaft, a reduction gear and a motor, wherein the frame is provided with a middle shaft hole and a reduction gear shaft hole at intervals along the horizontal direction, the middle shaft is rotatably arranged in the middle shaft hole through a first bearing, the reduction gear is rotatably arranged in the reduction gear shaft hole through a second bearing, and the motor is arranged on the frame and is in transmission connection with the middle shaft through the reduction gear; it is characterized in that the preparation method is characterized in that,
the power control method of the electric bicycle comprises the following steps: detecting a first pressure of the first bearing to the middle shaft hole along the radial direction; detecting a second pressure of the second bearing to the reduction gear shaft hole along the radial direction; and calculating the proportion of the output of the human treading to the rear wheel according to the first pressure and the second pressure, and dynamically controlling the output power of the motor according to the set boosting proportion.
4. The power control method of the electric bicycle according to claim 3, wherein the electric bicycle further comprises a chain wheel coaxially arranged on the middle shaft, and the chain wheel is in transmission connection with a flywheel of the electric bicycle;
the dynamic control of the output power of the motor specifically comprises the following steps: calculating the total transmission torque of the chain wheel; calculating a first partial transmission torque of the reduction gear to the chain wheel; and adjusting the power of the motor to enable the ratio of the first sub-transmission torque to the total transmission torque to meet a set assistance ratio.
5. The power control method for the electric bicycle according to claim 4, wherein the electric bicycle further comprises an upstream transmission gear in transmission connection with the reduction gear, and an included angle between the axis of the reduction gear and a connecting line of the axis of the chain wheel and the axis of the upstream transmission gear is a first included angle;
calculating a first partial transmission torque of the reduction gear to the chain wheel specifically comprises the following steps: and calculating a first sub-transmission torque transmitted from the reduction gear to the chain wheel according to the first included angle and the second pressure.
6. The power control method of claim 4, wherein calculating the total driving torque of the crankset comprises the steps of: and detecting a first effective pressure of the first bearing to the center shaft hole towards the direction of the flywheel, and calculating the total transmission torque of the chain wheel according to the first effective pressure and the diameter of the chain wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538286.0A CN112623099A (en) | 2020-12-23 | 2020-12-23 | Power control system and method for electric bicycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538286.0A CN112623099A (en) | 2020-12-23 | 2020-12-23 | Power control system and method for electric bicycle |
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| CN112623099A true CN112623099A (en) | 2021-04-09 |
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| CN202011538286.0A Pending CN112623099A (en) | 2020-12-23 | 2020-12-23 | Power control system and method for electric bicycle |
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| CN204895747U (en) * | 2015-04-22 | 2015-12-23 | 苏州赛诺伊电动科技有限公司 | Put motor in electronic vehicle using motor and torque testing device thereof |
| CN106029489A (en) * | 2014-01-15 | 2016-10-12 | 新时代技研株式会社 | Power-assisted unit, power-assisted moving vehicle, power-assisted moving vehicles set, and power-assisted moving vehicle controlling method |
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| CN108516041A (en) * | 2018-05-07 | 2018-09-11 | 重庆三叶花科技有限公司 | Electric bicycle output control of engine power method |
| CN108860439A (en) * | 2018-08-15 | 2018-11-23 | 张云虎 | Its bicycle of moment sensing motor and application is set in a kind of electric assisted bicycle |
| CN209305765U (en) * | 2018-12-24 | 2019-08-27 | 广东高标电子科技有限公司 | A kind of torque detection transmission device and electric booster system |
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2020
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| CN1205954A (en) * | 1997-07-22 | 1999-01-27 | 本田技研工业株式会社 | Auxiliary propulsion-unit control device for use in electric auxiliary bike |
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| CN101559818A (en) * | 2009-05-16 | 2009-10-21 | 江南大学 | Control technology for electric motor car with nature boost function |
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Application publication date: 20210409 |